godot/core/packed_data_container.h

/*************************************************************************/
/*  packed_data_container.h                                              */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* 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    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#ifndef PACKED_DATA_CONTAINER_H
#define PACKED_DATA_CONTAINER_H


#include "resource.h"



class PackedDataContainer : public Resource {

	OBJ_TYPE(PackedDataContainer,Resource);

	enum {
		TYPE_DICT=0xFFFFFFFF,
		TYPE_ARRAY=0xFFFFFFFE,
	};

	struct DictKey {
		uint32_t hash;
		Variant key;
		bool operator<(const DictKey& p_key) const { return hash < p_key.hash; }
	};


	DVector<uint8_t> data;
	int datalen;


	uint32_t _pack(const Variant& p_data,Vector<uint8_t>& tmpdata,Map<String,uint32_t>& string_cache);


	Variant _iter_init_ofs(const Array& p_iter,uint32_t p_offset);
	Variant _iter_next_ofs(const Array& p_iter,uint32_t p_offset);
	Variant _iter_get_ofs(const Variant& p_iter,uint32_t p_offset);

	Variant _iter_init(const Array& p_iter);
	Variant _iter_next(const Array& p_iter);
	Variant _iter_get(const Variant& p_iter);

friend class PackedDataContainerRef;
	Variant _key_at_ofs(uint32_t p_ofs,const Variant& p_key,bool &err) const;
	Variant _get_at_ofs(uint32_t p_ofs, const uint8_t *p_buf, bool &err) const;
	uint32_t _type_at_ofs(uint32_t p_ofs) const;
	int _size(uint32_t p_ofs) const;

protected:

	void _set_data(const DVector<uint8_t>& p_data);
	DVector<uint8_t> _get_data() const;
	static void _bind_methods();
public:

	virtual Variant getvar(const Variant& p_key, bool *r_valid=NULL) const;
	Error pack(const Variant& p_data);

	int size() const;

	PackedDataContainer();
};

class PackedDataContainerRef : public Reference {
	OBJ_TYPE(PackedDataContainerRef,Reference);

friend class PackedDataContainer;
	uint32_t offset;
	Ref<PackedDataContainer> from;

protected:
	static void _bind_methods();

public:

	Variant _iter_init(const Array& p_iter);
	Variant _iter_next(const Array& p_iter);
	Variant _iter_get(const Variant& p_iter);
	bool _is_dictionary() const;

	int size() const;
	virtual Variant getvar(const Variant& p_key, bool *r_valid=NULL) const;

	PackedDataContainerRef();
};

#endif // PACKED_DATA_CONTAINER_H