2001-05-07  Benjamin Kosnik  <bkoz@redhat.com>

	libstdc++/2523
	* include/bits/std_fstream.h (basic_filebuf): Change signature.
	* include/bits/fstream.tcc (basic_filebuf): Change bool argument
	to int_type, pass in buffer size info.
	* include/bits/std_streambuf.h (_M_is_indeterminate): Check for
	unbuffered situation.
	(underflow): Remove codecvt bits for the time being.
	* include/bits/istream.tcc (istream::sentry): Avoid sputbackc call.
	* include/bits/locale_facets.tcc (_M_extract): Cache dereference
	values from iterators, clean.
	* src/locale.cc: Ditto.
	* include/bits/sbuf_iter.h: Format.
	* src/ios.cc: Explicitly pass in buffer sizes at creation time.
	* testsuite/27_io/narrow_stream_objects.cc: Add tests.
	* testsuite/27_io/filebuf.cc: Tweaks.
	* testsuite/27_io/filebuf_members.cc: Tweaks.

From-SVN: r41908