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#import "XADCpioParser.h"
#import "XADChecksumHandle.h"
#import "NumberParsing.h"
@implementation XADCpioParser
+(int)requiredHeaderSize { return 6; }
+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name
{
const uint8_t *bytes=[data bytes];
int length=[data length];
if(length<6) return NO;
if(bytes[0]=='0'&&bytes[1]=='7'&&bytes[2]=='0'&&bytes[3]=='7'&&bytes[4]=='0'&&bytes[5]=='7') return YES;
if(bytes[0]=='0'&&bytes[1]=='7'&&bytes[2]=='0'&&bytes[3]=='7'&&bytes[4]=='0'&&bytes[5]=='1') return YES;
if(bytes[0]=='0'&&bytes[1]=='7'&&bytes[2]=='0'&&bytes[3]=='7'&&bytes[4]=='0'&&bytes[5]=='2') return YES;
if(bytes[0]==0x71&&bytes[1]==0xc7) return YES;
if(bytes[0]==0xc7&&bytes[1]==0x71) return YES;
return NO;
}
-(void)parseWithSeparateMacForks
{
CSHandle *fh=[self handle];
while([self shouldKeepParsing])
{
uint8_t magic[2];
[fh readBytes:2 toBuffer:magic];
int devmajor,devminor,ino,mode,uid,gid,nlink,rdevmajor,rdevminor,namesize,checksum;
uint64_t mtime,filesize;
NSData *namedata;
int pad=0;
BOOL haschecksum=NO;
if(magic[0]=='0'&&magic[1]=='7') // ASCII
{
uint8_t more[4];
[fh readBytes:4 toBuffer:more];
if(more[0]=='0'&&more[1]=='7'&&more[2]=='0'&&more[3]=='7')
{
devmajor=(int)[fh readOctalNumberWithDigits:3];
devminor=(int)[fh readOctalNumberWithDigits:3];
ino=(int)[fh readOctalNumberWithDigits:6];
mode=(int)[fh readOctalNumberWithDigits:6];
uid=(int)[fh readOctalNumberWithDigits:6];
gid=(int)[fh readOctalNumberWithDigits:6];
nlink=(int)[fh readOctalNumberWithDigits:6];
rdevmajor=(int)[fh readOctalNumberWithDigits:3];
rdevminor=(int)[fh readOctalNumberWithDigits:3];
mtime=[fh readOctalNumberWithDigits:11];
namesize=(int)[fh readOctalNumberWithDigits:6];
filesize=[fh readOctalNumberWithDigits:11];
namedata=[fh readDataOfLength:namesize-1];
[fh skipBytes:1];
}
else if(more[0]=='0'&&more[1]=='7'&&more[2]=='0'&&(more[3]=='1'||more[3]=='2'))
{
ino=(int)[fh readHexadecimalNumberWithDigits:8];
mode=(int)[fh readHexadecimalNumberWithDigits:8];
uid=(int)[fh readHexadecimalNumberWithDigits:8];
gid=(int)[fh readHexadecimalNumberWithDigits:8];
nlink=(int)[fh readHexadecimalNumberWithDigits:8];
mtime=[fh readHexadecimalNumberWithDigits:8];
filesize=[fh readHexadecimalNumberWithDigits:8];
devmajor=(int)[fh readHexadecimalNumberWithDigits:8];
devminor=(int)[fh readHexadecimalNumberWithDigits:8];
rdevmajor=(int)[fh readHexadecimalNumberWithDigits:8];
rdevminor=(int)[fh readHexadecimalNumberWithDigits:8];
namesize=(int)[fh readHexadecimalNumberWithDigits:8];
checksum=(int)[fh readHexadecimalNumberWithDigits:8];
namedata=[fh readDataOfLength:namesize-1];
[fh skipBytes:1+((-namesize-2&3))];
pad=(-filesize)&3;
if(more[3]=='2') haschecksum=YES;
}
else { [XADException raiseIllegalDataException]; for(;;); }
}
else if(magic[0]==0x71&&magic[1]==0xc7) // big-endian binary
{
int dev=[fh readUInt16BE];
ino=[fh readUInt16BE];
mode=[fh readUInt16BE];
uid=[fh readUInt16BE];
gid=[fh readUInt16BE];
nlink=[fh readUInt16BE];
int rdev=[fh readUInt16BE];
mtime=[fh readUInt32BE];
namesize=[fh readUInt16BE];
filesize=[fh readUInt32BE];
namedata=[fh readDataOfLength:namesize-1];
[fh skipBytes:1+(namesize&1)];
devmajor=dev>>9;
devminor=dev&0x1ff;
rdevmajor=rdev>>9;
rdevminor=rdev&0x1ff;
pad=filesize&1;
}
else if(magic[0]==0xc7&&magic[1]==0x71) // little-endian binary
{
int dev=[fh readUInt16LE];
ino=[fh readUInt16LE];
mode=[fh readUInt16LE];
uid=[fh readUInt16LE];
gid=[fh readUInt16LE];
nlink=[fh readUInt16LE];
int rdev=[fh readUInt16LE];
int mtimehigh=[fh readUInt16LE];
int mtimelow=[fh readUInt16LE];
namesize=[fh readUInt16LE];
int filesizehigh=[fh readUInt16LE];
int filesizelow=[fh readUInt16LE];
namedata=[fh readDataOfLength:namesize-1];
[fh skipBytes:1+(namesize&1)];
mtime=(mtimehigh<<16)+mtimelow;
filesize=(filesizehigh<<16)+filesizelow;
devmajor=dev>>9;
devminor=dev&0x1ff;
rdevmajor=rdev>>9;
rdevminor=rdev&0x1ff;
pad=filesize&1;
}
else { [XADException raiseIllegalDataException]; for(;;); }
if([namedata length]==10&&memcmp([namedata bytes],"TRAILER!!!",10)==0) break;
off_t pos=[fh offsetInFile];
NSMutableDictionary *dict=[NSMutableDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:devmajor],@"CpioDevMajor",
[NSNumber numberWithInt:devminor],@"CpioDevMinor",
[NSNumber numberWithInt:ino],@"CpioIno",
[NSNumber numberWithInt:mode],XADPosixPermissionsKey,
[NSNumber numberWithInt:uid],XADPosixUserKey,
[NSNumber numberWithInt:gid],XADPosixGroupKey,
[NSNumber numberWithInt:nlink],@"CpioNlink",
[self XADPathWithData:namedata separators:XADUnixPathSeparator],XADFileNameKey,
[NSDate dateWithTimeIntervalSince1970:mtime],XADLastModificationDateKey,
[NSNumber numberWithLongLong:filesize],XADFileSizeKey,
[NSNumber numberWithLongLong:filesize+pad],XADCompressedSizeKey,
[NSNumber numberWithLongLong:filesize],XADDataLengthKey,
[NSNumber numberWithLongLong:pos],XADDataOffsetKey,
nil];
int type=mode&0xf000;
if(type==0x4000)
{
[dict setObject:[NSNumber numberWithBool:YES] forKey:XADIsDirectoryKey];
}
if(type==0x2000||type==0x6000)
{
[dict setObject:[NSNumber numberWithInt:rdevmajor] forKey:XADDeviceMajorKey];
[dict setObject:[NSNumber numberWithInt:rdevminor] forKey:XADDeviceMinorKey];
}
if(haschecksum)
if(type==0x8000)
{
[dict setObject:[NSNumber numberWithInt:checksum] forKey:@"CpioChecksum"];
}
[self addEntryWithDictionary:dict];
[fh seekToFileOffset:pos+filesize+pad];
}
}
-(CSHandle *)rawHandleForEntryWithDictionary:(NSDictionary *)dict wantChecksum:(BOOL)checksum
{
CSHandle *handle=[self handleAtDataOffsetForDictionary:dict];
if(checksum)
{
NSNumber *check=[dict objectForKey:@"CpioChecksum"];
if(check) handle=[[[XADChecksumHandle alloc] initWithHandle:handle
length:[[dict objectForKey:XADDataLengthKey] longLongValue]
correctChecksum:[check intValue] mask:0xffffffff] autorelease];
}
return handle;
}
-(NSString *)formatName { return @"Cpio"; }
@end
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