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3531cf5ef3
gcc/libstdc++-v3/include
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David Krauss 3531cf5ef3 re PR libstdc++/45628 (std::fstream::tellg invalidates I/O buffer) 
2010-09-22  David Krauss  <potswa@mac.com>

	PR libstdc++/45628
	* include/bits/fstream.tcc (basic_filebuf::underflow): Add state
	transition to avoid modality requiring seekoff(0,ios::cur).
	(basic_filebuf::pbackfail): Likewise.
	(basic_filebuf::overflow): Likewise.
	(basic_filebuf::_M_seek): Avoid minor unnecessary conversion.
	(basic_filebuf::seekoff): Remove code to _M_get_ext_pos; make
	(0, ios::cur) a special case preserving buffer contents.
	(basic_filebuf::_M_get_ext_pos): New function to obtain status
	about codecvt extern_t buffer for overflow and seekoff.
	* include/std/fstream (basic_filebuf::_M_get_ext_pos): Likewise.
	* config/abi/pre/gnu.ver: Export new symbols.
	* testsuite/27_io/basic_filebuf/seekoff/char/45628-1.cc: New,
	verifies that seekoff(0, ios::cur) preserves buffers.
	* testsuite/27_io/basic_filebuf/seekoff/char/45628-2.cc: Likewise.
	for codecvt case. More lenient as it may still flush put area.
	* testsuite/27_io/basic_filebuf/seekoff/char/4.cc: Modify to
	check that seekoff is not required between read and write.
	* testsuite/27_io/basic_filebuf/seekoff/wchar_t/4.cc: Likewise.
	* testsuite/27_io/basic_filebuf/sync/wchar_t/1.cc: Remove.
	* testsuite/27_io/basic_filebuf/sync/wchar_t/1.cc: Likewise.
	* testsuite/util/testsuite_character.h (codecvt::do_length): Comply
	with 22.2.1.5.2/10 "Returns ... the LARGEST value in the range..."

From-SVN: r164529
2010-09-22 19:40:43 +00:00
..
backward
bits re PR libstdc++/45628 (std::fstream::tellg invalidates I/O buffer) 2010-09-22 19:40:43 +00:00
c
c_compatibility
c_global re PR libstdc++/45300 (in cstdio/cstdlib keyword restrict is used instead of __restrict) 2010-08-17 13:15:41 +00:00
c_std re PR libstdc++/45300 (in cstdio/cstdlib keyword restrict is used instead of __restrict) 2010-08-17 13:15:41 +00:00
debug functional_hash.h (__hash_base): Add. 2010-09-22 17:50:36 +00:00
decimal
ext Uglify C++ headers some more. 2010-09-19 09:44:24 +00:00
parallel Uglify C++ headers some more. 2010-09-19 09:44:24 +00:00
precompiled typeindex: New. 2010-09-22 12:04:08 +00:00
profile functional_hash.h (__hash_base): Add. 2010-09-22 17:50:36 +00:00
std re PR libstdc++/45628 (std::fstream::tellg invalidates I/O buffer) 2010-09-22 19:40:43 +00:00
tr1 re PR libstdc++/45613 (bits/random.h misses include guards) 2010-09-09 11:23:39 +00:00
tr1_impl
Makefile.am typeindex: New. 2010-09-22 12:04:08 +00:00
Makefile.in typeindex: New. 2010-09-22 12:04:08 +00:00