mirror of
https://github.com/MacPaw/XADMaster.git
synced 2025-08-28 19:13:49 +02:00
141 lines
3.6 KiB
Objective-C
141 lines
3.6 KiB
Objective-C
/*
|
|
* XADLZHSFXParsers.m
|
|
*
|
|
* Copyright (c) 2017-present, MacPaw Inc. All rights reserved.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301 USA
|
|
*/
|
|
#import "XADLZHSFXParsers.h"
|
|
#import "XADXORHandle.h"
|
|
#import "Scanning.h"
|
|
|
|
@implementation XADLZHAmigaSFXParser
|
|
|
|
+(int)requiredHeaderSize { return 48; }
|
|
|
|
+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name;
|
|
{
|
|
const uint8_t *bytes=[data bytes];
|
|
int length=[data length];
|
|
|
|
if(length<48) return NO;
|
|
|
|
return CSUInt32BE(&bytes[11*4])==0x53465821;
|
|
}
|
|
|
|
-(void)parse
|
|
{
|
|
lha150r=NO;
|
|
|
|
CSHandle *fh=[self handle];
|
|
|
|
[fh seekToFileOffset:0x34];
|
|
|
|
uint32_t offs=[fh readUInt32BE];
|
|
if(offs==0x1914) lha150r=YES;
|
|
[fh seekToFileOffset:offs];
|
|
|
|
[super parse];
|
|
}
|
|
|
|
-(CSHandle *)handleAtDataOffsetForDictionary:(NSDictionary *)dict
|
|
{
|
|
CSHandle *handle=[super handleAtDataOffsetForDictionary:dict];
|
|
|
|
if(lha150r) // Handle obscured archives
|
|
{
|
|
return [[[XADXORHandle alloc] initWithHandle:handle
|
|
password:[NSData dataWithBytes:"BOA\017" length:4]] autorelease];
|
|
}
|
|
else return handle;
|
|
}
|
|
|
|
-(NSString *)formatName { return @"Self-extracting Amiga LhA"; }
|
|
|
|
@end
|
|
|
|
|
|
|
|
@implementation XADLZHCommodore64SFXParser
|
|
|
|
+(int)requiredHeaderSize { return 0xe90; }
|
|
|
|
+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name;
|
|
{
|
|
const uint8_t *bytes=[data bytes];
|
|
int length=[data length];
|
|
|
|
if(length<0xe90) return NO;
|
|
|
|
return bytes[0]==0x01&&bytes[2]==0x28&&bytes[3]==0x1c&&
|
|
bytes[0xd30]=='1'&&bytes[0xd44]=='L'&&bytes[0xd45]=='H'&&bytes[0xd46]=='A'&&
|
|
bytes[0xe8b]=='-'&&bytes[0xe8c]=='l'&&bytes[0xe8d]=='h'&&bytes[0xe8f]=='-';
|
|
}
|
|
|
|
-(void)parse
|
|
{
|
|
CSHandle *fh=[self handle];
|
|
[fh seekToFileOffset:0xe89];
|
|
[super parse];
|
|
}
|
|
|
|
-(NSString *)formatName { return @"Self-extracting Commodore 64 LhA"; }
|
|
|
|
@end
|
|
|
|
|
|
|
|
@implementation XADLZHSFXParser
|
|
|
|
+(int)requiredHeaderSize { return 84; }
|
|
|
|
+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name;
|
|
{
|
|
const uint8_t *bytes=[data bytes];
|
|
int length=[data length];
|
|
|
|
if(length>=44&&bytes[9*4]=='L'&&bytes[9*4+1]=='H'&&bytes[9*4+3]==0x27
|
|
&&CSUInt32BE(bytes+10*4)==0x73205346) return YES;
|
|
|
|
if(length>=40&&CSUInt32BE(bytes+8*4)==0x4c5a5353&&CSUInt32BE(bytes+9*4)==0x2073656c) return YES;
|
|
|
|
if(length>=18&&CSUInt32BE(bytes+6)==0x53465820&&CSUInt32BE(bytes+10)==0x6f66204c
|
|
&&CSUInt32BE(bytes+14)==0x48617263) return YES;
|
|
|
|
if(length>=84&&bytes[9*4+1]=='L'&&bytes[9*4+2]=='H'&&CSUInt32BE(bytes+19*4)==0x6e616d65
|
|
&&CSUInt32BE(bytes+20*4)==0x20746f20) return YES;
|
|
|
|
return NO;
|
|
}
|
|
|
|
static int MatchLZHSignature(const uint8_t *bytes,int available,off_t offset,void *state)
|
|
{
|
|
if(available<5) return NO;
|
|
return bytes[2]=='-'&&bytes[3]=='l'&&(bytes[4]=='h'||bytes[4]=='z')&&bytes[6]=='-';
|
|
}
|
|
|
|
-(void)parse
|
|
{
|
|
if(![[self handle] scanUsingMatchingFunction:MatchLZHSignature maximumLength:7])
|
|
[XADException raiseUnknownException];
|
|
|
|
[super parse];
|
|
}
|
|
|
|
-(NSString *)formatName { return @"Self-extracting LZH"; }
|
|
|
|
@end
|
|
|