bcopy.c revision 89858
1/* bcopy -- copy memory regions of arbitary length 2 3@deftypefn Supplemental void bcopy (char *@var{in}, char *@var{out}, int @var{length}) 4 5Copies @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 12void 13bcopy (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} 28