/*
 * *****************************************************************************
 * Copyright (C) 2006, 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++];
        }
    }
    public static final ByteBuffer allocate(int size){
        ByteBuffer ret = new ByteBuffer();
        ret.data = new byte[size];
        return ret;
    }
}