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package org.monte.media.io;

import java.io.IOException;
import java.nio.ByteOrder;
import javax.imageio.stream.ImageInputStreamImpl;


public abstract class ImageInputStreamImpl2 extends ImageInputStreamImpl {

    private static final int BYTE_BUF_LENGTH = 8192;
    
    byte[] byteBuf = new byte[BYTE_BUF_LENGTH];

    @Override
        public short readShort() throws IOException {
        readFully(byteBuf, 0, 2);

        if (byteOrder == ByteOrder.BIG_ENDIAN) {
            return (short)
                (((byteBuf[0] & 0xff) << 8) | ((byteBuf[1] & 0xff) << 0));
        } else {
            return (short)
                (((byteBuf[1] & 0xff) << 8) | ((byteBuf[0] & 0xff) << 0));
        }
    }
    public int readInt() throws IOException {
        readFully(byteBuf, 0, 4);

        if (byteOrder == ByteOrder.BIG_ENDIAN) {
            return
                (((byteBuf[0] & 0xff) << 24) | ((byteBuf[1] & 0xff) << 16) |
                 ((byteBuf[2] & 0xff) <<  8) | ((byteBuf[3] & 0xff) <<  0));
        } else {
            return
                (((byteBuf[3] & 0xff) << 24) | ((byteBuf[2] & 0xff) << 16) |
                 ((byteBuf[1] & 0xff) <<  8) | ((byteBuf[0] & 0xff) <<  0));
        }
    }

}