1 #ifndef HEADER_CURL_HASH_H 2 #define HEADER_CURL_HASH_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 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.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 * SPDX-License-Identifier: curl 24 * 25 ***************************************************************************/ 26 27 #include "curl_setup.h" 28 29 #include <stddef.h> 30 31 #include "llist.h" 32 33 /* Hash function prototype */ 34 typedef size_t (*hash_function) (void *key, 35 size_t key_length, 36 size_t slots_num); 37 38 /* 39 Comparator function prototype. Compares two keys. 40 */ 41 typedef size_t (*comp_function) (void *key1, 42 size_t key1_len, 43 void *key2, 44 size_t key2_len); 45 46 typedef void (*Curl_hash_dtor)(void *); 47 48 struct Curl_hash { 49 struct Curl_llist *table; 50 51 /* Hash function to be used for this hash table */ 52 hash_function hash_func; 53 54 /* Comparator function to compare keys */ 55 comp_function comp_func; 56 Curl_hash_dtor dtor; 57 size_t slots; 58 size_t size; 59 }; 60 61 struct Curl_hash_element { 62 struct Curl_llist_element list; 63 void *ptr; 64 size_t key_len; 65 char key[1]; /* allocated memory following the struct */ 66 }; 67 68 struct Curl_hash_iterator { 69 struct Curl_hash *hash; 70 size_t slot_index; 71 struct Curl_llist_element *current_element; 72 }; 73 74 void Curl_hash_init(struct Curl_hash *h, 75 size_t slots, 76 hash_function hfunc, 77 comp_function comparator, 78 Curl_hash_dtor dtor); 79 80 void *Curl_hash_add(struct Curl_hash *h, void *key, size_t key_len, void *p); 81 int Curl_hash_delete(struct Curl_hash *h, void *key, size_t key_len); 82 void *Curl_hash_pick(struct Curl_hash *, void *key, size_t key_len); 83 void Curl_hash_apply(struct Curl_hash *h, void *user, 84 void (*cb)(void *user, void *ptr)); 85 #define Curl_hash_count(h) ((h)->size) 86 void Curl_hash_destroy(struct Curl_hash *h); 87 void Curl_hash_clean(struct Curl_hash *h); 88 void Curl_hash_clean_with_criterium(struct Curl_hash *h, void *user, 89 int (*comp)(void *, void *)); 90 size_t Curl_hash_str(void *key, size_t key_length, size_t slots_num); 91 size_t Curl_str_key_compare(void *k1, size_t key1_len, void *k2, 92 size_t key2_len); 93 void Curl_hash_start_iterate(struct Curl_hash *hash, 94 struct Curl_hash_iterator *iter); 95 struct Curl_hash_element * 96 Curl_hash_next_element(struct Curl_hash_iterator *iter); 97 98 void Curl_hash_print(struct Curl_hash *h, 99 void (*func)(void *)); 100 101 /* Hash for `curl_off_t` as key */ 102 void Curl_hash_offt_init(struct Curl_hash *h, size_t slots, 103 Curl_hash_dtor dtor); 104 105 void *Curl_hash_offt_set(struct Curl_hash *h, curl_off_t id, void *elem); 106 int Curl_hash_offt_remove(struct Curl_hash *h, curl_off_t id); 107 void *Curl_hash_offt_get(struct Curl_hash *h, curl_off_t id); 108 109 110 #endif /* HEADER_CURL_HASH_H */ 111
