X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fmemcmp.c;h=8a4a070e0127d25d94ef41f3d58e607487a2639e;hb=c0169638bd02098717cb23fbbca3bcc4e4caccf0;hp=c16d50a0f5e5fe7e4f988bf84263f767af9800f2;hpb=0a5395faab237ba9008352b0f4bee9659bbd3d5f;p=pdclib

diff --git a/functions/string/memcmp.c b/functions/string/memcmp.c
index c16d50a..8a4a070 100644
--- a/functions/string/memcmp.c
+++ b/functions/string/memcmp.c
@@ -1,26 +1,29 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
 
-int memcmp( const void * s1, const void * s2, size_t n ) { /* TODO */ };
+/* Release $Name$ */
 
-/* PDPC code - unreviewed
+/* memcmp( const void *, const void *, size_t )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <string.h>
+
+int memcmp( const void * s1, const void * s2, size_t n )
 {
-    const unsigned char *p1;
-    const unsigned char *p2;
-    size_t x = 0;
-    
-    p1 = (const unsigned char *)s1;
-    p2 = (const unsigned char *)s2;
-    while (x < n)
+    const unsigned char * p1 = (const unsigned char *) s1;
+    const unsigned char * p2 = (const unsigned char *) s2;
+    while ( n-- )
     {
-        if (p1[x] < p2[x]) return (-1);
-        else if (p1[x] > p2[x]) return (1);
-        x++;
+        if ( *p1 != *p2 )
+        {
+            return *p2 - *p1;
+        }
+        ++p1;
+        ++p2;
     }
-    return (0);
+    return 0;
 }
-*/
+
+#warning Test driver missing.