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#ifndef HEADER_CURL_HASH_H
#define HEADER_CURL_HASH_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#include <stddef.h>
#include "llist.h"
/* Hash function prototype */
typedef size_t (*hash_function) (void *key,
size_t key_length,
size_t slots_num);
/*
Comparator function prototype. Compares two keys.
*/
typedef size_t (*comp_function) (void *key1,
size_t key1_len,
void *key2,
size_t key2_len);
typedef void (*Curl_hash_dtor)(void *);
struct Curl_hash {
struct Curl_llist *table;
/* Hash function to be used for this hash table */
hash_function hash_func;
/* Comparator function to compare keys */
comp_function comp_func;
Curl_hash_dtor dtor;
size_t slots;
size_t size;
};
typedef void (*Curl_hash_elem_dtor)(void *key, size_t key_len, void *p);
struct Curl_hash_element {
struct Curl_llist_element list;
void *ptr;
Curl_hash_elem_dtor dtor;
size_t key_len;
char key[1]; /* allocated memory following the struct */
};
struct Curl_hash_iterator {
struct Curl_hash *hash;
size_t slot_index;
struct Curl_llist_element *current_element;
};
void Curl_hash_init(struct Curl_hash *h,
size_t slots,
hash_function hfunc,
comp_function comparator,
Curl_hash_dtor dtor);
void *Curl_hash_add(struct Curl_hash *h, void *key, size_t key_len, void *p);
void *Curl_hash_add2(struct Curl_hash *h, void *key, size_t key_len, void *p,
Curl_hash_elem_dtor dtor);
int Curl_hash_delete(struct Curl_hash *h, void *key, size_t key_len);
void *Curl_hash_pick(struct Curl_hash *, void *key, size_t key_len);
#define Curl_hash_count(h) ((h)->size)
void Curl_hash_destroy(struct Curl_hash *h);
void Curl_hash_clean(struct Curl_hash *h);
void Curl_hash_clean_with_criterium(struct Curl_hash *h, void *user,
int (*comp)(void *, void *));
size_t Curl_hash_str(void *key, size_t key_length, size_t slots_num);
size_t Curl_str_key_compare(void *k1, size_t key1_len, void *k2,
size_t key2_len);
void Curl_hash_start_iterate(struct Curl_hash *hash,
struct Curl_hash_iterator *iter);
struct Curl_hash_element *
Curl_hash_next_element(struct Curl_hash_iterator *iter);
void Curl_hash_print(struct Curl_hash *h,
void (*func)(void *));
/* Hash for `curl_off_t` as key */
void Curl_hash_offt_init(struct Curl_hash *h, size_t slots,
Curl_hash_dtor dtor);
void *Curl_hash_offt_set(struct Curl_hash *h, curl_off_t id, void *elem);
int Curl_hash_offt_remove(struct Curl_hash *h, curl_off_t id);
void *Curl_hash_offt_get(struct Curl_hash *h, curl_off_t id);
#endif /* HEADER_CURL_HASH_H */
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