msvcrt: Add _mbsncat_l implementation.

dlls/msvcr100/msvcr100.spec

@@ -1146,7 +1146,7 @@
 @ stub _mbsnbset_s
 @ stub _mbsnbset_s_l
 @ cdecl _mbsncat(str str long)
-@ stub _mbsncat_l
+@ cdecl _mbsncat_l(str str long ptr)
 @ stub _mbsncat_s
 @ stub _mbsncat_s_l
 @ cdecl _mbsnccnt(str long)

dlls/msvcr110/msvcr110.spec

@@ -1503,7 +1503,7 @@
 @ stub _mbsnbset_s
 @ stub _mbsnbset_s_l
 @ cdecl _mbsncat(str str long)
-@ stub _mbsncat_l
+@ cdecl _mbsncat_l(str str long ptr)
 @ stub _mbsncat_s
 @ stub _mbsncat_s_l
 @ cdecl _mbsnccnt(str long)

dlls/msvcr120/msvcr120.spec

@@ -1514,7 +1514,7 @@
 @ stub _mbsnbset_s
 @ stub _mbsnbset_s_l
 @ cdecl _mbsncat(str str long)
-@ stub _mbsncat_l
+@ cdecl _mbsncat_l(str str long ptr)
 @ stub _mbsncat_s
 @ stub _mbsncat_s_l
 @ cdecl _mbsnccnt(str long)

dlls/msvcr80/msvcr80.spec

@@ -818,7 +818,7 @@
 @ stub _mbsnbset_s
 @ stub _mbsnbset_s_l
 @ cdecl _mbsncat(str str long)
-@ stub _mbsncat_l
+@ cdecl _mbsncat_l(str str long ptr)
 @ stub _mbsncat_s
 @ stub _mbsncat_s_l
 @ cdecl _mbsnccnt(str long)

dlls/msvcr90/msvcr90.spec

@@ -796,7 +796,7 @@
 @ stub _mbsnbset_s
 @ stub _mbsnbset_s_l
 @ cdecl _mbsncat(str str long)
-@ stub _mbsncat_l
+@ cdecl _mbsncat_l(str str long ptr)
 @ stub _mbsncat_s
 @ stub _mbsncat_s_l
 @ cdecl _mbsnccnt(str long)

dlls/msvcrt/mbcs.c

@@ -2457,30 +2457,50 @@ int CDECL _mbsnbcat_s(unsigned char *dst, size_t size, const unsigned char *src,
 }
 
 /*********************************************************************
- *		_mbsncat(MSVCRT.@)
+ *		_mbsncat_l(MSVCRT.@)
  */
-unsigned char* CDECL _mbsncat(unsigned char* dst, const unsigned char* src, size_t len)
+unsigned char* CDECL _mbsncat_l(unsigned char* dst, const unsigned char* src, size_t len, _locale_t locale)
 {
-  if(get_mbcinfo()->ismbcodepage)
-  {
-    unsigned char *res = dst;
-    while (*dst)
-    {
-      if (_ismbblead(*dst++))
-        dst++;
-    }
-    while (*src && len--)
+    pthreadmbcinfo mbcinfo;
+
+    if (!len)
+        return dst;
+
+    if (!MSVCRT_CHECK_PMT(dst && src))
+        return NULL;
+
+    if (locale)
+        mbcinfo = locale->mbcinfo;
+    else
+        mbcinfo = get_mbcinfo();
+
+    if (mbcinfo->ismbcodepage)
     {
-      *dst++ = *src;
-      if(_ismbblead(*src++))
-        *dst++ = *src++;
+        unsigned char *res = dst;
+        while (*dst)
+        {
+            if (_ismbblead_l(*dst++, locale))
+                dst++;
+        }
+        while (*src && len--)
+        {
+            *dst++ = *src;
+            if (_ismbblead_l(*src++, locale))
+                *dst++ = *src++;
+        }
+        *dst = '\0';
+        return res;
     }
-    *dst = '\0';
-    return res;
-  }
-  return u_strncat(dst, src, len); /* ASCII CP */
+    return u_strncat(dst, src, len); /* ASCII CP */
 }
 
+/*********************************************************************
+ *		_mbsncat(MSVCRT.@)
+ */
+unsigned char* CDECL _mbsncat(unsigned char* dst, const unsigned char* src, size_t len)
+{
+    return _mbsncat_l(dst, src, len, NULL);
+}
 
 /*********************************************************************
  *              _mbslwr_l(MSVCRT.@)

dlls/msvcrt/msvcrt.spec

@@ -767,7 +767,7 @@
 # stub _mbsnbset_s(ptr long long long)
 # stub _mbsnbset_s_l(ptr long long long ptr)
 @ cdecl _mbsncat(str str long)
-# stub _mbsncat_l(str str long ptr)
+@ cdecl _mbsncat_l(str str long ptr)
 # stub _mbsncat_s(str long str long)
 # stub _mbsncat_s_l(str long str long ptr)
 @ cdecl _mbsnccnt(str long)

dlls/ucrtbase/ucrtbase.spec

@@ -662,7 +662,7 @@
 @ stub _mbsnbset_s
 @ stub _mbsnbset_s_l
 @ cdecl _mbsncat(str str long)
-@ stub _mbsncat_l
+@ cdecl _mbsncat_l(str str long ptr)
 @ stub _mbsncat_s
 @ stub _mbsncat_s_l
 @ cdecl _mbsnccnt(str long)
@@ -1231,7 +1231,7 @@
 @ stub _o__mbsnbset_s
 @ stub _o__mbsnbset_s_l
 @ cdecl _o__mbsncat(str str long) _mbsncat
-@ stub _o__mbsncat_l
+@ cdecl _o__mbsncat_l(str str long ptr) _mbsncat_l
 @ stub _o__mbsncat_s
 @ stub _o__mbsncat_s_l
 @ cdecl _o__mbsnccnt(str long) _mbsnccnt