------- Comment #57 from paolo at gcc dot gnu dot org 2010-09-22 19:41 ------- Subject: Bug 45628
Author: paolo Date: Wed Sep 22 19:40:43 2010 New Revision: 164529 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=164529 Log: 2010-09-22 David Krauss <pot...@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..." Added: trunk/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/45628-2.cc trunk/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/45628-1.cc Removed: trunk/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/char/1.cc trunk/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/wchar_t/ Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/config/abi/pre/gnu.ver trunk/libstdc++-v3/include/bits/fstream.tcc trunk/libstdc++-v3/include/std/fstream trunk/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/4.cc trunk/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/4.cc trunk/libstdc++-v3/testsuite/util/testsuite_character.h -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45628
