godot-cpp/include/godot_cpp/core/engine_ptrcall.hpp

/**************************************************************************/
/*  engine_ptrcall.hpp                                                    */
/**************************************************************************/
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#ifndef GODOT_ENGINE_PTRCALL_HPP
#define GODOT_ENGINE_PTRCALL_HPP

#include <gdextension_interface.h>

#include <godot_cpp/core/binder_common.hpp>
#include <godot_cpp/core/object.hpp>
#include <godot_cpp/godot.hpp>

#include <array>

namespace godot {

namespace internal {

template <typename O, typename... Args>
O *_call_native_mb_ret_obj(const GDExtensionMethodBindPtr mb, void *instance, const Args &...args) {
	GodotObject *ret = nullptr;
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
	internal::gdextension_interface_object_method_bind_ptrcall(mb, instance, mb_args.data(), &ret);
	if (ret == nullptr) {
		return nullptr;
	}
	return reinterpret_cast<O *>(internal::get_object_instance_binding(ret));
}

template <typename R, typename... Args>
R _call_native_mb_ret(const GDExtensionMethodBindPtr mb, void *instance, const Args &...args) {
	R ret;
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
	internal::gdextension_interface_object_method_bind_ptrcall(mb, instance, mb_args.data(), &ret);
	return ret;
}

template <typename... Args>
void _call_native_mb_no_ret(const GDExtensionMethodBindPtr mb, void *instance, const Args &...args) {
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
	internal::gdextension_interface_object_method_bind_ptrcall(mb, instance, mb_args.data(), nullptr);
}

template <typename R, typename... Args>
R _call_utility_ret(GDExtensionPtrUtilityFunction func, const Args &...args) {
	R ret;
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
	func(&ret, mb_args.data(), mb_args.size());
	return ret;
}

template <typename... Args>
Object *_call_utility_ret_obj(const GDExtensionPtrUtilityFunction func, const Args &...args) {
	GodotObject *ret = nullptr;
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
	func(&ret, mb_args.data(), mb_args.size());
	return (Object *)internal::get_object_instance_binding(ret);
}

template <typename... Args>
void _call_utility_no_ret(const GDExtensionPtrUtilityFunction func, const Args &...args) {
	std::array<GDExtensionConstTypePtr, sizeof...(Args)> mb_args = { { (GDExtensionConstTypePtr)args... } };
	func(nullptr, mb_args.data(), mb_args.size());
}

} // namespace internal

} // namespace godot

#endif // GODOT_ENGINE_PTRCALL_HPP