2015-02-28 19:58:37 +00:00
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/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file fnv.h
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* @author Matthew Wampler-Doty <negacthulhu@gmail.com>
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* @date 2015
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*/
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#pragma once
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#include <stdint.h>
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#include "compiler.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define FNV_PRIME 0x01000193
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2015-07-29 22:45:27 +00:00
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/* The FNV-1 spec multiplies the prime with the input one byte (octet) in turn.
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We instead multiply it with the full 32-bit input.
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This gives a different result compared to a canonical FNV-1 implementation.
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*/
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2015-05-05 05:50:04 +00:00
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static inline uint32_t fnv_hash(uint32_t const x, uint32_t const y)
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{
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return x * FNV_PRIME ^ y;
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2015-02-28 19:58:37 +00:00
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}
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#ifdef __cplusplus
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}
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2015-05-05 05:50:04 +00:00
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#endif
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