Commit | Line | Data |
---|---|---|
252b5132 RH |
1 | /* bcopy -- copy memory regions of arbitary length |
2 | ||
39423523 | 3 | @deftypefn Supplemental void bcopy (char *@var{in}, char *@var{out}, int @var{length}) |
252b5132 | 4 | |
39423523 DD |
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. | |
252b5132 | 7 | |
39423523 | 8 | @end deftypefn |
252b5132 RH |
9 | |
10 | */ | |
11 | ||
12 | void | |
9334f9c6 | 13 | bcopy (register char *src, register char *dest, int len) |
252b5132 RH |
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 | } |