native_ptr.h

/**************************************************************************/
/*  native_ptr.h                                                          */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
/* "Software"), to deal in the Software without restriction, including    */
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/* included in all copies or substantial portions of the Software.        */
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#pragma once

#include "core/math/audio_frame.h"
#include "core/variant/binder_common.h"
#include "core/variant/method_ptrcall.h"
#include "core/variant/type_info.h"

template <typename T>
struct GDExtensionConstPtr {
	const T *data = nullptr;
	GDExtensionConstPtr(const T *p_assign) { data = p_assign; }
	static const char *get_name() { return "const void"; }
	operator const T *() const { return data; }
	operator Variant() const { return uint64_t(data); }
};

template <typename T>
struct GDExtensionPtr {
	T *data = nullptr;
	GDExtensionPtr(T *p_assign) { data = p_assign; }
	static const char *get_name() { return "void"; }
	operator T *() const { return data; }
	operator Variant() const { return uint64_t(data); }
};

#define GDVIRTUAL_NATIVE_PTR(m_type) \
	template <> \
	struct GDExtensionConstPtr<const m_type> { \
		const m_type *data = nullptr; \
		GDExtensionConstPtr() {} \
		GDExtensionConstPtr(const m_type *p_assign) { \
			data = p_assign; \
		} \
		static const char *get_name() { \
			return "const " #m_type; \
		} \
		operator const m_type *() const { \
			return data; \
		} \
		operator Variant() const { \
			return uint64_t(data); \
		} \
	}; \
	template <> \
	struct VariantCaster<GDExtensionConstPtr<const m_type>> { \
		static _FORCE_INLINE_ GDExtensionConstPtr<const m_type> cast(const Variant &p_variant) { \
			return GDExtensionConstPtr<const m_type>((const m_type *)p_variant.operator uint64_t()); \
		} \
	}; \
	template <> \
	struct VariantInternalAccessor<GDExtensionConstPtr<const m_type>> { \
		static _FORCE_INLINE_ const GDExtensionConstPtr<const m_type> &get(const Variant *v) { \
			return *reinterpret_cast<const GDExtensionConstPtr<const m_type> *>(VariantInternal::get_int(v)); \
		} \
		static _FORCE_INLINE_ void set(Variant *v, const GDExtensionConstPtr<const m_type> &p_value) { \
			*VariantInternal::get_int(v) = uint64_t(p_value.data); \
		} \
	}; \
	template <> \
	struct GDExtensionPtr<m_type> { \
		m_type *data = nullptr; \
		GDExtensionPtr() {} \
		GDExtensionPtr(m_type *p_assign) { \
			data = p_assign; \
		} \
		static const char *get_name() { \
			return #m_type; \
		} \
		operator m_type *() const { \
			return data; \
		} \
		operator Variant() const { \
			return uint64_t(data); \
		} \
	}; \
	template <> \
	struct VariantCaster<GDExtensionPtr<m_type>> { \
		static _FORCE_INLINE_ GDExtensionPtr<m_type> cast(const Variant &p_variant) { \
			return GDExtensionPtr<m_type>((m_type *)p_variant.operator uint64_t()); \
		} \
	}; \
	template <> \
	struct VariantInternalAccessor<GDExtensionPtr<m_type>> { \
		static _FORCE_INLINE_ const GDExtensionPtr<m_type> &get(const Variant *v) { \
			return *reinterpret_cast<const GDExtensionPtr<m_type> *>(VariantInternal::get_int(v)); \
		} \
		static _FORCE_INLINE_ void set(Variant *v, const GDExtensionPtr<m_type> &p_value) { \
			*VariantInternal::get_int(v) = uint64_t(p_value.data); \
		} \
	};

template <typename T>
struct GetTypeInfo<GDExtensionConstPtr<T>> {
	static const Variant::Type VARIANT_TYPE = Variant::INT;
	static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE;
	static inline PropertyInfo get_class_info() {
		return PropertyInfo(Variant::INT, String(), PROPERTY_HINT_INT_IS_POINTER, GDExtensionConstPtr<T>::get_name());
	}
};

template <typename T>
struct GetTypeInfo<GDExtensionPtr<T>> {
	static const Variant::Type VARIANT_TYPE = Variant::INT;
	static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE;
	static inline PropertyInfo get_class_info() {
		return PropertyInfo(Variant::INT, String(), PROPERTY_HINT_INT_IS_POINTER, GDExtensionPtr<T>::get_name());
	}
};

template <typename T>
struct PtrToArg<GDExtensionConstPtr<T>> {
	_FORCE_INLINE_ static GDExtensionConstPtr<T> convert(const void *p_ptr) {
		return GDExtensionConstPtr<T>(reinterpret_cast<const T *>(p_ptr));
	}
	typedef const T *EncodeT;
	_FORCE_INLINE_ static void encode(GDExtensionConstPtr<T> p_val, void *p_ptr) {
		*((const T **)p_ptr) = p_val.data;
	}
};
template <typename T>
struct PtrToArg<GDExtensionPtr<T>> {
	_FORCE_INLINE_ static GDExtensionPtr<T> convert(const void *p_ptr) {
		return GDExtensionPtr<T>(reinterpret_cast<const T *>(p_ptr));
	}
	typedef T *EncodeT;
	_FORCE_INLINE_ static void encode(GDExtensionPtr<T> p_val, void *p_ptr) {
		*((T **)p_ptr) = p_val.data;
	}
};

GDVIRTUAL_NATIVE_PTR(void)
GDVIRTUAL_NATIVE_PTR(AudioFrame)
GDVIRTUAL_NATIVE_PTR(bool)
GDVIRTUAL_NATIVE_PTR(char)
GDVIRTUAL_NATIVE_PTR(char16_t)
GDVIRTUAL_NATIVE_PTR(char32_t)
GDVIRTUAL_NATIVE_PTR(wchar_t)
GDVIRTUAL_NATIVE_PTR(uint8_t)
GDVIRTUAL_NATIVE_PTR(uint8_t *)
GDVIRTUAL_NATIVE_PTR(int8_t)
GDVIRTUAL_NATIVE_PTR(uint16_t)
GDVIRTUAL_NATIVE_PTR(int16_t)
GDVIRTUAL_NATIVE_PTR(uint32_t)
GDVIRTUAL_NATIVE_PTR(int32_t)
GDVIRTUAL_NATIVE_PTR(int64_t)
GDVIRTUAL_NATIVE_PTR(uint64_t)
GDVIRTUAL_NATIVE_PTR(float)
GDVIRTUAL_NATIVE_PTR(double)