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-rwxr-xr-xCPP/7zip/Archive/Common/InStreamWithCRC.cpp42
1 files changed, 42 insertions, 0 deletions
diff --git a/CPP/7zip/Archive/Common/InStreamWithCRC.cpp b/CPP/7zip/Archive/Common/InStreamWithCRC.cpp
new file mode 100755
index 0000000..6338d0a
--- /dev/null
+++ b/CPP/7zip/Archive/Common/InStreamWithCRC.cpp
@@ -0,0 +1,42 @@
+// InStreamWithCRC.cpp
+
+#include "StdAfx.h"
+
+#include "InStreamWithCRC.h"
+
+STDMETHODIMP CSequentialInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize)
+{
+ UInt32 realProcessedSize;
+ HRESULT result = _stream->Read(data, size, &realProcessedSize);
+ _size += realProcessedSize;
+ if (size > 0 && realProcessedSize == 0)
+ _wasFinished = true;
+ _crc = CrcUpdate(_crc, data, realProcessedSize);
+ if(processedSize != NULL)
+ *processedSize = realProcessedSize;
+ return result;
+}
+
+STDMETHODIMP CInStreamWithCRC::Read(void *data, UInt32 size, UInt32 *processedSize)
+{
+ UInt32 realProcessedSize;
+ HRESULT result = _stream->Read(data, size, &realProcessedSize);
+ /*
+ if (size > 0 && realProcessedSize == 0)
+ _wasFinished = true;
+ */
+ _size += realProcessedSize;
+ _crc = CrcUpdate(_crc, data, realProcessedSize);
+ if(processedSize != NULL)
+ *processedSize = realProcessedSize;
+ return result;
+}
+
+STDMETHODIMP CInStreamWithCRC::Seek(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition)
+{
+ if (seekOrigin != STREAM_SEEK_SET || offset != 0)
+ return E_FAIL;
+ _size = 0;
+ _crc = CRC_INIT_VAL;
+ return _stream->Seek(offset, seekOrigin, newPosition);
+}