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33 lines
735 B
C++
33 lines
735 B
C++
/*
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* Copyright (C) 2023-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.1
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*/
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#pragma once
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Warray-bounds"
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#include <xxhash.h>
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#pragma GCC diagnostic pop
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#include "utils/hashing.hh"
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template<typename H>
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concept SimpleHasher = HasherReturning<H, size_t>;
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struct simple_xx_hasher : public hasher {
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XXH64_state_t _state;
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simple_xx_hasher(uint64_t seed = 0) noexcept {
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XXH64_reset(&_state, seed);
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}
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void update(const char* ptr, size_t length) noexcept override {
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XXH64_update(&_state, ptr, length);
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}
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size_t finalize() {
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return static_cast<size_t>(XXH64_digest(&_state));
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}
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};
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