1 /****************************************************************************** 2 * 3 * Copyright (C) 2014 Google, Inc. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #include <string.h> 20 21 #include "osi/include/hash_functions.h" 22 23 hash_index_t hash_function_naive(const void *key) { 24 return (hash_index_t)key; 25 } 26 27 hash_index_t hash_function_integer(const void *key) { 28 return ((hash_index_t)key) * 2654435761; 29 } 30 31 hash_index_t hash_function_pointer(const void *key) { 32 return ((hash_index_t)key) * 2654435761; 33 } 34 35 hash_index_t hash_function_string(const void *key) { 36 hash_index_t hash = 5381; 37 const char *name = (const char *)key; 38 size_t string_len = strlen(name); 39 for (size_t i = 0; i < string_len; ++i) 40 hash = ((hash << 5) + hash ) + name[i]; 41 return hash; 42 } 43
