basic_filebuf needs to delay obtaining a codecvt facet from the global locale to give the client a chance to imbue the proper locale. Fixes http://llvm.org/bugs/show_bug.cgi?id=13663.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@162567 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/fstream b/include/fstream
index 8e1b1fb..4a9cb72 100644
--- a/include/fstream
+++ b/include/fstream
@@ -253,15 +253,20 @@
__intbuf_(0),
__ibs_(0),
__file_(0),
- __cv_(&use_facet<codecvt<char_type, char, state_type> >(this->getloc())),
+ __cv_(nullptr),
__st_(),
__om_(0),
__cm_(0),
__owns_eb_(false),
__owns_ib_(false),
- __always_noconv_(__cv_->always_noconv())
+ __always_noconv_(false)
{
setbuf(0, 4096);
+ if (has_facet<codecvt<char_type, char, state_type> >(this->getloc()))
+ {
+ __cv_ = &use_facet<codecvt<char_type, char, state_type> >(this->getloc());
+ __always_noconv_ = __cv_->always_noconv();
+ }
}
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
@@ -598,6 +603,10 @@
size_t __nr = fread((void*)__extbufnext_, 1, __nmemb, __file_);
if (__nr != 0)
{
+#ifndef _LIBCPP_NO_EXCEPTIONS
+ if (!__cv_)
+ throw bad_cast();
+#endif
__extbufend_ = __extbufnext_ + __nr;
char_type* __inext;
__r = __cv_->in(__st_, __extbuf_, __extbufend_, __extbufnext_,
@@ -676,6 +685,10 @@
codecvt_base::result __r;
do
{
+#ifndef _LIBCPP_NO_EXCEPTIONS
+ if (!__cv_)
+ throw bad_cast();
+#endif
const char_type* __e;
__r = __cv_->out(__st_, this->pbase(), this->pptr(), __e,
__extbuf_, __extbuf_ + __ebs_, __extbe);
@@ -765,6 +778,10 @@
basic_filebuf<_CharT, _Traits>::seekoff(off_type __off, ios_base::seekdir __way,
ios_base::openmode)
{
+#ifndef _LIBCPP_NO_EXCEPTIONS
+ if (!__cv_)
+ throw bad_cast();
+#endif
int __width = __cv_->encoding();
if (__file_ == 0 || (__width <= 0 && __off != 0) || sync())
return pos_type(off_type(-1));
@@ -808,6 +825,10 @@
{
if (__file_ == 0)
return 0;
+#ifndef _LIBCPP_NO_EXCEPTIONS
+ if (!__cv_)
+ throw bad_cast();
+#endif
if (__cm_ & ios_base::out)
{
if (this->pptr() != this->pbase())