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/*
* Copyright (c) 2016-2024 OARC, Inc.
* 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.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 HOLDER 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 __dnscap_hashtbl_h
#define __dnscap_hashtbl_h
#define HASHTBL_EARGS -1
#define HASHTBL_ENOMEM -2
typedef struct hashitem hashitem;
struct hashitem {
const void* key;
void* data;
hashitem* next;
};
typedef unsigned int (*hashkey_func)(const void* key);
typedef int (*hashkeycmp_func)(const void* a, const void* b);
typedef void (*hashfree_func)(void* data);
typedef struct hashtbl hashtbl;
struct hashtbl {
unsigned int modulus;
hashitem** items;
hashkey_func hasher;
hashkeycmp_func keycmp;
hashfree_func datafree;
};
hashtbl* hash_create(unsigned int N, hashkey_func hasher, hashkeycmp_func cmp, hashfree_func datafree);
int hash_add(const void* key, void* data, hashtbl* tbl);
void* hash_find(const void* key, hashtbl* tbl);
void hash_remove(const void* key, hashtbl* tbl);
void hash_free(hashtbl* tbl);
void hash_destroy(hashtbl* tbl);
/*
* found in lookup3.c
*/
#include <stddef.h>
#include <stdint.h>
extern uint32_t hashlittle(const void* key, size_t length, uint32_t initval);
extern uint32_t hashbig(const void* key, size_t length, uint32_t initval);
extern uint32_t hashword(const uint32_t* k, size_t length, uint32_t initval);
#endif // __dnscap_hashtbl_h
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