初始化内容

third/LuaBridge3/Source/LuaBridge/detail/ClassInfo.h

@@ -0,0 +1,259 @@
+// https://github.com/kunitoki/LuaBridge3
+// Copyright 2020, kunitoki
+// Copyright 2020, Dmitry Tarakanov
+// Copyright 2012, Vinnie Falco <vinnie.falco@gmail.com>
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include "Config.h"
+
+#include <cstdint>
+#include <memory>
+#include <string_view>
+
+#if defined __clang__ || defined __GNUC__
+#define LUABRIDGE_PRETTY_FUNCTION __PRETTY_FUNCTION__
+#define LUABRIDGE_PRETTY_FUNCTION_PREFIX '='
+#define LUABRIDGE_PRETTY_FUNCTION_SUFFIX ']'
+#elif defined _MSC_VER
+#define LUABRIDGE_PRETTY_FUNCTION __FUNCSIG__
+#define LUABRIDGE_PRETTY_FUNCTION_PREFIX '<'
+#define LUABRIDGE_PRETTY_FUNCTION_SUFFIX '>'
+#endif
+
+namespace luabridge {
+namespace detail {
+
+[[nodiscard]] constexpr auto fnv1a(const char* s, std::size_t count) noexcept
+{
+    uint32_t seed = 2166136261u;
+
+    for (std::size_t i = 0; i < count; ++i)
+        seed = static_cast<uint32_t>(static_cast<uint32_t>(seed ^ static_cast<uint8_t>(*s++)) * 16777619u);
+
+    if constexpr (sizeof(void*) == 8)
+        return static_cast<uint64_t>(seed);
+    else
+        return seed;
+}
+
+template <class T>
+[[nodiscard]] static constexpr auto typeName(T* = nullptr) noexcept
+{
+    constexpr std::string_view prettyName{ LUABRIDGE_PRETTY_FUNCTION };
+
+    constexpr auto first = prettyName.find_first_not_of(' ', prettyName.find_first_of(LUABRIDGE_PRETTY_FUNCTION_PREFIX) + 1);
+
+    return prettyName.substr(first, prettyName.find_last_of(LUABRIDGE_PRETTY_FUNCTION_SUFFIX) - first);
+}
+
+template <class T, auto = typeName<T>().find_first_of('.')>
+[[nodiscard]] static constexpr auto typeHash(T* = nullptr) noexcept
+{
+    constexpr auto stripped = typeName<T>();
+
+    return fnv1a(stripped.data(), stripped.size());
+}
+
+//=================================================================================================
+/**
+ * @brief A unique key for the exceptions in the registry.
+ */
+[[nodiscard]] inline void* getExceptionsKey() noexcept
+{
+    return reinterpret_cast<void*>(0xc7);
+}
+
+//=================================================================================================
+/**
+ * @brief A unique key for a type name in a metatable.
+ */
+[[nodiscard]] inline const void* getTypeKey() noexcept
+{
+    return reinterpret_cast<void*>(0x71);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a const table in another metatable.
+ */
+[[nodiscard]] inline const void* getConstKey() noexcept
+{
+    return reinterpret_cast<void*>(0xc07);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a class table in another metatable.
+ */
+[[nodiscard]] inline const void* getClassKey() noexcept
+{
+    return reinterpret_cast<void*>(0xc1a);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a class options table in another metatable.
+ */
+[[nodiscard]] inline const void* getClassOptionsKey() noexcept
+{
+    return reinterpret_cast<void*>(0xc2b);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a type identity tag in class/const metatables.
+ */
+[[nodiscard]] inline const void* getTypeIdentityKey() noexcept
+{
+    return reinterpret_cast<void*>(0xc2c);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a propget table in another metatable.
+ */
+[[nodiscard]] inline const void* getPropgetKey() noexcept
+{
+    return reinterpret_cast<void*>(0x6e7);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a propset table in another metatable.
+ */
+[[nodiscard]] inline const void* getPropsetKey() noexcept
+{
+    return reinterpret_cast<void*>(0x5e7);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a static table in another metatable.
+ */
+[[nodiscard]] inline const void* getStaticKey() noexcept
+{
+    return reinterpret_cast<void*>(0x57a);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a parent table in another metatable.
+ */
+[[nodiscard]] inline const void* getParentKey() noexcept
+{
+    return reinterpret_cast<void*>(0xdad);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a cast offset table in a derived class metatable.
+ *
+ * Maps base class registry keys to byte offsets for pointer adjustment when converting
+ * a derived class pointer to a base class pointer in multiple inheritance scenarios.
+ */
+[[nodiscard]] inline const void* getCastTableKey() noexcept
+{
+    return reinterpret_cast<void*>(0xca57);
+}
+
+//=================================================================================================
+/**
+ * The key of the index fall back in another metatable.
+ */
+[[nodiscard]] inline const void* getIndexFallbackKey()
+{
+    return reinterpret_cast<void*>(0x81ca);
+}
+
+[[nodiscard]] inline const void* getIndexExtensibleKey()
+{
+    return reinterpret_cast<void*>(0x81cb);
+}
+
+//=================================================================================================
+/**
+ * The key of the new index fall back in another metatable.
+ */
+[[nodiscard]] inline const void* getNewIndexFallbackKey()
+{
+    return reinterpret_cast<void*>(0x8107);
+}
+
+[[nodiscard]] inline const void* getNewIndexExtensibleKey()
+{
+    return reinterpret_cast<void*>(0x8108);
+}
+
+//=================================================================================================
+/**
+ * @brief The key of a ConverterRegistry userdata in a class metatable.
+ */
+[[nodiscard]] inline const void* getConvertersKey() noexcept
+{
+    return reinterpret_cast<void*>(0xc0de);
+}
+
+//=================================================================================================
+/**
+ * The key of the static index fall back in another metatable.
+ */
+[[nodiscard]] inline const void* getStaticIndexFallbackKey()
+{
+    return reinterpret_cast<void*>(0x81cc);
+}
+
+//=================================================================================================
+/**
+ * The key of the static new index fall back in another metatable.
+ */
+[[nodiscard]] inline const void* getStaticNewIndexFallbackKey()
+{
+    return reinterpret_cast<void*>(0x8109);
+}
+
+//=================================================================================================
+/**
+ * @brief Get the key for the static table in the Lua registry.
+ *
+ * The static table holds the static data members, static properties, and static member functions for a class.
+ */
+template <class T>
+[[nodiscard]] const void* getStaticRegistryKey() noexcept
+{
+    static auto value = typeHash<T>();
+
+    return reinterpret_cast<void*>(value);
+}
+
+//=================================================================================================
+/**
+ * @brief Get the key for the class table in the Lua registry.
+ *
+ * The class table holds the data members, properties, and member functions of a class. Read-only data and properties, and const
+ * member functions are also placed here (to save a lookup in the const table).
+ */
+template <class T>
+[[nodiscard]] const void* getClassRegistryKey() noexcept
+{
+    static auto value = typeHash<T>() ^ 1;
+
+    return reinterpret_cast<void*>(value);
+}
+
+//=================================================================================================
+/**
+ * @brief Get the key for the const table in the Lua registry.
+ *
+ * The const table holds read-only data members and properties, and const member functions of a class.
+ */
+template <class T>
+[[nodiscard]] const void* getConstRegistryKey() noexcept
+{
+    static auto value = typeHash<T>() ^ 2;
+
+    return reinterpret_cast<void*>(value);
+}
+} // namespace detail
+} // namespace luabridge