X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fmemcmp.c;h=cb1db581d15fec92093c15ef1cc26da5d9b0f3bc;hb=d9dcf16664c81809258992e1653ecb68c8079974;hp=fdda92ce7689a8aa6aaaf7c125587d79c1a167b2;hpb=a73a16db5ba6d16af1a8025eebdeed0ea273d682;p=pdclib.old

diff --git a/functions/string/memcmp.c b/functions/string/memcmp.c
index fdda92c..cb1db58 100644
--- a/functions/string/memcmp.c
+++ b/functions/string/memcmp.c
@@ -1,24 +1,43 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
+
+/* 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 * src_1, const void * src_2, size_t n )
+#ifndef REGTEST
+
+int memcmp( const void * s1, const void * s2, size_t n )
 {
-    const unsigned char * p1 = (const unsigned char *) src_1;
-    const unsigned char * p2 = (const unsigned char *) src_2;
+    const unsigned char * p1 = (const unsigned char *) s1;
+    const unsigned char * p2 = (const unsigned char *) s2;
     while ( n-- )
     {
         if ( *p1 != *p2 )
         {
-            return *p2 - *p1;
+            return *p1 - *p2;
         }
         ++p1;
         ++p2;
     }
     return 0;
 }
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    char const xxxxx[] = "xxxxx";
+    TESTCASE( memcmp( abcde, abcdx, 5 ) < 0 );
+    TESTCASE( memcmp( abcde, abcdx, 4 ) == 0 );
+    TESTCASE( memcmp( abcde, xxxxx, 0 ) == 0 );
+    TESTCASE( memcmp( xxxxx, abcde, 1 ) > 0 );
+    return 0;
+}
+#endif