Rev 792 | Rev 1702 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
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| 790 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __HASH_TABLE_H__ |
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| 30 | #define __HASH_TABLE_H__ |
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| 31 | |||
| 792 | jermar | 32 | #include <adt/list.h> |
| 790 | jermar | 33 | #include <arch/types.h> |
| 34 | #include <typedefs.h> |
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| 35 | |||
| 36 | /** Hash table structure. */ |
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| 37 | struct hash_table { |
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| 38 | link_t *entry; |
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| 39 | count_t entries; |
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| 40 | count_t max_keys; |
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| 41 | hash_table_operations_t *op; |
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| 42 | }; |
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| 43 | |||
| 44 | /** Set of operations for hash table. */ |
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| 45 | struct hash_table_operations { |
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| 46 | /** Hash function. |
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| 47 | * |
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| 48 | * @param key Array of keys needed to compute hash index. All keys must be passed. |
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| 49 | * |
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| 50 | * @return Index into hash table. |
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| 51 | */ |
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| 52 | index_t (* hash)(__native key[]); |
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| 53 | |||
| 54 | /** Hash table item comparison function. |
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| 55 | * |
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| 792 | jermar | 56 | * @param key Array of keys that will be compared with item. It is not necessary to pass all keys. |
| 790 | jermar | 57 | * |
| 58 | * @return true if the keys match, false otherwise. |
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| 59 | */ |
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| 60 | bool (*compare)(__native key[], count_t keys, link_t *item); |
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| 61 | |||
| 62 | /** Hash table item removal callback. |
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| 63 | * |
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| 64 | * @param item Item that was removed from the hash table. |
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| 65 | */ |
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| 66 | void (*remove_callback)(link_t *item); |
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| 67 | }; |
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| 68 | |||
| 793 | jermar | 69 | #define hash_table_get_instance(item, type, member) list_get_instance((item), type, member) |
| 790 | jermar | 70 | |
| 71 | extern void hash_table_create(hash_table_t *h, count_t m, count_t max_keys, hash_table_operations_t *op); |
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| 792 | jermar | 72 | extern void hash_table_insert(hash_table_t *h, __native key[], link_t *item); |
| 790 | jermar | 73 | extern link_t *hash_table_find(hash_table_t *h, __native key[]); |
| 74 | extern void hash_table_remove(hash_table_t *h, __native key[], count_t keys); |
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| 75 | |||
| 76 | #endif |