openwrt/target/linux/image/generic/lzma-loader/src/LzmaDecode.h

   1 /*
   2   LzmaDecode.h
   3   LZMA Decoder interface
   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 __LZMADECODE_H
  23 #define __LZMADECODE_H
  24
  25 /* #define _LZMA_IN_CB */
  26 /* Use callback for input data */
  27
  28 /* #define _LZMA_OUT_READ */
  29 /* Use read function for output data */
  30
  31 /* #define _LZMA_PROB32 */
  32 /* It can increase speed on some 32-bit CPUs,
  33    but memory usage will be doubled in that case */
  34
  35 /* #define _LZMA_LOC_OPT */
  36 /* Enable local speed optimizations inside code */
  37
  38 /* #define _LZMA_SYSTEM_SIZE_T */
  39 /* Use system's size_t. You can use it to enable 64-bit sizes supporting*/
  40
  41 #ifndef UInt32
  42 #ifdef _LZMA_UINT32_IS_ULONG
  43 #define UInt32 unsigned long
  44 #else
  45 #define UInt32 unsigned int
  46 #endif
  47 #endif
  48
  49 #ifndef SizeT
  50 #ifdef _LZMA_SYSTEM_SIZE_T
  51 #include <stddef.h>
  52 #define SizeT size_t
  53 #else
  54 #define SizeT UInt32
  55 #endif
  56 #endif
  57
  58 #ifdef _LZMA_PROB32
  59 #define CProb UInt32
  60 #else
  61 #define CProb unsigned short
  62 #endif
  63
  64 #define LZMA_RESULT_OK 0
  65 #define LZMA_RESULT_DATA_ERROR 1
  66
  67 #ifdef _LZMA_IN_CB
  68 typedef struct _ILzmaInCallback
  69 {
  70   int (*Read)(void *object, const unsigned char **buffer, SizeT *bufferSize);
  71 } ILzmaInCallback;
  72 #endif
  73
  74 #define LZMA_BASE_SIZE 1846
  75 #define LZMA_LIT_SIZE 768
  76
  77 #define LZMA_PROPERTIES_SIZE 5
  78
  79 typedef struct _CLzmaProperties
  80 {
  81   int lc;
  82   int lp;
  83   int pb;
  84   #ifdef _LZMA_OUT_READ
  85   UInt32 DictionarySize;
  86   #endif
  87 }CLzmaProperties;
  88
  89 int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);
  90
  91 #define LzmaGetNumProbs(Properties) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((Properties)->lc + (Properties)->lp)))
  92
  93 #define kLzmaNeedInitId (-2)
  94
  95 typedef struct _CLzmaDecoderState
  96 {
  97   CLzmaProperties Properties;
  98   CProb *Probs;
  99
 100   #ifdef _LZMA_IN_CB
 101   const unsigned char *Buffer;
 102   const unsigned char *BufferLim;
 103   #endif
 104
 105   #ifdef _LZMA_OUT_READ
 106   unsigned char *Dictionary;
 107   UInt32 Range;
 108   UInt32 Code;
 109   UInt32 DictionaryPos;
 110   UInt32 GlobalPos;
 111   UInt32 DistanceLimit;
 112   UInt32 Reps[4];
 113   int State;
 114   int RemainLen;
 115   unsigned char TempDictionary[4];
 116   #endif
 117 } CLzmaDecoderState;
 118
 119 #ifdef _LZMA_OUT_READ
 120 #define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; }
 121 #endif
 122
 123 int LzmaDecode(CLzmaDecoderState *vs,
 124     #ifdef _LZMA_IN_CB
 125     ILzmaInCallback *inCallback,
 126     #else
 127     const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
 128     #endif
 129     unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed);
 130
 131 #endif