re PR libstdc++/13171 (Bugs in basic_filebuf::imbue)

re PR libstdc++/13171 (Bugs in basic_filebuf::imbue)

2003-11-26  Paolo Carlini  <pcarlini@suse.de>
	    Petur Runolfsson  <peturr02@ru.is>

	PR libstdc++/13171
	* include/bits/fstream.tcc (imbue): Relax the conditions under
	which the function succeeds: allow for two consecutive calls with
	the same name; state dependent encodings are ok even after open
	if at the beginning of the file; don't check seekoff return value
	(pipes, cin, cout, etc...)
	* testsuite/27_io/basic_filebuf/imbue/char/13171-1.cc: New.
	* testsuite/27_io/basic_filebuf/imbue/char/13171-2.cc: New.
	* testsuite/27_io/basic_filebuf/imbue/char/13171-3.cc: New.
	* testsuite/27_io/basic_filebuf/imbue/char/13171-4.cc: New.
	* testsuite/27_io/basic_filebuf/imbue/char/2.cc: Tweak comment.
	* testsuite/27_io/basic_filebuf/imbue/char/3.cc: Likewise.
	* testsuite/27_io/basic_filebuf/imbue/wchar_t/2.cc: Tweak comment.
	* testsuite/27_io/basic_filebuf/imbue/wchar_t/3.cc: Likewise.

	* testsuite/27_io/basic_filebuf/imbue/wchar_t/12868.cc: More
	correctly use the UTF-8 locale appearing in the PR.

Co-Authored-By: Petur Runolfsson <peturr02@ru.is>
From-SVN: r73954