X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fmemmove.c;h=af8981358414436351221d091cbb50bd52943232;hb=d865c4403fc91d1f1ac95ba76febcee9f429bb97;hp=4ba2ba4cf2feafbc30fd0e9c5eb060f85653c02b;hpb=c0169638bd02098717cb23fbbca3bcc4e4caccf0;p=pdclib

diff --git a/functions/string/memmove.c b/functions/string/memmove.c
index 4ba2ba4..af89813 100644
--- a/functions/string/memmove.c
+++ b/functions/string/memmove.c
@@ -1,7 +1,3 @@
-/* $Id$ */
-
-/* Release $Name$ */
-
 /* memmove( void *, const void *, size_t )
 
    This file is part of the Public Domain C Library (PDCLib).
@@ -10,11 +6,13 @@
 
 #include <string.h>
 
+#ifndef REGTEST
+
 void * memmove( void * s1, const void * s2, size_t n )
 {
     char * dest = (char *) s1;
     const char * src = (const char *) s2;
-    if ( dest < src )
+    if ( dest <= src )
     {
         while ( n-- )
         {
@@ -27,10 +25,28 @@ void * memmove( void * s1, const void * s2, size_t n )
         dest += n;
         while ( n-- )
         {
-            *dest-- = *src--;
+            *--dest = *--src;
         }
     }
     return s1;
 }
 
-#warning Test driver missing.
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    char s[] = "xxxxabcde";
+    TESTCASE( memmove( s, s + 4, 5 ) == s );
+    TESTCASE( s[0] == 'a' );
+    TESTCASE( s[4] == 'e' );
+    TESTCASE( s[5] == 'b' );
+    TESTCASE( memmove( s + 4, s, 5 ) == s + 4 );
+    TESTCASE( s[4] == 'a' );
+    return TEST_RESULTS;
+}
+
+#endif