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package makamys.neodymium.util;
import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.ShortBuffer;
public class BufferWriter {
private ByteBuffer buf;
private FloatBuffer floatBuffer;
private ShortBuffer shortBuffer;
private IntBuffer intBuffer;
public BufferWriter(ByteBuffer buf) {
this.buf = buf;
this.floatBuffer = buf.asFloatBuffer();
this.shortBuffer = buf.asShortBuffer();
this.intBuffer = buf.asIntBuffer();
}
private void incrementPosition(int add) {
buf.position(buf.position() + add);
floatBuffer.position(buf.position() / 4);
shortBuffer.position(buf.position() / 2);
intBuffer.position(buf.position() / 4);
}
public void writeFloat(float x) {
try {
floatBuffer.put(x);
incrementPosition(4);
} catch(Exception e){
e.printStackTrace();
}
}
public void writeInt(int x) {
intBuffer.put(x);
incrementPosition(4);
}
public void writeByte(byte x) {
buf.put(x); // this increments the buffer position by 1
incrementPosition(0);
}
public int position() {
return buf.position();
}
public void writeShort(short s) {
shortBuffer.put(s);
incrementPosition(2);
}
}
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