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37 lines
967 B
C
37 lines
967 B
C
/*
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* Copyright 2024 Google LLC
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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 "util/hash.h"
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#include <stdint.h>
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// Based on DJB2 Hash
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uint32_t hash(const uint8_t *bytes, const uint32_t length) {
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uint32_t hash = 5381;
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if (length == 0) {
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return hash;
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}
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uint8_t c;
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const uint8_t *last_byte = bytes + length;
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while (bytes != last_byte) {
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c = *bytes;
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hash = ((hash << 5) + hash) + c;
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bytes++;
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}
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return hash;
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}
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