414 lines
14 KiB
C++
414 lines
14 KiB
C++
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// metrohash128.cpp
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//
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// Copyright 2015-2018 J. Andrew Rogers
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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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#include <string.h>
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#include "platform.h"
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#include "metrohash128.h"
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const char * MetroHash128::test_string = "012345678901234567890123456789012345678901234567890123456789012";
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const uint8_t MetroHash128::test_seed_0[16] = {
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0xC7, 0x7C, 0xE2, 0xBF, 0xA4, 0xED, 0x9F, 0x9B,
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0x05, 0x48, 0xB2, 0xAC, 0x50, 0x74, 0xA2, 0x97
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};
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const uint8_t MetroHash128::test_seed_1[16] = {
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0x45, 0xA3, 0xCD, 0xB8, 0x38, 0x19, 0x9D, 0x7F,
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0xBD, 0xD6, 0x8D, 0x86, 0x7A, 0x14, 0xEC, 0xEF
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};
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MetroHash128::MetroHash128(const uint64_t seed)
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{
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Initialize(seed);
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}
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void MetroHash128::Initialize(const uint64_t seed)
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{
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// initialize internal hash registers
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state.v[0] = (static_cast<uint64_t>(seed) - k0) * k3;
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state.v[1] = (static_cast<uint64_t>(seed) + k1) * k2;
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state.v[2] = (static_cast<uint64_t>(seed) + k0) * k2;
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state.v[3] = (static_cast<uint64_t>(seed) - k1) * k3;
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// initialize total length of input
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bytes = 0;
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}
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void MetroHash128::Update(const uint8_t * const buffer, const uint64_t length)
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{
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const uint8_t * ptr = reinterpret_cast<const uint8_t*>(buffer);
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const uint8_t * const end = ptr + length;
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// input buffer may be partially filled
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if (bytes % 32)
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{
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uint64_t fill = 32 - (bytes % 32);
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if (fill > length)
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fill = length;
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memcpy(input.b + (bytes % 32), ptr, static_cast<size_t>(fill));
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ptr += fill;
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bytes += fill;
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// input buffer is still partially filled
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if ((bytes % 32) != 0) return;
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// process full input buffer
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state.v[0] += read_u64(&input.b[ 0]) * k0; state.v[0] = rotate_right(state.v[0],29) + state.v[2];
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state.v[1] += read_u64(&input.b[ 8]) * k1; state.v[1] = rotate_right(state.v[1],29) + state.v[3];
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state.v[2] += read_u64(&input.b[16]) * k2; state.v[2] = rotate_right(state.v[2],29) + state.v[0];
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state.v[3] += read_u64(&input.b[24]) * k3; state.v[3] = rotate_right(state.v[3],29) + state.v[1];
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}
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// bulk update
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bytes += (end - ptr);
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while (ptr <= (end - 32))
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{
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// process directly from the source, bypassing the input buffer
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state.v[0] += read_u64(ptr) * k0; ptr += 8; state.v[0] = rotate_right(state.v[0],29) + state.v[2];
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state.v[1] += read_u64(ptr) * k1; ptr += 8; state.v[1] = rotate_right(state.v[1],29) + state.v[3];
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state.v[2] += read_u64(ptr) * k2; ptr += 8; state.v[2] = rotate_right(state.v[2],29) + state.v[0];
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state.v[3] += read_u64(ptr) * k3; ptr += 8; state.v[3] = rotate_right(state.v[3],29) + state.v[1];
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}
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// store remaining bytes in input buffer
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if (ptr < end)
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memcpy(input.b, ptr, end - ptr);
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}
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void MetroHash128::Finalize(uint8_t * const hash)
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{
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// finalize bulk loop, if used
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if (bytes >= 32)
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{
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state.v[2] ^= rotate_right(((state.v[0] + state.v[3]) * k0) + state.v[1], 21) * k1;
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state.v[3] ^= rotate_right(((state.v[1] + state.v[2]) * k1) + state.v[0], 21) * k0;
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state.v[0] ^= rotate_right(((state.v[0] + state.v[2]) * k0) + state.v[3], 21) * k1;
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state.v[1] ^= rotate_right(((state.v[1] + state.v[3]) * k1) + state.v[2], 21) * k0;
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}
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// process any bytes remaining in the input buffer
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const uint8_t * ptr = reinterpret_cast<const uint8_t*>(input.b);
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const uint8_t * const end = ptr + (bytes % 32);
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if ((end - ptr) >= 16)
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{
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state.v[0] += read_u64(ptr) * k2; ptr += 8; state.v[0] = rotate_right(state.v[0],33) * k3;
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state.v[1] += read_u64(ptr) * k2; ptr += 8; state.v[1] = rotate_right(state.v[1],33) * k3;
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state.v[0] ^= rotate_right((state.v[0] * k2) + state.v[1], 45) * k1;
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state.v[1] ^= rotate_right((state.v[1] * k3) + state.v[0], 45) * k0;
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}
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if ((end - ptr) >= 8)
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{
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state.v[0] += read_u64(ptr) * k2; ptr += 8; state.v[0] = rotate_right(state.v[0],33) * k3;
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state.v[0] ^= rotate_right((state.v[0] * k2) + state.v[1], 27) * k1;
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}
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if ((end - ptr) >= 4)
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{
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state.v[1] += read_u32(ptr) * k2; ptr += 4; state.v[1] = rotate_right(state.v[1],33) * k3;
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state.v[1] ^= rotate_right((state.v[1] * k3) + state.v[0], 46) * k0;
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}
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if ((end - ptr) >= 2)
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{
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state.v[0] += read_u16(ptr) * k2; ptr += 2; state.v[0] = rotate_right(state.v[0],33) * k3;
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state.v[0] ^= rotate_right((state.v[0] * k2) + state.v[1], 22) * k1;
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}
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if ((end - ptr) >= 1)
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{
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state.v[1] += read_u8 (ptr) * k2; state.v[1] = rotate_right(state.v[1],33) * k3;
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state.v[1] ^= rotate_right((state.v[1] * k3) + state.v[0], 58) * k0;
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}
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state.v[0] += rotate_right((state.v[0] * k0) + state.v[1], 13);
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state.v[1] += rotate_right((state.v[1] * k1) + state.v[0], 37);
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state.v[0] += rotate_right((state.v[0] * k2) + state.v[1], 13);
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state.v[1] += rotate_right((state.v[1] * k3) + state.v[0], 37);
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bytes = 0;
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// do any endian conversion here
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memcpy(hash, state.v, 16);
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}
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void MetroHash128::Hash(const uint8_t * buffer, const uint64_t length, uint8_t * const hash, const uint64_t seed)
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{
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const uint8_t * ptr = reinterpret_cast<const uint8_t*>(buffer);
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const uint8_t * const end = ptr + length;
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uint64_t v[4];
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v[0] = (static_cast<uint64_t>(seed) - k0) * k3;
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v[1] = (static_cast<uint64_t>(seed) + k1) * k2;
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if (length >= 32)
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{
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v[2] = (static_cast<uint64_t>(seed) + k0) * k2;
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v[3] = (static_cast<uint64_t>(seed) - k1) * k3;
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do
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{
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v[0] += read_u64(ptr) * k0; ptr += 8; v[0] = rotate_right(v[0],29) + v[2];
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v[1] += read_u64(ptr) * k1; ptr += 8; v[1] = rotate_right(v[1],29) + v[3];
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v[2] += read_u64(ptr) * k2; ptr += 8; v[2] = rotate_right(v[2],29) + v[0];
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v[3] += read_u64(ptr) * k3; ptr += 8; v[3] = rotate_right(v[3],29) + v[1];
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}
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while (ptr <= (end - 32));
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v[2] ^= rotate_right(((v[0] + v[3]) * k0) + v[1], 21) * k1;
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v[3] ^= rotate_right(((v[1] + v[2]) * k1) + v[0], 21) * k0;
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v[0] ^= rotate_right(((v[0] + v[2]) * k0) + v[3], 21) * k1;
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v[1] ^= rotate_right(((v[1] + v[3]) * k1) + v[2], 21) * k0;
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}
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if ((end - ptr) >= 16)
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{
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v[0] += read_u64(ptr) * k2; ptr += 8; v[0] = rotate_right(v[0],33) * k3;
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v[1] += read_u64(ptr) * k2; ptr += 8; v[1] = rotate_right(v[1],33) * k3;
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v[0] ^= rotate_right((v[0] * k2) + v[1], 45) * k1;
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v[1] ^= rotate_right((v[1] * k3) + v[0], 45) * k0;
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}
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if ((end - ptr) >= 8)
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{
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v[0] += read_u64(ptr) * k2; ptr += 8; v[0] = rotate_right(v[0],33) * k3;
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v[0] ^= rotate_right((v[0] * k2) + v[1], 27) * k1;
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}
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if ((end - ptr) >= 4)
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{
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v[1] += read_u32(ptr) * k2; ptr += 4; v[1] = rotate_right(v[1],33) * k3;
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v[1] ^= rotate_right((v[1] * k3) + v[0], 46) * k0;
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}
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if ((end - ptr) >= 2)
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{
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v[0] += read_u16(ptr) * k2; ptr += 2; v[0] = rotate_right(v[0],33) * k3;
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v[0] ^= rotate_right((v[0] * k2) + v[1], 22) * k1;
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}
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if ((end - ptr) >= 1)
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{
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v[1] += read_u8 (ptr) * k2; v[1] = rotate_right(v[1],33) * k3;
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v[1] ^= rotate_right((v[1] * k3) + v[0], 58) * k0;
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}
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v[0] += rotate_right((v[0] * k0) + v[1], 13);
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v[1] += rotate_right((v[1] * k1) + v[0], 37);
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v[0] += rotate_right((v[0] * k2) + v[1], 13);
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v[1] += rotate_right((v[1] * k3) + v[0], 37);
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// do any endian conversion here
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memcpy(hash, v, 16);
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}
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bool MetroHash128::ImplementationVerified()
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{
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uint8_t hash[16];
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const uint8_t * key = reinterpret_cast<const uint8_t *>(MetroHash128::test_string);
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// verify one-shot implementation
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MetroHash128::Hash(key, strlen(MetroHash128::test_string), hash, 0);
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if (memcmp(hash, MetroHash128::test_seed_0, 16) != 0) return false;
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MetroHash128::Hash(key, strlen(MetroHash128::test_string), hash, 1);
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if (memcmp(hash, MetroHash128::test_seed_1, 16) != 0) return false;
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// verify incremental implementation
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MetroHash128 metro;
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metro.Initialize(0);
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metro.Update(reinterpret_cast<const uint8_t *>(MetroHash128::test_string), strlen(MetroHash128::test_string));
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metro.Finalize(hash);
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if (memcmp(hash, MetroHash128::test_seed_0, 16) != 0) return false;
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metro.Initialize(1);
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metro.Update(reinterpret_cast<const uint8_t *>(MetroHash128::test_string), strlen(MetroHash128::test_string));
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metro.Finalize(hash);
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if (memcmp(hash, MetroHash128::test_seed_1, 16) != 0) return false;
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return true;
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}
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void metrohash128_1(const uint8_t * key, uint64_t len, uint32_t seed, uint8_t * out)
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{
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static const uint64_t k0 = 0xC83A91E1;
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static const uint64_t k1 = 0x8648DBDB;
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static const uint64_t k2 = 0x7BDEC03B;
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static const uint64_t k3 = 0x2F5870A5;
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const uint8_t * ptr = reinterpret_cast<const uint8_t*>(key);
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const uint8_t * const end = ptr + len;
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uint64_t v[4];
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v[0] = ((static_cast<uint64_t>(seed) - k0) * k3) + len;
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v[1] = ((static_cast<uint64_t>(seed) + k1) * k2) + len;
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if (len >= 32)
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{
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v[2] = ((static_cast<uint64_t>(seed) + k0) * k2) + len;
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v[3] = ((static_cast<uint64_t>(seed) - k1) * k3) + len;
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do
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{
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v[0] += read_u64(ptr) * k0; ptr += 8; v[0] = rotate_right(v[0],29) + v[2];
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v[1] += read_u64(ptr) * k1; ptr += 8; v[1] = rotate_right(v[1],29) + v[3];
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v[2] += read_u64(ptr) * k2; ptr += 8; v[2] = rotate_right(v[2],29) + v[0];
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v[3] += read_u64(ptr) * k3; ptr += 8; v[3] = rotate_right(v[3],29) + v[1];
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}
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while (ptr <= (end - 32));
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v[2] ^= rotate_right(((v[0] + v[3]) * k0) + v[1], 26) * k1;
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v[3] ^= rotate_right(((v[1] + v[2]) * k1) + v[0], 26) * k0;
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v[0] ^= rotate_right(((v[0] + v[2]) * k0) + v[3], 26) * k1;
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v[1] ^= rotate_right(((v[1] + v[3]) * k1) + v[2], 30) * k0;
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}
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if ((end - ptr) >= 16)
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{
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v[0] += read_u64(ptr) * k2; ptr += 8; v[0] = rotate_right(v[0],33) * k3;
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v[1] += read_u64(ptr) * k2; ptr += 8; v[1] = rotate_right(v[1],33) * k3;
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v[0] ^= rotate_right((v[0] * k2) + v[1], 17) * k1;
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||
|
|
v[1] ^= rotate_right((v[1] * k3) + v[0], 17) * k0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 8)
|
||
|
|
{
|
||
|
|
v[0] += read_u64(ptr) * k2; ptr += 8; v[0] = rotate_right(v[0],33) * k3;
|
||
|
|
v[0] ^= rotate_right((v[0] * k2) + v[1], 20) * k1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 4)
|
||
|
|
{
|
||
|
|
v[1] += read_u32(ptr) * k2; ptr += 4; v[1] = rotate_right(v[1],33) * k3;
|
||
|
|
v[1] ^= rotate_right((v[1] * k3) + v[0], 18) * k0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 2)
|
||
|
|
{
|
||
|
|
v[0] += read_u16(ptr) * k2; ptr += 2; v[0] = rotate_right(v[0],33) * k3;
|
||
|
|
v[0] ^= rotate_right((v[0] * k2) + v[1], 24) * k1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 1)
|
||
|
|
{
|
||
|
|
v[1] += read_u8 (ptr) * k2; v[1] = rotate_right(v[1],33) * k3;
|
||
|
|
v[1] ^= rotate_right((v[1] * k3) + v[0], 24) * k0;
|
||
|
|
}
|
||
|
|
|
||
|
|
v[0] += rotate_right((v[0] * k0) + v[1], 13);
|
||
|
|
v[1] += rotate_right((v[1] * k1) + v[0], 37);
|
||
|
|
v[0] += rotate_right((v[0] * k2) + v[1], 13);
|
||
|
|
v[1] += rotate_right((v[1] * k3) + v[0], 37);
|
||
|
|
|
||
|
|
// do any endian conversion here
|
||
|
|
|
||
|
|
memcpy(out, v, 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void metrohash128_2(const uint8_t * key, uint64_t len, uint32_t seed, uint8_t * out)
|
||
|
|
{
|
||
|
|
static const uint64_t k0 = 0xD6D018F5;
|
||
|
|
static const uint64_t k1 = 0xA2AA033B;
|
||
|
|
static const uint64_t k2 = 0x62992FC1;
|
||
|
|
static const uint64_t k3 = 0x30BC5B29;
|
||
|
|
|
||
|
|
const uint8_t * ptr = reinterpret_cast<const uint8_t*>(key);
|
||
|
|
const uint8_t * const end = ptr + len;
|
||
|
|
|
||
|
|
uint64_t v[4];
|
||
|
|
|
||
|
|
v[0] = ((static_cast<uint64_t>(seed) - k0) * k3) + len;
|
||
|
|
v[1] = ((static_cast<uint64_t>(seed) + k1) * k2) + len;
|
||
|
|
|
||
|
|
if (len >= 32)
|
||
|
|
{
|
||
|
|
v[2] = ((static_cast<uint64_t>(seed) + k0) * k2) + len;
|
||
|
|
v[3] = ((static_cast<uint64_t>(seed) - k1) * k3) + len;
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
v[0] += read_u64(ptr) * k0; ptr += 8; v[0] = rotate_right(v[0],29) + v[2];
|
||
|
|
v[1] += read_u64(ptr) * k1; ptr += 8; v[1] = rotate_right(v[1],29) + v[3];
|
||
|
|
v[2] += read_u64(ptr) * k2; ptr += 8; v[2] = rotate_right(v[2],29) + v[0];
|
||
|
|
v[3] += read_u64(ptr) * k3; ptr += 8; v[3] = rotate_right(v[3],29) + v[1];
|
||
|
|
}
|
||
|
|
while (ptr <= (end - 32));
|
||
|
|
|
||
|
|
v[2] ^= rotate_right(((v[0] + v[3]) * k0) + v[1], 33) * k1;
|
||
|
|
v[3] ^= rotate_right(((v[1] + v[2]) * k1) + v[0], 33) * k0;
|
||
|
|
v[0] ^= rotate_right(((v[0] + v[2]) * k0) + v[3], 33) * k1;
|
||
|
|
v[1] ^= rotate_right(((v[1] + v[3]) * k1) + v[2], 33) * k0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 16)
|
||
|
|
{
|
||
|
|
v[0] += read_u64(ptr) * k2; ptr += 8; v[0] = rotate_right(v[0],29) * k3;
|
||
|
|
v[1] += read_u64(ptr) * k2; ptr += 8; v[1] = rotate_right(v[1],29) * k3;
|
||
|
|
v[0] ^= rotate_right((v[0] * k2) + v[1], 29) * k1;
|
||
|
|
v[1] ^= rotate_right((v[1] * k3) + v[0], 29) * k0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 8)
|
||
|
|
{
|
||
|
|
v[0] += read_u64(ptr) * k2; ptr += 8; v[0] = rotate_right(v[0],29) * k3;
|
||
|
|
v[0] ^= rotate_right((v[0] * k2) + v[1], 29) * k1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 4)
|
||
|
|
{
|
||
|
|
v[1] += read_u32(ptr) * k2; ptr += 4; v[1] = rotate_right(v[1],29) * k3;
|
||
|
|
v[1] ^= rotate_right((v[1] * k3) + v[0], 25) * k0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 2)
|
||
|
|
{
|
||
|
|
v[0] += read_u16(ptr) * k2; ptr += 2; v[0] = rotate_right(v[0],29) * k3;
|
||
|
|
v[0] ^= rotate_right((v[0] * k2) + v[1], 30) * k1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((end - ptr) >= 1)
|
||
|
|
{
|
||
|
|
v[1] += read_u8 (ptr) * k2; v[1] = rotate_right(v[1],29) * k3;
|
||
|
|
v[1] ^= rotate_right((v[1] * k3) + v[0], 18) * k0;
|
||
|
|
}
|
||
|
|
|
||
|
|
v[0] += rotate_right((v[0] * k0) + v[1], 33);
|
||
|
|
v[1] += rotate_right((v[1] * k1) + v[0], 33);
|
||
|
|
v[0] += rotate_right((v[0] * k2) + v[1], 33);
|
||
|
|
v[1] += rotate_right((v[1] * k3) + v[0], 33);
|
||
|
|
|
||
|
|
// do any endian conversion here
|
||
|
|
|
||
|
|
memcpy(out, v, 16);
|
||
|
|
}
|
||
|
|
|