2003-11-25  Paolo Carlini  <pcarlini@suse.de>

	* config/locale/gnu/codecvt_members.cc (codecvt::do_length):
	Rewrite, using both mbsnrtowcs and mbrtowc in a loop: the
	former is very fast, but stops if encounters a NUL.
	(codecvt::do_out): Tweaks.
	(codecvt::do_in): Tweaks, improve the code dealing with errors.
	* testsuite/performance/wchar_t_length.cc: New.

From-SVN: r73934