checksum computation for xxh3

reference-implementations/build.sh

@@ -16,6 +16,8 @@ komihash_5_7/komihash_5_7_checksum_config.cpp \
 murmur3_32/murmur3_32_checksum_config.cpp \
 murmur3_128/murmur3_128_checksum_config.cpp \
 murmur3_128/smhasher/src/MurmurHash3.cpp \
+xxh3/xxh3_checksum_config.cpp \
+xxh3/xxHash/xxhash.c \
 farmna.a \
 farmuo.a \
 -O2 -lssl -lcrypto -o calculate_checksums

reference-implementations/calculate_checksums.cpp

@@ -32,6 +32,7 @@
 #include "murmur3_32/murmur3_32_checksum_config.hpp"
 #include "farmhash_na/farmhash_na_checksum_config.hpp"
 #include "farmhash_uo/farmhash_uo_checksum_config.hpp"
+#include "xxh3/xxh3_checksum_config.hpp"
 
 using namespace std;
 
@@ -109,6 +110,7 @@ int main(int argc, char *argv[]) {
 	computeAndPrintChecksum<PolymurHash_2_0_ChecksumConfig>();
 	computeAndPrintChecksum<FarmHashNaChecksumConfig>();
 	computeAndPrintChecksum<FarmHashUoChecksumConfig>();
+	computeAndPrintChecksum<XXH3ChecksumConfig>();
 
 	return 0;
 }

reference-implementations/xxh3/xxh3_checksum_config.cpp

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2022-2023 Dynatrace LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "xxh3_checksum_config.hpp"
+#include "xxhash/xxhash.h"
+#include <cstring>
+
+void XXH3ChecksumConfig::calculateHash(const uint8_t *seedBytes,
+		uint8_t *hashBytes, const uint8_t *dataBytes, uint64_t size) const {
+
+	uint64_t seed;
+	memcpy(&seed, seedBytes, 8);
+
+	uint64_t hash0 = XXH3_64bits((char*) (&dataBytes[0]), size);
+	uint64_t hash1 = XXH3_64bits_withSeed((char*) (&dataBytes[0]), size, seed);
+
+	memcpy(hashBytes, &hash0, 8);
+	memcpy(hashBytes + 8, &hash1, 8);
+}

reference-implementations/xxh3/xxh3_checksum_config.hpp

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2022-2023 Dynatrace LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef XXH3_CHECKSUM_CONFIG_HPP
+#define XXH3_CHECKSUM_CONFIG_HPP
+
+#include <string>
+
+class XXH3ChecksumConfig {
+
+public:
+
+	uint64_t getSeedSize() const {
+		return 8;
+	}
+
+	uint64_t getHashSize() const {
+		return 16;
+	}
+
+	std::string getName() const {
+		return "XXH3";
+	}
+
+	void calculateHash(const uint8_t *seedBytes, uint8_t *hashBytes,
+			const uint8_t *dataBytes, uint64_t size) const;
+
+};
+
+#endif // XXH3_CHECKSUM_CONFIG_HPP