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80 lines
1.9 KiB
Objective-C
80 lines
1.9 KiB
Objective-C
/*
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* XADStuffItArsenicHandle.h
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*
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* Copyright (c) 2017-present, MacPaw Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#import "CSByteStreamHandle.h"
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#import "BWT.h"
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typedef struct ArithmeticSymbol
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{
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int symbol;
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int frequency;
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} ArithmeticSymbol;
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typedef struct ArithmeticModel
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{
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int totalfrequency;
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int increment;
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int frequencylimit;
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int numsymbols;
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ArithmeticSymbol symbols[128];
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} ArithmeticModel;
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typedef struct ArithmeticDecoder
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{
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CSInputBuffer *input;
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int range,code;
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} ArithmeticDecoder;
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@interface XADStuffItArsenicHandle:CSByteStreamHandle
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{
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ArithmeticModel initialmodel,selectormodel,mtfmodel[7];
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ArithmeticDecoder decoder;
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MTFState mtf;
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int blockbits,blocksize;
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uint8_t *block;
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BOOL endofblocks;
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int numbytes,bytecount,transformindex;
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uint32_t *transform;
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int randomized,randcount,randindex;
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int repeat,count,last;
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uint32_t crc,compcrc;
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}
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-(id)initWithHandle:(CSHandle *)handle length:(off_t)length;
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-(void)dealloc;
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//-(void)resetBlockStream;
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//-(int)produceBlockAtOffset:(off_t)pos;
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-(void)resetByteStream;
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-(void)readBlock;
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-(uint8_t)produceByteAtOffset:(off_t)pos;
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-(BOOL)hasChecksum;
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-(BOOL)isChecksumCorrect;
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@end
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