ObjFW  Artifact [d3ecafe11e]

Artifact d3ecafe11ec8548748f2caef64a621df0bea5336bd189d2ed225c014e151f441:

• File src/OFZIPArchiveEntry.m — part of check-in [48980f2297] at 2015-11-29 11:43:05 on branch trunk — Make properties a requirement and clean up code

  This increases the required GCC version from 4.0 to 4.6 (exception:
  Apple GCC, which already supports this with >= 4.0 starting with OS X
  10.5). Since even GCC 4.6 is really old by now, there is no point in
  still supporting something even older and making the code ugly because
  of that. While some hardware and OS support was dropped from GCC 4.6
  compared to GCC 4.0, there is nothing in there that would be an
  interesting target with the exception of BeOS maybe - but a port to BeOS
  can also be achieved using the Haiku support. The other dropped OSes are
  mostly old versions of OSes while newer ones are still being supported
  (and those newer versions of those OSes still support the same
  hardware). (user: js, size: 8621) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * 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 "OFZIPArchiveEntry.h"
#import "OFZIPArchiveEntry+Private.h"
#import "OFString.h"
#import "OFDataArray.h"
#import "OFFile.h"
#import "OFDate.h"

#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"

extern uint32_t of_zip_archive_read_field32(uint8_t**, uint16_t*);
extern uint64_t of_zip_archive_read_field64(uint8_t**, uint16_t*);

OFString*
of_zip_archive_entry_version_to_string(uint16_t version)
{
	const char *attrCompat = NULL;

	switch (version >> 8) {
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_MSDOS:
		attrCompat = "MS-DOS or OS/2";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_AMIGA:
		attrCompat = "Amiga";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_OPENVMS:
		attrCompat = "OpenVMS";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_UNIX:
		attrCompat = "UNIX";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_VM_CMS:
		attrCompat = "VM/CMS";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_ATARI_ST:
		attrCompat = "Atari ST";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_OS2_HPFS:
		attrCompat = "OS/2 HPFS";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_MACINTOSH:
		attrCompat = "Macintosh";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_Z_SYSTEM:
		attrCompat = "Z-System";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_CP_M:
		attrCompat = "CP/M";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_WINDOWS_NTFS:
		attrCompat = "Windows NTFS";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_MVS:
		attrCompat = "MVS (OS/390 - Z/OS)";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_VSE:
		attrCompat = "VSE";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_ACORN_RISC:
		attrCompat = "Acorn Risc";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_VFAT:
		attrCompat = "VFAT";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_ALTERNATE_MVS:
		attrCompat = "Alternate MVS";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_BEOS:
		attrCompat = "BeOS";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_TANDEM:
		attrCompat = "Tandem";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_OS_400:
		attrCompat = "OS/400";
		break;
	case OF_ZIP_ARCHIVE_ENTRY_ATTR_COMPAT_OS_X:
		attrCompat = "OS X (Darwin)";
		break;
	}

	if (attrCompat != NULL)
		return [OFString stringWithFormat:
		    @"%u.%u, %s",
		    (version & 0xFF) / 10, (version & 0xFF) % 10, attrCompat];
	else
		return [OFString stringWithFormat:
		    @"%u.%u, unknown %02X",
		    (version % 0xFF) / 10, (version & 0xFF) % 10, version >> 8];
}

void
of_zip_archive_entry_extra_field_find(OFDataArray *extraField, uint16_t tag,
    uint8_t **data, uint16_t *size)
{
	uint8_t *bytes;
	size_t i, count;

	bytes = [extraField items];
	count = [extraField count];

	for (i = 0; i < count;) {
		uint16_t currentTag, currentSize;

		if (i + 3 >= count)
			@throw [OFInvalidFormatException exception];

		currentTag = (bytes[i + 1] << 8) | bytes[i];
		currentSize = (bytes[i + 3] << 8) | bytes[i + 2];

		if (i + 3 + currentSize >= count)
			@throw [OFInvalidFormatException exception];

		if (currentTag == tag) {
			*data = bytes + i + 4;
			*size = currentSize;
			return;
		}

		i += 4 + currentSize;
	}

	*data = NULL;
	*size = 0;
}

@implementation OFZIPArchiveEntry
@synthesize fileName = _fileName, fileComment = _fileComment;
@synthesize versionMadeBy = _versionMadeBy;
@synthesize minVersionNeeded = _minVersionNeeded;
@synthesize compressionMethod = _compressionMethod;
@synthesize compressedSize = _compressedSize;
@synthesize uncompressedSize = _uncompressedSize;
@synthesize CRC32 = _CRC32;
@synthesize versionSpecificAttributes = _versionSpecificAttributes;
@synthesize OF_generalPurposeBitFlag = _generalPurposeBitFlag;
@synthesize OF_lastModifiedFileTime = _lastModifiedFileTime;
@synthesize OF_lastModifiedFileDate = _lastModifiedFileDate;
@synthesize OF_localFileHeaderOffset = _localFileHeaderOffset;

- (instancetype)OF_initWithStream: (OFStream*)stream
{
	self = [super init];

	@try {
		void *pool = objc_autoreleasePoolPush();
		uint16_t fileNameLength, extraFieldLength, fileCommentLength;
		of_string_encoding_t encoding;
		uint8_t *ZIP64 = NULL;
		uint16_t ZIP64Size;

		if ([stream readLittleEndianInt32] != 0x02014B50)
			@throw [OFInvalidFormatException exception];

		_versionMadeBy = [stream readLittleEndianInt16];
		_minVersionNeeded = [stream readLittleEndianInt16];
		_generalPurposeBitFlag = [stream readLittleEndianInt16];
		_compressionMethod = [stream readLittleEndianInt16];
		_lastModifiedFileTime = [stream readLittleEndianInt16];
		_lastModifiedFileDate = [stream readLittleEndianInt16];
		_CRC32 = [stream readLittleEndianInt32];
		_compressedSize = [stream readLittleEndianInt32];
		_uncompressedSize = [stream readLittleEndianInt32];
		fileNameLength = [stream readLittleEndianInt16];
		extraFieldLength = [stream readLittleEndianInt16];
		fileCommentLength = [stream readLittleEndianInt16];
		_startDiskNumber = [stream readLittleEndianInt16];
		_internalAttributes = [stream readLittleEndianInt16];
		_versionSpecificAttributes = [stream readLittleEndianInt32];
		_localFileHeaderOffset = [stream readLittleEndianInt32];

		encoding = (_generalPurposeBitFlag & (1 << 11)
		    ? OF_STRING_ENCODING_UTF_8
		    : OF_STRING_ENCODING_CODEPAGE_437);

		_fileName = [[stream readStringWithLength: fileNameLength
						 encoding: encoding] copy];
		_extraField = [[stream
		    readDataArrayWithCount: extraFieldLength] retain];
		_fileComment = [[stream readStringWithLength: fileCommentLength
						    encoding: encoding] copy];

		of_zip_archive_entry_extra_field_find(_extraField,
		    OF_ZIP_ARCHIVE_ENTRY_EXTRA_FIELD_ZIP64, &ZIP64, &ZIP64Size);

		if (ZIP64 != NULL) {
			if (_uncompressedSize == 0xFFFFFFFF)
				_uncompressedSize = of_zip_archive_read_field64(
				    &ZIP64, &ZIP64Size);
			if (_compressedSize == 0xFFFFFFFF)
				_compressedSize = of_zip_archive_read_field64(
				    &ZIP64, &ZIP64Size);
			if (_localFileHeaderOffset == 0xFFFFFFFF)
				_localFileHeaderOffset =
				    of_zip_archive_read_field64(&ZIP64,
				    &ZIP64Size);
			if (_startDiskNumber == 0xFFFF)
				_startDiskNumber = of_zip_archive_read_field32(
				    &ZIP64, &ZIP64Size);

			if (ZIP64Size > 0)
				@throw [OFInvalidFormatException exception];
		}

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

	return self;
}

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

	[super dealloc];
}

- (OFDate*)modificationDate
{
	void *pool = objc_autoreleasePoolPush();
	uint_fast16_t year = ((_lastModifiedFileDate & 0xFE00) >> 9) + 1980;
	uint_fast8_t month = (_lastModifiedFileDate & 0x1E0) >> 5;
	uint_fast8_t day = (_lastModifiedFileDate & 0x1F);
	uint_fast8_t hour = (_lastModifiedFileTime & 0xF800) >> 11;
	uint_fast8_t minute = (_lastModifiedFileTime & 0x7E0) >> 5;
	uint_fast8_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];
}

- (OFDataArray*)extraField
{
	return [[_extraField copy] autorelease];
}

- (OFString*)description
{
	void *pool = objc_autoreleasePoolPush();
	OFDate *modificationDate = [self modificationDate];
	OFString *ret;

	ret = [[OFString alloc] initWithFormat: @"<%@: %p\n"
	    @"\tFile name = %@\n"
	    @"\tFile comment = %@\n"
	    @"\tGeneral purpose bit flag = %u\n"
	    @"\tCompression method = %u\n"
	    @"\tCompressed size = %ju\n"
	    @"\tUncompressed size = %ju\n"
	    @"\tModification date = %@\n"
	    @"\tCRC32 = %" @PRIu32 @"\n"
	    @"\tExtra field = %@\n"
	    @"}",
	    [self class], self, _fileName, _fileComment, _generalPurposeBitFlag,
	    _compressionMethod, (intmax_t)_compressedSize,
	    (intmax_t)_uncompressedSize, modificationDate, _CRC32, _extraField];

	objc_autoreleasePoolPop(pool);

	return [ret autorelease];
}
@end