release/src-rt-6.x/linux/linux-2.6/scripts/squashfs/lzma/C/7zip/Compress/LZMA_C/LzmaStateDecode.h

   1 /*
   2   LzmaStateDecode.h
   3   LZMA Decoder interface (State version)
   4
   5   LZMA SDK 4.21 Copyright (c) 1999-2005 Igor Pavlov (2005-06-08)
   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 /* #define _LZMA_PROB32 */
  26 /* It can increase speed on some 32-bit CPUs,
  27    but memory usage will be doubled in that case */
  28
  29 /* #define _LZMA_SYSTEM_SIZE_T */
  30 /* Use system's size_t. You can use it to enable 64-bit sizes supporting*/
  31
  32
  33 #ifndef UInt32
  34 #ifdef _LZMA_UINT32_IS_ULONG
  35 #define UInt32 unsigned long
  36 #else
  37 #define UInt32 unsigned int
  38 #endif
  39 #endif
  40
  41 #ifndef SizeT
  42 #ifdef _LZMA_SYSTEM_SIZE_T
  43 #include <stddef.h>
  44 #define SizeT size_t
  45 #else
  46 #define SizeT UInt32
  47 #endif
  48 #endif
  49
  50 #ifdef _LZMA_PROB32
  51 #define CProb UInt32
  52 #else
  53 #define CProb unsigned short
  54 #endif
  55
  56 #define LZMA_RESULT_OK 0
  57 #define LZMA_RESULT_DATA_ERROR 1
  58
  59 #define LZMA_BASE_SIZE 1846
  60 #define LZMA_LIT_SIZE 768
  61
  62 #define LZMA_PROPERTIES_SIZE 5
  63
  64 typedef struct _CLzmaProperties
  65 {
  66   int lc;
  67   int lp;
  68   int pb;
  69   UInt32 DictionarySize;
  70 }CLzmaProperties;
  71
  72 int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);
  73
  74 #define LzmaGetNumProbs(lzmaProps) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((lzmaProps)->lc + (lzmaProps)->lp)))
  75
  76 #define kLzmaInBufferSize 64   /* don't change it. it must be larger than kRequiredInBufferSize */
  77
  78 #define kLzmaNeedInitId (-2)
  79
  80 typedef struct _CLzmaDecoderState
  81 {
  82   CLzmaProperties Properties;
  83   CProb *Probs;
  84   unsigned char *Dictionary;
  85
  86   unsigned char Buffer[kLzmaInBufferSize];
  87   int BufferSize;
  88
  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;  /* -2: decoder needs internal initialization
  97                      -1: stream was finished,
  98                       0: ok
  99                     > 0: need to write RemainLen bytes as match Reps[0],
 100                   */
 101   unsigned char TempDictionary[4];  /* it's required when DictionarySize = 0 */
 102 } CLzmaDecoderState;
 103
 104 #define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; (vs)->BufferSize = 0; }
 105
 106 /* LzmaDecode: decoding from input stream to output stream.
 107   If finishDecoding != 0, then there are no more bytes in input stream
 108   after inStream[inSize - 1]. */
 109
 110 int LzmaDecode(CLzmaDecoderState *vs,
 111     const unsigned char *inStream, SizeT inSize,  SizeT *inSizeProcessed,
 112     unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed,
 113     int finishDecoding);
 114
 115 #endif