c6e8380069
libcpp: * Makefile.am: Add makedepend. * Makefile.in, aclocal.m4: Regenerate. * charset.c: Insert a space to avoid a warning. * directives.c: Include mkdeps.h. (_cpp_handle_directive): Reenable macro expander if appropriate. (undefine_macros): Inline body of _cpp_free_definition for speed. Do not call undef callback or _cpp_warn_if_unused_macro. (cpp_get_deps): New interface. * files.c (search_cache): Add pfile argument. Check for file that would be found by "" or <> search here... (_cpp_find_file): ...not here. Correct recorded start_dir of files found by directory-of-current-file search that would be found by "" or <> search. * init.c (cpp_add_dependency_target): Delete. * internal.h (struct lexer_state): Add discarding_output flag. * lex.c (lex_identifier): Compute hash function while scanning. * macro.c (cpp_scan_nooutput): Disable macro expansion outside directives. * makedepend.c: New file. * mkdeps.c (struct deps): Add vpath vector. (apply_vpath, deps_add_vpath): New function. (deps_free): Free vpath vector. (deps_add_dep, deps_add_target): Use apply_vpath. * symtab.c (calc_hash): Use HT_HASHSTEP and HT_FINISH. (ht_lookup_with_hash): New function. * cpplib.h, mkdeps.h: Update prototypes. * symtab.h: Update prototypes. (HT_HASHSTEP, HT_FINISH): New macros. gcc: * Makefile.in (MKDEPS_H): New shorthand. (c-opts.o): Update dependencies. * c-opts.c: Include mkdeps.h. (handle_deferred_opts): Use cpp_get_deps and deps_add_target, not cpp_add_dependency_target. From-SVN: r82654
93 lines
3 KiB
C
93 lines
3 KiB
C
/* Hash tables.
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Copyright (C) 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef LIBCPP_SYMTAB_H
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#define LIBCPP_SYMTAB_H
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#include "obstack.h"
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#define GTY(x) /* nothing */
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/* This is what each hash table entry points to. It may be embedded
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deeply within another object. */
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typedef struct ht_identifier ht_identifier;
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struct ht_identifier GTY(())
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{
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const unsigned char *str;
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unsigned int len;
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unsigned int hash_value;
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};
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#define HT_LEN(NODE) ((NODE)->len)
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#define HT_STR(NODE) ((NODE)->str)
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typedef struct ht hash_table;
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typedef struct ht_identifier *hashnode;
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enum ht_lookup_option {HT_NO_INSERT = 0, HT_ALLOC, HT_ALLOCED};
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/* An identifier hash table for cpplib and the front ends. */
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struct ht
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{
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/* Identifiers are allocated from here. */
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struct obstack stack;
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hashnode *entries;
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/* Call back. */
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hashnode (*alloc_node) (hash_table *);
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unsigned int nslots; /* Total slots in the entries array. */
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unsigned int nelements; /* Number of live elements. */
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/* Link to reader, if any. For the benefit of cpplib. */
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struct cpp_reader *pfile;
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/* Table usage statistics. */
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unsigned int searches;
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unsigned int collisions;
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/* Should 'entries' be freed when it is no longer needed? */
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bool entries_owned;
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};
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/* Initialize the hashtable with 2 ^ order entries. */
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extern hash_table *ht_create (unsigned int order);
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/* Frees all memory associated with a hash table. */
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extern void ht_destroy (hash_table *);
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extern hashnode ht_lookup (hash_table *, const unsigned char *,
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size_t, enum ht_lookup_option);
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extern hashnode ht_lookup_with_hash (hash_table *, const unsigned char *,
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size_t, unsigned int,
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enum ht_lookup_option);
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#define HT_HASHSTEP(r, c) ((r) * 67 + ((c) - 113));
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#define HT_HASHFINISH(r, len) ((r) + (len))
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/* For all nodes in TABLE, make a callback. The callback takes
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TABLE->PFILE, the node, and a PTR, and the callback sequence stops
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if the callback returns zero. */
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typedef int (*ht_cb) (struct cpp_reader *, hashnode, const void *);
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extern void ht_forall (hash_table *, ht_cb, const void *);
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/* Restore the hash table. */
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extern void ht_load (hash_table *ht, hashnode *entries,
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unsigned int nslots, unsigned int nelements, bool own);
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/* Dump allocation statistics to stderr. */
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extern void ht_dump_statistics (hash_table *);
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#endif /* LIBCPP_SYMTAB_H */
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