msvcrt: Add _mbsnset_l implementation.

dlls/msvcr100/msvcr100.spec

@@ -1170,7 +1170,7 @@
 @ cdecl _mbsnlen(str long)
 @ cdecl _mbsnlen_l(str long ptr)
 @ cdecl _mbsnset(ptr long long)
-@ stub _mbsnset_l
+@ cdecl _mbsnset_l(ptr long long ptr)
 @ stub _mbsnset_s
 @ stub _mbsnset_s_l
 @ cdecl _mbspbrk(str str)

dlls/msvcr110/msvcr110.spec

@@ -1527,7 +1527,7 @@
 @ cdecl _mbsnlen(str long)
 @ cdecl _mbsnlen_l(str long ptr)
 @ cdecl _mbsnset(ptr long long)
-@ stub _mbsnset_l
+@ cdecl _mbsnset_l(ptr long long ptr)
 @ stub _mbsnset_s
 @ stub _mbsnset_s_l
 @ cdecl _mbspbrk(str str)

dlls/msvcr120/msvcr120.spec

@@ -1538,7 +1538,7 @@
 @ cdecl _mbsnlen(str long)
 @ cdecl _mbsnlen_l(str long ptr)
 @ cdecl _mbsnset(ptr long long)
-@ stub _mbsnset_l
+@ cdecl _mbsnset_l(ptr long long ptr)
 @ stub _mbsnset_s
 @ stub _mbsnset_s_l
 @ cdecl _mbspbrk(str str)

dlls/msvcr80/msvcr80.spec

@@ -842,7 +842,7 @@
 @ cdecl _mbsnlen(str long)
 @ cdecl _mbsnlen_l(str long ptr)
 @ cdecl _mbsnset(ptr long long)
-@ stub _mbsnset_l
+@ cdecl _mbsnset_l(ptr long long ptr)
 @ stub _mbsnset_s
 @ stub _mbsnset_s_l
 @ cdecl _mbspbrk(str str)

dlls/msvcr90/msvcr90.spec

@@ -820,7 +820,7 @@
 @ cdecl _mbsnlen(str long)
 @ cdecl _mbsnlen_l(str long ptr)
 @ cdecl _mbsnset(ptr long long)
-@ stub _mbsnset_l
+@ cdecl _mbsnset_l(ptr long long ptr)
 @ stub _mbsnset_s
 @ stub _mbsnset_s_l
 @ cdecl _mbspbrk(str str)

dlls/msvcrt/mbcs.c

@@ -2249,27 +2249,43 @@ unsigned char* CDECL _mbsnbset(unsigned char *str, unsigned int c, size_t len)
 /*********************************************************************
  *		_mbsnset(MSVCRT.@)
  */
-unsigned char* CDECL _mbsnset(unsigned char* str, unsigned int c, size_t len)
+unsigned char* CDECL _mbsnset_l(unsigned char* str, unsigned int c, size_t len, _locale_t locale)
 {
-  unsigned char *ret = str;
+    unsigned char *ret = str;
+    pthreadmbcinfo mbcinfo;
 
-  if(!len)
-    return ret;
+    if (!len)
+        return ret;
+    if (!MSVCRT_CHECK_PMT(str))
+        return NULL;
 
-  if(!get_mbcinfo()->ismbcodepage || c < 256)
-    return u__strnset(str, c, len); /* ASCII CP or SB char */
+    if (locale)
+        mbcinfo = locale->mbcinfo;
+    else
+        mbcinfo = get_mbcinfo();
 
-  c &= 0xffff; /* Strip high bits */
+    if (!mbcinfo->ismbcodepage || c < 256)
+        return u__strnset(str, c, len); /* ASCII CP or SB char */
 
-  while(str[0] && str[1] && len--)
-  {
-    *str++ = c >> 8;
-    *str++ = c & 0xff;
-  }
-  if(len && str[0])
-    str[0] = '\0'; /* FIXME: OK to shorten? */
+    c &= 0xffff; /* Strip high bits */
 
-  return ret;
+    while (str[0] && str[1] && len--)
+    {
+        *str++ = c >> 8;
+        *str++ = c & 0xff;
+    }
+    if (len && str[0])
+        str[0] = '\0'; /* FIXME: OK to shorten? */
+
+    return ret;
+}
+
+/*********************************************************************
+ *		_mbsnset(MSVCRT.@)
+ */
+unsigned char* CDECL _mbsnset(unsigned char* str, unsigned int c, size_t len)
+{
+    return _mbsnset_l(str, c, len, NULL);
 }
 
 /*********************************************************************

dlls/msvcrt/msvcrt.spec

@@ -791,7 +791,7 @@
 @ cdecl _mbsnlen(str long)
 @ cdecl _mbsnlen_l(str long ptr)
 @ cdecl _mbsnset(ptr long long)
-# stub _mbsnset_l(ptr long long ptr)
+@ cdecl _mbsnset_l(ptr long long ptr)
 # stub _mbsnset_s(ptr long long long)
 # stub _mbsnset_s_l(ptr long long long ptr)
 @ cdecl _mbspbrk(str str)

dlls/ucrtbase/ucrtbase.spec

@@ -686,7 +686,7 @@
 @ cdecl _mbsnlen(str long)
 @ cdecl _mbsnlen_l(str long ptr)
 @ cdecl _mbsnset(ptr long long)
-@ stub _mbsnset_l
+@ cdecl _mbsnset_l(ptr long long ptr)
 @ stub _mbsnset_s
 @ stub _mbsnset_s_l
 @ cdecl _mbspbrk(str str)
@@ -1255,7 +1255,7 @@
 @ cdecl _o__mbsnlen(str long) _mbsnlen
 @ cdecl _o__mbsnlen_l(str long ptr) _mbsnlen_l
 @ cdecl _o__mbsnset(ptr long long) _mbsnset
-@ stub _o__mbsnset_l
+@ cdecl _o__mbsnset_l(ptr long long ptr) _mbsnset_l
 @ stub _o__mbsnset_s
 @ stub _o__mbsnset_s_l
 @ cdecl _o__mbspbrk(str str) _mbspbrk