1 rizwank 1.1 /* memmove.c -- copy memory.
 2                Copy LENGTH bytes from SOURCE to DEST.  Does not null-terminate.
 3                In the public domain.
 4                By David MacKenzie <djm@gnu.ai.mit.edu>.  */
 5             
 6             #ifdef HAVE_CONFIG_H
 7             #include <config.h>
 8             #endif
 9             
10             void
11             memmove (dest, source, length)
12                  char *dest;
13                  const char *source;
14                  unsigned length;
15             {
16               if (source < dest)
17                 /* Moving from low mem to hi mem; start at end.  */
18                 for (source += length, dest += length; length; --length)
19                   *--dest = *--source;
20               else if (source != dest)
21                 /* Moving from hi mem to low mem; start at beginning.  */
22 rizwank 1.1     for (; length; --length)
23                   *dest++ = *source++;
24             }