godot/core/variant/native_ptr.h

/*************************************************************************/
/*  native_ptr.h                                                         */
/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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#ifndef NATIVE_PTR_H
#define NATIVE_PTR_H

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

template <class T>
struct GDNativeConstPtr {
	const T *data = nullptr;
	GDNativeConstPtr(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 <class T>
struct GDNativePtr {
	T *data = nullptr;
	GDNativePtr(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 GDNativeConstPtr<const m_type> {                           \
		const m_type *data = nullptr;                                 \
		GDNativeConstPtr(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 GDNativePtr<m_type> {                                      \
		m_type *data = nullptr;                                       \
		GDNativePtr(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 <class T>
struct GetTypeInfo<GDNativeConstPtr<T>> {
	static const Variant::Type VARIANT_TYPE = Variant::NIL;
	static const GodotTypeInfo::Metadata METADATA = GodotTypeInfo::METADATA_NONE;
	static inline PropertyInfo get_class_info() {
		return PropertyInfo(Variant::INT, String(), PROPERTY_HINT_INT_IS_POINTER, GDNativeConstPtr<T>::get_name());
	}
};

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

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

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)

#endif // NATIVE_PTR_H