commit 4f67100219b086fa6729db9693b6ee9939a73e70
author Howard Hinnant <hhinnant@apple.com> Sat Apr 13 18:19:25 2013 +0000
committer Howard Hinnant <hhinnant@apple.com> Sat Apr 13 18:19:25 2013 +0000
tree b1f643ca194e9801a40963134fa437cf5d4993ff
parent a5733b3ad3695aed8f7676165dabe3da7f49d78c

Set failbit when strtold sets errno to ERANGE when parsing floating point values.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@179461 91177308-0d34-0410-b5e6-96231b3b80d8

include/locale

diff --git a/include/locale b/include/locale
index 05020e1..2e0d0f9 100644
--- a/include/locale
+++ b/include/locale
@@ -906,13 +906,20 @@
 {
     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;