Add explicit casts to unsigned char before calling ctype functions.
Fixes the value range on platforms with signed char.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@180940 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/locale.cpp b/src/locale.cpp
index 49c1cf2..c740a51 100644
--- a/src/locale.cpp
+++ b/src/locale.cpp
@@ -1068,28 +1068,28 @@
char
ctype_byname<char>::do_toupper(char_type c) const
{
- return static_cast<char>(toupper_l(c, __l));
+ return static_cast<char>(toupper_l(static_cast<unsigned char>(c), __l));
}
const char*
ctype_byname<char>::do_toupper(char_type* low, const char_type* high) const
{
for (; low != high; ++low)
- *low = static_cast<char>(toupper_l(*low, __l));
+ *low = static_cast<char>(toupper_l(static_cast<unsigned char>(*low), __l));
return low;
}
char
ctype_byname<char>::do_tolower(char_type c) const
{
- return static_cast<char>(tolower_l(c, __l));
+ return static_cast<char>(tolower_l(static_cast<unsigned char>(c), __l));
}
const char*
ctype_byname<char>::do_tolower(char_type* low, const char_type* high) const
{
for (; low != high; ++low)
- *low = static_cast<char>(tolower_l(*low, __l));
+ *low = static_cast<char>(tolower_l(static_cast<unsigned char>(*low), __l));
return low;
}