package/uboot-ifxmips/files/lib_bootstrap/LzmaWrapper.c

   1 /******************************************************************************
   2 **
   3 ** FILE NAME    : LzmaWrapper.c
   4 ** PROJECT      : bootloader
   5 ** MODULES      : U-boot
   6 **
   7 ** DATE         : 2 Nov 2006
   8 ** AUTHOR       : Lin Mars
   9 ** DESCRIPTION  : LZMA decoder support for U-boot 1.1.5
  10 ** COPYRIGHT    :       Copyright (c) 2006
  11 **                      Infineon Technologies AG
  12 **                      Am Campeon 1-12, 85579 Neubiberg, Germany
  13 **
  14 **    This program is free software; you can redistribute it and/or modify
  15 **    it under the terms of the GNU General Public License as published by
  16 **    the Free Software Foundation; either version 2 of the License, or
  17 **    (at your option) any later version.
  18 **
  19 ** HISTORY
  20 ** $Date        $Author         $Comment
  21 ** 2 Nov 2006   Lin Mars        init version which derived from LzmaTest.c from
  22 **                              LZMA v4.43 SDK
  23 *******************************************************************************/
  24 #define LZMA_NO_STDIO
  25 #ifndef LZMA_NO_STDIO
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #endif
  30
  31 #include <config.h>
  32 #include <common.h>
  33 #include <linux/types.h>
  34 #include <linux/string.h>
  35 #include <linux/ctype.h>
  36 #include <malloc.h>
  37
  38 #ifdef CONFIG_LZMA
  39
  40 #include "LzmaDecode.h"
  41 #include "LzmaWrapper.h"
  42
  43 static const char *kCantReadMessage = "Can not read from source buffer";
  44 static const char *kCantAllocateMessage = "Not enough buffer for decompression";
  45
  46 static size_t rpos=0, dpos=0;
  47
  48 static int MyReadFileAndCheck(unsigned char *src, void *dest, size_t size)
  49 {
  50   if (size == 0)
  51     return 0;
  52   memcpy(dest, src + rpos, size);
  53   rpos += size;
  54   return 1;
  55 }
  56
  57 int lzma_inflate(unsigned char *source, int s_len, unsigned char *dest, int *d_len)
  58 {
  59   /* We use two 32-bit integers to construct 64-bit integer for file size.
  60      You can remove outSizeHigh, if you don't need >= 4GB supporting,
  61      or you can use UInt64 outSize, if your compiler supports 64-bit integers*/
  62   UInt32 outSize = 0;
  63   UInt32 outSizeHigh = 0;
  64   SizeT outSizeFull;
  65   unsigned char *outStream;
  66
  67   int waitEOS = 1;
  68   /* waitEOS = 1, if there is no uncompressed size in headers,
  69    so decoder will wait EOS (End of Stream Marker) in compressed stream */
  70
  71   SizeT compressedSize;
  72   unsigned char *inStream;
  73
  74   CLzmaDecoderState state;  /* it's about 24-80 bytes structure, if int is 32-bit */
  75   unsigned char properties[LZMA_PROPERTIES_SIZE];
  76
  77   int res;
  78
  79   if (sizeof(UInt32) < 4)
  80   {
  81 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
  82     printf("LZMA decoder needs correct UInt32\n");
  83 #endif
  84     return LZMA_RESULT_DATA_ERROR;
  85   }
  86
  87   {
  88     long length=s_len;
  89     if ((long)(SizeT)length != length)
  90     {
  91
  92 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
  93       printf("Too big compressed stream\n");
  94 #endif
  95       return LZMA_RESULT_DATA_ERROR;
  96     }
  97     compressedSize = (SizeT)(length - (LZMA_PROPERTIES_SIZE + 8));
  98   }
  99
 100   /* Read LZMA properties for compressed stream */
 101
 102   if (!MyReadFileAndCheck(source, properties, sizeof(properties)))
 103   {
 104
 105 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
 106     printf("%s\n", kCantReadMessage);
 107 #endif
 108     return LZMA_RESULT_DATA_ERROR;
 109   }
 110
 111   /* Read uncompressed size */
 112   {
 113     int i;
 114     for (i = 0; i < 8; i++)
 115     {
 116       unsigned char b;
 117       if (!MyReadFileAndCheck(source, &b, 1))
 118       {
 119
 120 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
 121         printf("%s\n", kCantReadMessage);
 122 #endif
 123         return LZMA_RESULT_DATA_ERROR;
 124       }
 125       if (b != 0xFF)
 126         waitEOS = 0;
 127       if (i < 4)
 128         outSize += (UInt32)(b) << (i * 8);
 129       else
 130         outSizeHigh += (UInt32)(b) << ((i - 4) * 8);
 131     }
 132
 133     if (waitEOS)
 134     {
 135
 136 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
 137       printf("Stream with EOS marker is not supported");
 138 #endif
 139       return LZMA_RESULT_DATA_ERROR;
 140     }
 141     outSizeFull = (SizeT)outSize;
 142     if (sizeof(SizeT) >= 8)
 143       outSizeFull |= (((SizeT)outSizeHigh << 16) << 16);
 144     else if (outSizeHigh != 0 || (UInt32)(SizeT)outSize != outSize)
 145     {
 146
 147 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
 148       printf("Too big uncompressed stream");
 149 #endif
 150       return LZMA_RESULT_DATA_ERROR;
 151     }
 152   }
 153
 154   /* Decode LZMA properties and allocate memory */
 155   if (LzmaDecodeProperties(&state.Properties, properties, LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK)
 156   {
 157
 158 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
 159     printf("Incorrect stream properties");
 160 #endif
 161     return LZMA_RESULT_DATA_ERROR;
 162   }
 163   state.Probs = (CProb *)malloc(LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
 164
 165   if (outSizeFull == 0)
 166     outStream = 0;
 167   else
 168   {
 169     if (outSizeFull > d_len)
 170       outStream = 0;
 171     else
 172       outStream = dest;
 173   }
 174
 175   if (compressedSize == 0)
 176     inStream = 0;
 177   else
 178   {
 179     if ((compressedSize+rpos) > s_len )
 180       inStream = 0;
 181     else
 182       inStream = source + rpos;
 183   }
 184
 185   if (state.Probs == 0
 186     || (outStream == 0 && outSizeFull != 0)
 187     || (inStream == 0 && compressedSize != 0)
 188     )
 189   {
 190     free(state.Probs);
 191
 192 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
 193     printf("%s\n", kCantAllocateMessage);
 194 #endif
 195     return LZMA_RESULT_DATA_ERROR;
 196   }
 197
 198   /* Decompress */
 199   {
 200     SizeT inProcessed;
 201     SizeT outProcessed;
 202     res = LzmaDecode(&state,
 203       inStream, compressedSize, &inProcessed,
 204       outStream, outSizeFull, &outProcessed);
 205     if (res != 0)
 206     {
 207
 208 #ifdef DEBUG_ENABLE_BOOTSTRAP_PRINTF
 209       printf("\nDecoding error = %d\n", res);
 210 #endif
 211       res = 1;
 212     }
 213     else
 214     {
 215       *d_len = outProcessed;
 216     }
 217   }
 218
 219   free(state.Probs);
 220   return res;
 221 }
 222
 223 #endif /* CONFIG_LZMA */