[thirdparty/gcc.git] / libiberty / bcopy.c

/* bcopy -- copy memory regions of arbitary length

@deftypefn Supplemental void bcopy (char *@var{in}, char *@var{out}, int @var{length})

Copies @var{length} bytes from memory region @var{in} to region
@var{out}.  The use of @code{bcopy} is deprecated in new programs.

@end deftypefn

*/

void
bcopy (src, dest, len)
  register char *src, *dest;
  int len;
{
  if (dest < src)
    while (len--)
      *dest++ = *src++;
  else
    {
      char *lasts = src + (len-1);
      char *lastd = dest + (len-1);
      while (len--)
        *(char *)lastd-- = *(char *)lasts--;
    }
}
Commit	Line	Data
6599da04 JM	1	/* bcopy -- copy memory regions of arbitary length
6599da04 JM	2
aaa5f039	3	@deftypefn Supplemental void bcopy (char @var{in}, char @var{out}, int @var{length})
6599da04	4
aaa5f039 DD	5	Copies @var{length} bytes from memory region @var{in} to region
aaa5f039 DD	6	@var{out}. The use of @code{bcopy} is deprecated in new programs.
6599da04	7
aaa5f039	8	@end deftypefn
6599da04 JM	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	}