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Fix basic_filebuf's internal buffer is shrinking when using with some codecvt. http://llvm.org/bugs/show_bug.cgi?id=13602

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@162585 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant 2012-08-24 20:37:00 +00:00
parent e7d59f2601
commit ec423cb8d4
1 changed files with 3 additions and 2 deletions
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5
include/fstream
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@ -596,7 +596,7 @@ basic_filebuf<_CharT, _Traits>::underflow()
memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_);
__extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_);
__extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_);
size_t __nmemb = _VSTD::min(static_cast<size_t>(this->egptr() - this->eback() - __unget_sz),
size_t __nmemb = _VSTD::min(static_cast<size_t>(__ibs_ - __unget_sz),
static_cast<size_t>(__extbufend_ - __extbufnext_));
codecvt_base::result __r;
state_type __svs = __st_;
@ -611,7 +611,7 @@ basic_filebuf<_CharT, _Traits>::underflow()
char_type* __inext;
__r = __cv_->in(__st_, __extbuf_, __extbufend_, __extbufnext_,
this->eback() + __unget_sz,
this->egptr(), __inext);
this->eback() + __ibs_, __inext);
if (__r == codecvt_base::noconv)
{
this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)__extbufend_);
@ -816,6 +816,7 @@ basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode)
return pos_type(off_type(-1));
if (fseeko(__file_, __sp, SEEK_SET))
return pos_type(off_type(-1));
__st_ = __sp.state;
return __sp;
}