/**************************************************************************/
/*  ref_ptr.cpp                                                           */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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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    */
/* without limitation the rights to use, copy, modify, merge, publish,    */
/* distribute, sublicense, and/or sell copies of the Software, and to     */
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/* included in all copies or substantial portions of the Software.        */
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/**************************************************************************/

#include "ref_ptr.h"

#include "core/reference.h"
#include "core/resource.h"

void RefPtr::operator=(const RefPtr &p_other) {
	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	Ref<Reference> *ref_other = reinterpret_cast<Ref<Reference> *>(const_cast<char *>(&p_other.data[0]));

	*ref = *ref_other;
}

bool RefPtr::operator==(const RefPtr &p_other) const {
	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	Ref<Reference> *ref_other = reinterpret_cast<Ref<Reference> *>(const_cast<char *>(&p_other.data[0]));

	return *ref == *ref_other;
}

bool RefPtr::operator!=(const RefPtr &p_other) const {
	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	Ref<Reference> *ref_other = reinterpret_cast<Ref<Reference> *>(const_cast<char *>(&p_other.data[0]));

	return *ref != *ref_other;
}

RefPtr::RefPtr(const RefPtr &p_other) {
	memnew_placement(&data[0], Ref<Reference>);

	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	Ref<Reference> *ref_other = reinterpret_cast<Ref<Reference> *>(const_cast<char *>(&p_other.data[0]));

	*ref = *ref_other;
}

bool RefPtr::is_null() const {
	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	return ref->is_null();
}

RID RefPtr::get_rid() const {
	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	if (ref->is_null()) {
		return RID();
	}
	Resource *res = Object::cast_to<Resource>(ref->ptr());
	if (res) {
		return res->get_rid();
	}
	return RID();
}

void RefPtr::unref() {
	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	ref->unref();
}

RefPtr::RefPtr() {
	ERR_FAIL_COND(sizeof(Ref<Reference>) > DATASIZE);
	memnew_placement(&data[0], Ref<Reference>);
}

RefPtr::~RefPtr() {
	Ref<Reference> *ref = reinterpret_cast<Ref<Reference> *>(&data[0]);
	ref->~Ref<Reference>();
}
