lib/bcopy.c

   1 /* bcopy.c -- copy memory.
   2    Copy LENGTH bytes from SOURCE to DEST.  Does not null-terminate.
   3    In the public domain.
   4    By David MacKenzie <djm@gnu.ai.mit.edu>.  */
   5
   6 void
   7 bcopy (source, dest, length)
   8      char *source, *dest;
   9      unsigned length;
  10 {
  11   if (source < dest)
  12     /* Moving from low mem to hi mem; start at end.  */
  13     for (source += length, dest += length; length; --length)
  14       *--dest = *--source;
  15   else if (source != dest)
  16     /* Moving from hi mem to low mem; start at beginning.  */
  17     for (; length; --length)
  18       *dest++ = *source++;
  19 }