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

138 lines
3 KiB
Objective-C

/*
* XADARJFastestHandle.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 "XADARJFastestHandle.h"
@implementation XADARJFastestHandle
-(id)initWithHandle:(CSHandle *)handle length:(off_t)length
{
return [super initWithInputBufferForHandle:handle length:length windowSize:0x8000];
}
-(void)resetLZSSHandle
{
}
-(int)nextLiteralOrOffset:(int *)offset andLength:(int *)length atPosition:(off_t)pos
{
int val=0;
int pow=0;
while(pow<7)
{
if(!CSInputNextBit(input)) break;
val+=1<<pow;
pow++;
}
if(pow) val+=CSInputNextBitString(input,pow);
if(!val) return CSInputNextBitString(input,8);
else
{
int offs=0;
int pow=9;
while(pow<13)
{
if(!CSInputNextBit(input)) break;
offs+=1<<pow;
pow++;
}
offs+=CSInputNextBitString(input,pow);
*offset=offs+1;
*length=val+2;
return XADLZSSMatch;
}
}
@end
/*
#define ARJSTRTP 9
#define ARJSTOPP 13
#define ARJSTRTL 0
#define ARJSTOPL 7
static xadINT32 ARJ_Decrunch(struct xadInOut *io)
{
struct xadMasterBase *xadMasterBase = io->xio_xadMasterBase;
xadINT32 err;
xadUINT32 dicsiz = (1<<15);
xadSTRPTR text;
xadINT16 i, c, width, pwr;
xadUINT32 loc = 0;
if((text = xadAllocVec(XADM dicsiz, XADMEMF_PUBLIC|XADMEMF_CLEAR)))
{
--dicsiz;
while(!(io->xio_Flags & (XADIOF_LASTOUTBYTE|XADIOF_ERROR)))
{
c = 0;
pwr = 1 << (ARJSTRTL);
for(width = (ARJSTRTL); width < (ARJSTOPL); width++)
{
if(!xadIOGetBitsHigh(io, 1))
break;
c += pwr;
pwr <<= 1;
}
if(width)
c += xadIOGetBitsHigh(io, width);
if(!c)
{
text[loc++] = xadIOPutChar(io, xadIOGetBitsHigh(io, 8));
loc &= dicsiz;
}
else
{
c += 3 - 1;
i = 0;
pwr = 1 << (ARJSTRTP);
for(width = (ARJSTRTP); width < (ARJSTOPP); width++)
{
if(!xadIOGetBitsHigh(io, 1))
break;
i += pwr;
pwr <<= 1;
}
if(width)
i += xadIOGetBitsHigh(io, width);
i = loc - i - 1;
while(c--)
{
text[loc++] = xadIOPutChar(io, text[i++ & dicsiz]);
loc &= dicsiz;
}
}
}
err = io->xio_Error;
xadFreeObjectA(XADM text, 0);
}
else
err = XADERR_NOMEMORY;
return err;
}
*/