move sunshine to src
- this will allow for common cpp workflow files within org
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79
src/uuid.h
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79
src/uuid.h
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@@ -0,0 +1,79 @@
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//
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// Created by loki on 8-2-19.
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//
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#ifndef T_MAN_UUID_H
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#define T_MAN_UUID_H
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#include <random>
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namespace util {
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union uuid_t {
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std::uint8_t b8[16];
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std::uint16_t b16[8];
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std::uint32_t b32[4];
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std::uint64_t b64[2];
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static uuid_t generate(std::default_random_engine &engine) {
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std::uniform_int_distribution<std::uint8_t> dist(0, std::numeric_limits<std::uint8_t>::max());
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uuid_t buf;
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for(auto &el : buf.b8) {
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el = dist(engine);
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}
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buf.b8[7] &= (std::uint8_t)0b00101111;
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buf.b8[9] &= (std::uint8_t)0b10011111;
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return buf;
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}
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static uuid_t generate() {
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std::random_device r;
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std::default_random_engine engine { r() };
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return generate(engine);
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}
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[[nodiscard]] std::string string() const {
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std::string result;
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result.reserve(sizeof(uuid_t) * 2 + 4);
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auto hex = util::hex(*this, true);
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auto hex_view = hex.to_string_view();
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std::string_view slices[] = {
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hex_view.substr(0, 8),
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hex_view.substr(8, 4),
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hex_view.substr(12, 4),
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hex_view.substr(16, 4)
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};
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auto last_slice = hex_view.substr(20, 12);
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for(auto &slice : slices) {
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std::copy(std::begin(slice), std::end(slice), std::back_inserter(result));
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result.push_back('-');
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}
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std::copy(std::begin(last_slice), std::end(last_slice), std::back_inserter(result));
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return result;
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}
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constexpr bool operator==(const uuid_t &other) const {
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return b64[0] == other.b64[0] && b64[1] == other.b64[1];
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}
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constexpr bool operator<(const uuid_t &other) const {
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return (b64[0] < other.b64[0] || (b64[0] == other.b64[0] && b64[1] < other.b64[1]));
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}
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constexpr bool operator>(const uuid_t &other) const {
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return (b64[0] > other.b64[0] || (b64[0] == other.b64[0] && b64[1] > other.b64[1]));
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}
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};
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} // namespace util
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#endif //T_MAN_UUID_H
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