package hex.genmodel.utils;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* Simplified version and drop-in replacement of water.util.AutoBuffer
*/
public final class ByteBufferWrapper {
// The direct ByteBuffer for schlorping data about.
// Set to null to indicate the ByteBufferWrapper is closed.
ByteBuffer _bb;
/** Read from a fixed byte[]; should not be closed. */
public ByteBufferWrapper(byte[] buf) {
assert buf != null : "null fed to ByteBuffer.wrap";
_bb = ByteBuffer.wrap(buf, 0, buf.length).order(ByteOrder.nativeOrder());
}
public int position() {
return _bb.position();
}
public boolean hasRemaining() {
return _bb.hasRemaining();
}
/** Skip over some bytes in the byte buffer. Caller is responsible for not
* reading off end of the bytebuffer; generally this is easy for
* array-backed autobuffers and difficult for i/o-backed bytebuffers. */
public void skip(int skip) {
_bb.position(_bb.position() + skip);
}
// -----------------------------------------------
// Unlike original getX() methods, these will not attempt to auto-widen the buffer.
public int get1U() {
return _bb.get() & 0xFF;
}
public char get2() {
return _bb.getChar();
}
public int get3() {
return get1U() | (get1U() << 8) | (get1U() << 16);
}
public int get4() {
return _bb.getInt();
}
public float get4f() {
return _bb.getFloat();
}
public double get8d() {
return _bb.getDouble();
}
}