/*************************************************************************/
/*  file_access_memory.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:                                             */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/*************************************************************************/
#ifndef FILE_ACCESS_MEMORY_H
#define FILE_ACCESS_MEMORY_H

#include "os/file_access.h"

class FileAccessMemory : public FileAccess {

	uint8_t *data;
	int length;
	mutable int pos;

	static FileAccess *create();

public:
	static void register_file(String p_name, Vector<uint8_t> p_data);
	static void cleanup();

	virtual Error open_custom(const uint8_t *p_data, int p_len); ///< open a file
	virtual Error _open(const String &p_path, int p_mode_flags); ///< open a file
	virtual void close(); ///< close a file
	virtual bool is_open() const; ///< true when file is open

	virtual void seek(size_t p_position); ///< seek to a given position
	virtual void seek_end(int64_t p_position); ///< seek from the end of file
	virtual size_t get_pos() const; ///< get position in the file
	virtual size_t get_len() const; ///< get size of the file

	virtual bool eof_reached() const; ///< reading passed EOF

	virtual uint8_t get_8() const; ///< get a byte

	virtual int get_buffer(uint8_t *p_dst, int p_length) const; ///< get an array of bytes

	virtual Error get_error() const; ///< get last error

	virtual void store_8(uint8_t p_dest); ///< store a byte
	virtual void store_buffer(const uint8_t *p_src, int p_length); ///< store an array of bytes

	virtual bool file_exists(const String &p_name); ///< return true if a file exists

	virtual uint64_t _get_modified_time(const String &p_file) { return 0; }

	FileAccessMemory();
};

#endif // FILE_ACCESS_MEMORY_H