3.13

7zip/Archive/Cab/CabInBuffer.h

@@ -0,0 +1,62 @@
+// Archive/CabInBuffer.h
+
+#pragma once
+
+#ifndef __ARCHIVE_CAB_INBUFFER_H
+#define __ARCHIVE_CAB_INBUFFER_H
+
+#include "../../IStream.h"
+
+namespace NArchive {
+namespace NCab {
+
+class CInBuffer
+{
+  UINT64 m_ProcessedSize;
+  UINT32 m_Pos;
+  UINT32 m_NumReadBytesInBuffer;
+  BYTE *m_Buffer;
+  ISequentialInStream *m_Stream;
+  UINT32 m_BufferSize;
+  
+  UINT32 m_NumBlocks;
+  UINT32 m_CurrentBlockIndex;
+  UINT32 m_ReservedSize;
+
+public:
+  CInBuffer(UINT32 bufferSize = 0x20000);
+  ~CInBuffer();
+  
+  void Init(ISequentialInStream *inStream, BYTE reservedSize, UINT32 numBlocks);
+  // void ReleaseStream();
+
+  bool ReadByte(BYTE &b)
+    {
+      if(m_Pos >= m_NumReadBytesInBuffer)
+        return false;
+      b = m_Buffer[m_Pos++];
+      return true;
+    }
+  BYTE ReadByte()
+    {
+      if(m_Pos >= m_NumReadBytesInBuffer)
+        return 0;
+      return m_Buffer[m_Pos++];
+    }
+  /*
+    void ReadBytes(void *data, UINT32 size, UINT32 &aProcessedSize)
+    {
+      BYTE *aDataPointer = (BYTE *)data;
+      for(int i = 0; i < size; i++)
+        if (!ReadByte(aDataPointer[i]))
+          break;
+      aProcessedSize = i;
+    }
+  */
+  HRESULT ReadBlock(UINT32 &uncompressedSize, bool &dataAreCorrect);
+  UINT64 GetProcessedSize() const { return m_ProcessedSize + m_Pos; }
+};
+
+}}
+
+#endif