1 /* 

     2   LzmaDecode.h

     3   LZMA Decoder interface

     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 __LZMADECODE_H

    23 #define __LZMADECODE_H

    24 

    25 #include "LzmaTypes.h"

    26 

    27 /* #define _LZMA_IN_CB */

    28 /* Use callback for input data */

    29 

    30 /* #define _LZMA_OUT_READ */

    31 /* Use read function for output data */

    32 

    33 /* #define _LZMA_PROB32 */

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

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

    36 

    37 /* #define _LZMA_LOC_OPT */

    38 /* Enable local speed optimizations inside code */

    39 

    40 #ifdef _LZMA_PROB32

    41 #define CProb UInt32

    42 #else

    43 #define CProb UInt16

    44 #endif

    45 

    46 #define LZMA_RESULT_OK 0

    47 #define LZMA_RESULT_DATA_ERROR 1

    48 

    49 #ifdef _LZMA_IN_CB

    50 typedef struct _ILzmaInCallback

    51 {

    52   int (*Read)(void *object, const unsigned char **buffer, SizeT *bufferSize);

    53 } ILzmaInCallback;

    54 #endif

    55 

    56 #define LZMA_BASE_SIZE 1846

    57 #define LZMA_LIT_SIZE 768

    58 

    59 #define LZMA_PROPERTIES_SIZE 5

    60 

    61 typedef struct _CLzmaProperties

    62 {

    63   int lc;

    64   int lp;

    65   int pb;

    66   #ifdef _LZMA_OUT_READ

    67   UInt32 DictionarySize;

    68   #endif

    69 }CLzmaProperties;

    70 

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

    72 

    73 #define LzmaGetNumProbs(Properties) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((Properties)->lc + (Properties)->lp)))

    74 

    75 #define kLzmaNeedInitId (-2)

    76 

    77 typedef struct _CLzmaDecoderState

    78 {

    79   CLzmaProperties Properties;

    80   CProb *Probs;

    81 

    82   #ifdef _LZMA_IN_CB

    83   const unsigned char *Buffer;

    84   const unsigned char *BufferLim;

    85   #endif

    86 

    87   #ifdef _LZMA_OUT_READ

    88   unsigned char *Dictionary;

    89   UInt32 Range;

    90   UInt32 Code;

    91   UInt32 DictionaryPos;

    92   UInt32 GlobalPos;

    93   UInt32 DistanceLimit;

    94   UInt32 Reps[4];

    95   int State;

    96   int RemainLen;

    97   unsigned char TempDictionary[4];

    98   #endif

    99 } CLzmaDecoderState;

   100 

   101 #ifdef _LZMA_OUT_READ

   102 #define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; }

   103 #endif

   104 

   105 int LzmaDecode(CLzmaDecoderState *vs,

   106     #ifdef _LZMA_IN_CB

   107     ILzmaInCallback *inCallback,

   108     #else

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

   110     #endif

   111     unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed);

   112 

   113 #endif