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Import zlib from GCC

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This commit is contained in:
H.J. Lu 2015-03-13 10:40:33 -07:00
parent b19a8f8545
commit 5ca28f7928
240 changed files with 81665 additions and 0 deletions
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211
zlib/CMakeLists.txt Normal file
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cmake_minimum_required(VERSION 2.4.4)
set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)
project(zlib C)
set(VERSION "1.2.7")
set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
set(INSTALL_INC_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")
set(INSTALL_MAN_DIR "${CMAKE_INSTALL_PREFIX}/share/man" CACHE PATH "Installation directory for manual pages")
set(INSTALL_PKGCONFIG_DIR "${CMAKE_INSTALL_PREFIX}/share/pkgconfig" CACHE PATH "Installation directory for pkgconfig (.pc) files")
include(CheckTypeSize)
include(CheckFunctionExists)
include(CheckIncludeFile)
include(CheckCSourceCompiles)
enable_testing()
check_include_file(sys/types.h HAVE_SYS_TYPES_H)
check_include_file(stdint.h HAVE_STDINT_H)
check_include_file(stddef.h HAVE_STDDEF_H)
#
# Check to see if we have large file support
#
set(CMAKE_REQUIRED_DEFINITIONS -D_LARGEFILE64_SOURCE=1)
# We add these other definitions here because CheckTypeSize.cmake
# in CMake 2.4.x does not automatically do so and we want
# compatibility with CMake 2.4.x.
if(HAVE_SYS_TYPES_H)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_TYPES_H)
endif()
if(HAVE_STDINT_H)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDINT_H)
endif()
if(HAVE_STDDEF_H)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDDEF_H)
endif()
check_type_size(off64_t OFF64_T)
if(HAVE_OFF64_T)
add_definitions(-D_LARGEFILE64_SOURCE=1)
endif()
set(CMAKE_REQUIRED_DEFINITIONS) # clear variable
#
# Check for fseeko
#
check_function_exists(fseeko HAVE_FSEEKO)
if(NOT HAVE_FSEEKO)
add_definitions(-DNO_FSEEKO)
endif()
#
# Check for unistd.h
#
check_include_file(unistd.h Z_HAVE_UNISTD_H)
if(MSVC)
set(CMAKE_DEBUG_POSTFIX "d")
add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
include_directories(${CMAKE_CURRENT_SOURCE_DIR})
endif()
if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
# If we're doing an out of source build and the user has a zconf.h
# in their source tree...
if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h)
message(STATUS "Renaming")
message(STATUS " ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h")
message(STATUS "to 'zconf.h.included' because this file is included with zlib")
message(STATUS "but CMake generates it automatically in the build directory.")
file(RENAME ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.included)
endif()
endif()
set(ZLIB_PC ${CMAKE_CURRENT_BINARY_DIR}/zlib.pc)
configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zlib.pc.cmakein
${ZLIB_PC} @ONLY)
configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.cmakein
${CMAKE_CURRENT_BINARY_DIR}/zconf.h @ONLY)
include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR})
#============================================================================
# zlib
#============================================================================
set(ZLIB_PUBLIC_HDRS
${CMAKE_CURRENT_BINARY_DIR}/zconf.h
zlib.h
)
set(ZLIB_PRIVATE_HDRS
crc32.h
deflate.h
gzguts.h
inffast.h
inffixed.h
inflate.h
inftrees.h
trees.h
zutil.h
)
set(ZLIB_SRCS
adler32.c
compress.c
crc32.c
deflate.c
gzclose.c
gzlib.c
gzread.c
gzwrite.c
inflate.c
infback.c
inftrees.c
inffast.c
trees.c
uncompr.c
zutil.c
)
if(NOT MINGW)
set(ZLIB_SRCS ${ZLIB_SRCS}
win32/zlib1.rc # If present will override custom build rule below.
)
endif()
# parse the full version number from zlib.h and include in ZLIB_FULL_VERSION
file(READ ${CMAKE_CURRENT_SOURCE_DIR}/zlib.h _zlib_h_contents)
string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([-0-9A-Za-z.]+)\".*"
"\\1" ZLIB_FULL_VERSION ${_zlib_h_contents})
if(MINGW)
# This gets us DLL resource information when compiling on MinGW.
if(NOT CMAKE_RC_COMPILER)
SET(CMAKE_RC_COMPILER windres.exe)
endif()
add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
COMMAND ${CMAKE_RC_COMPILER}
-D GCC_WINDRES
-I ${CMAKE_CURRENT_SOURCE_DIR}
-I ${CMAKE_CURRENT_BINARY_DIR}
-o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
-i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)
set(ZLIB_SRCS ${ZLIB_SRCS} ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
endif(MINGW)
add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
set_target_properties(zlib PROPERTIES SOVERSION 1)
if(NOT CYGWIN)
# This property causes shared libraries on Linux to have the full version
# encoded into their final filename. We disable this on Cygwin because
# it causes cygz-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
# seems to be the default.
#
# This has no effect with MSVC, on that platform the version info for
# the DLL comes from the resource file win32/zlib1.rc
set_target_properties(zlib PROPERTIES VERSION ${ZLIB_FULL_VERSION})
endif()
if(UNIX)
# On unix-like platforms the library is almost always called libz
set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)
set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,${CMAKE_CURRENT_SOURCE_DIR}/zlib.map")
elseif(BUILD_SHARED_LIBS AND WIN32)
# Creates zlib1.dll when building shared library version
set_target_properties(zlib PROPERTIES SUFFIX "1.dll")
endif()
if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
install(TARGETS zlib zlibstatic
RUNTIME DESTINATION "${INSTALL_BIN_DIR}"
ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
LIBRARY DESTINATION "${INSTALL_LIB_DIR}" )
endif()
if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
install(FILES ${ZLIB_PUBLIC_HDRS} DESTINATION "${INSTALL_INC_DIR}")
endif()
if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
install(FILES zlib.3 DESTINATION "${INSTALL_MAN_DIR}/man3")
endif()
if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
install(FILES ${ZLIB_PC} DESTINATION "${INSTALL_PKGCONFIG_DIR}")
endif()
#============================================================================
# Example binaries
#============================================================================
add_executable(example test/example.c)
target_link_libraries(example zlib)
add_test(example example)
add_executable(minigzip test/minigzip.c)
target_link_libraries(minigzip zlib)
if(HAVE_OFF64_T)
add_executable(example64 test/example.c)
target_link_libraries(example64 zlib)
set_target_properties(example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
add_test(example64 example64)
add_executable(minigzip64 test/minigzip.c)
target_link_libraries(minigzip64 zlib)
set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
endif()

1409
zlib/ChangeLog Normal file
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359
zlib/ChangeLog.gcj Normal file
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2014-11-11 Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
PR target/63610
* configure: Regenerate.
2013-10-15 David Malcolm <dmalcolm@redhat.com>
* configure.ac: Add --enable-host-shared, setting up new
PICFLAG variable.
* Makefile.am: Add PICFLAG to libz_a_CFLAGS.
* Makefile.in: Regenerate.
* configure: Regenerate.
2013-09-20 Alan Modra <amodra@gmail.com>
* configure: Regenerate.
2012-11-16 Matthias Klose <doko@ubuntu.com>
* Imported zlib 1.2.7; merged local changes.
2012-09-14 David Edelsohn <dje.gcc@gmail.com>
* configure: Regenerated.
2012-05-16 H.J. Lu <hongjiu.lu@intel.com>
* configure: Regenerated.
2012-03-02 Matthias Klose <doko@ubuntu.com>
* Imported zlib 1.2.5; merged local changes.
2011-11-21 Andreas Tobler <andreast@fgznet.ch>
* configure: Regenerate.
2011-02-13 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* configure: Regenerate.
2010-04-02 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* Makefile.in: Regenerate.
* aclocal.m4: Regenerate.
2009-12-05 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* Makefile.in: Regenerate.
* configure: Regenerate.
2009-08-24 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* configure.ac (AC_PREREQ): Bump to 2.64.
2009-08-22 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* Makefile.am (install-html, install-pdf, html): Remove.
* Makefile.in: Regenerate.
* Makefile.in: Regenerate.
* aclocal.m4: Regenerate.
* configure: Regenerate.
2009-07-30 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* configure.ac (_AC_ARG_VAR_PRECIOUS): Use m4_rename_force.
2009-03-01 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* configure: Regenerate.
2008-12-18 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* configure: Regenerate.
2008-09-26 Peter O'Gorman <pogma@thewrittenword.com>
Steve Ellcey <sje@cup.hp.com>
* configure: Regenerate for new libtool.
* Makefile.in: Ditto.
2008-06-17 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* Makefile.in: Regenerate.
* configure: Regenerate.
2008-03-16 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* aclocal.m4: Regenerate.
* configure: Likewise.
* Makefile.in: Likewise.
2008-01-24 David Edelsohn <edelsohn@gnu.org>
* configure: Regenerate.
2007-07-05 H.J. Lu <hongjiu.lu@intel.com>
* aclocal.m4: Regenerated.
2007-05-23 Steve Ellcey <sje@cup.hp.com>
* Makefile.in: Regenerate.
* configure: Regenerate.
* aclocal.m4: Regenerate.
2007-04-14 Steve Ellcey <sje@cup.hp.com>
* Makefile.am: Add -I .. to ACLOCAL_AMFLAGS.
* Makefile.in: Regenerate.
2007-03-01 Brooks Moses <brooks.moses@codesourcery.com>
* Makefile.am: Add dummy install-pdf target.
* Makefile.in: Regenerate
2007-01-16 Jack Howarth <howarth@bromo.med.uc.edu>
* Makefile.am: Add ACLOCAL_AMFLAGS to use multi.m4.
* aclocal.m4: Regenerate.
* configure: Regenerate.
* Makefile.in: Regenerate.
2006-06-13 Carlos O'Donell <carlos@codesourcery.com>
* Makefile.am: Add html and install-html stubs.
* Makefile.in: Regenerate.
* aclocal.m4: Regenerate.
2005-06-14 Tom Tromey <tromey@redhat.com>
* Imported zlib 1.2.3; merged local changes.
2005-06-14 Tom Tromey <tromey@redhat.com>
PR libgcj/19877:
* configure, aclocal.m4, Makefile.in: Rebuilt.
2005-06-06 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
* zconf.h (NO_vsnprintf): Define on Tru64 UNIX V4.0.
2005-05-09 Mike Stump <mrs@apple.com>
* configure: Regenerate.
2005-04-12 Mike Stump <mrs@apple.com>
* configure: Regenerate.
2004-11-24 Kelley Cook <kcook@gcc.gnu.org>
* configure: Regenerate for libtool change.
2004-11-24 Kelley Cook <kcook@gcc.gnu.org>
* Makefile.in, aclocal.m4: Regenerate with automake 1.9.3.
2004-11-22 Eric Botcazou <ebotcazou@libertysurf.fr>
* zconf.h: Define NO_vsnprintf on Solaris 2.5.1.
2004-10-11 Tom Tromey <tromey@redhat.com>
PR libgcj/14856:
* Imported zlib 1.2.1; merged local changes.
2005-06-15 Paolo Bonzini <bonzini@gnu.org>
* Makefile.am: Remove useless multilib rules.
* configure.ac: Rewrite multilib support to use
features of recent automakes.
* aclocal.m4: Regenerate with Automake 1.8.5.
* Makefile.in: Regenerate with Automake 1.8.5.
* configure: Regenerate.
2004-04-12 Kelley Cook <kcook@gcc.gnu.org>
* Makefile.am: Add in libz_a_CFLAGS as recommended by automake doc.
* Makefile.in: Regenerate with automake 1.7.9.
* aclocal.m4: Likewise.
* configure: Regenerate.
2004-04-10 Kelley Cook <kcook@gcc.gnu.org>
* configure.in: Rename file to ...
* configure.ac: ...this.
* Makefile.in: Regenerate.
2004-04-09 Nathanael Nerode <neroden@gcc.gnu.org>
* configure.in: Update to autoconf 2.59; clean up slightly.
* acinclude.m4: Update to autoconf 2.59.
* aclocal.m4: Regenerate.
* Makefile.in: Regenerate.
* configure: Regenerate.
2004-01-14 Kelley Cook <kcook@gcc.gnu.org>
* configure.in: Add in AC_PREREQ(2.13)
2003-09-09 Alan Modra <amodra@bigpond.net.au>
* configure: Regenerate.
2003-07-11 Nathanael Nerode <neroden@gcc.gnu.org>
PR bootstrap/7126
* configure.in: Correct zlib version number.
* configure: Regenerate.
2003-07-11 Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>
* README: Note that zlib is not part of GCC.
2003-03-12 Andreas Schwab <schwab@suse.de>
* configure.in: Avoid trailing /. in toolexeclibdir.
* configure: Rebuilt.
2003-02-20 Alexandre Oliva <aoliva@redhat.com>
* configure.in: Propagate ORIGINAL_LD_FOR_MULTILIBS to
config.status.
* configure: Rebuilt.
2003-02-19 Alexandre Oliva <aoliva@redhat.com>
* configure.in (multiosdir): Set to nothing if compiler is not GCC
or if it doesn't support -print-multi-os-directory.
* configure: Rebuilt.
2002-09-22 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* Makefile.am (all-multi): Fix multilib parallel build.
2002-05-16 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
* configure.in: Allow for PWDCMD to override hardcoded pwd.
* configure: Regenerate.
* ChangeLog: Move entries to ChangeLog.gcj.
2002-05-08 Alexandre Oliva <aoliva@redhat.com>
* configure.in (ORIGINAL_LD_FOR_MULTILIBS): Preserve LD at
script entry, and set LD to it when configuring multilibs.
* configure: Rebuilt.
2002-03-17 Bryce McKinlay <bryce@waitaki.otago.ac.nz>
* Makefile.am: Make target library a convenience library.
* Makefile.in: Rebuilt.
2002-03-11 Tom Tromey <tromey@redhat.com>
* ChangeLog.gcj: Imported 1.1.4, while preserving local changes.
2001-07-03 Tom Tromey <tromey@redhat.com>
Fix for PR bootstrap/3281:
* configure, Makefile.in: Rebuilt.
* configure.in: Set mkinstalldirs, for in-tree build.
2001-06-09 Alexandre Oliva <aoliva@redhat.com>, Stephen L Moshier <moshier@mediaone.net>
* configure.in (AC_EXEEXT): Work around in case it expands to
nothing, as in autoconf 2.50.
* configure: Rebuilt.
2001-05-13 Alexandre Oliva <aoliva@redhat.com>
* acinclude.m4: Use ../libtool.m4.
* configure.in: Use ${zlib_basedir}/.. for AC_CONFIG_AUX_DIR.
* acinclude.m4, configure, Makefile.in: Rebuilt.
2000-10-24 Chris Demetriou <cgd@sibyte.com>
* configure.in: Invoke AC_PROG_CPP unconditionally before
conditional feature tests.
2000-10-10 Alexandre Oliva <aoliva@redhat.com>
* configure.in (zlib_basedir): Cope with empty with_target_subdir
* configure: Rebuilt.
2000-09-06 Alexandre Oliva <aoliva@redhat.com>
* configure.in (multilib): Enable by default only for target.
* configure: Rebuilt.
Sun Sep 3 12:37:12 2000 Anthony Green <green@redhat.com>
* configure.in: Add TARGET_LIBRARY conditional.
* configure: Rebuilt.
* Makefile.am: If we're building a build host library, call the
library libz.a and don't use libtool.
* Makefile.in: Rebuilt.
1999-10-04 Tom Tromey <tromey@cygnus.com>
* configure: Rebuilt.
* configure.in: Call AC_EXEEXT after LIB_AC_PROG_CC, but don't
actually let AC_EXEEXT run.
1999-09-28 Tom Tromey <tromey@cygnus.com>
* aclocal.m4, configure: Rebuilt.
* acinclude.m4 (LIB_AC_PROG_CC): Provide appropriate AC_PROG_ symbol.
Mon Aug 9 18:33:38 1999 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
* Makefile.in: Rebuilt.
* Makefile.am (toolexeclibdir): Add $(MULTISUBDIR) even for native
builds.
* configure: Rebuilt.
* configure.in: Properly align --help output, fix capitalization.
1999-08-02 Tom Tromey <tromey@cygnus.com>
* aclocal.m4, configure: Rebuilt for new libtool.
1999-07-19 Alexandre Oliva <oliva@dcc.unicamp.br>
* Makefile.am (*-recursive, *-am, *-multi): Automake does not
generate *-recursive for this Makefile, use *-am instead.
* Makefile.in: Rebuilt.
1999-06-21 Tom Tromey <tromey@cygnus.com>
* Makefile.in: Rebuilt.
* Makefile.am (libzgcj_la_LDFLAGS): Use -version-info, not
-release.
* Makefile.in: Rebuilt.
* Makefile.am (toolexeclibdir): Define as libdir when
appropriate.
* configure: Rebuilt.
* configure.in (USE_LIBDIR): New conditional.
1999-05-10 Tom Tromey <tromey@cygnus.com>
* configure, Makefile.in: Rebuilt.
* Makefile.am (EXTRA_LTLIBRARIES): New macro.
(toolexeclib_LTLIBRARIES): Use @target_all@.
* configure.in: Recognize --with-system-zlib. Subst target_all.
1999-05-04 Tom Tromey <tromey@cygnus.com>
* Makefile.in: Replace with automake-generated file.
* Makefile.am: New file.
* configure: Replaced with autoconf-generated script.
* aclocal.m4: New file.
* acinclude.m4: New file.
* configure.in: New file.
* Makefile: Removed.

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2014-09-24 David Malcolm <dmalcolm@redhat.com>
* ChangeLog.jit: Add copyright footer.
2013-10-07 David Malcolm <dmalcolm@redhat.com>
* Makefile.am: Add PICFLAG to libz_a_CFLAGS.
* configure.ac (--enable-host-shared): Set up PICFLAG rather
than attempting to append -fPIC to CFLAGS.
* Makefile.in: Regenerate.
* configure: Regenerate.
2013-10-03 David Malcolm <dmalcolm@redhat.com>
* configure.ac: Add --enable-host-shared.
* configure: Regenerate.
Copyright (C) 2013-2014 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.

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Frequently Asked Questions about zlib
If your question is not there, please check the zlib home page
http://zlib.net/ which may have more recent information.
The lastest zlib FAQ is at http://zlib.net/zlib_faq.html
1. Is zlib Y2K-compliant?
Yes. zlib doesn't handle dates.
2. Where can I get a Windows DLL version?
The zlib sources can be compiled without change to produce a DLL. See the
file win32/DLL_FAQ.txt in the zlib distribution. Pointers to the
precompiled DLL are found in the zlib web site at http://zlib.net/ .
3. Where can I get a Visual Basic interface to zlib?
See
* http://marknelson.us/1997/01/01/zlib-engine/
* win32/DLL_FAQ.txt in the zlib distribution
4. compress() returns Z_BUF_ERROR.
Make sure that before the call of compress(), the length of the compressed
buffer is equal to the available size of the compressed buffer and not
zero. For Visual Basic, check that this parameter is passed by reference
("as any"), not by value ("as long").
5. deflate() or inflate() returns Z_BUF_ERROR.
Before making the call, make sure that avail_in and avail_out are not zero.
When setting the parameter flush equal to Z_FINISH, also make sure that
avail_out is big enough to allow processing all pending input. Note that a
Z_BUF_ERROR is not fatal--another call to deflate() or inflate() can be
made with more input or output space. A Z_BUF_ERROR may in fact be
unavoidable depending on how the functions are used, since it is not
possible to tell whether or not there is more output pending when
strm.avail_out returns with zero. See http://zlib.net/zlib_how.html for a
heavily annotated example.
6. Where's the zlib documentation (man pages, etc.)?
It's in zlib.h . Examples of zlib usage are in the files test/example.c
and test/minigzip.c, with more in examples/ .
7. Why don't you use GNU autoconf or libtool or ...?
Because we would like to keep zlib as a very small and simple package.
zlib is rather portable and doesn't need much configuration.
8. I found a bug in zlib.
Most of the time, such problems are due to an incorrect usage of zlib.
Please try to reproduce the problem with a small program and send the
corresponding source to us at zlib@gzip.org . Do not send multi-megabyte
data files without prior agreement.
9. Why do I get "undefined reference to gzputc"?
If "make test" produces something like
example.o(.text+0x154): undefined reference to `gzputc'
check that you don't have old files libz.* in /usr/lib, /usr/local/lib or
/usr/X11R6/lib. Remove any old versions, then do "make install".
10. I need a Delphi interface to zlib.
See the contrib/delphi directory in the zlib distribution.
11. Can zlib handle .zip archives?
Not by itself, no. See the directory contrib/minizip in the zlib
distribution.
12. Can zlib handle .Z files?
No, sorry. You have to spawn an uncompress or gunzip subprocess, or adapt
the code of uncompress on your own.
13. How can I make a Unix shared library?
By default a shared (and a static) library is built for Unix. So:
make distclean
./configure
make
14. How do I install a shared zlib library on Unix?
After the above, then:
make install
However, many flavors of Unix come with a shared zlib already installed.
Before going to the trouble of compiling a shared version of zlib and
trying to install it, you may want to check if it's already there! If you
can #include <zlib.h>, it's there. The -lz option will probably link to
it. You can check the version at the top of zlib.h or with the
ZLIB_VERSION symbol defined in zlib.h .
15. I have a question about OttoPDF.
We are not the authors of OttoPDF. The real author is on the OttoPDF web
site: Joel Hainley, jhainley@myndkryme.com.
16. Can zlib decode Flate data in an Adobe PDF file?
Yes. See http://www.pdflib.com/ . To modify PDF forms, see
http://sourceforge.net/projects/acroformtool/ .
17. Why am I getting this "register_frame_info not found" error on Solaris?
After installing zlib 1.1.4 on Solaris 2.6, running applications using zlib
generates an error such as:
ld.so.1: rpm: fatal: relocation error: file /usr/local/lib/libz.so:
symbol __register_frame_info: referenced symbol not found
The symbol __register_frame_info is not part of zlib, it is generated by
the C compiler (cc or gcc). You must recompile applications using zlib
which have this problem. This problem is specific to Solaris. See
http://www.sunfreeware.com for Solaris versions of zlib and applications
using zlib.
18. Why does gzip give an error on a file I make with compress/deflate?
The compress and deflate functions produce data in the zlib format, which
is different and incompatible with the gzip format. The gz* functions in
zlib on the other hand use the gzip format. Both the zlib and gzip formats
use the same compressed data format internally, but have different headers
and trailers around the compressed data.
19. Ok, so why are there two different formats?
The gzip format was designed to retain the directory information about a
single file, such as the name and last modification date. The zlib format
on the other hand was designed for in-memory and communication channel
applications, and has a much more compact header and trailer and uses a
faster integrity check than gzip.
20. Well that's nice, but how do I make a gzip file in memory?
You can request that deflate write the gzip format instead of the zlib
format using deflateInit2(). You can also request that inflate decode the
gzip format using inflateInit2(). Read zlib.h for more details.
21. Is zlib thread-safe?
Yes. However any library routines that zlib uses and any application-
provided memory allocation routines must also be thread-safe. zlib's gz*
functions use stdio library routines, and most of zlib's functions use the
library memory allocation routines by default. zlib's *Init* functions
allow for the application to provide custom memory allocation routines.
Of course, you should only operate on any given zlib or gzip stream from a
single thread at a time.
22. Can I use zlib in my commercial application?
Yes. Please read the license in zlib.h.
23. Is zlib under the GNU license?
No. Please read the license in zlib.h.
24. The license says that altered source versions must be "plainly marked". So
what exactly do I need to do to meet that requirement?
You need to change the ZLIB_VERSION and ZLIB_VERNUM #defines in zlib.h. In
particular, the final version number needs to be changed to "f", and an
identification string should be appended to ZLIB_VERSION. Version numbers
x.x.x.f are reserved for modifications to zlib by others than the zlib
maintainers. For example, if the version of the base zlib you are altering
is "1.2.3.4", then in zlib.h you should change ZLIB_VERNUM to 0x123f, and
ZLIB_VERSION to something like "1.2.3.f-zachary-mods-v3". You can also
update the version strings in deflate.c and inftrees.c.
For altered source distributions, you should also note the origin and
nature of the changes in zlib.h, as well as in ChangeLog and README, along
with the dates of the alterations. The origin should include at least your
name (or your company's name), and an email address to contact for help or
issues with the library.
Note that distributing a compiled zlib library along with zlib.h and
zconf.h is also a source distribution, and so you should change
ZLIB_VERSION and ZLIB_VERNUM and note the origin and nature of the changes
in zlib.h as you would for a full source distribution.
25. Will zlib work on a big-endian or little-endian architecture, and can I
exchange compressed data between them?
Yes and yes.
26. Will zlib work on a 64-bit machine?
Yes. It has been tested on 64-bit machines, and has no dependence on any
data types being limited to 32-bits in length. If you have any
difficulties, please provide a complete problem report to zlib@gzip.org
27. Will zlib decompress data from the PKWare Data Compression Library?
No. The PKWare DCL uses a completely different compressed data format than
does PKZIP and zlib. However, you can look in zlib's contrib/blast
directory for a possible solution to your problem.
28. Can I access data randomly in a compressed stream?
No, not without some preparation. If when compressing you periodically use
Z_FULL_FLUSH, carefully write all the pending data at those points, and
keep an index of those locations, then you can start decompression at those
points. You have to be careful to not use Z_FULL_FLUSH too often, since it
can significantly degrade compression. Alternatively, you can scan a
deflate stream once to generate an index, and then use that index for
random access. See examples/zran.c .
29. Does zlib work on MVS, OS/390, CICS, etc.?
It has in the past, but we have not heard of any recent evidence. There
were working ports of zlib 1.1.4 to MVS, but those links no longer work.
If you know of recent, successful applications of zlib on these operating
systems, please let us know. Thanks.
30. Is there some simpler, easier to read version of inflate I can look at to
understand the deflate format?
First off, you should read RFC 1951. Second, yes. Look in zlib's
contrib/puff directory.
31. Does zlib infringe on any patents?
As far as we know, no. In fact, that was originally the whole point behind
zlib. Look here for some more information:
http://www.gzip.org/#faq11
32. Can zlib work with greater than 4 GB of data?
Yes. inflate() and deflate() will process any amount of data correctly.
Each call of inflate() or deflate() is limited to input and output chunks
of the maximum value that can be stored in the compiler's "unsigned int"
type, but there is no limit to the number of chunks. Note however that the
strm.total_in and strm_total_out counters may be limited to 4 GB. These
counters are provided as a convenience and are not used internally by
inflate() or deflate(). The application can easily set up its own counters
updated after each call of inflate() or deflate() to count beyond 4 GB.
compress() and uncompress() may be limited to 4 GB, since they operate in a
single call. gzseek() and gztell() may be limited to 4 GB depending on how
zlib is compiled. See the zlibCompileFlags() function in zlib.h.
The word "may" appears several times above since there is a 4 GB limit only
if the compiler's "long" type is 32 bits. If the compiler's "long" type is
64 bits, then the limit is 16 exabytes.
33. Does zlib have any security vulnerabilities?
The only one that we are aware of is potentially in gzprintf(). If zlib is
compiled to use sprintf() or vsprintf(), then there is no protection
against a buffer overflow of an 8K string space (or other value as set by
gzbuffer()), other than the caller of gzprintf() assuring that the output
will not exceed 8K. On the other hand, if zlib is compiled to use
snprintf() or vsnprintf(), which should normally be the case, then there is
no vulnerability. The ./configure script will display warnings if an
insecure variation of sprintf() will be used by gzprintf(). Also the
zlibCompileFlags() function will return information on what variant of
sprintf() is used by gzprintf().
If you don't have snprintf() or vsnprintf() and would like one, you can
find a portable implementation here:
http://www.ijs.si/software/snprintf/
Note that you should be using the most recent version of zlib. Versions
1.1.3 and before were subject to a double-free vulnerability, and versions
1.2.1 and 1.2.2 were subject to an access exception when decompressing
invalid compressed data.
34. Is there a Java version of zlib?
Probably what you want is to use zlib in Java. zlib is already included
as part of the Java SDK in the java.util.zip package. If you really want
a version of zlib written in the Java language, look on the zlib home
page for links: http://zlib.net/ .
35. I get this or that compiler or source-code scanner warning when I crank it
up to maximally-pedantic. Can't you guys write proper code?
Many years ago, we gave up attempting to avoid warnings on every compiler
in the universe. It just got to be a waste of time, and some compilers
were downright silly as well as contradicted each other. So now, we simply
make sure that the code always works.
36. Valgrind (or some similar memory access checker) says that deflate is
performing a conditional jump that depends on an uninitialized value.
Isn't that a bug?
No. That is intentional for performance reasons, and the output of deflate
is not affected. This only started showing up recently since zlib 1.2.x
uses malloc() by default for allocations, whereas earlier versions used
calloc(), which zeros out the allocated memory. Even though the code was
correct, versions 1.2.4 and later was changed to not stimulate these
checkers.
37. Will zlib read the (insert any ancient or arcane format here) compressed
data format?
Probably not. Look in the comp.compression FAQ for pointers to various
formats and associated software.
38. How can I encrypt/decrypt zip files with zlib?
zlib doesn't support encryption. The original PKZIP encryption is very
weak and can be broken with freely available programs. To get strong
encryption, use GnuPG, http://www.gnupg.org/ , which already includes zlib
compression. For PKZIP compatible "encryption", look at
http://www.info-zip.org/
39. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings?
"gzip" is the gzip format, and "deflate" is the zlib format. They should
probably have called the second one "zlib" instead to avoid confusion with
the raw deflate compressed data format. While the HTTP 1.1 RFC 2616
correctly points to the zlib specification in RFC 1950 for the "deflate"
transfer encoding, there have been reports of servers and browsers that
incorrectly produce or expect raw deflate data per the deflate
specification in RFC 1951, most notably Microsoft. So even though the
"deflate" transfer encoding using the zlib format would be the more
efficient approach (and in fact exactly what the zlib format was designed
for), using the "gzip" transfer encoding is probably more reliable due to
an unfortunate choice of name on the part of the HTTP 1.1 authors.
Bottom line: use the gzip format for HTTP 1.1 encoding.
40. Does zlib support the new "Deflate64" format introduced by PKWare?
No. PKWare has apparently decided to keep that format proprietary, since
they have not documented it as they have previous compression formats. In
any case, the compression improvements are so modest compared to other more
modern approaches, that it's not worth the effort to implement.
41. I'm having a problem with the zip functions in zlib, can you help?
There are no zip functions in zlib. You are probably using minizip by
Giles Vollant, which is found in the contrib directory of zlib. It is not
part of zlib. In fact none of the stuff in contrib is part of zlib. The
files in there are not supported by the zlib authors. You need to contact
the authors of the respective contribution for help.
42. The match.asm code in contrib is under the GNU General Public License.
Since it's part of zlib, doesn't that mean that all of zlib falls under the
GNU GPL?
No. The files in contrib are not part of zlib. They were contributed by
other authors and are provided as a convenience to the user within the zlib
distribution. Each item in contrib has its own license.
43. Is zlib subject to export controls? What is its ECCN?
zlib is not subject to export controls, and so is classified as EAR99.
44. Can you please sign these lengthy legal documents and fax them back to us
so that we can use your software in our product?
No. Go away. Shoo.

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CMakeLists.txt cmake build file
ChangeLog history of changes
FAQ Frequently Asked Questions about zlib
INDEX this file
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README guess what
configure configure script for Unix
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zlib.3.pdf Man page in PDF format
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as400/ makefiles for AS/400
doc/ documentation for formats and algorithms
msdos/ makefiles for MSDOS
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watcom/ makefiles for OpenWatcom
win32/ makefiles for Windows
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zconf.h
zlib.h
private source files used to build the zlib library:
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compress.c
crc32.c
crc32.h
deflate.c
deflate.h
gzclose.c
gzguts.h
gzlib.c
gzread.c
gzwrite.c
infback.c
inffast.c
inffast.h
inffixed.h
inflate.c
inflate.h
inftrees.c
inftrees.h
trees.c
trees.h
uncompr.c
zutil.c
zutil.h
source files for sample programs
See examples/README.examples
unsupported contributions by third parties
See contrib/README.contrib

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118
zlib/README Normal file
View file

@ -0,0 +1,118 @@
This directory contains the zlib package, which is not part of GCC but
shipped with GCC as convenience.
ZLIB DATA COMPRESSION LIBRARY
zlib 1.2.7 is a general purpose data compression library. All the code is
thread safe. The data format used by the zlib library is described by RFCs
(Request for Comments) 1950 to 1952 in the files
http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and
rfc1952 (gzip format).
All functions of the compression library are documented in the file zlib.h
(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
of the library is given in the file test/example.c which also tests that
the library is working correctly. Another example is given in the file
test/minigzip.c. The compression library itself is composed of all source
files in the root directory.
To compile all files and run the test program, follow the instructions given at
the top of Makefile.in. In short "./configure; make test", and if that goes
well, "make install" should work for most flavors of Unix. For Windows, use
one of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use
make_vms.com.
Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
<info@winimage.com> for the Windows DLL version. The zlib home page is
http://zlib.net/ . Before reporting a problem, please check this site to
verify that you have the latest version of zlib; otherwise get the latest
version and check whether the problem still exists or not.
PLEASE read the zlib FAQ http://zlib.net/zlib_faq.html before asking for help.
Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
issue of Dr. Dobb's Journal; a copy of the article is available at
http://marknelson.us/1997/01/01/zlib-engine/ .
The changes made in version 1.2.7 are documented in the file ChangeLog.
Unsupported third party contributions are provided in directory contrib/ .
zlib is available in Java using the java.util.zip package, documented at
http://java.sun.com/developer/technicalArticles/Programming/compression/ .
A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is available
at CPAN (Comprehensive Perl Archive Network) sites, including
http://search.cpan.org/~pmqs/IO-Compress-Zlib/ .
A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
available in Python 1.5 and later versions, see
http://docs.python.org/library/zlib.html .
zlib is built into tcl: http://wiki.tcl.tk/4610 .
An experimental package to read and write files in .zip format, written on top
of zlib by Gilles Vollant <info@winimage.com>, is available in the
contrib/minizip directory of zlib.
Notes for some targets:
- For Windows DLL versions, please see win32/DLL_FAQ.txt
- For 64-bit Irix, deflate.c must be compiled without any optimization. With
-O, one libpng test fails. The test works in 32 bit mode (with the -n32
compiler flag). The compiler bug has been reported to SGI.
- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
when compiled with cc.
- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
necessary to get gzprintf working correctly. This is done by configure.
- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
other compilers. Use "make test" to check your compiler.
- gzdopen is not supported on RISCOS or BEOS.
- For PalmOs, see http://palmzlib.sourceforge.net/
Acknowledgments:
The deflate format used by zlib was defined by Phil Katz. The deflate and
zlib specifications were written by L. Peter Deutsch. Thanks to all the
people who reported problems and suggested various improvements in zlib; they
are too numerous to cite here.
Copyright notice:
(C) 1995-2012 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jean-loup Gailly Mark Adler
jloup@gzip.org madler@alumni.caltech.edu
If you use the zlib library in a product, we would appreciate *not* receiving
lengthy legal documents to sign. The sources are provided for free but without
warranty of any kind. The library has been entirely written by Jean-loup
Gailly and Mark Adler; it does not include third-party code.
If you redistribute modified sources, we would appreciate that you include in
the file ChangeLog history information documenting your changes. Please read
the FAQ for more information on the distribution of modified source versions.

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/* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995-2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id: adler32.c,v 1.1.1.2 2002/03/11 21:53:23 tromey Exp $ */
#include "zutil.h"
#define local static
local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
#define BASE 65521 /* largest prime smaller than 65536 */
#define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
#define DO1(buf,i) {adler += (buf)[i]; sum2 += adler;}
#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
#define DO16(buf) DO8(buf,0); DO8(buf,8);
/* use NO_DIVIDE if your processor does not do division in hardware --
try it both ways to see which is faster */
#ifdef NO_DIVIDE
/* note that this assumes BASE is 65521, where 65536 % 65521 == 15
(thank you to John Reiser for pointing this out) */
# define CHOP(a) \
do { \
unsigned long tmp = a >> 16; \
a &= 0xffffUL; \
a += (tmp << 4) - tmp; \
} while (0)
# define MOD28(a) \
do { \
CHOP(a); \
if (a >= BASE) a -= BASE; \
} while (0)
# define MOD(a) \
do { \
CHOP(a); \
MOD28(a); \
} while (0)
# define MOD63(a) \
do { /* this assumes a is not negative */ \
z_off64_t tmp = a >> 32; \
a &= 0xffffffffL; \
a += (tmp << 8) - (tmp << 5) + tmp; \
tmp = a >> 16; \
a &= 0xffffL; \
a += (tmp << 4) - tmp; \
tmp = a >> 16; \
a &= 0xffffL; \
a += (tmp << 4) - tmp; \
if (a >= BASE) a -= BASE; \
} while (0)
#else
# define MOD(a) a %= BASE
# define MOD28(a) a %= BASE
# define MOD63(a) a %= BASE
#endif
/* ========================================================================= */
uLong ZEXPORT adler32(adler, buf, len)
uLong adler;
const Bytef *buf;
uInt len;
{
unsigned long sum2;
unsigned n;
/* split Adler-32 into component sums */
sum2 = (adler >> 16) & 0xffff;
adler &= 0xffff;
/* in case user likes doing a byte at a time, keep it fast */
if (len == 1) {
adler += buf[0];
if (adler >= BASE)
adler -= BASE;
sum2 += adler;
if (sum2 >= BASE)
sum2 -= BASE;
return adler | (sum2 << 16);
}
/* initial Adler-32 value (deferred check for len == 1 speed) */
if (buf == Z_NULL)
return 1L;
/* in case short lengths are provided, keep it somewhat fast */
if (len < 16) {
while (len--) {
adler += *buf++;
sum2 += adler;
}
if (adler >= BASE)
adler -= BASE;
MOD28(sum2); /* only added so many BASE's */
return adler | (sum2 << 16);
}
/* do length NMAX blocks -- requires just one modulo operation */
while (len >= NMAX) {
len -= NMAX;
n = NMAX / 16; /* NMAX is divisible by 16 */
do {
DO16(buf); /* 16 sums unrolled */
buf += 16;
} while (--n);
MOD(adler);
MOD(sum2);
}
/* do remaining bytes (less than NMAX, still just one modulo) */
if (len) { /* avoid modulos if none remaining */
while (len >= 16) {
len -= 16;
DO16(buf);
buf += 16;
}
while (len--) {
adler += *buf++;
sum2 += adler;
}
MOD(adler);
MOD(sum2);
}
/* return recombined sums */
return adler | (sum2 << 16);
}
/* ========================================================================= */
local uLong adler32_combine_(adler1, adler2, len2)
uLong adler1;
uLong adler2;
z_off64_t len2;
{
unsigned long sum1;
unsigned long sum2;
unsigned rem;
/* for negative len, return invalid adler32 as a clue for debugging */
if (len2 < 0)
return 0xffffffffUL;
/* the derivation of this formula is left as an exercise for the reader */
MOD63(len2); /* assumes len2 >= 0 */
rem = (unsigned)len2;
sum1 = adler1 & 0xffff;
sum2 = rem * sum1;
MOD(sum2);
sum1 += (adler2 & 0xffff) + BASE - 1;
sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
if (sum1 >= BASE) sum1 -= BASE;
if (sum1 >= BASE) sum1 -= BASE;
if (sum2 >= (BASE << 1)) sum2 -= (BASE << 1);
if (sum2 >= BASE) sum2 -= BASE;
return sum1 | (sum2 << 16);
}
/* ========================================================================= */
uLong ZEXPORT adler32_combine(adler1, adler2, len2)
uLong adler1;
uLong adler2;
z_off_t len2;
{
return adler32_combine_(adler1, adler2, len2);
}
uLong ZEXPORT adler32_combine64(adler1, adler2, len2)
uLong adler1;
uLong adler2;
z_off64_t len2;
{
return adler32_combine_(adler1, adler2, len2);
}

69
zlib/amiga/Makefile.pup Normal file
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# Amiga powerUP (TM) Makefile
# makefile for libpng and SAS C V6.58/7.00 PPC compiler
# Copyright (C) 1998 by Andreas R. Kleinert
LIBNAME = libzip.a
CC = scppc
CFLAGS = NOSTKCHK NOSINT OPTIMIZE OPTGO OPTPEEP OPTINLOCAL OPTINL \
OPTLOOP OPTRDEP=8 OPTDEP=8 OPTCOMP=8 NOVER
AR = ppc-amigaos-ar cr
RANLIB = ppc-amigaos-ranlib
LD = ppc-amigaos-ld -r
LDFLAGS = -o
LDLIBS = LIB:scppc.a LIB:end.o
RM = delete quiet
OBJS = adler32.o compress.o crc32.o gzclose.o gzlib.o gzread.o gzwrite.o \
uncompr.o deflate.o trees.o zutil.o inflate.o infback.o inftrees.o inffast.o
TEST_OBJS = example.o minigzip.o
all: example minigzip
check: test
test: all
example
echo hello world | minigzip | minigzip -d
$(LIBNAME): $(OBJS)
$(AR) $@ $(OBJS)
-$(RANLIB) $@
example: example.o $(LIBNAME)
$(LD) $(LDFLAGS) $@ LIB:c_ppc.o $@.o $(LIBNAME) $(LDLIBS)
minigzip: minigzip.o $(LIBNAME)
$(LD) $(LDFLAGS) $@ LIB:c_ppc.o $@.o $(LIBNAME) $(LDLIBS)
mostlyclean: clean
clean:
$(RM) *.o example minigzip $(LIBNAME) foo.gz
zip:
zip -ul9 zlib README ChangeLog Makefile Make????.??? Makefile.?? \
descrip.mms *.[ch]
tgz:
cd ..; tar cfz zlib/zlib.tgz zlib/README zlib/ChangeLog zlib/Makefile \
zlib/Make????.??? zlib/Makefile.?? zlib/descrip.mms zlib/*.[ch]
# DO NOT DELETE THIS LINE -- make depend depends on it.
adler32.o: zlib.h zconf.h
compress.o: zlib.h zconf.h
crc32.o: crc32.h zlib.h zconf.h
deflate.o: deflate.h zutil.h zlib.h zconf.h
example.o: zlib.h zconf.h
gzclose.o: zlib.h zconf.h gzguts.h
gzlib.o: zlib.h zconf.h gzguts.h
gzread.o: zlib.h zconf.h gzguts.h
gzwrite.o: zlib.h zconf.h gzguts.h
inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inftrees.o: zutil.h zlib.h zconf.h inftrees.h
minigzip.o: zlib.h zconf.h
trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
uncompr.o: zlib.h zconf.h
zutil.o: zutil.h zlib.h zconf.h

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# SMakefile for zlib
# Modified from the standard UNIX Makefile Copyright Jean-loup Gailly
# Osma Ahvenlampi <Osma.Ahvenlampi@hut.fi>
# Amiga, SAS/C 6.56 & Smake
CC=sc
CFLAGS=OPT
#CFLAGS=OPT CPU=68030
#CFLAGS=DEBUG=LINE
LDFLAGS=LIB z.lib
SCOPTIONS=OPTSCHED OPTINLINE OPTALIAS OPTTIME OPTINLOCAL STRMERGE \
NOICONS PARMS=BOTH NOSTACKCHECK UTILLIB NOVERSION ERRORREXX \
DEF=POSTINC
OBJS = adler32.o compress.o crc32.o gzclose.o gzlib.o gzread.o gzwrite.o \
uncompr.o deflate.o trees.o zutil.o inflate.o infback.o inftrees.o inffast.o
TEST_OBJS = example.o minigzip.o
all: SCOPTIONS example minigzip
check: test
test: all
example
echo hello world | minigzip | minigzip -d
install: z.lib
copy clone zlib.h zconf.h INCLUDE:
copy clone z.lib LIB:
z.lib: $(OBJS)
oml z.lib r $(OBJS)
example: example.o z.lib
$(CC) $(CFLAGS) LINK TO $@ example.o $(LDFLAGS)
minigzip: minigzip.o z.lib
$(CC) $(CFLAGS) LINK TO $@ minigzip.o $(LDFLAGS)
mostlyclean: clean
clean:
-delete force quiet example minigzip *.o z.lib foo.gz *.lnk SCOPTIONS
SCOPTIONS: Makefile.sas
copy to $@ <from <
$(SCOPTIONS)
<
# DO NOT DELETE THIS LINE -- make depend depends on it.
adler32.o: zlib.h zconf.h
compress.o: zlib.h zconf.h
crc32.o: crc32.h zlib.h zconf.h
deflate.o: deflate.h zutil.h zlib.h zconf.h
example.o: zlib.h zconf.h
gzclose.o: zlib.h zconf.h gzguts.h
gzlib.o: zlib.h zconf.h gzguts.h
gzread.o: zlib.h zconf.h gzguts.h
gzwrite.o: zlib.h zconf.h gzguts.h
inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inftrees.o: zutil.h zlib.h zconf.h inftrees.h
minigzip.o: zlib.h zconf.h
trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
uncompr.o: zlib.h zconf.h
zutil.o: zutil.h zlib.h zconf.h

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STRPGMEXP PGMLVL(*CURRENT) SIGNATURE('ZLIB')
/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
/* Version 1.1.3 entry points. */
/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
/********************************************************************/
/* *MODULE ADLER32 ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("adler32")
/********************************************************************/
/* *MODULE COMPRESS ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("compress")
EXPORT SYMBOL("compress2")
/********************************************************************/
/* *MODULE CRC32 ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("crc32")
EXPORT SYMBOL("get_crc_table")
/********************************************************************/
/* *MODULE DEFLATE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("deflate")
EXPORT SYMBOL("deflateEnd")
EXPORT SYMBOL("deflateSetDictionary")
EXPORT SYMBOL("deflateCopy")
EXPORT SYMBOL("deflateReset")
EXPORT SYMBOL("deflateParams")
EXPORT SYMBOL("deflatePrime")
EXPORT SYMBOL("deflateInit_")
EXPORT SYMBOL("deflateInit2_")
/********************************************************************/
/* *MODULE GZIO ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("gzopen")
EXPORT SYMBOL("gzdopen")
EXPORT SYMBOL("gzsetparams")
EXPORT SYMBOL("gzread")
EXPORT SYMBOL("gzwrite")
EXPORT SYMBOL("gzprintf")
EXPORT SYMBOL("gzputs")
EXPORT SYMBOL("gzgets")
EXPORT SYMBOL("gzputc")
EXPORT SYMBOL("gzgetc")
EXPORT SYMBOL("gzflush")
EXPORT SYMBOL("gzseek")
EXPORT SYMBOL("gzrewind")
EXPORT SYMBOL("gztell")
EXPORT SYMBOL("gzeof")
EXPORT SYMBOL("gzclose")
EXPORT SYMBOL("gzerror")
/********************************************************************/
/* *MODULE INFLATE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("inflate")
EXPORT SYMBOL("inflateEnd")
EXPORT SYMBOL("inflateSetDictionary")
EXPORT SYMBOL("inflateSync")
EXPORT SYMBOL("inflateReset")
EXPORT SYMBOL("inflateInit_")
EXPORT SYMBOL("inflateInit2_")
EXPORT SYMBOL("inflateSyncPoint")
/********************************************************************/
/* *MODULE UNCOMPR ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("uncompress")
/********************************************************************/
/* *MODULE ZUTIL ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("zlibVersion")
EXPORT SYMBOL("zError")
/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
/* Version 1.2.1 additional entry points. */
/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
/********************************************************************/
/* *MODULE COMPRESS ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("compressBound")
/********************************************************************/
/* *MODULE DEFLATE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("deflateBound")
/********************************************************************/
/* *MODULE GZIO ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("gzungetc")
EXPORT SYMBOL("gzclearerr")
/********************************************************************/
/* *MODULE INFBACK ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("inflateBack")
EXPORT SYMBOL("inflateBackEnd")
EXPORT SYMBOL("inflateBackInit_")
/********************************************************************/
/* *MODULE INFLATE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("inflateCopy")
/********************************************************************/
/* *MODULE ZUTIL ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("zlibCompileFlags")
/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
/* Version 1.2.5 additional entry points. */
/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
/********************************************************************/
/* *MODULE ADLER32 ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("adler32_combine")
EXPORT SYMBOL("adler32_combine64")
/********************************************************************/
/* *MODULE CRC32 ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("crc32_combine")
EXPORT SYMBOL("crc32_combine64")
/********************************************************************/
/* *MODULE GZLIB ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("gzbuffer")
EXPORT SYMBOL("gzoffset")
EXPORT SYMBOL("gzoffset64")
EXPORT SYMBOL("gzopen64")
EXPORT SYMBOL("gzseek64")
EXPORT SYMBOL("gztell64")
/********************************************************************/
/* *MODULE GZREAD ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("gzclose_r")
/********************************************************************/
/* *MODULE GZWRITE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("gzclose_w")
/********************************************************************/
/* *MODULE INFLATE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("inflateMark")
EXPORT SYMBOL("inflatePrime")
EXPORT SYMBOL("inflateReset2")
EXPORT SYMBOL("inflateUndermine")
/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
/* Version 1.2.6 additional entry points. */
/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
/********************************************************************/
/* *MODULE DEFLATE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("deflateResetKeep")
EXPORT SYMBOL("deflatePending")
/********************************************************************/
/* *MODULE GZWRITE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("gzgetc_")
/********************************************************************/
/* *MODULE INFLATE ZLIB 01/02/01 00:15:09 */
/********************************************************************/
EXPORT SYMBOL("inflateResetKeep")
ENDPGMEXP

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/******************************************************************************/
/* */
/* ZLIB */
/* */
/* Compile sources into modules and link them into a service program. */
/* */
/******************************************************************************/
PGM
/* Configuration adjustable parameters. */
DCL VAR(&SRCLIB) TYPE(*CHAR) LEN(10) +
VALUE('ZLIB') /* Source library. */
DCL VAR(&SRCFILE) TYPE(*CHAR) LEN(10) +
VALUE('SOURCES') /* Source member file. */
DCL VAR(&CTLFILE) TYPE(*CHAR) LEN(10) +
VALUE('TOOLS') /* Control member file. */
DCL VAR(&MODLIB) TYPE(*CHAR) LEN(10) +
VALUE('ZLIB') /* Module library. */
DCL VAR(&SRVLIB) TYPE(*CHAR) LEN(10) +
VALUE('LGPL') /* Service program library. */
DCL VAR(&CFLAGS) TYPE(*CHAR) +
VALUE('OPTIMIZE(40)') /* Compile options. */
DCL VAR(&TGTRLS) TYPE(*CHAR) +
VALUE('V5R3M0') /* Target release. */
/* Working storage. */
DCL VAR(&CMDLEN) TYPE(*DEC) LEN(15 5) VALUE(300) /* Command length. */
DCL VAR(&CMD) TYPE(*CHAR) LEN(512)
DCL VAR(&FIXDCMD) TYPE(*CHAR) LEN(512)
/* Compile sources into modules. */
CHGVAR VAR(&FIXDCMD) VALUE('CRTCMOD' *BCAT &CFLAGS *BCAT +
'SYSIFCOPT(*IFS64IO)' *BCAT +
'DEFINE(''_LARGEFILE64_SOURCE''' *BCAT +
'''_LFS64_LARGEFILE=1'') TGTRLS(' *TCAT &TGTRLS *TCAT +
') SRCFILE(' *TCAT &SRCLIB *TCAT '/' *TCAT +
&SRCFILE *TCAT ') MODULE(' *TCAT &MODLIB *TCAT '/')
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'ADLER32)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'COMPRESS)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'CRC32)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'DEFLATE)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZCLOSE)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZLIB)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZREAD)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZWRITE)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFBACK)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFFAST)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFLATE)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFTREES)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'TREES)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'UNCOMPR)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
CHGVAR VAR(&CMD) VALUE(&FIXDCMD *TCAT 'ZUTIL)')
CALL PGM(QCMDEXC) PARM(&CMD &CMDLEN)
/* Link modules into a service program. */
CRTSRVPGM SRVPGM(&SRVLIB/ZLIB) +
MODULE(&MODLIB/ADLER32 &MODLIB/COMPRESS +
&MODLIB/CRC32 &MODLIB/DEFLATE +
&MODLIB/GZCLOSE &MODLIB/GZLIB +
&MODLIB/GZREAD &MODLIB/GZWRITE +
&MODLIB/INFBACK &MODLIB/INFFAST +
&MODLIB/INFLATE &MODLIB/INFTREES +
&MODLIB/TREES &MODLIB/UNCOMPR +
&MODLIB/ZUTIL) +
SRCFILE(&SRCLIB/&CTLFILE) SRCMBR(BNDSRC) +
TEXT('ZLIB 1.2.7') TGTRLS(&TGTRLS)
ENDPGM

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ZLIB version 1.2.7 for AS400 installation instructions
I) From an AS400 *SAVF file:
1) Unpacking archive to an AS400 save file
On the AS400:
_ Create the ZLIB AS400 library:
CRTLIB LIB(ZLIB) TYPE(*PROD) TEXT('ZLIB compression API library')
_ Create a work save file, for example:
CRTSAVF FILE(ZLIB/ZLIBSAVF)
On a PC connected to the target AS400:
_ Unpack the save file image to a PC file "ZLIBSAVF"
_ Upload this file into the save file on the AS400, for example
using ftp in BINARY mode.
2) Populating the ZLIB AS400 source library
On the AS400:
_ Extract the saved objects into the ZLIB AS400 library using:
RSTOBJ OBJ(*ALL) SAVLIB(ZLIB) DEV(*SAVF) SAVF(ZLIB/ZLIBSAVF) RSTLIB(ZLIB)
3) Customize installation:
_ Edit CL member ZLIB/TOOLS(COMPILE) and change parameters if needed,
according to the comments.
_ Compile this member with:
CRTCLPGM PGM(ZLIB/COMPILE) SRCFILE(ZLIB/TOOLS) SRCMBR(COMPILE)
4) Compile and generate the service program:
_ This can now be done by executing:
CALL PGM(ZLIB/COMPILE)
II) From the original source distribution:
1) On the AS400, create the source library:
CRTLIB LIB(ZLIB) TYPE(*PROD) TEXT('ZLIB compression API library')
2) Create the source files:
CRTSRCPF FILE(ZLIB/SOURCES) RCDLEN(112) TEXT('ZLIB library modules')
CRTSRCPF FILE(ZLIB/H) RCDLEN(112) TEXT('ZLIB library includes')
CRTSRCPF FILE(ZLIB/TOOLS) RCDLEN(112) TEXT('ZLIB library control utilities')
3) From the machine hosting the distribution files, upload them (with
FTP in text mode, for example) according to the following table:
Original AS400 AS400 AS400 AS400
file file member type description
SOURCES Original ZLIB C subprogram sources
adler32.c ADLER32 C ZLIB - Compute the Adler-32 checksum of a dta strm
compress.c COMPRESS C ZLIB - Compress a memory buffer
crc32.c CRC32 C ZLIB - Compute the CRC-32 of a data stream
deflate.c DEFLATE C ZLIB - Compress data using the deflation algorithm
gzclose.c GZCLOSE C ZLIB - Close .gz files
gzlib.c GZLIB C ZLIB - Miscellaneous .gz files IO support
gzread.c GZREAD C ZLIB - Read .gz files
gzwrite.c GZWRITE C ZLIB - Write .gz files
infback.c INFBACK C ZLIB - Inflate using a callback interface
inffast.c INFFAST C ZLIB - Fast proc. literals & length/distance pairs
inflate.c INFLATE C ZLIB - Interface to inflate modules
inftrees.c INFTREES C ZLIB - Generate Huffman trees for efficient decode
trees.c TREES C ZLIB - Output deflated data using Huffman coding
uncompr.c UNCOMPR C ZLIB - Decompress a memory buffer
zutil.c ZUTIL C ZLIB - Target dependent utility functions
H Original ZLIB C and ILE/RPG include files
crc32.h CRC32 C ZLIB - CRC32 tables
deflate.h DEFLATE C ZLIB - Internal compression state
gzguts.h GZGUTS C ZLIB - Definitions for the gzclose module
inffast.h INFFAST C ZLIB - Header to use inffast.c
inffixed.h INFFIXED C ZLIB - Table for decoding fixed codes
inflate.h INFLATE C ZLIB - Internal inflate state definitions
inftrees.h INFTREES C ZLIB - Header to use inftrees.c
trees.h TREES C ZLIB - Created automatically with -DGEN_TREES_H
zconf.h ZCONF C ZLIB - Compression library configuration
zlib.h ZLIB C ZLIB - Compression library C user interface
as400/zlib.inc ZLIB.INC RPGLE ZLIB - Compression library ILE RPG user interface
zutil.h ZUTIL C ZLIB - Internal interface and configuration
TOOLS Building source software & AS/400 README
as400/bndsrc BNDSRC Entry point exportation list
as400/compile.clp COMPILE CLP Compile sources & generate service program
as400/readme.txt README TXT Installation instructions
4) Continue as in I)3).
Notes: For AS400 ILE RPG programmers, a /copy member defining the ZLIB
API prototypes for ILE RPG can be found in ZLIB/H(ZLIB.INC).
Please read comments in this member for more information.
Remember that most foreign textual data are ASCII coded: this
implementation does not handle conversion from/to ASCII, so
text data code conversions must be done explicitely.
Mainly for the reason above, always open zipped files in binary mode.

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* ZLIB.INC - Interface to the general purpose compression library
*
* ILE RPG400 version by Patrick Monnerat, DATASPHERE.
* Version 1.2.7
*
*
* WARNING:
* Procedures inflateInit(), inflateInit2(), deflateInit(),
* deflateInit2() and inflateBackInit() need to be called with
* two additional arguments:
* the package version string and the stream control structure.
* size. This is needed because RPG lacks some macro feature.
* Call these procedures as:
* inflateInit(...: ZLIB_VERSION: %size(z_stream))
*
/if not defined(ZLIB_H_)
/define ZLIB_H_
*
**************************************************************************
* Constants
**************************************************************************
*
* Versioning information.
*
D ZLIB_VERSION C '1.2.7'
D ZLIB_VERNUM C X'1270'
D ZLIB_VER_MAJOR C 1
D ZLIB_VER_MINOR C 2
D ZLIB_VER_REVISION...
D C 7
D ZLIB_VER_SUBREVISION...
D C 0
*
* Other equates.
*
D Z_NO_FLUSH C 0
D Z_PARTIAL_FLUSH...
D C 1
D Z_SYNC_FLUSH C 2
D Z_FULL_FLUSH C 3
D Z_FINISH C 4
D Z_BLOCK C 5
D Z_TREES C 6
*
D Z_OK C 0
D Z_STREAM_END C 1
D Z_NEED_DICT C 2
D Z_ERRNO C -1
D Z_STREAM_ERROR C -2
D Z_DATA_ERROR C -3
D Z_MEM_ERROR C -4
D Z_BUF_ERROR C -5
DZ_VERSION_ERROR C -6
*
D Z_NO_COMPRESSION...
D C 0
D Z_BEST_SPEED C 1
D Z_BEST_COMPRESSION...
D C 9
D Z_DEFAULT_COMPRESSION...
D C -1
*
D Z_FILTERED C 1
D Z_HUFFMAN_ONLY C 2
D Z_RLE C 3
D Z_DEFAULT_STRATEGY...
D C 0
*
D Z_BINARY C 0
D Z_ASCII C 1
D Z_UNKNOWN C 2
*
D Z_DEFLATED C 8
*
D Z_NULL C 0
*
**************************************************************************
* Types
**************************************************************************
*
D z_streamp S * Stream struct ptr
D gzFile S * File pointer
D z_off_t S 10i 0 Stream offsets
D z_off64_t S 20i 0 Stream offsets
*
**************************************************************************
* Structures
**************************************************************************
*
* The GZIP encode/decode stream support structure.
*
D z_stream DS align based(z_streamp)
D zs_next_in * Next input byte
D zs_avail_in 10U 0 Byte cnt at next_in
D zs_total_in 10U 0 Total bytes read
D zs_next_out * Output buffer ptr
D zs_avail_out 10U 0 Room left @ next_out
D zs_total_out 10U 0 Total bytes written
D zs_msg * Last errmsg or null
D zs_state * Internal state
D zs_zalloc * procptr Int. state allocator
D zs_free * procptr Int. state dealloc.
D zs_opaque * Private alloc. data
D zs_data_type 10i 0 ASC/BIN best guess
D zs_adler 10u 0 Uncompr. adler32 val
D 10U 0 Reserved
D 10U 0 Ptr. alignment
*
**************************************************************************
* Utility function prototypes
**************************************************************************
*
D compress PR 10I 0 extproc('compress')
D dest 65535 options(*varsize) Destination buffer
D destLen 10U 0 Destination length
D source 65535 const options(*varsize) Source buffer
D sourceLen 10u 0 value Source length
*
D compress2 PR 10I 0 extproc('compress2')
D dest 65535 options(*varsize) Destination buffer
D destLen 10U 0 Destination length
D source 65535 const options(*varsize) Source buffer
D sourceLen 10U 0 value Source length
D level 10I 0 value Compression level
*
D compressBound PR 10U 0 extproc('compressBound')
D sourceLen 10U 0 value
*
D uncompress PR 10I 0 extproc('uncompress')
D dest 65535 options(*varsize) Destination buffer
D destLen 10U 0 Destination length
D source 65535 const options(*varsize) Source buffer
D sourceLen 10U 0 value Source length
*
/if not defined(LARGE_FILES)
D gzopen PR extproc('gzopen')
D like(gzFile)
D path * value options(*string) File pathname
D mode * value options(*string) Open mode
/else
D gzopen PR extproc('gzopen64')
D like(gzFile)
D path * value options(*string) File pathname
D mode * value options(*string) Open mode
*
D gzopen64 PR extproc('gzopen64')
D like(gzFile)
D path * value options(*string) File pathname
D mode * value options(*string) Open mode
/endif
*
D gzdopen PR extproc('gzdopen')
D like(gzFile)
D fd 10I 0 value File descriptor
D mode * value options(*string) Open mode
*
D gzbuffer PR 10I 0 extproc('gzbuffer')
D file value like(gzFile) File pointer
D size 10U 0 value
*
D gzsetparams PR 10I 0 extproc('gzsetparams')
D file value like(gzFile) File pointer
D level 10I 0 value
D strategy 10I 0 value
*
D gzread PR 10I 0 extproc('gzread')
D file value like(gzFile) File pointer
D buf 65535 options(*varsize) Buffer
D len 10u 0 value Buffer length
*
D gzwrite PR 10I 0 extproc('gzwrite')
D file value like(gzFile) File pointer
D buf 65535 const options(*varsize) Buffer
D len 10u 0 value Buffer length
*
D gzputs PR 10I 0 extproc('gzputs')
D file value like(gzFile) File pointer
D s * value options(*string) String to output
*
D gzgets PR * extproc('gzgets')
D file value like(gzFile) File pointer
D buf 65535 options(*varsize) Read buffer
D len 10i 0 value Buffer length
*
D gzputc PR 10i 0 extproc('gzputc')
D file value like(gzFile) File pointer
D c 10I 0 value Character to write
*
D gzgetc PR 10i 0 extproc('gzgetc')
D file value like(gzFile) File pointer
*
D gzgetc_ PR 10i 0 extproc('gzgetc_')
D file value like(gzFile) File pointer
*
D gzungetc PR 10i 0 extproc('gzungetc')
D c 10I 0 value Character to push
D file value like(gzFile) File pointer
*
D gzflush PR 10i 0 extproc('gzflush')
D file value like(gzFile) File pointer
D flush 10I 0 value Type of flush
*
/if not defined(LARGE_FILES)
D gzseek PR extproc('gzseek')
D like(z_off_t)
D file value like(gzFile) File pointer
D offset value like(z_off_t) Offset
D whence 10i 0 value Origin
/else
D gzseek PR extproc('gzseek64')
D like(z_off_t)
D file value like(gzFile) File pointer
D offset value like(z_off_t) Offset
D whence 10i 0 value Origin
*
D gzseek64 PR extproc('gzseek64')
D like(z_off64_t)
D file value like(gzFile) File pointer
D offset value like(z_off64_t) Offset
D whence 10i 0 value Origin
/endif
*
D gzrewind PR 10i 0 extproc('gzrewind')
D file value like(gzFile) File pointer
*
/if not defined(LARGE_FILES)
D gztell PR extproc('gztell')
D like(z_off_t)
D file value like(gzFile) File pointer
/else
D gztell PR extproc('gztell64')
D like(z_off_t)
D file value like(gzFile) File pointer
*
D gztell64 PR extproc('gztell64')
D like(z_off64_t)
D file value like(gzFile) File pointer
/endif
*
/if not defined(LARGE_FILES)
D gzoffset PR extproc('gzoffset')
D like(z_off_t)
D file value like(gzFile) File pointer
/else
D gzoffset PR extproc('gzoffset64')
D like(z_off_t)
D file value like(gzFile) File pointer
*
D gzoffset64 PR extproc('gzoffset64')
D like(z_off64_t)
D file value like(gzFile) File pointer
/endif
*
D gzeof PR 10i 0 extproc('gzeof')
D file value like(gzFile) File pointer
*
D gzclose_r PR 10i 0 extproc('gzclose_r')
D file value like(gzFile) File pointer
*
D gzclose_w PR 10i 0 extproc('gzclose_w')
D file value like(gzFile) File pointer
*
D gzclose PR 10i 0 extproc('gzclose')
D file value like(gzFile) File pointer
*
D gzerror PR * extproc('gzerror') Error string
D file value like(gzFile) File pointer
D errnum 10I 0 Error code
*
D gzclearerr PR extproc('gzclearerr')
D file value like(gzFile) File pointer
*
**************************************************************************
* Basic function prototypes
**************************************************************************
*
D zlibVersion PR * extproc('zlibVersion') Version string
*
D deflateInit PR 10I 0 extproc('deflateInit_') Init. compression
D strm like(z_stream) Compression stream
D level 10I 0 value Compression level
D version * value options(*string) Version string
D stream_size 10i 0 value Stream struct. size
*
D deflate PR 10I 0 extproc('deflate') Compress data
D strm like(z_stream) Compression stream
D flush 10I 0 value Flush type required
*
D deflateEnd PR 10I 0 extproc('deflateEnd') Termin. compression
D strm like(z_stream) Compression stream
*
D inflateInit PR 10I 0 extproc('inflateInit_') Init. expansion
D strm like(z_stream) Expansion stream
D version * value options(*string) Version string
D stream_size 10i 0 value Stream struct. size
*
D inflate PR 10I 0 extproc('inflate') Expand data
D strm like(z_stream) Expansion stream
D flush 10I 0 value Flush type required
*
D inflateEnd PR 10I 0 extproc('inflateEnd') Termin. expansion
D strm like(z_stream) Expansion stream
*
**************************************************************************
* Advanced function prototypes
**************************************************************************
*
D deflateInit2 PR 10I 0 extproc('deflateInit2_') Init. compression
D strm like(z_stream) Compression stream
D level 10I 0 value Compression level
D method 10I 0 value Compression method
D windowBits 10I 0 value log2(window size)
D memLevel 10I 0 value Mem/cmpress tradeoff
D strategy 10I 0 value Compression stategy
D version * value options(*string) Version string
D stream_size 10i 0 value Stream struct. size
*
D deflateSetDictionary...
D PR 10I 0 extproc('deflateSetDictionary') Init. dictionary
D strm like(z_stream) Compression stream
D dictionary 65535 const options(*varsize) Dictionary bytes
D dictLength 10U 0 value Dictionary length
*
D deflateCopy PR 10I 0 extproc('deflateCopy') Compress strm 2 strm
D dest like(z_stream) Destination stream
D source like(z_stream) Source stream
*
D deflateReset PR 10I 0 extproc('deflateReset') End and init. stream
D strm like(z_stream) Compression stream
*
D deflateParams PR 10I 0 extproc('deflateParams') Change level & strat
D strm like(z_stream) Compression stream
D level 10I 0 value Compression level
D strategy 10I 0 value Compression stategy
*
D deflateBound PR 10U 0 extproc('deflateBound') Change level & strat
D strm like(z_stream) Compression stream
D sourcelen 10U 0 value Compression level
*
D deflatePending PR 10I 0 extproc('deflatePending') Change level & strat
D strm like(z_stream) Compression stream
D pending 10U 0 Pending bytes
D bits 10I 0 Pending bits
*
D deflatePrime PR 10I 0 extproc('deflatePrime') Change level & strat
D strm like(z_stream) Compression stream
D bits 10I 0 value # of bits to insert
D value 10I 0 value Bits to insert
*
D inflateInit2 PR 10I 0 extproc('inflateInit2_') Init. expansion
D strm like(z_stream) Expansion stream
D windowBits 10I 0 value log2(window size)
D version * value options(*string) Version string
D stream_size 10i 0 value Stream struct. size
*
D inflateSetDictionary...
D PR 10I 0 extproc('inflateSetDictionary') Init. dictionary
D strm like(z_stream) Expansion stream
D dictionary 65535 const options(*varsize) Dictionary bytes
D dictLength 10U 0 value Dictionary length
*
D inflateSync PR 10I 0 extproc('inflateSync') Sync. expansion
D strm like(z_stream) Expansion stream
*
D inflateCopy PR 10I 0 extproc('inflateCopy')
D dest like(z_stream) Destination stream
D source like(z_stream) Source stream
*
D inflateReset PR 10I 0 extproc('inflateReset') End and init. stream
D strm like(z_stream) Expansion stream
*
D inflateReset2 PR 10I 0 extproc('inflateReset2') End and init. stream
D strm like(z_stream) Expansion stream
D windowBits 10I 0 value Log2(buffer size)
*
D inflatePrime PR 10I 0 extproc('inflatePrime') Insert bits
D strm like(z_stream) Expansion stream
D bits 10I 0 value Bit count
D value 10I 0 value Bits to insert
*
D inflateMark PR 10I 0 extproc('inflateMark') Get inflate info
D strm like(z_stream) Expansion stream
*
D inflateBackInit...
D PR 10I 0 extproc('inflateBackInit_')
D strm like(z_stream) Expansion stream
D windowBits 10I 0 value Log2(buffer size)
D window 65535 options(*varsize) Buffer
D version * value options(*string) Version string
D stream_size 10i 0 value Stream struct. size
*
D inflateBack PR 10I 0 extproc('inflateBack')
D strm like(z_stream) Expansion stream
D in * value procptr Input function
D in_desc * value Input descriptor
D out * value procptr Output function
D out_desc * value Output descriptor
*
D inflateBackEnd PR 10I 0 extproc('inflateBackEnd')
D strm like(z_stream) Expansion stream
*
D zlibCompileFlags...
D PR 10U 0 extproc('zlibCompileFlags')
*
**************************************************************************
* Checksum function prototypes
**************************************************************************
*
D adler32 PR 10U 0 extproc('adler32') New checksum
D adler 10U 0 value Old checksum
D buf 65535 const options(*varsize) Bytes to accumulate
D len 10U 0 value Buffer length
*
D crc32 PR 10U 0 extproc('crc32') New checksum
D crc 10U 0 value Old checksum
D buf 65535 const options(*varsize) Bytes to accumulate
D len 10U 0 value Buffer length
*
**************************************************************************
* Miscellaneous function prototypes
**************************************************************************
*
D zError PR * extproc('zError') Error string
D err 10I 0 value Error code
*
D inflateSyncPoint...
D PR 10I 0 extproc('inflateSyncPoint')
D strm like(z_stream) Expansion stream
*
D get_crc_table PR * extproc('get_crc_table') Ptr to ulongs
*
D inflateUndermine...
D PR 10I 0 extproc('inflateUndermine')
D strm like(z_stream) Expansion stream
D arg 10I 0 value Error code
*
D inflateResetKeep...
D PR 10I 0 extproc('inflateResetKeep') End and init. stream
D strm like(z_stream) Expansion stream
*
D deflateResetKeep...
D PR 10I 0 extproc('deflateResetKeep') End and init. stream
D strm like(z_stream) Expansion stream
*
/endif

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/* compress.c -- compress a memory buffer
* Copyright (C) 1995-2005 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id: compress.c,v 1.1.1.2 2002/03/11 21:53:23 tromey Exp $ */
#define ZLIB_INTERNAL
#include "zlib.h"
/* ===========================================================================
Compresses the source buffer into the destination buffer. The level
parameter has the same meaning as in deflateInit. sourceLen is the byte
length of the source buffer. Upon entry, destLen is the total size of the
destination buffer, which must be at least 0.1% larger than sourceLen plus
12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_BUF_ERROR if there was not enough room in the output buffer,
Z_STREAM_ERROR if the level parameter is invalid.
*/
int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
Bytef *dest;
uLongf *destLen;
const Bytef *source;
uLong sourceLen;
int level;
{
z_stream stream;
int err;
stream.next_in = (Bytef*)source;
stream.avail_in = (uInt)sourceLen;
#ifdef MAXSEG_64K
/* Check for source > 64K on 16-bit machine: */
if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
#endif
stream.next_out = dest;
stream.avail_out = (uInt)*destLen;
if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0;
stream.opaque = (voidpf)0;
err = deflateInit(&stream, level);
if (err != Z_OK) return err;
err = deflate(&stream, Z_FINISH);
if (err != Z_STREAM_END) {
deflateEnd(&stream);
return err == Z_OK ? Z_BUF_ERROR : err;
}
*destLen = stream.total_out;
err = deflateEnd(&stream);
return err;
}
/* ===========================================================================
*/
int ZEXPORT compress (dest, destLen, source, sourceLen)
Bytef *dest;
uLongf *destLen;
const Bytef *source;
uLong sourceLen;
{
return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
}
/* ===========================================================================
If the default memLevel or windowBits for deflateInit() is changed, then
this function needs to be updated.
*/
uLong ZEXPORT compressBound (sourceLen)
uLong sourceLen;
{
return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
(sourceLen >> 25) + 13;
}

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zlib/configure.ac Normal file
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dnl Process this with autoconf to create configure
AC_PREREQ(2.64)
AC_INIT
AC_CONFIG_SRCDIR([zlib.h])
AM_ENABLE_MULTILIB(, ..)
AC_CANONICAL_SYSTEM
# This works around an automake problem.
mkinstalldirs="`cd $ac_aux_dir && ${PWDCMD-pwd}`/mkinstalldirs"
AC_SUBST(mkinstalldirs)
AM_INIT_AUTOMAKE(zlib, 1.1.4)
AM_MAINTAINER_MODE
dnl We use these options to decide which functions to include.
AC_ARG_WITH(target-subdir,
[ --with-target-subdir=SUBDIR
configuring in a subdirectory])
if test -z "$with_target_subdir" || test "$with_target_subdir" = "."; then
COMPPATH=.
else
COMPPATH=..
fi
AC_SUBST(COMPPATH)
AC_ARG_WITH(cross-host,
[ --with-cross-host=HOST configuring with a cross compiler])
dnl Default to --enable-multilib
AC_ARG_ENABLE(multilib,
[ --enable-multilib build many library versions (default)],
[case "${enableval}" in
yes) multilib=yes ;;
no) multilib=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
esac], [test -z "$with_target_subdir" && multilib=no || multilib=yes])dnl
AC_ARG_WITH(system-zlib,
[ --with-system-zlib use installed libz])
# Make sure we don't test executables when making cross-tools.
GCC_NO_EXECUTABLES
# The same as in boehm-gc and libstdc++. Have to borrow it from there.
# We must force CC to /not/ be precious variables; otherwise
# the wrong, non-multilib-adjusted value will be used in multilibs.
# As a side effect, we have to subst CFLAGS ourselves.
m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
m4_define([_AC_ARG_VAR_PRECIOUS],[])
AC_PROG_CC
m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
AC_SUBST(CFLAGS)
AC_PROG_LIBTOOL
# Find CPP now so that any conditional tests below won't do it and
# thereby make the resulting definitions conditional.
AC_PROG_CPP
if test -n "$with_cross_host"; then
# We are being configured with a cross compiler. AC_REPLACE_FUNCS
# may not work correctly, because the compiler may not be able to
# link executables.
# We assume newlib. This lets us hard-code the functions we know
# we'll have.
AC_DEFINE(HAVE_MEMCPY)
AC_DEFINE(HAVE_STRERROR)
# We ignore --with-system-zlib in this case.
target_all=libzgcj.la
else
AC_FUNC_MMAP
AC_CHECK_FUNCS(memcpy strerror)
if test "$with_system_zlib" = yes; then
AC_CHECK_LIB(z, deflate, target_all=, target_all=libzgcj.la)
else
target_all=libzgcj.la
fi
fi
AC_SUBST(target_all)
AC_CHECK_HEADERS(unistd.h)
if test -n "$with_cross_host" &&
test x"$with_cross_host" != x"no"; then
toolexecdir='$(exec_prefix)/$(target_alias)'
toolexeclibdir='$(toolexecdir)/lib'
else
toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
toolexeclibdir='$(libdir)'
fi
if test "$GCC" = yes && $CC -print-multi-os-directory > /dev/null 2>&1; then
multiosdir=/`$CC -print-multi-os-directory`
case $multiosdir in
/.) multiosdir= ;; # Avoid trailing /.
esac
else
multiosdir=
fi
toolexeclibdir=${toolexeclibdir}${multiosdir}
AC_SUBST(toolexecdir)
AC_SUBST(toolexeclibdir)
AM_CONDITIONAL(TARGET_LIBRARY, test -n "$with_target_subdir")
if test "${multilib}" = "yes"; then
multilib_arg="--enable-multilib"
else
multilib_arg=
fi
AC_ARG_ENABLE(host-shared,
[AS_HELP_STRING([--enable-host-shared],
[build host code as shared libraries])],
[PICFLAG=-fPIC], [PICFLAG=])
AC_SUBST(PICFLAG)
AC_CONFIG_FILES([Makefile])
AC_OUTPUT

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All files under this contrib directory are UNSUPPORTED. There were
provided by users of zlib and were not tested by the authors of zlib.
Use at your own risk. Please contact the authors of the contributions
for help about these, not the zlib authors. Thanks.
ada/ by Dmitriy Anisimkov <anisimkov@yahoo.com>
Support for Ada
See http://zlib-ada.sourceforge.net/
amd64/ by Mikhail Teterin <mi@ALDAN.algebra.com>
asm code for AMD64
See patch at http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/96393
asm686/ by Brian Raiter <breadbox@muppetlabs.com>
asm code for Pentium and PPro/PII, using the AT&T (GNU as) syntax
See http://www.muppetlabs.com/~breadbox/software/assembly.html
blast/ by Mark Adler <madler@alumni.caltech.edu>
Decompressor for output of PKWare Data Compression Library (DCL)
delphi/ by Cosmin Truta <cosmint@cs.ubbcluj.ro>
Support for Delphi and C++ Builder
dotzlib/ by Henrik Ravn <henrik@ravn.com>
Support for Microsoft .Net and Visual C++ .Net
gcc_gvmat64/by Gilles Vollant <info@winimage.com>
GCC Version of x86 64-bit (AMD64 and Intel EM64t) code for x64
assembler to replace longest_match() and inflate_fast()
infback9/ by Mark Adler <madler@alumni.caltech.edu>
Unsupported diffs to infback to decode the deflate64 format
inflate86/ by Chris Anderson <christop@charm.net>
Tuned x86 gcc asm code to replace inflate_fast()
iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
A C++ I/O streams interface to the zlib gz* functions
iostream2/ by Tyge Løvset <Tyge.Lovset@cmr.no>
Another C++ I/O streams interface
iostream3/ by Ludwig Schwardt <schwardt@sun.ac.za>
and Kevin Ruland <kevin@rodin.wustl.edu>
Yet another C++ I/O streams interface
masmx64/ by Gilles Vollant <info@winimage.com>
x86 64-bit (AMD64 and Intel EM64t) code for x64 assembler to
replace longest_match() and inflate_fast(), also masm x86
64-bits translation of Chris Anderson inflate_fast()
masmx86/ by Gilles Vollant <info@winimage.com>
x86 asm code to replace longest_match() and inflate_fast(),
for Visual C++ and MASM (32 bits).
Based on Brian Raiter (asm686) and Chris Anderson (inflate86)
minizip/ by Gilles Vollant <info@winimage.com>
Mini zip and unzip based on zlib
Includes Zip64 support by Mathias Svensson <mathias@result42.com>
See http://www.winimage.com/zLibDll/unzip.html
pascal/ by Bob Dellaca <bobdl@xtra.co.nz> et al.
Support for Pascal
puff/ by Mark Adler <madler@alumni.caltech.edu>
Small, low memory usage inflate. Also serves to provide an
unambiguous description of the deflate format.
testzlib/ by Gilles Vollant <info@winimage.com>
Example of the use of zlib
untgz/ by Pedro A. Aranda Gutierrez <paag@tid.es>
A very simple tar.gz file extractor using zlib
vstudio/ by Gilles Vollant <info@winimage.com>
Building a minizip-enhanced zlib with Microsoft Visual Studio

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2004 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
--
-- $Id: buffer_demo.adb,v 1.3 2004/09/06 06:55:35 vagul Exp $
-- This demo program provided by Dr Steve Sangwine <sjs@essex.ac.uk>
--
-- Demonstration of a problem with Zlib-Ada (already fixed) when a buffer
-- of exactly the correct size is used for decompressed data, and the last
-- few bytes passed in to Zlib are checksum bytes.
-- This program compresses a string of text, and then decompresses the
-- compressed text into a buffer of the same size as the original text.
with Ada.Streams; use Ada.Streams;
with Ada.Text_IO;
with ZLib; use ZLib;
procedure Buffer_Demo is
EOL : Character renames ASCII.LF;
Text : constant String
:= "Four score and seven years ago our fathers brought forth," & EOL &
"upon this continent, a new nation, conceived in liberty," & EOL &
"and dedicated to the proposition that `all men are created equal'.";
Source : Stream_Element_Array (1 .. Text'Length);
for Source'Address use Text'Address;
begin
Ada.Text_IO.Put (Text);
Ada.Text_IO.New_Line;
Ada.Text_IO.Put_Line
("Uncompressed size : " & Positive'Image (Text'Length) & " bytes");
declare
Compressed_Data : Stream_Element_Array (1 .. Text'Length);
L : Stream_Element_Offset;
begin
Compress : declare
Compressor : Filter_Type;
I : Stream_Element_Offset;
begin
Deflate_Init (Compressor);
-- Compress the whole of T at once.
Translate (Compressor, Source, I, Compressed_Data, L, Finish);
pragma Assert (I = Source'Last);
Close (Compressor);
Ada.Text_IO.Put_Line
("Compressed size : "
& Stream_Element_Offset'Image (L) & " bytes");
end Compress;
-- Now we decompress the data, passing short blocks of data to Zlib
-- (because this demonstrates the problem - the last block passed will
-- contain checksum information and there will be no output, only a
-- check inside Zlib that the checksum is correct).
Decompress : declare
Decompressor : Filter_Type;
Uncompressed_Data : Stream_Element_Array (1 .. Text'Length);
Block_Size : constant := 4;
-- This makes sure that the last block contains
-- only Adler checksum data.
P : Stream_Element_Offset := Compressed_Data'First - 1;
O : Stream_Element_Offset;
begin
Inflate_Init (Decompressor);
loop
Translate
(Decompressor,
Compressed_Data
(P + 1 .. Stream_Element_Offset'Min (P + Block_Size, L)),
P,
Uncompressed_Data
(Total_Out (Decompressor) + 1 .. Uncompressed_Data'Last),
O,
No_Flush);
Ada.Text_IO.Put_Line
("Total in : " & Count'Image (Total_In (Decompressor)) &
", out : " & Count'Image (Total_Out (Decompressor)));
exit when P = L;
end loop;
Ada.Text_IO.New_Line;
Ada.Text_IO.Put_Line
("Decompressed text matches original text : "
& Boolean'Image (Uncompressed_Data = Source));
end Decompress;
end;
end Buffer_Demo;

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2003 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
-- Continuous test for ZLib multithreading. If the test would fail
-- we should provide thread safe allocation routines for the Z_Stream.
--
-- $Id: mtest.adb,v 1.4 2004/07/23 07:49:54 vagul Exp $
with ZLib;
with Ada.Streams;
with Ada.Numerics.Discrete_Random;
with Ada.Text_IO;
with Ada.Exceptions;
with Ada.Task_Identification;
procedure MTest is
use Ada.Streams;
use ZLib;
Stop : Boolean := False;
pragma Atomic (Stop);
subtype Visible_Symbols is Stream_Element range 16#20# .. 16#7E#;
package Random_Elements is
new Ada.Numerics.Discrete_Random (Visible_Symbols);
task type Test_Task;
task body Test_Task is
Buffer : Stream_Element_Array (1 .. 100_000);
Gen : Random_Elements.Generator;
Buffer_First : Stream_Element_Offset;
Compare_First : Stream_Element_Offset;
Deflate : Filter_Type;
Inflate : Filter_Type;
procedure Further (Item : in Stream_Element_Array);
procedure Read_Buffer
(Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset);
-------------
-- Further --
-------------
procedure Further (Item : in Stream_Element_Array) is
procedure Compare (Item : in Stream_Element_Array);
-------------
-- Compare --
-------------
procedure Compare (Item : in Stream_Element_Array) is
Next_First : Stream_Element_Offset := Compare_First + Item'Length;
begin
if Buffer (Compare_First .. Next_First - 1) /= Item then
raise Program_Error;
end if;
Compare_First := Next_First;
end Compare;
procedure Compare_Write is new ZLib.Write (Write => Compare);
begin
Compare_Write (Inflate, Item, No_Flush);
end Further;
-----------------
-- Read_Buffer --
-----------------
procedure Read_Buffer
(Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset)
is
Buff_Diff : Stream_Element_Offset := Buffer'Last - Buffer_First;
Next_First : Stream_Element_Offset;
begin
if Item'Length <= Buff_Diff then
Last := Item'Last;
Next_First := Buffer_First + Item'Length;
Item := Buffer (Buffer_First .. Next_First - 1);
Buffer_First := Next_First;
else
Last := Item'First + Buff_Diff;
Item (Item'First .. Last) := Buffer (Buffer_First .. Buffer'Last);
Buffer_First := Buffer'Last + 1;
end if;
end Read_Buffer;
procedure Translate is new Generic_Translate
(Data_In => Read_Buffer,
Data_Out => Further);
begin
Random_Elements.Reset (Gen);
Buffer := (others => 20);
Main : loop
for J in Buffer'Range loop
Buffer (J) := Random_Elements.Random (Gen);
Deflate_Init (Deflate);
Inflate_Init (Inflate);
Buffer_First := Buffer'First;
Compare_First := Buffer'First;
Translate (Deflate);
if Compare_First /= Buffer'Last + 1 then
raise Program_Error;
end if;
Ada.Text_IO.Put_Line
(Ada.Task_Identification.Image
(Ada.Task_Identification.Current_Task)
& Stream_Element_Offset'Image (J)
& ZLib.Count'Image (Total_Out (Deflate)));
Close (Deflate);
Close (Inflate);
exit Main when Stop;
end loop;
end loop Main;
exception
when E : others =>
Ada.Text_IO.Put_Line (Ada.Exceptions.Exception_Information (E));
Stop := True;
end Test_Task;
Test : array (1 .. 4) of Test_Task;
pragma Unreferenced (Test);
Dummy : Character;
begin
Ada.Text_IO.Get_Immediate (Dummy);
Stop := True;
end MTest;

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2003 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
-- $Id: read.adb,v 1.8 2004/05/31 10:53:40 vagul Exp $
-- Test/demo program for the generic read interface.
with Ada.Numerics.Discrete_Random;
with Ada.Streams;
with Ada.Text_IO;
with ZLib;
procedure Read is
use Ada.Streams;
------------------------------------
-- Test configuration parameters --
------------------------------------
File_Size : Stream_Element_Offset := 100_000;
Continuous : constant Boolean := False;
-- If this constant is True, the test would be repeated again and again,
-- with increment File_Size for every iteration.
Header : constant ZLib.Header_Type := ZLib.Default;
-- Do not use Header other than Default in ZLib versions 1.1.4 and older.
Init_Random : constant := 8;
-- We are using the same random sequence, in case of we catch bug,
-- so we would be able to reproduce it.
-- End --
Pack_Size : Stream_Element_Offset;
Offset : Stream_Element_Offset;
Filter : ZLib.Filter_Type;
subtype Visible_Symbols
is Stream_Element range 16#20# .. 16#7E#;
package Random_Elements is new
Ada.Numerics.Discrete_Random (Visible_Symbols);
Gen : Random_Elements.Generator;
Period : constant Stream_Element_Offset := 200;
-- Period constant variable for random generator not to be very random.
-- Bigger period, harder random.
Read_Buffer : Stream_Element_Array (1 .. 2048);
Read_First : Stream_Element_Offset;
Read_Last : Stream_Element_Offset;
procedure Reset;
procedure Read
(Item : out Stream_Element_Array;
Last : out Stream_Element_Offset);
-- this procedure is for generic instantiation of
-- ZLib.Read
-- reading data from the File_In.
procedure Read is new ZLib.Read
(Read,
Read_Buffer,
Rest_First => Read_First,
Rest_Last => Read_Last);
----------
-- Read --
----------
procedure Read
(Item : out Stream_Element_Array;
Last : out Stream_Element_Offset) is
begin
Last := Stream_Element_Offset'Min
(Item'Last,
Item'First + File_Size - Offset);
for J in Item'First .. Last loop
if J < Item'First + Period then
Item (J) := Random_Elements.Random (Gen);
else
Item (J) := Item (J - Period);
end if;
Offset := Offset + 1;
end loop;
end Read;
-----------
-- Reset --
-----------
procedure Reset is
begin
Random_Elements.Reset (Gen, Init_Random);
Pack_Size := 0;
Offset := 1;
Read_First := Read_Buffer'Last + 1;
Read_Last := Read_Buffer'Last;
end Reset;
begin
Ada.Text_IO.Put_Line ("ZLib " & ZLib.Version);
loop
for Level in ZLib.Compression_Level'Range loop
Ada.Text_IO.Put ("Level ="
& ZLib.Compression_Level'Image (Level));
-- Deflate using generic instantiation.
ZLib.Deflate_Init
(Filter,
Level,
Header => Header);
Reset;
Ada.Text_IO.Put
(Stream_Element_Offset'Image (File_Size) & " ->");
loop
declare
Buffer : Stream_Element_Array (1 .. 1024);
Last : Stream_Element_Offset;
begin
Read (Filter, Buffer, Last);
Pack_Size := Pack_Size + Last - Buffer'First + 1;
exit when Last < Buffer'Last;
end;
end loop;
Ada.Text_IO.Put_Line (Stream_Element_Offset'Image (Pack_Size));
ZLib.Close (Filter);
end loop;
exit when not Continuous;
File_Size := File_Size + 1;
end loop;
end Read;

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ZLib for Ada thick binding (ZLib.Ada)
Release 1.3
ZLib.Ada is a thick binding interface to the popular ZLib data
compression library, available at http://www.gzip.org/zlib/.
It provides Ada-style access to the ZLib C library.
Here are the main changes since ZLib.Ada 1.2:
- Attension: ZLib.Read generic routine have a initialization requirement
for Read_Last parameter now. It is a bit incompartible with previous version,
but extends functionality, we could use new parameters Allow_Read_Some and
Flush now.
- Added Is_Open routines to ZLib and ZLib.Streams packages.
- Add pragma Assert to check Stream_Element is 8 bit.
- Fix extraction to buffer with exact known decompressed size. Error reported by
Steve Sangwine.
- Fix definition of ULong (changed to unsigned_long), fix regression on 64 bits
computers. Patch provided by Pascal Obry.
- Add Status_Error exception definition.
- Add pragma Assertion that Ada.Streams.Stream_Element size is 8 bit.
How to build ZLib.Ada under GNAT
You should have the ZLib library already build on your computer, before
building ZLib.Ada. Make the directory of ZLib.Ada sources current and
issue the command:
gnatmake test -largs -L<directory where libz.a is> -lz
Or use the GNAT project file build for GNAT 3.15 or later:
gnatmake -Pzlib.gpr -L<directory where libz.a is>
How to build ZLib.Ada under Aonix ObjectAda for Win32 7.2.2
1. Make a project with all *.ads and *.adb files from the distribution.
2. Build the libz.a library from the ZLib C sources.
3. Rename libz.a to z.lib.
4. Add the library z.lib to the project.
5. Add the libc.lib library from the ObjectAda distribution to the project.
6. Build the executable using test.adb as a main procedure.
How to use ZLib.Ada
The source files test.adb and read.adb are small demo programs that show
the main functionality of ZLib.Ada.
The routines from the package specifications are commented.
Homepage: http://zlib-ada.sourceforge.net/
Author: Dmitriy Anisimkov <anisimkov@yahoo.com>
Contributors: Pascal Obry <pascal@obry.org>, Steve Sangwine <sjs@essex.ac.uk>

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2003 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
-- $Id: test.adb,v 1.17 2003/08/12 12:13:30 vagul Exp $
-- The program has a few aims.
-- 1. Test ZLib.Ada95 thick binding functionality.
-- 2. Show the example of use main functionality of the ZLib.Ada95 binding.
-- 3. Build this program automatically compile all ZLib.Ada95 packages under
-- GNAT Ada95 compiler.
with ZLib.Streams;
with Ada.Streams.Stream_IO;
with Ada.Numerics.Discrete_Random;
with Ada.Text_IO;
with Ada.Calendar;
procedure Test is
use Ada.Streams;
use Stream_IO;
------------------------------------
-- Test configuration parameters --
------------------------------------
File_Size : Count := 100_000;
Continuous : constant Boolean := False;
Header : constant ZLib.Header_Type := ZLib.Default;
-- ZLib.None;
-- ZLib.Auto;
-- ZLib.GZip;
-- Do not use Header other then Default in ZLib versions 1.1.4
-- and older.
Strategy : constant ZLib.Strategy_Type := ZLib.Default_Strategy;
Init_Random : constant := 10;
-- End --
In_File_Name : constant String := "testzlib.in";
-- Name of the input file
Z_File_Name : constant String := "testzlib.zlb";
-- Name of the compressed file.
Out_File_Name : constant String := "testzlib.out";
-- Name of the decompressed file.
File_In : File_Type;
File_Out : File_Type;
File_Back : File_Type;
File_Z : ZLib.Streams.Stream_Type;
Filter : ZLib.Filter_Type;
Time_Stamp : Ada.Calendar.Time;
procedure Generate_File;
-- Generate file of spetsified size with some random data.
-- The random data is repeatable, for the good compression.
procedure Compare_Streams
(Left, Right : in out Root_Stream_Type'Class);
-- The procedure compearing data in 2 streams.
-- It is for compare data before and after compression/decompression.
procedure Compare_Files (Left, Right : String);
-- Compare files. Based on the Compare_Streams.
procedure Copy_Streams
(Source, Target : in out Root_Stream_Type'Class;
Buffer_Size : in Stream_Element_Offset := 1024);
-- Copying data from one stream to another. It is for test stream
-- interface of the library.
procedure Data_In
(Item : out Stream_Element_Array;
Last : out Stream_Element_Offset);
-- this procedure is for generic instantiation of
-- ZLib.Generic_Translate.
-- reading data from the File_In.
procedure Data_Out (Item : in Stream_Element_Array);
-- this procedure is for generic instantiation of
-- ZLib.Generic_Translate.
-- writing data to the File_Out.
procedure Stamp;
-- Store the timestamp to the local variable.
procedure Print_Statistic (Msg : String; Data_Size : ZLib.Count);
-- Print the time statistic with the message.
procedure Translate is new ZLib.Generic_Translate
(Data_In => Data_In,
Data_Out => Data_Out);
-- This procedure is moving data from File_In to File_Out
-- with compression or decompression, depend on initialization of
-- Filter parameter.
-------------------
-- Compare_Files --
-------------------
procedure Compare_Files (Left, Right : String) is
Left_File, Right_File : File_Type;
begin
Open (Left_File, In_File, Left);
Open (Right_File, In_File, Right);
Compare_Streams (Stream (Left_File).all, Stream (Right_File).all);
Close (Left_File);
Close (Right_File);
end Compare_Files;
---------------------
-- Compare_Streams --
---------------------
procedure Compare_Streams
(Left, Right : in out Ada.Streams.Root_Stream_Type'Class)
is
Left_Buffer, Right_Buffer : Stream_Element_Array (0 .. 16#FFF#);
Left_Last, Right_Last : Stream_Element_Offset;
begin
loop
Read (Left, Left_Buffer, Left_Last);
Read (Right, Right_Buffer, Right_Last);
if Left_Last /= Right_Last then
Ada.Text_IO.Put_Line ("Compare error :"
& Stream_Element_Offset'Image (Left_Last)
& " /= "
& Stream_Element_Offset'Image (Right_Last));
raise Constraint_Error;
elsif Left_Buffer (0 .. Left_Last)
/= Right_Buffer (0 .. Right_Last)
then
Ada.Text_IO.Put_Line ("ERROR: IN and OUT files is not equal.");
raise Constraint_Error;
end if;
exit when Left_Last < Left_Buffer'Last;
end loop;
end Compare_Streams;
------------------
-- Copy_Streams --
------------------
procedure Copy_Streams
(Source, Target : in out Ada.Streams.Root_Stream_Type'Class;
Buffer_Size : in Stream_Element_Offset := 1024)
is
Buffer : Stream_Element_Array (1 .. Buffer_Size);
Last : Stream_Element_Offset;
begin
loop
Read (Source, Buffer, Last);
Write (Target, Buffer (1 .. Last));
exit when Last < Buffer'Last;
end loop;
end Copy_Streams;
-------------
-- Data_In --
-------------
procedure Data_In
(Item : out Stream_Element_Array;
Last : out Stream_Element_Offset) is
begin
Read (File_In, Item, Last);
end Data_In;
--------------
-- Data_Out --
--------------
procedure Data_Out (Item : in Stream_Element_Array) is
begin
Write (File_Out, Item);
end Data_Out;
-------------------
-- Generate_File --
-------------------
procedure Generate_File is
subtype Visible_Symbols is Stream_Element range 16#20# .. 16#7E#;
package Random_Elements is
new Ada.Numerics.Discrete_Random (Visible_Symbols);
Gen : Random_Elements.Generator;
Buffer : Stream_Element_Array := (1 .. 77 => 16#20#) & 10;
Buffer_Count : constant Count := File_Size / Buffer'Length;
-- Number of same buffers in the packet.
Density : constant Count := 30; -- from 0 to Buffer'Length - 2;
procedure Fill_Buffer (J, D : in Count);
-- Change the part of the buffer.
-----------------
-- Fill_Buffer --
-----------------
procedure Fill_Buffer (J, D : in Count) is
begin
for K in 0 .. D loop
Buffer
(Stream_Element_Offset ((J + K) mod (Buffer'Length - 1) + 1))
:= Random_Elements.Random (Gen);
end loop;
end Fill_Buffer;
begin
Random_Elements.Reset (Gen, Init_Random);
Create (File_In, Out_File, In_File_Name);
Fill_Buffer (1, Buffer'Length - 2);
for J in 1 .. Buffer_Count loop
Write (File_In, Buffer);
Fill_Buffer (J, Density);
end loop;
-- fill remain size.
Write
(File_In,
Buffer
(1 .. Stream_Element_Offset
(File_Size - Buffer'Length * Buffer_Count)));
Flush (File_In);
Close (File_In);
end Generate_File;
---------------------
-- Print_Statistic --
---------------------
procedure Print_Statistic (Msg : String; Data_Size : ZLib.Count) is
use Ada.Calendar;
use Ada.Text_IO;
package Count_IO is new Integer_IO (ZLib.Count);
Curr_Dur : Duration := Clock - Time_Stamp;
begin
Put (Msg);
Set_Col (20);
Ada.Text_IO.Put ("size =");
Count_IO.Put
(Data_Size,
Width => Stream_IO.Count'Image (File_Size)'Length);
Put_Line (" duration =" & Duration'Image (Curr_Dur));
end Print_Statistic;
-----------
-- Stamp --
-----------
procedure Stamp is
begin
Time_Stamp := Ada.Calendar.Clock;
end Stamp;
begin
Ada.Text_IO.Put_Line ("ZLib " & ZLib.Version);
loop
Generate_File;
for Level in ZLib.Compression_Level'Range loop
Ada.Text_IO.Put_Line ("Level ="
& ZLib.Compression_Level'Image (Level));
-- Test generic interface.
Open (File_In, In_File, In_File_Name);
Create (File_Out, Out_File, Z_File_Name);
Stamp;
-- Deflate using generic instantiation.
ZLib.Deflate_Init
(Filter => Filter,
Level => Level,
Strategy => Strategy,
Header => Header);
Translate (Filter);
Print_Statistic ("Generic compress", ZLib.Total_Out (Filter));
ZLib.Close (Filter);
Close (File_In);
Close (File_Out);
Open (File_In, In_File, Z_File_Name);
Create (File_Out, Out_File, Out_File_Name);
Stamp;
-- Inflate using generic instantiation.
ZLib.Inflate_Init (Filter, Header => Header);
Translate (Filter);
Print_Statistic ("Generic decompress", ZLib.Total_Out (Filter));
ZLib.Close (Filter);
Close (File_In);
Close (File_Out);
Compare_Files (In_File_Name, Out_File_Name);
-- Test stream interface.
-- Compress to the back stream.
Open (File_In, In_File, In_File_Name);
Create (File_Back, Out_File, Z_File_Name);
Stamp;
ZLib.Streams.Create
(Stream => File_Z,
Mode => ZLib.Streams.Out_Stream,
Back => ZLib.Streams.Stream_Access
(Stream (File_Back)),
Back_Compressed => True,
Level => Level,
Strategy => Strategy,
Header => Header);
Copy_Streams
(Source => Stream (File_In).all,
Target => File_Z);
-- Flushing internal buffers to the back stream.
ZLib.Streams.Flush (File_Z, ZLib.Finish);
Print_Statistic ("Write compress",
ZLib.Streams.Write_Total_Out (File_Z));
ZLib.Streams.Close (File_Z);
Close (File_In);
Close (File_Back);
-- Compare reading from original file and from
-- decompression stream.
Open (File_In, In_File, In_File_Name);
Open (File_Back, In_File, Z_File_Name);
ZLib.Streams.Create
(Stream => File_Z,
Mode => ZLib.Streams.In_Stream,
Back => ZLib.Streams.Stream_Access
(Stream (File_Back)),
Back_Compressed => True,
Header => Header);
Stamp;
Compare_Streams (Stream (File_In).all, File_Z);
Print_Statistic ("Read decompress",
ZLib.Streams.Read_Total_Out (File_Z));
ZLib.Streams.Close (File_Z);
Close (File_In);
Close (File_Back);
-- Compress by reading from compression stream.
Open (File_Back, In_File, In_File_Name);
Create (File_Out, Out_File, Z_File_Name);
ZLib.Streams.Create
(Stream => File_Z,
Mode => ZLib.Streams.In_Stream,
Back => ZLib.Streams.Stream_Access
(Stream (File_Back)),
Back_Compressed => False,
Level => Level,
Strategy => Strategy,
Header => Header);
Stamp;
Copy_Streams
(Source => File_Z,
Target => Stream (File_Out).all);
Print_Statistic ("Read compress",
ZLib.Streams.Read_Total_Out (File_Z));
ZLib.Streams.Close (File_Z);
Close (File_Out);
Close (File_Back);
-- Decompress to decompression stream.
Open (File_In, In_File, Z_File_Name);
Create (File_Back, Out_File, Out_File_Name);
ZLib.Streams.Create
(Stream => File_Z,
Mode => ZLib.Streams.Out_Stream,
Back => ZLib.Streams.Stream_Access
(Stream (File_Back)),
Back_Compressed => False,
Header => Header);
Stamp;
Copy_Streams
(Source => Stream (File_In).all,
Target => File_Z);
Print_Statistic ("Write decompress",
ZLib.Streams.Write_Total_Out (File_Z));
ZLib.Streams.Close (File_Z);
Close (File_In);
Close (File_Back);
Compare_Files (In_File_Name, Out_File_Name);
end loop;
Ada.Text_IO.Put_Line (Count'Image (File_Size) & " Ok.");
exit when not Continuous;
File_Size := File_Size + 1;
end loop;
end Test;

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2003 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
-- $Id: zlib-streams.adb,v 1.10 2004/05/31 10:53:40 vagul Exp $
with Ada.Unchecked_Deallocation;
package body ZLib.Streams is
-----------
-- Close --
-----------
procedure Close (Stream : in out Stream_Type) is
procedure Free is new Ada.Unchecked_Deallocation
(Stream_Element_Array, Buffer_Access);
begin
if Stream.Mode = Out_Stream or Stream.Mode = Duplex then
-- We should flush the data written by the writer.
Flush (Stream, Finish);
Close (Stream.Writer);
end if;
if Stream.Mode = In_Stream or Stream.Mode = Duplex then
Close (Stream.Reader);
Free (Stream.Buffer);
end if;
end Close;
------------
-- Create --
------------
procedure Create
(Stream : out Stream_Type;
Mode : in Stream_Mode;
Back : in Stream_Access;
Back_Compressed : in Boolean;
Level : in Compression_Level := Default_Compression;
Strategy : in Strategy_Type := Default_Strategy;
Header : in Header_Type := Default;
Read_Buffer_Size : in Ada.Streams.Stream_Element_Offset
:= Default_Buffer_Size;
Write_Buffer_Size : in Ada.Streams.Stream_Element_Offset
:= Default_Buffer_Size)
is
subtype Buffer_Subtype is Stream_Element_Array (1 .. Read_Buffer_Size);
procedure Init_Filter
(Filter : in out Filter_Type;
Compress : in Boolean);
-----------------
-- Init_Filter --
-----------------
procedure Init_Filter
(Filter : in out Filter_Type;
Compress : in Boolean) is
begin
if Compress then
Deflate_Init
(Filter, Level, Strategy, Header => Header);
else
Inflate_Init (Filter, Header => Header);
end if;
end Init_Filter;
begin
Stream.Back := Back;
Stream.Mode := Mode;
if Mode = Out_Stream or Mode = Duplex then
Init_Filter (Stream.Writer, Back_Compressed);
Stream.Buffer_Size := Write_Buffer_Size;
else
Stream.Buffer_Size := 0;
end if;
if Mode = In_Stream or Mode = Duplex then
Init_Filter (Stream.Reader, not Back_Compressed);
Stream.Buffer := new Buffer_Subtype;
Stream.Rest_First := Stream.Buffer'Last + 1;
Stream.Rest_Last := Stream.Buffer'Last;
end if;
end Create;
-----------
-- Flush --
-----------
procedure Flush
(Stream : in out Stream_Type;
Mode : in Flush_Mode := Sync_Flush)
is
Buffer : Stream_Element_Array (1 .. Stream.Buffer_Size);
Last : Stream_Element_Offset;
begin
loop
Flush (Stream.Writer, Buffer, Last, Mode);
Ada.Streams.Write (Stream.Back.all, Buffer (1 .. Last));
exit when Last < Buffer'Last;
end loop;
end Flush;
-------------
-- Is_Open --
-------------
function Is_Open (Stream : Stream_Type) return Boolean is
begin
return Is_Open (Stream.Reader) or else Is_Open (Stream.Writer);
end Is_Open;
----------
-- Read --
----------
procedure Read
(Stream : in out Stream_Type;
Item : out Stream_Element_Array;
Last : out Stream_Element_Offset)
is
procedure Read
(Item : out Stream_Element_Array;
Last : out Stream_Element_Offset);
----------
-- Read --
----------
procedure Read
(Item : out Stream_Element_Array;
Last : out Stream_Element_Offset) is
begin
Ada.Streams.Read (Stream.Back.all, Item, Last);
end Read;
procedure Read is new ZLib.Read
(Read => Read,
Buffer => Stream.Buffer.all,
Rest_First => Stream.Rest_First,
Rest_Last => Stream.Rest_Last);
begin
Read (Stream.Reader, Item, Last);
end Read;
-------------------
-- Read_Total_In --
-------------------
function Read_Total_In (Stream : in Stream_Type) return Count is
begin
return Total_In (Stream.Reader);
end Read_Total_In;
--------------------
-- Read_Total_Out --
--------------------
function Read_Total_Out (Stream : in Stream_Type) return Count is
begin
return Total_Out (Stream.Reader);
end Read_Total_Out;
-----------
-- Write --
-----------
procedure Write
(Stream : in out Stream_Type;
Item : in Stream_Element_Array)
is
procedure Write (Item : in Stream_Element_Array);
-----------
-- Write --
-----------
procedure Write (Item : in Stream_Element_Array) is
begin
Ada.Streams.Write (Stream.Back.all, Item);
end Write;
procedure Write is new ZLib.Write
(Write => Write,
Buffer_Size => Stream.Buffer_Size);
begin
Write (Stream.Writer, Item, No_Flush);
end Write;
--------------------
-- Write_Total_In --
--------------------
function Write_Total_In (Stream : in Stream_Type) return Count is
begin
return Total_In (Stream.Writer);
end Write_Total_In;
---------------------
-- Write_Total_Out --
---------------------
function Write_Total_Out (Stream : in Stream_Type) return Count is
begin
return Total_Out (Stream.Writer);
end Write_Total_Out;
end ZLib.Streams;

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2003 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
-- $Id: zlib-streams.ads,v 1.12 2004/05/31 10:53:40 vagul Exp $
package ZLib.Streams is
type Stream_Mode is (In_Stream, Out_Stream, Duplex);
type Stream_Access is access all Ada.Streams.Root_Stream_Type'Class;
type Stream_Type is
new Ada.Streams.Root_Stream_Type with private;
procedure Read
(Stream : in out Stream_Type;
Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset);
procedure Write
(Stream : in out Stream_Type;
Item : in Ada.Streams.Stream_Element_Array);
procedure Flush
(Stream : in out Stream_Type;
Mode : in Flush_Mode := Sync_Flush);
-- Flush the written data to the back stream,
-- all data placed to the compressor is flushing to the Back stream.
-- Should not be used untill necessary, becouse it is decreasing
-- compression.
function Read_Total_In (Stream : in Stream_Type) return Count;
pragma Inline (Read_Total_In);
-- Return total number of bytes read from back stream so far.
function Read_Total_Out (Stream : in Stream_Type) return Count;
pragma Inline (Read_Total_Out);
-- Return total number of bytes read so far.
function Write_Total_In (Stream : in Stream_Type) return Count;
pragma Inline (Write_Total_In);
-- Return total number of bytes written so far.
function Write_Total_Out (Stream : in Stream_Type) return Count;
pragma Inline (Write_Total_Out);
-- Return total number of bytes written to the back stream.
procedure Create
(Stream : out Stream_Type;
Mode : in Stream_Mode;
Back : in Stream_Access;
Back_Compressed : in Boolean;
Level : in Compression_Level := Default_Compression;
Strategy : in Strategy_Type := Default_Strategy;
Header : in Header_Type := Default;
Read_Buffer_Size : in Ada.Streams.Stream_Element_Offset
:= Default_Buffer_Size;
Write_Buffer_Size : in Ada.Streams.Stream_Element_Offset
:= Default_Buffer_Size);
-- Create the Comression/Decompression stream.
-- If mode is In_Stream then Write operation is disabled.
-- If mode is Out_Stream then Read operation is disabled.
-- If Back_Compressed is true then
-- Data written to the Stream is compressing to the Back stream
-- and data read from the Stream is decompressed data from the Back stream.
-- If Back_Compressed is false then
-- Data written to the Stream is decompressing to the Back stream
-- and data read from the Stream is compressed data from the Back stream.
-- !!! When the Need_Header is False ZLib-Ada is using undocumented
-- ZLib 1.1.4 functionality to do not create/wait for ZLib headers.
function Is_Open (Stream : Stream_Type) return Boolean;
procedure Close (Stream : in out Stream_Type);
private
use Ada.Streams;
type Buffer_Access is access all Stream_Element_Array;
type Stream_Type
is new Root_Stream_Type with
record
Mode : Stream_Mode;
Buffer : Buffer_Access;
Rest_First : Stream_Element_Offset;
Rest_Last : Stream_Element_Offset;
-- Buffer for Read operation.
-- We need to have this buffer in the record
-- becouse not all read data from back stream
-- could be processed during the read operation.
Buffer_Size : Stream_Element_Offset;
-- Buffer size for write operation.
-- We do not need to have this buffer
-- in the record becouse all data could be
-- processed in the write operation.
Back : Stream_Access;
Reader : Filter_Type;
Writer : Filter_Type;
end record;
end ZLib.Streams;

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2003 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
-- $Id: zlib-thin.adb,v 1.8 2003/12/14 18:27:31 vagul Exp $
package body ZLib.Thin is
ZLIB_VERSION : constant Chars_Ptr := zlibVersion;
Z_Stream_Size : constant Int := Z_Stream'Size / System.Storage_Unit;
--------------
-- Avail_In --
--------------
function Avail_In (Strm : in Z_Stream) return UInt is
begin
return Strm.Avail_In;
end Avail_In;
---------------
-- Avail_Out --
---------------
function Avail_Out (Strm : in Z_Stream) return UInt is
begin
return Strm.Avail_Out;
end Avail_Out;
------------------
-- Deflate_Init --
------------------
function Deflate_Init
(strm : Z_Streamp;
level : Int;
method : Int;
windowBits : Int;
memLevel : Int;
strategy : Int)
return Int is
begin
return deflateInit2
(strm,
level,
method,
windowBits,
memLevel,
strategy,
ZLIB_VERSION,
Z_Stream_Size);
end Deflate_Init;
------------------
-- Inflate_Init --
------------------
function Inflate_Init (strm : Z_Streamp; windowBits : Int) return Int is
begin
return inflateInit2 (strm, windowBits, ZLIB_VERSION, Z_Stream_Size);
end Inflate_Init;
------------------------
-- Last_Error_Message --
------------------------
function Last_Error_Message (Strm : in Z_Stream) return String is
use Interfaces.C.Strings;
begin
if Strm.msg = Null_Ptr then
return "";
else
return Value (Strm.msg);
end if;
end Last_Error_Message;
------------
-- Set_In --
------------
procedure Set_In
(Strm : in out Z_Stream;
Buffer : in Voidp;
Size : in UInt) is
begin
Strm.Next_In := Buffer;
Strm.Avail_In := Size;
end Set_In;
------------------
-- Set_Mem_Func --
------------------
procedure Set_Mem_Func
(Strm : in out Z_Stream;
Opaque : in Voidp;
Alloc : in alloc_func;
Free : in free_func) is
begin
Strm.opaque := Opaque;
Strm.zalloc := Alloc;
Strm.zfree := Free;
end Set_Mem_Func;
-------------
-- Set_Out --
-------------
procedure Set_Out
(Strm : in out Z_Stream;
Buffer : in Voidp;
Size : in UInt) is
begin
Strm.Next_Out := Buffer;
Strm.Avail_Out := Size;
end Set_Out;
--------------
-- Total_In --
--------------
function Total_In (Strm : in Z_Stream) return ULong is
begin
return Strm.Total_In;
end Total_In;
---------------
-- Total_Out --
---------------
function Total_Out (Strm : in Z_Stream) return ULong is
begin
return Strm.Total_Out;
end Total_Out;
end ZLib.Thin;

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2003 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
-- $Id: zlib-thin.ads,v 1.11 2004/07/23 06:33:11 vagul Exp $
with Interfaces.C.Strings;
with System;
private package ZLib.Thin is
-- From zconf.h
MAX_MEM_LEVEL : constant := 9; -- zconf.h:105
-- zconf.h:105
MAX_WBITS : constant := 15; -- zconf.h:115
-- 32K LZ77 window
-- zconf.h:115
SEEK_SET : constant := 8#0000#; -- zconf.h:244
-- Seek from beginning of file.
-- zconf.h:244
SEEK_CUR : constant := 1; -- zconf.h:245
-- Seek from current position.
-- zconf.h:245
SEEK_END : constant := 2; -- zconf.h:246
-- Set file pointer to EOF plus "offset"
-- zconf.h:246
type Byte is new Interfaces.C.unsigned_char; -- 8 bits
-- zconf.h:214
type UInt is new Interfaces.C.unsigned; -- 16 bits or more
-- zconf.h:216
type Int is new Interfaces.C.int;
type ULong is new Interfaces.C.unsigned_long; -- 32 bits or more
-- zconf.h:217
subtype Chars_Ptr is Interfaces.C.Strings.chars_ptr;
type ULong_Access is access ULong;
type Int_Access is access Int;
subtype Voidp is System.Address; -- zconf.h:232
subtype Byte_Access is Voidp;
Nul : constant Voidp := System.Null_Address;
-- end from zconf
Z_NO_FLUSH : constant := 8#0000#; -- zlib.h:125
-- zlib.h:125
Z_PARTIAL_FLUSH : constant := 1; -- zlib.h:126
-- will be removed, use
-- Z_SYNC_FLUSH instead
-- zlib.h:126
Z_SYNC_FLUSH : constant := 2; -- zlib.h:127
-- zlib.h:127
Z_FULL_FLUSH : constant := 3; -- zlib.h:128
-- zlib.h:128
Z_FINISH : constant := 4; -- zlib.h:129
-- zlib.h:129
Z_OK : constant := 8#0000#; -- zlib.h:132
-- zlib.h:132
Z_STREAM_END : constant := 1; -- zlib.h:133
-- zlib.h:133
Z_NEED_DICT : constant := 2; -- zlib.h:134
-- zlib.h:134
Z_ERRNO : constant := -1; -- zlib.h:135
-- zlib.h:135
Z_STREAM_ERROR : constant := -2; -- zlib.h:136
-- zlib.h:136
Z_DATA_ERROR : constant := -3; -- zlib.h:137
-- zlib.h:137
Z_MEM_ERROR : constant := -4; -- zlib.h:138
-- zlib.h:138
Z_BUF_ERROR : constant := -5; -- zlib.h:139
-- zlib.h:139
Z_VERSION_ERROR : constant := -6; -- zlib.h:140
-- zlib.h:140
Z_NO_COMPRESSION : constant := 8#0000#; -- zlib.h:145
-- zlib.h:145
Z_BEST_SPEED : constant := 1; -- zlib.h:146
-- zlib.h:146
Z_BEST_COMPRESSION : constant := 9; -- zlib.h:147
-- zlib.h:147
Z_DEFAULT_COMPRESSION : constant := -1; -- zlib.h:148
-- zlib.h:148
Z_FILTERED : constant := 1; -- zlib.h:151
-- zlib.h:151
Z_HUFFMAN_ONLY : constant := 2; -- zlib.h:152
-- zlib.h:152
Z_DEFAULT_STRATEGY : constant := 8#0000#; -- zlib.h:153
-- zlib.h:153
Z_BINARY : constant := 8#0000#; -- zlib.h:156
-- zlib.h:156
Z_ASCII : constant := 1; -- zlib.h:157
-- zlib.h:157
Z_UNKNOWN : constant := 2; -- zlib.h:158
-- zlib.h:158
Z_DEFLATED : constant := 8; -- zlib.h:161
-- zlib.h:161
Z_NULL : constant := 8#0000#; -- zlib.h:164
-- for initializing zalloc, zfree, opaque
-- zlib.h:164
type gzFile is new Voidp; -- zlib.h:646
type Z_Stream is private;
type Z_Streamp is access all Z_Stream; -- zlib.h:89
type alloc_func is access function
(Opaque : Voidp;
Items : UInt;
Size : UInt)
return Voidp; -- zlib.h:63
type free_func is access procedure (opaque : Voidp; address : Voidp);
function zlibVersion return Chars_Ptr;
function Deflate (strm : Z_Streamp; flush : Int) return Int;
function DeflateEnd (strm : Z_Streamp) return Int;
function Inflate (strm : Z_Streamp; flush : Int) return Int;
function InflateEnd (strm : Z_Streamp) return Int;
function deflateSetDictionary
(strm : Z_Streamp;
dictionary : Byte_Access;
dictLength : UInt)
return Int;
function deflateCopy (dest : Z_Streamp; source : Z_Streamp) return Int;
-- zlib.h:478
function deflateReset (strm : Z_Streamp) return Int; -- zlib.h:495
function deflateParams
(strm : Z_Streamp;
level : Int;
strategy : Int)
return Int; -- zlib.h:506
function inflateSetDictionary
(strm : Z_Streamp;
dictionary : Byte_Access;
dictLength : UInt)
return Int; -- zlib.h:548
function inflateSync (strm : Z_Streamp) return Int; -- zlib.h:565
function inflateReset (strm : Z_Streamp) return Int; -- zlib.h:580
function compress
(dest : Byte_Access;
destLen : ULong_Access;
source : Byte_Access;
sourceLen : ULong)
return Int; -- zlib.h:601
function compress2
(dest : Byte_Access;
destLen : ULong_Access;
source : Byte_Access;
sourceLen : ULong;
level : Int)
return Int; -- zlib.h:615
function uncompress
(dest : Byte_Access;
destLen : ULong_Access;
source : Byte_Access;
sourceLen : ULong)
return Int;
function gzopen (path : Chars_Ptr; mode : Chars_Ptr) return gzFile;
function gzdopen (fd : Int; mode : Chars_Ptr) return gzFile;
function gzsetparams
(file : gzFile;
level : Int;
strategy : Int)
return Int;
function gzread
(file : gzFile;
buf : Voidp;
len : UInt)
return Int;
function gzwrite
(file : in gzFile;
buf : in Voidp;
len : in UInt)
return Int;
function gzprintf (file : in gzFile; format : in Chars_Ptr) return Int;
function gzputs (file : in gzFile; s : in Chars_Ptr) return Int;
function gzgets
(file : gzFile;
buf : Chars_Ptr;
len : Int)
return Chars_Ptr;
function gzputc (file : gzFile; char : Int) return Int;
function gzgetc (file : gzFile) return Int;
function gzflush (file : gzFile; flush : Int) return Int;
function gzseek
(file : gzFile;
offset : Int;
whence : Int)
return Int;
function gzrewind (file : gzFile) return Int;
function gztell (file : gzFile) return Int;
function gzeof (file : gzFile) return Int;
function gzclose (file : gzFile) return Int;
function gzerror (file : gzFile; errnum : Int_Access) return Chars_Ptr;
function adler32
(adler : ULong;
buf : Byte_Access;
len : UInt)
return ULong;
function crc32
(crc : ULong;
buf : Byte_Access;
len : UInt)
return ULong;
function deflateInit
(strm : Z_Streamp;
level : Int;
version : Chars_Ptr;
stream_size : Int)
return Int;
function deflateInit2
(strm : Z_Streamp;
level : Int;
method : Int;
windowBits : Int;
memLevel : Int;
strategy : Int;
version : Chars_Ptr;
stream_size : Int)
return Int;
function Deflate_Init
(strm : Z_Streamp;
level : Int;
method : Int;
windowBits : Int;
memLevel : Int;
strategy : Int)
return Int;
pragma Inline (Deflate_Init);
function inflateInit
(strm : Z_Streamp;
version : Chars_Ptr;
stream_size : Int)
return Int;
function inflateInit2
(strm : in Z_Streamp;
windowBits : in Int;
version : in Chars_Ptr;
stream_size : in Int)
return Int;
function inflateBackInit
(strm : in Z_Streamp;
windowBits : in Int;
window : in Byte_Access;
version : in Chars_Ptr;
stream_size : in Int)
return Int;
-- Size of window have to be 2**windowBits.
function Inflate_Init (strm : Z_Streamp; windowBits : Int) return Int;
pragma Inline (Inflate_Init);
function zError (err : Int) return Chars_Ptr;
function inflateSyncPoint (z : Z_Streamp) return Int;
function get_crc_table return ULong_Access;
-- Interface to the available fields of the z_stream structure.
-- The application must update next_in and avail_in when avail_in has
-- dropped to zero. It must update next_out and avail_out when avail_out
-- has dropped to zero. The application must initialize zalloc, zfree and
-- opaque before calling the init function.
procedure Set_In
(Strm : in out Z_Stream;
Buffer : in Voidp;
Size : in UInt);
pragma Inline (Set_In);
procedure Set_Out
(Strm : in out Z_Stream;
Buffer : in Voidp;
Size : in UInt);
pragma Inline (Set_Out);
procedure Set_Mem_Func
(Strm : in out Z_Stream;
Opaque : in Voidp;
Alloc : in alloc_func;
Free : in free_func);
pragma Inline (Set_Mem_Func);
function Last_Error_Message (Strm : in Z_Stream) return String;
pragma Inline (Last_Error_Message);
function Avail_Out (Strm : in Z_Stream) return UInt;
pragma Inline (Avail_Out);
function Avail_In (Strm : in Z_Stream) return UInt;
pragma Inline (Avail_In);
function Total_In (Strm : in Z_Stream) return ULong;
pragma Inline (Total_In);
function Total_Out (Strm : in Z_Stream) return ULong;
pragma Inline (Total_Out);
function inflateCopy
(dest : in Z_Streamp;
Source : in Z_Streamp)
return Int;
function compressBound (Source_Len : in ULong) return ULong;
function deflateBound
(Strm : in Z_Streamp;
Source_Len : in ULong)
return ULong;
function gzungetc (C : in Int; File : in gzFile) return Int;
function zlibCompileFlags return ULong;
private
type Z_Stream is record -- zlib.h:68
Next_In : Voidp := Nul; -- next input byte
Avail_In : UInt := 0; -- number of bytes available at next_in
Total_In : ULong := 0; -- total nb of input bytes read so far
Next_Out : Voidp := Nul; -- next output byte should be put there
Avail_Out : UInt := 0; -- remaining free space at next_out
Total_Out : ULong := 0; -- total nb of bytes output so far
msg : Chars_Ptr; -- last error message, NULL if no error
state : Voidp; -- not visible by applications
zalloc : alloc_func := null; -- used to allocate the internal state
zfree : free_func := null; -- used to free the internal state
opaque : Voidp; -- private data object passed to
-- zalloc and zfree
data_type : Int; -- best guess about the data type:
-- ascii or binary
adler : ULong; -- adler32 value of the uncompressed
-- data
reserved : ULong; -- reserved for future use
end record;
pragma Convention (C, Z_Stream);
pragma Import (C, zlibVersion, "zlibVersion");
pragma Import (C, Deflate, "deflate");
pragma Import (C, DeflateEnd, "deflateEnd");
pragma Import (C, Inflate, "inflate");
pragma Import (C, InflateEnd, "inflateEnd");
pragma Import (C, deflateSetDictionary, "deflateSetDictionary");
pragma Import (C, deflateCopy, "deflateCopy");
pragma Import (C, deflateReset, "deflateReset");
pragma Import (C, deflateParams, "deflateParams");
pragma Import (C, inflateSetDictionary, "inflateSetDictionary");
pragma Import (C, inflateSync, "inflateSync");
pragma Import (C, inflateReset, "inflateReset");
pragma Import (C, compress, "compress");
pragma Import (C, compress2, "compress2");
pragma Import (C, uncompress, "uncompress");
pragma Import (C, gzopen, "gzopen");
pragma Import (C, gzdopen, "gzdopen");
pragma Import (C, gzsetparams, "gzsetparams");
pragma Import (C, gzread, "gzread");
pragma Import (C, gzwrite, "gzwrite");
pragma Import (C, gzprintf, "gzprintf");
pragma Import (C, gzputs, "gzputs");
pragma Import (C, gzgets, "gzgets");
pragma Import (C, gzputc, "gzputc");
pragma Import (C, gzgetc, "gzgetc");
pragma Import (C, gzflush, "gzflush");
pragma Import (C, gzseek, "gzseek");
pragma Import (C, gzrewind, "gzrewind");
pragma Import (C, gztell, "gztell");
pragma Import (C, gzeof, "gzeof");
pragma Import (C, gzclose, "gzclose");
pragma Import (C, gzerror, "gzerror");
pragma Import (C, adler32, "adler32");
pragma Import (C, crc32, "crc32");
pragma Import (C, deflateInit, "deflateInit_");
pragma Import (C, inflateInit, "inflateInit_");
pragma Import (C, deflateInit2, "deflateInit2_");
pragma Import (C, inflateInit2, "inflateInit2_");
pragma Import (C, zError, "zError");
pragma Import (C, inflateSyncPoint, "inflateSyncPoint");
pragma Import (C, get_crc_table, "get_crc_table");
-- since zlib 1.2.0:
pragma Import (C, inflateCopy, "inflateCopy");
pragma Import (C, compressBound, "compressBound");
pragma Import (C, deflateBound, "deflateBound");
pragma Import (C, gzungetc, "gzungetc");
pragma Import (C, zlibCompileFlags, "zlibCompileFlags");
pragma Import (C, inflateBackInit, "inflateBackInit_");
-- I stopped binding the inflateBack routines, becouse realize that
-- it does not support zlib and gzip headers for now, and have no
-- symmetric deflateBack routines.
-- ZLib-Ada is symmetric regarding deflate/inflate data transformation
-- and has a similar generic callback interface for the
-- deflate/inflate transformation based on the regular Deflate/Inflate
-- routines.
-- pragma Import (C, inflateBack, "inflateBack");
-- pragma Import (C, inflateBackEnd, "inflateBackEnd");
end ZLib.Thin;

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----------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2004 Dmitriy Anisimkov --
-- --
-- Open source license information is in the zlib.ads file. --
----------------------------------------------------------------
-- $Id: zlib.adb,v 1.31 2004/09/06 06:53:19 vagul Exp $
with Ada.Exceptions;
with Ada.Unchecked_Conversion;
with Ada.Unchecked_Deallocation;
with Interfaces.C.Strings;
with ZLib.Thin;
package body ZLib is
use type Thin.Int;
type Z_Stream is new Thin.Z_Stream;
type Return_Code_Enum is
(OK,
STREAM_END,
NEED_DICT,
ERRNO,
STREAM_ERROR,
DATA_ERROR,
MEM_ERROR,
BUF_ERROR,
VERSION_ERROR);
type Flate_Step_Function is access
function (Strm : in Thin.Z_Streamp; Flush : in Thin.Int) return Thin.Int;
pragma Convention (C, Flate_Step_Function);
type Flate_End_Function is access
function (Ctrm : in Thin.Z_Streamp) return Thin.Int;
pragma Convention (C, Flate_End_Function);
type Flate_Type is record
Step : Flate_Step_Function;
Done : Flate_End_Function;
end record;
subtype Footer_Array is Stream_Element_Array (1 .. 8);
Simple_GZip_Header : constant Stream_Element_Array (1 .. 10)
:= (16#1f#, 16#8b#, -- Magic header
16#08#, -- Z_DEFLATED
16#00#, -- Flags
16#00#, 16#00#, 16#00#, 16#00#, -- Time
16#00#, -- XFlags
16#03# -- OS code
);
-- The simplest gzip header is not for informational, but just for
-- gzip format compatibility.
-- Note that some code below is using assumption
-- Simple_GZip_Header'Last > Footer_Array'Last, so do not make
-- Simple_GZip_Header'Last <= Footer_Array'Last.
Return_Code : constant array (Thin.Int range <>) of Return_Code_Enum
:= (0 => OK,
1 => STREAM_END,
2 => NEED_DICT,
-1 => ERRNO,
-2 => STREAM_ERROR,
-3 => DATA_ERROR,
-4 => MEM_ERROR,
-5 => BUF_ERROR,
-6 => VERSION_ERROR);
Flate : constant array (Boolean) of Flate_Type
:= (True => (Step => Thin.Deflate'Access,
Done => Thin.DeflateEnd'Access),
False => (Step => Thin.Inflate'Access,
Done => Thin.InflateEnd'Access));
Flush_Finish : constant array (Boolean) of Flush_Mode
:= (True => Finish, False => No_Flush);
procedure Raise_Error (Stream : in Z_Stream);
pragma Inline (Raise_Error);
procedure Raise_Error (Message : in String);
pragma Inline (Raise_Error);
procedure Check_Error (Stream : in Z_Stream; Code : in Thin.Int);
procedure Free is new Ada.Unchecked_Deallocation
(Z_Stream, Z_Stream_Access);
function To_Thin_Access is new Ada.Unchecked_Conversion
(Z_Stream_Access, Thin.Z_Streamp);
procedure Translate_GZip
(Filter : in out Filter_Type;
In_Data : in Ada.Streams.Stream_Element_Array;
In_Last : out Ada.Streams.Stream_Element_Offset;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode);
-- Separate translate routine for make gzip header.
procedure Translate_Auto
(Filter : in out Filter_Type;
In_Data : in Ada.Streams.Stream_Element_Array;
In_Last : out Ada.Streams.Stream_Element_Offset;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode);
-- translate routine without additional headers.
-----------------
-- Check_Error --
-----------------
procedure Check_Error (Stream : in Z_Stream; Code : in Thin.Int) is
use type Thin.Int;
begin
if Code /= Thin.Z_OK then
Raise_Error
(Return_Code_Enum'Image (Return_Code (Code))
& ": " & Last_Error_Message (Stream));
end if;
end Check_Error;
-----------
-- Close --
-----------
procedure Close
(Filter : in out Filter_Type;
Ignore_Error : in Boolean := False)
is
Code : Thin.Int;
begin
if not Ignore_Error and then not Is_Open (Filter) then
raise Status_Error;
end if;
Code := Flate (Filter.Compression).Done (To_Thin_Access (Filter.Strm));
if Ignore_Error or else Code = Thin.Z_OK then
Free (Filter.Strm);
else
declare
Error_Message : constant String
:= Last_Error_Message (Filter.Strm.all);
begin
Free (Filter.Strm);
Ada.Exceptions.Raise_Exception
(ZLib_Error'Identity,
Return_Code_Enum'Image (Return_Code (Code))
& ": " & Error_Message);
end;
end if;
end Close;
-----------
-- CRC32 --
-----------
function CRC32
(CRC : in Unsigned_32;
Data : in Ada.Streams.Stream_Element_Array)
return Unsigned_32
is
use Thin;
begin
return Unsigned_32 (crc32 (ULong (CRC),
Data'Address,
Data'Length));
end CRC32;
procedure CRC32
(CRC : in out Unsigned_32;
Data : in Ada.Streams.Stream_Element_Array) is
begin
CRC := CRC32 (CRC, Data);
end CRC32;
------------------
-- Deflate_Init --
------------------
procedure Deflate_Init
(Filter : in out Filter_Type;
Level : in Compression_Level := Default_Compression;
Strategy : in Strategy_Type := Default_Strategy;
Method : in Compression_Method := Deflated;
Window_Bits : in Window_Bits_Type := Default_Window_Bits;
Memory_Level : in Memory_Level_Type := Default_Memory_Level;
Header : in Header_Type := Default)
is
use type Thin.Int;
Win_Bits : Thin.Int := Thin.Int (Window_Bits);
begin
if Is_Open (Filter) then
raise Status_Error;
end if;
-- We allow ZLib to make header only in case of default header type.
-- Otherwise we would either do header by ourselfs, or do not do
-- header at all.
if Header = None or else Header = GZip then
Win_Bits := -Win_Bits;
end if;
-- For the GZip CRC calculation and make headers.
if Header = GZip then
Filter.CRC := 0;
Filter.Offset := Simple_GZip_Header'First;
else
Filter.Offset := Simple_GZip_Header'Last + 1;
end if;
Filter.Strm := new Z_Stream;
Filter.Compression := True;
Filter.Stream_End := False;
Filter.Header := Header;
if Thin.Deflate_Init
(To_Thin_Access (Filter.Strm),
Level => Thin.Int (Level),
method => Thin.Int (Method),
windowBits => Win_Bits,
memLevel => Thin.Int (Memory_Level),
strategy => Thin.Int (Strategy)) /= Thin.Z_OK
then
Raise_Error (Filter.Strm.all);
end if;
end Deflate_Init;
-----------
-- Flush --
-----------
procedure Flush
(Filter : in out Filter_Type;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode)
is
No_Data : Stream_Element_Array := (1 .. 0 => 0);
Last : Stream_Element_Offset;
begin
Translate (Filter, No_Data, Last, Out_Data, Out_Last, Flush);
end Flush;
-----------------------
-- Generic_Translate --
-----------------------
procedure Generic_Translate
(Filter : in out ZLib.Filter_Type;
In_Buffer_Size : in Integer := Default_Buffer_Size;
Out_Buffer_Size : in Integer := Default_Buffer_Size)
is
In_Buffer : Stream_Element_Array
(1 .. Stream_Element_Offset (In_Buffer_Size));
Out_Buffer : Stream_Element_Array
(1 .. Stream_Element_Offset (Out_Buffer_Size));
Last : Stream_Element_Offset;
In_Last : Stream_Element_Offset;
In_First : Stream_Element_Offset;
Out_Last : Stream_Element_Offset;
begin
Main : loop
Data_In (In_Buffer, Last);
In_First := In_Buffer'First;
loop
Translate
(Filter => Filter,
In_Data => In_Buffer (In_First .. Last),
In_Last => In_Last,
Out_Data => Out_Buffer,
Out_Last => Out_Last,
Flush => Flush_Finish (Last < In_Buffer'First));
if Out_Buffer'First <= Out_Last then
Data_Out (Out_Buffer (Out_Buffer'First .. Out_Last));
end if;
exit Main when Stream_End (Filter);
-- The end of in buffer.
exit when In_Last = Last;
In_First := In_Last + 1;
end loop;
end loop Main;
end Generic_Translate;
------------------
-- Inflate_Init --
------------------
procedure Inflate_Init
(Filter : in out Filter_Type;
Window_Bits : in Window_Bits_Type := Default_Window_Bits;
Header : in Header_Type := Default)
is
use type Thin.Int;
Win_Bits : Thin.Int := Thin.Int (Window_Bits);
procedure Check_Version;
-- Check the latest header types compatibility.
procedure Check_Version is
begin
if Version <= "1.1.4" then
Raise_Error
("Inflate header type " & Header_Type'Image (Header)
& " incompatible with ZLib version " & Version);
end if;
end Check_Version;
begin
if Is_Open (Filter) then
raise Status_Error;
end if;
case Header is
when None =>
Check_Version;
-- Inflate data without headers determined
-- by negative Win_Bits.
Win_Bits := -Win_Bits;
when GZip =>
Check_Version;
-- Inflate gzip data defined by flag 16.
Win_Bits := Win_Bits + 16;
when Auto =>
Check_Version;
-- Inflate with automatic detection
-- of gzip or native header defined by flag 32.
Win_Bits := Win_Bits + 32;
when Default => null;
end case;
Filter.Strm := new Z_Stream;
Filter.Compression := False;
Filter.Stream_End := False;
Filter.Header := Header;
if Thin.Inflate_Init
(To_Thin_Access (Filter.Strm), Win_Bits) /= Thin.Z_OK
then
Raise_Error (Filter.Strm.all);
end if;
end Inflate_Init;
-------------
-- Is_Open --
-------------
function Is_Open (Filter : in Filter_Type) return Boolean is
begin
return Filter.Strm /= null;
end Is_Open;
-----------------
-- Raise_Error --
-----------------
procedure Raise_Error (Message : in String) is
begin
Ada.Exceptions.Raise_Exception (ZLib_Error'Identity, Message);
end Raise_Error;
procedure Raise_Error (Stream : in Z_Stream) is
begin
Raise_Error (Last_Error_Message (Stream));
end Raise_Error;
----------
-- Read --
----------
procedure Read
(Filter : in out Filter_Type;
Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode := No_Flush)
is
In_Last : Stream_Element_Offset;
Item_First : Ada.Streams.Stream_Element_Offset := Item'First;
V_Flush : Flush_Mode := Flush;
begin
pragma Assert (Rest_First in Buffer'First .. Buffer'Last + 1);
pragma Assert (Rest_Last in Buffer'First - 1 .. Buffer'Last);
loop
if Rest_Last = Buffer'First - 1 then
V_Flush := Finish;
elsif Rest_First > Rest_Last then
Read (Buffer, Rest_Last);
Rest_First := Buffer'First;
if Rest_Last < Buffer'First then
V_Flush := Finish;
end if;
end if;
Translate
(Filter => Filter,
In_Data => Buffer (Rest_First .. Rest_Last),
In_Last => In_Last,
Out_Data => Item (Item_First .. Item'Last),
Out_Last => Last,
Flush => V_Flush);
Rest_First := In_Last + 1;
exit when Stream_End (Filter)
or else Last = Item'Last
or else (Last >= Item'First and then Allow_Read_Some);
Item_First := Last + 1;
end loop;
end Read;
----------------
-- Stream_End --
----------------
function Stream_End (Filter : in Filter_Type) return Boolean is
begin
if Filter.Header = GZip and Filter.Compression then
return Filter.Stream_End
and then Filter.Offset = Footer_Array'Last + 1;
else
return Filter.Stream_End;
end if;
end Stream_End;
--------------
-- Total_In --
--------------
function Total_In (Filter : in Filter_Type) return Count is
begin
return Count (Thin.Total_In (To_Thin_Access (Filter.Strm).all));
end Total_In;
---------------
-- Total_Out --
---------------
function Total_Out (Filter : in Filter_Type) return Count is
begin
return Count (Thin.Total_Out (To_Thin_Access (Filter.Strm).all));
end Total_Out;
---------------
-- Translate --
---------------
procedure Translate
(Filter : in out Filter_Type;
In_Data : in Ada.Streams.Stream_Element_Array;
In_Last : out Ada.Streams.Stream_Element_Offset;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode) is
begin
if Filter.Header = GZip and then Filter.Compression then
Translate_GZip
(Filter => Filter,
In_Data => In_Data,
In_Last => In_Last,
Out_Data => Out_Data,
Out_Last => Out_Last,
Flush => Flush);
else
Translate_Auto
(Filter => Filter,
In_Data => In_Data,
In_Last => In_Last,
Out_Data => Out_Data,
Out_Last => Out_Last,
Flush => Flush);
end if;
end Translate;
--------------------
-- Translate_Auto --
--------------------
procedure Translate_Auto
(Filter : in out Filter_Type;
In_Data : in Ada.Streams.Stream_Element_Array;
In_Last : out Ada.Streams.Stream_Element_Offset;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode)
is
use type Thin.Int;
Code : Thin.Int;
begin
if not Is_Open (Filter) then
raise Status_Error;
end if;
if Out_Data'Length = 0 and then In_Data'Length = 0 then
raise Constraint_Error;
end if;
Set_Out (Filter.Strm.all, Out_Data'Address, Out_Data'Length);
Set_In (Filter.Strm.all, In_Data'Address, In_Data'Length);
Code := Flate (Filter.Compression).Step
(To_Thin_Access (Filter.Strm),
Thin.Int (Flush));
if Code = Thin.Z_STREAM_END then
Filter.Stream_End := True;
else
Check_Error (Filter.Strm.all, Code);
end if;
In_Last := In_Data'Last
- Stream_Element_Offset (Avail_In (Filter.Strm.all));
Out_Last := Out_Data'Last
- Stream_Element_Offset (Avail_Out (Filter.Strm.all));
end Translate_Auto;
--------------------
-- Translate_GZip --
--------------------
procedure Translate_GZip
(Filter : in out Filter_Type;
In_Data : in Ada.Streams.Stream_Element_Array;
In_Last : out Ada.Streams.Stream_Element_Offset;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode)
is
Out_First : Stream_Element_Offset;
procedure Add_Data (Data : in Stream_Element_Array);
-- Add data to stream from the Filter.Offset till necessary,
-- used for add gzip headr/footer.
procedure Put_32
(Item : in out Stream_Element_Array;
Data : in Unsigned_32);
pragma Inline (Put_32);
--------------
-- Add_Data --
--------------
procedure Add_Data (Data : in Stream_Element_Array) is
Data_First : Stream_Element_Offset renames Filter.Offset;
Data_Last : Stream_Element_Offset;
Data_Len : Stream_Element_Offset; -- -1
Out_Len : Stream_Element_Offset; -- -1
begin
Out_First := Out_Last + 1;
if Data_First > Data'Last then
return;
end if;
Data_Len := Data'Last - Data_First;
Out_Len := Out_Data'Last - Out_First;
if Data_Len <= Out_Len then
Out_Last := Out_First + Data_Len;
Data_Last := Data'Last;
else
Out_Last := Out_Data'Last;
Data_Last := Data_First + Out_Len;
end if;
Out_Data (Out_First .. Out_Last) := Data (Data_First .. Data_Last);
Data_First := Data_Last + 1;
Out_First := Out_Last + 1;
end Add_Data;
------------
-- Put_32 --
------------
procedure Put_32
(Item : in out Stream_Element_Array;
Data : in Unsigned_32)
is
D : Unsigned_32 := Data;
begin
for J in Item'First .. Item'First + 3 loop
Item (J) := Stream_Element (D and 16#FF#);
D := Shift_Right (D, 8);
end loop;
end Put_32;
begin
Out_Last := Out_Data'First - 1;
if not Filter.Stream_End then
Add_Data (Simple_GZip_Header);
Translate_Auto
(Filter => Filter,
In_Data => In_Data,
In_Last => In_Last,
Out_Data => Out_Data (Out_First .. Out_Data'Last),
Out_Last => Out_Last,
Flush => Flush);
CRC32 (Filter.CRC, In_Data (In_Data'First .. In_Last));
end if;
if Filter.Stream_End and then Out_Last <= Out_Data'Last then
-- This detection method would work only when
-- Simple_GZip_Header'Last > Footer_Array'Last
if Filter.Offset = Simple_GZip_Header'Last + 1 then
Filter.Offset := Footer_Array'First;
end if;
declare
Footer : Footer_Array;
begin
Put_32 (Footer, Filter.CRC);
Put_32 (Footer (Footer'First + 4 .. Footer'Last),
Unsigned_32 (Total_In (Filter)));
Add_Data (Footer);
end;
end if;
end Translate_GZip;
-------------
-- Version --
-------------
function Version return String is
begin
return Interfaces.C.Strings.Value (Thin.zlibVersion);
end Version;
-----------
-- Write --
-----------
procedure Write
(Filter : in out Filter_Type;
Item : in Ada.Streams.Stream_Element_Array;
Flush : in Flush_Mode := No_Flush)
is
Buffer : Stream_Element_Array (1 .. Buffer_Size);
In_Last : Stream_Element_Offset;
Out_Last : Stream_Element_Offset;
In_First : Stream_Element_Offset := Item'First;
begin
if Item'Length = 0 and Flush = No_Flush then
return;
end if;
loop
Translate
(Filter => Filter,
In_Data => Item (In_First .. Item'Last),
In_Last => In_Last,
Out_Data => Buffer,
Out_Last => Out_Last,
Flush => Flush);
if Out_Last >= Buffer'First then
Write (Buffer (1 .. Out_Last));
end if;
exit when In_Last = Item'Last or Stream_End (Filter);
In_First := In_Last + 1;
end loop;
end Write;
end ZLib;

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@ -0,0 +1,328 @@
------------------------------------------------------------------------------
-- ZLib for Ada thick binding. --
-- --
-- Copyright (C) 2002-2004 Dmitriy Anisimkov --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under the terms of the GNU General Public License as published by --
-- the Free Software Foundation; either version 2 of the License, or (at --
-- your option) any later version. --
-- --
-- This library is distributed in the hope that it will be useful, but --
-- WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public License --
-- along with this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
------------------------------------------------------------------------------
-- $Id: zlib.ads,v 1.26 2004/09/06 06:53:19 vagul Exp $
with Ada.Streams;
with Interfaces;
package ZLib is
ZLib_Error : exception;
Status_Error : exception;
type Compression_Level is new Integer range -1 .. 9;
type Flush_Mode is private;
type Compression_Method is private;
type Window_Bits_Type is new Integer range 8 .. 15;
type Memory_Level_Type is new Integer range 1 .. 9;
type Unsigned_32 is new Interfaces.Unsigned_32;
type Strategy_Type is private;
type Header_Type is (None, Auto, Default, GZip);
-- Header type usage have a some limitation for inflate.
-- See comment for Inflate_Init.
subtype Count is Ada.Streams.Stream_Element_Count;
Default_Memory_Level : constant Memory_Level_Type := 8;
Default_Window_Bits : constant Window_Bits_Type := 15;
----------------------------------
-- Compression method constants --
----------------------------------
Deflated : constant Compression_Method;
-- Only one method allowed in this ZLib version
---------------------------------
-- Compression level constants --
---------------------------------
No_Compression : constant Compression_Level := 0;
Best_Speed : constant Compression_Level := 1;
Best_Compression : constant Compression_Level := 9;
Default_Compression : constant Compression_Level := -1;
--------------------------
-- Flush mode constants --
--------------------------
No_Flush : constant Flush_Mode;
-- Regular way for compression, no flush
Partial_Flush : constant Flush_Mode;
-- Will be removed, use Z_SYNC_FLUSH instead
Sync_Flush : constant Flush_Mode;
-- All pending output is flushed to the output buffer and the output
-- is aligned on a byte boundary, so that the decompressor can get all
-- input data available so far. (In particular avail_in is zero after the
-- call if enough output space has been provided before the call.)
-- Flushing may degrade compression for some compression algorithms and so
-- it should be used only when necessary.
Block_Flush : constant Flush_Mode;
-- Z_BLOCK requests that inflate() stop
-- if and when it get to the next deflate block boundary. When decoding the
-- zlib or gzip format, this will cause inflate() to return immediately
-- after the header and before the first block. When doing a raw inflate,
-- inflate() will go ahead and process the first block, and will return
-- when it gets to the end of that block, or when it runs out of data.
Full_Flush : constant Flush_Mode;
-- All output is flushed as with SYNC_FLUSH, and the compression state
-- is reset so that decompression can restart from this point if previous
-- compressed data has been damaged or if random access is desired. Using
-- Full_Flush too often can seriously degrade the compression.
Finish : constant Flush_Mode;
-- Just for tell the compressor that input data is complete.
------------------------------------
-- Compression strategy constants --
------------------------------------
-- RLE stategy could be used only in version 1.2.0 and later.
Filtered : constant Strategy_Type;
Huffman_Only : constant Strategy_Type;
RLE : constant Strategy_Type;
Default_Strategy : constant Strategy_Type;
Default_Buffer_Size : constant := 4096;
type Filter_Type is tagged limited private;
-- The filter is for compression and for decompression.
-- The usage of the type is depend of its initialization.
function Version return String;
pragma Inline (Version);
-- Return string representation of the ZLib version.
procedure Deflate_Init
(Filter : in out Filter_Type;
Level : in Compression_Level := Default_Compression;
Strategy : in Strategy_Type := Default_Strategy;
Method : in Compression_Method := Deflated;
Window_Bits : in Window_Bits_Type := Default_Window_Bits;
Memory_Level : in Memory_Level_Type := Default_Memory_Level;
Header : in Header_Type := Default);
-- Compressor initialization.
-- When Header parameter is Auto or Default, then default zlib header
-- would be provided for compressed data.
-- When Header is GZip, then gzip header would be set instead of
-- default header.
-- When Header is None, no header would be set for compressed data.
procedure Inflate_Init
(Filter : in out Filter_Type;
Window_Bits : in Window_Bits_Type := Default_Window_Bits;
Header : in Header_Type := Default);
-- Decompressor initialization.
-- Default header type mean that ZLib default header is expecting in the
-- input compressed stream.
-- Header type None mean that no header is expecting in the input stream.
-- GZip header type mean that GZip header is expecting in the
-- input compressed stream.
-- Auto header type mean that header type (GZip or Native) would be
-- detected automatically in the input stream.
-- Note that header types parameter values None, GZip and Auto are
-- supported for inflate routine only in ZLib versions 1.2.0.2 and later.
-- Deflate_Init is supporting all header types.
function Is_Open (Filter : in Filter_Type) return Boolean;
pragma Inline (Is_Open);
-- Is the filter opened for compression or decompression.
procedure Close
(Filter : in out Filter_Type;
Ignore_Error : in Boolean := False);
-- Closing the compression or decompressor.
-- If stream is closing before the complete and Ignore_Error is False,
-- The exception would be raised.
generic
with procedure Data_In
(Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset);
with procedure Data_Out
(Item : in Ada.Streams.Stream_Element_Array);
procedure Generic_Translate
(Filter : in out Filter_Type;
In_Buffer_Size : in Integer := Default_Buffer_Size;
Out_Buffer_Size : in Integer := Default_Buffer_Size);
-- Compress/decompress data fetch from Data_In routine and pass the result
-- to the Data_Out routine. User should provide Data_In and Data_Out
-- for compression/decompression data flow.
-- Compression or decompression depend on Filter initialization.
function Total_In (Filter : in Filter_Type) return Count;
pragma Inline (Total_In);
-- Returns total number of input bytes read so far
function Total_Out (Filter : in Filter_Type) return Count;
pragma Inline (Total_Out);
-- Returns total number of bytes output so far
function CRC32
(CRC : in Unsigned_32;
Data : in Ada.Streams.Stream_Element_Array)
return Unsigned_32;
pragma Inline (CRC32);
-- Compute CRC32, it could be necessary for make gzip format
procedure CRC32
(CRC : in out Unsigned_32;
Data : in Ada.Streams.Stream_Element_Array);
pragma Inline (CRC32);
-- Compute CRC32, it could be necessary for make gzip format
-------------------------------------------------
-- Below is more complex low level routines. --
-------------------------------------------------
procedure Translate
(Filter : in out Filter_Type;
In_Data : in Ada.Streams.Stream_Element_Array;
In_Last : out Ada.Streams.Stream_Element_Offset;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode);
-- Compress/decompress the In_Data buffer and place the result into
-- Out_Data. In_Last is the index of last element from In_Data accepted by
-- the Filter. Out_Last is the last element of the received data from
-- Filter. To tell the filter that incoming data are complete put the
-- Flush parameter to Finish.
function Stream_End (Filter : in Filter_Type) return Boolean;
pragma Inline (Stream_End);
-- Return the true when the stream is complete.
procedure Flush
(Filter : in out Filter_Type;
Out_Data : out Ada.Streams.Stream_Element_Array;
Out_Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode);
pragma Inline (Flush);
-- Flushing the data from the compressor.
generic
with procedure Write
(Item : in Ada.Streams.Stream_Element_Array);
-- User should provide this routine for accept
-- compressed/decompressed data.
Buffer_Size : in Ada.Streams.Stream_Element_Offset
:= Default_Buffer_Size;
-- Buffer size for Write user routine.
procedure Write
(Filter : in out Filter_Type;
Item : in Ada.Streams.Stream_Element_Array;
Flush : in Flush_Mode := No_Flush);
-- Compress/Decompress data from Item to the generic parameter procedure
-- Write. Output buffer size could be set in Buffer_Size generic parameter.
generic
with procedure Read
(Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset);
-- User should provide data for compression/decompression
-- thru this routine.
Buffer : in out Ada.Streams.Stream_Element_Array;
-- Buffer for keep remaining data from the previous
-- back read.
Rest_First, Rest_Last : in out Ada.Streams.Stream_Element_Offset;
-- Rest_First have to be initialized to Buffer'Last + 1
-- Rest_Last have to be initialized to Buffer'Last
-- before usage.
Allow_Read_Some : in Boolean := False;
-- Is it allowed to return Last < Item'Last before end of data.
procedure Read
(Filter : in out Filter_Type;
Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset;
Flush : in Flush_Mode := No_Flush);
-- Compress/Decompress data from generic parameter procedure Read to the
-- Item. User should provide Buffer and initialized Rest_First, Rest_Last
-- indicators. If Allow_Read_Some is True, Read routines could return
-- Last < Item'Last only at end of stream.
private
use Ada.Streams;
pragma Assert (Ada.Streams.Stream_Element'Size = 8);
pragma Assert (Ada.Streams.Stream_Element'Modulus = 2**8);
type Flush_Mode is new Integer range 0 .. 5;
type Compression_Method is new Integer range 8 .. 8;
type Strategy_Type is new Integer range 0 .. 3;
No_Flush : constant Flush_Mode := 0;
Partial_Flush : constant Flush_Mode := 1;
Sync_Flush : constant Flush_Mode := 2;
Full_Flush : constant Flush_Mode := 3;
Finish : constant Flush_Mode := 4;
Block_Flush : constant Flush_Mode := 5;
Filtered : constant Strategy_Type := 1;
Huffman_Only : constant Strategy_Type := 2;
RLE : constant Strategy_Type := 3;
Default_Strategy : constant Strategy_Type := 0;
Deflated : constant Compression_Method := 8;
type Z_Stream;
type Z_Stream_Access is access all Z_Stream;
type Filter_Type is tagged limited record
Strm : Z_Stream_Access;
Compression : Boolean;
Stream_End : Boolean;
Header : Header_Type;
CRC : Unsigned_32;
Offset : Stream_Element_Offset;
-- Offset for gzip header/footer output.
end record;
end ZLib;

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zlib/contrib/ada/zlib.gpr Normal file
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@ -0,0 +1,20 @@
project Zlib is
for Languages use ("Ada");
for Source_Dirs use (".");
for Object_Dir use ".";
for Main use ("test.adb", "mtest.adb", "read.adb", "buffer_demo");
package Compiler is
for Default_Switches ("ada") use ("-gnatwcfilopru", "-gnatVcdfimorst", "-gnatyabcefhiklmnoprst");
end Compiler;
package Linker is
for Default_Switches ("ada") use ("-lz");
end Linker;
package Builder is
for Default_Switches ("ada") use ("-s", "-gnatQ");
end Builder;
end Zlib;

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zlib/contrib/amd64/amd64-match.S Normal file
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/*
* match.S -- optimized version of longest_match()
* based on the similar work by Gilles Vollant, and Brian Raiter, written 1998
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the BSD License. Use by owners of Che Guevarra
* parafernalia is prohibited, where possible, and highly discouraged
* elsewhere.
*/
#ifndef NO_UNDERLINE
# define match_init _match_init
# define longest_match _longest_match
#endif
#define scanend ebx
#define scanendw bx
#define chainlenwmask edx /* high word: current chain len low word: s->wmask */
#define curmatch rsi
#define curmatchd esi
#define windowbestlen r8
#define scanalign r9
#define scanalignd r9d
#define window r10
#define bestlen r11
#define bestlend r11d
#define scanstart r12d
#define scanstartw r12w
#define scan r13
#define nicematch r14d
#define limit r15
#define limitd r15d
#define prev rcx
/*
* The 258 is a "magic number, not a parameter -- changing it
* breaks the hell loose
*/
#define MAX_MATCH (258)
#define MIN_MATCH (3)
#define MIN_LOOKAHEAD (MAX_MATCH + MIN_MATCH + 1)
#define MAX_MATCH_8 ((MAX_MATCH + 7) & ~7)
/* stack frame offsets */
#define LocalVarsSize (112)
#define _chainlenwmask ( 8-LocalVarsSize)(%rsp)
#define _windowbestlen (16-LocalVarsSize)(%rsp)
#define save_r14 (24-LocalVarsSize)(%rsp)
#define save_rsi (32-LocalVarsSize)(%rsp)
#define save_rbx (40-LocalVarsSize)(%rsp)
#define save_r12 (56-LocalVarsSize)(%rsp)
#define save_r13 (64-LocalVarsSize)(%rsp)
#define save_r15 (80-LocalVarsSize)(%rsp)
.globl match_init, longest_match
/*
* On AMD64 the first argument of a function (in our case -- the pointer to
* deflate_state structure) is passed in %rdi, hence our offsets below are
* all off of that.
*/
/* you can check the structure offset by running
#include <stdlib.h>
#include <stdio.h>
#include "deflate.h"
void print_depl()
{
deflate_state ds;
deflate_state *s=&ds;
printf("size pointer=%u\n",(int)sizeof(void*));
printf("#define dsWSize (%3u)(%%rdi)\n",(int)(((char*)&(s->w_size))-((char*)s)));
printf("#define dsWMask (%3u)(%%rdi)\n",(int)(((char*)&(s->w_mask))-((char*)s)));
printf("#define dsWindow (%3u)(%%rdi)\n",(int)(((char*)&(s->window))-((char*)s)));
printf("#define dsPrev (%3u)(%%rdi)\n",(int)(((char*)&(s->prev))-((char*)s)));
printf("#define dsMatchLen (%3u)(%%rdi)\n",(int)(((char*)&(s->match_length))-((char*)s)));
printf("#define dsPrevMatch (%3u)(%%rdi)\n",(int)(((char*)&(s->prev_match))-((char*)s)));
printf("#define dsStrStart (%3u)(%%rdi)\n",(int)(((char*)&(s->strstart))-((char*)s)));
printf("#define dsMatchStart (%3u)(%%rdi)\n",(int)(((char*)&(s->match_start))-((char*)s)));
printf("#define dsLookahead (%3u)(%%rdi)\n",(int)(((char*)&(s->lookahead))-((char*)s)));
printf("#define dsPrevLen (%3u)(%%rdi)\n",(int)(((char*)&(s->prev_length))-((char*)s)));
printf("#define dsMaxChainLen (%3u)(%%rdi)\n",(int)(((char*)&(s->max_chain_length))-((char*)s)));
printf("#define dsGoodMatch (%3u)(%%rdi)\n",(int)(((char*)&(s->good_match))-((char*)s)));
printf("#define dsNiceMatch (%3u)(%%rdi)\n",(int)(((char*)&(s->nice_match))-((char*)s)));
}
*/
/*
to compile for XCode 3.2 on MacOSX x86_64
- run "gcc -g -c -DXCODE_MAC_X64_STRUCTURE amd64-match.S"
*/
#ifndef CURRENT_LINX_XCODE_MAC_X64_STRUCTURE
#define dsWSize ( 68)(%rdi)
#define dsWMask ( 76)(%rdi)
#define dsWindow ( 80)(%rdi)
#define dsPrev ( 96)(%rdi)
#define dsMatchLen (144)(%rdi)
#define dsPrevMatch (148)(%rdi)
#define dsStrStart (156)(%rdi)
#define dsMatchStart (160)(%rdi)
#define dsLookahead (164)(%rdi)
#define dsPrevLen (168)(%rdi)
#define dsMaxChainLen (172)(%rdi)
#define dsGoodMatch (188)(%rdi)
#define dsNiceMatch (192)(%rdi)
#else
#ifndef STRUCT_OFFSET
# define STRUCT_OFFSET (0)
#endif
#define dsWSize ( 56 + STRUCT_OFFSET)(%rdi)
#define dsWMask ( 64 + STRUCT_OFFSET)(%rdi)
#define dsWindow ( 72 + STRUCT_OFFSET)(%rdi)
#define dsPrev ( 88 + STRUCT_OFFSET)(%rdi)
#define dsMatchLen (136 + STRUCT_OFFSET)(%rdi)
#define dsPrevMatch (140 + STRUCT_OFFSET)(%rdi)
#define dsStrStart (148 + STRUCT_OFFSET)(%rdi)
#define dsMatchStart (152 + STRUCT_OFFSET)(%rdi)
#define dsLookahead (156 + STRUCT_OFFSET)(%rdi)
#define dsPrevLen (160 + STRUCT_OFFSET)(%rdi)
#define dsMaxChainLen (164 + STRUCT_OFFSET)(%rdi)
#define dsGoodMatch (180 + STRUCT_OFFSET)(%rdi)
#define dsNiceMatch (184 + STRUCT_OFFSET)(%rdi)
#endif
.text
/* uInt longest_match(deflate_state *deflatestate, IPos curmatch) */
longest_match:
/*
* Retrieve the function arguments. %curmatch will hold cur_match
* throughout the entire function (passed via rsi on amd64).
* rdi will hold the pointer to the deflate_state (first arg on amd64)
*/
mov %rsi, save_rsi
mov %rbx, save_rbx
mov %r12, save_r12
mov %r13, save_r13
mov %r14, save_r14
mov %r15, save_r15
/* uInt wmask = s->w_mask; */
/* unsigned chain_length = s->max_chain_length; */
/* if (s->prev_length >= s->good_match) { */
/* chain_length >>= 2; */
/* } */
movl dsPrevLen, %eax
movl dsGoodMatch, %ebx
cmpl %ebx, %eax
movl dsWMask, %eax
movl dsMaxChainLen, %chainlenwmask
jl LastMatchGood
shrl $2, %chainlenwmask
LastMatchGood:
/* chainlen is decremented once beforehand so that the function can */
/* use the sign flag instead of the zero flag for the exit test. */
/* It is then shifted into the high word, to make room for the wmask */
/* value, which it will always accompany. */
decl %chainlenwmask
shll $16, %chainlenwmask
orl %eax, %chainlenwmask
/* if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead; */
movl dsNiceMatch, %eax
movl dsLookahead, %ebx
cmpl %eax, %ebx
jl LookaheadLess
movl %eax, %ebx
LookaheadLess: movl %ebx, %nicematch
/* register Bytef *scan = s->window + s->strstart; */
mov dsWindow, %window
movl dsStrStart, %limitd
lea (%limit, %window), %scan
/* Determine how many bytes the scan ptr is off from being */
/* dword-aligned. */
mov %scan, %scanalign
negl %scanalignd
andl $3, %scanalignd
/* IPos limit = s->strstart > (IPos)MAX_DIST(s) ? */
/* s->strstart - (IPos)MAX_DIST(s) : NIL; */
movl dsWSize, %eax
subl $MIN_LOOKAHEAD, %eax
xorl %ecx, %ecx
subl %eax, %limitd
cmovng %ecx, %limitd
/* int best_len = s->prev_length; */
movl dsPrevLen, %bestlend
/* Store the sum of s->window + best_len in %windowbestlen locally, and in memory. */
lea (%window, %bestlen), %windowbestlen
mov %windowbestlen, _windowbestlen
/* register ush scan_start = *(ushf*)scan; */
/* register ush scan_end = *(ushf*)(scan+best_len-1); */
/* Posf *prev = s->prev; */
movzwl (%scan), %scanstart
movzwl -1(%scan, %bestlen), %scanend
mov dsPrev, %prev
/* Jump into the main loop. */
movl %chainlenwmask, _chainlenwmask
jmp LoopEntry
.balign 16
/* do {
* match = s->window + cur_match;
* if (*(ushf*)(match+best_len-1) != scan_end ||
* *(ushf*)match != scan_start) continue;
* [...]
* } while ((cur_match = prev[cur_match & wmask]) > limit
* && --chain_length != 0);
*
* Here is the inner loop of the function. The function will spend the
* majority of its time in this loop, and majority of that time will
* be spent in the first ten instructions.
*/
LookupLoop:
andl %chainlenwmask, %curmatchd
movzwl (%prev, %curmatch, 2), %curmatchd
cmpl %limitd, %curmatchd
jbe LeaveNow
subl $0x00010000, %chainlenwmask
js LeaveNow
LoopEntry: cmpw -1(%windowbestlen, %curmatch), %scanendw
jne LookupLoop
cmpw %scanstartw, (%window, %curmatch)
jne LookupLoop
/* Store the current value of chainlen. */
movl %chainlenwmask, _chainlenwmask
/* %scan is the string under scrutiny, and %prev to the string we */
/* are hoping to match it up with. In actuality, %esi and %edi are */
/* both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and %edx is */
/* initialized to -(MAX_MATCH_8 - scanalign). */
mov $(-MAX_MATCH_8), %rdx
lea (%curmatch, %window), %windowbestlen
lea MAX_MATCH_8(%windowbestlen, %scanalign), %windowbestlen
lea MAX_MATCH_8(%scan, %scanalign), %prev
/* the prefetching below makes very little difference... */
prefetcht1 (%windowbestlen, %rdx)
prefetcht1 (%prev, %rdx)
/*
* Test the strings for equality, 8 bytes at a time. At the end,
* adjust %rdx so that it is offset to the exact byte that mismatched.
*
* It should be confessed that this loop usually does not represent
* much of the total running time. Replacing it with a more
* straightforward "rep cmpsb" would not drastically degrade
* performance -- unrolling it, for example, makes no difference.
*/
#undef USE_SSE /* works, but is 6-7% slower, than non-SSE... */
LoopCmps:
#ifdef USE_SSE
/* Preload the SSE registers */
movdqu (%windowbestlen, %rdx), %xmm1
movdqu (%prev, %rdx), %xmm2
pcmpeqb %xmm2, %xmm1
movdqu 16(%windowbestlen, %rdx), %xmm3
movdqu 16(%prev, %rdx), %xmm4
pcmpeqb %xmm4, %xmm3
movdqu 32(%windowbestlen, %rdx), %xmm5
movdqu 32(%prev, %rdx), %xmm6
pcmpeqb %xmm6, %xmm5
movdqu 48(%windowbestlen, %rdx), %xmm7
movdqu 48(%prev, %rdx), %xmm8
pcmpeqb %xmm8, %xmm7
/* Check the comparisions' results */
pmovmskb %xmm1, %rax
notw %ax
bsfw %ax, %ax
jnz LeaveLoopCmps
/* this is the only iteration of the loop with a possibility of having
incremented rdx by 0x108 (each loop iteration add 16*4 = 0x40
and (0x40*4)+8=0x108 */
add $8, %rdx
jz LenMaximum
add $8, %rdx
pmovmskb %xmm3, %rax
notw %ax
bsfw %ax, %ax
jnz LeaveLoopCmps
add $16, %rdx
pmovmskb %xmm5, %rax
notw %ax
bsfw %ax, %ax
jnz LeaveLoopCmps
add $16, %rdx
pmovmskb %xmm7, %rax
notw %ax
bsfw %ax, %ax
jnz LeaveLoopCmps
add $16, %rdx
jmp LoopCmps
LeaveLoopCmps: add %rax, %rdx
#else
mov (%windowbestlen, %rdx), %rax
xor (%prev, %rdx), %rax
jnz LeaveLoopCmps
mov 8(%windowbestlen, %rdx), %rax
xor 8(%prev, %rdx), %rax
jnz LeaveLoopCmps8
mov 16(%windowbestlen, %rdx), %rax
xor 16(%prev, %rdx), %rax
jnz LeaveLoopCmps16
add $24, %rdx
jnz LoopCmps
jmp LenMaximum
# if 0
/*
* This three-liner is tantalizingly simple, but bsf is a slow instruction,
* and the complicated alternative down below is quite a bit faster. Sad...
*/
LeaveLoopCmps: bsf %rax, %rax /* find the first non-zero bit */
shrl $3, %eax /* divide by 8 to get the byte */
add %rax, %rdx
# else
LeaveLoopCmps16:
add $8, %rdx
LeaveLoopCmps8:
add $8, %rdx
LeaveLoopCmps: testl $0xFFFFFFFF, %eax /* Check the first 4 bytes */
jnz Check16
add $4, %rdx
shr $32, %rax
Check16: testw $0xFFFF, %ax
jnz LenLower
add $2, %rdx
shrl $16, %eax
LenLower: subb $1, %al
adc $0, %rdx
# endif
#endif
/* Calculate the length of the match. If it is longer than MAX_MATCH, */
/* then automatically accept it as the best possible match and leave. */
lea (%prev, %rdx), %rax
sub %scan, %rax
cmpl $MAX_MATCH, %eax
jge LenMaximum
/* If the length of the match is not longer than the best match we */
/* have so far, then forget it and return to the lookup loop. */
cmpl %bestlend, %eax
jg LongerMatch
mov _windowbestlen, %windowbestlen
mov dsPrev, %prev
movl _chainlenwmask, %edx
jmp LookupLoop
/* s->match_start = cur_match; */
/* best_len = len; */
/* if (len >= nice_match) break; */
/* scan_end = *(ushf*)(scan+best_len-1); */
LongerMatch:
movl %eax, %bestlend
movl %curmatchd, dsMatchStart
cmpl %nicematch, %eax
jge LeaveNow
lea (%window, %bestlen), %windowbestlen
mov %windowbestlen, _windowbestlen
movzwl -1(%scan, %rax), %scanend
mov dsPrev, %prev
movl _chainlenwmask, %chainlenwmask
jmp LookupLoop
/* Accept the current string, with the maximum possible length. */
LenMaximum:
movl $MAX_MATCH, %bestlend
movl %curmatchd, dsMatchStart
/* if ((uInt)best_len <= s->lookahead) return (uInt)best_len; */
/* return s->lookahead; */
LeaveNow:
movl dsLookahead, %eax
cmpl %eax, %bestlend
cmovngl %bestlend, %eax
LookaheadRet:
/* Restore the registers and return from whence we came. */
mov save_rsi, %rsi
mov save_rbx, %rbx
mov save_r12, %r12
mov save_r13, %r13
mov save_r14, %r14
mov save_r15, %r15
ret
match_init: ret

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This is a patched version of zlib, modified to use
Pentium-Pro-optimized assembly code in the deflation algorithm. The
files changed/added by this patch are:
README.686
match.S
The speedup that this patch provides varies, depending on whether the
compiler used to build the original version of zlib falls afoul of the
PPro's speed traps. My own tests show a speedup of around 10-20% at
the default compression level, and 20-30% using -9, against a version
compiled using gcc 2.7.2.3. Your mileage may vary.
Note that this code has been tailored for the PPro/PII in particular,
and will not perform particuarly well on a Pentium.
If you are using an assembler other than GNU as, you will have to
translate match.S to use your assembler's syntax. (Have fun.)
Brian Raiter
breadbox@muppetlabs.com
April, 1998
Added for zlib 1.1.3:
The patches come from
http://www.muppetlabs.com/~breadbox/software/assembly.html
To compile zlib with this asm file, copy match.S to the zlib directory
then do:
CFLAGS="-O3 -DASMV" ./configure
make OBJA=match.o
Update:
I've been ignoring these assembly routines for years, believing that
gcc's generated code had caught up with it sometime around gcc 2.95
and the major rearchitecting of the Pentium 4. However, I recently
learned that, despite what I believed, this code still has some life
in it. On the Pentium 4 and AMD64 chips, it continues to run about 8%
faster than the code produced by gcc 4.1.
In acknowledgement of its continuing usefulness, I've altered the
license to match that of the rest of zlib. Share and Enjoy!
Brian Raiter
breadbox@muppetlabs.com
April, 2007

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/* match.S -- x86 assembly version of the zlib longest_match() function.
* Optimized for the Intel 686 chips (PPro and later).
*
* Copyright (C) 1998, 2007 Brian Raiter <breadbox@muppetlabs.com>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the author be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef NO_UNDERLINE
#define match_init _match_init
#define longest_match _longest_match
#endif
#define MAX_MATCH (258)
#define MIN_MATCH (3)
#define MIN_LOOKAHEAD (MAX_MATCH + MIN_MATCH + 1)
#define MAX_MATCH_8 ((MAX_MATCH + 7) & ~7)
/* stack frame offsets */
#define chainlenwmask 0 /* high word: current chain len */
/* low word: s->wmask */
#define window 4 /* local copy of s->window */
#define windowbestlen 8 /* s->window + bestlen */
#define scanstart 16 /* first two bytes of string */
#define scanend 12 /* last two bytes of string */
#define scanalign 20 /* dword-misalignment of string */
#define nicematch 24 /* a good enough match size */
#define bestlen 28 /* size of best match so far */
#define scan 32 /* ptr to string wanting match */
#define LocalVarsSize (36)
/* saved ebx 36 */
/* saved edi 40 */
/* saved esi 44 */
/* saved ebp 48 */
/* return address 52 */
#define deflatestate 56 /* the function arguments */
#define curmatch 60
/* All the +zlib1222add offsets are due to the addition of fields
* in zlib in the deflate_state structure since the asm code was first written
* (if you compile with zlib 1.0.4 or older, use "zlib1222add equ (-4)").
* (if you compile with zlib between 1.0.5 and 1.2.2.1, use "zlib1222add equ 0").
* if you compile with zlib 1.2.2.2 or later , use "zlib1222add equ 8").
*/
#define zlib1222add (8)
#define dsWSize (36+zlib1222add)
#define dsWMask (44+zlib1222add)
#define dsWindow (48+zlib1222add)
#define dsPrev (56+zlib1222add)
#define dsMatchLen (88+zlib1222add)
#define dsPrevMatch (92+zlib1222add)
#define dsStrStart (100+zlib1222add)
#define dsMatchStart (104+zlib1222add)
#define dsLookahead (108+zlib1222add)
#define dsPrevLen (112+zlib1222add)
#define dsMaxChainLen (116+zlib1222add)
#define dsGoodMatch (132+zlib1222add)
#define dsNiceMatch (136+zlib1222add)
.file "match.S"
.globl match_init, longest_match
.text
/* uInt longest_match(deflate_state *deflatestate, IPos curmatch) */
.cfi_sections .debug_frame
longest_match:
.cfi_startproc
/* Save registers that the compiler may be using, and adjust %esp to */
/* make room for our stack frame. */
pushl %ebp
.cfi_def_cfa_offset 8
.cfi_offset ebp, -8
pushl %edi
.cfi_def_cfa_offset 12
pushl %esi
.cfi_def_cfa_offset 16
pushl %ebx
.cfi_def_cfa_offset 20
subl $LocalVarsSize, %esp
.cfi_def_cfa_offset LocalVarsSize+20
/* Retrieve the function arguments. %ecx will hold cur_match */
/* throughout the entire function. %edx will hold the pointer to the */
/* deflate_state structure during the function's setup (before */
/* entering the main loop). */
movl deflatestate(%esp), %edx
movl curmatch(%esp), %ecx
/* uInt wmask = s->w_mask; */
/* unsigned chain_length = s->max_chain_length; */
/* if (s->prev_length >= s->good_match) { */
/* chain_length >>= 2; */
/* } */
movl dsPrevLen(%edx), %eax
movl dsGoodMatch(%edx), %ebx
cmpl %ebx, %eax
movl dsWMask(%edx), %eax
movl dsMaxChainLen(%edx), %ebx
jl LastMatchGood
shrl $2, %ebx
LastMatchGood:
/* chainlen is decremented once beforehand so that the function can */
/* use the sign flag instead of the zero flag for the exit test. */
/* It is then shifted into the high word, to make room for the wmask */
/* value, which it will always accompany. */
decl %ebx
shll $16, %ebx
orl %eax, %ebx
movl %ebx, chainlenwmask(%esp)
/* if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead; */
movl dsNiceMatch(%edx), %eax
movl dsLookahead(%edx), %ebx
cmpl %eax, %ebx
jl LookaheadLess
movl %eax, %ebx
LookaheadLess: movl %ebx, nicematch(%esp)
/* register Bytef *scan = s->window + s->strstart; */
movl dsWindow(%edx), %esi
movl %esi, window(%esp)
movl dsStrStart(%edx), %ebp
lea (%esi,%ebp), %edi
movl %edi, scan(%esp)
/* Determine how many bytes the scan ptr is off from being */
/* dword-aligned. */
movl %edi, %eax
negl %eax
andl $3, %eax
movl %eax, scanalign(%esp)
/* IPos limit = s->strstart > (IPos)MAX_DIST(s) ? */
/* s->strstart - (IPos)MAX_DIST(s) : NIL; */
movl dsWSize(%edx), %eax
subl $MIN_LOOKAHEAD, %eax
subl %eax, %ebp
jg LimitPositive
xorl %ebp, %ebp
LimitPositive:
/* int best_len = s->prev_length; */
movl dsPrevLen(%edx), %eax
movl %eax, bestlen(%esp)
/* Store the sum of s->window + best_len in %esi locally, and in %esi. */
addl %eax, %esi
movl %esi, windowbestlen(%esp)
/* register ush scan_start = *(ushf*)scan; */
/* register ush scan_end = *(ushf*)(scan+best_len-1); */
/* Posf *prev = s->prev; */
movzwl (%edi), %ebx
movl %ebx, scanstart(%esp)
movzwl -1(%edi,%eax), %ebx
movl %ebx, scanend(%esp)
movl dsPrev(%edx), %edi
/* Jump into the main loop. */
movl chainlenwmask(%esp), %edx
jmp LoopEntry
.balign 16
/* do {
* match = s->window + cur_match;
* if (*(ushf*)(match+best_len-1) != scan_end ||
* *(ushf*)match != scan_start) continue;
* [...]
* } while ((cur_match = prev[cur_match & wmask]) > limit
* && --chain_length != 0);
*
* Here is the inner loop of the function. The function will spend the
* majority of its time in this loop, and majority of that time will
* be spent in the first ten instructions.
*
* Within this loop:
* %ebx = scanend
* %ecx = curmatch
* %edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
* %esi = windowbestlen - i.e., (window + bestlen)
* %edi = prev
* %ebp = limit
*/
LookupLoop:
andl %edx, %ecx
movzwl (%edi,%ecx,2), %ecx
cmpl %ebp, %ecx
jbe LeaveNow
subl $0x00010000, %edx
js LeaveNow
LoopEntry: movzwl -1(%esi,%ecx), %eax
cmpl %ebx, %eax
jnz LookupLoop
movl window(%esp), %eax
movzwl (%eax,%ecx), %eax
cmpl scanstart(%esp), %eax
jnz LookupLoop
/* Store the current value of chainlen. */
movl %edx, chainlenwmask(%esp)
/* Point %edi to the string under scrutiny, and %esi to the string we */
/* are hoping to match it up with. In actuality, %esi and %edi are */
/* both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and %edx is */
/* initialized to -(MAX_MATCH_8 - scanalign). */
movl window(%esp), %esi
movl scan(%esp), %edi
addl %ecx, %esi
movl scanalign(%esp), %eax
movl $(-MAX_MATCH_8), %edx
lea MAX_MATCH_8(%edi,%eax), %edi
lea MAX_MATCH_8(%esi,%eax), %esi
/* Test the strings for equality, 8 bytes at a time. At the end,
* adjust %edx so that it is offset to the exact byte that mismatched.
*
* We already know at this point that the first three bytes of the
* strings match each other, and they can be safely passed over before
* starting the compare loop. So what this code does is skip over 0-3
* bytes, as much as necessary in order to dword-align the %edi
* pointer. (%esi will still be misaligned three times out of four.)
*
* It should be confessed that this loop usually does not represent
* much of the total running time. Replacing it with a more
* straightforward "rep cmpsb" would not drastically degrade
* performance.
*/
LoopCmps:
movl (%esi,%edx), %eax
xorl (%edi,%edx), %eax
jnz LeaveLoopCmps
movl 4(%esi,%edx), %eax
xorl 4(%edi,%edx), %eax
jnz LeaveLoopCmps4
addl $8, %edx
jnz LoopCmps
jmp LenMaximum
LeaveLoopCmps4: addl $4, %edx
LeaveLoopCmps: testl $0x0000FFFF, %eax
jnz LenLower
addl $2, %edx
shrl $16, %eax
LenLower: subb $1, %al
adcl $0, %edx
/* Calculate the length of the match. If it is longer than MAX_MATCH, */
/* then automatically accept it as the best possible match and leave. */
lea (%edi,%edx), %eax
movl scan(%esp), %edi
subl %edi, %eax
cmpl $MAX_MATCH, %eax
jge LenMaximum
/* If the length of the match is not longer than the best match we */
/* have so far, then forget it and return to the lookup loop. */
movl deflatestate(%esp), %edx
movl bestlen(%esp), %ebx
cmpl %ebx, %eax
jg LongerMatch
movl windowbestlen(%esp), %esi
movl dsPrev(%edx), %edi
movl scanend(%esp), %ebx
movl chainlenwmask(%esp), %edx
jmp LookupLoop
/* s->match_start = cur_match; */
/* best_len = len; */
/* if (len >= nice_match) break; */
/* scan_end = *(ushf*)(scan+best_len-1); */
LongerMatch: movl nicematch(%esp), %ebx
movl %eax, bestlen(%esp)
movl %ecx, dsMatchStart(%edx)
cmpl %ebx, %eax
jge LeaveNow
movl window(%esp), %esi
addl %eax, %esi
movl %esi, windowbestlen(%esp)
movzwl -1(%edi,%eax), %ebx
movl dsPrev(%edx), %edi
movl %ebx, scanend(%esp)
movl chainlenwmask(%esp), %edx
jmp LookupLoop
/* Accept the current string, with the maximum possible length. */
LenMaximum: movl deflatestate(%esp), %edx
movl $MAX_MATCH, bestlen(%esp)
movl %ecx, dsMatchStart(%edx)
/* if ((uInt)best_len <= s->lookahead) return (uInt)best_len; */
/* return s->lookahead; */
LeaveNow:
movl deflatestate(%esp), %edx
movl bestlen(%esp), %ebx
movl dsLookahead(%edx), %eax
cmpl %eax, %ebx
jg LookaheadRet
movl %ebx, %eax
LookaheadRet:
/* Restore the stack and return from whence we came. */
addl $LocalVarsSize, %esp
.cfi_def_cfa_offset 20
popl %ebx
.cfi_def_cfa_offset 16
popl %esi
.cfi_def_cfa_offset 12
popl %edi
.cfi_def_cfa_offset 8
popl %ebp
.cfi_def_cfa_offset 4
.cfi_endproc
match_init: ret

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blast: blast.c blast.h
cc -DTEST -o blast blast.c
test: blast
blast < test.pk | cmp - test.txt
clean:
rm -f blast blast.o

4
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Read blast.h for purpose and usage.
Mark Adler
madler@alumni.caltech.edu

444
zlib/contrib/blast/blast.c Normal file
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/* blast.c
* Copyright (C) 2003 Mark Adler
* For conditions of distribution and use, see copyright notice in blast.h
* version 1.1, 16 Feb 2003
*
* blast.c decompresses data compressed by the PKWare Compression Library.
* This function provides functionality similar to the explode() function of
* the PKWare library, hence the name "blast".
*
* This decompressor is based on the excellent format description provided by
* Ben Rudiak-Gould in comp.compression on August 13, 2001. Interestingly, the
* example Ben provided in the post is incorrect. The distance 110001 should
* instead be 111000. When corrected, the example byte stream becomes:
*
* 00 04 82 24 25 8f 80 7f
*
* which decompresses to "AIAIAIAIAIAIA" (without the quotes).
*/
/*
* Change history:
*
* 1.0 12 Feb 2003 - First version
* 1.1 16 Feb 2003 - Fixed distance check for > 4 GB uncompressed data
*/
#include <setjmp.h> /* for setjmp(), longjmp(), and jmp_buf */
#include "blast.h" /* prototype for blast() */
#define local static /* for local function definitions */
#define MAXBITS 13 /* maximum code length */
#define MAXWIN 4096 /* maximum window size */
/* input and output state */
struct state {
/* input state */
blast_in infun; /* input function provided by user */
void *inhow; /* opaque information passed to infun() */
unsigned char *in; /* next input location */
unsigned left; /* available input at in */
int bitbuf; /* bit buffer */
int bitcnt; /* number of bits in bit buffer */
/* input limit error return state for bits() and decode() */
jmp_buf env;
/* output state */
blast_out outfun; /* output function provided by user */
void *outhow; /* opaque information passed to outfun() */
unsigned next; /* index of next write location in out[] */
int first; /* true to check distances (for first 4K) */
unsigned char out[MAXWIN]; /* output buffer and sliding window */
};
/*
* Return need bits from the input stream. This always leaves less than
* eight bits in the buffer. bits() works properly for need == 0.
*
* Format notes:
*
* - Bits are stored in bytes from the least significant bit to the most
* significant bit. Therefore bits are dropped from the bottom of the bit
* buffer, using shift right, and new bytes are appended to the top of the
* bit buffer, using shift left.
*/
local int bits(struct state *s, int need)
{
int val; /* bit accumulator */
/* load at least need bits into val */
val = s->bitbuf;
while (s->bitcnt < need) {
if (s->left == 0) {
s->left = s->infun(s->inhow, &(s->in));
if (s->left == 0) longjmp(s->env, 1); /* out of input */
}
val |= (int)(*(s->in)++) << s->bitcnt; /* load eight bits */
s->left--;
s->bitcnt += 8;
}
/* drop need bits and update buffer, always zero to seven bits left */
s->bitbuf = val >> need;
s->bitcnt -= need;
/* return need bits, zeroing the bits above that */
return val & ((1 << need) - 1);
}
/*
* Huffman code decoding tables. count[1..MAXBITS] is the number of symbols of
* each length, which for a canonical code are stepped through in order.
* symbol[] are the symbol values in canonical order, where the number of
* entries is the sum of the counts in count[]. The decoding process can be
* seen in the function decode() below.
*/
struct huffman {
short *count; /* number of symbols of each length */
short *symbol; /* canonically ordered symbols */
};
/*
* Decode a code from the stream s using huffman table h. Return the symbol or
* a negative value if there is an error. If all of the lengths are zero, i.e.
* an empty code, or if the code is incomplete and an invalid code is received,
* then -9 is returned after reading MAXBITS bits.
*
* Format notes:
*
* - The codes as stored in the compressed data are bit-reversed relative to
* a simple integer ordering of codes of the same lengths. Hence below the
* bits are pulled from the compressed data one at a time and used to
* build the code value reversed from what is in the stream in order to
* permit simple integer comparisons for decoding.
*
* - The first code for the shortest length is all ones. Subsequent codes of
* the same length are simply integer decrements of the previous code. When
* moving up a length, a one bit is appended to the code. For a complete
* code, the last code of the longest length will be all zeros. To support
* this ordering, the bits pulled during decoding are inverted to apply the
* more "natural" ordering starting with all zeros and incrementing.
*/
local int decode(struct state *s, struct huffman *h)
{
int len; /* current number of bits in code */
int code; /* len bits being decoded */
int first; /* first code of length len */
int count; /* number of codes of length len */
int index; /* index of first code of length len in symbol table */
int bitbuf; /* bits from stream */
int left; /* bits left in next or left to process */
short *next; /* next number of codes */
bitbuf = s->bitbuf;
left = s->bitcnt;
code = first = index = 0;
len = 1;
next = h->count + 1;
while (1) {
while (left--) {
code |= (bitbuf & 1) ^ 1; /* invert code */
bitbuf >>= 1;
count = *next++;
if (code < first + count) { /* if length len, return symbol */
s->bitbuf = bitbuf;
s->bitcnt = (s->bitcnt - len) & 7;
return h->symbol[index + (code - first)];
}
index += count; /* else update for next length */
first += count;
first <<= 1;
code <<= 1;
len++;
}
left = (MAXBITS+1) - len;
if (left == 0) break;
if (s->left == 0) {
s->left = s->infun(s->inhow, &(s->in));
if (s->left == 0) longjmp(s->env, 1); /* out of input */
}
bitbuf = *(s->in)++;
s->left--;
if (left > 8) left = 8;
}
return -9; /* ran out of codes */
}
/*
* Given a list of repeated code lengths rep[0..n-1], where each byte is a
* count (high four bits + 1) and a code length (low four bits), generate the
* list of code lengths. This compaction reduces the size of the object code.
* Then given the list of code lengths length[0..n-1] representing a canonical
* Huffman code for n symbols, construct the tables required to decode those
* codes. Those tables are the number of codes of each length, and the symbols
* sorted by length, retaining their original order within each length. The
* return value is zero for a complete code set, negative for an over-
* subscribed code set, and positive for an incomplete code set. The tables
* can be used if the return value is zero or positive, but they cannot be used
* if the return value is negative. If the return value is zero, it is not
* possible for decode() using that table to return an error--any stream of
* enough bits will resolve to a symbol. If the return value is positive, then
* it is possible for decode() using that table to return an error for received
* codes past the end of the incomplete lengths.
*/
local int construct(struct huffman *h, const unsigned char *rep, int n)
{
int symbol; /* current symbol when stepping through length[] */
int len; /* current length when stepping through h->count[] */
int left; /* number of possible codes left of current length */
short offs[MAXBITS+1]; /* offsets in symbol table for each length */
short length[256]; /* code lengths */
/* convert compact repeat counts into symbol bit length list */
symbol = 0;
do {
len = *rep++;
left = (len >> 4) + 1;
len &= 15;
do {
length[symbol++] = len;
} while (--left);
} while (--n);
n = symbol;
/* count number of codes of each length */
for (len = 0; len <= MAXBITS; len++)
h->count[len] = 0;
for (symbol = 0; symbol < n; symbol++)
(h->count[length[symbol]])++; /* assumes lengths are within bounds */
if (h->count[0] == n) /* no codes! */
return 0; /* complete, but decode() will fail */
/* check for an over-subscribed or incomplete set of lengths */
left = 1; /* one possible code of zero length */
for (len = 1; len <= MAXBITS; len++) {
left <<= 1; /* one more bit, double codes left */
left -= h->count[len]; /* deduct count from possible codes */
if (left < 0) return left; /* over-subscribed--return negative */
} /* left > 0 means incomplete */
/* generate offsets into symbol table for each length for sorting */
offs[1] = 0;
for (len = 1; len < MAXBITS; len++)
offs[len + 1] = offs[len] + h->count[len];
/*
* put symbols in table sorted by length, by symbol order within each
* length
*/
for (symbol = 0; symbol < n; symbol++)
if (length[symbol] != 0)
h->symbol[offs[length[symbol]]++] = symbol;
/* return zero for complete set, positive for incomplete set */
return left;
}
/*
* Decode PKWare Compression Library stream.
*
* Format notes:
*
* - First byte is 0 if literals are uncoded or 1 if they are coded. Second
* byte is 4, 5, or 6 for the number of extra bits in the distance code.
* This is the base-2 logarithm of the dictionary size minus six.
*
* - Compressed data is a combination of literals and length/distance pairs
* terminated by an end code. Literals are either Huffman coded or
* uncoded bytes. A length/distance pair is a coded length followed by a
* coded distance to represent a string that occurs earlier in the
* uncompressed data that occurs again at the current location.
*
* - A bit preceding a literal or length/distance pair indicates which comes
* next, 0 for literals, 1 for length/distance.
*
* - If literals are uncoded, then the next eight bits are the literal, in the
* normal bit order in th stream, i.e. no bit-reversal is needed. Similarly,
* no bit reversal is needed for either the length extra bits or the distance
* extra bits.
*
* - Literal bytes are simply written to the output. A length/distance pair is
* an instruction to copy previously uncompressed bytes to the output. The
* copy is from distance bytes back in the output stream, copying for length
* bytes.
*
* - Distances pointing before the beginning of the output data are not
* permitted.
*
* - Overlapped copies, where the length is greater than the distance, are
* allowed and common. For example, a distance of one and a length of 518
* simply copies the last byte 518 times. A distance of four and a length of
* twelve copies the last four bytes three times. A simple forward copy
* ignoring whether the length is greater than the distance or not implements
* this correctly.
*/
local int decomp(struct state *s)
{
int lit; /* true if literals are coded */
int dict; /* log2(dictionary size) - 6 */
int symbol; /* decoded symbol, extra bits for distance */
int len; /* length for copy */
int dist; /* distance for copy */
int copy; /* copy counter */
unsigned char *from, *to; /* copy pointers */
static int virgin = 1; /* build tables once */
static short litcnt[MAXBITS+1], litsym[256]; /* litcode memory */
static short lencnt[MAXBITS+1], lensym[16]; /* lencode memory */
static short distcnt[MAXBITS+1], distsym[64]; /* distcode memory */
static struct huffman litcode = {litcnt, litsym}; /* length code */
static struct huffman lencode = {lencnt, lensym}; /* length code */
static struct huffman distcode = {distcnt, distsym};/* distance code */
/* bit lengths of literal codes */
static const unsigned char litlen[] = {
11, 124, 8, 7, 28, 7, 188, 13, 76, 4, 10, 8, 12, 10, 12, 10, 8, 23, 8,
9, 7, 6, 7, 8, 7, 6, 55, 8, 23, 24, 12, 11, 7, 9, 11, 12, 6, 7, 22, 5,
7, 24, 6, 11, 9, 6, 7, 22, 7, 11, 38, 7, 9, 8, 25, 11, 8, 11, 9, 12,
8, 12, 5, 38, 5, 38, 5, 11, 7, 5, 6, 21, 6, 10, 53, 8, 7, 24, 10, 27,
44, 253, 253, 253, 252, 252, 252, 13, 12, 45, 12, 45, 12, 61, 12, 45,
44, 173};
/* bit lengths of length codes 0..15 */
static const unsigned char lenlen[] = {2, 35, 36, 53, 38, 23};
/* bit lengths of distance codes 0..63 */
static const unsigned char distlen[] = {2, 20, 53, 230, 247, 151, 248};
static const short base[16] = { /* base for length codes */
3, 2, 4, 5, 6, 7, 8, 9, 10, 12, 16, 24, 40, 72, 136, 264};
static const char extra[16] = { /* extra bits for length codes */
0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8};
/* set up decoding tables (once--might not be thread-safe) */
if (virgin) {
construct(&litcode, litlen, sizeof(litlen));
construct(&lencode, lenlen, sizeof(lenlen));
construct(&distcode, distlen, sizeof(distlen));
virgin = 0;
}
/* read header */
lit = bits(s, 8);
if (lit > 1) return -1;
dict = bits(s, 8);
if (dict < 4 || dict > 6) return -2;
/* decode literals and length/distance pairs */
do {
if (bits(s, 1)) {
/* get length */
symbol = decode(s, &lencode);
len = base[symbol] + bits(s, extra[symbol]);
if (len == 519) break; /* end code */
/* get distance */
symbol = len == 2 ? 2 : dict;
dist = decode(s, &distcode) << symbol;
dist += bits(s, symbol);
dist++;
if (s->first && dist > s->next)
return -3; /* distance too far back */
/* copy length bytes from distance bytes back */
do {
to = s->out + s->next;
from = to - dist;
copy = MAXWIN;
if (s->next < dist) {
from += copy;
copy = dist;
}
copy -= s->next;
if (copy > len) copy = len;
len -= copy;
s->next += copy;
do {
*to++ = *from++;
} while (--copy);
if (s->next == MAXWIN) {
if (s->outfun(s->outhow, s->out, s->next)) return 1;
s->next = 0;
s->first = 0;
}
} while (len != 0);
}
else {
/* get literal and write it */
symbol = lit ? decode(s, &litcode) : bits(s, 8);
s->out[s->next++] = symbol;
if (s->next == MAXWIN) {
if (s->outfun(s->outhow, s->out, s->next)) return 1;
s->next = 0;
s->first = 0;
}
}
} while (1);
return 0;
}
/* See comments in blast.h */
int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow)
{
struct state s; /* input/output state */
int err; /* return value */
/* initialize input state */
s.infun = infun;
s.inhow = inhow;
s.left = 0;
s.bitbuf = 0;
s.bitcnt = 0;
/* initialize output state */
s.outfun = outfun;
s.outhow = outhow;
s.next = 0;
s.first = 1;
/* return if bits() or decode() tries to read past available input */
if (setjmp(s.env) != 0) /* if came back here via longjmp(), */
err = 2; /* then skip decomp(), return error */
else
err = decomp(&s); /* decompress */
/* write any leftover output and update the error code if needed */
if (err != 1 && s.next && s.outfun(s.outhow, s.out, s.next) && err == 0)
err = 1;
return err;
}
#ifdef TEST
/* Example of how to use blast() */
#include <stdio.h>
#include <stdlib.h>
#define CHUNK 16384
local unsigned inf(void *how, unsigned char **buf)
{
static unsigned char hold[CHUNK];
*buf = hold;
return fread(hold, 1, CHUNK, (FILE *)how);
}
local int outf(void *how, unsigned char *buf, unsigned len)
{
return fwrite(buf, 1, len, (FILE *)how) != len;
}
/* Decompress a PKWare Compression Library stream from stdin to stdout */
int main(void)
{
int ret, n;
/* decompress to stdout */
ret = blast(inf, stdin, outf, stdout);
if (ret != 0) fprintf(stderr, "blast error: %d\n", ret);
/* see if there are any leftover bytes */
n = 0;
while (getchar() != EOF) n++;
if (n) fprintf(stderr, "blast warning: %d unused bytes of input\n", n);
/* return blast() error code */
return ret;
}
#endif

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/* blast.h -- interface for blast.c
Copyright (C) 2003 Mark Adler
version 1.1, 16 Feb 2003
This software is provided 'as-is', without any express or implied
warranty. In no event will the author be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Mark Adler madler@alumni.caltech.edu
*/
/*
* blast() decompresses the PKWare Data Compression Library (DCL) compressed
* format. It provides the same functionality as the explode() function in
* that library. (Note: PKWare overused the "implode" verb, and the format
* used by their library implode() function is completely different and
* incompatible with the implode compression method supported by PKZIP.)
*/
typedef unsigned (*blast_in)(void *how, unsigned char **buf);
typedef int (*blast_out)(void *how, unsigned char *buf, unsigned len);
/* Definitions for input/output functions passed to blast(). See below for
* what the provided functions need to do.
*/
int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow);
/* Decompress input to output using the provided infun() and outfun() calls.
* On success, the return value of blast() is zero. If there is an error in
* the source data, i.e. it is not in the proper format, then a negative value
* is returned. If there is not enough input available or there is not enough
* output space, then a positive error is returned.
*
* The input function is invoked: len = infun(how, &buf), where buf is set by
* infun() to point to the input buffer, and infun() returns the number of
* available bytes there. If infun() returns zero, then blast() returns with
* an input error. (blast() only asks for input if it needs it.) inhow is for
* use by the application to pass an input descriptor to infun(), if desired.
*
* The output function is invoked: err = outfun(how, buf, len), where the bytes
* to be written are buf[0..len-1]. If err is not zero, then blast() returns
* with an output error. outfun() is always called with len <= 4096. outhow
* is for use by the application to pass an output descriptor to outfun(), if
* desired.
*
* The return codes are:
*
* 2: ran out of input before completing decompression
* 1: output error before completing decompression
* 0: successful decompression
* -1: literal flag not zero or one
* -2: dictionary size not in 4..6
* -3: distance is too far back
*
* At the bottom of blast.c is an example program that uses blast() that can be
* compiled to produce a command-line decompression filter by defining TEST.
*/

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AIAIAIAIAIAIA

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{*******************************************************}
{ }
{ Borland Delphi Supplemental Components }
{ ZLIB Data Compression Interface Unit }
{ }
{ Copyright (c) 1997,99 Borland Corporation }
{ }
{*******************************************************}
{ Updated for zlib 1.2.x by Cosmin Truta <cosmint@cs.ubbcluj.ro> }
unit ZLib;
interface
uses SysUtils, Classes;
type
TAlloc = function (AppData: Pointer; Items, Size: Integer): Pointer; cdecl;
TFree = procedure (AppData, Block: Pointer); cdecl;
// Internal structure. Ignore.
TZStreamRec = packed record
next_in: PChar; // next input byte
avail_in: Integer; // number of bytes available at next_in
total_in: Longint; // total nb of input bytes read so far
next_out: PChar; // next output byte should be put here
avail_out: Integer; // remaining free space at next_out
total_out: Longint; // total nb of bytes output so far
msg: PChar; // last error message, NULL if no error
internal: Pointer; // not visible by applications
zalloc: TAlloc; // used to allocate the internal state
zfree: TFree; // used to free the internal state
AppData: Pointer; // private data object passed to zalloc and zfree
data_type: Integer; // best guess about the data type: ascii or binary
adler: Longint; // adler32 value of the uncompressed data
reserved: Longint; // reserved for future use
end;
// Abstract ancestor class
TCustomZlibStream = class(TStream)
private
FStrm: TStream;
FStrmPos: Integer;
FOnProgress: TNotifyEvent;
FZRec: TZStreamRec;
FBuffer: array [Word] of Char;
protected
procedure Progress(Sender: TObject); dynamic;
property OnProgress: TNotifyEvent read FOnProgress write FOnProgress;
constructor Create(Strm: TStream);
end;
{ TCompressionStream compresses data on the fly as data is written to it, and
stores the compressed data to another stream.
TCompressionStream is write-only and strictly sequential. Reading from the
stream will raise an exception. Using Seek to move the stream pointer
will raise an exception.
Output data is cached internally, written to the output stream only when
the internal output buffer is full. All pending output data is flushed
when the stream is destroyed.
The Position property returns the number of uncompressed bytes of
data that have been written to the stream so far.
CompressionRate returns the on-the-fly percentage by which the original
data has been compressed: (1 - (CompressedBytes / UncompressedBytes)) * 100
If raw data size = 100 and compressed data size = 25, the CompressionRate
is 75%
The OnProgress event is called each time the output buffer is filled and
written to the output stream. This is useful for updating a progress
indicator when you are writing a large chunk of data to the compression
stream in a single call.}
TCompressionLevel = (clNone, clFastest, clDefault, clMax);
TCompressionStream = class(TCustomZlibStream)
private
function GetCompressionRate: Single;
public
constructor Create(CompressionLevel: TCompressionLevel; Dest: TStream);
destructor Destroy; override;
function Read(var Buffer; Count: Longint): Longint; override;
function Write(const Buffer; Count: Longint): Longint; override;
function Seek(Offset: Longint; Origin: Word): Longint; override;
property CompressionRate: Single read GetCompressionRate;
property OnProgress;
end;
{ TDecompressionStream decompresses data on the fly as data is read from it.
Compressed data comes from a separate source stream. TDecompressionStream
is read-only and unidirectional; you can seek forward in the stream, but not
backwards. The special case of setting the stream position to zero is
allowed. Seeking forward decompresses data until the requested position in
the uncompressed data has been reached. Seeking backwards, seeking relative
to the end of the stream, requesting the size of the stream, and writing to
the stream will raise an exception.
The Position property returns the number of bytes of uncompressed data that
have been read from the stream so far.
The OnProgress event is called each time the internal input buffer of
compressed data is exhausted and the next block is read from the input stream.
This is useful for updating a progress indicator when you are reading a
large chunk of data from the decompression stream in a single call.}
TDecompressionStream = class(TCustomZlibStream)
public
constructor Create(Source: TStream);
destructor Destroy; override;
function Read(var Buffer; Count: Longint): Longint; override;
function Write(const Buffer; Count: Longint): Longint; override;
function Seek(Offset: Longint; Origin: Word): Longint; override;
property OnProgress;
end;
{ CompressBuf compresses data, buffer to buffer, in one call.
In: InBuf = ptr to compressed data
InBytes = number of bytes in InBuf
Out: OutBuf = ptr to newly allocated buffer containing decompressed data
OutBytes = number of bytes in OutBuf }
procedure CompressBuf(const InBuf: Pointer; InBytes: Integer;
out OutBuf: Pointer; out OutBytes: Integer);
{ DecompressBuf decompresses data, buffer to buffer, in one call.
In: InBuf = ptr to compressed data
InBytes = number of bytes in InBuf
OutEstimate = zero, or est. size of the decompressed data
Out: OutBuf = ptr to newly allocated buffer containing decompressed data
OutBytes = number of bytes in OutBuf }
procedure DecompressBuf(const InBuf: Pointer; InBytes: Integer;
OutEstimate: Integer; out OutBuf: Pointer; out OutBytes: Integer);
{ DecompressToUserBuf decompresses data, buffer to buffer, in one call.
In: InBuf = ptr to compressed data
InBytes = number of bytes in InBuf
Out: OutBuf = ptr to user-allocated buffer to contain decompressed data
BufSize = number of bytes in OutBuf }
procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer;
const OutBuf: Pointer; BufSize: Integer);
const
zlib_version = '1.2.7';
type
EZlibError = class(Exception);
ECompressionError = class(EZlibError);
EDecompressionError = class(EZlibError);
implementation
uses ZLibConst;
const
Z_NO_FLUSH = 0;
Z_PARTIAL_FLUSH = 1;
Z_SYNC_FLUSH = 2;
Z_FULL_FLUSH = 3;
Z_FINISH = 4;
Z_OK = 0;
Z_STREAM_END = 1;
Z_NEED_DICT = 2;
Z_ERRNO = (-1);
Z_STREAM_ERROR = (-2);
Z_DATA_ERROR = (-3);
Z_MEM_ERROR = (-4);
Z_BUF_ERROR = (-5);
Z_VERSION_ERROR = (-6);
Z_NO_COMPRESSION = 0;
Z_BEST_SPEED = 1;
Z_BEST_COMPRESSION = 9;
Z_DEFAULT_COMPRESSION = (-1);
Z_FILTERED = 1;
Z_HUFFMAN_ONLY = 2;
Z_RLE = 3;
Z_DEFAULT_STRATEGY = 0;
Z_BINARY = 0;
Z_ASCII = 1;
Z_UNKNOWN = 2;
Z_DEFLATED = 8;
{$L adler32.obj}
{$L compress.obj}
{$L crc32.obj}
{$L deflate.obj}
{$L infback.obj}
{$L inffast.obj}
{$L inflate.obj}
{$L inftrees.obj}
{$L trees.obj}
{$L uncompr.obj}
{$L zutil.obj}
procedure adler32; external;
procedure compressBound; external;
procedure crc32; external;
procedure deflateInit2_; external;
procedure deflateParams; external;
function _malloc(Size: Integer): Pointer; cdecl;
begin
Result := AllocMem(Size);
end;
procedure _free(Block: Pointer); cdecl;
begin
FreeMem(Block);
end;
procedure _memset(P: Pointer; B: Byte; count: Integer); cdecl;
begin
FillChar(P^, count, B);
end;
procedure _memcpy(dest, source: Pointer; count: Integer); cdecl;
begin
Move(source^, dest^, count);
end;
// deflate compresses data
function deflateInit_(var strm: TZStreamRec; level: Integer; version: PChar;
recsize: Integer): Integer; external;
function deflate(var strm: TZStreamRec; flush: Integer): Integer; external;
function deflateEnd(var strm: TZStreamRec): Integer; external;
// inflate decompresses data
function inflateInit_(var strm: TZStreamRec; version: PChar;
recsize: Integer): Integer; external;
function inflate(var strm: TZStreamRec; flush: Integer): Integer; external;
function inflateEnd(var strm: TZStreamRec): Integer; external;
function inflateReset(var strm: TZStreamRec): Integer; external;
function zlibAllocMem(AppData: Pointer; Items, Size: Integer): Pointer; cdecl;
begin
// GetMem(Result, Items*Size);
Result := AllocMem(Items * Size);
end;
procedure zlibFreeMem(AppData, Block: Pointer); cdecl;
begin
FreeMem(Block);
end;
{function zlibCheck(code: Integer): Integer;
begin
Result := code;
if code < 0 then
raise EZlibError.Create('error'); //!!
end;}
function CCheck(code: Integer): Integer;
begin
Result := code;
if code < 0 then
raise ECompressionError.Create('error'); //!!
end;
function DCheck(code: Integer): Integer;
begin
Result := code;
if code < 0 then
raise EDecompressionError.Create('error'); //!!
end;
procedure CompressBuf(const InBuf: Pointer; InBytes: Integer;
out OutBuf: Pointer; out OutBytes: Integer);
var
strm: TZStreamRec;
P: Pointer;
begin
FillChar(strm, sizeof(strm), 0);
strm.zalloc := zlibAllocMem;
strm.zfree := zlibFreeMem;
OutBytes := ((InBytes + (InBytes div 10) + 12) + 255) and not 255;
GetMem(OutBuf, OutBytes);
try
strm.next_in := InBuf;
strm.avail_in := InBytes;
strm.next_out := OutBuf;
strm.avail_out := OutBytes;
CCheck(deflateInit_(strm, Z_BEST_COMPRESSION, zlib_version, sizeof(strm)));
try
while CCheck(deflate(strm, Z_FINISH)) <> Z_STREAM_END do
begin
P := OutBuf;
Inc(OutBytes, 256);
ReallocMem(OutBuf, OutBytes);
strm.next_out := PChar(Integer(OutBuf) + (Integer(strm.next_out) - Integer(P)));
strm.avail_out := 256;
end;
finally
CCheck(deflateEnd(strm));
end;
ReallocMem(OutBuf, strm.total_out);
OutBytes := strm.total_out;
except
FreeMem(OutBuf);
raise
end;
end;
procedure DecompressBuf(const InBuf: Pointer; InBytes: Integer;
OutEstimate: Integer; out OutBuf: Pointer; out OutBytes: Integer);
var
strm: TZStreamRec;
P: Pointer;
BufInc: Integer;
begin
FillChar(strm, sizeof(strm), 0);
strm.zalloc := zlibAllocMem;
strm.zfree := zlibFreeMem;
BufInc := (InBytes + 255) and not 255;
if OutEstimate = 0 then
OutBytes := BufInc
else
OutBytes := OutEstimate;
GetMem(OutBuf, OutBytes);
try
strm.next_in := InBuf;
strm.avail_in := InBytes;
strm.next_out := OutBuf;
strm.avail_out := OutBytes;
DCheck(inflateInit_(strm, zlib_version, sizeof(strm)));
try
while DCheck(inflate(strm, Z_NO_FLUSH)) <> Z_STREAM_END do
begin
P := OutBuf;
Inc(OutBytes, BufInc);
ReallocMem(OutBuf, OutBytes);
strm.next_out := PChar(Integer(OutBuf) + (Integer(strm.next_out) - Integer(P)));
strm.avail_out := BufInc;
end;
finally
DCheck(inflateEnd(strm));
end;
ReallocMem(OutBuf, strm.total_out);
OutBytes := strm.total_out;
except
FreeMem(OutBuf);
raise
end;
end;
procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer;
const OutBuf: Pointer; BufSize: Integer);
var
strm: TZStreamRec;
begin
FillChar(strm, sizeof(strm), 0);
strm.zalloc := zlibAllocMem;
strm.zfree := zlibFreeMem;
strm.next_in := InBuf;
strm.avail_in := InBytes;
strm.next_out := OutBuf;
strm.avail_out := BufSize;
DCheck(inflateInit_(strm, zlib_version, sizeof(strm)));
try
if DCheck(inflate(strm, Z_FINISH)) <> Z_STREAM_END then
raise EZlibError.CreateRes(@sTargetBufferTooSmall);
finally
DCheck(inflateEnd(strm));
end;
end;
// TCustomZlibStream
constructor TCustomZLibStream.Create(Strm: TStream);
begin
inherited Create;
FStrm := Strm;
FStrmPos := Strm.Position;
FZRec.zalloc := zlibAllocMem;
FZRec.zfree := zlibFreeMem;
end;
procedure TCustomZLibStream.Progress(Sender: TObject);
begin
if Assigned(FOnProgress) then FOnProgress(Sender);
end;
// TCompressionStream
constructor TCompressionStream.Create(CompressionLevel: TCompressionLevel;
Dest: TStream);
const
Levels: array [TCompressionLevel] of ShortInt =
(Z_NO_COMPRESSION, Z_BEST_SPEED, Z_DEFAULT_COMPRESSION, Z_BEST_COMPRESSION);
begin
inherited Create(Dest);
FZRec.next_out := FBuffer;
FZRec.avail_out := sizeof(FBuffer);
CCheck(deflateInit_(FZRec, Levels[CompressionLevel], zlib_version, sizeof(FZRec)));
end;
destructor TCompressionStream.Destroy;
begin
FZRec.next_in := nil;
FZRec.avail_in := 0;
try
if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos;
while (CCheck(deflate(FZRec, Z_FINISH)) <> Z_STREAM_END)
and (FZRec.avail_out = 0) do
begin
FStrm.WriteBuffer(FBuffer, sizeof(FBuffer));
FZRec.next_out := FBuffer;
FZRec.avail_out := sizeof(FBuffer);
end;
if FZRec.avail_out < sizeof(FBuffer) then
FStrm.WriteBuffer(FBuffer, sizeof(FBuffer) - FZRec.avail_out);
finally
deflateEnd(FZRec);
end;
inherited Destroy;
end;
function TCompressionStream.Read(var Buffer; Count: Longint): Longint;
begin
raise ECompressionError.CreateRes(@sInvalidStreamOp);
end;
function TCompressionStream.Write(const Buffer; Count: Longint): Longint;
begin
FZRec.next_in := @Buffer;
FZRec.avail_in := Count;
if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos;
while (FZRec.avail_in > 0) do
begin
CCheck(deflate(FZRec, 0));
if FZRec.avail_out = 0 then
begin
FStrm.WriteBuffer(FBuffer, sizeof(FBuffer));
FZRec.next_out := FBuffer;
FZRec.avail_out := sizeof(FBuffer);
FStrmPos := FStrm.Position;
Progress(Self);
end;
end;
Result := Count;
end;
function TCompressionStream.Seek(Offset: Longint; Origin: Word): Longint;
begin
if (Offset = 0) and (Origin = soFromCurrent) then
Result := FZRec.total_in
else
raise ECompressionError.CreateRes(@sInvalidStreamOp);
end;
function TCompressionStream.GetCompressionRate: Single;
begin
if FZRec.total_in = 0 then
Result := 0
else
Result := (1.0 - (FZRec.total_out / FZRec.total_in)) * 100.0;
end;
// TDecompressionStream
constructor TDecompressionStream.Create(Source: TStream);
begin
inherited Create(Source);
FZRec.next_in := FBuffer;
FZRec.avail_in := 0;
DCheck(inflateInit_(FZRec, zlib_version, sizeof(FZRec)));
end;
destructor TDecompressionStream.Destroy;
begin
FStrm.Seek(-FZRec.avail_in, 1);
inflateEnd(FZRec);
inherited Destroy;
end;
function TDecompressionStream.Read(var Buffer; Count: Longint): Longint;
begin
FZRec.next_out := @Buffer;
FZRec.avail_out := Count;
if FStrm.Position <> FStrmPos then FStrm.Position := FStrmPos;
while (FZRec.avail_out > 0) do
begin
if FZRec.avail_in = 0 then
begin
FZRec.avail_in := FStrm.Read(FBuffer, sizeof(FBuffer));
if FZRec.avail_in = 0 then
begin
Result := Count - FZRec.avail_out;
Exit;
end;
FZRec.next_in := FBuffer;
FStrmPos := FStrm.Position;
Progress(Self);
end;
CCheck(inflate(FZRec, 0));
end;
Result := Count;
end;
function TDecompressionStream.Write(const Buffer; Count: Longint): Longint;
begin
raise EDecompressionError.CreateRes(@sInvalidStreamOp);
end;
function TDecompressionStream.Seek(Offset: Longint; Origin: Word): Longint;
var
I: Integer;
Buf: array [0..4095] of Char;
begin
if (Offset = 0) and (Origin = soFromBeginning) then
begin
DCheck(inflateReset(FZRec));
FZRec.next_in := FBuffer;
FZRec.avail_in := 0;
FStrm.Position := 0;
FStrmPos := 0;
end
else if ( (Offset >= 0) and (Origin = soFromCurrent)) or
( ((Offset - FZRec.total_out) > 0) and (Origin = soFromBeginning)) then
begin
if Origin = soFromBeginning then Dec(Offset, FZRec.total_out);
if Offset > 0 then
begin
for I := 1 to Offset div sizeof(Buf) do
ReadBuffer(Buf, sizeof(Buf));
ReadBuffer(Buf, Offset mod sizeof(Buf));
end;
end
else
raise EDecompressionError.CreateRes(@sInvalidStreamOp);
Result := FZRec.total_out;
end;
end.

11
zlib/contrib/delphi/ZLibConst.pas Normal file
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unit ZLibConst;
interface
resourcestring
sTargetBufferTooSmall = 'ZLib error: target buffer may be too small';
sInvalidStreamOp = 'Invalid stream operation';
implementation
end.

76
zlib/contrib/delphi/readme.txt Normal file
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Overview
========
This directory contains an update to the ZLib interface unit,
distributed by Borland as a Delphi supplemental component.
The original ZLib unit is Copyright (c) 1997,99 Borland Corp.,
and is based on zlib version 1.0.4. There are a series of bugs
and security problems associated with that old zlib version, and
we recommend the users to update their ZLib unit.
Summary of modifications
========================
- Improved makefile, adapted to zlib version 1.2.1.
- Some field types from TZStreamRec are changed from Integer to
Longint, for consistency with the zlib.h header, and for 64-bit
readiness.
- The zlib_version constant is updated.
- The new Z_RLE strategy has its corresponding symbolic constant.
- The allocation and deallocation functions and function types
(TAlloc, TFree, zlibAllocMem and zlibFreeMem) are now cdecl,
and _malloc and _free are added as C RTL stubs. As a result,
the original C sources of zlib can be compiled out of the box,
and linked to the ZLib unit.
Suggestions for improvements
============================
Currently, the ZLib unit provides only a limited wrapper around
the zlib library, and much of the original zlib functionality is
missing. Handling compressed file formats like ZIP/GZIP or PNG
cannot be implemented without having this functionality.
Applications that handle these formats are either using their own,
duplicated code, or not using the ZLib unit at all.
Here are a few suggestions:
- Checksum class wrappers around adler32() and crc32(), similar
to the Java classes that implement the java.util.zip.Checksum
interface.
- The ability to read and write raw deflate streams, without the
zlib stream header and trailer. Raw deflate streams are used
in the ZIP file format.
- The ability to read and write gzip streams, used in the GZIP
file format, and normally produced by the gzip program.
- The ability to select a different compression strategy, useful
to PNG and MNG image compression, and to multimedia compression
in general. Besides the compression level
TCompressionLevel = (clNone, clFastest, clDefault, clMax);
which, in fact, could have used the 'z' prefix and avoided
TColor-like symbols
TCompressionLevel = (zcNone, zcFastest, zcDefault, zcMax);
there could be a compression strategy
TCompressionStrategy = (zsDefault, zsFiltered, zsHuffmanOnly, zsRle);
- ZIP and GZIP stream handling via TStreams.
--
Cosmin Truta <cosmint@cs.ubbcluj.ro>

99
zlib/contrib/delphi/zlibd32.mak Normal file
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# Makefile for zlib
# For use with Delphi and C++ Builder under Win32
# Updated for zlib 1.2.x by Cosmin Truta
# ------------ Borland C++ ------------
# This project uses the Delphi (fastcall/register) calling convention:
LOC = -DZEXPORT=__fastcall -DZEXPORTVA=__cdecl
CC = bcc32
LD = bcc32
AR = tlib
# do not use "-pr" in CFLAGS
CFLAGS = -a -d -k- -O2 $(LOC)
LDFLAGS =
# variables
ZLIB_LIB = zlib.lib
OBJ1 = adler32.obj compress.obj crc32.obj deflate.obj gzclose.obj gzlib.obj gzread.obj
OBJ2 = gzwrite.obj infback.obj inffast.obj inflate.obj inftrees.obj trees.obj uncompr.obj zutil.obj
OBJP1 = +adler32.obj+compress.obj+crc32.obj+deflate.obj+gzclose.obj+gzlib.obj+gzread.obj
OBJP2 = +gzwrite.obj+infback.obj+inffast.obj+inflate.obj+inftrees.obj+trees.obj+uncompr.obj+zutil.obj
# targets
all: $(ZLIB_LIB) example.exe minigzip.exe
.c.obj:
$(CC) -c $(CFLAGS) $*.c
adler32.obj: adler32.c zlib.h zconf.h
compress.obj: compress.c zlib.h zconf.h
crc32.obj: crc32.c zlib.h zconf.h crc32.h
deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
gzclose.obj: gzclose.c zlib.h zconf.h gzguts.h
gzlib.obj: gzlib.c zlib.h zconf.h gzguts.h
gzread.obj: gzread.c zlib.h zconf.h gzguts.h
gzwrite.obj: gzwrite.c zlib.h zconf.h gzguts.h
infback.obj: infback.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h inffixed.h
inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h
inflate.obj: inflate.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h inffixed.h
inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
trees.obj: trees.c zutil.h zlib.h zconf.h deflate.h trees.h
uncompr.obj: uncompr.c zlib.h zconf.h
zutil.obj: zutil.c zutil.h zlib.h zconf.h
example.obj: test/example.c zlib.h zconf.h
minigzip.obj: test/minigzip.c zlib.h zconf.h
# For the sake of the old Borland make,
# the command line is cut to fit in the MS-DOS 128 byte limit:
$(ZLIB_LIB): $(OBJ1) $(OBJ2)
-del $(ZLIB_LIB)
$(AR) $(ZLIB_LIB) $(OBJP1)
$(AR) $(ZLIB_LIB) $(OBJP2)
# testing
test: example.exe minigzip.exe
example
echo hello world | minigzip | minigzip -d
example.exe: example.obj $(ZLIB_LIB)
$(LD) $(LDFLAGS) example.obj $(ZLIB_LIB)
minigzip.exe: minigzip.obj $(ZLIB_LIB)
$(LD) $(LDFLAGS) minigzip.obj $(ZLIB_LIB)
# cleanup
clean:
-del *.obj
-del *.exe
-del *.lib
-del *.tds
-del zlib.bak
-del foo.gz

33
zlib/contrib/dotzlib/DotZLib.build Normal file
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<?xml version="1.0" encoding="utf-8" ?>
<project name="DotZLib" default="build" basedir="./DotZLib">
<description>A .Net wrapper library around ZLib1.dll</description>
<property name="nunit.location" value="c:/program files/NUnit V2.1/bin" />
<property name="build.root" value="bin" />
<property name="debug" value="true" />
<property name="nunit" value="true" />
<property name="build.folder" value="${build.root}/debug/" if="${debug}" />
<property name="build.folder" value="${build.root}/release/" unless="${debug}" />
<target name="clean" description="Remove all generated files">
<delete dir="${build.root}" failonerror="false" />
</target>
<target name="build" description="compiles the source code">
<mkdir dir="${build.folder}" />
<csc target="library" output="${build.folder}DotZLib.dll" debug="${debug}">
<references basedir="${nunit.location}">
<includes if="${nunit}" name="nunit.framework.dll" />
</references>
<sources>
<includes name="*.cs" />
<excludes name="UnitTests.cs" unless="${nunit}" />
</sources>
<arg value="/d:nunit" if="${nunit}" />
</csc>
</target>
</project>

BIN
zlib/contrib/dotzlib/DotZLib.chm Normal file
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21
zlib/contrib/dotzlib/DotZLib.sln Normal file
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@ -0,0 +1,21 @@
Microsoft Visual Studio Solution File, Format Version 8.00
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DotZLib", "DotZLib\DotZLib.csproj", "{BB1EE0B1-1808-46CB-B786-949D91117FC5}"
ProjectSection(ProjectDependencies) = postProject
EndProjectSection
EndProject
Global
GlobalSection(SolutionConfiguration) = preSolution
Debug = Debug
Release = Release
EndGlobalSection
GlobalSection(ProjectConfiguration) = postSolution
{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Debug.ActiveCfg = Debug|.NET
{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Debug.Build.0 = Debug|.NET
{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Release.ActiveCfg = Release|.NET
{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Release.Build.0 = Release|.NET
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
EndGlobalSection
GlobalSection(ExtensibilityAddIns) = postSolution
EndGlobalSection
EndGlobal

58
zlib/contrib/dotzlib/DotZLib/AssemblyInfo.cs Normal file
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using System.Reflection;
using System.Runtime.CompilerServices;
//
// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
//
[assembly: AssemblyTitle("DotZLib")]
[assembly: AssemblyDescription(".Net bindings for ZLib compression dll 1.2.x")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("Henrik Ravn")]
[assembly: AssemblyProduct("")]
[assembly: AssemblyCopyright("(c) 2004 by Henrik Ravn")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
//
// Version information for an assembly consists of the following four values:
//
// Major Version
// Minor Version
// Build Number
// Revision
//
// You can specify all the values or you can default the Revision and Build Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.*")]
//
// In order to sign your assembly you must specify a key to use. Refer to the
// Microsoft .NET Framework documentation for more information on assembly signing.
//
// Use the attributes below to control which key is used for signing.
//
// Notes:
// (*) If no key is specified, the assembly is not signed.
// (*) KeyName refers to a key that has been installed in the Crypto Service
// Provider (CSP) on your machine. KeyFile refers to a file which contains
// a key.
// (*) If the KeyFile and the KeyName values are both specified, the
// following processing occurs:
// (1) If the KeyName can be found in the CSP, that key is used.
// (2) If the KeyName does not exist and the KeyFile does exist, the key
// in the KeyFile is installed into the CSP and used.
// (*) In order to create a KeyFile, you can use the sn.exe (Strong Name) utility.
// When specifying the KeyFile, the location of the KeyFile should be
// relative to the project output directory which is
// %Project Directory%\obj\<configuration>. For example, if your KeyFile is
// located in the project directory, you would specify the AssemblyKeyFile
// attribute as [assembly: AssemblyKeyFile("..\\..\\mykey.snk")]
// (*) Delay Signing is an advanced option - see the Microsoft .NET Framework
// documentation for more information on this.
//
[assembly: AssemblyDelaySign(false)]
[assembly: AssemblyKeyFile("")]
[assembly: AssemblyKeyName("")]

202
zlib/contrib/dotzlib/DotZLib/ChecksumImpl.cs Normal file
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//
// © Copyright Henrik Ravn 2004
//
// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
using System;
using System.Runtime.InteropServices;
using System.Text;
namespace DotZLib
{
#region ChecksumGeneratorBase
/// <summary>
/// Implements the common functionality needed for all <see cref="ChecksumGenerator"/>s
/// </summary>
/// <example></example>
public abstract class ChecksumGeneratorBase : ChecksumGenerator
{
/// <summary>
/// The value of the current checksum
/// </summary>
protected uint _current;
/// <summary>
/// Initializes a new instance of the checksum generator base - the current checksum is
/// set to zero
/// </summary>
public ChecksumGeneratorBase()
{
_current = 0;
}
/// <summary>
/// Initializes a new instance of the checksum generator basewith a specified value
/// </summary>
/// <param name="initialValue">The value to set the current checksum to</param>
public ChecksumGeneratorBase(uint initialValue)
{
_current = initialValue;
}
/// <summary>
/// Resets the current checksum to zero
/// </summary>
public void Reset() { _current = 0; }
/// <summary>
/// Gets the current checksum value
/// </summary>
public uint Value { get { return _current; } }
/// <summary>
/// Updates the current checksum with part of an array of bytes
/// </summary>
/// <param name="data">The data to update the checksum with</param>
/// <param name="offset">Where in <c>data</c> to start updating</param>
/// <param name="count">The number of bytes from <c>data</c> to use</param>
/// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
/// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
/// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
/// <remarks>All the other <c>Update</c> methods are implmeneted in terms of this one.
/// This is therefore the only method a derived class has to implement</remarks>
public abstract void Update(byte[] data, int offset, int count);
/// <summary>
/// Updates the current checksum with an array of bytes.
/// </summary>
/// <param name="data">The data to update the checksum with</param>
public void Update(byte[] data)
{
Update(data, 0, data.Length);
}
/// <summary>
/// Updates the current checksum with the data from a string
/// </summary>
/// <param name="data">The string to update the checksum with</param>
/// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks>
public void Update(string data)
{
Update(Encoding.UTF8.GetBytes(data));
}
/// <summary>
/// Updates the current checksum with the data from a string, using a specific encoding
/// </summary>
/// <param name="data">The string to update the checksum with</param>
/// <param name="encoding">The encoding to use</param>
public void Update(string data, Encoding encoding)
{
Update(encoding.GetBytes(data));
}
}
#endregion
#region CRC32
/// <summary>
/// Implements a CRC32 checksum generator
/// </summary>
public sealed class CRC32Checksum : ChecksumGeneratorBase
{
#region DLL imports
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern uint crc32(uint crc, int data, uint length);
#endregion
/// <summary>
/// Initializes a new instance of the CRC32 checksum generator
/// </summary>
public CRC32Checksum() : base() {}
/// <summary>
/// Initializes a new instance of the CRC32 checksum generator with a specified value
/// </summary>
/// <param name="initialValue">The value to set the current checksum to</param>
public CRC32Checksum(uint initialValue) : base(initialValue) {}
/// <summary>
/// Updates the current checksum with part of an array of bytes
/// </summary>
/// <param name="data">The data to update the checksum with</param>
/// <param name="offset">Where in <c>data</c> to start updating</param>
/// <param name="count">The number of bytes from <c>data</c> to use</param>
/// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
/// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
/// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
public override void Update(byte[] data, int offset, int count)
{
if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
if ((offset+count) > data.Length) throw new ArgumentException();
GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
try
{
_current = crc32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count);
}
finally
{
hData.Free();
}
}
}
#endregion
#region Adler
/// <summary>
/// Implements a checksum generator that computes the Adler checksum on data
/// </summary>
public sealed class AdlerChecksum : ChecksumGeneratorBase
{
#region DLL imports
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern uint adler32(uint adler, int data, uint length);
#endregion
/// <summary>
/// Initializes a new instance of the Adler checksum generator
/// </summary>
public AdlerChecksum() : base() {}
/// <summary>
/// Initializes a new instance of the Adler checksum generator with a specified value
/// </summary>
/// <param name="initialValue">The value to set the current checksum to</param>
public AdlerChecksum(uint initialValue) : base(initialValue) {}
/// <summary>
/// Updates the current checksum with part of an array of bytes
/// </summary>
/// <param name="data">The data to update the checksum with</param>
/// <param name="offset">Where in <c>data</c> to start updating</param>
/// <param name="count">The number of bytes from <c>data</c> to use</param>
/// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
/// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
/// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
public override void Update(byte[] data, int offset, int count)
{
if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
if ((offset+count) > data.Length) throw new ArgumentException();
GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
try
{
_current = adler32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count);
}
finally
{
hData.Free();
}
}
}
#endregion
}

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//
// © Copyright Henrik Ravn 2004
//
// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
using System;
using System.Diagnostics;
namespace DotZLib
{
/// <summary>
/// This class implements a circular buffer
/// </summary>
internal class CircularBuffer
{
#region Private data
private int _capacity;
private int _head;
private int _tail;
private int _size;
private byte[] _buffer;
#endregion
public CircularBuffer(int capacity)
{
Debug.Assert( capacity > 0 );
_buffer = new byte[capacity];
_capacity = capacity;
_head = 0;
_tail = 0;
_size = 0;
}
public int Size { get { return _size; } }
public int Put(byte[] source, int offset, int count)
{
Debug.Assert( count > 0 );
int trueCount = Math.Min(count, _capacity - Size);
for (int i = 0; i < trueCount; ++i)
_buffer[(_tail+i) % _capacity] = source[offset+i];
_tail += trueCount;
_tail %= _capacity;
_size += trueCount;
return trueCount;
}
public bool Put(byte b)
{
if (Size == _capacity) // no room
return false;
_buffer[_tail++] = b;
_tail %= _capacity;
++_size;
return true;
}
public int Get(byte[] destination, int offset, int count)
{
int trueCount = Math.Min(count,Size);
for (int i = 0; i < trueCount; ++i)
destination[offset + i] = _buffer[(_head+i) % _capacity];
_head += trueCount;
_head %= _capacity;
_size -= trueCount;
return trueCount;
}
public int Get()
{
if (Size == 0)
return -1;
int result = (int)_buffer[_head++ % _capacity];
--_size;
return result;
}
}
}

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//
// © Copyright Henrik Ravn 2004
//
// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
using System;
using System.Runtime.InteropServices;
namespace DotZLib
{
/// <summary>
/// Implements the common functionality needed for all <see cref="Codec"/>s
/// </summary>
public abstract class CodecBase : Codec, IDisposable
{
#region Data members
/// <summary>
/// Instance of the internal zlib buffer structure that is
/// passed to all functions in the zlib dll
/// </summary>
internal ZStream _ztream = new ZStream();
/// <summary>
/// True if the object instance has been disposed, false otherwise
/// </summary>
protected bool _isDisposed = false;
/// <summary>
/// The size of the internal buffers
/// </summary>
protected const int kBufferSize = 16384;
private byte[] _outBuffer = new byte[kBufferSize];
private byte[] _inBuffer = new byte[kBufferSize];
private GCHandle _hInput;
private GCHandle _hOutput;
private uint _checksum = 0;
#endregion
/// <summary>
/// Initializes a new instance of the <c>CodeBase</c> class.
/// </summary>
public CodecBase()
{
try
{
_hInput = GCHandle.Alloc(_inBuffer, GCHandleType.Pinned);
_hOutput = GCHandle.Alloc(_outBuffer, GCHandleType.Pinned);
}
catch (Exception)
{
CleanUp(false);
throw;
}
}
#region Codec Members
/// <summary>
/// Occurs when more processed data are available.
/// </summary>
public event DataAvailableHandler DataAvailable;
/// <summary>
/// Fires the <see cref="DataAvailable"/> event
/// </summary>
protected void OnDataAvailable()
{
if (_ztream.total_out > 0)
{
if (DataAvailable != null)
DataAvailable( _outBuffer, 0, (int)_ztream.total_out);
resetOutput();
}
}
/// <summary>
/// Adds more data to the codec to be processed.
/// </summary>
/// <param name="data">Byte array containing the data to be added to the codec</param>
/// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
public void Add(byte[] data)
{
Add(data,0,data.Length);
}
/// <summary>
/// Adds more data to the codec to be processed.
/// </summary>
/// <param name="data">Byte array containing the data to be added to the codec</param>
/// <param name="offset">The index of the first byte to add from <c>data</c></param>
/// <param name="count">The number of bytes to add</param>
/// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
/// <remarks>This must be implemented by a derived class</remarks>
public abstract void Add(byte[] data, int offset, int count);
/// <summary>
/// Finishes up any pending data that needs to be processed and handled.
/// </summary>
/// <remarks>This must be implemented by a derived class</remarks>
public abstract void Finish();
/// <summary>
/// Gets the checksum of the data that has been added so far
/// </summary>
public uint Checksum { get { return _checksum; } }
#endregion
#region Destructor & IDisposable stuff
/// <summary>
/// Destroys this instance
/// </summary>
~CodecBase()
{
CleanUp(false);
}
/// <summary>
/// Releases any unmanaged resources and calls the <see cref="CleanUp()"/> method of the derived class
/// </summary>
public void Dispose()
{
CleanUp(true);
}
/// <summary>
/// Performs any codec specific cleanup
/// </summary>
/// <remarks>This must be implemented by a derived class</remarks>
protected abstract void CleanUp();
// performs the release of the handles and calls the dereived CleanUp()
private void CleanUp(bool isDisposing)
{
if (!_isDisposed)
{
CleanUp();
if (_hInput.IsAllocated)
_hInput.Free();
if (_hOutput.IsAllocated)
_hOutput.Free();
_isDisposed = true;
}
}
#endregion
#region Helper methods
/// <summary>
/// Copies a number of bytes to the internal codec buffer - ready for proccesing
/// </summary>
/// <param name="data">The byte array that contains the data to copy</param>
/// <param name="startIndex">The index of the first byte to copy</param>
/// <param name="count">The number of bytes to copy from <c>data</c></param>
protected void copyInput(byte[] data, int startIndex, int count)
{
Array.Copy(data, startIndex, _inBuffer,0, count);
_ztream.next_in = _hInput.AddrOfPinnedObject();
_ztream.total_in = 0;
_ztream.avail_in = (uint)count;
}
/// <summary>
/// Resets the internal output buffers to a known state - ready for processing
/// </summary>
protected void resetOutput()
{
_ztream.total_out = 0;
_ztream.avail_out = kBufferSize;
_ztream.next_out = _hOutput.AddrOfPinnedObject();
}
/// <summary>
/// Updates the running checksum property
/// </summary>
/// <param name="newSum">The new checksum value</param>
protected void setChecksum(uint newSum)
{
_checksum = newSum;
}
#endregion
}
}

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//
// © Copyright Henrik Ravn 2004
//
// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace DotZLib
{
/// <summary>
/// Implements a data compressor, using the deflate algorithm in the ZLib dll
/// </summary>
public sealed class Deflater : CodecBase
{
#region Dll imports
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
private static extern int deflateInit_(ref ZStream sz, int level, string vs, int size);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int deflate(ref ZStream sz, int flush);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int deflateReset(ref ZStream sz);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int deflateEnd(ref ZStream sz);
#endregion
/// <summary>
/// Constructs an new instance of the <c>Deflater</c>
/// </summary>
/// <param name="level">The compression level to use for this <c>Deflater</c></param>
public Deflater(CompressLevel level) : base()
{
int retval = deflateInit_(ref _ztream, (int)level, Info.Version, Marshal.SizeOf(_ztream));
if (retval != 0)
throw new ZLibException(retval, "Could not initialize deflater");
resetOutput();
}
/// <summary>
/// Adds more data to the codec to be processed.
/// </summary>
/// <param name="data">Byte array containing the data to be added to the codec</param>
/// <param name="offset">The index of the first byte to add from <c>data</c></param>
/// <param name="count">The number of bytes to add</param>
/// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
public override void Add(byte[] data, int offset, int count)
{
if (data == null) throw new ArgumentNullException();
if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
if ((offset+count) > data.Length) throw new ArgumentException();
int total = count;
int inputIndex = offset;
int err = 0;
while (err >= 0 && inputIndex < total)
{
copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
while (err >= 0 && _ztream.avail_in > 0)
{
err = deflate(ref _ztream, (int)FlushTypes.None);
if (err == 0)
while (_ztream.avail_out == 0)
{
OnDataAvailable();
err = deflate(ref _ztream, (int)FlushTypes.None);
}
inputIndex += (int)_ztream.total_in;
}
}
setChecksum( _ztream.adler );
}
/// <summary>
/// Finishes up any pending data that needs to be processed and handled.
/// </summary>
public override void Finish()
{
int err;
do
{
err = deflate(ref _ztream, (int)FlushTypes.Finish);
OnDataAvailable();
}
while (err == 0);
setChecksum( _ztream.adler );
deflateReset(ref _ztream);
resetOutput();
}
/// <summary>
/// Closes the internal zlib deflate stream
/// </summary>
protected override void CleanUp() { deflateEnd(ref _ztream); }
}
}

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//
// © Copyright Henrik Ravn 2004
//
// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
namespace DotZLib
{
#region Internal types
/// <summary>
/// Defines constants for the various flush types used with zlib
/// </summary>
internal enum FlushTypes
{
None, Partial, Sync, Full, Finish, Block
}
#region ZStream structure
// internal mapping of the zlib zstream structure for marshalling
[StructLayoutAttribute(LayoutKind.Sequential, Pack=4, Size=0, CharSet=CharSet.Ansi)]
internal struct ZStream
{
public IntPtr next_in;
public uint avail_in;
public uint total_in;
public IntPtr next_out;
public uint avail_out;
public uint total_out;
[MarshalAs(UnmanagedType.LPStr)]
string msg;
uint state;
uint zalloc;
uint zfree;
uint opaque;
int data_type;
public uint adler;
uint reserved;
}
#endregion
#endregion
#region Public enums
/// <summary>
/// Defines constants for the available compression levels in zlib
/// </summary>
public enum CompressLevel : int
{
/// <summary>
/// The default compression level with a reasonable compromise between compression and speed
/// </summary>
Default = -1,
/// <summary>
/// No compression at all. The data are passed straight through.
/// </summary>
None = 0,
/// <summary>
/// The maximum compression rate available.
/// </summary>
Best = 9,
/// <summary>
/// The fastest available compression level.
/// </summary>
Fastest = 1
}
#endregion
#region Exception classes
/// <summary>
/// The exception that is thrown when an error occurs on the zlib dll
/// </summary>
public class ZLibException : ApplicationException
{
/// <summary>
/// Initializes a new instance of the <see cref="ZLibException"/> class with a specified
/// error message and error code
/// </summary>
/// <param name="errorCode">The zlib error code that caused the exception</param>
/// <param name="msg">A message that (hopefully) describes the error</param>
public ZLibException(int errorCode, string msg) : base(String.Format("ZLib error {0} {1}", errorCode, msg))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="ZLibException"/> class with a specified
/// error code
/// </summary>
/// <param name="errorCode">The zlib error code that caused the exception</param>
public ZLibException(int errorCode) : base(String.Format("ZLib error {0}", errorCode))
{
}
}
#endregion
#region Interfaces
/// <summary>
/// Declares methods and properties that enables a running checksum to be calculated
/// </summary>
public interface ChecksumGenerator
{
/// <summary>
/// Gets the current value of the checksum
/// </summary>
uint Value { get; }
/// <summary>
/// Clears the current checksum to 0
/// </summary>
void Reset();
/// <summary>
/// Updates the current checksum with an array of bytes
/// </summary>
/// <param name="data">The data to update the checksum with</param>
void Update(byte[] data);
/// <summary>
/// Updates the current checksum with part of an array of bytes
/// </summary>
/// <param name="data">The data to update the checksum with</param>
/// <param name="offset">Where in <c>data</c> to start updating</param>
/// <param name="count">The number of bytes from <c>data</c> to use</param>
/// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
/// <exception cref="ArgumentNullException"><c>data</c> is a null reference</exception>
/// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
void Update(byte[] data, int offset, int count);
/// <summary>
/// Updates the current checksum with the data from a string
/// </summary>
/// <param name="data">The string to update the checksum with</param>
/// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks>
void Update(string data);
/// <summary>
/// Updates the current checksum with the data from a string, using a specific encoding
/// </summary>
/// <param name="data">The string to update the checksum with</param>
/// <param name="encoding">The encoding to use</param>
void Update(string data, Encoding encoding);
}
/// <summary>
/// Represents the method that will be called from a codec when new data
/// are available.
/// </summary>
/// <paramref name="data">The byte array containing the processed data</paramref>
/// <paramref name="startIndex">The index of the first processed byte in <c>data</c></paramref>
/// <paramref name="count">The number of processed bytes available</paramref>
/// <remarks>On return from this method, the data may be overwritten, so grab it while you can.
/// You cannot assume that startIndex will be zero.
/// </remarks>
public delegate void DataAvailableHandler(byte[] data, int startIndex, int count);
/// <summary>
/// Declares methods and events for implementing compressors/decompressors
/// </summary>
public interface Codec
{
/// <summary>
/// Occurs when more processed data are available.
/// </summary>
event DataAvailableHandler DataAvailable;
/// <summary>
/// Adds more data to the codec to be processed.
/// </summary>
/// <param name="data">Byte array containing the data to be added to the codec</param>
/// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
void Add(byte[] data);
/// <summary>
/// Adds more data to the codec to be processed.
/// </summary>
/// <param name="data">Byte array containing the data to be added to the codec</param>
/// <param name="offset">The index of the first byte to add from <c>data</c></param>
/// <param name="count">The number of bytes to add</param>
/// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
void Add(byte[] data, int offset, int count);
/// <summary>
/// Finishes up any pending data that needs to be processed and handled.
/// </summary>
void Finish();
/// <summary>
/// Gets the checksum of the data that has been added so far
/// </summary>
uint Checksum { get; }
}
#endregion
#region Classes
/// <summary>
/// Encapsulates general information about the ZLib library
/// </summary>
public class Info
{
#region DLL imports
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern uint zlibCompileFlags();
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern string zlibVersion();
#endregion
#region Private stuff
private uint _flags;
// helper function that unpacks a bitsize mask
private static int bitSize(uint bits)
{
switch (bits)
{
case 0: return 16;
case 1: return 32;
case 2: return 64;
}
return -1;
}
#endregion
/// <summary>
/// Constructs an instance of the <c>Info</c> class.
/// </summary>
public Info()
{
_flags = zlibCompileFlags();
}
/// <summary>
/// True if the library is compiled with debug info
/// </summary>
public bool HasDebugInfo { get { return 0 != (_flags & 0x100); } }
/// <summary>
/// True if the library is compiled with assembly optimizations
/// </summary>
public bool UsesAssemblyCode { get { return 0 != (_flags & 0x200); } }
/// <summary>
/// Gets the size of the unsigned int that was compiled into Zlib
/// </summary>
public int SizeOfUInt { get { return bitSize(_flags & 3); } }
/// <summary>
/// Gets the size of the unsigned long that was compiled into Zlib
/// </summary>
public int SizeOfULong { get { return bitSize((_flags >> 2) & 3); } }
/// <summary>
/// Gets the size of the pointers that were compiled into Zlib
/// </summary>
public int SizeOfPointer { get { return bitSize((_flags >> 4) & 3); } }
/// <summary>
/// Gets the size of the z_off_t type that was compiled into Zlib
/// </summary>
public int SizeOfOffset { get { return bitSize((_flags >> 6) & 3); } }
/// <summary>
/// Gets the version of ZLib as a string, e.g. "1.2.1"
/// </summary>
public static string Version { get { return zlibVersion(); } }
}
#endregion
}

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<CSHARP
ProjectType = "Local"
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SchemaVersion = "2.0"
ProjectGuid = "{BB1EE0B1-1808-46CB-B786-949D91117FC5}"
>
<Build>
<Settings
ApplicationIcon = ""
AssemblyKeyContainerName = ""
AssemblyName = "DotZLib"
AssemblyOriginatorKeyFile = ""
DefaultClientScript = "JScript"
DefaultHTMLPageLayout = "Grid"
DefaultTargetSchema = "IE50"
DelaySign = "false"
OutputType = "Library"
PreBuildEvent = ""
PostBuildEvent = ""
RootNamespace = "DotZLib"
RunPostBuildEvent = "OnBuildSuccess"
StartupObject = ""
>
<Config
Name = "Debug"
AllowUnsafeBlocks = "false"
BaseAddress = "285212672"
CheckForOverflowUnderflow = "false"
ConfigurationOverrideFile = ""
DefineConstants = "DEBUG;TRACE"
DocumentationFile = "docs\DotZLib.xml"
DebugSymbols = "true"
FileAlignment = "4096"
IncrementalBuild = "false"
NoStdLib = "false"
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Optimize = "false"
OutputPath = "bin\Debug\"
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RemoveIntegerChecks = "false"
TreatWarningsAsErrors = "false"
WarningLevel = "4"
/>
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AllowUnsafeBlocks = "false"
BaseAddress = "285212672"
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ConfigurationOverrideFile = ""
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DocumentationFile = "docs\DotZLib.xml"
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FileAlignment = "4096"
IncrementalBuild = "false"
NoStdLib = "false"
NoWarn = ""
Optimize = "true"
OutputPath = "bin\Release\"
RegisterForComInterop = "false"
RemoveIntegerChecks = "false"
TreatWarningsAsErrors = "false"
WarningLevel = "4"
/>
</Settings>
<References>
<Reference
Name = "System"
AssemblyName = "System"
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<Files>
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//
// © Copyright Henrik Ravn 2004
//
// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
using System;
using System.IO;
using System.Runtime.InteropServices;
namespace DotZLib
{
/// <summary>
/// Implements a compressed <see cref="Stream"/>, in GZip (.gz) format.
/// </summary>
public class GZipStream : Stream, IDisposable
{
#region Dll Imports
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
private static extern IntPtr gzopen(string name, string mode);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int gzclose(IntPtr gzFile);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int gzwrite(IntPtr gzFile, int data, int length);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int gzread(IntPtr gzFile, int data, int length);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int gzgetc(IntPtr gzFile);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int gzputc(IntPtr gzFile, int c);
#endregion
#region Private data
private IntPtr _gzFile;
private bool _isDisposed = false;
private bool _isWriting;
#endregion
#region Constructors
/// <summary>
/// Creates a new file as a writeable GZipStream
/// </summary>
/// <param name="fileName">The name of the compressed file to create</param>
/// <param name="level">The compression level to use when adding data</param>
/// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
public GZipStream(string fileName, CompressLevel level)
{
_isWriting = true;
_gzFile = gzopen(fileName, String.Format("wb{0}", (int)level));
if (_gzFile == IntPtr.Zero)
throw new ZLibException(-1, "Could not open " + fileName);
}
/// <summary>
/// Opens an existing file as a readable GZipStream
/// </summary>
/// <param name="fileName">The name of the file to open</param>
/// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
public GZipStream(string fileName)
{
_isWriting = false;
_gzFile = gzopen(fileName, "rb");
if (_gzFile == IntPtr.Zero)
throw new ZLibException(-1, "Could not open " + fileName);
}
#endregion
#region Access properties
/// <summary>
/// Returns true of this stream can be read from, false otherwise
/// </summary>
public override bool CanRead
{
get
{
return !_isWriting;
}
}
/// <summary>
/// Returns false.
/// </summary>
public override bool CanSeek
{
get
{
return false;
}
}
/// <summary>
/// Returns true if this tsream is writeable, false otherwise
/// </summary>
public override bool CanWrite
{
get
{
return _isWriting;
}
}
#endregion
#region Destructor & IDispose stuff
/// <summary>
/// Destroys this instance
/// </summary>
~GZipStream()
{
cleanUp(false);
}
/// <summary>
/// Closes the external file handle
/// </summary>
public void Dispose()
{
cleanUp(true);
}
// Does the actual closing of the file handle.
private void cleanUp(bool isDisposing)
{
if (!_isDisposed)
{
gzclose(_gzFile);
_isDisposed = true;
}
}
#endregion
#region Basic reading and writing
/// <summary>
/// Attempts to read a number of bytes from the stream.
/// </summary>
/// <param name="buffer">The destination data buffer</param>
/// <param name="offset">The index of the first destination byte in <c>buffer</c></param>
/// <param name="count">The number of bytes requested</param>
/// <returns>The number of bytes read</returns>
/// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
/// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
/// <exception cref="ArgumentException">If <c>offset</c> + <c>count</c> is &gt; buffer.Length</exception>
/// <exception cref="NotSupportedException">If this stream is not readable.</exception>
/// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
public override int Read(byte[] buffer, int offset, int count)
{
if (!CanRead) throw new NotSupportedException();
if (buffer == null) throw new ArgumentNullException();
if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
if ((offset+count) > buffer.Length) throw new ArgumentException();
if (_isDisposed) throw new ObjectDisposedException("GZipStream");
GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned);
int result;
try
{
result = gzread(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count);
if (result < 0)
throw new IOException();
}
finally
{
h.Free();
}
return result;
}
/// <summary>
/// Attempts to read a single byte from the stream.
/// </summary>
/// <returns>The byte that was read, or -1 in case of error or End-Of-File</returns>
public override int ReadByte()
{
if (!CanRead) throw new NotSupportedException();
if (_isDisposed) throw new ObjectDisposedException("GZipStream");
return gzgetc(_gzFile);
}
/// <summary>
/// Writes a number of bytes to the stream
/// </summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
/// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
/// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
/// <exception cref="ArgumentException">If <c>offset</c> + <c>count</c> is &gt; buffer.Length</exception>
/// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
/// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
public override void Write(byte[] buffer, int offset, int count)
{
if (!CanWrite) throw new NotSupportedException();
if (buffer == null) throw new ArgumentNullException();
if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
if ((offset+count) > buffer.Length) throw new ArgumentException();
if (_isDisposed) throw new ObjectDisposedException("GZipStream");
GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned);
try
{
int result = gzwrite(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count);
if (result < 0)
throw new IOException();
}
finally
{
h.Free();
}
}
/// <summary>
/// Writes a single byte to the stream
/// </summary>
/// <param name="value">The byte to add to the stream.</param>
/// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
/// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
public override void WriteByte(byte value)
{
if (!CanWrite) throw new NotSupportedException();
if (_isDisposed) throw new ObjectDisposedException("GZipStream");
int result = gzputc(_gzFile, (int)value);
if (result < 0)
throw new IOException();
}
#endregion
#region Position & length stuff
/// <summary>
/// Not supported.
/// </summary>
/// <param name="value"></param>
/// <exception cref="NotSupportedException">Always thrown</exception>
public override void SetLength(long value)
{
throw new NotSupportedException();
}
/// <summary>
/// Not suppported.
/// </summary>
/// <param name="offset"></param>
/// <param name="origin"></param>
/// <returns></returns>
/// <exception cref="NotSupportedException">Always thrown</exception>
public override long Seek(long offset, SeekOrigin origin)
{
throw new NotSupportedException();
}
/// <summary>
/// Flushes the <c>GZipStream</c>.
/// </summary>
/// <remarks>In this implementation, this method does nothing. This is because excessive
/// flushing may degrade the achievable compression rates.</remarks>
public override void Flush()
{
// left empty on purpose
}
/// <summary>
/// Gets/sets the current position in the <c>GZipStream</c>. Not suppported.
/// </summary>
/// <remarks>In this implementation this property is not supported</remarks>
/// <exception cref="NotSupportedException">Always thrown</exception>
public override long Position
{
get
{
throw new NotSupportedException();
}
set
{
throw new NotSupportedException();
}
}
/// <summary>
/// Gets the size of the stream. Not suppported.
/// </summary>
/// <remarks>In this implementation this property is not supported</remarks>
/// <exception cref="NotSupportedException">Always thrown</exception>
public override long Length
{
get
{
throw new NotSupportedException();
}
}
#endregion
}
}

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//
// © Copyright Henrik Ravn 2004
//
// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace DotZLib
{
/// <summary>
/// Implements a data decompressor, using the inflate algorithm in the ZLib dll
/// </summary>
public class Inflater : CodecBase
{
#region Dll imports
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
private static extern int inflateInit_(ref ZStream sz, string vs, int size);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int inflate(ref ZStream sz, int flush);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int inflateReset(ref ZStream sz);
[DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
private static extern int inflateEnd(ref ZStream sz);
#endregion
/// <summary>
/// Constructs an new instance of the <c>Inflater</c>
/// </summary>
public Inflater() : base()
{
int retval = inflateInit_(ref _ztream, Info.Version, Marshal.SizeOf(_ztream));
if (retval != 0)
throw new ZLibException(retval, "Could not initialize inflater");
resetOutput();
}
/// <summary>
/// Adds more data to the codec to be processed.
/// </summary>
/// <param name="data">Byte array containing the data to be added to the codec</param>
/// <param name="offset">The index of the first byte to add from <c>data</c></param>
/// <param name="count">The number of bytes to add</param>
/// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
public override void Add(byte[] data, int offset, int count)
{
if (data == null) throw new ArgumentNullException();
if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
if ((offset+count) > data.Length) throw new ArgumentException();
int total = count;
int inputIndex = offset;
int err = 0;
while (err >= 0 && inputIndex < total)
{
copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
err = inflate(ref _ztream, (int)FlushTypes.None);
if (err == 0)
while (_ztream.avail_out == 0)
{
OnDataAvailable();
err = inflate(ref _ztream, (int)FlushTypes.None);
}
inputIndex += (int)_ztream.total_in;
}
setChecksum( _ztream.adler );
}
/// <summary>
/// Finishes up any pending data that needs to be processed and handled.
/// </summary>
public override void Finish()
{
int err;
do
{
err = inflate(ref _ztream, (int)FlushTypes.Finish);
OnDataAvailable();
}
while (err == 0);
setChecksum( _ztream.adler );
inflateReset(ref _ztream);
resetOutput();
}
/// <summary>
/// Closes the internal zlib inflate stream
/// </summary>
protected override void CleanUp() { inflateEnd(ref _ztream); }
}
}

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//
// © Copyright Henrik Ravn 2004
//
// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
using System;
using System.Collections;
using System.IO;
// uncomment the define below to include unit tests
//#define nunit
#if nunit
using NUnit.Framework;
// Unit tests for the DotZLib class library
// ----------------------------------------
//
// Use this with NUnit 2 from http://www.nunit.org
//
namespace DotZLibTests
{
using DotZLib;
// helper methods
internal class Utils
{
public static bool byteArrEqual( byte[] lhs, byte[] rhs )
{
if (lhs.Length != rhs.Length)
return false;
for (int i = lhs.Length-1; i >= 0; --i)
if (lhs[i] != rhs[i])
return false;
return true;
}
}
[TestFixture]
public class CircBufferTests
{
#region Circular buffer tests
[Test]
public void SinglePutGet()
{
CircularBuffer buf = new CircularBuffer(10);
Assert.AreEqual( 0, buf.Size );
Assert.AreEqual( -1, buf.Get() );
Assert.IsTrue(buf.Put( 1 ));
Assert.AreEqual( 1, buf.Size );
Assert.AreEqual( 1, buf.Get() );
Assert.AreEqual( 0, buf.Size );
Assert.AreEqual( -1, buf.Get() );
}
[Test]
public void BlockPutGet()
{
CircularBuffer buf = new CircularBuffer(10);
byte[] arr = {1,2,3,4,5,6,7,8,9,10};
Assert.AreEqual( 10, buf.Put(arr,0,10) );
Assert.AreEqual( 10, buf.Size );
Assert.IsFalse( buf.Put(11) );
Assert.AreEqual( 1, buf.Get() );
Assert.IsTrue( buf.Put(11) );
byte[] arr2 = (byte[])arr.Clone();
Assert.AreEqual( 9, buf.Get(arr2,1,9) );
Assert.IsTrue( Utils.byteArrEqual(arr,arr2) );
}
#endregion
}
[TestFixture]
public class ChecksumTests
{
#region CRC32 Tests
[Test]
public void CRC32_Null()
{
CRC32Checksum crc32 = new CRC32Checksum();
Assert.AreEqual( 0, crc32.Value );
crc32 = new CRC32Checksum(1);
Assert.AreEqual( 1, crc32.Value );
crc32 = new CRC32Checksum(556);
Assert.AreEqual( 556, crc32.Value );
}
[Test]
public void CRC32_Data()
{
CRC32Checksum crc32 = new CRC32Checksum();
byte[] data = { 1,2,3,4,5,6,7 };
crc32.Update(data);
Assert.AreEqual( 0x70e46888, crc32.Value );
crc32 = new CRC32Checksum();
crc32.Update("penguin");
Assert.AreEqual( 0x0e5c1a120, crc32.Value );
crc32 = new CRC32Checksum(1);
crc32.Update("penguin");
Assert.AreEqual(0x43b6aa94, crc32.Value);
}
#endregion
#region Adler tests
[Test]
public void Adler_Null()
{
AdlerChecksum adler = new AdlerChecksum();
Assert.AreEqual(0, adler.Value);
adler = new AdlerChecksum(1);
Assert.AreEqual( 1, adler.Value );
adler = new AdlerChecksum(556);
Assert.AreEqual( 556, adler.Value );
}
[Test]
public void Adler_Data()
{
AdlerChecksum adler = new AdlerChecksum(1);
byte[] data = { 1,2,3,4,5,6,7 };
adler.Update(data);
Assert.AreEqual( 0x5b001d, adler.Value );
adler = new AdlerChecksum();
adler.Update("penguin");
Assert.AreEqual(0x0bcf02f6, adler.Value );
adler = new AdlerChecksum(1);
adler.Update("penguin");
Assert.AreEqual(0x0bd602f7, adler.Value);
}
#endregion
}
[TestFixture]
public class InfoTests
{
#region Info tests
[Test]
public void Info_Version()
{
Info info = new Info();
Assert.AreEqual("1.2.7", Info.Version);
Assert.AreEqual(32, info.SizeOfUInt);
Assert.AreEqual(32, info.SizeOfULong);
Assert.AreEqual(32, info.SizeOfPointer);
Assert.AreEqual(32, info.SizeOfOffset);
}
#endregion
}
[TestFixture]
public class DeflateInflateTests
{
#region Deflate tests
[Test]
public void Deflate_Init()
{
using (Deflater def = new Deflater(CompressLevel.Default))
{
}
}
private ArrayList compressedData = new ArrayList();
private uint adler1;
private ArrayList uncompressedData = new ArrayList();
private uint adler2;
public void CDataAvail(byte[] data, int startIndex, int count)
{
for (int i = 0; i < count; ++i)
compressedData.Add(data[i+startIndex]);
}
[Test]
public void Deflate_Compress()
{
compressedData.Clear();
byte[] testData = new byte[35000];
for (int i = 0; i < testData.Length; ++i)
testData[i] = 5;
using (Deflater def = new Deflater((CompressLevel)5))
{
def.DataAvailable += new DataAvailableHandler(CDataAvail);
def.Add(testData);
def.Finish();
adler1 = def.Checksum;
}
}
#endregion
#region Inflate tests
[Test]
public void Inflate_Init()
{
using (Inflater inf = new Inflater())
{
}
}
private void DDataAvail(byte[] data, int startIndex, int count)
{
for (int i = 0; i < count; ++i)
uncompressedData.Add(data[i+startIndex]);
}
[Test]
public void Inflate_Expand()
{
uncompressedData.Clear();
using (Inflater inf = new Inflater())
{
inf.DataAvailable += new DataAvailableHandler(DDataAvail);
inf.Add((byte[])compressedData.ToArray(typeof(byte)));
inf.Finish();
adler2 = inf.Checksum;
}
Assert.AreEqual( adler1, adler2 );
}
#endregion
}
[TestFixture]
public class GZipStreamTests
{
#region GZipStream test
[Test]
public void GZipStream_WriteRead()
{
using (GZipStream gzOut = new GZipStream("gzstream.gz", CompressLevel.Best))
{
BinaryWriter writer = new BinaryWriter(gzOut);
writer.Write("hi there");
writer.Write(Math.PI);
writer.Write(42);
}
using (GZipStream gzIn = new GZipStream("gzstream.gz"))
{
BinaryReader reader = new BinaryReader(gzIn);
string s = reader.ReadString();
Assert.AreEqual("hi there",s);
double d = reader.ReadDouble();
Assert.AreEqual(Math.PI, d);
int i = reader.ReadInt32();
Assert.AreEqual(42,i);
}
}
#endregion
}
}
#endif

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zlib/contrib/dotzlib/LICENSE_1_0.txt Normal file
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Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

58
zlib/contrib/dotzlib/readme.txt Normal file
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This directory contains a .Net wrapper class library for the ZLib1.dll
The wrapper includes support for inflating/deflating memory buffers,
.Net streaming wrappers for the gz streams part of zlib, and wrappers
for the checksum parts of zlib. See DotZLib/UnitTests.cs for examples.
Directory structure:
--------------------
LICENSE_1_0.txt - License file.
readme.txt - This file.
DotZLib.chm - Class library documentation
DotZLib.build - NAnt build file
DotZLib.sln - Microsoft Visual Studio 2003 solution file
DotZLib\*.cs - Source files for the class library
Unit tests:
-----------
The file DotZLib/UnitTests.cs contains unit tests for use with NUnit 2.1 or higher.
To include unit tests in the build, define nunit before building.
Build instructions:
-------------------
1. Using Visual Studio.Net 2003:
Open DotZLib.sln in VS.Net and build from there. Output file (DotZLib.dll)
will be found ./DotZLib/bin/release or ./DotZLib/bin/debug, depending on
you are building the release or debug version of the library. Check
DotZLib/UnitTests.cs for instructions on how to include unit tests in the
build.
2. Using NAnt:
Open a command prompt with access to the build environment and run nant
in the same directory as the DotZLib.build file.
You can define 2 properties on the nant command-line to control the build:
debug={true|false} to toggle between release/debug builds (default=true).
nunit={true|false} to include or esclude unit tests (default=true).
Also the target clean will remove binaries.
Output file (DotZLib.dll) will be found in either ./DotZLib/bin/release
or ./DotZLib/bin/debug, depending on whether you are building the release
or debug version of the library.
Examples:
nant -D:debug=false -D:nunit=false
will build a release mode version of the library without unit tests.
nant
will build a debug version of the library with unit tests
nant clean
will remove all previously built files.
---------------------------------
Copyright (c) Henrik Ravn 2004
Use, modification and distribution are subject to the Boost Software License, Version 1.0.
(See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

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zlib/contrib/gcc_gvmat64/gvmat64.S Normal file
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/*
;uInt longest_match_x64(
; deflate_state *s,
; IPos cur_match); // current match
; gvmat64.S -- Asm portion of the optimized longest_match for 32 bits x86_64
; (AMD64 on Athlon 64, Opteron, Phenom
; and Intel EM64T on Pentium 4 with EM64T, Pentium D, Core 2 Duo, Core I5/I7)
; this file is translation from gvmat64.asm to GCC 4.x (for Linux, Mac XCode)
; Copyright (C) 1995-2010 Jean-loup Gailly, Brian Raiter and Gilles Vollant.
;
; File written by Gilles Vollant, by converting to assembly the longest_match
; from Jean-loup Gailly in deflate.c of zLib and infoZip zip.
; and by taking inspiration on asm686 with masm, optimised assembly code
; from Brian Raiter, written 1998
;
; This software is provided 'as-is', without any express or implied
; warranty. In no event will the authors be held liable for any damages
; arising from the use of this software.
;
; Permission is granted to anyone to use this software for any purpose,
; including commercial applications, and to alter it and redistribute it
; freely, subject to the following restrictions:
;
; 1. The origin of this software must not be misrepresented; you must not
; claim that you wrote the original software. If you use this software
; in a product, an acknowledgment in the product documentation would be
; appreciated but is not required.
; 2. Altered source versions must be plainly marked as such, and must not be
; misrepresented as being the original software
; 3. This notice may not be removed or altered from any source distribution.
;
; http://www.zlib.net
; http://www.winimage.com/zLibDll
; http://www.muppetlabs.com/~breadbox/software/assembly.html
;
; to compile this file for zLib, I use option:
; gcc -c -arch x86_64 gvmat64.S
;uInt longest_match(s, cur_match)
; deflate_state *s;
; IPos cur_match; // current match /
;
; with XCode for Mac, I had strange error with some jump on intel syntax
; this is why BEFORE_JMP and AFTER_JMP are used
*/
#define BEFORE_JMP .att_syntax
#define AFTER_JMP .intel_syntax noprefix
#ifndef NO_UNDERLINE
# define match_init _match_init
# define longest_match _longest_match
#endif
.intel_syntax noprefix
.globl match_init, longest_match
.text
longest_match:
#define LocalVarsSize 96
/*
; register used : rax,rbx,rcx,rdx,rsi,rdi,r8,r9,r10,r11,r12
; free register : r14,r15
; register can be saved : rsp
*/
#define chainlenwmask (rsp + 8 - LocalVarsSize)
#define nicematch (rsp + 16 - LocalVarsSize)
#define save_rdi (rsp + 24 - LocalVarsSize)
#define save_rsi (rsp + 32 - LocalVarsSize)
#define save_rbx (rsp + 40 - LocalVarsSize)
#define save_rbp (rsp + 48 - LocalVarsSize)
#define save_r12 (rsp + 56 - LocalVarsSize)
#define save_r13 (rsp + 64 - LocalVarsSize)
#define save_r14 (rsp + 72 - LocalVarsSize)
#define save_r15 (rsp + 80 - LocalVarsSize)
/*
; all the +4 offsets are due to the addition of pending_buf_size (in zlib
; in the deflate_state structure since the asm code was first written
; (if you compile with zlib 1.0.4 or older, remove the +4).
; Note : these value are good with a 8 bytes boundary pack structure
*/
#define MAX_MATCH 258
#define MIN_MATCH 3
#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
/*
;;; Offsets for fields in the deflate_state structure. These numbers
;;; are calculated from the definition of deflate_state, with the
;;; assumption that the compiler will dword-align the fields. (Thus,
;;; changing the definition of deflate_state could easily cause this
;;; program to crash horribly, without so much as a warning at
;;; compile time. Sigh.)
; all the +zlib1222add offsets are due to the addition of fields
; in zlib in the deflate_state structure since the asm code was first written
; (if you compile with zlib 1.0.4 or older, use "zlib1222add equ (-4)").
; (if you compile with zlib between 1.0.5 and 1.2.2.1, use "zlib1222add equ 0").
; if you compile with zlib 1.2.2.2 or later , use "zlib1222add equ 8").
*/
/* you can check the structure offset by running
#include <stdlib.h>
#include <stdio.h>
#include "deflate.h"
void print_depl()
{
deflate_state ds;
deflate_state *s=&ds;
printf("size pointer=%u\n",(int)sizeof(void*));
printf("#define dsWSize %u\n",(int)(((char*)&(s->w_size))-((char*)s)));
printf("#define dsWMask %u\n",(int)(((char*)&(s->w_mask))-((char*)s)));
printf("#define dsWindow %u\n",(int)(((char*)&(s->window))-((char*)s)));
printf("#define dsPrev %u\n",(int)(((char*)&(s->prev))-((char*)s)));
printf("#define dsMatchLen %u\n",(int)(((char*)&(s->match_length))-((char*)s)));
printf("#define dsPrevMatch %u\n",(int)(((char*)&(s->prev_match))-((char*)s)));
printf("#define dsStrStart %u\n",(int)(((char*)&(s->strstart))-((char*)s)));
printf("#define dsMatchStart %u\n",(int)(((char*)&(s->match_start))-((char*)s)));
printf("#define dsLookahead %u\n",(int)(((char*)&(s->lookahead))-((char*)s)));
printf("#define dsPrevLen %u\n",(int)(((char*)&(s->prev_length))-((char*)s)));
printf("#define dsMaxChainLen %u\n",(int)(((char*)&(s->max_chain_length))-((char*)s)));
printf("#define dsGoodMatch %u\n",(int)(((char*)&(s->good_match))-((char*)s)));
printf("#define dsNiceMatch %u\n",(int)(((char*)&(s->nice_match))-((char*)s)));
}
*/
#define dsWSize 68
#define dsWMask 76
#define dsWindow 80
#define dsPrev 96
#define dsMatchLen 144
#define dsPrevMatch 148
#define dsStrStart 156
#define dsMatchStart 160
#define dsLookahead 164
#define dsPrevLen 168
#define dsMaxChainLen 172
#define dsGoodMatch 188
#define dsNiceMatch 192
#define window_size [ rcx + dsWSize]
#define WMask [ rcx + dsWMask]
#define window_ad [ rcx + dsWindow]
#define prev_ad [ rcx + dsPrev]
#define strstart [ rcx + dsStrStart]
#define match_start [ rcx + dsMatchStart]
#define Lookahead [ rcx + dsLookahead] //; 0ffffffffh on infozip
#define prev_length [ rcx + dsPrevLen]
#define max_chain_length [ rcx + dsMaxChainLen]
#define good_match [ rcx + dsGoodMatch]
#define nice_match [ rcx + dsNiceMatch]
/*
; windows:
; parameter 1 in rcx(deflate state s), param 2 in rdx (cur match)
; see http://weblogs.asp.net/oldnewthing/archive/2004/01/14/58579.aspx and
; http://msdn.microsoft.com/library/en-us/kmarch/hh/kmarch/64bitAMD_8e951dd2-ee77-4728-8702-55ce4b5dd24a.xml.asp
;
; All registers must be preserved across the call, except for
; rax, rcx, rdx, r8, r9, r10, and r11, which are scratch.
;
; gcc on macosx-linux:
; see http://www.x86-64.org/documentation/abi-0.99.pdf
; param 1 in rdi, param 2 in rsi
; rbx, rsp, rbp, r12 to r15 must be preserved
;;; Save registers that the compiler may be using, and adjust esp to
;;; make room for our stack frame.
;;; Retrieve the function arguments. r8d will hold cur_match
;;; throughout the entire function. edx will hold the pointer to the
;;; deflate_state structure during the function's setup (before
;;; entering the main loop.
; ms: parameter 1 in rcx (deflate_state* s), param 2 in edx -> r8 (cur match)
; mac: param 1 in rdi, param 2 rsi
; this clear high 32 bits of r8, which can be garbage in both r8 and rdx
*/
mov [save_rbx],rbx
mov [save_rbp],rbp
mov rcx,rdi
mov r8d,esi
mov [save_r12],r12
mov [save_r13],r13
mov [save_r14],r14
mov [save_r15],r15
//;;; uInt wmask = s->w_mask;
//;;; unsigned chain_length = s->max_chain_length;
//;;; if (s->prev_length >= s->good_match) {
//;;; chain_length >>= 2;
//;;; }
mov edi, prev_length
mov esi, good_match
mov eax, WMask
mov ebx, max_chain_length
cmp edi, esi
jl LastMatchGood
shr ebx, 2
LastMatchGood:
//;;; chainlen is decremented once beforehand so that the function can
//;;; use the sign flag instead of the zero flag for the exit test.
//;;; It is then shifted into the high word, to make room for the wmask
//;;; value, which it will always accompany.
dec ebx
shl ebx, 16
or ebx, eax
//;;; on zlib only
//;;; if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
mov eax, nice_match
mov [chainlenwmask], ebx
mov r10d, Lookahead
cmp r10d, eax
cmovnl r10d, eax
mov [nicematch],r10d
//;;; register Bytef *scan = s->window + s->strstart;
mov r10, window_ad
mov ebp, strstart
lea r13, [r10 + rbp]
//;;; Determine how many bytes the scan ptr is off from being
//;;; dword-aligned.
mov r9,r13
neg r13
and r13,3
//;;; IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
//;;; s->strstart - (IPos)MAX_DIST(s) : NIL;
mov eax, window_size
sub eax, MIN_LOOKAHEAD
xor edi,edi
sub ebp, eax
mov r11d, prev_length
cmovng ebp,edi
//;;; int best_len = s->prev_length;
//;;; Store the sum of s->window + best_len in esi locally, and in esi.
lea rsi,[r10+r11]
//;;; register ush scan_start = *(ushf*)scan;
//;;; register ush scan_end = *(ushf*)(scan+best_len-1);
//;;; Posf *prev = s->prev;
movzx r12d,word ptr [r9]
movzx ebx, word ptr [r9 + r11 - 1]
mov rdi, prev_ad
//;;; Jump into the main loop.
mov edx, [chainlenwmask]
cmp bx,word ptr [rsi + r8 - 1]
jz LookupLoopIsZero
LookupLoop1:
and r8d, edx
movzx r8d, word ptr [rdi + r8*2]
cmp r8d, ebp
jbe LeaveNow
sub edx, 0x00010000
BEFORE_JMP
js LeaveNow
AFTER_JMP
LoopEntry1:
cmp bx,word ptr [rsi + r8 - 1]
BEFORE_JMP
jz LookupLoopIsZero
AFTER_JMP
LookupLoop2:
and r8d, edx
movzx r8d, word ptr [rdi + r8*2]
cmp r8d, ebp
BEFORE_JMP
jbe LeaveNow
AFTER_JMP
sub edx, 0x00010000
BEFORE_JMP
js LeaveNow
AFTER_JMP
LoopEntry2:
cmp bx,word ptr [rsi + r8 - 1]
BEFORE_JMP
jz LookupLoopIsZero
AFTER_JMP
LookupLoop4:
and r8d, edx
movzx r8d, word ptr [rdi + r8*2]
cmp r8d, ebp
BEFORE_JMP
jbe LeaveNow
AFTER_JMP
sub edx, 0x00010000
BEFORE_JMP
js LeaveNow
AFTER_JMP
LoopEntry4:
cmp bx,word ptr [rsi + r8 - 1]
BEFORE_JMP
jnz LookupLoop1
jmp LookupLoopIsZero
AFTER_JMP
/*
;;; do {
;;; match = s->window + cur_match;
;;; if (*(ushf*)(match+best_len-1) != scan_end ||
;;; *(ushf*)match != scan_start) continue;
;;; [...]
;;; } while ((cur_match = prev[cur_match & wmask]) > limit
;;; && --chain_length != 0);
;;;
;;; Here is the inner loop of the function. The function will spend the
;;; majority of its time in this loop, and majority of that time will
;;; be spent in the first ten instructions.
;;;
;;; Within this loop:
;;; ebx = scanend
;;; r8d = curmatch
;;; edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
;;; esi = windowbestlen - i.e., (window + bestlen)
;;; edi = prev
;;; ebp = limit
*/
.balign 16
LookupLoop:
and r8d, edx
movzx r8d, word ptr [rdi + r8*2]
cmp r8d, ebp
BEFORE_JMP
jbe LeaveNow
AFTER_JMP
sub edx, 0x00010000
BEFORE_JMP
js LeaveNow
AFTER_JMP
LoopEntry:
cmp bx,word ptr [rsi + r8 - 1]
BEFORE_JMP
jnz LookupLoop1
AFTER_JMP
LookupLoopIsZero:
cmp r12w, word ptr [r10 + r8]
BEFORE_JMP
jnz LookupLoop1
AFTER_JMP
//;;; Store the current value of chainlen.
mov [chainlenwmask], edx
/*
;;; Point edi to the string under scrutiny, and esi to the string we
;;; are hoping to match it up with. In actuality, esi and edi are
;;; both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and edx is
;;; initialized to -(MAX_MATCH_8 - scanalign).
*/
lea rsi,[r8+r10]
mov rdx, 0xfffffffffffffef8 //; -(MAX_MATCH_8)
lea rsi, [rsi + r13 + 0x0108] //;MAX_MATCH_8]
lea rdi, [r9 + r13 + 0x0108] //;MAX_MATCH_8]
prefetcht1 [rsi+rdx]
prefetcht1 [rdi+rdx]
/*
;;; Test the strings for equality, 8 bytes at a time. At the end,
;;; adjust rdx so that it is offset to the exact byte that mismatched.
;;;
;;; We already know at this point that the first three bytes of the
;;; strings match each other, and they can be safely passed over before
;;; starting the compare loop. So what this code does is skip over 0-3
;;; bytes, as much as necessary in order to dword-align the edi
;;; pointer. (rsi will still be misaligned three times out of four.)
;;;
;;; It should be confessed that this loop usually does not represent
;;; much of the total running time. Replacing it with a more
;;; straightforward "rep cmpsb" would not drastically degrade
;;; performance.
*/
LoopCmps:
mov rax, [rsi + rdx]
xor rax, [rdi + rdx]
jnz LeaveLoopCmps
mov rax, [rsi + rdx + 8]
xor rax, [rdi + rdx + 8]
jnz LeaveLoopCmps8
mov rax, [rsi + rdx + 8+8]
xor rax, [rdi + rdx + 8+8]
jnz LeaveLoopCmps16
add rdx,8+8+8
BEFORE_JMP
jnz LoopCmps
jmp LenMaximum
AFTER_JMP
LeaveLoopCmps16: add rdx,8
LeaveLoopCmps8: add rdx,8
LeaveLoopCmps:
test eax, 0x0000FFFF
jnz LenLower
test eax,0xffffffff
jnz LenLower32
add rdx,4
shr rax,32
or ax,ax
BEFORE_JMP
jnz LenLower
AFTER_JMP
LenLower32:
shr eax,16
add rdx,2
LenLower:
sub al, 1
adc rdx, 0
//;;; Calculate the length of the match. If it is longer than MAX_MATCH,
//;;; then automatically accept it as the best possible match and leave.
lea rax, [rdi + rdx]
sub rax, r9
cmp eax, MAX_MATCH
BEFORE_JMP
jge LenMaximum
AFTER_JMP
/*
;;; If the length of the match is not longer than the best match we
;;; have so far, then forget it and return to the lookup loop.
;///////////////////////////////////
*/
cmp eax, r11d
jg LongerMatch
lea rsi,[r10+r11]
mov rdi, prev_ad
mov edx, [chainlenwmask]
BEFORE_JMP
jmp LookupLoop
AFTER_JMP
/*
;;; s->match_start = cur_match;
;;; best_len = len;
;;; if (len >= nice_match) break;
;;; scan_end = *(ushf*)(scan+best_len-1);
*/
LongerMatch:
mov r11d, eax
mov match_start, r8d
cmp eax, [nicematch]
BEFORE_JMP
jge LeaveNow
AFTER_JMP
lea rsi,[r10+rax]
movzx ebx, word ptr [r9 + rax - 1]
mov rdi, prev_ad
mov edx, [chainlenwmask]
BEFORE_JMP
jmp LookupLoop
AFTER_JMP
//;;; Accept the current string, with the maximum possible length.
LenMaximum:
mov r11d,MAX_MATCH
mov match_start, r8d
//;;; if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
//;;; return s->lookahead;
LeaveNow:
mov eax, Lookahead
cmp r11d, eax
cmovng eax, r11d
//;;; Restore the stack and return from whence we came.
// mov rsi,[save_rsi]
// mov rdi,[save_rdi]
mov rbx,[save_rbx]
mov rbp,[save_rbp]
mov r12,[save_r12]
mov r13,[save_r13]
mov r14,[save_r14]
mov r15,[save_r15]
ret 0
//; please don't remove this string !
//; Your can freely use gvmat64 in any free or commercial app
//; but it is far better don't remove the string in the binary!
// db 0dh,0ah,"asm686 with masm, optimised assembly code from Brian Raiter, written 1998, converted to amd 64 by Gilles Vollant 2005",0dh,0ah,0
match_init:
ret 0

1
zlib/contrib/infback9/README Normal file
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See infback9.h for what this is and how to use it.

617
zlib/contrib/infback9/infback9.c Normal file
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/* infback9.c -- inflate deflate64 data using a call-back interface
* Copyright (C) 1995-2008 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "infback9.h"
#include "inftree9.h"
#include "inflate9.h"
#define WSIZE 65536UL
/*
strm provides memory allocation functions in zalloc and zfree, or
Z_NULL to use the library memory allocation functions.
window is a user-supplied window and output buffer that is 64K bytes.
*/
int ZEXPORT inflateBack9Init_(strm, window, version, stream_size)
z_stream FAR *strm;
unsigned char FAR *window;
const char *version;
int stream_size;
{
struct inflate_state FAR *state;
if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
stream_size != (int)(sizeof(z_stream)))
return Z_VERSION_ERROR;
if (strm == Z_NULL || window == Z_NULL)
return Z_STREAM_ERROR;
strm->msg = Z_NULL; /* in case we return an error */
if (strm->zalloc == (alloc_func)0) {
strm->zalloc = zcalloc;
strm->opaque = (voidpf)0;
}
if (strm->zfree == (free_func)0) strm->zfree = zcfree;
state = (struct inflate_state FAR *)ZALLOC(strm, 1,
sizeof(struct inflate_state));
if (state == Z_NULL) return Z_MEM_ERROR;
Tracev((stderr, "inflate: allocated\n"));
strm->state = (voidpf)state;
state->window = window;
return Z_OK;
}
/*
Build and output length and distance decoding tables for fixed code
decoding.
*/
#ifdef MAKEFIXED
#include <stdio.h>
void makefixed9(void)
{
unsigned sym, bits, low, size;
code *next, *lenfix, *distfix;
struct inflate_state state;
code fixed[544];
/* literal/length table */
sym = 0;
while (sym < 144) state.lens[sym++] = 8;
while (sym < 256) state.lens[sym++] = 9;
while (sym < 280) state.lens[sym++] = 7;
while (sym < 288) state.lens[sym++] = 8;
next = fixed;
lenfix = next;
bits = 9;
inflate_table9(LENS, state.lens, 288, &(next), &(bits), state.work);
/* distance table */
sym = 0;
while (sym < 32) state.lens[sym++] = 5;
distfix = next;
bits = 5;
inflate_table9(DISTS, state.lens, 32, &(next), &(bits), state.work);
/* write tables */
puts(" /* inffix9.h -- table for decoding deflate64 fixed codes");
puts(" * Generated automatically by makefixed9().");
puts(" */");
puts("");
puts(" /* WARNING: this file should *not* be used by applications.");
puts(" It is part of the implementation of this library and is");
puts(" subject to change. Applications should only use zlib.h.");
puts(" */");
puts("");
size = 1U << 9;
printf(" static const code lenfix[%u] = {", size);
low = 0;
for (;;) {
if ((low % 6) == 0) printf("\n ");
printf("{%u,%u,%d}", lenfix[low].op, lenfix[low].bits,
lenfix[low].val);
if (++low == size) break;
putchar(',');
}
puts("\n };");
size = 1U << 5;
printf("\n static const code distfix[%u] = {", size);
low = 0;
for (;;) {
if ((low % 5) == 0) printf("\n ");
printf("{%u,%u,%d}", distfix[low].op, distfix[low].bits,
distfix[low].val);
if (++low == size) break;
putchar(',');
}
puts("\n };");
}
#endif /* MAKEFIXED */
/* Macros for inflateBack(): */
/* Clear the input bit accumulator */
#define INITBITS() \
do { \
hold = 0; \
bits = 0; \
} while (0)
/* Assure that some input is available. If input is requested, but denied,
then return a Z_BUF_ERROR from inflateBack(). */
#define PULL() \
do { \
if (have == 0) { \
have = in(in_desc, &next); \
if (have == 0) { \
next = Z_NULL; \
ret = Z_BUF_ERROR; \
goto inf_leave; \
} \
} \
} while (0)
/* Get a byte of input into the bit accumulator, or return from inflateBack()
with an error if there is no input available. */
#define PULLBYTE() \
do { \
PULL(); \
have--; \
hold += (unsigned long)(*next++) << bits; \
bits += 8; \
} while (0)
/* Assure that there are at least n bits in the bit accumulator. If there is
not enough available input to do that, then return from inflateBack() with
an error. */
#define NEEDBITS(n) \
do { \
while (bits < (unsigned)(n)) \
PULLBYTE(); \
} while (0)
/* Return the low n bits of the bit accumulator (n <= 16) */
#define BITS(n) \
((unsigned)hold & ((1U << (n)) - 1))
/* Remove n bits from the bit accumulator */
#define DROPBITS(n) \
do { \
hold >>= (n); \
bits -= (unsigned)(n); \
} while (0)
/* Remove zero to seven bits as needed to go to a byte boundary */
#define BYTEBITS() \
do { \
hold >>= bits & 7; \
bits -= bits & 7; \
} while (0)
/* Assure that some output space is available, by writing out the window
if it's full. If the write fails, return from inflateBack() with a
Z_BUF_ERROR. */
#define ROOM() \
do { \
if (left == 0) { \
put = window; \
left = WSIZE; \
wrap = 1; \
if (out(out_desc, put, (unsigned)left)) { \
ret = Z_BUF_ERROR; \
goto inf_leave; \
} \
} \
} while (0)
/*
strm provides the memory allocation functions and window buffer on input,
and provides information on the unused input on return. For Z_DATA_ERROR
returns, strm will also provide an error message.
in() and out() are the call-back input and output functions. When
inflateBack() needs more input, it calls in(). When inflateBack() has
filled the window with output, or when it completes with data in the
window, it calls out() to write out the data. The application must not
change the provided input until in() is called again or inflateBack()
returns. The application must not change the window/output buffer until
inflateBack() returns.
in() and out() are called with a descriptor parameter provided in the
inflateBack() call. This parameter can be a structure that provides the
information required to do the read or write, as well as accumulated
information on the input and output such as totals and check values.
in() should return zero on failure. out() should return non-zero on
failure. If either in() or out() fails, than inflateBack() returns a
Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it
was in() or out() that caused in the error. Otherwise, inflateBack()
returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
error, or Z_MEM_ERROR if it could not allocate memory for the state.
inflateBack() can also return Z_STREAM_ERROR if the input parameters
are not correct, i.e. strm is Z_NULL or the state was not initialized.
*/
int ZEXPORT inflateBack9(strm, in, in_desc, out, out_desc)
z_stream FAR *strm;
in_func in;
void FAR *in_desc;
out_func out;
void FAR *out_desc;
{
struct inflate_state FAR *state;
unsigned char FAR *next; /* next input */
unsigned char FAR *put; /* next output */
unsigned have; /* available input */
unsigned long left; /* available output */
inflate_mode mode; /* current inflate mode */
int lastblock; /* true if processing last block */
int wrap; /* true if the window has wrapped */
unsigned long write; /* window write index */
unsigned char FAR *window; /* allocated sliding window, if needed */
unsigned long hold; /* bit buffer */
unsigned bits; /* bits in bit buffer */
unsigned extra; /* extra bits needed */
unsigned long length; /* literal or length of data to copy */
unsigned long offset; /* distance back to copy string from */
unsigned long copy; /* number of stored or match bytes to copy */
unsigned char FAR *from; /* where to copy match bytes from */
code const FAR *lencode; /* starting table for length/literal codes */
code const FAR *distcode; /* starting table for distance codes */
unsigned lenbits; /* index bits for lencode */
unsigned distbits; /* index bits for distcode */
code here; /* current decoding table entry */
code last; /* parent table entry */
unsigned len; /* length to copy for repeats, bits to drop */
int ret; /* return code */
static const unsigned short order[19] = /* permutation of code lengths */
{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
#include "inffix9.h"
/* Check that the strm exists and that the state was initialized */
if (strm == Z_NULL || strm->state == Z_NULL)
return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
/* Reset the state */
strm->msg = Z_NULL;
mode = TYPE;
lastblock = 0;
write = 0;
wrap = 0;
window = state->window;
next = strm->next_in;
have = next != Z_NULL ? strm->avail_in : 0;
hold = 0;
bits = 0;
put = window;
left = WSIZE;
lencode = Z_NULL;
distcode = Z_NULL;
/* Inflate until end of block marked as last */
for (;;)
switch (mode) {
case TYPE:
/* determine and dispatch block type */
if (lastblock) {
BYTEBITS();
mode = DONE;
break;
}
NEEDBITS(3);
lastblock = BITS(1);
DROPBITS(1);
switch (BITS(2)) {
case 0: /* stored block */
Tracev((stderr, "inflate: stored block%s\n",
lastblock ? " (last)" : ""));
mode = STORED;
break;
case 1: /* fixed block */
lencode = lenfix;
lenbits = 9;
distcode = distfix;
distbits = 5;
Tracev((stderr, "inflate: fixed codes block%s\n",
lastblock ? " (last)" : ""));
mode = LEN; /* decode codes */
break;
case 2: /* dynamic block */
Tracev((stderr, "inflate: dynamic codes block%s\n",
lastblock ? " (last)" : ""));
mode = TABLE;
break;
case 3:
strm->msg = (char *)"invalid block type";
mode = BAD;
}
DROPBITS(2);
break;
case STORED:
/* get and verify stored block length */
BYTEBITS(); /* go to byte boundary */
NEEDBITS(32);
if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
strm->msg = (char *)"invalid stored block lengths";
mode = BAD;
break;
}
length = (unsigned)hold & 0xffff;
Tracev((stderr, "inflate: stored length %lu\n",
length));
INITBITS();
/* copy stored block from input to output */
while (length != 0) {
copy = length;
PULL();
ROOM();
if (copy > have) copy = have;
if (copy > left) copy = left;
zmemcpy(put, next, copy);
have -= copy;
next += copy;
left -= copy;
put += copy;
length -= copy;
}
Tracev((stderr, "inflate: stored end\n"));
mode = TYPE;
break;
case TABLE:
/* get dynamic table entries descriptor */
NEEDBITS(14);
state->nlen = BITS(5) + 257;
DROPBITS(5);
state->ndist = BITS(5) + 1;
DROPBITS(5);
state->ncode = BITS(4) + 4;
DROPBITS(4);
if (state->nlen > 286) {
strm->msg = (char *)"too many length symbols";
mode = BAD;
break;
}
Tracev((stderr, "inflate: table sizes ok\n"));
/* get code length code lengths (not a typo) */
state->have = 0;
while (state->have < state->ncode) {
NEEDBITS(3);
state->lens[order[state->have++]] = (unsigned short)BITS(3);
DROPBITS(3);
}
while (state->have < 19)
state->lens[order[state->have++]] = 0;
state->next = state->codes;
lencode = (code const FAR *)(state->next);
lenbits = 7;
ret = inflate_table9(CODES, state->lens, 19, &(state->next),
&(lenbits), state->work);
if (ret) {
strm->msg = (char *)"invalid code lengths set";
mode = BAD;
break;
}
Tracev((stderr, "inflate: code lengths ok\n"));
/* get length and distance code code lengths */
state->have = 0;
while (state->have < state->nlen + state->ndist) {
for (;;) {
here = lencode[BITS(lenbits)];
if ((unsigned)(here.bits) <= bits) break;
PULLBYTE();
}
if (here.val < 16) {
NEEDBITS(here.bits);
DROPBITS(here.bits);
state->lens[state->have++] = here.val;
}
else {
if (here.val == 16) {
NEEDBITS(here.bits + 2);
DROPBITS(here.bits);
if (state->have == 0) {
strm->msg = (char *)"invalid bit length repeat";
mode = BAD;
break;
}
len = (unsigned)(state->lens[state->have - 1]);
copy = 3 + BITS(2);
DROPBITS(2);
}
else if (here.val == 17) {
NEEDBITS(here.bits + 3);
DROPBITS(here.bits);
len = 0;
copy = 3 + BITS(3);
DROPBITS(3);
}
else {
NEEDBITS(here.bits + 7);
DROPBITS(here.bits);
len = 0;
copy = 11 + BITS(7);
DROPBITS(7);
}
if (state->have + copy > state->nlen + state->ndist) {
strm->msg = (char *)"invalid bit length repeat";
mode = BAD;
break;
}
while (copy--)
state->lens[state->have++] = (unsigned short)len;
}
}
/* handle error breaks in while */
if (mode == BAD) break;
/* check for end-of-block code (better have one) */
if (state->lens[256] == 0) {
strm->msg = (char *)"invalid code -- missing end-of-block";
mode = BAD;
break;
}
/* build code tables -- note: do not change the lenbits or distbits
values here (9 and 6) without reading the comments in inftree9.h
concerning the ENOUGH constants, which depend on those values */
state->next = state->codes;
lencode = (code const FAR *)(state->next);
lenbits = 9;
ret = inflate_table9(LENS, state->lens, state->nlen,
&(state->next), &(lenbits), state->work);
if (ret) {
strm->msg = (char *)"invalid literal/lengths set";
mode = BAD;
break;
}
distcode = (code const FAR *)(state->next);
distbits = 6;
ret = inflate_table9(DISTS, state->lens + state->nlen,
state->ndist, &(state->next), &(distbits),
state->work);
if (ret) {
strm->msg = (char *)"invalid distances set";
mode = BAD;
break;
}
Tracev((stderr, "inflate: codes ok\n"));
mode = LEN;
case LEN:
/* get a literal, length, or end-of-block code */
for (;;) {
here = lencode[BITS(lenbits)];
if ((unsigned)(here.bits) <= bits) break;
PULLBYTE();
}
if (here.op && (here.op & 0xf0) == 0) {
last = here;
for (;;) {
here = lencode[last.val +
(BITS(last.bits + last.op) >> last.bits)];
if ((unsigned)(last.bits + here.bits) <= bits) break;
PULLBYTE();
}
DROPBITS(last.bits);
}
DROPBITS(here.bits);
length = (unsigned)here.val;
/* process literal */
if (here.op == 0) {
Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
"inflate: literal '%c'\n" :
"inflate: literal 0x%02x\n", here.val));
ROOM();
*put++ = (unsigned char)(length);
left--;
mode = LEN;
break;
}
/* process end of block */
if (here.op & 32) {
Tracevv((stderr, "inflate: end of block\n"));
mode = TYPE;
break;
}
/* invalid code */
if (here.op & 64) {
strm->msg = (char *)"invalid literal/length code";
mode = BAD;
break;
}
/* length code -- get extra bits, if any */
extra = (unsigned)(here.op) & 31;
if (extra != 0) {
NEEDBITS(extra);
length += BITS(extra);
DROPBITS(extra);
}
Tracevv((stderr, "inflate: length %lu\n", length));
/* get distance code */
for (;;) {
here = distcode[BITS(distbits)];
if ((unsigned)(here.bits) <= bits) break;
PULLBYTE();
}
if ((here.op & 0xf0) == 0) {
last = here;
for (;;) {
here = distcode[last.val +
(BITS(last.bits + last.op) >> last.bits)];
if ((unsigned)(last.bits + here.bits) <= bits) break;
PULLBYTE();
}
DROPBITS(last.bits);
}
DROPBITS(here.bits);
if (here.op & 64) {
strm->msg = (char *)"invalid distance code";
mode = BAD;
break;
}
offset = (unsigned)here.val;
/* get distance extra bits, if any */
extra = (unsigned)(here.op) & 15;
if (extra != 0) {
NEEDBITS(extra);
offset += BITS(extra);
DROPBITS(extra);
}
if (offset > WSIZE - (wrap ? 0: left)) {
strm->msg = (char *)"invalid distance too far back";
mode = BAD;
break;
}
Tracevv((stderr, "inflate: distance %lu\n", offset));
/* copy match from window to output */
do {
ROOM();
copy = WSIZE - offset;
if (copy < left) {
from = put + copy;
copy = left - copy;
}
else {
from = put - offset;
copy = left;
}
if (copy > length) copy = length;
length -= copy;
left -= copy;
do {
*put++ = *from++;
} while (--copy);
} while (length != 0);
break;
case DONE:
/* inflate stream terminated properly -- write leftover output */
ret = Z_STREAM_END;
if (left < WSIZE) {
if (out(out_desc, window, (unsigned)(WSIZE - left)))
ret = Z_BUF_ERROR;
}
goto inf_leave;
case BAD:
ret = Z_DATA_ERROR;
goto inf_leave;
default: /* can't happen, but makes compilers happy */
ret = Z_STREAM_ERROR;
goto inf_leave;
}
/* Return unused input */
inf_leave:
strm->next_in = next;
strm->avail_in = have;
return ret;
}
int ZEXPORT inflateBack9End(strm)
z_stream FAR *strm;
{
if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
return Z_STREAM_ERROR;
ZFREE(strm, strm->state);
strm->state = Z_NULL;
Tracev((stderr, "inflate: end\n"));
return Z_OK;
}

37
zlib/contrib/infback9/infback9.h Normal file
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/* infback9.h -- header for using inflateBack9 functions
* Copyright (C) 2003 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/*
* This header file and associated patches provide a decoder for PKWare's
* undocumented deflate64 compression method (method 9). Use with infback9.c,
* inftree9.h, inftree9.c, and inffix9.h. These patches are not supported.
* This should be compiled with zlib, since it uses zutil.h and zutil.o.
* This code has not yet been tested on 16-bit architectures. See the
* comments in zlib.h for inflateBack() usage. These functions are used
* identically, except that there is no windowBits parameter, and a 64K
* window must be provided. Also if int's are 16 bits, then a zero for
* the third parameter of the "out" function actually means 65536UL.
* zlib.h must be included before this header file.
*/
#ifdef __cplusplus
extern "C" {
#endif
ZEXTERN int ZEXPORT inflateBack9 OF((z_stream FAR *strm,
in_func in, void FAR *in_desc,
out_func out, void FAR *out_desc));
ZEXTERN int ZEXPORT inflateBack9End OF((z_stream FAR *strm));
ZEXTERN int ZEXPORT inflateBack9Init_ OF((z_stream FAR *strm,
unsigned char FAR *window,
const char *version,
int stream_size));
#define inflateBack9Init(strm, window) \
inflateBack9Init_((strm), (window), \
ZLIB_VERSION, sizeof(z_stream))
#ifdef __cplusplus
}
#endif

107
zlib/contrib/infback9/inffix9.h Normal file
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/* inffix9.h -- table for decoding deflate64 fixed codes
* Generated automatically by makefixed9().
*/
/* WARNING: this file should *not* be used by applications.
It is part of the implementation of this library and is
subject to change. Applications should only use zlib.h.
*/
static const code lenfix[512] = {
{96,7,0},{0,8,80},{0,8,16},{132,8,115},{130,7,31},{0,8,112},
{0,8,48},{0,9,192},{128,7,10},{0,8,96},{0,8,32},{0,9,160},
{0,8,0},{0,8,128},{0,8,64},{0,9,224},{128,7,6},{0,8,88},
{0,8,24},{0,9,144},{131,7,59},{0,8,120},{0,8,56},{0,9,208},
{129,7,17},{0,8,104},{0,8,40},{0,9,176},{0,8,8},{0,8,136},
{0,8,72},{0,9,240},{128,7,4},{0,8,84},{0,8,20},{133,8,227},
{131,7,43},{0,8,116},{0,8,52},{0,9,200},{129,7,13},{0,8,100},
{0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},
{128,7,8},{0,8,92},{0,8,28},{0,9,152},{132,7,83},{0,8,124},
{0,8,60},{0,9,216},{130,7,23},{0,8,108},{0,8,44},{0,9,184},
{0,8,12},{0,8,140},{0,8,76},{0,9,248},{128,7,3},{0,8,82},
{0,8,18},{133,8,163},{131,7,35},{0,8,114},{0,8,50},{0,9,196},
{129,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},{0,8,130},
{0,8,66},{0,9,228},{128,7,7},{0,8,90},{0,8,26},{0,9,148},
{132,7,67},{0,8,122},{0,8,58},{0,9,212},{130,7,19},{0,8,106},
{0,8,42},{0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},
{128,7,5},{0,8,86},{0,8,22},{65,8,0},{131,7,51},{0,8,118},
{0,8,54},{0,9,204},{129,7,15},{0,8,102},{0,8,38},{0,9,172},
{0,8,6},{0,8,134},{0,8,70},{0,9,236},{128,7,9},{0,8,94},
{0,8,30},{0,9,156},{132,7,99},{0,8,126},{0,8,62},{0,9,220},
{130,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
{0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{133,8,131},
{130,7,31},{0,8,113},{0,8,49},{0,9,194},{128,7,10},{0,8,97},
{0,8,33},{0,9,162},{0,8,1},{0,8,129},{0,8,65},{0,9,226},
{128,7,6},{0,8,89},{0,8,25},{0,9,146},{131,7,59},{0,8,121},
{0,8,57},{0,9,210},{129,7,17},{0,8,105},{0,8,41},{0,9,178},
{0,8,9},{0,8,137},{0,8,73},{0,9,242},{128,7,4},{0,8,85},
{0,8,21},{144,8,3},{131,7,43},{0,8,117},{0,8,53},{0,9,202},
{129,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},
{0,8,69},{0,9,234},{128,7,8},{0,8,93},{0,8,29},{0,9,154},
{132,7,83},{0,8,125},{0,8,61},{0,9,218},{130,7,23},{0,8,109},
{0,8,45},{0,9,186},{0,8,13},{0,8,141},{0,8,77},{0,9,250},
{128,7,3},{0,8,83},{0,8,19},{133,8,195},{131,7,35},{0,8,115},
{0,8,51},{0,9,198},{129,7,11},{0,8,99},{0,8,35},{0,9,166},
{0,8,3},{0,8,131},{0,8,67},{0,9,230},{128,7,7},{0,8,91},
{0,8,27},{0,9,150},{132,7,67},{0,8,123},{0,8,59},{0,9,214},
{130,7,19},{0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},
{0,8,75},{0,9,246},{128,7,5},{0,8,87},{0,8,23},{77,8,0},
{131,7,51},{0,8,119},{0,8,55},{0,9,206},{129,7,15},{0,8,103},
{0,8,39},{0,9,174},{0,8,7},{0,8,135},{0,8,71},{0,9,238},
{128,7,9},{0,8,95},{0,8,31},{0,9,158},{132,7,99},{0,8,127},
{0,8,63},{0,9,222},{130,7,27},{0,8,111},{0,8,47},{0,9,190},
{0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},
{0,8,16},{132,8,115},{130,7,31},{0,8,112},{0,8,48},{0,9,193},
{128,7,10},{0,8,96},{0,8,32},{0,9,161},{0,8,0},{0,8,128},
{0,8,64},{0,9,225},{128,7,6},{0,8,88},{0,8,24},{0,9,145},
{131,7,59},{0,8,120},{0,8,56},{0,9,209},{129,7,17},{0,8,104},
{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},{0,9,241},
{128,7,4},{0,8,84},{0,8,20},{133,8,227},{131,7,43},{0,8,116},
{0,8,52},{0,9,201},{129,7,13},{0,8,100},{0,8,36},{0,9,169},
{0,8,4},{0,8,132},{0,8,68},{0,9,233},{128,7,8},{0,8,92},
{0,8,28},{0,9,153},{132,7,83},{0,8,124},{0,8,60},{0,9,217},
{130,7,23},{0,8,108},{0,8,44},{0,9,185},{0,8,12},{0,8,140},
{0,8,76},{0,9,249},{128,7,3},{0,8,82},{0,8,18},{133,8,163},
{131,7,35},{0,8,114},{0,8,50},{0,9,197},{129,7,11},{0,8,98},
{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
{128,7,7},{0,8,90},{0,8,26},{0,9,149},{132,7,67},{0,8,122},
{0,8,58},{0,9,213},{130,7,19},{0,8,106},{0,8,42},{0,9,181},
{0,8,10},{0,8,138},{0,8,74},{0,9,245},{128,7,5},{0,8,86},
{0,8,22},{65,8,0},{131,7,51},{0,8,118},{0,8,54},{0,9,205},
{129,7,15},{0,8,102},{0,8,38},{0,9,173},{0,8,6},{0,8,134},
{0,8,70},{0,9,237},{128,7,9},{0,8,94},{0,8,30},{0,9,157},
{132,7,99},{0,8,126},{0,8,62},{0,9,221},{130,7,27},{0,8,110},
{0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},
{96,7,0},{0,8,81},{0,8,17},{133,8,131},{130,7,31},{0,8,113},
{0,8,49},{0,9,195},{128,7,10},{0,8,97},{0,8,33},{0,9,163},
{0,8,1},{0,8,129},{0,8,65},{0,9,227},{128,7,6},{0,8,89},
{0,8,25},{0,9,147},{131,7,59},{0,8,121},{0,8,57},{0,9,211},
{129,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},{0,8,137},
{0,8,73},{0,9,243},{128,7,4},{0,8,85},{0,8,21},{144,8,3},
{131,7,43},{0,8,117},{0,8,53},{0,9,203},{129,7,13},{0,8,101},
{0,8,37},{0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},
{128,7,8},{0,8,93},{0,8,29},{0,9,155},{132,7,83},{0,8,125},
{0,8,61},{0,9,219},{130,7,23},{0,8,109},{0,8,45},{0,9,187},
{0,8,13},{0,8,141},{0,8,77},{0,9,251},{128,7,3},{0,8,83},
{0,8,19},{133,8,195},{131,7,35},{0,8,115},{0,8,51},{0,9,199},
{129,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
{0,8,67},{0,9,231},{128,7,7},{0,8,91},{0,8,27},{0,9,151},
{132,7,67},{0,8,123},{0,8,59},{0,9,215},{130,7,19},{0,8,107},
{0,8,43},{0,9,183},{0,8,11},{0,8,139},{0,8,75},{0,9,247},
{128,7,5},{0,8,87},{0,8,23},{77,8,0},{131,7,51},{0,8,119},
{0,8,55},{0,9,207},{129,7,15},{0,8,103},{0,8,39},{0,9,175},
{0,8,7},{0,8,135},{0,8,71},{0,9,239},{128,7,9},{0,8,95},
{0,8,31},{0,9,159},{132,7,99},{0,8,127},{0,8,63},{0,9,223},
{130,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},
{0,8,79},{0,9,255}
};
static const code distfix[32] = {
{128,5,1},{135,5,257},{131,5,17},{139,5,4097},{129,5,5},
{137,5,1025},{133,5,65},{141,5,16385},{128,5,3},{136,5,513},
{132,5,33},{140,5,8193},{130,5,9},{138,5,2049},{134,5,129},
{142,5,32769},{128,5,2},{135,5,385},{131,5,25},{139,5,6145},
{129,5,7},{137,5,1537},{133,5,97},{141,5,24577},{128,5,4},
{136,5,769},{132,5,49},{140,5,12289},{130,5,13},{138,5,3073},
{134,5,193},{142,5,49153}
};

47
zlib/contrib/infback9/inflate9.h Normal file
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/* inflate9.h -- internal inflate state definition
* Copyright (C) 1995-2003 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/* Possible inflate modes between inflate() calls */
typedef enum {
TYPE, /* i: waiting for type bits, including last-flag bit */
STORED, /* i: waiting for stored size (length and complement) */
TABLE, /* i: waiting for dynamic block table lengths */
LEN, /* i: waiting for length/lit code */
DONE, /* finished check, done -- remain here until reset */
BAD /* got a data error -- remain here until reset */
} inflate_mode;
/*
State transitions between above modes -
(most modes can go to the BAD mode -- not shown for clarity)
Read deflate blocks:
TYPE -> STORED or TABLE or LEN or DONE
STORED -> TYPE
TABLE -> LENLENS -> CODELENS -> LEN
Read deflate codes:
LEN -> LEN or TYPE
*/
/* state maintained between inflate() calls. Approximately 7K bytes. */
struct inflate_state {
/* sliding window */
unsigned char FAR *window; /* allocated sliding window, if needed */
/* dynamic table building */
unsigned ncode; /* number of code length code lengths */
unsigned nlen; /* number of length code lengths */
unsigned ndist; /* number of distance code lengths */
unsigned have; /* number of code lengths in lens[] */
code FAR *next; /* next available space in codes[] */
unsigned short lens[320]; /* temporary storage for code lengths */
unsigned short work[288]; /* work area for code table building */
code codes[ENOUGH]; /* space for code tables */
};

324
zlib/contrib/infback9/inftree9.c Normal file
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/* inftree9.c -- generate Huffman trees for efficient decoding
* Copyright (C) 1995-2012 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftree9.h"
#define MAXBITS 15
const char inflate9_copyright[] =
" inflate9 1.2.7 Copyright 1995-2012 Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
include such an acknowledgment, I would appreciate that you keep this
copyright string in the executable of your product.
*/
/*
Build a set of tables to decode the provided canonical Huffman code.
The code lengths are lens[0..codes-1]. The result starts at *table,
whose indices are 0..2^bits-1. work is a writable array of at least
lens shorts, which is used as a work area. type is the type of code
to be generated, CODES, LENS, or DISTS. On return, zero is success,
-1 is an invalid code, and +1 means that ENOUGH isn't enough. table
on return points to the next available entry's address. bits is the
requested root table index bits, and on return it is the actual root
table index bits. It will differ if the request is greater than the
longest code or if it is less than the shortest code.
*/
int inflate_table9(type, lens, codes, table, bits, work)
codetype type;
unsigned short FAR *lens;
unsigned codes;
code FAR * FAR *table;
unsigned FAR *bits;
unsigned short FAR *work;
{
unsigned len; /* a code's length in bits */
unsigned sym; /* index of code symbols */
unsigned min, max; /* minimum and maximum code lengths */
unsigned root; /* number of index bits for root table */
unsigned curr; /* number of index bits for current table */
unsigned drop; /* code bits to drop for sub-table */
int left; /* number of prefix codes available */
unsigned used; /* code entries in table used */
unsigned huff; /* Huffman code */
unsigned incr; /* for incrementing code, index */
unsigned fill; /* index for replicating entries */
unsigned low; /* low bits for current root entry */
unsigned mask; /* mask for low root bits */
code this; /* table entry for duplication */
code FAR *next; /* next available space in table */
const unsigned short FAR *base; /* base value table to use */
const unsigned short FAR *extra; /* extra bits table to use */
int end; /* use base and extra for symbol > end */
unsigned short count[MAXBITS+1]; /* number of codes of each length */
unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
static const unsigned short lbase[31] = { /* Length codes 257..285 base */
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17,
19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115,
131, 163, 195, 227, 3, 0, 0};
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
133, 133, 133, 133, 144, 78, 68};
static const unsigned short dbase[32] = { /* Distance codes 0..31 base */
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49,
65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073,
4097, 6145, 8193, 12289, 16385, 24577, 32769, 49153};
static const unsigned short dext[32] = { /* Distance codes 0..31 extra */
128, 128, 128, 128, 129, 129, 130, 130, 131, 131, 132, 132,
133, 133, 134, 134, 135, 135, 136, 136, 137, 137, 138, 138,
139, 139, 140, 140, 141, 141, 142, 142};
/*
Process a set of code lengths to create a canonical Huffman code. The
code lengths are lens[0..codes-1]. Each length corresponds to the
symbols 0..codes-1. The Huffman code is generated by first sorting the
symbols by length from short to long, and retaining the symbol order
for codes with equal lengths. Then the code starts with all zero bits
for the first code of the shortest length, and the codes are integer
increments for the same length, and zeros are appended as the length
increases. For the deflate format, these bits are stored backwards
from their more natural integer increment ordering, and so when the
decoding tables are built in the large loop below, the integer codes
are incremented backwards.
This routine assumes, but does not check, that all of the entries in
lens[] are in the range 0..MAXBITS. The caller must assure this.
1..MAXBITS is interpreted as that code length. zero means that that
symbol does not occur in this code.
The codes are sorted by computing a count of codes for each length,
creating from that a table of starting indices for each length in the
sorted table, and then entering the symbols in order in the sorted
table. The sorted table is work[], with that space being provided by
the caller.
The length counts are used for other purposes as well, i.e. finding
the minimum and maximum length codes, determining if there are any
codes at all, checking for a valid set of lengths, and looking ahead
at length counts to determine sub-table sizes when building the
decoding tables.
*/
/* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
for (len = 0; len <= MAXBITS; len++)
count[len] = 0;
for (sym = 0; sym < codes; sym++)
count[lens[sym]]++;
/* bound code lengths, force root to be within code lengths */
root = *bits;
for (max = MAXBITS; max >= 1; max--)
if (count[max] != 0) break;
if (root > max) root = max;
if (max == 0) return -1; /* no codes! */
for (min = 1; min <= MAXBITS; min++)
if (count[min] != 0) break;
if (root < min) root = min;
/* check for an over-subscribed or incomplete set of lengths */
left = 1;
for (len = 1; len <= MAXBITS; len++) {
left <<= 1;
left -= count[len];
if (left < 0) return -1; /* over-subscribed */
}
if (left > 0 && (type == CODES || max != 1))
return -1; /* incomplete set */
/* generate offsets into symbol table for each length for sorting */
offs[1] = 0;
for (len = 1; len < MAXBITS; len++)
offs[len + 1] = offs[len] + count[len];
/* sort symbols by length, by symbol order within each length */
for (sym = 0; sym < codes; sym++)
if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
/*
Create and fill in decoding tables. In this loop, the table being
filled is at next and has curr index bits. The code being used is huff
with length len. That code is converted to an index by dropping drop
bits off of the bottom. For codes where len is less than drop + curr,
those top drop + curr - len bits are incremented through all values to
fill the table with replicated entries.
root is the number of index bits for the root table. When len exceeds
root, sub-tables are created pointed to by the root entry with an index
of the low root bits of huff. This is saved in low to check for when a
new sub-table should be started. drop is zero when the root table is
being filled, and drop is root when sub-tables are being filled.
When a new sub-table is needed, it is necessary to look ahead in the
code lengths to determine what size sub-table is needed. The length
counts are used for this, and so count[] is decremented as codes are
entered in the tables.
used keeps track of how many table entries have been allocated from the
provided *table space. It is checked for LENS and DIST tables against
the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in
the initial root table size constants. See the comments in inftree9.h
for more information.
sym increments through all symbols, and the loop terminates when
all codes of length max, i.e. all codes, have been processed. This
routine permits incomplete codes, so another loop after this one fills
in the rest of the decoding tables with invalid code markers.
*/
/* set up for code type */
switch (type) {
case CODES:
base = extra = work; /* dummy value--not used */
end = 19;
break;
case LENS:
base = lbase;
base -= 257;
extra = lext;
extra -= 257;
end = 256;
break;
default: /* DISTS */
base = dbase;
extra = dext;
end = -1;
}
/* initialize state for loop */
huff = 0; /* starting code */
sym = 0; /* starting code symbol */
len = min; /* starting code length */
next = *table; /* current table to fill in */
curr = root; /* current table index bits */
drop = 0; /* current bits to drop from code for index */
low = (unsigned)(-1); /* trigger new sub-table when len > root */
used = 1U << root; /* use root table entries */
mask = used - 1; /* mask for comparing low */
/* check available table space */
if ((type == LENS && used >= ENOUGH_LENS) ||
(type == DISTS && used >= ENOUGH_DISTS))
return 1;
/* process all codes and make table entries */
for (;;) {
/* create table entry */
this.bits = (unsigned char)(len - drop);
if ((int)(work[sym]) < end) {
this.op = (unsigned char)0;
this.val = work[sym];
}
else if ((int)(work[sym]) > end) {
this.op = (unsigned char)(extra[work[sym]]);
this.val = base[work[sym]];
}
else {
this.op = (unsigned char)(32 + 64); /* end of block */
this.val = 0;
}
/* replicate for those indices with low len bits equal to huff */
incr = 1U << (len - drop);
fill = 1U << curr;
do {
fill -= incr;
next[(huff >> drop) + fill] = this;
} while (fill != 0);
/* backwards increment the len-bit code huff */
incr = 1U << (len - 1);
while (huff & incr)
incr >>= 1;
if (incr != 0) {
huff &= incr - 1;
huff += incr;
}
else
huff = 0;
/* go to next symbol, update count, len */
sym++;
if (--(count[len]) == 0) {
if (len == max) break;
len = lens[work[sym]];
}
/* create new sub-table if needed */
if (len > root && (huff & mask) != low) {
/* if first time, transition to sub-tables */
if (drop == 0)
drop = root;
/* increment past last table */
next += 1U << curr;
/* determine length of next table */
curr = len - drop;
left = (int)(1 << curr);
while (curr + drop < max) {
left -= count[curr + drop];
if (left <= 0) break;
curr++;
left <<= 1;
}
/* check for enough space */
used += 1U << curr;
if ((type == LENS && used >= ENOUGH_LENS) ||
(type == DISTS && used >= ENOUGH_DISTS))
return 1;
/* point entry in root table to sub-table */
low = huff & mask;
(*table)[low].op = (unsigned char)curr;
(*table)[low].bits = (unsigned char)root;
(*table)[low].val = (unsigned short)(next - *table);
}
}
/*
Fill in rest of table for incomplete codes. This loop is similar to the
loop above in incrementing huff for table indices. It is assumed that
len is equal to curr + drop, so there is no loop needed to increment
through high index bits. When the current sub-table is filled, the loop
drops back to the root table to fill in any remaining entries there.
*/
this.op = (unsigned char)64; /* invalid code marker */
this.bits = (unsigned char)(len - drop);
this.val = (unsigned short)0;
while (huff != 0) {
/* when done with sub-table, drop back to root table */
if (drop != 0 && (huff & mask) != low) {
drop = 0;
len = root;
next = *table;
curr = root;
this.bits = (unsigned char)len;
}
/* put invalid code marker in table */
next[huff >> drop] = this;
/* backwards increment the len-bit code huff */
incr = 1U << (len - 1);
while (huff & incr)
incr >>= 1;
if (incr != 0) {
huff &= incr - 1;
huff += incr;
}
else
huff = 0;
}
/* set return parameters */
*table += used;
*bits = root;
return 0;
}

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/* inftree9.h -- header to use inftree9.c
* Copyright (C) 1995-2008 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/* Structure for decoding tables. Each entry provides either the
information needed to do the operation requested by the code that
indexed that table entry, or it provides a pointer to another
table that indexes more bits of the code. op indicates whether
the entry is a pointer to another table, a literal, a length or
distance, an end-of-block, or an invalid code. For a table
pointer, the low four bits of op is the number of index bits of
that table. For a length or distance, the low four bits of op
is the number of extra bits to get after the code. bits is
the number of bits in this code or part of the code to drop off
of the bit buffer. val is the actual byte to output in the case
of a literal, the base length or distance, or the offset from
the current table to the next table. Each entry is four bytes. */
typedef struct {
unsigned char op; /* operation, extra bits, table bits */
unsigned char bits; /* bits in this part of the code */
unsigned short val; /* offset in table or code value */
} code;
/* op values as set by inflate_table():
00000000 - literal
0000tttt - table link, tttt != 0 is the number of table index bits
100eeeee - length or distance, eeee is the number of extra bits
01100000 - end of block
01000000 - invalid code
*/
/* Maximum size of the dynamic table. The maximum number of code structures is
1446, which is the sum of 852 for literal/length codes and 594 for distance
codes. These values were found by exhaustive searches using the program
examples/enough.c found in the zlib distribtution. The arguments to that
program are the number of symbols, the initial root table size, and the
maximum bit length of a code. "enough 286 9 15" for literal/length codes
returns returns 852, and "enough 32 6 15" for distance codes returns 594.
The initial root table size (9 or 6) is found in the fifth argument of the
inflate_table() calls in infback9.c. If the root table size is changed,
then these maximum sizes would be need to be recalculated and updated. */
#define ENOUGH_LENS 852
#define ENOUGH_DISTS 594
#define ENOUGH (ENOUGH_LENS+ENOUGH_DISTS)
/* Type of code to build for inflate_table9() */
typedef enum {
CODES,
LENS,
DISTS
} codetype;
extern int inflate_table9 OF((codetype type, unsigned short FAR *lens,
unsigned codes, code FAR * FAR *table,
unsigned FAR *bits, unsigned short FAR *work));

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1368
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#include "zfstream.h"
int main() {
// Construct a stream object with this filebuffer. Anything sent
// to this stream will go to standard out.
gzofstream os( 1, ios::out );
// This text is getting compressed and sent to stdout.
// To prove this, run 'test | zcat'.
os << "Hello, Mommy" << endl;
os << setcompressionlevel( Z_NO_COMPRESSION );
os << "hello, hello, hi, ho!" << endl;
setcompressionlevel( os, Z_DEFAULT_COMPRESSION )
<< "I'm compressing again" << endl;
os.close();
return 0;
}

329
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#include "zfstream.h"
gzfilebuf::gzfilebuf() :
file(NULL),
mode(0),
own_file_descriptor(0)
{ }
gzfilebuf::~gzfilebuf() {
sync();
if ( own_file_descriptor )
close();
}
gzfilebuf *gzfilebuf::open( const char *name,
int io_mode ) {
if ( is_open() )
return NULL;
char char_mode[10];
char *p = char_mode;
if ( io_mode & ios::in ) {
mode = ios::in;
*p++ = 'r';
} else if ( io_mode & ios::app ) {
mode = ios::app;
*p++ = 'a';
} else {
mode = ios::out;
*p++ = 'w';
}
if ( io_mode & ios::binary ) {
mode |= ios::binary;
*p++ = 'b';
}
// Hard code the compression level
if ( io_mode & (ios::out|ios::app )) {
*p++ = '9';
}
// Put the end-of-string indicator
*p = '\0';
if ( (file = gzopen(name, char_mode)) == NULL )
return NULL;
own_file_descriptor = 1;
return this;
}
gzfilebuf *gzfilebuf::attach( int file_descriptor,
int io_mode ) {
if ( is_open() )
return NULL;
char char_mode[10];
char *p = char_mode;
if ( io_mode & ios::in ) {
mode = ios::in;
*p++ = 'r';
} else if ( io_mode & ios::app ) {
mode = ios::app;
*p++ = 'a';
} else {
mode = ios::out;
*p++ = 'w';
}
if ( io_mode & ios::binary ) {
mode |= ios::binary;
*p++ = 'b';
}
// Hard code the compression level
if ( io_mode & (ios::out|ios::app )) {
*p++ = '9';
}
// Put the end-of-string indicator
*p = '\0';
if ( (file = gzdopen(file_descriptor, char_mode)) == NULL )
return NULL;
own_file_descriptor = 0;
return this;
}
gzfilebuf *gzfilebuf::close() {
if ( is_open() ) {
sync();
gzclose( file );
file = NULL;
}
return this;
}
int gzfilebuf::setcompressionlevel( int comp_level ) {
return gzsetparams(file, comp_level, -2);
}
int gzfilebuf::setcompressionstrategy( int comp_strategy ) {
return gzsetparams(file, -2, comp_strategy);
}
streampos gzfilebuf::seekoff( streamoff off, ios::seek_dir dir, int which ) {
return streampos(EOF);
}
int gzfilebuf::underflow() {
// If the file hasn't been opened for reading, error.
if ( !is_open() || !(mode & ios::in) )
return EOF;
// if a buffer doesn't exists, allocate one.
if ( !base() ) {
if ( (allocate()) == EOF )
return EOF;
setp(0,0);
} else {
if ( in_avail() )
return (unsigned char) *gptr();
if ( out_waiting() ) {
if ( flushbuf() == EOF )
return EOF;
}
}
// Attempt to fill the buffer.
int result = fillbuf();
if ( result == EOF ) {
// disable get area
setg(0,0,0);
return EOF;
}
return (unsigned char) *gptr();
}
int gzfilebuf::overflow( int c ) {
if ( !is_open() || !(mode & ios::out) )
return EOF;
if ( !base() ) {
if ( allocate() == EOF )
return EOF;
setg(0,0,0);
} else {
if (in_avail()) {
return EOF;
}
if (out_waiting()) {
if (flushbuf() == EOF)
return EOF;
}
}
int bl = blen();
setp( base(), base() + bl);
if ( c != EOF ) {
*pptr() = c;
pbump(1);
}
return 0;
}
int gzfilebuf::sync() {
if ( !is_open() )
return EOF;
if ( out_waiting() )
return flushbuf();
return 0;
}
int gzfilebuf::flushbuf() {
int n;
char *q;
q = pbase();
n = pptr() - q;
if ( gzwrite( file, q, n) < n )
return EOF;
setp(0,0);
return 0;
}
int gzfilebuf::fillbuf() {
int required;
char *p;
p = base();
required = blen();
int t = gzread( file, p, required );
if ( t <= 0) return EOF;
setg( base(), base(), base()+t);
return t;
}
gzfilestream_common::gzfilestream_common() :
ios( gzfilestream_common::rdbuf() )
{ }
gzfilestream_common::~gzfilestream_common()
{ }
void gzfilestream_common::attach( int fd, int io_mode ) {
if ( !buffer.attach( fd, io_mode) )
clear( ios::failbit | ios::badbit );
else
clear();
}
void gzfilestream_common::open( const char *name, int io_mode ) {
if ( !buffer.open( name, io_mode ) )
clear( ios::failbit | ios::badbit );
else
clear();
}
void gzfilestream_common::close() {
if ( !buffer.close() )
clear( ios::failbit | ios::badbit );
}
gzfilebuf *gzfilestream_common::rdbuf()
{
return &buffer;
}
gzifstream::gzifstream() :
ios( gzfilestream_common::rdbuf() )
{
clear( ios::badbit );
}
gzifstream::gzifstream( const char *name, int io_mode ) :
ios( gzfilestream_common::rdbuf() )
{
gzfilestream_common::open( name, io_mode );
}
gzifstream::gzifstream( int fd, int io_mode ) :
ios( gzfilestream_common::rdbuf() )
{
gzfilestream_common::attach( fd, io_mode );
}
gzifstream::~gzifstream() { }
gzofstream::gzofstream() :
ios( gzfilestream_common::rdbuf() )
{
clear( ios::badbit );
}
gzofstream::gzofstream( const char *name, int io_mode ) :
ios( gzfilestream_common::rdbuf() )
{
gzfilestream_common::open( name, io_mode );
}
gzofstream::gzofstream( int fd, int io_mode ) :
ios( gzfilestream_common::rdbuf() )
{
gzfilestream_common::attach( fd, io_mode );
}
gzofstream::~gzofstream() { }

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#ifndef zfstream_h
#define zfstream_h
#include <fstream.h>
#include "zlib.h"
class gzfilebuf : public streambuf {
public:
gzfilebuf( );
virtual ~gzfilebuf();
gzfilebuf *open( const char *name, int io_mode );
gzfilebuf *attach( int file_descriptor, int io_mode );
gzfilebuf *close();
int setcompressionlevel( int comp_level );
int setcompressionstrategy( int comp_strategy );
inline int is_open() const { return (file !=NULL); }
virtual streampos seekoff( streamoff, ios::seek_dir, int );
virtual int sync();
protected:
virtual int underflow();
virtual int overflow( int = EOF );
private:
gzFile file;
short mode;
short own_file_descriptor;
int flushbuf();
int fillbuf();
};
class gzfilestream_common : virtual public ios {
friend class gzifstream;
friend class gzofstream;
friend gzofstream &setcompressionlevel( gzofstream &, int );
friend gzofstream &setcompressionstrategy( gzofstream &, int );
public:
virtual ~gzfilestream_common();
void attach( int fd, int io_mode );
void open( const char *name, int io_mode );
void close();
protected:
gzfilestream_common();
private:
gzfilebuf *rdbuf();
gzfilebuf buffer;
};
class gzifstream : public gzfilestream_common, public istream {
public:
gzifstream();
gzifstream( const char *name, int io_mode = ios::in );
gzifstream( int fd, int io_mode = ios::in );
virtual ~gzifstream();
};
class gzofstream : public gzfilestream_common, public ostream {
public:
gzofstream();
gzofstream( const char *name, int io_mode = ios::out );
gzofstream( int fd, int io_mode = ios::out );
virtual ~gzofstream();
};
template<class T> class gzomanip {
friend gzofstream &operator<<(gzofstream &, const gzomanip<T> &);
public:
gzomanip(gzofstream &(*f)(gzofstream &, T), T v) : func(f), val(v) { }
private:
gzofstream &(*func)(gzofstream &, T);
T val;
};
template<class T> gzofstream &operator<<(gzofstream &s, const gzomanip<T> &m)
{
return (*m.func)(s, m.val);
}
inline gzofstream &setcompressionlevel( gzofstream &s, int l )
{
(s.rdbuf())->setcompressionlevel(l);
return s;
}
inline gzofstream &setcompressionstrategy( gzofstream &s, int l )
{
(s.rdbuf())->setcompressionstrategy(l);
return s;
}
inline gzomanip<int> setcompressionlevel(int l)
{
return gzomanip<int>(&setcompressionlevel,l);
}
inline gzomanip<int> setcompressionstrategy(int l)
{
return gzomanip<int>(&setcompressionstrategy,l);
}
#endif

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/*
*
* Copyright (c) 1997
* Christian Michelsen Research AS
* Advanced Computing
* Fantoftvegen 38, 5036 BERGEN, Norway
* http://www.cmr.no
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Christian Michelsen Research AS makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
#ifndef ZSTREAM__H
#define ZSTREAM__H
/*
* zstream.h - C++ interface to the 'zlib' general purpose compression library
* $Id: zstream.h,v 1.1 1999/05/04 19:30:27 tromey Exp $
*/
#include <strstream.h>
#include <string.h>
#include <stdio.h>
#include "zlib.h"
#if defined(_WIN32)
# include <fcntl.h>
# include <io.h>
# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
#else
# define SET_BINARY_MODE(file)
#endif
class zstringlen {
public:
zstringlen(class izstream&);
zstringlen(class ozstream&, const char*);
size_t value() const { return val.word; }
private:
struct Val { unsigned char byte; size_t word; } val;
};
// ----------------------------- izstream -----------------------------
class izstream
{
public:
izstream() : m_fp(0) {}
izstream(FILE* fp) : m_fp(0) { open(fp); }
izstream(const char* name) : m_fp(0) { open(name); }
~izstream() { close(); }
/* Opens a gzip (.gz) file for reading.
* open() can be used to read a file which is not in gzip format;
* in this case read() will directly read from the file without
* decompression. errno can be checked to distinguish two error
* cases (if errno is zero, the zlib error is Z_MEM_ERROR).
*/
void open(const char* name) {
if (m_fp) close();
m_fp = ::gzopen(name, "rb");
}
void open(FILE* fp) {
SET_BINARY_MODE(fp);
if (m_fp) close();
m_fp = ::gzdopen(fileno(fp), "rb");
}
/* Flushes all pending input if necessary, closes the compressed file
* and deallocates all the (de)compression state. The return value is
* the zlib error number (see function error() below).
*/
int close() {
int r = ::gzclose(m_fp);
m_fp = 0; return r;
}
/* Binary read the given number of bytes from the compressed file.
*/
int read(void* buf, size_t len) {
return ::gzread(m_fp, buf, len);
}
/* Returns the error message for the last error which occurred on the
* given compressed file. errnum is set to zlib error number. If an
* error occurred in the file system and not in the compression library,
* errnum is set to Z_ERRNO and the application may consult errno
* to get the exact error code.
*/
const char* error(int* errnum) {
return ::gzerror(m_fp, errnum);
}
gzFile fp() { return m_fp; }
private:
gzFile m_fp;
};
/*
* Binary read the given (array of) object(s) from the compressed file.
* If the input file was not in gzip format, read() copies the objects number
* of bytes into the buffer.
* returns the number of uncompressed bytes actually read
* (0 for end of file, -1 for error).
*/
template <class T, class Items>
inline int read(izstream& zs, T* x, Items items) {
return ::gzread(zs.fp(), x, items*sizeof(T));
}
/*
* Binary input with the '>' operator.
*/
template <class T>
inline izstream& operator>(izstream& zs, T& x) {
::gzread(zs.fp(), &x, sizeof(T));
return zs;
}
inline zstringlen::zstringlen(izstream& zs) {
zs > val.byte;
if (val.byte == 255) zs > val.word;
else val.word = val.byte;
}
/*
* Read length of string + the string with the '>' operator.
*/
inline izstream& operator>(izstream& zs, char* x) {
zstringlen len(zs);
::gzread(zs.fp(), x, len.value());
x[len.value()] = '\0';
return zs;
}
inline char* read_string(izstream& zs) {
zstringlen len(zs);
char* x = new char[len.value()+1];
::gzread(zs.fp(), x, len.value());
x[len.value()] = '\0';
return x;
}
// ----------------------------- ozstream -----------------------------
class ozstream
{
public:
ozstream() : m_fp(0), m_os(0) {
}
ozstream(FILE* fp, int level = Z_DEFAULT_COMPRESSION)
: m_fp(0), m_os(0) {
open(fp, level);
}
ozstream(const char* name, int level = Z_DEFAULT_COMPRESSION)
: m_fp(0), m_os(0) {
open(name, level);
}
~ozstream() {
close();
}
/* Opens a gzip (.gz) file for writing.
* The compression level parameter should be in 0..9
* errno can be checked to distinguish two error cases
* (if errno is zero, the zlib error is Z_MEM_ERROR).
*/
void open(const char* name, int level = Z_DEFAULT_COMPRESSION) {
char mode[4] = "wb\0";
if (level != Z_DEFAULT_COMPRESSION) mode[2] = '0'+level;
if (m_fp) close();
m_fp = ::gzopen(name, mode);
}
/* open from a FILE pointer.
*/
void open(FILE* fp, int level = Z_DEFAULT_COMPRESSION) {
SET_BINARY_MODE(fp);
char mode[4] = "wb\0";
if (level != Z_DEFAULT_COMPRESSION) mode[2] = '0'+level;
if (m_fp) close();
m_fp = ::gzdopen(fileno(fp), mode);
}
/* Flushes all pending output if necessary, closes the compressed file
* and deallocates all the (de)compression state. The return value is
* the zlib error number (see function error() below).
*/
int close() {
if (m_os) {
::gzwrite(m_fp, m_os->str(), m_os->pcount());
delete[] m_os->str(); delete m_os; m_os = 0;
}
int r = ::gzclose(m_fp); m_fp = 0; return r;
}
/* Binary write the given number of bytes into the compressed file.
*/
int write(const void* buf, size_t len) {
return ::gzwrite(m_fp, (voidp) buf, len);
}
/* Flushes all pending output into the compressed file. The parameter
* _flush is as in the deflate() function. The return value is the zlib
* error number (see function gzerror below). flush() returns Z_OK if
* the flush_ parameter is Z_FINISH and all output could be flushed.
* flush() should be called only when strictly necessary because it can
* degrade compression.
*/
int flush(int _flush) {
os_flush();
return ::gzflush(m_fp, _flush);
}
/* Returns the error message for the last error which occurred on the
* given compressed file. errnum is set to zlib error number. If an
* error occurred in the file system and not in the compression library,
* errnum is set to Z_ERRNO and the application may consult errno
* to get the exact error code.
*/
const char* error(int* errnum) {
return ::gzerror(m_fp, errnum);
}
gzFile fp() { return m_fp; }
ostream& os() {
if (m_os == 0) m_os = new ostrstream;
return *m_os;
}
void os_flush() {
if (m_os && m_os->pcount()>0) {
ostrstream* oss = new ostrstream;
oss->fill(m_os->fill());
oss->flags(m_os->flags());
oss->precision(m_os->precision());
oss->width(m_os->width());
::gzwrite(m_fp, m_os->str(), m_os->pcount());
delete[] m_os->str(); delete m_os; m_os = oss;
}
}
private:
gzFile m_fp;
ostrstream* m_os;
};
/*
* Binary write the given (array of) object(s) into the compressed file.
* returns the number of uncompressed bytes actually written
* (0 in case of error).
*/
template <class T, class Items>
inline int write(ozstream& zs, const T* x, Items items) {
return ::gzwrite(zs.fp(), (voidp) x, items*sizeof(T));
}
/*
* Binary output with the '<' operator.
*/
template <class T>
inline ozstream& operator<(ozstream& zs, const T& x) {
::gzwrite(zs.fp(), (voidp) &x, sizeof(T));
return zs;
}
inline zstringlen::zstringlen(ozstream& zs, const char* x) {
val.byte = 255; val.word = ::strlen(x);
if (val.word < 255) zs < (val.byte = val.word);
else zs < val;
}
/*
* Write length of string + the string with the '<' operator.
*/
inline ozstream& operator<(ozstream& zs, const char* x) {
zstringlen len(zs, x);
::gzwrite(zs.fp(), (voidp) x, len.value());
return zs;
}
#ifdef _MSC_VER
inline ozstream& operator<(ozstream& zs, char* const& x) {
return zs < (const char*) x;
}
#endif
/*
* Ascii write with the << operator;
*/
template <class T>
inline ostream& operator<<(ozstream& zs, const T& x) {
zs.os_flush();
return zs.os() << x;
}
#endif

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#include "zstream.h"
#include <math.h>
#include <stdlib.h>
#include <iomanip.h>
void main() {
char h[256] = "Hello";
char* g = "Goodbye";
ozstream out("temp.gz");
out < "This works well" < h < g;
out.close();
izstream in("temp.gz"); // read it back
char *x = read_string(in), *y = new char[256], z[256];
in > y > z;
in.close();
cout << x << endl << y << endl << z << endl;
out.open("temp.gz"); // try ascii output; zcat temp.gz to see the results
out << setw(50) << setfill('#') << setprecision(20) << x << endl << y << endl << z << endl;
out << z << endl << y << endl << x << endl;
out << 1.1234567890123456789 << endl;
delete[] x; delete[] y;
}

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These classes provide a C++ stream interface to the zlib library. It allows you
to do things like:
gzofstream outf("blah.gz");
outf << "These go into the gzip file " << 123 << endl;
It does this by deriving a specialized stream buffer for gzipped files, which is
the way Stroustrup would have done it. :->
The gzifstream and gzofstream classes were originally written by Kevin Ruland
and made available in the zlib contrib/iostream directory. The older version still
compiles under gcc 2.xx, but not under gcc 3.xx, which sparked the development of
this version.
The new classes are as standard-compliant as possible, closely following the
approach of the standard library's fstream classes. It compiles under gcc versions
3.2 and 3.3, but not under gcc 2.xx. This is mainly due to changes in the standard
library naming scheme. The new version of gzifstream/gzofstream/gzfilebuf differs
from the previous one in the following respects:
- added showmanyc
- added setbuf, with support for unbuffered output via setbuf(0,0)
- a few bug fixes of stream behavior
- gzipped output file opened with default compression level instead of maximum level
- setcompressionlevel()/strategy() members replaced by single setcompression()
The code is provided "as is", with the permission to use, copy, modify, distribute
and sell it for any purpose without fee.
Ludwig Schwardt
<schwardt@sun.ac.za>
DSP Lab
Electrical & Electronic Engineering Department
University of Stellenbosch
South Africa

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Possible upgrades to gzfilebuf:
- The ability to do putback (e.g. putbackfail)
- The ability to seek (zlib supports this, but could be slow/tricky)
- Simultaneous read/write access (does it make sense?)
- Support for ios_base::ate open mode
- Locale support?
- Check public interface to see which calls give problems
(due to dependence on library internals)
- Override operator<<(ostream&, gzfilebuf*) to allow direct copying
of stream buffer to stream ( i.e. os << is.rdbuf(); )

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/*
* Test program for gzifstream and gzofstream
*
* by Ludwig Schwardt <schwardt@sun.ac.za>
* original version by Kevin Ruland <kevin@rodin.wustl.edu>
*/
#include "zfstream.h"
#include <iostream> // for cout
int main() {
gzofstream outf;
gzifstream inf;
char buf[80];
outf.open("test1.txt.gz");
outf << "The quick brown fox sidestepped the lazy canine\n"
<< 1.3 << "\nPlan " << 9 << std::endl;
outf.close();
std::cout << "Wrote the following message to 'test1.txt.gz' (check with zcat or zless):\n"
<< "The quick brown fox sidestepped the lazy canine\n"
<< 1.3 << "\nPlan " << 9 << std::endl;
std::cout << "\nReading 'test1.txt.gz' (buffered) produces:\n";
inf.open("test1.txt.gz");
while (inf.getline(buf,80,'\n')) {
std::cout << buf << "\t(" << inf.rdbuf()->in_avail() << " chars left in buffer)\n";
}
inf.close();
outf.rdbuf()->pubsetbuf(0,0);
outf.open("test2.txt.gz");
outf << setcompression(Z_NO_COMPRESSION)
<< "The quick brown fox sidestepped the lazy canine\n"
<< 1.3 << "\nPlan " << 9 << std::endl;
outf.close();
std::cout << "\nWrote the same message to 'test2.txt.gz' in uncompressed form";
std::cout << "\nReading 'test2.txt.gz' (unbuffered) produces:\n";
inf.rdbuf()->pubsetbuf(0,0);
inf.open("test2.txt.gz");
while (inf.getline(buf,80,'\n')) {
std::cout << buf << "\t(" << inf.rdbuf()->in_avail() << " chars left in buffer)\n";
}
inf.close();
return 0;
}

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/*
* A C++ I/O streams interface to the zlib gz* functions
*
* by Ludwig Schwardt <schwardt@sun.ac.za>
* original version by Kevin Ruland <kevin@rodin.wustl.edu>
*
* This version is standard-compliant and compatible with gcc 3.x.
*/
#include "zfstream.h"
#include <cstring> // for strcpy, strcat, strlen (mode strings)
#include <cstdio> // for BUFSIZ
// Internal buffer sizes (default and "unbuffered" versions)
#define BIGBUFSIZE BUFSIZ
#define SMALLBUFSIZE 1
/*****************************************************************************/
// Default constructor
gzfilebuf::gzfilebuf()
: file(NULL), io_mode(std::ios_base::openmode(0)), own_fd(false),
buffer(NULL), buffer_size(BIGBUFSIZE), own_buffer(true)
{
// No buffers to start with
this->disable_buffer();
}
// Destructor
gzfilebuf::~gzfilebuf()
{
// Sync output buffer and close only if responsible for file
// (i.e. attached streams should be left open at this stage)
this->sync();
if (own_fd)
this->close();
// Make sure internal buffer is deallocated
this->disable_buffer();
}
// Set compression level and strategy
int
gzfilebuf::setcompression(int comp_level,
int comp_strategy)
{
return gzsetparams(file, comp_level, comp_strategy);
}
// Open gzipped file
gzfilebuf*
gzfilebuf::open(const char *name,
std::ios_base::openmode mode)
{
// Fail if file already open
if (this->is_open())
return NULL;
// Don't support simultaneous read/write access (yet)
if ((mode & std::ios_base::in) && (mode & std::ios_base::out))
return NULL;
// Build mode string for gzopen and check it [27.8.1.3.2]
char char_mode[6] = "\0\0\0\0\0";
if (!this->open_mode(mode, char_mode))
return NULL;
// Attempt to open file
if ((file = gzopen(name, char_mode)) == NULL)
return NULL;
// On success, allocate internal buffer and set flags
this->enable_buffer();
io_mode = mode;
own_fd = true;
return this;
}
// Attach to gzipped file
gzfilebuf*
gzfilebuf::attach(int fd,
std::ios_base::openmode mode)
{
// Fail if file already open
if (this->is_open())
return NULL;
// Don't support simultaneous read/write access (yet)
if ((mode & std::ios_base::in) && (mode & std::ios_base::out))
return NULL;
// Build mode string for gzdopen and check it [27.8.1.3.2]
char char_mode[6] = "\0\0\0\0\0";
if (!this->open_mode(mode, char_mode))
return NULL;
// Attempt to attach to file
if ((file = gzdopen(fd, char_mode)) == NULL)
return NULL;
// On success, allocate internal buffer and set flags
this->enable_buffer();
io_mode = mode;
own_fd = false;
return this;
}
// Close gzipped file
gzfilebuf*
gzfilebuf::close()
{
// Fail immediately if no file is open
if (!this->is_open())
return NULL;
// Assume success
gzfilebuf* retval = this;
// Attempt to sync and close gzipped file
if (this->sync() == -1)
retval = NULL;
if (gzclose(file) < 0)
retval = NULL;
// File is now gone anyway (postcondition [27.8.1.3.8])
file = NULL;
own_fd = false;
// Destroy internal buffer if it exists
this->disable_buffer();
return retval;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
// Convert int open mode to mode string
bool
gzfilebuf::open_mode(std::ios_base::openmode mode,
char* c_mode) const
{
bool testb = mode & std::ios_base::binary;
bool testi = mode & std::ios_base::in;
bool testo = mode & std::ios_base::out;
bool testt = mode & std::ios_base::trunc;
bool testa = mode & std::ios_base::app;
// Check for valid flag combinations - see [27.8.1.3.2] (Table 92)
// Original zfstream hardcoded the compression level to maximum here...
// Double the time for less than 1% size improvement seems
// excessive though - keeping it at the default level
// To change back, just append "9" to the next three mode strings
if (!testi && testo && !testt && !testa)
strcpy(c_mode, "w");
if (!testi && testo && !testt && testa)
strcpy(c_mode, "a");
if (!testi && testo && testt && !testa)
strcpy(c_mode, "w");
if (testi && !testo && !testt && !testa)
strcpy(c_mode, "r");
// No read/write mode yet
// if (testi && testo && !testt && !testa)
// strcpy(c_mode, "r+");
// if (testi && testo && testt && !testa)
// strcpy(c_mode, "w+");
// Mode string should be empty for invalid combination of flags
if (strlen(c_mode) == 0)
return false;
if (testb)
strcat(c_mode, "b");
return true;
}
// Determine number of characters in internal get buffer
std::streamsize
gzfilebuf::showmanyc()
{
// Calls to underflow will fail if file not opened for reading
if (!this->is_open() || !(io_mode & std::ios_base::in))
return -1;
// Make sure get area is in use
if (this->gptr() && (this->gptr() < this->egptr()))
return std::streamsize(this->egptr() - this->gptr());
else
return 0;
}
// Fill get area from gzipped file
gzfilebuf::int_type
gzfilebuf::underflow()
{
// If something is left in the get area by chance, return it
// (this shouldn't normally happen, as underflow is only supposed
// to be called when gptr >= egptr, but it serves as error check)
if (this->gptr() && (this->gptr() < this->egptr()))
return traits_type::to_int_type(*(this->gptr()));
// If the file hasn't been opened for reading, produce error
if (!this->is_open() || !(io_mode & std::ios_base::in))
return traits_type::eof();
// Attempt to fill internal buffer from gzipped file
// (buffer must be guaranteed to exist...)
int bytes_read = gzread(file, buffer, buffer_size);
// Indicates error or EOF
if (bytes_read <= 0)
{
// Reset get area
this->setg(buffer, buffer, buffer);
return traits_type::eof();
}
// Make all bytes read from file available as get area
this->setg(buffer, buffer, buffer + bytes_read);
// Return next character in get area
return traits_type::to_int_type(*(this->gptr()));
}
// Write put area to gzipped file
gzfilebuf::int_type
gzfilebuf::overflow(int_type c)
{
// Determine whether put area is in use
if (this->pbase())
{
// Double-check pointer range
if (this->pptr() > this->epptr() || this->pptr() < this->pbase())
return traits_type::eof();
// Add extra character to buffer if not EOF
if (!traits_type::eq_int_type(c, traits_type::eof()))
{
*(this->pptr()) = traits_type::to_char_type(c);
this->pbump(1);
}
// Number of characters to write to file
int bytes_to_write = this->pptr() - this->pbase();
// Overflow doesn't fail if nothing is to be written
if (bytes_to_write > 0)
{
// If the file hasn't been opened for writing, produce error
if (!this->is_open() || !(io_mode & std::ios_base::out))
return traits_type::eof();
// If gzipped file won't accept all bytes written to it, fail
if (gzwrite(file, this->pbase(), bytes_to_write) != bytes_to_write)
return traits_type::eof();
// Reset next pointer to point to pbase on success
this->pbump(-bytes_to_write);
}
}
// Write extra character to file if not EOF
else if (!traits_type::eq_int_type(c, traits_type::eof()))
{
// If the file hasn't been opened for writing, produce error
if (!this->is_open() || !(io_mode & std::ios_base::out))
return traits_type::eof();
// Impromptu char buffer (allows "unbuffered" output)
char_type last_char = traits_type::to_char_type(c);
// If gzipped file won't accept this character, fail
if (gzwrite(file, &last_char, 1) != 1)
return traits_type::eof();
}
// If you got here, you have succeeded (even if c was EOF)
// The return value should therefore be non-EOF
if (traits_type::eq_int_type(c, traits_type::eof()))
return traits_type::not_eof(c);
else
return c;
}
// Assign new buffer
std::streambuf*
gzfilebuf::setbuf(char_type* p,
std::streamsize n)
{
// First make sure stuff is sync'ed, for safety
if (this->sync() == -1)
return NULL;
// If buffering is turned off on purpose via setbuf(0,0), still allocate one...
// "Unbuffered" only really refers to put [27.8.1.4.10], while get needs at
// least a buffer of size 1 (very inefficient though, therefore make it bigger?)
// This follows from [27.5.2.4.3]/12 (gptr needs to point at something, it seems)
if (!p || !n)
{
// Replace existing buffer (if any) with small internal buffer
this->disable_buffer();
buffer = NULL;
buffer_size = 0;
own_buffer = true;
this->enable_buffer();
}
else
{
// Replace existing buffer (if any) with external buffer
this->disable_buffer();
buffer = p;
buffer_size = n;
own_buffer = false;
this->enable_buffer();
}
return this;
}
// Write put area to gzipped file (i.e. ensures that put area is empty)
int
gzfilebuf::sync()
{
return traits_type::eq_int_type(this->overflow(), traits_type::eof()) ? -1 : 0;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
// Allocate internal buffer
void
gzfilebuf::enable_buffer()
{
// If internal buffer required, allocate one
if (own_buffer && !buffer)
{
// Check for buffered vs. "unbuffered"
if (buffer_size > 0)
{
// Allocate internal buffer
buffer = new char_type[buffer_size];
// Get area starts empty and will be expanded by underflow as need arises
this->setg(buffer, buffer, buffer);
// Setup entire internal buffer as put area.
// The one-past-end pointer actually points to the last element of the buffer,
// so that overflow(c) can safely add the extra character c to the sequence.
// These pointers remain in place for the duration of the buffer
this->setp(buffer, buffer + buffer_size - 1);
}
else
{
// Even in "unbuffered" case, (small?) get buffer is still required
buffer_size = SMALLBUFSIZE;
buffer = new char_type[buffer_size];
this->setg(buffer, buffer, buffer);
// "Unbuffered" means no put buffer
this->setp(0, 0);
}
}
else
{
// If buffer already allocated, reset buffer pointers just to make sure no
// stale chars are lying around
this->setg(buffer, buffer, buffer);
this->setp(buffer, buffer + buffer_size - 1);
}
}
// Destroy internal buffer
void
gzfilebuf::disable_buffer()
{
// If internal buffer exists, deallocate it
if (own_buffer && buffer)
{
// Preserve unbuffered status by zeroing size
if (!this->pbase())
buffer_size = 0;
delete[] buffer;
buffer = NULL;
this->setg(0, 0, 0);
this->setp(0, 0);
}
else
{
// Reset buffer pointers to initial state if external buffer exists
this->setg(buffer, buffer, buffer);
if (buffer)
this->setp(buffer, buffer + buffer_size - 1);
else
this->setp(0, 0);
}
}
/*****************************************************************************/
// Default constructor initializes stream buffer
gzifstream::gzifstream()
: std::istream(NULL), sb()
{ this->init(&sb); }
// Initialize stream buffer and open file
gzifstream::gzifstream(const char* name,
std::ios_base::openmode mode)
: std::istream(NULL), sb()
{
this->init(&sb);
this->open(name, mode);
}
// Initialize stream buffer and attach to file
gzifstream::gzifstream(int fd,
std::ios_base::openmode mode)
: std::istream(NULL), sb()
{
this->init(&sb);
this->attach(fd, mode);
}
// Open file and go into fail() state if unsuccessful
void
gzifstream::open(const char* name,
std::ios_base::openmode mode)
{
if (!sb.open(name, mode | std::ios_base::in))
this->setstate(std::ios_base::failbit);
else
this->clear();
}
// Attach to file and go into fail() state if unsuccessful
void
gzifstream::attach(int fd,
std::ios_base::openmode mode)
{
if (!sb.attach(fd, mode | std::ios_base::in))
this->setstate(std::ios_base::failbit);
else
this->clear();
}
// Close file
void
gzifstream::close()
{
if (!sb.close())
this->setstate(std::ios_base::failbit);
}
/*****************************************************************************/
// Default constructor initializes stream buffer
gzofstream::gzofstream()
: std::ostream(NULL), sb()
{ this->init(&sb); }
// Initialize stream buffer and open file
gzofstream::gzofstream(const char* name,
std::ios_base::openmode mode)
: std::ostream(NULL), sb()
{
this->init(&sb);
this->open(name, mode);
}
// Initialize stream buffer and attach to file
gzofstream::gzofstream(int fd,
std::ios_base::openmode mode)
: std::ostream(NULL), sb()
{
this->init(&sb);
this->attach(fd, mode);
}
// Open file and go into fail() state if unsuccessful
void
gzofstream::open(const char* name,
std::ios_base::openmode mode)
{
if (!sb.open(name, mode | std::ios_base::out))
this->setstate(std::ios_base::failbit);
else
this->clear();
}
// Attach to file and go into fail() state if unsuccessful
void
gzofstream::attach(int fd,
std::ios_base::openmode mode)
{
if (!sb.attach(fd, mode | std::ios_base::out))
this->setstate(std::ios_base::failbit);
else
this->clear();
}
// Close file
void
gzofstream::close()
{
if (!sb.close())
this->setstate(std::ios_base::failbit);
}

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/*
* A C++ I/O streams interface to the zlib gz* functions
*
* by Ludwig Schwardt <schwardt@sun.ac.za>
* original version by Kevin Ruland <kevin@rodin.wustl.edu>
*
* This version is standard-compliant and compatible with gcc 3.x.
*/
#ifndef ZFSTREAM_H
#define ZFSTREAM_H
#include <istream> // not iostream, since we don't need cin/cout
#include <ostream>
#include "zlib.h"
/*****************************************************************************/
/**
* @brief Gzipped file stream buffer class.
*
* This class implements basic_filebuf for gzipped files. It doesn't yet support
* seeking (allowed by zlib but slow/limited), putback and read/write access
* (tricky). Otherwise, it attempts to be a drop-in replacement for the standard
* file streambuf.
*/
class gzfilebuf : public std::streambuf
{
public:
// Default constructor.
gzfilebuf();
// Destructor.
virtual
~gzfilebuf();
/**
* @brief Set compression level and strategy on the fly.
* @param comp_level Compression level (see zlib.h for allowed values)
* @param comp_strategy Compression strategy (see zlib.h for allowed values)
* @return Z_OK on success, Z_STREAM_ERROR otherwise.
*
* Unfortunately, these parameters cannot be modified separately, as the
* previous zfstream version assumed. Since the strategy is seldom changed,
* it can default and setcompression(level) then becomes like the old
* setcompressionlevel(level).
*/
int
setcompression(int comp_level,
int comp_strategy = Z_DEFAULT_STRATEGY);
/**
* @brief Check if file is open.
* @return True if file is open.
*/
bool
is_open() const { return (file != NULL); }
/**
* @brief Open gzipped file.
* @param name File name.
* @param mode Open mode flags.
* @return @c this on success, NULL on failure.
*/
gzfilebuf*
open(const char* name,
std::ios_base::openmode mode);
/**
* @brief Attach to already open gzipped file.
* @param fd File descriptor.
* @param mode Open mode flags.
* @return @c this on success, NULL on failure.
*/
gzfilebuf*
attach(int fd,
std::ios_base::openmode mode);
/**
* @brief Close gzipped file.
* @return @c this on success, NULL on failure.
*/
gzfilebuf*
close();
protected:
/**
* @brief Convert ios open mode int to mode string used by zlib.
* @return True if valid mode flag combination.
*/
bool
open_mode(std::ios_base::openmode mode,
char* c_mode) const;
/**
* @brief Number of characters available in stream buffer.
* @return Number of characters.
*
* This indicates number of characters in get area of stream buffer.
* These characters can be read without accessing the gzipped file.
*/
virtual std::streamsize
showmanyc();
/**
* @brief Fill get area from gzipped file.
* @return First character in get area on success, EOF on error.
*
* This actually reads characters from gzipped file to stream
* buffer. Always buffered.
*/
virtual int_type
underflow();
/**
* @brief Write put area to gzipped file.
* @param c Extra character to add to buffer contents.
* @return Non-EOF on success, EOF on error.
*
* This actually writes characters in stream buffer to
* gzipped file. With unbuffered output this is done one
* character at a time.
*/
virtual int_type
overflow(int_type c = traits_type::eof());
/**
* @brief Installs external stream buffer.
* @param p Pointer to char buffer.
* @param n Size of external buffer.
* @return @c this on success, NULL on failure.
*
* Call setbuf(0,0) to enable unbuffered output.
*/
virtual std::streambuf*
setbuf(char_type* p,
std::streamsize n);
/**
* @brief Flush stream buffer to file.
* @return 0 on success, -1 on error.
*
* This calls underflow(EOF) to do the job.
*/
virtual int
sync();
//
// Some future enhancements
//
// virtual int_type uflow();
// virtual int_type pbackfail(int_type c = traits_type::eof());
// virtual pos_type
// seekoff(off_type off,
// std::ios_base::seekdir way,
// std::ios_base::openmode mode = std::ios_base::in|std::ios_base::out);
// virtual pos_type
// seekpos(pos_type sp,
// std::ios_base::openmode mode = std::ios_base::in|std::ios_base::out);
private:
/**
* @brief Allocate internal buffer.
*
* This function is safe to call multiple times. It will ensure
* that a proper internal buffer exists if it is required. If the
* buffer already exists or is external, the buffer pointers will be
* reset to their original state.
*/
void
enable_buffer();
/**
* @brief Destroy internal buffer.
*
* This function is safe to call multiple times. It will ensure
* that the internal buffer is deallocated if it exists. In any
* case, it will also reset the buffer pointers.
*/
void
disable_buffer();
/**
* Underlying file pointer.
*/
gzFile file;
/**
* Mode in which file was opened.
*/
std::ios_base::openmode io_mode;
/**
* @brief True if this object owns file descriptor.
*
* This makes the class responsible for closing the file
* upon destruction.
*/
bool own_fd;
/**
* @brief Stream buffer.
*
* For simplicity this remains allocated on the free store for the
* entire life span of the gzfilebuf object, unless replaced by setbuf.
*/
char_type* buffer;
/**
* @brief Stream buffer size.
*
* Defaults to system default buffer size (typically 8192 bytes).
* Modified by setbuf.
*/
std::streamsize buffer_size;
/**
* @brief True if this object owns stream buffer.
*
* This makes the class responsible for deleting the buffer
* upon destruction.
*/
bool own_buffer;
};
/*****************************************************************************/
/**
* @brief Gzipped file input stream class.
*
* This class implements ifstream for gzipped files. Seeking and putback
* is not supported yet.
*/
class gzifstream : public std::istream
{
public:
// Default constructor
gzifstream();
/**
* @brief Construct stream on gzipped file to be opened.
* @param name File name.
* @param mode Open mode flags (forced to contain ios::in).
*/
explicit
gzifstream(const char* name,
std::ios_base::openmode mode = std::ios_base::in);
/**
* @brief Construct stream on already open gzipped file.
* @param fd File descriptor.
* @param mode Open mode flags (forced to contain ios::in).
*/
explicit
gzifstream(int fd,
std::ios_base::openmode mode = std::ios_base::in);
/**
* Obtain underlying stream buffer.
*/
gzfilebuf*
rdbuf() const
{ return const_cast<gzfilebuf*>(&sb); }
/**
* @brief Check if file is open.
* @return True if file is open.
*/
bool
is_open() { return sb.is_open(); }
/**
* @brief Open gzipped file.
* @param name File name.
* @param mode Open mode flags (forced to contain ios::in).
*
* Stream will be in state good() if file opens successfully;
* otherwise in state fail(). This differs from the behavior of
* ifstream, which never sets the state to good() and therefore
* won't allow you to reuse the stream for a second file unless
* you manually clear() the state. The choice is a matter of
* convenience.
*/
void
open(const char* name,
std::ios_base::openmode mode = std::ios_base::in);
/**
* @brief Attach to already open gzipped file.
* @param fd File descriptor.
* @param mode Open mode flags (forced to contain ios::in).
*
* Stream will be in state good() if attach succeeded; otherwise
* in state fail().
*/
void
attach(int fd,
std::ios_base::openmode mode = std::ios_base::in);
/**
* @brief Close gzipped file.
*
* Stream will be in state fail() if close failed.
*/
void
close();
private:
/**
* Underlying stream buffer.
*/
gzfilebuf sb;
};
/*****************************************************************************/
/**
* @brief Gzipped file output stream class.
*
* This class implements ofstream for gzipped files. Seeking and putback
* is not supported yet.
*/
class gzofstream : public std::ostream
{
public:
// Default constructor
gzofstream();
/**
* @brief Construct stream on gzipped file to be opened.
* @param name File name.
* @param mode Open mode flags (forced to contain ios::out).
*/
explicit
gzofstream(const char* name,
std::ios_base::openmode mode = std::ios_base::out);
/**
* @brief Construct stream on already open gzipped file.
* @param fd File descriptor.
* @param mode Open mode flags (forced to contain ios::out).
*/
explicit
gzofstream(int fd,
std::ios_base::openmode mode = std::ios_base::out);
/**
* Obtain underlying stream buffer.
*/
gzfilebuf*
rdbuf() const
{ return const_cast<gzfilebuf*>(&sb); }
/**
* @brief Check if file is open.
* @return True if file is open.
*/
bool
is_open() { return sb.is_open(); }
/**
* @brief Open gzipped file.
* @param name File name.
* @param mode Open mode flags (forced to contain ios::out).
*
* Stream will be in state good() if file opens successfully;
* otherwise in state fail(). This differs from the behavior of
* ofstream, which never sets the state to good() and therefore
* won't allow you to reuse the stream for a second file unless
* you manually clear() the state. The choice is a matter of
* convenience.
*/
void
open(const char* name,
std::ios_base::openmode mode = std::ios_base::out);
/**
* @brief Attach to already open gzipped file.
* @param fd File descriptor.
* @param mode Open mode flags (forced to contain ios::out).
*
* Stream will be in state good() if attach succeeded; otherwise
* in state fail().
*/
void
attach(int fd,
std::ios_base::openmode mode = std::ios_base::out);
/**
* @brief Close gzipped file.
*
* Stream will be in state fail() if close failed.
*/
void
close();
private:
/**
* Underlying stream buffer.
*/
gzfilebuf sb;
};
/*****************************************************************************/
/**
* @brief Gzipped file output stream manipulator class.
*
* This class defines a two-argument manipulator for gzofstream. It is used
* as base for the setcompression(int,int) manipulator.
*/
template<typename T1, typename T2>
class gzomanip2
{
public:
// Allows insertor to peek at internals
template <typename Ta, typename Tb>
friend gzofstream&
operator<<(gzofstream&,
const gzomanip2<Ta,Tb>&);
// Constructor
gzomanip2(gzofstream& (*f)(gzofstream&, T1, T2),
T1 v1,
T2 v2);
private:
// Underlying manipulator function
gzofstream&
(*func)(gzofstream&, T1, T2);
// Arguments for manipulator function
T1 val1;
T2 val2;
};
/*****************************************************************************/
// Manipulator function thunks through to stream buffer
inline gzofstream&
setcompression(gzofstream &gzs, int l, int s = Z_DEFAULT_STRATEGY)
{
(gzs.rdbuf())->setcompression(l, s);
return gzs;
}
// Manipulator constructor stores arguments
template<typename T1, typename T2>
inline
gzomanip2<T1,T2>::gzomanip2(gzofstream &(*f)(gzofstream &, T1, T2),
T1 v1,
T2 v2)
: func(f), val1(v1), val2(v2)
{ }
// Insertor applies underlying manipulator function to stream
template<typename T1, typename T2>
inline gzofstream&
operator<<(gzofstream& s, const gzomanip2<T1,T2>& m)
{ return (*m.func)(s, m.val1, m.val2); }
// Insert this onto stream to simplify setting of compression level
inline gzomanip2<int,int>
setcompression(int l, int s = Z_DEFAULT_STRATEGY)
{ return gzomanip2<int,int>(&setcompression, l, s); }
#endif // ZFSTREAM_H

2
zlib/contrib/masmx64/bld_ml64.bat Normal file
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ml64.exe /Flinffasx64 /c /Zi inffasx64.asm
ml64.exe /Flgvmat64 /c /Zi gvmat64.asm

553
zlib/contrib/masmx64/gvmat64.asm Normal file
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;uInt longest_match_x64(
; deflate_state *s,
; IPos cur_match); /* current match */
; gvmat64.asm -- Asm portion of the optimized longest_match for 32 bits x86_64
; (AMD64 on Athlon 64, Opteron, Phenom
; and Intel EM64T on Pentium 4 with EM64T, Pentium D, Core 2 Duo, Core I5/I7)
; Copyright (C) 1995-2010 Jean-loup Gailly, Brian Raiter and Gilles Vollant.
;
; File written by Gilles Vollant, by converting to assembly the longest_match
; from Jean-loup Gailly in deflate.c of zLib and infoZip zip.
;
; and by taking inspiration on asm686 with masm, optimised assembly code
; from Brian Raiter, written 1998
;
; This software is provided 'as-is', without any express or implied
; warranty. In no event will the authors be held liable for any damages
; arising from the use of this software.
;
; Permission is granted to anyone to use this software for any purpose,
; including commercial applications, and to alter it and redistribute it
; freely, subject to the following restrictions:
;
; 1. The origin of this software must not be misrepresented; you must not
; claim that you wrote the original software. If you use this software
; in a product, an acknowledgment in the product documentation would be
; appreciated but is not required.
; 2. Altered source versions must be plainly marked as such, and must not be
; misrepresented as being the original software
; 3. This notice may not be removed or altered from any source distribution.
;
;
;
; http://www.zlib.net
; http://www.winimage.com/zLibDll
; http://www.muppetlabs.com/~breadbox/software/assembly.html
;
; to compile this file for infozip Zip, I use option:
; ml64.exe /Flgvmat64 /c /Zi /DINFOZIP gvmat64.asm
;
; to compile this file for zLib, I use option:
; ml64.exe /Flgvmat64 /c /Zi gvmat64.asm
; Be carrefull to adapt zlib1222add below to your version of zLib
; (if you use a version of zLib before 1.0.4 or after 1.2.2.2, change
; value of zlib1222add later)
;
; This file compile with Microsoft Macro Assembler (x64) for AMD64
;
; ml64.exe is given with Visual Studio 2005/2008/2010 and Windows WDK
;
; (you can get Windows WDK with ml64 for AMD64 from
; http://www.microsoft.com/whdc/Devtools/wdk/default.mspx for low price)
;
;uInt longest_match(s, cur_match)
; deflate_state *s;
; IPos cur_match; /* current match */
.code
longest_match PROC
;LocalVarsSize equ 88
LocalVarsSize equ 72
; register used : rax,rbx,rcx,rdx,rsi,rdi,r8,r9,r10,r11,r12
; free register : r14,r15
; register can be saved : rsp
chainlenwmask equ rsp + 8 - LocalVarsSize ; high word: current chain len
; low word: s->wmask
;window equ rsp + xx - LocalVarsSize ; local copy of s->window ; stored in r10
;windowbestlen equ rsp + xx - LocalVarsSize ; s->window + bestlen , use r10+r11
;scanstart equ rsp + xx - LocalVarsSize ; first two bytes of string ; stored in r12w
;scanend equ rsp + xx - LocalVarsSize ; last two bytes of string use ebx
;scanalign equ rsp + xx - LocalVarsSize ; dword-misalignment of string r13
;bestlen equ rsp + xx - LocalVarsSize ; size of best match so far -> r11d
;scan equ rsp + xx - LocalVarsSize ; ptr to string wanting match -> r9
IFDEF INFOZIP
ELSE
nicematch equ (rsp + 16 - LocalVarsSize) ; a good enough match size
ENDIF
save_rdi equ rsp + 24 - LocalVarsSize
save_rsi equ rsp + 32 - LocalVarsSize
save_rbx equ rsp + 40 - LocalVarsSize
save_rbp equ rsp + 48 - LocalVarsSize
save_r12 equ rsp + 56 - LocalVarsSize
save_r13 equ rsp + 64 - LocalVarsSize
;save_r14 equ rsp + 72 - LocalVarsSize
;save_r15 equ rsp + 80 - LocalVarsSize
; summary of register usage
; scanend ebx
; scanendw bx
; chainlenwmask edx
; curmatch rsi
; curmatchd esi
; windowbestlen r8
; scanalign r9
; scanalignd r9d
; window r10
; bestlen r11
; bestlend r11d
; scanstart r12d
; scanstartw r12w
; scan r13
; nicematch r14d
; limit r15
; limitd r15d
; prev rcx
; all the +4 offsets are due to the addition of pending_buf_size (in zlib
; in the deflate_state structure since the asm code was first written
; (if you compile with zlib 1.0.4 or older, remove the +4).
; Note : these value are good with a 8 bytes boundary pack structure
MAX_MATCH equ 258
MIN_MATCH equ 3
MIN_LOOKAHEAD equ (MAX_MATCH+MIN_MATCH+1)
;;; Offsets for fields in the deflate_state structure. These numbers
;;; are calculated from the definition of deflate_state, with the
;;; assumption that the compiler will dword-align the fields. (Thus,
;;; changing the definition of deflate_state could easily cause this
;;; program to crash horribly, without so much as a warning at
;;; compile time. Sigh.)
; all the +zlib1222add offsets are due to the addition of fields
; in zlib in the deflate_state structure since the asm code was first written
; (if you compile with zlib 1.0.4 or older, use "zlib1222add equ (-4)").
; (if you compile with zlib between 1.0.5 and 1.2.2.1, use "zlib1222add equ 0").
; if you compile with zlib 1.2.2.2 or later , use "zlib1222add equ 8").
IFDEF INFOZIP
_DATA SEGMENT
COMM window_size:DWORD
; WMask ; 7fff
COMM window:BYTE:010040H
COMM prev:WORD:08000H
; MatchLen : unused
; PrevMatch : unused
COMM strstart:DWORD
COMM match_start:DWORD
; Lookahead : ignore
COMM prev_length:DWORD ; PrevLen
COMM max_chain_length:DWORD
COMM good_match:DWORD
COMM nice_match:DWORD
prev_ad equ OFFSET prev
window_ad equ OFFSET window
nicematch equ nice_match
_DATA ENDS
WMask equ 07fffh
ELSE
IFNDEF zlib1222add
zlib1222add equ 8
ENDIF
dsWSize equ 56+zlib1222add+(zlib1222add/2)
dsWMask equ 64+zlib1222add+(zlib1222add/2)
dsWindow equ 72+zlib1222add
dsPrev equ 88+zlib1222add
dsMatchLen equ 128+zlib1222add
dsPrevMatch equ 132+zlib1222add
dsStrStart equ 140+zlib1222add
dsMatchStart equ 144+zlib1222add
dsLookahead equ 148+zlib1222add
dsPrevLen equ 152+zlib1222add
dsMaxChainLen equ 156+zlib1222add
dsGoodMatch equ 172+zlib1222add
dsNiceMatch equ 176+zlib1222add
window_size equ [ rcx + dsWSize]
WMask equ [ rcx + dsWMask]
window_ad equ [ rcx + dsWindow]
prev_ad equ [ rcx + dsPrev]
strstart equ [ rcx + dsStrStart]
match_start equ [ rcx + dsMatchStart]
Lookahead equ [ rcx + dsLookahead] ; 0ffffffffh on infozip
prev_length equ [ rcx + dsPrevLen]
max_chain_length equ [ rcx + dsMaxChainLen]
good_match equ [ rcx + dsGoodMatch]
nice_match equ [ rcx + dsNiceMatch]
ENDIF
; parameter 1 in r8(deflate state s), param 2 in rdx (cur match)
; see http://weblogs.asp.net/oldnewthing/archive/2004/01/14/58579.aspx and
; http://msdn.microsoft.com/library/en-us/kmarch/hh/kmarch/64bitAMD_8e951dd2-ee77-4728-8702-55ce4b5dd24a.xml.asp
;
; All registers must be preserved across the call, except for
; rax, rcx, rdx, r8, r9, r10, and r11, which are scratch.
;;; Save registers that the compiler may be using, and adjust esp to
;;; make room for our stack frame.
;;; Retrieve the function arguments. r8d will hold cur_match
;;; throughout the entire function. edx will hold the pointer to the
;;; deflate_state structure during the function's setup (before
;;; entering the main loop.
; parameter 1 in rcx (deflate_state* s), param 2 in edx -> r8 (cur match)
; this clear high 32 bits of r8, which can be garbage in both r8 and rdx
mov [save_rdi],rdi
mov [save_rsi],rsi
mov [save_rbx],rbx
mov [save_rbp],rbp
IFDEF INFOZIP
mov r8d,ecx
ELSE
mov r8d,edx
ENDIF
mov [save_r12],r12
mov [save_r13],r13
; mov [save_r14],r14
; mov [save_r15],r15
;;; uInt wmask = s->w_mask;
;;; unsigned chain_length = s->max_chain_length;
;;; if (s->prev_length >= s->good_match) {
;;; chain_length >>= 2;
;;; }
mov edi, prev_length
mov esi, good_match
mov eax, WMask
mov ebx, max_chain_length
cmp edi, esi
jl LastMatchGood
shr ebx, 2
LastMatchGood:
;;; chainlen is decremented once beforehand so that the function can
;;; use the sign flag instead of the zero flag for the exit test.
;;; It is then shifted into the high word, to make room for the wmask
;;; value, which it will always accompany.
dec ebx
shl ebx, 16
or ebx, eax
;;; on zlib only
;;; if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
IFDEF INFOZIP
mov [chainlenwmask], ebx
; on infozip nice_match = [nice_match]
ELSE
mov eax, nice_match
mov [chainlenwmask], ebx
mov r10d, Lookahead
cmp r10d, eax
cmovnl r10d, eax
mov [nicematch],r10d
ENDIF
;;; register Bytef *scan = s->window + s->strstart;
mov r10, window_ad
mov ebp, strstart
lea r13, [r10 + rbp]
;;; Determine how many bytes the scan ptr is off from being
;;; dword-aligned.
mov r9,r13
neg r13
and r13,3
;;; IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
;;; s->strstart - (IPos)MAX_DIST(s) : NIL;
IFDEF INFOZIP
mov eax,07efah ; MAX_DIST = (WSIZE-MIN_LOOKAHEAD) (0x8000-(3+8+1))
ELSE
mov eax, window_size
sub eax, MIN_LOOKAHEAD
ENDIF
xor edi,edi
sub ebp, eax
mov r11d, prev_length
cmovng ebp,edi
;;; int best_len = s->prev_length;
;;; Store the sum of s->window + best_len in esi locally, and in esi.
lea rsi,[r10+r11]
;;; register ush scan_start = *(ushf*)scan;
;;; register ush scan_end = *(ushf*)(scan+best_len-1);
;;; Posf *prev = s->prev;
movzx r12d,word ptr [r9]
movzx ebx, word ptr [r9 + r11 - 1]
mov rdi, prev_ad
;;; Jump into the main loop.
mov edx, [chainlenwmask]
cmp bx,word ptr [rsi + r8 - 1]
jz LookupLoopIsZero
LookupLoop1:
and r8d, edx
movzx r8d, word ptr [rdi + r8*2]
cmp r8d, ebp
jbe LeaveNow
sub edx, 00010000h
js LeaveNow
LoopEntry1:
cmp bx,word ptr [rsi + r8 - 1]
jz LookupLoopIsZero
LookupLoop2:
and r8d, edx
movzx r8d, word ptr [rdi + r8*2]
cmp r8d, ebp
jbe LeaveNow
sub edx, 00010000h
js LeaveNow
LoopEntry2:
cmp bx,word ptr [rsi + r8 - 1]
jz LookupLoopIsZero
LookupLoop4:
and r8d, edx
movzx r8d, word ptr [rdi + r8*2]
cmp r8d, ebp
jbe LeaveNow
sub edx, 00010000h
js LeaveNow
LoopEntry4:
cmp bx,word ptr [rsi + r8 - 1]
jnz LookupLoop1
jmp LookupLoopIsZero
;;; do {
;;; match = s->window + cur_match;
;;; if (*(ushf*)(match+best_len-1) != scan_end ||
;;; *(ushf*)match != scan_start) continue;
;;; [...]
;;; } while ((cur_match = prev[cur_match & wmask]) > limit
;;; && --chain_length != 0);
;;;
;;; Here is the inner loop of the function. The function will spend the
;;; majority of its time in this loop, and majority of that time will
;;; be spent in the first ten instructions.
;;;
;;; Within this loop:
;;; ebx = scanend
;;; r8d = curmatch
;;; edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
;;; esi = windowbestlen - i.e., (window + bestlen)
;;; edi = prev
;;; ebp = limit
LookupLoop:
and r8d, edx
movzx r8d, word ptr [rdi + r8*2]
cmp r8d, ebp
jbe LeaveNow
sub edx, 00010000h
js LeaveNow
LoopEntry:
cmp bx,word ptr [rsi + r8 - 1]
jnz LookupLoop1
LookupLoopIsZero:
cmp r12w, word ptr [r10 + r8]
jnz LookupLoop1
;;; Store the current value of chainlen.
mov [chainlenwmask], edx
;;; Point edi to the string under scrutiny, and esi to the string we
;;; are hoping to match it up with. In actuality, esi and edi are
;;; both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and edx is
;;; initialized to -(MAX_MATCH_8 - scanalign).
lea rsi,[r8+r10]
mov rdx, 0fffffffffffffef8h; -(MAX_MATCH_8)
lea rsi, [rsi + r13 + 0108h] ;MAX_MATCH_8]
lea rdi, [r9 + r13 + 0108h] ;MAX_MATCH_8]
prefetcht1 [rsi+rdx]
prefetcht1 [rdi+rdx]
;;; Test the strings for equality, 8 bytes at a time. At the end,
;;; adjust rdx so that it is offset to the exact byte that mismatched.
;;;
;;; We already know at this point that the first three bytes of the
;;; strings match each other, and they can be safely passed over before
;;; starting the compare loop. So what this code does is skip over 0-3
;;; bytes, as much as necessary in order to dword-align the edi
;;; pointer. (rsi will still be misaligned three times out of four.)
;;;
;;; It should be confessed that this loop usually does not represent
;;; much of the total running time. Replacing it with a more
;;; straightforward "rep cmpsb" would not drastically degrade
;;; performance.
LoopCmps:
mov rax, [rsi + rdx]
xor rax, [rdi + rdx]
jnz LeaveLoopCmps
mov rax, [rsi + rdx + 8]
xor rax, [rdi + rdx + 8]
jnz LeaveLoopCmps8
mov rax, [rsi + rdx + 8+8]
xor rax, [rdi + rdx + 8+8]
jnz LeaveLoopCmps16
add rdx,8+8+8
jnz short LoopCmps
jmp short LenMaximum
LeaveLoopCmps16: add rdx,8
LeaveLoopCmps8: add rdx,8
LeaveLoopCmps:
test eax, 0000FFFFh
jnz LenLower
test eax,0ffffffffh
jnz LenLower32
add rdx,4
shr rax,32
or ax,ax
jnz LenLower
LenLower32:
shr eax,16
add rdx,2
LenLower: sub al, 1
adc rdx, 0
;;; Calculate the length of the match. If it is longer than MAX_MATCH,
;;; then automatically accept it as the best possible match and leave.
lea rax, [rdi + rdx]
sub rax, r9
cmp eax, MAX_MATCH
jge LenMaximum
;;; If the length of the match is not longer than the best match we
;;; have so far, then forget it and return to the lookup loop.
;///////////////////////////////////
cmp eax, r11d
jg LongerMatch
lea rsi,[r10+r11]
mov rdi, prev_ad
mov edx, [chainlenwmask]
jmp LookupLoop
;;; s->match_start = cur_match;
;;; best_len = len;
;;; if (len >= nice_match) break;
;;; scan_end = *(ushf*)(scan+best_len-1);
LongerMatch:
mov r11d, eax
mov match_start, r8d
cmp eax, [nicematch]
jge LeaveNow
lea rsi,[r10+rax]
movzx ebx, word ptr [r9 + rax - 1]
mov rdi, prev_ad
mov edx, [chainlenwmask]
jmp LookupLoop
;;; Accept the current string, with the maximum possible length.
LenMaximum:
mov r11d,MAX_MATCH
mov match_start, r8d
;;; if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
;;; return s->lookahead;
LeaveNow:
IFDEF INFOZIP
mov eax,r11d
ELSE
mov eax, Lookahead
cmp r11d, eax
cmovng eax, r11d
ENDIF
;;; Restore the stack and return from whence we came.
mov rsi,[save_rsi]
mov rdi,[save_rdi]
mov rbx,[save_rbx]
mov rbp,[save_rbp]
mov r12,[save_r12]
mov r13,[save_r13]
; mov r14,[save_r14]
; mov r15,[save_r15]
ret 0
; please don't remove this string !
; Your can freely use gvmat64 in any free or commercial app
; but it is far better don't remove the string in the binary!
db 0dh,0ah,"asm686 with masm, optimised assembly code from Brian Raiter, written 1998, converted to amd 64 by Gilles Vollant 2005",0dh,0ah,0
longest_match ENDP
match_init PROC
ret 0
match_init ENDP
END

BIN
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zlib/contrib/masmx64/inffas8664.c Normal file
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/* inffas8664.c is a hand tuned assembler version of inffast.c - fast decoding
* version for AMD64 on Windows using Microsoft C compiler
*
* Copyright (C) 1995-2003 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*
* Copyright (C) 2003 Chris Anderson <christop@charm.net>
* Please use the copyright conditions above.
*
* 2005 - Adaptation to Microsoft C Compiler for AMD64 by Gilles Vollant
*
* inffas8664.c call function inffas8664fnc in inffasx64.asm
* inffasx64.asm is automatically convert from AMD64 portion of inffas86.c
*
* Dec-29-2003 -- I added AMD64 inflate asm support. This version is also
* slightly quicker on x86 systems because, instead of using rep movsb to copy
* data, it uses rep movsw, which moves data in 2-byte chunks instead of single
* bytes. I've tested the AMD64 code on a Fedora Core 1 + the x86_64 updates
* from http://fedora.linux.duke.edu/fc1_x86_64
* which is running on an Athlon 64 3000+ / Gigabyte GA-K8VT800M system with
* 1GB ram. The 64-bit version is about 4% faster than the 32-bit version,
* when decompressing mozilla-source-1.3.tar.gz.
*
* Mar-13-2003 -- Most of this is derived from inffast.S which is derived from
* the gcc -S output of zlib-1.2.0/inffast.c. Zlib-1.2.0 is in beta release at
* the moment. I have successfully compiled and tested this code with gcc2.96,
* gcc3.2, icc5.0, msvc6.0. It is very close to the speed of inffast.S
* compiled with gcc -DNO_MMX, but inffast.S is still faster on the P3 with MMX
* enabled. I will attempt to merge the MMX code into this version. Newer
* versions of this and inffast.S can be found at
* http://www.eetbeetee.com/zlib/ and http://www.charm.net/~christop/zlib/
*
*/
#include <stdio.h>
#include "zutil.h"
#include "inftrees.h"
#include "inflate.h"
#include "inffast.h"
/* Mark Adler's comments from inffast.c: */
/*
Decode literal, length, and distance codes and write out the resulting
literal and match bytes until either not enough input or output is
available, an end-of-block is encountered, or a data error is encountered.
When large enough input and output buffers are supplied to inflate(), for
example, a 16K input buffer and a 64K output buffer, more than 95% of the
inflate execution time is spent in this routine.
Entry assumptions:
state->mode == LEN
strm->avail_in >= 6
strm->avail_out >= 258
start >= strm->avail_out
state->bits < 8
On return, state->mode is one of:
LEN -- ran out of enough output space or enough available input
TYPE -- reached end of block code, inflate() to interpret next block
BAD -- error in block data
Notes:
- The maximum input bits used by a length/distance pair is 15 bits for the
length code, 5 bits for the length extra, 15 bits for the distance code,
and 13 bits for the distance extra. This totals 48 bits, or six bytes.
Therefore if strm->avail_in >= 6, then there is enough input to avoid
checking for available input while decoding.
- The maximum bytes that a single length/distance pair can output is 258
bytes, which is the maximum length that can be coded. inflate_fast()
requires strm->avail_out >= 258 for each loop to avoid checking for
output space.
*/
typedef struct inffast_ar {
/* 64 32 x86 x86_64 */
/* ar offset register */
/* 0 0 */ void *esp; /* esp save */
/* 8 4 */ void *ebp; /* ebp save */
/* 16 8 */ unsigned char FAR *in; /* esi rsi local strm->next_in */
/* 24 12 */ unsigned char FAR *last; /* r9 while in < last */
/* 32 16 */ unsigned char FAR *out; /* edi rdi local strm->next_out */
/* 40 20 */ unsigned char FAR *beg; /* inflate()'s init next_out */
/* 48 24 */ unsigned char FAR *end; /* r10 while out < end */
/* 56 28 */ unsigned char FAR *window;/* size of window, wsize!=0 */
/* 64 32 */ code const FAR *lcode; /* ebp rbp local strm->lencode */
/* 72 36 */ code const FAR *dcode; /* r11 local strm->distcode */
/* 80 40 */ size_t /*unsigned long */hold; /* edx rdx local strm->hold */
/* 88 44 */ unsigned bits; /* ebx rbx local strm->bits */
/* 92 48 */ unsigned wsize; /* window size */
/* 96 52 */ unsigned write; /* window write index */
/*100 56 */ unsigned lmask; /* r12 mask for lcode */
/*104 60 */ unsigned dmask; /* r13 mask for dcode */
/*108 64 */ unsigned len; /* r14 match length */
/*112 68 */ unsigned dist; /* r15 match distance */
/*116 72 */ unsigned status; /* set when state chng*/
} type_ar;
#ifdef ASMINF
void inflate_fast(strm, start)
z_streamp strm;
unsigned start; /* inflate()'s starting value for strm->avail_out */
{
struct inflate_state FAR *state;
type_ar ar;
void inffas8664fnc(struct inffast_ar * par);
#if (defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 )) || (defined(_MSC_VER) && defined(_M_AMD64))
#define PAD_AVAIL_IN 6
#define PAD_AVAIL_OUT 258
#else
#define PAD_AVAIL_IN 5
#define PAD_AVAIL_OUT 257
#endif
/* copy state to local variables */
state = (struct inflate_state FAR *)strm->state;
ar.in = strm->next_in;
ar.last = ar.in + (strm->avail_in - PAD_AVAIL_IN);
ar.out = strm->next_out;
ar.beg = ar.out - (start - strm->avail_out);
ar.end = ar.out + (strm->avail_out - PAD_AVAIL_OUT);
ar.wsize = state->wsize;
ar.write = state->wnext;
ar.window = state->window;
ar.hold = state->hold;
ar.bits = state->bits;
ar.lcode = state->lencode;
ar.dcode = state->distcode;
ar.lmask = (1U << state->lenbits) - 1;
ar.dmask = (1U << state->distbits) - 1;
/* decode literals and length/distances until end-of-block or not enough
input data or output space */
/* align in on 1/2 hold size boundary */
while (((size_t)(void *)ar.in & (sizeof(ar.hold) / 2 - 1)) != 0) {
ar.hold += (unsigned long)*ar.in++ << ar.bits;
ar.bits += 8;
}
inffas8664fnc(&ar);
if (ar.status > 1) {
if (ar.status == 2)
strm->msg = "invalid literal/length code";
else if (ar.status == 3)
strm->msg = "invalid distance code";
else
strm->msg = "invalid distance too far back";
state->mode = BAD;
}
else if ( ar.status == 1 ) {
state->mode = TYPE;
}
/* return unused bytes (on entry, bits < 8, so in won't go too far back) */
ar.len = ar.bits >> 3;
ar.in -= ar.len;
ar.bits -= ar.len << 3;
ar.hold &= (1U << ar.bits) - 1;
/* update state and return */
strm->next_in = ar.in;
strm->next_out = ar.out;
strm->avail_in = (unsigned)(ar.in < ar.last ?
PAD_AVAIL_IN + (ar.last - ar.in) :
PAD_AVAIL_IN - (ar.in - ar.last));
strm->avail_out = (unsigned)(ar.out < ar.end ?
PAD_AVAIL_OUT + (ar.end - ar.out) :
PAD_AVAIL_OUT - (ar.out - ar.end));
state->hold = (unsigned long)ar.hold;
state->bits = ar.bits;
return;
}
#endif

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; inffasx64.asm is a hand tuned assembler version of inffast.c - fast decoding
; version for AMD64 on Windows using Microsoft C compiler
;
; inffasx64.asm is automatically convert from AMD64 portion of inffas86.c
; inffasx64.asm is called by inffas8664.c, which contain more info.
; to compile this file, I use option
; ml64.exe /Flinffasx64 /c /Zi inffasx64.asm
; with Microsoft Macro Assembler (x64) for AMD64
;
; This file compile with Microsoft Macro Assembler (x64) for AMD64
;
; ml64.exe is given with Visual Studio 2005/2008/2010 and Windows WDK
;
; (you can get Windows WDK with ml64 for AMD64 from
; http://www.microsoft.com/whdc/Devtools/wdk/default.mspx for low price)
;
.code
inffas8664fnc PROC
; see http://weblogs.asp.net/oldnewthing/archive/2004/01/14/58579.aspx and
; http://msdn.microsoft.com/library/en-us/kmarch/hh/kmarch/64bitAMD_8e951dd2-ee77-4728-8702-55ce4b5dd24a.xml.asp
;
; All registers must be preserved across the call, except for
; rax, rcx, rdx, r8, r-9, r10, and r11, which are scratch.
mov [rsp-8],rsi
mov [rsp-16],rdi
mov [rsp-24],r12
mov [rsp-32],r13
mov [rsp-40],r14
mov [rsp-48],r15
mov [rsp-56],rbx
mov rax,rcx
mov [rax+8], rbp ; /* save regs rbp and rsp */
mov [rax], rsp
mov rsp, rax ; /* make rsp point to &ar */
mov rsi, [rsp+16] ; /* rsi = in */
mov rdi, [rsp+32] ; /* rdi = out */
mov r9, [rsp+24] ; /* r9 = last */
mov r10, [rsp+48] ; /* r10 = end */
mov rbp, [rsp+64] ; /* rbp = lcode */
mov r11, [rsp+72] ; /* r11 = dcode */
mov rdx, [rsp+80] ; /* rdx = hold */
mov ebx, [rsp+88] ; /* ebx = bits */
mov r12d, [rsp+100] ; /* r12d = lmask */
mov r13d, [rsp+104] ; /* r13d = dmask */
; /* r14d = len */
; /* r15d = dist */
cld
cmp r10, rdi
je L_one_time ; /* if only one decode left */
cmp r9, rsi
jne L_do_loop
L_one_time:
mov r8, r12 ; /* r8 = lmask */
cmp bl, 32
ja L_get_length_code_one_time
lodsd ; /* eax = *(uint *)in++ */
mov cl, bl ; /* cl = bits, needs it for shifting */
add bl, 32 ; /* bits += 32 */
shl rax, cl
or rdx, rax ; /* hold |= *((uint *)in)++ << bits */
jmp L_get_length_code_one_time
ALIGN 4
L_while_test:
cmp r10, rdi
jbe L_break_loop
cmp r9, rsi
jbe L_break_loop
L_do_loop:
mov r8, r12 ; /* r8 = lmask */
cmp bl, 32
ja L_get_length_code ; /* if (32 < bits) */
lodsd ; /* eax = *(uint *)in++ */
mov cl, bl ; /* cl = bits, needs it for shifting */
add bl, 32 ; /* bits += 32 */
shl rax, cl
or rdx, rax ; /* hold |= *((uint *)in)++ << bits */
L_get_length_code:
and r8, rdx ; /* r8 &= hold */
mov eax, [rbp+r8*4] ; /* eax = lcode[hold & lmask] */
mov cl, ah ; /* cl = this.bits */
sub bl, ah ; /* bits -= this.bits */
shr rdx, cl ; /* hold >>= this.bits */
test al, al
jnz L_test_for_length_base ; /* if (op != 0) 45.7% */
mov r8, r12 ; /* r8 = lmask */
shr eax, 16 ; /* output this.val char */
stosb
L_get_length_code_one_time:
and r8, rdx ; /* r8 &= hold */
mov eax, [rbp+r8*4] ; /* eax = lcode[hold & lmask] */
L_dolen:
mov cl, ah ; /* cl = this.bits */
sub bl, ah ; /* bits -= this.bits */
shr rdx, cl ; /* hold >>= this.bits */
test al, al
jnz L_test_for_length_base ; /* if (op != 0) 45.7% */
shr eax, 16 ; /* output this.val char */
stosb
jmp L_while_test
ALIGN 4
L_test_for_length_base:
mov r14d, eax ; /* len = this */
shr r14d, 16 ; /* len = this.val */
mov cl, al
test al, 16
jz L_test_for_second_level_length ; /* if ((op & 16) == 0) 8% */
and cl, 15 ; /* op &= 15 */
jz L_decode_distance ; /* if (!op) */
L_add_bits_to_len:
sub bl, cl
xor eax, eax
inc eax
shl eax, cl
dec eax
and eax, edx ; /* eax &= hold */
shr rdx, cl
add r14d, eax ; /* len += hold & mask[op] */
L_decode_distance:
mov r8, r13 ; /* r8 = dmask */
cmp bl, 32
ja L_get_distance_code ; /* if (32 < bits) */
lodsd ; /* eax = *(uint *)in++ */
mov cl, bl ; /* cl = bits, needs it for shifting */
add bl, 32 ; /* bits += 32 */
shl rax, cl
or rdx, rax ; /* hold |= *((uint *)in)++ << bits */
L_get_distance_code:
and r8, rdx ; /* r8 &= hold */
mov eax, [r11+r8*4] ; /* eax = dcode[hold & dmask] */
L_dodist:
mov r15d, eax ; /* dist = this */
shr r15d, 16 ; /* dist = this.val */
mov cl, ah
sub bl, ah ; /* bits -= this.bits */
shr rdx, cl ; /* hold >>= this.bits */
mov cl, al ; /* cl = this.op */
test al, 16 ; /* if ((op & 16) == 0) */
jz L_test_for_second_level_dist
and cl, 15 ; /* op &= 15 */
jz L_check_dist_one
L_add_bits_to_dist:
sub bl, cl
xor eax, eax
inc eax
shl eax, cl
dec eax ; /* (1 << op) - 1 */
and eax, edx ; /* eax &= hold */
shr rdx, cl
add r15d, eax ; /* dist += hold & ((1 << op) - 1) */
L_check_window:
mov r8, rsi ; /* save in so from can use it's reg */
mov rax, rdi
sub rax, [rsp+40] ; /* nbytes = out - beg */
cmp eax, r15d
jb L_clip_window ; /* if (dist > nbytes) 4.2% */
mov ecx, r14d ; /* ecx = len */
mov rsi, rdi
sub rsi, r15 ; /* from = out - dist */
sar ecx, 1
jnc L_copy_two ; /* if len % 2 == 0 */
rep movsw
mov al, [rsi]
mov [rdi], al
inc rdi
mov rsi, r8 ; /* move in back to %rsi, toss from */
jmp L_while_test
L_copy_two:
rep movsw
mov rsi, r8 ; /* move in back to %rsi, toss from */
jmp L_while_test
ALIGN 4
L_check_dist_one:
cmp r15d, 1 ; /* if dist 1, is a memset */
jne L_check_window
cmp [rsp+40], rdi ; /* if out == beg, outside window */
je L_check_window
mov ecx, r14d ; /* ecx = len */
mov al, [rdi-1]
mov ah, al
sar ecx, 1
jnc L_set_two
mov [rdi], al
inc rdi
L_set_two:
rep stosw
jmp L_while_test
ALIGN 4
L_test_for_second_level_length:
test al, 64
jnz L_test_for_end_of_block ; /* if ((op & 64) != 0) */
xor eax, eax
inc eax
shl eax, cl
dec eax
and eax, edx ; /* eax &= hold */
add eax, r14d ; /* eax += len */
mov eax, [rbp+rax*4] ; /* eax = lcode[val+(hold&mask[op])]*/
jmp L_dolen
ALIGN 4
L_test_for_second_level_dist:
test al, 64
jnz L_invalid_distance_code ; /* if ((op & 64) != 0) */
xor eax, eax
inc eax
shl eax, cl
dec eax
and eax, edx ; /* eax &= hold */
add eax, r15d ; /* eax += dist */
mov eax, [r11+rax*4] ; /* eax = dcode[val+(hold&mask[op])]*/
jmp L_dodist
ALIGN 4
L_clip_window:
mov ecx, eax ; /* ecx = nbytes */
mov eax, [rsp+92] ; /* eax = wsize, prepare for dist cmp */
neg ecx ; /* nbytes = -nbytes */
cmp eax, r15d
jb L_invalid_distance_too_far ; /* if (dist > wsize) */
add ecx, r15d ; /* nbytes = dist - nbytes */
cmp dword ptr [rsp+96], 0
jne L_wrap_around_window ; /* if (write != 0) */
mov rsi, [rsp+56] ; /* from = window */
sub eax, ecx ; /* eax -= nbytes */
add rsi, rax ; /* from += wsize - nbytes */
mov eax, r14d ; /* eax = len */
cmp r14d, ecx
jbe L_do_copy ; /* if (nbytes >= len) */
sub eax, ecx ; /* eax -= nbytes */
rep movsb
mov rsi, rdi
sub rsi, r15 ; /* from = &out[ -dist ] */
jmp L_do_copy
ALIGN 4
L_wrap_around_window:
mov eax, [rsp+96] ; /* eax = write */
cmp ecx, eax
jbe L_contiguous_in_window ; /* if (write >= nbytes) */
mov esi, [rsp+92] ; /* from = wsize */
add rsi, [rsp+56] ; /* from += window */
add rsi, rax ; /* from += write */
sub rsi, rcx ; /* from -= nbytes */
sub ecx, eax ; /* nbytes -= write */
mov eax, r14d ; /* eax = len */
cmp eax, ecx
jbe L_do_copy ; /* if (nbytes >= len) */
sub eax, ecx ; /* len -= nbytes */
rep movsb
mov rsi, [rsp+56] ; /* from = window */
mov ecx, [rsp+96] ; /* nbytes = write */
cmp eax, ecx
jbe L_do_copy ; /* if (nbytes >= len) */
sub eax, ecx ; /* len -= nbytes */
rep movsb
mov rsi, rdi
sub rsi, r15 ; /* from = out - dist */
jmp L_do_copy
ALIGN 4
L_contiguous_in_window:
mov rsi, [rsp+56] ; /* rsi = window */
add rsi, rax
sub rsi, rcx ; /* from += write - nbytes */
mov eax, r14d ; /* eax = len */
cmp eax, ecx
jbe L_do_copy ; /* if (nbytes >= len) */
sub eax, ecx ; /* len -= nbytes */
rep movsb
mov rsi, rdi
sub rsi, r15 ; /* from = out - dist */
jmp L_do_copy ; /* if (nbytes >= len) */
ALIGN 4
L_do_copy:
mov ecx, eax ; /* ecx = len */
rep movsb
mov rsi, r8 ; /* move in back to %esi, toss from */
jmp L_while_test
L_test_for_end_of_block:
test al, 32
jz L_invalid_literal_length_code
mov dword ptr [rsp+116], 1
jmp L_break_loop_with_status
L_invalid_literal_length_code:
mov dword ptr [rsp+116], 2
jmp L_break_loop_with_status
L_invalid_distance_code:
mov dword ptr [rsp+116], 3
jmp L_break_loop_with_status
L_invalid_distance_too_far:
mov dword ptr [rsp+116], 4
jmp L_break_loop_with_status
L_break_loop:
mov dword ptr [rsp+116], 0
L_break_loop_with_status:
; /* put in, out, bits, and hold back into ar and pop esp */
mov [rsp+16], rsi ; /* in */
mov [rsp+32], rdi ; /* out */
mov [rsp+88], ebx ; /* bits */
mov [rsp+80], rdx ; /* hold */
mov rax, [rsp] ; /* restore rbp and rsp */
mov rbp, [rsp+8]
mov rsp, rax
mov rsi,[rsp-8]
mov rdi,[rsp-16]
mov r12,[rsp-24]
mov r13,[rsp-32]
mov r14,[rsp-40]
mov r15,[rsp-48]
mov rbx,[rsp-56]
ret 0
; :
; : "m" (ar)
; : "memory", "%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi",
; "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15"
; );
inffas8664fnc ENDP
;_TEXT ENDS
END

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Summary
-------
This directory contains ASM implementations of the functions
longest_match() and inflate_fast(), for 64 bits x86 (both AMD64 and Intel EM64t),
for use with Microsoft Macro Assembler (x64) for AMD64 and Microsoft C++ 64 bits.
gvmat64.asm is written by Gilles Vollant (2005), by using Brian Raiter 686/32 bits
assembly optimized version from Jean-loup Gailly original longest_match function
inffasx64.asm and inffas8664.c were written by Chris Anderson, by optimizing
original function from Mark Adler
Use instructions
----------------
Assemble the .asm files using MASM and put the object files into the zlib source
directory. You can also get object files here:
http://www.winimage.com/zLibDll/zlib124_masm_obj.zip
define ASMV and ASMINF in your project. Include inffas8664.c in your source tree,
and inffasx64.obj and gvmat64.obj as object to link.
Build instructions
------------------
run bld_64.bat with Microsoft Macro Assembler (x64) for AMD64 (ml64.exe)
ml64.exe is given with Visual Studio 2005, Windows 2003 server DDK
You can get Windows 2003 server DDK with ml64 and cl for AMD64 from
http://www.microsoft.com/whdc/devtools/ddk/default.mspx for low price)

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ml /coff /Zi /c /Flmatch686.lst match686.asm
ml /coff /Zi /c /Flinffas32.lst inffas32.asm

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; match686.asm -- Asm portion of the optimized longest_match for 32 bits x86
; Copyright (C) 1995-1996 Jean-loup Gailly, Brian Raiter and Gilles Vollant.
; File written by Gilles Vollant, by converting match686.S from Brian Raiter
; for MASM. This is as assembly version of longest_match
; from Jean-loup Gailly in deflate.c
;
; http://www.zlib.net
; http://www.winimage.com/zLibDll
; http://www.muppetlabs.com/~breadbox/software/assembly.html
;
; For Visual C++ 4.x and higher and ML 6.x and higher
; ml.exe is distributed in
; http://www.microsoft.com/downloads/details.aspx?FamilyID=7a1c9da0-0510-44a2-b042-7ef370530c64
;
; this file contain two implementation of longest_match
;
; this longest_match was written by Brian raiter (1998), optimized for Pentium Pro
; (and the faster known version of match_init on modern Core 2 Duo and AMD Phenom)
;
; for using an assembly version of longest_match, you need define ASMV in project
;
; compile the asm file running
; ml /coff /Zi /c /Flmatch686.lst match686.asm
; and do not include match686.obj in your project
;
; note: contrib of zLib 1.2.3 and earlier contained both a deprecated version for
; Pentium (prior Pentium Pro) and this version for Pentium Pro and modern processor
; with autoselect (with cpu detection code)
; if you want support the old pentium optimization, you can still use these version
;
; this file is not optimized for old pentium, but it compatible with all x86 32 bits
; processor (starting 80386)
;
;
; see below : zlib1222add must be adjuster if you use a zlib version < 1.2.2.2
;uInt longest_match(s, cur_match)
; deflate_state *s;
; IPos cur_match; /* current match */
NbStack equ 76
cur_match equ dword ptr[esp+NbStack-0]
str_s equ dword ptr[esp+NbStack-4]
; 5 dword on top (ret,ebp,esi,edi,ebx)
adrret equ dword ptr[esp+NbStack-8]
pushebp equ dword ptr[esp+NbStack-12]
pushedi equ dword ptr[esp+NbStack-16]
pushesi equ dword ptr[esp+NbStack-20]
pushebx equ dword ptr[esp+NbStack-24]
chain_length equ dword ptr [esp+NbStack-28]
limit equ dword ptr [esp+NbStack-32]
best_len equ dword ptr [esp+NbStack-36]
window equ dword ptr [esp+NbStack-40]
prev equ dword ptr [esp+NbStack-44]
scan_start equ word ptr [esp+NbStack-48]
wmask equ dword ptr [esp+NbStack-52]
match_start_ptr equ dword ptr [esp+NbStack-56]
nice_match equ dword ptr [esp+NbStack-60]
scan equ dword ptr [esp+NbStack-64]
windowlen equ dword ptr [esp+NbStack-68]
match_start equ dword ptr [esp+NbStack-72]
strend equ dword ptr [esp+NbStack-76]
NbStackAdd equ (NbStack-24)
.386p
name gvmatch
.MODEL FLAT
; all the +zlib1222add offsets are due to the addition of fields
; in zlib in the deflate_state structure since the asm code was first written
; (if you compile with zlib 1.0.4 or older, use "zlib1222add equ (-4)").
; (if you compile with zlib between 1.0.5 and 1.2.2.1, use "zlib1222add equ 0").
; if you compile with zlib 1.2.2.2 or later , use "zlib1222add equ 8").
zlib1222add equ 8
; Note : these value are good with a 8 bytes boundary pack structure
dep_chain_length equ 74h+zlib1222add
dep_window equ 30h+zlib1222add
dep_strstart equ 64h+zlib1222add
dep_prev_length equ 70h+zlib1222add
dep_nice_match equ 88h+zlib1222add
dep_w_size equ 24h+zlib1222add
dep_prev equ 38h+zlib1222add
dep_w_mask equ 2ch+zlib1222add
dep_good_match equ 84h+zlib1222add
dep_match_start equ 68h+zlib1222add
dep_lookahead equ 6ch+zlib1222add
_TEXT segment
IFDEF NOUNDERLINE
public longest_match
public match_init
ELSE
public _longest_match
public _match_init
ENDIF
MAX_MATCH equ 258
MIN_MATCH equ 3
MIN_LOOKAHEAD equ (MAX_MATCH+MIN_MATCH+1)
MAX_MATCH equ 258
MIN_MATCH equ 3
MIN_LOOKAHEAD equ (MAX_MATCH + MIN_MATCH + 1)
MAX_MATCH_8_ equ ((MAX_MATCH + 7) AND 0FFF0h)
;;; stack frame offsets
chainlenwmask equ esp + 0 ; high word: current chain len
; low word: s->wmask
window equ esp + 4 ; local copy of s->window
windowbestlen equ esp + 8 ; s->window + bestlen
scanstart equ esp + 16 ; first two bytes of string
scanend equ esp + 12 ; last two bytes of string
scanalign equ esp + 20 ; dword-misalignment of string
nicematch equ esp + 24 ; a good enough match size
bestlen equ esp + 28 ; size of best match so far
scan equ esp + 32 ; ptr to string wanting match
LocalVarsSize equ 36
; saved ebx byte esp + 36
; saved edi byte esp + 40
; saved esi byte esp + 44
; saved ebp byte esp + 48
; return address byte esp + 52
deflatestate equ esp + 56 ; the function arguments
curmatch equ esp + 60
;;; Offsets for fields in the deflate_state structure. These numbers
;;; are calculated from the definition of deflate_state, with the
;;; assumption that the compiler will dword-align the fields. (Thus,
;;; changing the definition of deflate_state could easily cause this
;;; program to crash horribly, without so much as a warning at
;;; compile time. Sigh.)
dsWSize equ 36+zlib1222add
dsWMask equ 44+zlib1222add
dsWindow equ 48+zlib1222add
dsPrev equ 56+zlib1222add
dsMatchLen equ 88+zlib1222add
dsPrevMatch equ 92+zlib1222add
dsStrStart equ 100+zlib1222add
dsMatchStart equ 104+zlib1222add
dsLookahead equ 108+zlib1222add
dsPrevLen equ 112+zlib1222add
dsMaxChainLen equ 116+zlib1222add
dsGoodMatch equ 132+zlib1222add
dsNiceMatch equ 136+zlib1222add
;;; match686.asm -- Pentium-Pro-optimized version of longest_match()
;;; Written for zlib 1.1.2
;;; Copyright (C) 1998 Brian Raiter <breadbox@muppetlabs.com>
;;; You can look at http://www.muppetlabs.com/~breadbox/software/assembly.html
;;;
;;
;; This software is provided 'as-is', without any express or implied
;; warranty. In no event will the authors be held liable for any damages
;; arising from the use of this software.
;;
;; Permission is granted to anyone to use this software for any purpose,
;; including commercial applications, and to alter it and redistribute it
;; freely, subject to the following restrictions:
;;
;; 1. The origin of this software must not be misrepresented; you must not
;; claim that you wrote the original software. If you use this software
;; in a product, an acknowledgment in the product documentation would be
;; appreciated but is not required.
;; 2. Altered source versions must be plainly marked as such, and must not be
;; misrepresented as being the original software
;; 3. This notice may not be removed or altered from any source distribution.
;;
;GLOBAL _longest_match, _match_init
;SECTION .text
;;; uInt longest_match(deflate_state *deflatestate, IPos curmatch)
;_longest_match:
IFDEF NOUNDERLINE
longest_match proc near
ELSE
_longest_match proc near
ENDIF
.FPO (9, 4, 0, 0, 1, 0)
;;; Save registers that the compiler may be using, and adjust esp to
;;; make room for our stack frame.
push ebp
push edi
push esi
push ebx
sub esp, LocalVarsSize
;;; Retrieve the function arguments. ecx will hold cur_match
;;; throughout the entire function. edx will hold the pointer to the
;;; deflate_state structure during the function's setup (before
;;; entering the main loop.
mov edx, [deflatestate]
mov ecx, [curmatch]
;;; uInt wmask = s->w_mask;
;;; unsigned chain_length = s->max_chain_length;
;;; if (s->prev_length >= s->good_match) {
;;; chain_length >>= 2;
;;; }
mov eax, [edx + dsPrevLen]
mov ebx, [edx + dsGoodMatch]
cmp eax, ebx
mov eax, [edx + dsWMask]
mov ebx, [edx + dsMaxChainLen]
jl LastMatchGood
shr ebx, 2
LastMatchGood:
;;; chainlen is decremented once beforehand so that the function can
;;; use the sign flag instead of the zero flag for the exit test.
;;; It is then shifted into the high word, to make room for the wmask
;;; value, which it will always accompany.
dec ebx
shl ebx, 16
or ebx, eax
mov [chainlenwmask], ebx
;;; if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
mov eax, [edx + dsNiceMatch]
mov ebx, [edx + dsLookahead]
cmp ebx, eax
jl LookaheadLess
mov ebx, eax
LookaheadLess: mov [nicematch], ebx
;;; register Bytef *scan = s->window + s->strstart;
mov esi, [edx + dsWindow]
mov [window], esi
mov ebp, [edx + dsStrStart]
lea edi, [esi + ebp]
mov [scan], edi
;;; Determine how many bytes the scan ptr is off from being
;;; dword-aligned.
mov eax, edi
neg eax
and eax, 3
mov [scanalign], eax
;;; IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
;;; s->strstart - (IPos)MAX_DIST(s) : NIL;
mov eax, [edx + dsWSize]
sub eax, MIN_LOOKAHEAD
sub ebp, eax
jg LimitPositive
xor ebp, ebp
LimitPositive:
;;; int best_len = s->prev_length;
mov eax, [edx + dsPrevLen]
mov [bestlen], eax
;;; Store the sum of s->window + best_len in esi locally, and in esi.
add esi, eax
mov [windowbestlen], esi
;;; register ush scan_start = *(ushf*)scan;
;;; register ush scan_end = *(ushf*)(scan+best_len-1);
;;; Posf *prev = s->prev;
movzx ebx, word ptr [edi]
mov [scanstart], ebx
movzx ebx, word ptr [edi + eax - 1]
mov [scanend], ebx
mov edi, [edx + dsPrev]
;;; Jump into the main loop.
mov edx, [chainlenwmask]
jmp short LoopEntry
align 4
;;; do {
;;; match = s->window + cur_match;
;;; if (*(ushf*)(match+best_len-1) != scan_end ||
;;; *(ushf*)match != scan_start) continue;
;;; [...]
;;; } while ((cur_match = prev[cur_match & wmask]) > limit
;;; && --chain_length != 0);
;;;
;;; Here is the inner loop of the function. The function will spend the
;;; majority of its time in this loop, and majority of that time will
;;; be spent in the first ten instructions.
;;;
;;; Within this loop:
;;; ebx = scanend
;;; ecx = curmatch
;;; edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
;;; esi = windowbestlen - i.e., (window + bestlen)
;;; edi = prev
;;; ebp = limit
LookupLoop:
and ecx, edx
movzx ecx, word ptr [edi + ecx*2]
cmp ecx, ebp
jbe LeaveNow
sub edx, 00010000h
js LeaveNow
LoopEntry: movzx eax, word ptr [esi + ecx - 1]
cmp eax, ebx
jnz LookupLoop
mov eax, [window]
movzx eax, word ptr [eax + ecx]
cmp eax, [scanstart]
jnz LookupLoop
;;; Store the current value of chainlen.
mov [chainlenwmask], edx
;;; Point edi to the string under scrutiny, and esi to the string we
;;; are hoping to match it up with. In actuality, esi and edi are
;;; both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and edx is
;;; initialized to -(MAX_MATCH_8 - scanalign).
mov esi, [window]
mov edi, [scan]
add esi, ecx
mov eax, [scanalign]
mov edx, 0fffffef8h; -(MAX_MATCH_8)
lea edi, [edi + eax + 0108h] ;MAX_MATCH_8]
lea esi, [esi + eax + 0108h] ;MAX_MATCH_8]
;;; Test the strings for equality, 8 bytes at a time. At the end,
;;; adjust edx so that it is offset to the exact byte that mismatched.
;;;
;;; We already know at this point that the first three bytes of the
;;; strings match each other, and they can be safely passed over before
;;; starting the compare loop. So what this code does is skip over 0-3
;;; bytes, as much as necessary in order to dword-align the edi
;;; pointer. (esi will still be misaligned three times out of four.)
;;;
;;; It should be confessed that this loop usually does not represent
;;; much of the total running time. Replacing it with a more
;;; straightforward "rep cmpsb" would not drastically degrade
;;; performance.
LoopCmps:
mov eax, [esi + edx]
xor eax, [edi + edx]
jnz LeaveLoopCmps
mov eax, [esi + edx + 4]
xor eax, [edi + edx + 4]
jnz LeaveLoopCmps4
add edx, 8
jnz LoopCmps
jmp short LenMaximum
LeaveLoopCmps4: add edx, 4
LeaveLoopCmps: test eax, 0000FFFFh
jnz LenLower
add edx, 2
shr eax, 16
LenLower: sub al, 1
adc edx, 0
;;; Calculate the length of the match. If it is longer than MAX_MATCH,
;;; then automatically accept it as the best possible match and leave.
lea eax, [edi + edx]
mov edi, [scan]
sub eax, edi
cmp eax, MAX_MATCH
jge LenMaximum
;;; If the length of the match is not longer than the best match we
;;; have so far, then forget it and return to the lookup loop.
mov edx, [deflatestate]
mov ebx, [bestlen]
cmp eax, ebx
jg LongerMatch
mov esi, [windowbestlen]
mov edi, [edx + dsPrev]
mov ebx, [scanend]
mov edx, [chainlenwmask]
jmp LookupLoop
;;; s->match_start = cur_match;
;;; best_len = len;
;;; if (len >= nice_match) break;
;;; scan_end = *(ushf*)(scan+best_len-1);
LongerMatch: mov ebx, [nicematch]
mov [bestlen], eax
mov [edx + dsMatchStart], ecx
cmp eax, ebx
jge LeaveNow
mov esi, [window]
add esi, eax
mov [windowbestlen], esi
movzx ebx, word ptr [edi + eax - 1]
mov edi, [edx + dsPrev]
mov [scanend], ebx
mov edx, [chainlenwmask]
jmp LookupLoop
;;; Accept the current string, with the maximum possible length.
LenMaximum: mov edx, [deflatestate]
mov dword ptr [bestlen], MAX_MATCH
mov [edx + dsMatchStart], ecx
;;; if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
;;; return s->lookahead;
LeaveNow:
mov edx, [deflatestate]
mov ebx, [bestlen]
mov eax, [edx + dsLookahead]
cmp ebx, eax
jg LookaheadRet
mov eax, ebx
LookaheadRet:
;;; Restore the stack and return from whence we came.
add esp, LocalVarsSize
pop ebx
pop esi
pop edi
pop ebp
ret
; please don't remove this string !
; Your can freely use match686 in any free or commercial app if you don't remove the string in the binary!
db 0dh,0ah,"asm686 with masm, optimised assembly code from Brian Raiter, written 1998",0dh,0ah
IFDEF NOUNDERLINE
longest_match endp
ELSE
_longest_match endp
ENDIF
IFDEF NOUNDERLINE
match_init proc near
ret
match_init endp
ELSE
_match_init proc near
ret
_match_init endp
ENDIF
_TEXT ends
end

27
zlib/contrib/masmx86/readme.txt Normal file
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Summary
-------
This directory contains ASM implementations of the functions
longest_match() and inflate_fast().
Use instructions
----------------
Assemble using MASM, and copy the object files into the zlib source
directory, then run the appropriate makefile, as suggested below. You can
donwload MASM from here:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=7a1c9da0-0510-44a2-b042-7ef370530c64
You can also get objects files here:
http://www.winimage.com/zLibDll/zlib124_masm_obj.zip
Build instructions
------------------
* With Microsoft C and MASM:
nmake -f win32/Makefile.msc LOC="-DASMV -DASMINF" OBJA="match686.obj inffas32.obj"
* With Borland C and TASM:
make -f win32/Makefile.bor LOCAL_ZLIB="-DASMV -DASMINF" OBJA="match686.obj inffas32.obj" OBJPA="+match686c.obj+match686.obj+inffas32.obj"

25
zlib/contrib/minizip/Makefile Normal file
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CC=cc
CFLAGS=-O -I../..
UNZ_OBJS = miniunz.o unzip.o ioapi.o ../../libz.a
ZIP_OBJS = minizip.o zip.o ioapi.o ../../libz.a
.c.o:
$(CC) -c $(CFLAGS) $*.c
all: miniunz minizip
miniunz: $(UNZ_OBJS)
$(CC) $(CFLAGS) -o $@ $(UNZ_OBJS)
minizip: $(ZIP_OBJS)
$(CC) $(CFLAGS) -o $@ $(ZIP_OBJS)
test: miniunz minizip
./minizip test readme.txt
./miniunz -l test.zip
mv readme.txt readme.old
./miniunz test.zip
clean:
/bin/rm -f *.o *~ minizip miniunz

45
zlib/contrib/minizip/Makefile.am Normal file
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lib_LTLIBRARIES = libminizip.la
if COND_DEMOS
bin_PROGRAMS = miniunzip minizip
endif
zlib_top_srcdir = $(top_srcdir)/../..
zlib_top_builddir = $(top_builddir)/../..
AM_CPPFLAGS = -I$(zlib_top_srcdir)
AM_LDFLAGS = -L$(zlib_top_builddir)
if WIN32
iowin32_src = iowin32.c
iowin32_h = iowin32.h
endif
libminizip_la_SOURCES = \
ioapi.c \
mztools.c \
unzip.c \
zip.c \
${iowin32_src}
libminizip_la_LDFLAGS = $(AM_LDFLAGS) -version-info 1:0:0 -lz
minizip_includedir = $(includedir)/minizip
minizip_include_HEADERS = \
crypt.h \
ioapi.h \
mztools.h \
unzip.h \
zip.h \
${iowin32_h}
pkgconfigdir = $(libdir)/pkgconfig
pkgconfig_DATA = minizip.pc
EXTRA_PROGRAMS = miniunzip minizip
miniunzip_SOURCES = miniunz.c
miniunzip_LDADD = libminizip.la
minizip_SOURCES = minizip.c
minizip_LDADD = libminizip.la -lz

6
zlib/contrib/minizip/MiniZip64_Changes.txt Normal file
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MiniZip 1.1 was derrived from MiniZip at version 1.01f
Change in 1.0 (Okt 2009)
- **TODO - Add history**

74
zlib/contrib/minizip/MiniZip64_info.txt Normal file
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MiniZip - Copyright (c) 1998-2010 - by Gilles Vollant - version 1.1 64 bits from Mathias Svensson
Introduction
---------------------
MiniZip 1.1 is built from MiniZip 1.0 by Gilles Vollant ( http://www.winimage.com/zLibDll/minizip.html )
When adding ZIP64 support into minizip it would result into risk of breaking compatibility with minizip 1.0.
All possible work was done for compatibility.
Background
---------------------
When adding ZIP64 support Mathias Svensson found that Even Rouault have added ZIP64
support for unzip.c into minizip for a open source project called gdal ( http://www.gdal.org/ )
That was used as a starting point. And after that ZIP64 support was added to zip.c
some refactoring and code cleanup was also done.
Changed from MiniZip 1.0 to MiniZip 1.1
---------------------------------------
* Added ZIP64 support for unzip ( by Even Rouault )
* Added ZIP64 support for zip ( by Mathias Svensson )
* Reverted some changed that Even Rouault did.
* Bunch of patches received from Gulles Vollant that he received for MiniZip from various users.
* Added unzip patch for BZIP Compression method (patch create by Daniel Borca)
* Added BZIP Compress method for zip
* Did some refactoring and code cleanup
Credits
Gilles Vollant - Original MiniZip author
Even Rouault - ZIP64 unzip Support
Daniel Borca - BZip Compression method support in unzip
Mathias Svensson - ZIP64 zip support
Mathias Svensson - BZip Compression method support in zip
Resources
ZipLayout http://result42.com/projects/ZipFileLayout
Command line tool for Windows that shows the layout and information of the headers in a zip archive.
Used when debugging and validating the creation of zip files using MiniZip64
ZIP App Note http://www.pkware.com/documents/casestudies/APPNOTE.TXT
Zip File specification
Notes.
* To be able to use BZip compression method in zip64.c or unzip64.c the BZIP2 lib is needed and HAVE_BZIP2 need to be defined.
License
----------------------------------------------------------
Condition of use and distribution are the same than zlib :
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
----------------------------------------------------------

32
zlib/contrib/minizip/configure.ac Normal file
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# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_INIT([minizip], [1.2.7], [bugzilla.redhat.com])
AC_CONFIG_SRCDIR([minizip.c])
AM_INIT_AUTOMAKE([foreign])
LT_INIT
AC_MSG_CHECKING([whether to build example programs])
AC_ARG_ENABLE([demos], AC_HELP_STRING([--enable-demos], [build example programs]))
AM_CONDITIONAL([COND_DEMOS], [test "$enable_demos" = yes])
if test "$enable_demos" = yes
then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
case "${host}" in
*-mingw* | mingw*)
WIN32="yes"
;;
*)
;;
esac
AM_CONDITIONAL([WIN32], [test "${WIN32}" = "yes"])
AC_SUBST([HAVE_UNISTD_H], [0])
AC_CHECK_HEADER([unistd.h], [HAVE_UNISTD_H=1], [])
AC_CONFIG_FILES([Makefile minizip.pc])
AC_OUTPUT

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