re PR libstdc++/21955 (std::stringbuf vs. in_avail)

2005-06-08  Benjamin Kosnik  <bkoz@redhat.com>

	PR libstdc++/21955
	* include/std/std_sstream.h (basic_stringbuf::showmanyc): Add.
	Remove unnecessary this->_M_mode decoration.
	* include/bits/fstream.tcc: Adjust line spacing.
	* testsuite/27_io/basic_streambuf/in_avail/char/1.cc: New, test
	base class behavior.
	* testsuite/27_io/basic_streambuf/in_avail/wchar_t/1.cc: Same.
	* testsuite/27_io/basic_stringbuf/in_avail/char/21955.cc: New.
	* testsuite/27_io/basic_stringbuf/in_avail/char/1.cc: Match
	filebuf behavior.
	* testsuite/27_io/basic_stringbuf/in_avail/wchar_t/1.cc: Same.
	* testsuite/27_io/basic_stringbuf/str/wchar_t/1.cc: Same.
	* testsuite/27_io/basic_stringbuf/str/char/1.cc: Same.
	* testsuite/27_io/basic_streambuf/in_avail/char/9701-3.cc: Move...
	* testsuite/27_io/basic_filebuf/in_avail/char/9701-3.cc: ...here.

From-SVN: r100770