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-rwxr-xr-xCS/7zip/Common/InBuffer.cs72
1 files changed, 72 insertions, 0 deletions
diff --git a/CS/7zip/Common/InBuffer.cs b/CS/7zip/Common/InBuffer.cs
new file mode 100755
index 0000000..9c47c73
--- /dev/null
+++ b/CS/7zip/Common/InBuffer.cs
@@ -0,0 +1,72 @@
+// InBuffer.cs
+
+namespace SevenZip.Buffer
+{
+ public class InBuffer
+ {
+ byte[] m_Buffer;
+ uint m_Pos;
+ uint m_Limit;
+ uint m_BufferSize;
+ System.IO.Stream m_Stream;
+ bool m_StreamWasExhausted;
+ ulong m_ProcessedSize;
+
+ public InBuffer(uint bufferSize)
+ {
+ m_Buffer = new byte[bufferSize];
+ m_BufferSize = bufferSize;
+ }
+
+ public void Init(System.IO.Stream stream)
+ {
+ m_Stream = stream;
+ m_ProcessedSize = 0;
+ m_Limit = 0;
+ m_Pos = 0;
+ m_StreamWasExhausted = false;
+ }
+
+ public bool ReadBlock()
+ {
+ if (m_StreamWasExhausted)
+ return false;
+ m_ProcessedSize += m_Pos;
+ int aNumProcessedBytes = m_Stream.Read(m_Buffer, 0, (int)m_BufferSize);
+ m_Pos = 0;
+ m_Limit = (uint)aNumProcessedBytes;
+ m_StreamWasExhausted = (aNumProcessedBytes == 0);
+ return (!m_StreamWasExhausted);
+ }
+
+
+ public void ReleaseStream()
+ {
+ // m_Stream.Close();
+ m_Stream = null;
+ }
+
+ public bool ReadByte(byte b) // check it
+ {
+ if (m_Pos >= m_Limit)
+ if (!ReadBlock())
+ return false;
+ b = m_Buffer[m_Pos++];
+ return true;
+ }
+
+ public byte ReadByte()
+ {
+ // return (byte)m_Stream.ReadByte();
+ if (m_Pos >= m_Limit)
+ if (!ReadBlock())
+ return 0xFF;
+ return m_Buffer[m_Pos++];
+ }
+
+ public ulong GetProcessedSize()
+ {
+ return m_ProcessedSize + m_Pos;
+ }
+ }
+}