/*
 * *****************************************************************************
 * Copyright (C) 2005, International Business Machines Corporation and others.
 * All Rights Reserved.
 * *****************************************************************************
 */
// dlf13 internal 1.3 compatibility only

package com.ibm.icu.impl;

/**
 * @internal
 */
public final class ByteBuffer {
    private byte[] data;
    private int pos;
    private int limit;

    private ByteBuffer() {}

    public byte[] array() {
	byte[] result = new byte[limit];
	for (int i = 0; i < limit; ++i) {
	    result[i] = data[i];
	}
	return result;
    }

    public static ByteBuffer wrap(byte[] data) {
	if (data == null) throw new NullPointerException();
	ByteBuffer result = new ByteBuffer();
	result.data = data;
	result.pos = 0;
	result.limit = data.length;
	return result;
    }

    public int limit() {
	return limit;
    }

    public int remaining() {
        return limit - pos;
    }

    public byte get() {
        if (pos < limit) return data[pos++];
        throw new IndexOutOfBoundsException();
    }

    public void get(byte[] dst, int offset, int length) {
	if (offset < 0 || offset + length > dst.length || pos + length > limit) {
	    throw new IndexOutOfBoundsException();
	}
	for (int i = 0; i < length; ++i) {
	    dst[offset++] = data[pos++];
	}
    }
}