| 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 | } |