src/lib/lzma.c

   1 /*
   2
   3 Coreboot interface to memory-saving variant of LZMA decoder
   4
   5 (C)opyright 2006 Carl-Daniel Hailfinger
   6 Released under the GNU GPL v2 or later
   7
   8 Parts of this file are based on C/7zip/Compress/LZMA_C/LzmaTest.c from the LZMA
   9 SDK 4.42, which is written and distributed to public domain by Igor Pavlov.
  10
  11 */
  12
  13 #include "lzmadecode.c"
  14
  15
  16 static unsigned long ulzma(unsigned char * src, unsigned char * dst)
  17 {
  18         unsigned char properties[LZMA_PROPERTIES_SIZE];
  19         UInt32 outSize;
  20         SizeT inProcessed;
  21         SizeT outProcessed;
  22         int res;
  23         CLzmaDecoderState state;
  24         SizeT mallocneeds;
  25         unsigned char scratchpad[15980];
  26
  27         memcpy(properties, src, LZMA_PROPERTIES_SIZE);
  28         outSize = *(UInt32 *)(src + LZMA_PROPERTIES_SIZE);
  29         if (LzmaDecodeProperties(&state.Properties, properties, LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK) {
  30                 printk_warning("Incorrect stream properties\n");
  31                 return 0;
  32         }
  33         mallocneeds = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
  34         if (mallocneeds > 15980) {
  35                 printk_warning("Decoder scratchpad too small!\n");
  36                 return 0;
  37         }
  38         state.Probs = (CProb *)scratchpad;
  39         res = LzmaDecode(&state, src + LZMA_PROPERTIES_SIZE + 8, (SizeT)0xffffffff, &inProcessed,
  40                 dst, outSize, &outProcessed);
  41         if (res != 0) {
  42                 printk_warning("Decoding error = %d\n", res);
  43                 return 0;
  44         }
  45         return outSize;
  46 }