[gschneider] 42363: - Fix mbslwr: increment pointer in both cases (prevents infinite loops) - Check for null character pointers, apply somewhat readable formatting - Add some useful header information See issue #4755 for more details.

Author: gschneider
Date: Mon Aug  3 18:15:40 2009
New Revision: 42363

URL: http://svn.reactos.org/svn/reactos?rev=42363&view=rev
Log:
- Fix mbslwr: increment pointer in both cases (prevents infinite loops)
- Check for null character pointers, apply somewhat readable formatting
- Add some useful header information
See issue #4755 for more details.

Modified:
    trunk/reactos/lib/sdk/crt/mbstring/mbslwr.c

Modified: trunk/reactos/lib/sdk/crt/mbstring/mbslwr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/sdk/crt/mbstring/mbslw…
==============================================================================
--- trunk/reactos/lib/sdk/crt/mbstring/mbslwr.c [iso-8859-1] (original)
+++ trunk/reactos/lib/sdk/crt/mbstring/mbslwr.c [iso-8859-1] Mon Aug  3 18:15:40 2009
@@ -1,12 +1,10 @@
 /*
  * COPYRIGHT:   See COPYING in the top level directory
  * PROJECT:     ReactOS system libraries
- * FILE:        lib/sdk/crt/mbstring/ismbpun.c
- * PURPOSE:
- * PROGRAMER:   
- * UPDATE HISTORY:
- *              05/30/08: Samuel Serapion adapted from PROJECT C Library
- *
+ * FILE:        lib/sdk/crt/mbstring/mbslwr.c
+ * PURPOSE:     Multibyte lowercase functions
+ * PROGRAMER:   Eric Kohl
+ *              Samuel Serapion, adapted from PROJECT C Library
  */
 
 #include <precomp.h>
@@ -33,14 +31,24 @@
  */
 unsigned char * _mbslwr(unsigned char *x)
 {
-    unsigned char  *y=x;
+    unsigned char *y=x;
 
-    while (*y) {
-        if (!_ismbblead(*y)) {
+    if (x == NULL)
+    {
+        return NULL;
+    }
+
+    while (*y) 
+    {
+        if (!_ismbblead(*y)) 
+        {
             *y = tolower(*y);
-	    } else {
-	        *y=_mbctolower(*(unsigned short *)y);
-	        y++;
+            y++;
+        } 
+        else
+        {
+            *y = _mbctolower(*(unsigned short *)y);
+            y++;
         }
     }
     return x;