From 7b3495ac9316c1cd85480c6c1e5f18850fa6a894 Mon Sep 17 00:00:00 2001
From: Mike McCormack <mike_mccormack@start.com.au>
Date: Thu, 9 Aug 2001 21:37:19 +0000
Subject: [PATCH] Implemented multibyte string reverse.

---
 dlls/msvcrt/mbcs.c      | 48 +++++++++++++++++++++++++++++++++++++++++
 dlls/msvcrt/msvcrt.spec |  2 +-
 2 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/dlls/msvcrt/mbcs.c b/dlls/msvcrt/mbcs.c
index 024b701422c..f144e9fa11f 100644
--- a/dlls/msvcrt/mbcs.c
+++ b/dlls/msvcrt/mbcs.c
@@ -602,3 +602,51 @@ int _ismbcspace( unsigned int c)
   FIXME("%c\n",c);
   return 0;
 }
+
+/*********************************************************************
+ *              _mbsrev (MSVCRT.@)
+ */
+char *_mbsrev(char *str)
+{
+    int i, len = _mbslen(str);
+    char *p, *temp=MSVCRT_malloc(len*2);
+
+    if(!temp)
+        return str;
+
+    /* unpack multibyte string to temp buffer */
+    p=str;
+    for(i=0; i<len; i++)
+    {
+        if (MSVCRT_isleadbyte(*p))
+        {
+            temp[i*2]=*p++;
+            temp[i*2+1]=*p++;
+        }
+        else
+        {
+            temp[i*2]=*p++;
+            temp[i*2+1]=0;
+        }
+    }
+
+    /* repack it in the reverse order */
+    p=str;
+    for(i=len-1; i>=0; i--)
+    {
+        if(MSVCRT_isleadbyte(temp[i*2]))
+        {
+            *p++=temp[i*2];
+            *p++=temp[i*2+1];
+        }
+        else
+        {
+            *p++=temp[i*2];
+        }
+    }
+
+    MSVCRT_free(temp);
+
+    return str;
+}
+
diff --git a/dlls/msvcrt/msvcrt.spec b/dlls/msvcrt/msvcrt.spec
index d8b4a676742..3994add2fda 100644
--- a/dlls/msvcrt/msvcrt.spec
+++ b/dlls/msvcrt/msvcrt.spec
@@ -385,7 +385,7 @@ debug_channels (msvcrt)
 @ cdecl _mbsnset(str long long) _mbsnset
 @ stub _mbspbrk #(str str)
 @ cdecl _mbsrchr(str long) _mbsrchr
-@ stub _mbsrev #(str)
+@ cdecl _mbsrev(str) _mbsrev
 @ cdecl _mbsset(str long) _mbsset
 @ cdecl _mbsspn(str str) _mbsspn
 @ stub _mbsspnp #(str str)