target/linux/ath79/image/lzma-loader/src/LzmaDecode.h

   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