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/*

 * Copyright (c) 2007 Eirik A. Nygaard <eirikald@pvv.ntnu.no>

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 *

 */

#ifndef _HASH_H_

#define _HASH_H_

typedef unsigned long hash;

typedef hash (*hash_hash)(const void *key);

typedef hash (*hash_cmp)(const void *k1, const void *k2);

struct hash_bucket {

        void *key;

        void *value;

        hash hash;

} *h_bucket;

typedef struct {

        struct hash_bucket *h_bucket;

        hash_hash h_hash;

        hash_cmp h_cmp;

        unsigned long h_size, h_used;

        float h_threshold;

} hash_t;

hash_t *_hash_create(hash_cmp cmp, hash_hash hash, unsigned long size, float threshold);

void hash_destroy(hash_t *h, int freevalue);

int _hash_insert(hash_t *h, void *key, void *value);

int _hash_remove(hash_t *h, void *key, int freevalue);

void *_hash_lookup(hash_t *h, const void *key);

#define HASH_DECLARE(name, hcmp, hhash, keytype, valuetype) \

hash_t * name ## _create (hash size, float threshold) { return _hash_create((hash_cmp)hcmp, (hash_hash)hhash, size, threshold); } \

int name ## _insert (hash_t *h, keytype * key, valuetype * value) { return _hash_insert(h, key, value); } \

int name ## _remove (hash_t *h, keytype * key, int freevalue) { return _hash_remove(h, key, freevalue); } \

valuetype * name ## _lookup (hash_t *h, const keytype * key) { return _hash_lookup(h, key); }

#define HASH_DEFINE(name, hcmp, hhash, keytype, valuetype) \

hash_t * name ## _create (hash size, float threshold); \

int name ## _insert (hash_t *h, keytype * key, valuetype * value); \

int name ## _remove (hash_t *h, keytype * key, int freevalue); \

valuetype * name ## _lookup (hash_t *h, const keytype * key);

#endif /* _HASH_H_ */