usr.bin/m4/lib/ohash_enum.c

   1 /* $OpenBSD: ohash_enum.c,v 1.3 2004/06/22 20:00:16 espie Exp $ */
   2 /* ex:ts=8 sw=4:
   3  */
   4
   5 /* Copyright (c) 1999, 2004 Marc Espie <espie@openbsd.org>
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 #include "ohash_int.h"
  21
  22 void *
  23 ohash_first(struct ohash *h, unsigned int *pos)
  24 {
  25         *pos = 0;
  26         return ohash_next(h, pos);
  27 }
  28
  29 void *
  30 ohash_next(struct ohash *h, unsigned int *pos)
  31 {
  32         for (; *pos < h->size; (*pos)++)
  33                 if (h->t[*pos].p != DELETED && h->t[*pos].p != NULL)
  34                         return __UNCONST(h->t[(*pos)++].p);
  35         return NULL;
  36 }