52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
#ifndef MATADOR_UUID_HPP
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#define MATADOR_UUID_HPP
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#include <array>
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#include <string>
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#include <cstdint>
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namespace matador::utils {
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class uuid {
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public:
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using uuid_array = std::array<uint32_t, 4>;
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// Default constructor initializes to zero
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uuid() = default;
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// Static UUID v4 generator
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static uuid generate();
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// Returns UUID as a string
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[[nodiscard]] std::string str() const;
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// Access to internal data
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[[nodiscard]] const uuid_array& data() const;
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// Reset UUID to zero
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void clear() { _data.fill(0); }
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// Comparisons
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friend bool operator==(const uuid& lhs, const uuid& rhs);
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friend bool operator!=(const uuid& lhs, const uuid& rhs);
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friend bool operator<(const uuid& lhs, const uuid& rhs);
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private:
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uuid_array _data{0, 0, 0, 0};
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};
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}
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// Hash specialization to allow use in unordered containers
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template <>
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struct std::hash<matador::utils::uuid> {
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std::size_t operator()(const matador::utils::uuid& u) const noexcept {
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std::size_t h = 0;
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for (uint32_t val : u.data()) {
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h ^= std::hash<uint32_t>{}(val) + 0x9e3779b9 + (h << 6) + (h >> 2);
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}
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return h;
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}
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};
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#endif //MATADOR_UUID_HPP
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