/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018
* Jonathan Schleifer <js@heap.zone>
*
* 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"
#define OF_LHA_ARCHIVE_ENTRY_M
#import "OFLHAArchiveEntry.h"
#import "OFLHAArchiveEntry+Private.h"
#import "OFArray.h"
#import "OFData.h"
#import "OFDate.h"
#import "OFNumber.h"
#import "OFStream.h"
#import "OFString.h"
#import "OFInvalidFormatException.h"
#import "OFUnsupportedVersionException.h"
static OFDate *
parseMSDOSDate(uint32_t MSDOSDate)
{
uint16_t year = ((MSDOSDate & 0xFE000000) >> 25) + 1980;
uint8_t month = (MSDOSDate & 0x1E00000) >> 21;
uint8_t day = (MSDOSDate & 0x1F);
uint8_t hour = (MSDOSDate & 0xF800) >> 11;
uint8_t minute = (MSDOSDate & 0x7E0) >> 5;
uint8_t second = (MSDOSDate & 0x1F) << 1;
OFString *dateString;
dateString = [OFString
stringWithFormat: @"%04u-%02u-%02u %02u:%02u:%02u",
year, month, day, hour, minute, second];
return [OFDate dateWithLocalDateString: dateString
format: @"%Y-%m-%d %H:%M:%S"];
}
static void
parseFileNameExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding)
{
[entry->_fileName release];
entry->_fileName = nil;
entry->_fileName = [[OFString alloc]
initWithCString: (char *)[extension items] + 1
encoding: encoding
length: [extension count] - 1];
}
static void
parseDirectoryNameExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding)
{
void *pool = objc_autoreleasePoolPush();
OFMutableData *data = [[extension mutableCopy] autorelease];
char *items = [data items];
size_t count = [data count];
OFMutableString *directoryName;
for (size_t i = 1; i < count; i++)
if (items[i] == '\xFF')
items[i] = '/';
directoryName = [OFMutableString stringWithCString: items + 1
encoding: encoding
length: count - 1];
if (![directoryName hasSuffix: @"/"])
[directoryName appendString: @"/"];
[directoryName makeImmutable];
[entry->_directoryName release];
entry->_directoryName = nil;
entry->_directoryName = [directoryName copy];
objc_autoreleasePoolPop(pool);
}
static void
parseCommentExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding)
{
[entry->_fileComment release];
entry->_fileComment = nil;
entry->_fileComment = [[OFString alloc]
initWithCString: (char *)[extension items] + 1
encoding: encoding
length: [extension count] - 1];
}
static void
parsePermissionsExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding)
{
uint16_t mode;
if ([extension count] != 3)
@throw [OFInvalidFormatException exception];
memcpy(&mode, (char *)[extension items] + 1, 2);
mode = OF_BSWAP16_IF_BE(mode);
[entry->_mode release];
entry->_mode = nil;
entry->_mode = [[OFNumber alloc] initWithUInt16: mode];
}
static void
parseGIDUIDExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding)
{
uint16_t UID, GID;
if ([extension count] != 5)
@throw [OFInvalidFormatException exception];
memcpy(&GID, (char *)[extension items] + 1, 2);
GID = OF_BSWAP16_IF_BE(GID);
memcpy(&UID, (char *)[extension items] + 3, 2);
UID = OF_BSWAP16_IF_BE(UID);
[entry->_GID release];
entry->_GID = nil;
[entry->_UID release];
entry->_UID = nil;
entry->_GID = [[OFNumber alloc] initWithUInt16: GID];
entry->_UID = [[OFNumber alloc] initWithUInt16: UID];
}
static void
parseGroupExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding)
{
[entry->_group release];
entry->_group = nil;
entry->_group = [[OFString alloc]
initWithCString: (char *)[extension items] + 1
encoding: encoding
length: [extension count] - 1];
}
static void
parseOwnerExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding)
{
[entry->_owner release];
entry->_owner = nil;
entry->_owner = [[OFString alloc]
initWithCString: (char *)[extension items] + 1
encoding: encoding
length: [extension count] - 1];
}
static void
parseModificationDateExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding)
{
uint32_t modificationDate;
if ([extension count] != 5)
@throw [OFInvalidFormatException exception];
memcpy(&modificationDate, (char *)[extension items] + 1, 4);
modificationDate = OF_BSWAP32_IF_BE(modificationDate);
[entry->_modificationDate release];
entry->_modificationDate = nil;
entry->_modificationDate = [[OFDate alloc]
initWithTimeIntervalSince1970: modificationDate];
}
static bool
parseExtension(OFLHAArchiveEntry *entry, OFData *extension,
of_string_encoding_t encoding, bool allowFileName)
{
void (*function)(OFLHAArchiveEntry *, OFData *, of_string_encoding_t) =
NULL;
switch (*(char *)[extension itemAtIndex: 0]) {
case 0x01:
if (allowFileName)
function = parseFileNameExtension;
break;
case 0x02:
function = parseDirectoryNameExtension;
break;
case 0x3F:
function = parseCommentExtension;
break;
case 0x50:
function = parsePermissionsExtension;
break;
case 0x51:
function = parseGIDUIDExtension;
break;
case 0x52:
function = parseGroupExtension;
break;
case 0x53:
function = parseOwnerExtension;
break;
case 0x54:
function = parseModificationDateExtension;
break;
}
if (function == NULL)
return false;
function(entry, extension, encoding);
return true;
}
static void
readExtensions(OFLHAArchiveEntry *entry, OFStream *stream,
of_string_encoding_t encoding, bool allowFileName)
{
uint16_t size;
while ((size = [stream readLittleEndianInt16]) > 0) {
OFData *extension;
if (size < 2)
@throw [OFInvalidFormatException exception];
extension = [stream readDataWithCount: size - 2];
if (!parseExtension(entry, extension, encoding, allowFileName))
[entry->_extensions addObject: extension];
if (entry->_level == 1) {
if (entry->_compressedSize < size)
@throw [OFInvalidFormatException exception];
entry->_compressedSize -= size;
}
}
}
@implementation OFLHAArchiveEntry
@synthesize method = _method, compressedSize = _compressedSize;
@synthesize uncompressedSize = _uncompressedSize, date = _date;
@synthesize level = _level, CRC16 = _CRC16;
@synthesize operatingSystemIdentifier = _operatingSystemIdentifier;
@synthesize fileComment = _fileComment, mode = _mode, UID = _UID, GID = _GID;
@synthesize owner = _owner, group = _group;
@synthesize modificationDate = _modificationDate, extensions = _extensions;
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)of_initWithHeader: (char [21])header
stream: (OFStream *)stream
encoding: (of_string_encoding_t)encoding
{
self = [super init];
@try {
uint32_t date;
_method = [[OFString alloc]
initWithCString: header + 2
encoding: OF_STRING_ENCODING_ASCII
length: 5];
memcpy(&_compressedSize, header + 7, 4);
_compressedSize = OF_BSWAP32_IF_BE(_compressedSize);
memcpy(&_uncompressedSize, header + 11, 4);
_uncompressedSize = OF_BSWAP32_IF_BE(_uncompressedSize);
memcpy(&date, header + 15, 4);
date = OF_BSWAP32_IF_BE(date);
_level = header[20];
_extensions = [[OFMutableArray alloc] init];
switch (_level) {
case 0:
case 1:;
void *pool = objc_autoreleasePoolPush();
uint8_t fileNameLength;
OFString *tmp;
_date = [parseMSDOSDate(date) retain];
fileNameLength = [stream readInt8];
tmp = [stream readStringWithLength: fileNameLength
encoding: encoding];
tmp = [tmp stringByReplacingOccurrencesOfString: @"\\"
withString: @"/"];
_fileName = [tmp copy];
_CRC16 = [stream readLittleEndianInt16];
if (_level == 1) {
_operatingSystemIdentifier = [stream readInt8];
readExtensions(self, stream, encoding, false);
}
objc_autoreleasePoolPop(pool);
break;
case 2:
_date = [[OFDate alloc]
initWithTimeIntervalSince1970: date];
_CRC16 = [stream readLittleEndianInt16];
_operatingSystemIdentifier = [stream readInt8];
readExtensions(self, stream, encoding, true);
break;
default:;
OFString *version = [OFString
stringWithFormat: @"%u", _level];
@throw [OFUnsupportedVersionException
exceptionWithVersion: version];
}
[_extensions makeImmutable];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[_method release];
[_fileName release];
[_directoryName release];
[_date release];
[_fileComment release];
[_mode release];
[_UID release];
[_GID release];
[_owner release];
[_group release];
[_extensions release];
[super dealloc];
}
- (id)copy
{
return [self retain];
}
- (OFString *)fileName
{
if (_directoryName == nil)
return _fileName;
return [_directoryName stringByAppendingString: _fileName];
}
- (OFString *)description
{
void *pool = objc_autoreleasePoolPush();
OFString *mode = (_mode == nil
? @"(nil)"
: [OFString stringWithFormat: @"%" PRIo16, [_mode uInt16Value]]);
OFString *extensions = [[_extensions description]
stringByReplacingOccurrencesOfString: @"\n"
withString: @"\n\t"];
OFString *ret = [OFString stringWithFormat:
@"<%@:\n"
@"\tFile name = %@\n"
@"\tMethod = %@\n"
@"\tCompressed size = %" @PRIu32 "\n"
@"\tUncompressed size = %" @PRIu32 "\n"
@"\tDate = %@\n"
@"\tLevel = %u\n"
@"\tCRC16 = %04" @PRIX16 @"\n"
@"\tOperating system identifier = %c\n"
@"\tComment = %@\n"
@"\tMode = %@\n"
@"\tUID = %@\n"
@"\tGID = %@\n"
@"\tOwner = %@\n"
@"\tGroup = %@\n"
@"\tModification date = %@\n"
@"\tExtensions: %@"
@">",
[self class], [self fileName], _method, _compressedSize,
_uncompressedSize, _date, _level, _CRC16,
_operatingSystemIdentifier, _fileComment, mode, _UID, _GID, _owner,
_group, _modificationDate, extensions];
[ret retain];
objc_autoreleasePoolPop(pool);
return [ret autorelease];
}
@end