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fstream.tcc (setbuf): Allow (__s...

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2003-06-18  Nathan C. Myers  <ncm-nospam@cantrip.org>
	    Paolo Carlini  <pcarlini@unitus.it>

	* include/bits/fstream.tcc (setbuf): Allow (__s, 1) too,
	simply equivalent to the unbuffered case (0, 0) as far as
	_M_buf_size is concerned.

Co-Authored-By: Paolo Carlini <pcarlini@unitus.it>

From-SVN: r68160
This commit is contained in:
Nathan C. Myers 2003-06-18 17:17:52 +00:00 committed by Paolo Carlini
parent 5a9335ef01
commit c1b74c211a
2 changed files with 15 additions and 7 deletions
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7
libstdc++-v3/ChangeLog
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@ -1,3 +1,10 @@
2003-06-18 Nathan C. Myers <ncm-nospam@cantrip.org>
Paolo Carlini <pcarlini@unitus.it>
* include/bits/fstream.tcc (setbuf): Allow (__s, 1) too,
simply equivalent to the unbuffered case (0, 0) as far as
_M_buf_size is concerned.
2003-06-18 Andreas Jaeger <aj@suse.de>
* testsuite/Makefile.am (new-abi-baseline): Create baseline

15
libstdc++-v3/include/bits/fstream.tcc
View File

@ -429,15 +429,16 @@ namespace std
{
if (!this->is_open() && __s == 0 && __n == 0)
this->_M_buf_size = 1;
else if (__s && __n > 1)
else if (__s && __n >= 1)
{
// This is implementation-defined behavior, and assumes that
// an external char_type array of length (__s + __n) exists
// and has been pre-allocated. If this is not the case,
// things will quickly blow up. The length argument __n must
// be greater than 1 because __n - 1 positions will be used
// for the get and put areas, and 1 position is needed to
// host the overflow char of a full put area.
// an external char_type array of length __n exists and has
// been pre-allocated. If this is not the case, things will
// quickly blow up. When __n > 1, __n - 1 positions will be
// used for the get area, __n - 1 for the put area and 1
// position to host the overflow char of a full put area.
// When __n == 1, 1 position will be used for the get area
// and 0 for the put area, as in the unbuffered case above.
// Step 1: Destroy the current internal array.
_M_destroy_internal_buffer();