Function save_to_hold_area

src/csplit.c:245–251

   These bytes will be retrieved later when another large buffer is read.  */

static void
save_to_hold_area (char *start, idx_t num)
{
  free (hold_area);
  hold_area = start;
  hold_count = num;
}

/* Read up to MAX_N_BYTES bytes from the input stream into DEST.
   Return the number of bytes read. */