1 #ifndef __HASH_H 2 #define __HASH_H 3 /*************************************************************************** 4 * _ _ ____ _ 5 * Project ___| | | | _ \| | 6 * / __| | | | |_) | | 7 * | (__| |_| | _ <| |___ 8 * \___|\___/|_| \_\_____| 9 * 10 * Copyright (C) 1998 - 2007, 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 http://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 * $Id: hash.h,v 1.18 2007-06-26 21:09:28 bagder Exp $ 24 ***************************************************************************/ 25 26 #include "setup.h" 27 28 #include <stddef.h> 29 30 #include "llist.h" 31 32 /* Hash function prototype */ 33 typedef size_t (*hash_function) (void* key, 34 size_t key_length, 35 size_t slots_num); 36 37 /* 38 Comparator function prototype. Compares two keys. 39 */ 40 typedef size_t (*comp_function) (void* key1, 41 size_t key1_len, 42 void*key2, 43 size_t key2_len); 44 45 typedef void (*curl_hash_dtor)(void *); 46 47 struct curl_hash { 48 struct curl_llist **table; 49 50 /* Hash function to be used for this hash table */ 51 hash_function hash_func; 52 53 /* Comparator function to compare keys */ 54 comp_function comp_func; 55 curl_hash_dtor dtor; 56 int slots; 57 size_t size; 58 }; 59 60 struct curl_hash_element { 61 void *ptr; 62 char *key; 63 size_t key_len; 64 }; 65 66 67 int Curl_hash_init(struct curl_hash *h, 68 int slots, 69 hash_function hfunc, 70 comp_function comparator, 71 curl_hash_dtor dtor); 72 73 struct curl_hash *Curl_hash_alloc(int slots, 74 hash_function hfunc, 75 comp_function comparator, 76 curl_hash_dtor dtor); 77 78 void *Curl_hash_add(struct curl_hash *h, void *key, size_t key_len, void *p); 79 int Curl_hash_delete(struct curl_hash *h, void *key, size_t key_len); 80 void *Curl_hash_pick(struct curl_hash *, void * key, size_t key_len); 81 void Curl_hash_apply(struct curl_hash *h, void *user, 82 void (*cb)(void *user, void *ptr)); 83 int Curl_hash_count(struct curl_hash *h); 84 void Curl_hash_clean(struct curl_hash *h); 85 void Curl_hash_clean_with_criterium(struct curl_hash *h, void *user, 86 int (*comp)(void *, void *)); 87 void Curl_hash_destroy(struct curl_hash *h); 88 89 size_t Curl_hash_str(void* key, size_t key_length, size_t slots_num); 90 size_t Curl_str_key_compare(void*k1, size_t key1_len, void*k2, 91 size_t key2_len); 92 93 #endif 94