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 #include <console/console.h>
  15 #include <string.h>
  16
  17 unsigned long ulzma(unsigned char * src, unsigned char * dst);
  18
  19 unsigned long ulzma(unsigned char * src, unsigned char * dst)
  20 {
  21         unsigned char properties[LZMA_PROPERTIES_SIZE];
  22         UInt32 outSize;
  23         SizeT inProcessed;
  24         SizeT outProcessed;
  25         int res;
  26         CLzmaDecoderState state;
  27         SizeT mallocneeds;
  28         unsigned char scratchpad[15980];
  29
  30         memcpy(properties, src, LZMA_PROPERTIES_SIZE);
  31         outSize = *(UInt32 *)(src + LZMA_PROPERTIES_SIZE);
  32         if (LzmaDecodeProperties(&state.Properties, properties, LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK) {
  33                 printk_warning("lzma: Incorrect stream properties.\n");
  34                 return 0;
  35         }
  36         mallocneeds = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
  37         if (mallocneeds > 15980) {
  38                 printk_warning("lzma: Decoder scratchpad too small!\n");
  39                 return 0;
  40         }
  41         state.Probs = (CProb *)scratchpad;
  42         res = LzmaDecode(&state, src + LZMA_PROPERTIES_SIZE + 8, (SizeT)0xffffffff, &inProcessed,
  43                 dst, outSize, &outProcessed);
  44         if (res != 0) {
  45                 printk_warning("lzma: Decoding error = %d\n", res);
  46                 return 0;
  47         }
  48         return outSize;
  49 }