Return to hash.h CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / lib

Annotation of embedaddon/curl/lib/hash.h, revision 1.1.1.1

1.1       misho       1: #ifndef HEADER_CURL_HASH_H
                      2: #define HEADER_CURL_HASH_H
                      3: /***************************************************************************
                      4:  *                                  _   _ ____  _
                      5:  *  Project                     ___| | | |  _ \| |
                      6:  *                             / __| | | | |_) | |
                      7:  *                            | (__| |_| |  _ <| |___
                      8:  *                             \___|\___/|_| \_\_____|
                      9:  *
                     10:  * Copyright (C) 1998 - 2019, 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 */
                     32: typedef 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: */
                     39: typedef size_t (*comp_function) (void *key1,
                     40:                                  size_t key1_len,
                     41:                                  void *key2,
                     42:                                  size_t key2_len);
                     43: 
                     44: typedef void (*curl_hash_dtor)(void *);
                     45: 
                     46: struct 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: 
                     59: struct curl_hash_element {
                     60:   struct curl_llist_element list;
                     61:   void   *ptr;
                     62:   size_t key_len;
                     63:   char   key[1]; /* allocated memory following the struct */
                     64: };
                     65: 
                     66: struct curl_hash_iterator {
                     67:   struct curl_hash *hash;
                     68:   int slot_index;
                     69:   struct curl_llist_element *current_element;
                     70: };
                     71: 
                     72: int Curl_hash_init(struct curl_hash *h,
                     73:                    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: #define Curl_hash_count(h) ((h)->size)
                     84: void Curl_hash_destroy(struct curl_hash *h);
                     85: void Curl_hash_clean(struct curl_hash *h);
                     86: void Curl_hash_clean_with_criterium(struct curl_hash *h, void *user,
                     87:                                     int (*comp)(void *, void *));
                     88: size_t Curl_hash_str(void *key, size_t key_length, size_t slots_num);
                     89: size_t Curl_str_key_compare(void *k1, size_t key1_len, void *k2,
                     90:                             size_t key2_len);
                     91: void Curl_hash_start_iterate(struct curl_hash *hash,
                     92:                              struct curl_hash_iterator *iter);
                     93: struct curl_hash_element *
                     94: Curl_hash_next_element(struct curl_hash_iterator *iter);
                     95: 
                     96: void Curl_hash_print(struct curl_hash *h,
                     97:                      void (*func)(void *));
                     98: 
                     99: 
                    100: #endif /* HEADER_CURL_HASH_H */