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