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- /*
- * Copyright [2021] JD.com, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #include "da_hashkit.h"
- static uint64_t FNV_64_INIT = UINT64_C(0xcbf29ce484222325);
- static uint64_t FNV_64_PRIME = UINT64_C(0x100000001b3);
- static uint32_t FNV_32_INIT = 2166136261UL;
- static uint32_t FNV_32_PRIME = 16777619;
- uint32_t
- hash_fnv1_64(const char *key, size_t key_length)
- {
- uint64_t hash = FNV_64_INIT;
- size_t x;
- for (x = 0; x < key_length; x++) {
- hash *= FNV_64_PRIME;
- hash ^= (uint64_t)key[x];
- }
- return (uint32_t)hash;
- }
- uint32_t
- hash_fnv1a_64(const char *key, size_t key_length)
- {
- uint32_t hash = (uint32_t) FNV_64_INIT;
- size_t x;
- for (x = 0; x < key_length; x++) {
- uint32_t val = (uint32_t)key[x];
- hash ^= val;
- hash *= (uint32_t) FNV_64_PRIME;
- }
- return hash;
- }
- uint32_t
- hash_fnv1_32(const char *key, size_t key_length)
- {
- uint32_t hash = FNV_32_INIT;
- size_t x;
- for (x = 0; x < key_length; x++) {
- uint32_t val = (uint32_t)key[x];
- hash *= FNV_32_PRIME;
- hash ^= val;
- }
- return hash;
- }
- uint32_t
- hash_fnv1a_32(const char *key, size_t key_length)
- {
- uint32_t hash = FNV_32_INIT;
- size_t x;
- for (x= 0; x < key_length; x++) {
- uint32_t val = (uint32_t)key[x];
- hash ^= val;
- hash *= FNV_32_PRIME;
- }
- return hash;
- }
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