ObjFW  Artifact [01c49327d9]

Artifact 01c49327d99799883d425e4171e487f632bf9d4460d0a4f6dcbbec90824ad54d:

• File src/OFZooArchiveEntry.m — part of check-in [9a95da71d5] at 2024-02-28 00:24:42 on branch trunk — Add OFZooArchive

  Only support for reading so far.

  Compression methods 0 (uncompressed) and 2 (LZ77 + Huffman, apparently
  identical to lh4/lh5) are supported. (user: js, size: 4064) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#import "OFZooArchiveEntry.h"
#import "OFZooArchiveEntry+Private.h"
#import "OFDate.h"
#import "OFSeekableStream.h"
#import "OFStream.h"
#import "OFString.h"

#import "OFInvalidFormatException.h"

@implementation OFZooArchiveEntry
@synthesize compressionMethod = _compressionMethod, CRC16 = _CRC16;
@synthesize uncompressedSize = _uncompressedSize;
@synthesize compressedSize = _compressedSize, deleted = _deleted;
@synthesize fileComment = _fileComment, fileName = _fileName;

- (instancetype)init
{
	OF_INVALID_INIT_METHOD
}

- (instancetype)of_initWithStream: (OF_KINDOF(OFStream *))stream
			 encoding: (OFStringEncoding)encoding
{
	self = [super init];

	@try {
		void *pool = objc_autoreleasePoolPush();
		uint32_t commentOffset;
		uint16_t commentLength;

		if ([stream readLittleEndianInt32] != 0xFDC4A7DC)
			@throw [OFInvalidFormatException exception];

		/* Type seems to be always 2 */
		if ([stream readInt8] != 2)
			@throw [OFInvalidFormatException exception];

		_compressionMethod = [stream readInt8];
		_nextHeaderOffset = [stream readLittleEndianInt32];
		_dataOffset = [stream readLittleEndianInt32];
		_lastModifiedFileDate = [stream readLittleEndianInt16];
		_lastModifiedFileTime = [stream readLittleEndianInt16];
		_CRC16 = [stream readLittleEndianInt16];
		_uncompressedSize = [stream readLittleEndianInt32];
		_compressedSize = [stream readLittleEndianInt32];
		/* Version */
		[stream readBigEndianInt16];
		_deleted = [stream readInt8];
		/* Unknown. Most likely padding to get to 2 byte alignment? */
		[stream readInt8];
		commentOffset = [stream readLittleEndianInt32];
		commentLength = [stream readLittleEndianInt16];

		_fileName = [[stream readLineWithEncoding: encoding] retain];

		if (commentOffset != 0) {
			[stream seekToOffset: commentOffset whence: OFSeekSet];
			_fileComment = [[stream
			    readStringWithLength: commentLength
					encoding: encoding] retain];
		}

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	[_fileComment release];
	[_fileName release];

	[super dealloc];
}

- (id)copy
{
	return [self retain];
}

- (OFDate *)modificationDate
{
	void *pool = objc_autoreleasePoolPush();
	uint16_t year = ((_lastModifiedFileDate & 0xFE00) >> 9) + 1980;
	uint8_t month = (_lastModifiedFileDate & 0x1E0) >> 5;
	uint8_t day = (_lastModifiedFileDate & 0x1F);
	uint8_t hour = (_lastModifiedFileTime & 0xF800) >> 11;
	uint8_t minute = (_lastModifiedFileTime & 0x7E0) >> 5;
	uint8_t second = (_lastModifiedFileTime & 0x1F) << 1;
	OFDate *date;
	OFString *dateString;

	dateString = [OFString
	    stringWithFormat: @"%04u-%02u-%02u %02u:%02u:%02u",
			      year, month, day, hour, minute, second];

	date = [[OFDate alloc] initWithLocalDateString: dateString
						format: @"%Y-%m-%d %H:%M:%S"];

	objc_autoreleasePoolPop(pool);

	return [date autorelease];
}

- (OFString *)description
{
	void *pool = objc_autoreleasePoolPush();
	OFString *ret = [OFString stringWithFormat:
	    @"<%@: \n"
	    @"\tFile name = %@\n"
	    @"\tFile comment = %@\n"
	    @"\tCompressed size = %llu\n"
	    @"\tUncompressed size = %llu\n"
	    @"\tCompression method = %u\n"
	    @"\tModification date = %@\n"
	    @"\tCRC16 = %04" @PRIX16 @"\n"
	    @"\tDeleted = %u\n"
	    @">",
	    self.class, _fileName, _fileComment, _compressedSize,
	    _uncompressedSize, _compressionMethod, self.modificationDate,
	    _CRC16, _deleted];

	[ret retain];

	objc_autoreleasePoolPop(pool);

	return [ret autorelease];
}
@end