misc/libphysfs/lzma/CPP/7zip/Common/InBuffer.cpp
author sheepluva
Wed, 16 May 2018 18:22:28 +0200
branchui-scaling
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parent 12213 bb5522e88ab2
permissions -rw-r--r--
adjust label, update ChangeLog
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// InBuffer.cpp
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#include "StdAfx.h"
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#include "InBuffer.h"
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extern "C"
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{
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  #include "../../../C/Alloc.h"
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}
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CInBuffer::CInBuffer(): 
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  _buffer(0), 
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  _bufferLimit(0), 
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  _bufferBase(0), 
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  _stream(0),
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  _bufferSize(0)
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{}
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bool CInBuffer::Create(UInt32 bufferSize)
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{
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  const UInt32 kMinBlockSize = 1;
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  if (bufferSize < kMinBlockSize)
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    bufferSize = kMinBlockSize;
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  if (_bufferBase != 0 && _bufferSize == bufferSize)
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    return true;
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  Free();
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  _bufferSize = bufferSize;
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  _bufferBase = (Byte *)::MidAlloc(bufferSize);
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  return (_bufferBase != 0);
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}
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void CInBuffer::Free()
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{
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  ::MidFree(_bufferBase);
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  _bufferBase = 0;
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}
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void CInBuffer::SetStream(ISequentialInStream *stream)
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{
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  _stream = stream;
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}
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void CInBuffer::Init()
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{
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  _processedSize = 0;
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  _buffer = _bufferBase;
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  _bufferLimit = _buffer;
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  _wasFinished = false;
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  #ifdef _NO_EXCEPTIONS
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  ErrorCode = S_OK;
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  #endif
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}
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bool CInBuffer::ReadBlock()
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{
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  #ifdef _NO_EXCEPTIONS
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  if (ErrorCode != S_OK)
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    return false;
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  #endif
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  if (_wasFinished)
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    return false;
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  _processedSize += (_buffer - _bufferBase);
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  UInt32 numProcessedBytes;
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  HRESULT result = _stream->Read(_bufferBase, _bufferSize, &numProcessedBytes);
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  #ifdef _NO_EXCEPTIONS
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  ErrorCode = result;
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  #else
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  if (result != S_OK)
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    throw CInBufferException(result);
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  #endif
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  _buffer = _bufferBase;
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  _bufferLimit = _buffer + numProcessedBytes;
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  _wasFinished = (numProcessedBytes == 0);
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  return (!_wasFinished);
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}
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diff changeset
    78
Byte CInBuffer::ReadBlock2()
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:
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    79
{
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
    80
  if(!ReadBlock())
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
    81
    return 0xFF;
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
    82
  return *_buffer++;
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
    83
}