tommytrie.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 __TOMMYTRIE_H
#define __TOMMYTRIE_H
 
#include "tommytypes.h"
#include "tommyalloc.h"
 
/******************************************************************************/
/* trie */
 
#define TOMMY_TRIE_BIT 32
 
#define TOMMY_TRIE_TREE_MAX (64 / sizeof(void*))
 
#define TOMMY_TRIE_BLOCK_SIZE (TOMMY_TRIE_TREE_MAX * sizeof(void*))
 
#define TOMMY_TRIE_TREE_BIT TOMMY_ILOG2(TOMMY_TRIE_TREE_MAX)
 
#define TOMMY_TRIE_BUCKET_BIT ((TOMMY_TRIE_BIT % TOMMY_TRIE_TREE_BIT) + TOMMY_TRIE_TREE_BIT)
 
#define TOMMY_TRIE_BUCKET_MAX (1 << TOMMY_TRIE_BUCKET_BIT)
 
typedef tommy_node tommy_trie_node;
 
typedef struct tommy_trie_struct {
        tommy_trie_node* bucket[TOMMY_TRIE_BUCKET_MAX]; 
        tommy_size_t count; 
        tommy_size_t node_count; 
        tommy_allocator* alloc; 
} tommy_trie;
 
TOMMY_API void tommy_trie_init(tommy_trie* trie, tommy_allocator* alloc);
 
TOMMY_API void tommy_trie_insert(tommy_trie* trie, tommy_trie_node* node, void* data, tommy_key_t key);
 
TOMMY_API void* tommy_trie_remove(tommy_trie* trie, tommy_key_t key);
 
TOMMY_API tommy_trie_node* tommy_trie_bucket(tommy_trie* trie, tommy_key_t key);
 
tommy_inline void* tommy_trie_search(tommy_trie* trie, tommy_key_t key)
{
        tommy_trie_node* i = tommy_trie_bucket(trie, key);
 
        if (!i)
                return 0;
 
        return i->data;
}
 
TOMMY_API void* tommy_trie_remove_existing(tommy_trie* trie, tommy_trie_node* node);
 
tommy_inline tommy_size_t tommy_trie_count(tommy_trie* trie)
{
        return trie->count;
}
 
TOMMY_API tommy_size_t tommy_trie_memory_usage(tommy_trie* trie);
 
#endif