tommyhashtbl.h

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/*
 * Copyright (c) 2010, Andrea Mazzoleni. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __TOMMYHASHTBL_H
#define __TOMMYHASHTBL_H
 
#include "tommyhash.h"
 
/******************************************************************************/
/* hashtable */
 
typedef tommy_node tommy_hashtable_node;
 
typedef struct tommy_hashtable_struct {
        tommy_hashtable_node** bucket; 
        tommy_size_t bucket_max; 
        tommy_size_t bucket_mask; 
        tommy_size_t count; 
} tommy_hashtable;
 
TOMMY_API void tommy_hashtable_init(tommy_hashtable* hashtable, tommy_size_t bucket_max);
 
TOMMY_API void tommy_hashtable_done(tommy_hashtable* hashtable);
 
TOMMY_API void tommy_hashtable_insert(tommy_hashtable* hashtable, tommy_hashtable_node* node, void* data, tommy_hash_t hash);
 
TOMMY_API void* tommy_hashtable_remove(tommy_hashtable* hashtable, tommy_search_func* cmp, const void* cmp_arg, tommy_hash_t hash);
 
tommy_inline tommy_hashtable_node* tommy_hashtable_bucket(tommy_hashtable* hashtable, tommy_hash_t hash)
{
        return hashtable->bucket[hash & hashtable->bucket_mask];
}
 
tommy_inline void* tommy_hashtable_search(tommy_hashtable* hashtable, tommy_search_func* cmp, const void* cmp_arg, tommy_hash_t hash)
{
        tommy_hashtable_node* i = tommy_hashtable_bucket(hashtable, hash);
 
        while (i) {
                /* we first check if the hash matches, as in the same bucket we may have multiple hash values */
                if (i->index == hash && cmp(cmp_arg, i->data) == 0)
                        return i->data;
                i = i->next;
        }
        return 0;
}
 
TOMMY_API void* tommy_hashtable_remove_existing(tommy_hashtable* hashtable, tommy_hashtable_node* node);
 
TOMMY_API void tommy_hashtable_foreach(tommy_hashtable* hashtable, tommy_foreach_func* func);
 
TOMMY_API void tommy_hashtable_foreach_arg(tommy_hashtable* hashtable, tommy_foreach_arg_func* func, void* arg);
 
tommy_inline tommy_size_t tommy_hashtable_count(tommy_hashtable* hashtable)
{
        return hashtable->count;
}
 
TOMMY_API tommy_size_t tommy_hashtable_memory_usage(tommy_hashtable* hashtable);
 
#endif