/*
 * netlink/hashtable.h       Netlink hashtable Utilities
 *
 *      This library is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU Lesser General Public
 *      License as published by the Free Software Foundation version 2.1
 *      of the License.
 *
 * Copyright (c) 2012 Cumulus Networks, Inc
 */

#ifndef NETLINK_HASHTABLE_H_
#define NETLINK_HASHTABLE_H_

#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct nl_hash_node {
    uint32_t			key;
    uint32_t			key_size;
    struct nl_object *		obj;
    struct nl_hash_node *	next;
} nl_hash_node_t;

typedef struct nl_hash_table {
    int 			size;
    nl_hash_node_t **		nodes;
} nl_hash_table_t;

/* Default hash table size */
#define NL_MAX_HASH_ENTRIES 1024

/* Access Functions */
extern nl_hash_table_t *	nl_hash_table_alloc(int size);
extern void 			nl_hash_table_free(nl_hash_table_t *ht);

extern int			nl_hash_table_add(nl_hash_table_t *ht,
						  struct nl_object *obj);
extern int			nl_hash_table_del(nl_hash_table_t *ht,
						  struct nl_object *obj);

extern struct nl_object *	nl_hash_table_lookup(nl_hash_table_t *ht,
						     struct nl_object *obj);
extern uint32_t 		nl_hash(void *k, size_t length,
					uint32_t initval);

#ifdef __cplusplus
}
#endif

#endif /* NETLINK_HASHTABLE_H_ */