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[ox/std] Add hash function for UUID

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This commit is contained in:
Gary Talent 2024-05-10 23:55:41 -05:00
parent b089bf460b
commit b66f61c217
1 changed files with 23 additions and 3 deletions
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26
deps/ox/src/ox/std/uuid.hpp vendored
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@ -8,9 +8,11 @@
#pragma once #pragma once
#include "bit.hpp"
#include "ignore.hpp" #include "ignore.hpp"
#include "istring.hpp" #include "istring.hpp"
#include "buffer.hpp" #include "buffer.hpp"
#include "hash.hpp"
#include "random.hpp" #include "random.hpp"
#include "ranges.hpp" #include "ranges.hpp"
#include "stringview.hpp" #include "stringview.hpp"
@ -105,7 +107,7 @@ class UUID {
static ox::Result<UUID> generate() noexcept; static ox::Result<UUID> generate() noexcept;
[[nodiscard]] [[nodiscard]]
constexpr auto value() const noexcept { constexpr auto const&value() const noexcept {
return m_value; return m_value;
} }
@ -118,8 +120,8 @@ class UUID {
return false; return false;
} else { } else {
constexpr uint64_t zero = 0; constexpr uint64_t zero = 0;
return ox::memcmp(&zero, m_value.data() + 0, 8) == 0 return memcmp(&zero, m_value.data() + 0, 8) == 0
&& ox::memcmp(&zero, m_value.data() + 8, 8) == 0; && memcmp(&zero, m_value.data() + 8, 8) == 0;
} }
} }
@ -192,6 +194,24 @@ class UUID {
} }
}; };
template<>
struct hash<ox::UUID> {
[[nodiscard]]
constexpr size_t operator()(ox::UUID v) const noexcept {
size_t out{};
if (std::is_constant_evaluated()) {
for (auto i = 0u; i < sizeof(out); ++i) {
out |= static_cast<size_t>(v.value()[i]) << (i * 8);
}
} else {
memcpy(&out, &v, sizeof(out));
}
return out;
}
};
template<typename T> template<typename T>
constexpr Error model(T *io, ox::CommonPtrWith<UUID> auto *obj) noexcept { constexpr Error model(T *io, ox::CommonPtrWith<UUID> auto *obj) noexcept {
oxReturnError(io->template setTypeInfo<UUID>()); oxReturnError(io->template setTypeInfo<UUID>());