From 6f0342cf2e4802f6d7948e1c5f59c41b4e25789e Mon Sep 17 00:00:00 2001
From: Sean Hunt <scshunt@csclub.uwaterloo.ca>
Date: Sat, 9 Jul 2011 03:40:04 +0000
Subject: [PATCH] Don't assume that wctype produces a nice mask on all
 platforms. On glibc, for instance, it's a const char *.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@134787 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/__config |  4 ++++
 src/locale.cpp   | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/include/__config b/include/__config
index 239f0a22c..a5afbcad7 100644
--- a/include/__config
+++ b/include/__config
@@ -289,4 +289,8 @@ template <unsigned> struct __static_assert_check {};
 #define _LIBCPP_STABLE_APPLE_ABI
 #endif
 
+#ifdef __APPLE__
+#define _LIBCPP_WCTYPE_IS_MASK
+#endif
+
 #endif  // _LIBCPP_CONFIG
diff --git a/src/locale.cpp b/src/locale.cpp
index 63f54294a..561fd62e3 100644
--- a/src/locale.cpp
+++ b/src/locale.cpp
@@ -1114,7 +1114,21 @@ ctype_byname<wchar_t>::~ctype_byname()
 bool
 ctype_byname<wchar_t>::do_is(mask m, char_type c) const
 {
+#ifdef _LIBCPP_WCTYPE_IS_MASK
     return static_cast<bool>(iswctype_l(c, m, __l));
+#else
+    if (m & space && !iswspace_l(c, __l)) return false;
+    if (m & print && !iswprint_l(c, __l)) return false;
+    if (m & cntrl && !iswcntrl_l(c, __l)) return false;
+    if (m & upper && !iswupper_l(c, __l)) return false;
+    if (m & lower && !iswlower_l(c, __l)) return false;
+    if (m & alpha && !iswalpha_l(c, __l)) return false;
+    if (m & digit && !iswdigit_l(c, __l)) return false;
+    if (m & punct && !iswpunct_l(c, __l)) return false;
+    if (m & xdigit && !iswxdigit_l(c, __l)) return false;
+    if (m & blank && !iswblank_l(c, __l)) return false;
+    return true;
+#endif
 }
 
 const wchar_t*
@@ -1154,8 +1168,24 @@ const wchar_t*
 ctype_byname<wchar_t>::do_scan_is(mask m, const char_type* low, const char_type* high) const
 {
     for (; low != high; ++low)
+    {
+#ifdef _LIBCPP_WCTYPE_IS_MASK
         if (iswctype_l(*low, m, __l))
             break;
+#else
+        if (m & space && !iswspace_l(*low, __l)) continue;
+        if (m & print && !iswprint_l(*low, __l)) continue;
+        if (m & cntrl && !iswcntrl_l(*low, __l)) continue;
+        if (m & upper && !iswupper_l(*low, __l)) continue;
+        if (m & lower && !iswlower_l(*low, __l)) continue;
+        if (m & alpha && !iswalpha_l(*low, __l)) continue;
+        if (m & digit && !iswdigit_l(*low, __l)) continue;
+        if (m & punct && !iswpunct_l(*low, __l)) continue;
+        if (m & xdigit && !iswxdigit_l(*low, __l)) continue;
+        if (m & blank && !iswblank_l(*low, __l)) continue;
+        break;
+#endif
+    }
     return low;
 }
 
@@ -1163,8 +1193,24 @@ const wchar_t*
 ctype_byname<wchar_t>::do_scan_not(mask m, const char_type* low, const char_type* high) const
 {
     for (; low != high; ++low)
+    {
+#ifdef _LIBCPP_WCTYPE_IS_MASK
         if (!iswctype_l(*low, m, __l))
             break;
+#else
+        if (m & space && iswspace_l(*low, __l)) continue;
+        if (m & print && iswprint_l(*low, __l)) continue;
+        if (m & cntrl && iswcntrl_l(*low, __l)) continue;
+        if (m & upper && iswupper_l(*low, __l)) continue;
+        if (m & lower && iswlower_l(*low, __l)) continue;
+        if (m & alpha && iswalpha_l(*low, __l)) continue;
+        if (m & digit && iswdigit_l(*low, __l)) continue;
+        if (m & punct && iswpunct_l(*low, __l)) continue;
+        if (m & xdigit && iswxdigit_l(*low, __l)) continue;
+        if (m & blank && iswblank_l(*low, __l)) continue;
+        break;
+#endif
+    }
     return low;
 }