diff options
Diffstat (limited to 'src/glsl/hash_table.c')
-rw-r--r-- | src/glsl/hash_table.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/src/glsl/hash_table.c b/src/glsl/hash_table.c deleted file mode 100644 index e89a2564d7..0000000000 --- a/src/glsl/hash_table.c +++ /dev/null @@ -1,159 +0,0 @@ -/* - * Copyright © 2008 Intel Corporation - * - * 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 (including the next - * paragraph) 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. - */ - -/** - * \file hash_table.c - * \brief Implementation of a generic, opaque hash table data type. - * - * \author Ian Romanick <ian.d.romanick@intel.com> - */ - -#include "main/imports.h" -#include "main/simple_list.h" -#include "hash_table.h" - -struct node { - struct node *next; - struct node *prev; -}; - -struct hash_table { - hash_func_t hash; - hash_compare_func_t compare; - - unsigned num_buckets; - struct node buckets[1]; -}; - - -struct hash_node { - struct node link; - const void *key; - void *data; -}; - - -struct hash_table * -hash_table_ctor(unsigned num_buckets, hash_func_t hash, - hash_compare_func_t compare) -{ - struct hash_table *ht; - unsigned i; - - - if (num_buckets < 16) { - num_buckets = 16; - } - - ht = _mesa_malloc(sizeof(*ht) + ((num_buckets - 1) - * sizeof(ht->buckets[0]))); - if (ht != NULL) { - ht->hash = hash; - ht->compare = compare; - ht->num_buckets = num_buckets; - - for (i = 0; i < num_buckets; i++) { - make_empty_list(& ht->buckets[i]); - } - } - - return ht; -} - - -void -hash_table_dtor(struct hash_table *ht) -{ - hash_table_clear(ht); - _mesa_free(ht); -} - - -void -hash_table_clear(struct hash_table *ht) -{ - struct node *node; - struct node *temp; - unsigned i; - - - for (i = 0; i < ht->num_buckets; i++) { - foreach_s(node, temp, & ht->buckets[i]) { - remove_from_list(node); - _mesa_free(node); - } - - assert(is_empty_list(& ht->buckets[i])); - } -} - - -void * -hash_table_find(struct hash_table *ht, const void *key) -{ - const unsigned hash_value = (*ht->hash)(key); - const unsigned bucket = hash_value % ht->num_buckets; - struct node *node; - - foreach(node, & ht->buckets[bucket]) { - struct hash_node *hn = (struct hash_node *) node; - - if ((*ht->compare)(hn->key, key) == 0) { - return hn->data; - } - } - - return NULL; -} - - -void -hash_table_insert(struct hash_table *ht, void *data, const void *key) -{ - const unsigned hash_value = (*ht->hash)(key); - const unsigned bucket = hash_value % ht->num_buckets; - struct hash_node *node; - - node = _mesa_calloc(sizeof(*node)); - - node->data = data; - node->key = key; - - insert_at_head(& ht->buckets[bucket], & node->link); -} - - -unsigned -hash_table_string_hash(const void *key) -{ - const char *str = (const char *) key; - unsigned hash = 5381; - - - while (*str != '\0') { - hash = (hash * 33) + *str; - str++; - } - - return hash; -} |