source: UsbWattMeter/trunk/curl-7.47.1/lib/hash.h@ 167

Last change on this file since 167 was 167, checked in by coas-nagasima, 6 years ago

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1#ifndef HEADER_CURL_HASH_H
2#define HEADER_CURL_HASH_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
11 *
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at https://curl.haxx.se/docs/copyright.html.
15 *
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 ***************************************************************************/
24
25#include "curl_setup.h"
26
27#include <stddef.h>
28
29#include "llist.h"
30
31/* Hash function prototype */
32typedef size_t (*hash_function) (void* key,
33 size_t key_length,
34 size_t slots_num);
35
36/*
37 Comparator function prototype. Compares two keys.
38*/
39typedef size_t (*comp_function) (void* key1,
40 size_t key1_len,
41 void*key2,
42 size_t key2_len);
43
44typedef void (*curl_hash_dtor)(void *);
45
46struct curl_hash {
47 struct curl_llist **table;
48
49 /* Hash function to be used for this hash table */
50 hash_function hash_func;
51
52 /* Comparator function to compare keys */
53 comp_function comp_func;
54 curl_hash_dtor dtor;
55 int slots;
56 size_t size;
57};
58
59struct curl_hash_element {
60 void *ptr;
61 char *key;
62 size_t key_len;
63};
64
65struct curl_hash_iterator {
66 struct curl_hash *hash;
67 int slot_index;
68 struct curl_llist_element *current_element;
69};
70
71int Curl_hash_init(struct curl_hash *h,
72 int slots,
73 hash_function hfunc,
74 comp_function comparator,
75 curl_hash_dtor dtor);
76
77void *Curl_hash_add(struct curl_hash *h, void *key, size_t key_len, void *p);
78int Curl_hash_delete(struct curl_hash *h, void *key, size_t key_len);
79void *Curl_hash_pick(struct curl_hash *, void * key, size_t key_len);
80void Curl_hash_apply(struct curl_hash *h, void *user,
81 void (*cb)(void *user, void *ptr));
82int Curl_hash_count(struct curl_hash *h);
83void Curl_hash_destroy(struct curl_hash *h);
84void Curl_hash_clean(struct curl_hash *h);
85void Curl_hash_clean_with_criterium(struct curl_hash *h, void *user,
86 int (*comp)(void *, void *));
87size_t Curl_hash_str(void* key, size_t key_length, size_t slots_num);
88size_t Curl_str_key_compare(void*k1, size_t key1_len, void*k2,
89 size_t key2_len);
90
91void Curl_hash_start_iterate(struct curl_hash *hash,
92 struct curl_hash_iterator *iter);
93struct curl_hash_element *
94Curl_hash_next_element(struct curl_hash_iterator *iter);
95
96void Curl_hash_print(struct curl_hash *h,
97 void (*func)(void *));
98
99
100#endif /* HEADER_CURL_HASH_H */
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