misc/libphysfs/lzma/CPP/7zip/Compress/LZMA_Alone/LzmaRamDecode.c
author nemo
Mon, 10 Apr 2017 12:06:43 -0400
changeset 12213 bb5522e88ab2
permissions -rw-r--r--
bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
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/* LzmaRamDecode.c */
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#include "LzmaRamDecode.h"
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#ifdef _SZ_ONE_DIRECTORY
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#include "LzmaDecode.h"
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#include "BranchX86.h"
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#else
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#include "../../../../C/Compress/Lzma/LzmaDecode.h"
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#include "../../../../C/Compress/Branch/BranchX86.h"
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#endif
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#define LZMA_PROPS_SIZE 14
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#define LZMA_SIZE_OFFSET 6
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int LzmaRamGetUncompressedSize(
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    const unsigned char *inBuffer, 
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    size_t inSize, 
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    size_t *outSize)
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{
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  unsigned int i;
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  if (inSize < LZMA_PROPS_SIZE)
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    return 1;
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  *outSize = 0;
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  for(i = 0; i < sizeof(size_t); i++)
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    *outSize += ((size_t)inBuffer[LZMA_SIZE_OFFSET + i]) << (8 * i);
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  for(; i < 8; i++)
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    if (inBuffer[LZMA_SIZE_OFFSET + i] != 0)
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      return 1;
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  return 0;
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}
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#define SZE_DATA_ERROR (1)
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#define SZE_OUTOFMEMORY (2)
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int LzmaRamDecompress(
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    const unsigned char *inBuffer, 
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    size_t inSize,
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    unsigned char *outBuffer,
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    size_t outSize,
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    size_t *outSizeProcessed,
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    void * (*allocFunc)(size_t size), 
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    void (*freeFunc)(void *))
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{
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  CLzmaDecoderState state;  /* it's about 24 bytes structure, if int is 32-bit */
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  int result;
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  SizeT outSizeProcessedLoc;
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  SizeT inProcessed;
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  int useFilter;
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  if (inSize < LZMA_PROPS_SIZE)
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    return 1;
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  useFilter = inBuffer[0];
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  *outSizeProcessed = 0;
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  if (useFilter > 1)
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    return 1;
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  if (LzmaDecodeProperties(&state.Properties, inBuffer + 1, LZMA_PROPERTIES_SIZE) != LZMA_RESULT_OK)
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    return 1;
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  state.Probs = (CProb *)allocFunc(LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
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  if (state.Probs == 0)
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    return SZE_OUTOFMEMORY;
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  result = LzmaDecode(&state,
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    inBuffer + LZMA_PROPS_SIZE, (SizeT)inSize - LZMA_PROPS_SIZE, &inProcessed,
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    outBuffer, (SizeT)outSize, &outSizeProcessedLoc);
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  freeFunc(state.Probs);
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  if (result != LZMA_RESULT_OK)
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    return 1;
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  *outSizeProcessed = (size_t)outSizeProcessedLoc;
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  if (useFilter == 1)
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  {
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    UInt32 x86State;
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    x86_Convert_Init(x86State);
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    75
    x86_Convert(outBuffer, (SizeT)outSizeProcessedLoc, 0, &x86State, 0);
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    76
  }
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    77
  return 0;
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    78
}