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: #include <stddef.h>
   13: 
   14: void
   15: bcopy (const void *src, void *dest, size_t len)
   16: {
   17:   if (dest < src)
   18:     {
   19:       const char *firsts = (const char *) src;
   20:       char *firstd = (char *) dest;
   21:       while (len--)
   22:         *firstd++ = *firsts++;
   23:     }
   24:   else
   25:     {
   26:       const char *lasts = (const char *)src + (len-1);
   27:       char *lastd = (char *)dest + (len-1);
   28:       while (len--)
   29:         *lastd-- = *lasts--;
   30:     }
   31: }