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#import "XADBzip2Parser.h"
#import "CSBzip2Handle.h"
@implementation XADBzip2Parser
+(int)requiredHeaderSize { return 10; }
+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name;
{
const uint8_t *bytes=[data bytes];
int length=[data length];
if(length<10) return NO;
if(bytes[0]=='B'&&bytes[1]=='Z'&&bytes[2]=='h'&&bytes[3]>='1'&&bytes[3]<='9')
{
if(bytes[4]==0x31&&bytes[5]==0x41&&bytes[6]==0x59
&&bytes[7]==0x26&&bytes[8]==0x53&&bytes[9]==0x59) return YES;
if(bytes[4]==0x17&&bytes[5]==0x72&&bytes[6]==0x45
&&bytes[7]==0x38&&bytes[8]==0x50&&bytes[9]==0x90) return YES;
}
return NO;
}
-(void)parse
{
NSString *name=[self name];
NSString *extension=[[name pathExtension] lowercaseString];
NSString *contentname;
if([extension isEqual:@"tbz"]||[extension isEqual:@"tbz2"]) contentname=[[name stringByDeletingPathExtension] stringByAppendingPathExtension:@"tar"];
else contentname=[name stringByDeletingPathExtension];
// TODO: set no filename flag
NSMutableDictionary *dict=[NSMutableDictionary dictionaryWithObjectsAndKeys:
[self XADPathWithUnseparatedString:contentname],XADFileNameKey,
[self XADStringWithString:@"Bzip2"],XADCompressionNameKey,
nil];
if([contentname matchedByPattern:@"\\.(tar|cpio)$" options:REG_ICASE])
[dict setObject:[NSNumber numberWithBool:YES] forKey:XADIsArchiveKey];
off_t filesize=[[self handle] fileSize];
if(filesize!=CSHandleMaxLength)
[dict setObject:[NSNumber numberWithUnsignedLongLong:filesize] forKey:XADCompressedSizeKey];
[self addEntryWithDictionary:dict];
}
-(CSHandle *)handleForEntryWithDictionary:(NSDictionary *)dictionary wantChecksum:(BOOL)checksum
{
CSHandle *handle=[self handle];
[handle seekToFileOffset:0];
return [CSBzip2Handle bzip2HandleWithHandle:handle];
}
-(NSString *)formatName { return @"Bzip2"; }
@end
/*
#define BZIP2SFX_SEARCHSIZE (5000)
TODO: SFX
XADRECOGDATA(bzip2SFX) {
if(data[0] == '#' && data[1] == '!') {
int i;
if (size < 17) return 0;
if (size > BZIP2SFX_SEARCHSIZE) size = BZIP2SFX_SEARCHSIZE;
size -= 10;
for (i = 2; i < (int) size; i++) {
const xadUINT8 *p = &data[i];
if ((p[0] == 'B') && (p[1] == 'Z') && (p[2] == 'h') &&
((p[3] >= '1') && (p[3] <= '9')) &&
(((p[4] == 0x31) && (p[5] == 0x41) && (p[6] == 0x59) &&
(p[7] == 0x26) && (p[8] == 0x53) && (p[9] == 0x59)) ||
((p[4] == 0x17) && (p[5] == 0x72) && (p[6] == 0x45) &&
(p[7] == 0x38) && (p[8] == 0x50) && (p[9] == 0x90))
)
)
{
return 1;
}
}
}
return 0;
}*/
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