mirror of https://github.com/ARMmbed/mbed-os.git
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
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* Copyright (c) 2016-2017, Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "nsconfig.h"
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#include "fnv_hash.h"
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#if 0
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uint32_t fnv_hash_1a_32_block(const uint8_t *data, uint16_t len)
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{
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return fnv_hash_1a_32_block_update(UINT32_C(0x811c9dc5), data, len);
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}
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uint32_t fnv_hash_1a_32_block_update(uint32_t hash, const uint8_t *data, uint16_t len)
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{
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for (; len; --len) {
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hash ^= *data++;
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hash *= UINT32_C(0x01000193);
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}
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return hash;
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}
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#endif
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uint32_t fnv_hash_1a_32_reverse_block(const uint8_t *data, uint16_t len)
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{
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return fnv_hash_1a_32_reverse_block_update(UINT32_C(0x811c9dc5), data, len);
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}
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uint32_t fnv_hash_1a_32_reverse_block_update(uint32_t hash, const uint8_t *data, uint16_t len)
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{
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for (data += len; len; --len) {
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hash ^= *--data;
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hash *= UINT32_C(0x01000193);
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}
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return hash;
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}
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