X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fmemmove.c;h=3bb889532ed96a3898004b2b130678d5b4f9c1f5;hb=12e17136786afb1775c9dc946cbe41f5e230c24a;hp=b46a15ac564df629543b63a785f90fb4d26cc666;hpb=41afb7a0762978ee57d1a8d6223e82e73f2acb9b;p=pdclib.old

diff --git a/functions/string/memmove.c b/functions/string/memmove.c
index b46a15a..3bb8895 100644
--- a/functions/string/memmove.c
+++ b/functions/string/memmove.c
@@ -10,11 +10,13 @@
 
 #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-- )
         {
@@ -27,8 +29,26 @@ void * memmove( void * s1, const void * s2, size_t n )
         dest += n;
         while ( n-- )
         {
-            *dest-- = *src--;
+            *--dest = *--src;
         }
     }
     return s1;
 }
+
+#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