[vlc-devel] [PATCH] [RFC] vlc_fixups.h: add a uselocale implementation for win32

[Adrien Maglo]

This implementation comes from libcxx.
---
 include/vlc_fixups.h | 46 ++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 42 insertions(+), 4 deletions(-)

diff --git a/include/vlc_fixups.h b/include/vlc_fixups.h
index 6175a539bd..c45294d19e 100644
--- a/include/vlc_fixups.h
+++ b/include/vlc_fixups.h
@@ -320,10 +320,47 @@ void *aligned_alloc(size_t, size_t);
 
 /* locale.h */
 #ifndef HAVE_USELOCALE
-#define LC_ALL_MASK      0
-#define LC_NUMERIC_MASK  0
-#define LC_MESSAGES_MASK 0
-#define LC_GLOBAL_LOCALE ((locale_t)(uintptr_t)1)
+# if defined(_WIN32)
+#  include <xlocinfo.h> // _locale_t
+#  undef _UP // It conflicts with unique_ptr.h on MinGW...
+#  define locale_t _locale_t
+#  define LC_COLLATE_MASK _M_COLLATE
+#  define LC_CTYPE_MASK _M_CTYPE
+#  define LC_MONETARY_MASK _M_MONETARY
+#  define LC_NUMERIC_MASK _M_NUMERIC
+#  define LC_TIME_MASK _M_TIME
+#  define LC_MESSAGES_MASK _M_MESSAGES
+#  define LC_ALL_MASK (  LC_COLLATE_MASK \
+                       | LC_CTYPE_MASK \
+                       | LC_MESSAGES_MASK \
+                       | LC_MONETARY_MASK \
+                       | LC_NUMERIC_MASK \
+                       | LC_TIME_MASK )
+#  define freelocale _free_locale
+
+// Base is not used...
+static inline locale_t newlocale( int mask, const char * locale, locale_t base )
+{
+    (void)base;
+    return _create_locale( mask, locale );
+}
+
+static inline locale_t uselocale( locale_t newloc )
+{
+    locale_t old_locale = _get_current_locale();
+    // uselocale sets the thread's locale by definition, so unconditionally use thread-local locale
+    _configthreadlocale( _ENABLE_PER_THREAD_LOCALE );
+    // uselocale sets all categories
+    setlocale( LC_ALL, newloc->locinfo->lc_category[LC_ALL].locale );
+    // uselocale returns the old locale_t
+    return old_locale;            
+}
+
+# else
+#  define LC_ALL_MASK      0
+#  define LC_NUMERIC_MASK  0
+#  define LC_MESSAGES_MASK 0
+#  define LC_GLOBAL_LOCALE ((locale_t)(uintptr_t)1)
 typedef void *locale_t;
 static inline locale_t uselocale(locale_t loc)
 {
@@ -339,6 +376,7 @@ static inline locale_t newlocale(int mask, const char * locale, locale_t base)
     (void)mask; (void)locale; (void)base;
     return NULL;
 }
+# endif
 #endif
 
 #if !defined (HAVE_STATIC_ASSERT) && !defined(__cpp_static_assert)
-- 
2.14.1