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Mini Shell
Mini Shell
package SevenZip.Common;
import java.io.IOException;
import java.io.InputStream;
public class InBuffer {
int _bufferPos;
int _bufferLimit;
byte [] _bufferBase;
InputStream _stream = null; // CMyComPtr<ISequentialInStream>
long _processedSize;
int _bufferSize;
boolean _wasFinished;
public InBuffer() {
}
// ~CInBuffer() { Free(); }
public void Create(int bufferSize) {
final int kMinBlockSize = 1;
if (bufferSize < kMinBlockSize)
bufferSize = kMinBlockSize;
if (_bufferBase != null && _bufferSize == bufferSize)
return ;
Free();
_bufferSize = bufferSize;
_bufferBase = new byte[bufferSize];
}
void Free() {
_bufferBase = null;
}
public void SetStream(InputStream stream) { // ISequentialInStream
_stream = stream;
}
public void Init() {
_processedSize = 0;
_bufferPos = 0; // = _bufferBase;
_bufferLimit = 0; // _buffer;
_wasFinished = false;
}
public void ReleaseStream() throws IOException {
if (_stream != null) _stream.close(); // _stream.Release();
_stream = null;
}
public int read() throws IOException {
if(_bufferPos >= _bufferLimit)
return ReadBlock2();
return _bufferBase[_bufferPos++] & 0xFF;
}
public boolean ReadBlock() throws IOException {
if (_wasFinished)
return false;
_processedSize += _bufferPos; // (_buffer - _bufferBase);
int numProcessedBytes = _stream.read(_bufferBase, 0,_bufferSize);
if (numProcessedBytes == -1) numProcessedBytes = 0; // EOF
_bufferPos = 0; // _bufferBase;
_bufferLimit = numProcessedBytes; // _buffer + numProcessedBytes;
_wasFinished = (numProcessedBytes == 0);
return (!_wasFinished);
}
public int ReadBlock2() throws IOException {
if(!ReadBlock())
return -1; // 0xFF;
return _bufferBase[_bufferPos++] & 0xFF;
}
public long GetProcessedSize() { return _processedSize + (_bufferPos); }
public boolean WasFinished() { return _wasFinished; }
}
Zerion Mini Shell 1.0