godot/core/io/file_access_zip.h

/*************************************************************************/
/*  file_access_zip.h                                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* 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 FILE_ACCESS_ZIP_H
#define FILE_ACCESS_ZIP_H

#ifdef MINIZIP_ENABLED

#include "core/io/file_access_pack.h"
#include "core/templates/map.h"

#include "thirdparty/minizip/unzip.h"

#include <stdlib.h>

class ZipArchive : public PackSource {
public:
	struct File {
		int package = -1;
		unz_file_pos file_pos;
		File() {}
	};

private:
	struct Package {
		String filename;
		unzFile zfile = nullptr;
	};
	Vector<Package> packages;

	Map<String, File> files;

	static ZipArchive *instance;

public:
	void close_handle(unzFile p_file) const;
	unzFile get_file_handle(String p_file) const;

	Error add_package(String p_name);

	bool file_exists(String p_name) const;

	virtual bool try_open_pack(const String &p_path, bool p_replace_files, uint64_t p_offset);
	FileAccess *get_file(const String &p_path, PackedData::PackedFile *p_file);

	static ZipArchive *get_singleton();

	ZipArchive();
	~ZipArchive();
};

class FileAccessZip : public FileAccess {
	unzFile zfile = nullptr;
	unz_file_info64 file_info;

	mutable bool at_eof;

public:
	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(uint64_t p_position); ///< seek to a given position
	virtual void seek_end(int64_t p_position = 0); ///< seek from the end of file
	virtual uint64_t get_position() const; ///< get position in the file
	virtual uint64_t get_length() const; ///< get size of the file

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

	virtual uint8_t get_8() const; ///< get a byte
	virtual uint64_t get_buffer(uint8_t *p_dst, uint64_t p_length) const;

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

	virtual void flush();
	virtual void store_8(uint8_t p_dest); ///< store a byte

	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; } // todo
	virtual uint32_t _get_unix_permissions(const String &p_file) { return 0; }
	virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions) { return FAILED; }

	FileAccessZip(const String &p_path, const PackedData::PackedFile &p_file);
	~FileAccessZip();
};

#endif // MINIZIP_ENABLED

#endif // FILE_ACCESS_ZIP_H