libgcc/memmove.c

   1 /* Public domain.  */
   2 #include <stddef.h>
   3
   4 void *
   5 memmove (void *dest, const void *src, size_t len)
   6 {
   7   char *d = dest;
   8   const char *s = src;
   9   if (d < s)
  10     while (len--)
  11       *d++ = *s++;
  12   else
  13     {
  14       char *lasts = s + (len-1);
  15       char *lastd = d + (len-1);
  16       while (len--)
  17         *lastd-- = *lasts--;
  18     }
  19   return dest;
  20 }