PR libstdc++/15002 (continued again)

2004-04-25  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/15002 (continued again)
	* include/bits/istream.tcc (getline(basic_istream<>&,
	basic_string<>&, _CharT)): Use a temporary buffer, thus
	avoiding reallocation for common case.

	* include/bits/basic_string.tcc (_S_construct(_InIterator,
	_InIterator, const _Alloc&, input_iterator_tag)): Tweak size
	of temporary buffer to a power of two.

	* testsuite/27_io/basic_istream/getline/char/4.cc: Add comment.

From-SVN: r81163