libiberty/bcopy.c

   1 /* bcopy -- copy memory regions of arbitary length
   2
   3 @deftypefn Supplemental void bcopy (char *@var{in}, char *@var{out}, int @var{length})
   4
   5 Copies @var{length} bytes from memory region @var{in} to region
   6 @var{out}.  The use of @code{bcopy} is deprecated in new programs.
   7
   8 @end deftypefn
   9
  10 */
  11
  12 void
  13 bcopy (src, dest, len)
  14   register char *src, *dest;
  15   int len;
  16 {
  17   if (dest < src)
  18     while (len--)
  19       *dest++ = *src++;
  20   else
  21     {
  22       char *lasts = src + (len-1);
  23       char *lastd = dest + (len-1);
  24       while (len--)
  25         *(char *)lastd-- = *(char *)lasts--;
  26     }
  27 }