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#import "XADSqueezeParser.h"
#import "XADSqueezeHandle.h"
#import "XADRLE90Handle.h"
#import "XADChecksumHandle.h"
#import "NSDateXAD.h"
@implementation XADSqueezeParser
+(NSMutableDictionary *)parseWithHandle:(CSHandle *)fh endOffset:(off_t)end parser:(XADArchiveParser *)parser
{
int magic1=[fh readUInt8];
if(magic1!=0x76) return nil;
int magic2=[fh readUInt8];
if(magic2!=0xff) return nil;
int sum=[fh readUInt16LE];
NSMutableData *data=[NSMutableData data];
uint8_t byte;
while((byte=[fh readUInt8])) [data appendBytes:&byte length:1];
off_t dataoffset=[fh offsetInFile];
NSMutableDictionary *dict=[NSMutableDictionary dictionaryWithObjectsAndKeys:
[parser XADPathWithData:data separators:XADNoPathSeparator],XADFileNameKey,
[parser XADStringWithString:@"Squeeze"],XADCompressionNameKey,
[NSNumber numberWithUnsignedLongLong:dataoffset],XADDataOffsetKey,
[NSNumber numberWithInt:sum],@"SqueezeChecksum",
nil];
[fh seekToFileOffset:end-8];
int marker=[fh readUInt16LE];
if(marker==0xff77)
{
// TODO: Test this.
int date=[fh readUInt16LE];
int time=[fh readUInt16LE];
[dict setObject:[NSDate XADDateWithMSDOSDate:date time:time] forKey:XADLastModificationDateKey];
NSNumber *compsize=[NSNumber numberWithLongLong:end-dataoffset-8];
[dict setObject:compsize forKey:XADCompressedSizeKey];
[dict setObject:compsize forKey:XADDataLengthKey];
}
else
{
NSNumber *compsize=[NSNumber numberWithLongLong:end-dataoffset];
[dict setObject:compsize forKey:XADCompressedSizeKey];
[dict setObject:compsize forKey:XADDataLengthKey];
}
return dict;
}
+(CSHandle *)handleForEntryWithDictionary:(NSDictionary *)dict wantChecksum:(BOOL)checksum handle:(CSHandle *)handle
{
int sum=[[dict objectForKey:@"SqueezeChecksum"] intValue];
handle=[[[XADSqueezeHandle alloc] initWithHandle:handle] autorelease];
handle=[[[XADRLE90Handle alloc] initWithHandle:handle] autorelease];
if(checksum) handle=[[[XADChecksumHandle alloc] initWithHandle:handle
length:CSHandleMaxLength correctChecksum:sum mask:0xffff] autorelease];
return handle;
}
+(int)requiredHeaderSize { return 1024; }
+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name
{
const uint8_t *bytes=[data bytes];
int length=[data length];
if(length<5) return NO;
if(bytes[0]!=0x76||bytes[1]!=0xff) return NO;
if(bytes[4]==0) return NO;
for(int i=4;i<length;i++)
{
if(bytes[i]==0)
{
return YES;
}
if(bytes[i]<32) return NO;
}
return NO;
}
-(void)parse
{
CSHandle *fh=[self handle];
NSMutableDictionary *dict=[XADSqueezeParser parseWithHandle:fh
endOffset:[fh fileSize] parser:self];
XADPath *filename=[dict objectForKey:XADFileNameKey];
NSData *namedata=[filename data];
const char *bytes=[namedata bytes];
int length=[namedata length];
if(length>4)
if(bytes[length-4]=='.')
if(tolower(bytes[length-3])=='l')
if(tolower(bytes[length-2])=='b')
if(tolower(bytes[length-1])=='r')
{
[dict setObject:[NSNumber numberWithBool:YES] forKey:XADIsArchiveKey];
}
[self addEntryWithDictionary:dict];
}
-(CSHandle *)handleForEntryWithDictionary:(NSDictionary *)dict wantChecksum:(BOOL)checksum
{
CSHandle *handle=[self handleAtDataOffsetForDictionary:dict];
return [XADSqueezeParser handleForEntryWithDictionary:dict wantChecksum:checksum handle:handle];
}
-(NSString *)formatName { return @"Squeeze"; }
@end
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