generic-library/cxx
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Set failbit when strtold sets errno to ERANGE when parsing floating point values.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@179461 91177308-0d34-0410-b5e6-96231b3b80d8
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Howard Hinnant
2013-04-13 18:19:25 +00:00
parent a5733b3ad3
commit 4f67100219
2 changed files with 55 additions and 0 deletions
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7
include/locale
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@@ -906,13 +906,20 @@ __num_get_float(const char* __a, const char* __a_end, ios_base::iostate& __err)
{
if (__a != __a_end)
{
typename remove_reference<decltype(errno)>::type __save_errno = errno;
errno = 0;
char *__p2;
long double __ld = strtold_l(__a, &__p2, _LIBCPP_GET_C_LOCALE);
typename remove_reference<decltype(errno)>::type __current_errno = errno;
if (__current_errno == 0)
errno = __save_errno;
if (__p2 != __a_end)
{
__err = ios_base::failbit;
return 0;
}
else if (__current_errno == ERANGE)
__err = ios_base::failbit;
return static_cast<_Tp>(__ld);
}
__err = ios_base::failbit;