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 <stdlib.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include "lzmadecode.c"
  17
  18 unsigned long ulzman(const unsigned char *src, unsigned long srcn,
  19                      unsigned char *dst, unsigned long dstn)
  20 {
  21         unsigned char properties[LZMA_PROPERTIES_SIZE];
  22         const int data_offset = LZMA_PROPERTIES_SIZE + 8;
  23         UInt32 outSize;
  24         SizeT inProcessed;
  25         SizeT outProcessed;
  26         int res;
  27         CLzmaDecoderState state;
  28         SizeT mallocneeds;
  29         unsigned char *scratchpad;
  30
  31         if (srcn < data_offset) {
  32                 printf("lzma: Input too small.\n");
  33                 return 0;
  34         }
  35
  36         memcpy(properties, src, LZMA_PROPERTIES_SIZE);
  37         memcpy(&outSize, src + LZMA_PROPERTIES_SIZE, sizeof(outSize));
  38         if (outSize > dstn)
  39                 outSize = dstn;
  40         if (LzmaDecodeProperties(&state.Properties, properties,
  41                                  LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK) {
  42                 printf("lzma: Incorrect stream properties.\n");
  43                 return 0;
  44         }
  45         mallocneeds = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
  46         scratchpad = malloc(mallocneeds);
  47         if (!scratchpad) {
  48                 printf("lzma: Cannot allocate %u bytes for scratchpad!\n",
  49                        mallocneeds);
  50                 return 0;
  51         }
  52         state.Probs = (CProb *)scratchpad;
  53         res = LzmaDecode(&state, src + data_offset, srcn - data_offset,
  54                          &inProcessed, dst, outSize, &outProcessed);
  55         free(scratchpad);
  56         if (res != 0) {
  57                 printf("lzma: Decoding error = %d\n", res);
  58                 return 0;
  59         }
  60         return outProcessed;
  61 }
  62
  63 unsigned long ulzma(const unsigned char *src, unsigned char *dst)
  64 {
  65         return ulzman(src, (unsigned long)(-1), dst, (unsigned long)(-1));
  66 }