[388] | 1 | #ifndef HEADER_CURL_HASH_H
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| 2 | #define HEADER_CURL_HASH_H
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| 3 | /***************************************************************************
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| 4 | * _ _ ____ _
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| 5 | * Project ___| | | | _ \| |
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| 6 | * / __| | | | |_) | |
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| 7 | * | (__| |_| | _ <| |___
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| 8 | * \___|\___/|_| \_\_____|
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| 9 | *
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| 10 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 11 | *
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| 12 | * This software is licensed as described in the file COPYING, which
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| 13 | * you should have received as part of this distribution. The terms
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| 14 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 15 | *
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| 16 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 17 | * copies of the Software, and permit persons to whom the Software is
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| 18 | * furnished to do so, under the terms of the COPYING file.
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| 19 | *
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| 20 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 21 | * KIND, either express or implied.
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| 22 | *
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| 23 | ***************************************************************************/
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| 24 |
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| 25 | #include "curl_setup.h"
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| 26 |
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| 27 | #include <stddef.h>
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| 28 |
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| 29 | #include "llist.h"
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| 30 |
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| 31 | /* Hash function prototype */
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| 32 | typedef size_t (*hash_function) (void *key,
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| 33 | size_t key_length,
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| 34 | size_t slots_num);
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| 35 |
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| 36 | /*
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| 37 | Comparator function prototype. Compares two keys.
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| 38 | */
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| 39 | typedef size_t (*comp_function) (void *key1,
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| 40 | size_t key1_len,
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| 41 | void *key2,
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| 42 | size_t key2_len);
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| 43 |
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| 44 | typedef void (*curl_hash_dtor)(void *);
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| 45 |
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| 46 | struct curl_hash {
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| 47 | struct curl_llist *table;
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| 48 |
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| 49 | /* Hash function to be used for this hash table */
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| 50 | hash_function hash_func;
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| 51 |
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| 52 | /* Comparator function to compare keys */
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| 53 | comp_function comp_func;
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| 54 | curl_hash_dtor dtor;
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| 55 | int slots;
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| 56 | size_t size;
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| 57 | };
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| 58 |
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| 59 | struct curl_hash_element {
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| 60 | struct curl_llist_element list;
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| 61 | void *ptr;
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| 62 | size_t key_len;
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| 63 | char key[1]; /* allocated memory following the struct */
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| 64 | };
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| 65 |
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| 66 | struct curl_hash_iterator {
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| 67 | struct curl_hash *hash;
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| 68 | int slot_index;
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| 69 | struct curl_llist_element *current_element;
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| 70 | };
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| 71 |
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| 72 | int Curl_hash_init(struct curl_hash *h,
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| 73 | int slots,
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| 74 | hash_function hfunc,
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| 75 | comp_function comparator,
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| 76 | curl_hash_dtor dtor);
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| 77 |
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| 78 | void *Curl_hash_add(struct curl_hash *h, void *key, size_t key_len, void *p);
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| 79 | int Curl_hash_delete(struct curl_hash *h, void *key, size_t key_len);
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| 80 | void *Curl_hash_pick(struct curl_hash *, void *key, size_t key_len);
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| 81 | void Curl_hash_apply(struct curl_hash *h, void *user,
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| 82 | void (*cb)(void *user, void *ptr));
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| 83 | int Curl_hash_count(struct curl_hash *h);
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| 84 | void Curl_hash_destroy(struct curl_hash *h);
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| 85 | void Curl_hash_clean(struct curl_hash *h);
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| 86 | void Curl_hash_clean_with_criterium(struct curl_hash *h, void *user,
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| 87 | int (*comp)(void *, void *));
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| 88 | size_t Curl_hash_str(void *key, size_t key_length, size_t slots_num);
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| 89 | size_t Curl_str_key_compare(void *k1, size_t key1_len, void *k2,
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| 90 | size_t key2_len);
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| 91 | void Curl_hash_start_iterate(struct curl_hash *hash,
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| 92 | struct curl_hash_iterator *iter);
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| 93 | struct curl_hash_element *
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| 94 | Curl_hash_next_element(struct curl_hash_iterator *iter);
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| 95 |
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| 96 | void Curl_hash_print(struct curl_hash *h,
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| 97 | void (*func)(void *));
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| 98 |
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| 99 |
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| 100 | #endif /* HEADER_CURL_HASH_H */
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