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 (register char *src, register char *dest, int len)
  14 {
  15   if (dest < src)
  16     while (len--)
  17       *dest++ = *src++;
  18   else
  19     {
  20       char *lasts = src + (len-1);
  21       char *lastd = dest + (len-1);
  22       while (len--)
  23         *(char *)lastd-- = *(char *)lasts--;
  24     }
  25 }