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#import "XADCompressParser.h"
#import "XADCompressHandle.h"
@implementation XADCompressParser
+(int)requiredHeaderSize { return 3; }
+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name
{
int length=[data length];
const uint8_t *bytes=[data bytes];
return length>=3&&bytes[0]==0x1f&&bytes[1]==0x9d;
}
-(void)parse
{
CSHandle *fh=[self handle];
[fh skipBytes:2];
int flags=[fh readUInt8];
NSString *name=[[self name] stringByDeletingPathExtension];
NSMutableDictionary *dict=[NSMutableDictionary dictionaryWithObjectsAndKeys:
[self XADPathWithUnseparatedString:name],XADFileNameKey,
[self XADStringWithString:@"Compress"],XADCompressionNameKey,
[NSNumber numberWithLongLong:3],XADDataOffsetKey,
[NSNumber numberWithInt:flags],@"CompressFlags",
nil];
if([name matchedByPattern:@"\\.(tar|cpio)" options:REG_ICASE])
[dict setObject:[NSNumber numberWithBool:YES] forKey:XADIsArchiveKey];
off_t size=[[self handle] fileSize];
if(size!=CSHandleMaxLength)
[dict setObject:[NSNumber numberWithLongLong:size-3] forKey:XADCompressedSizeKey];
[self addEntryWithDictionary:dict];
}
-(CSHandle *)handleForEntryWithDictionary:(NSDictionary *)dict wantChecksum:(BOOL)checksum
{
return [[[XADCompressHandle alloc] initWithHandle:[self handleAtDataOffsetForDictionary:dict]
flags:[[dict objectForKey:@"CompressFlags"] intValue]] autorelease];
}
-(NSString *)formatName { return @"Compress"; }
@end
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