1/* $NetBSD$ */ 2 3/* 4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. 5 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. 6 * 7 * This file is part of the device-mapper userspace tools. 8 * 9 * This copyrighted material is made available to anyone wishing to use, 10 * modify, copy, or redistribute it subject to the terms and conditions 11 * of the GNU Lesser General Public License v.2.1. 12 * 13 * You should have received a copy of the GNU Lesser General Public License 14 * along with this program; if not, write to the Free Software Foundation, 15 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 16 */ 17 18#ifndef _DM_HASH_H 19#define _DM_HASH_H 20 21struct hash_table; 22struct hash_node; 23 24typedef void (*iterate_fn) (void *data); 25 26struct hash_table *hash_create(unsigned size_hint); 27void hash_destroy(struct hash_table *t); 28void hash_wipe(struct hash_table *t); 29 30void *hash_lookup(struct hash_table *t, const char *key); 31int hash_insert(struct hash_table *t, const char *key, void *data); 32void hash_remove(struct hash_table *t, const char *key); 33 34void *hash_lookup_binary(struct hash_table *t, const char *key, uint32_t len); 35int hash_insert_binary(struct hash_table *t, const char *key, uint32_t len, 36 void *data); 37void hash_remove_binary(struct hash_table *t, const char *key, uint32_t len); 38 39unsigned hash_get_num_entries(struct hash_table *t); 40void hash_iter(struct hash_table *t, iterate_fn f); 41 42char *hash_get_key(struct hash_table *t, struct hash_node *n); 43void *hash_get_data(struct hash_table *t, struct hash_node *n); 44struct hash_node *hash_get_first(struct hash_table *t); 45struct hash_node *hash_get_next(struct hash_table *t, struct hash_node *n); 46 47#define hash_iterate(v, h) \ 48 for (v = hash_get_first(h); v; \ 49 v = hash_get_next(h, v)) 50 51#endif 52