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fstream.tcc (basic_filebuf::seekoff): Fix for output-only filebufs.

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* include/bits/fstream.tcc (basic_filebuf::seekoff): Fix for
        output-only filebufs.
        * include/std/std_fstream.h (basic_filebuf::_M_set_indeterminate):
        Likewise.
        (basic_filebuf::_M_set_determinate): Likewise.

From-SVN: r52685
This commit is contained in:
Jason Merrill 2002-04-23 17:56:10 -04:00 • committed by Jason Merrill
parent 74c263af80
commit 736020b4a7
4 changed files with 16 additions and 3 deletions
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6
libstdc++-v3/ChangeLog
View file

@ -1,5 +1,11 @@
2002-04-23 Jason Merrill <jason@redhat.com>
* include/bits/fstream.tcc (basic_filebuf::seekoff): Fix for
output-only filebufs.
* include/std/std_fstream.h (basic_filebuf::_M_set_indeterminate):
Likewise.
(basic_filebuf::_M_set_determinate): Likewise.
PR libstdc++/6414
* include/bits/fstream.tcc (basic_filebuf::seekoff): Adjust return
value properly in the trivial case.

2
libstdc++-v3/include/bits/fstream.tcc
View file

@ -567,7 +567,7 @@ namespace std
else
{
__ret = _M_file.seekoff(__off, ios_base::cur, __mode);
__ret += _M_in_cur - _M_filepos;
__ret += max(_M_out_cur, _M_in_cur) - _M_filepos;
}
}
_M_last_overflowed = false;

4
libstdc++-v3/include/std/std_fstream.h
View file

@ -264,7 +264,7 @@ namespace std
this->setg(_M_buf, _M_buf, _M_buf);
if (_M_mode & ios_base::out)
this->setp(_M_buf, _M_buf);
_M_filepos = _M_in_end;
_M_filepos = _M_buf;
}
void
@ -276,7 +276,7 @@ namespace std
this->setg(_M_buf, _M_buf, _M_buf + __off);
if (__testout)
this->setp(_M_buf, _M_buf + __off);
_M_filepos = _M_in_end;
_M_filepos = _M_buf + __off;
}
bool

7
libstdc++-v3/testsuite/27_io/ostream_seeks.cc
View file

@ -167,6 +167,13 @@ void test04(void)
pos06 = is03.tellp();
VERIFY( pos05 == pos06 );
// libstdc++/6414
if01.seekg(0, std::ios_base::beg);
pos01 = if01.tellg();
if01.peek();
pos02 = if01.tellg();
VERIFY( pos02 == pos01 );
#ifdef DEBUG_ASSERT
assert(test);
#endif