1 /* 

     2   LzmaStateDecode.h

     3   LZMA Decoder interface (State version)

     4 

     5   LZMA SDK 4.40 Copyright (c) 1999-2006 Igor Pavlov (2006-05-01)

     6   http://www.7-zip.org/

     7 

     8   LZMA SDK is licensed under two licenses:

     9   1) GNU Lesser General Public License (GNU LGPL)

    10   2) Common Public License (CPL)

    11   It means that you can select one of these two licenses and 

    12   follow rules of that license.

    13 

    14   SPECIAL EXCEPTION:

    15   Igor Pavlov, as the author of this code, expressly permits you to 

    16   statically or dynamically link your code (or bind by name) to the 

    17   interfaces of this file without subjecting your linked code to the 

    18   terms of the CPL or GNU LGPL. Any modifications or additions 

    19   to this file, however, are subject to the LGPL or CPL terms.

    20 */

    21 

    22 #ifndef __LZMASTATEDECODE_H

    23 #define __LZMASTATEDECODE_H

    24 

    25 #include "LzmaTypes.h"

    26 

    27 /* #define _LZMA_PROB32 */

    28 /* It can increase speed on some 32-bit CPUs, 

    29    but memory usage will be doubled in that case */

    30 

    31 #ifdef _LZMA_PROB32

    32 #define CProb UInt32

    33 #else

    34 #define CProb UInt16

    35 #endif

    36 

    37 #define LZMA_RESULT_OK 0

    38 #define LZMA_RESULT_DATA_ERROR 1

    39 

    40 #define LZMA_BASE_SIZE 1846

    41 #define LZMA_LIT_SIZE 768

    42 

    43 #define LZMA_PROPERTIES_SIZE 5

    44 

    45 typedef struct _CLzmaProperties

    46 {

    47   int lc;

    48   int lp;

    49   int pb;

    50   UInt32 DictionarySize;

    51 }CLzmaProperties;

    52 

    53 int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);

    54 

    55 #define LzmaGetNumProbs(lzmaProps) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((lzmaProps)->lc + (lzmaProps)->lp)))

    56 

    57 #define kLzmaInBufferSize 64   /* don't change it. it must be larger than kRequiredInBufferSize */

    58 

    59 #define kLzmaNeedInitId (-2)

    60 

    61 typedef struct _CLzmaDecoderState

    62 {

    63   CLzmaProperties Properties;

    64   CProb *Probs;

    65   unsigned char *Dictionary;

    66 

    67   unsigned char Buffer[kLzmaInBufferSize];

    68   int BufferSize;

    69 

    70   UInt32 Range;

    71   UInt32 Code;

    72   UInt32 DictionaryPos;

    73   UInt32 GlobalPos;

    74   UInt32 DistanceLimit;

    75   UInt32 Reps[4];

    76   int State;

    77   int RemainLen;  /* -2: decoder needs internal initialization

    78                      -1: stream was finished, 

    79                       0: ok

    80                     > 0: need to write RemainLen bytes as match Reps[0],

    81                   */

    82   unsigned char TempDictionary[4];  /* it's required when DictionarySize = 0 */

    83 } CLzmaDecoderState;

    84 

    85 #define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; (vs)->BufferSize = 0; }

    86 

    87 /* LzmaDecode: decoding from input stream to output stream.

    88   If finishDecoding != 0, then there are no more bytes in input stream

    89   after inStream[inSize - 1]. */

    90 

    91 int LzmaDecode(CLzmaDecoderState *vs,

    92     const unsigned char *inStream, SizeT inSize,  SizeT *inSizeProcessed,

    93     unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed,

    94     int finishDecoding);

    95 

    96 #endif