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std_sstream.h (basic_stringbuf<>::setbuf): Simply clear the internal _M_string, adjust _M_sync call.

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2006-02-19  Paolo Carlini  <pcarlini@suse.de>

	* include/std/std_sstream.h (basic_stringbuf<>::setbuf): Simply
	clear the internal _M_string, adjust _M_sync call.
	* include/bits/sstream.tcc (basic_stringbuf<>::_M_sync): Adjust
	consistently for calls from setbuf.

From-SVN: r111274
This commit is contained in:
Paolo Carlini 2006-02-19 18:27:06 +00:00 committed by Paolo Carlini
parent 4cf4d6a323
commit 62448787eb
3 changed files with 23 additions and 16 deletions
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7
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,10 @@
2006-02-19 Paolo Carlini <pcarlini@suse.de>
* include/std/std_sstream.h (basic_stringbuf<>::setbuf): Simply
clear the internal _M_string, adjust _M_sync call.
* include/bits/sstream.tcc (basic_stringbuf<>::_M_sync): Adjust
consistently for calls from setbuf.
2006-02-17 Paolo Carlini <pcarlini@suse.de>
Howard Hinnant <hhinnant@apple.com>

28
libstdc++-v3/include/bits/sstream.tcc
View File

@ -225,9 +225,6 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
return __ret;
}
// Assumes: contents of _M_string and internal buffer match exactly.
// __i == _M_in_cur - _M_in_beg
// __o == _M_out_cur - _M_out_beg
template <class _CharT, class _Traits, class _Alloc>
void
basic_stringbuf<_CharT, _Traits, _Alloc>::
@ -235,25 +232,28 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
{
const bool __testin = _M_mode & ios_base::in;
const bool __testout = _M_mode & ios_base::out;
char_type* __end = __base + _M_string.size();
char_type* __endg = __base + _M_string.size();
char_type* __endp = __base + _M_string.capacity();
if (__base != _M_string.data())
{
// setbuf: __i == size of buffer area (_M_string.size() == 0).
__endg += __i;
__i = 0;
__endp = __endg;
}
if (__testin)
this->setg(__base, __base + __i, __end);
this->setg(__base, __base + __i, __endg);
if (__testout)
{
// If __base comes from setbuf we cannot trust capacity()
// to match the size of the buffer area: in general, after
// Step 1 in setbuf, _M_string.capacity() >= __n.
if (__base == _M_string.data())
this->setp(__base, __base + _M_string.capacity());
else
this->setp(__base, __end);
this->setp(__base, __endp);
this->pbump(__o);
// egptr() always tracks the string end. When !__testin,
// for the correct functioning of the streambuf inlines
// the other get area pointers are identical.
if (!__testin)
this->setg(__end, __end, __end);
this->setg(__endg, __endg, __endg);
}
}

4
libstdc++-v3/include/std/std_sstream.h
View File

@ -211,10 +211,10 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
// things will quickly blow up.
// Step 1: Destroy the current internal array.
_M_string.assign(__s, __n);
_M_string.clear();
// Step 2: Use the external array.
_M_sync(__s, 0, 0);
_M_sync(__s, __n, 0);
}
return this;
}