usr.bin/m4/lib/ohash_init.c

   1 /* $OpenBSD: ohash_init.c,v 1.2 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_init(struct ohash *h, unsigned int size, struct ohash_info *info)
  24 {
  25         h->size = 1UL << size;
  26         if (h->size < MINSIZE)
  27                 h->size = MINSIZE;
  28 #ifdef STATS_HASH
  29         STAT_HASH_CREATION++;
  30         STAT_HASH_SIZE += h->size;
  31 #endif
  32         /* Copy info so that caller may free it.  */
  33         h->info.key_offset = info->key_offset;
  34         h->info.halloc = info->halloc;
  35         h->info.hfree = info->hfree;
  36         h->info.alloc = info->alloc;
  37         h->info.data = info->data;
  38         h->t = (h->info.halloc)(sizeof(struct _ohash_record) * h->size,
  39             h->info.data);
  40         h->total = h->deleted = 0;
  41 }