payloads/libpayload/liblzma/lzma.c

   1 /*
   2  * coreboot interface to memory-saving variant of LZMA decoder
   3  *
   4  * Copyright (C) 2006 Carl-Daniel Hailfinger
   5  * Released under the BSD license
   6  *
   7  * Parts of this file are based on C/7zip/Compress/LZMA_C/LzmaTest.c from the LZMA
   8  * SDK 4.42, which is written and distributed to public domain by Igor Pavlov.
   9  *
  10  */
  11
  12 #include <lzma.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include "lzmadecode.c"
  16
  17 unsigned long ulzma(unsigned char * src, unsigned char * dst)
  18 {
  19         unsigned char properties[LZMA_PROPERTIES_SIZE];
  20         UInt32 outSize;
  21         SizeT inProcessed;
  22         SizeT outProcessed;
  23         int res;
  24         CLzmaDecoderState state;
  25         SizeT mallocneeds;
  26         unsigned char scratchpad[15980];
  27
  28         memcpy(properties, src, LZMA_PROPERTIES_SIZE);
  29         outSize = *(UInt32 *)(src + LZMA_PROPERTIES_SIZE);
  30         if (LzmaDecodeProperties(&state.Properties, properties, LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK) {
  31                 printf("lzma: Incorrect stream properties.\n");
  32                 return 0;
  33         }
  34         mallocneeds = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
  35         if (mallocneeds > 15980) {
  36                 printf("lzma: Decoder scratchpad too small!\n");
  37                 return 0;
  38         }
  39         state.Probs = (CProb *)scratchpad;
  40         res = LzmaDecode(&state, src + LZMA_PROPERTIES_SIZE + 8, (SizeT)0xffffffff, &inProcessed,
  41                 dst, outSize, &outProcessed);
  42         if (res != 0) {
  43                 printf("lzma: Decoding error = %d\n", res);
  44                 return 0;
  45         }
  46         return outSize;
  47 }