XADMaster/XAD7ZipBranchHandles.m
2018-03-21 14:24:50 +02:00

130 lines
3.6 KiB
Objective-C

/*
* XAD7ZipBranchHandles.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 "XAD7ZipBranchHandles.h"
#if !__LP64__
#define _LZMA_UINT32_IS_ULONG
#endif
#define Byte LzmaByte
#define UInt16 LzmaUInt16
#define UInt32 LzmaUInt32
#define UInt64 LzmaUInt64
#import "lzma/Bra.h"
@implementation XAD7ZipBranchHandle
-(id)initWithHandle:(CSHandle *)handle
{
return [self initWithHandle:handle length:CSHandleMaxLength propertyData:nil];
}
-(id)initWithHandle:(CSHandle *)handle propertyData:(NSData *)propertydata
{
return [self initWithHandle:handle length:CSHandleMaxLength propertyData:propertydata];
}
-(id)initWithHandle:(CSHandle *)handle length:(off_t)length
{
return [self initWithHandle:handle length:length propertyData:nil];
}
-(id)initWithHandle:(CSHandle *)handle length:(off_t)length propertyData:(NSData *)propertydata
{
if((self=[super initWithParentHandle:handle length:length]))
{
startoffs=[handle offsetInFile];
if(propertydata&&[propertydata length]>=4) baseoffset=CSUInt32LE([propertydata bytes]);
else baseoffset=0;
[self setBlockPointer:inbuffer];
}
return self;
}
-(void)resetBlockStream
{
[parent seekToFileOffset:startoffs];
leftoverstart=leftoverlength=0;
}
-(int)produceBlockAtOffset:(off_t)pos
{
memmove(inbuffer,inbuffer+leftoverstart,leftoverlength);
int bytesread=[parent readAtMost:sizeof(inbuffer)-leftoverlength toBuffer:inbuffer+leftoverlength];
if(bytesread==0)
{
[self endBlockStream];
if(leftoverlength) return leftoverlength;
else return 0;
}
int processed=[self decodeBlock:inbuffer length:bytesread+leftoverlength offset:pos+baseoffset];
leftoverstart=processed;
leftoverlength=bytesread+leftoverlength-processed;
return processed;
}
-(int)decodeBlock:(uint8_t *)block length:(int)length offset:(off_t)pos { return 0; }
@end
@implementation XAD7ZipBCJHandle
-(void)resetBlockStream
{
[super resetBlockStream];
x86_Convert_Init(state);
}
-(int)decodeBlock:(uint8_t *)block length:(int)length offset:(off_t)pos
{ return x86_Convert(block,length,(UInt32)pos,(UInt32 *)&state,0); }
@end
@implementation XAD7ZipPPCHandle
-(int)decodeBlock:(uint8_t *)block length:(int)length offset:(off_t)pos
{ return PPC_Convert(block,length,(UInt32)pos,0); }
@end
@implementation XAD7ZipIA64Handle
-(int)decodeBlock:(uint8_t *)block length:(int)length offset:(off_t)pos
{ return IA64_Convert(block,length,(UInt32)pos,0); }
@end
@implementation XAD7ZipARMHandle
-(int)decodeBlock:(uint8_t *)block length:(int)length offset:(off_t)pos
{ return ARM_Convert(block,length,(UInt32)pos,0); }
@end
@implementation XAD7ZipThumbHandle
-(int)decodeBlock:(uint8_t *)block length:(int)length offset:(off_t)pos
{ return ARMT_Convert(block,length,(UInt32)pos,0); }
@end
@implementation XAD7ZipSPARCHandle
-(int)decodeBlock:(uint8_t *)block length:(int)length offset:(off_t)pos
{ return SPARC_Convert(block,length,(UInt32)pos,0); }
@end