Subversion Repositories mkgmap

/*
 * Copyright (C) 2008 Steve Ratcliffe
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *
 * Author: Steve Ratcliffe
 * Create date: 19-Jul-2008
 */
package uk.me.parabola.imgfmt.app;

import java.io.IOException;
import java.nio.ByteBuffer;

/**
 * A section writer wraps a regular writer so that all the offsets
 * are relative to the start of a section.
 *
 * @author Steve Ratcliffe
 */
public class SectionWriter implements ImgFileWriter {

        private final ImgFileWriter writer;
        private final Section section;
        private final int secStart;

        public SectionWriter(ImgFileWriter writer, Section section) {
                this.writer = writer;
                this.secStart = section.getPosition();
                this.section = section;
        }

        public void sync() throws IOException {
                writer.sync();
        }

        /**
         * Note that this does not close the underlying file.
         */
        public void close() {
                if (section != null)
                        section.setSize(writer.position() - secStart);
                //writer.close();
        }

        public int position() {
                return writer.position() - secStart;
        }

        public void position(long pos) {
                writer.position(pos + secStart);
        }

        public void put(byte b) {
                writer.put(b);
        }

        public void putChar(char c) {
                writer.putChar(c);
        }

        public void put3(int val) {
                writer.put3(val);
        }

        public void putInt(int val) {
                writer.putInt(val);
        }

        public void put(byte[] val) {
                writer.put(val);
        }

        public void put(byte[] src, int start, int length) {
                writer.put(src, start, length);
        }

        public void put(ByteBuffer src) {
                writer.put(src);
        }

        public long getSize() {
                throw new UnsupportedOperationException("Cannot get size at this point");
        }
}