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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab ft=cpp
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2023 Red Hat, Inc
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#pragma once
#include <stdint.h>
#include <stdio.h>
#include "rgw_crc_digest.h"
#define XXH_INLINE_ALL 1 /* required for streaming variants */
#include "xxhash.h"
namespace rgw { namespace digest {
class XXH3 {
private:
XXH3_state_t s;
public:
static constexpr uint16_t digest_size = 8;
XXH3() {
XXH3_INITSTATE(&s);
Restart();
}
void Restart() { XXH3_64bits_reset(&s); }
void Update(const unsigned char *data, uint64_t len) {
XXH3_64bits_update(&s, data, len);
}
void Final(unsigned char* digest) {
XXH64_hash_t final = XXH3_64bits_digest(&s);
if constexpr (std::endian::native != std::endian::big) {
final = rgw::digest::byteswap(final);
}
memcpy((char*) digest, &final, sizeof(final));
}
}; /* XXH3 */
}} /* namespace */
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