ObjFW  Diff

/*
 * 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.
 *

#import "OFLHAArchiveEntry.h"
#import "OFLHAArchiveEntry+Private.h"
#import "OFArray.h"
#import "OFCRC16.h"
#import "OFData.h"
#import "OFDate.h"
#import "OFNumber.h"
#import "OFSeekableStream.h"
#import "OFStream.h"
#import "OFString.h"

#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfRangeException.h"
#import "OFUnsupportedVersionException.h"

			 encoding: (OFStringEncoding)encoding
{
	self = [super init];

	@try {
		uint32_t date;










		memcpy(&_compressedSize, header + 7, 4);
		_compressedSize =
		    OFFromLittleEndian32((uint32_t)_compressedSize);

		memcpy(&_uncompressedSize, header + 11, 4);
		_uncompressedSize =
		    OFFromLittleEndian32((uint32_t)_uncompressedSize);

		memcpy(&date, header + 15, 4);
		date = OFFromLittleEndian32(date);

		_headerLevel = header[20];
		_extensions = [[OFMutableArray alloc] init];

		switch (_headerLevel) {
		case 0:
		case 1:;
			void *pool = objc_autoreleasePoolPush();
			uint8_t extendedAreaSize;
			uint8_t fileNameLength;
			OFString *tmp;

			if (header[0] < (21 - 2) + 1 + 2)
				@throw [OFInvalidFormatException exception];

			_modificationDate = [parseMSDOSDate(date) retain];

			fileNameLength = [stream readInt8];
			tmp = [stream readStringWithLength: fileNameLength
						  encoding: encoding];
			tmp = [tmp stringByReplacingOccurrencesOfString: @"\\"
							     withString: @"/"];
			_fileName = [tmp copy];

			_CRC16 = [stream readLittleEndianInt16];

			extendedAreaSize =
			    header[0] - (21 - 2) - 1 - fileNameLength - 2;

			if (_headerLevel == 1) {
				if (extendedAreaSize < 3)
					@throw [OFInvalidFormatException
					    exception];

				_operatingSystemIdentifier = [stream readInt8];

				/*
				 * 1 for the operating system identifier, 2
				 * because we don't want to skip the size of
				 * the next extended header.
				 */
				extendedAreaSize -= 1 + 2;
			}

			/* Skip extended area. */
			if ([stream isKindOfClass: [OFSeekableStream class]])
				[(OFSeekableStream *)stream
				    seekToOffset: extendedAreaSize
					  whence: OFSeekCurrent];
			else {
				char buffer[256];

				while (extendedAreaSize > 0)
					extendedAreaSize -= [stream
					    readIntoBuffer: buffer
						    length: extendedAreaSize];
			}

			if (_headerLevel == 1)
				readExtensions(self, stream, encoding, false);

			objc_autoreleasePoolPop(pool);
			break;
		case 2:
			_modificationDate = [[OFDate alloc]
			    initWithTimeIntervalSince1970: date];

			_CRC16 = [stream readLittleEndianInt16];

			@throw [OFUnsupportedVersionException
			    exceptionWithVersion: version];
		}

		if (_fileName == nil)
			@throw [OFInvalidFormatException exception];

		_compressionMethod = [[OFString alloc]
		    initWithCString: header + 2
			   encoding: OFStringEncodingASCII
			     length: 5];

		[_extensions makeImmutable];
	} @catch (id e) {
		[self release];
		@throw e;
	}