Function deterministicHash

src/backend/common/deterministicHash.cpp:20–27

using std::string;

size_t deterministicHash(const void* data, size_t byteSize, size_t prevHash) {
    // Fowler-Noll-Vo "1a" 32 bit hash
    // https://en.wikipedia.org/wiki/Fowler-Noll-Vo_hash_function
    const auto* byteData = static_cast<const uint8_t*>(data);
    return accumulate(
        byteData, byteData + byteSize, prevHash,
        [&](size_t hash, uint8_t data) { return (hash ^ data) * FNV1A_PRIME; });
}

size_t deterministicHash(const string& data, const size_t prevHash) {
    return deterministicHash(data.data(), data.size(), prevHash);