| /* |
| Copyright (c) 2012-2013 Martin Sustrik All rights reserved. |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), |
| to deal in the Software without restriction, including without limitation |
| the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| and/or sell copies of the Software, and to permit persons to whom |
| the Software is furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included |
| in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| IN THE SOFTWARE. |
| */ |
| |
| #ifndef NN_HASH_INCLUDED |
| #define NN_HASH_INCLUDED |
| |
| #include "list.h" |
| #include "int.h" |
| |
| #include <stddef.h> |
| |
| /* Use for initialising a hash item statically. */ |
| #define NN_HASH_ITEM_INITIALIZER {0xffff, NN_LIST_ITEM_INITILIZER} |
| |
| struct nn_hash_item { |
| uint32_t key; |
| struct nn_list_item list; |
| }; |
| |
| struct nn_hash { |
| uint32_t slots; |
| uint32_t items; |
| struct nn_list *array; |
| }; |
| |
| /* Initialise the hash table. */ |
| void nn_hash_init (struct nn_hash *self); |
| |
| /* Terminate the hash. Note that hash must be manually emptied before the |
| termination. */ |
| void nn_hash_term (struct nn_hash *self); |
| |
| /* Adds an item to the hash. */ |
| void nn_hash_insert (struct nn_hash *self, uint32_t key, |
| struct nn_hash_item *item); |
| |
| /* Removes the element from the hash it is in at the moment. */ |
| void nn_hash_erase (struct nn_hash *self, struct nn_hash_item *item); |
| |
| /* Gets an item in the hash based on the key. Returns NULL if there's no |
| corresponing item in the hash table. */ |
| struct nn_hash_item *nn_hash_get (struct nn_hash *self, uint32_t key); |
| |
| /* Initialise a hash item. At this point it is not a part of any hash table. */ |
| void nn_hash_item_init (struct nn_hash_item *self); |
| |
| /* Terminate a hash item. The item must not be in a hash table prior to |
| this call. */ |
| void nn_hash_item_term (struct nn_hash_item *self); |
| |
| #endif |