//======================================
//        Copyright (C) 2014-2015 xkMob Technology Co., Ltd.   
//        All rights reserved
//
//        filename :CircleBuffer.cs
//        description :
//======================================
using System;
using System.Collections;


public class CircleBuffer
{

    public static int MAX_RECEIVE_BUFFER_SIZE = 1024 * 2 * 1024; // 32k

    public int Length
    {
        get;
        internal set;
    }
    public byte[] DataBuffer
    {
        get;
        internal set;
    }
    public int LeftSpaceSize
    {
        get
        {
            return MAX_RECEIVE_BUFFER_SIZE - Length;
        }
    }


    public CircleBuffer()
    {
        DataBuffer = new byte[MAX_RECEIVE_BUFFER_SIZE];
        //Offset = 0;
        Length = 0;
    }
    public void Enlarge(int bufLength)
    {
        //Helpers.DebugAssert(Length + bufLength <= MAX_RECEIVE_BUFFER_SIZE);
        //if(Length + bufLength > SocketMgr.MAX_RECEIVE_BUFFER_SIZE)

        //	Debug.LogError("CircleBuffer Enlarge Out of Range ");

        //Array.Copy(buf, 0, DataBuffer, Length, bufLength);
        Length += bufLength;

    }
    public void Shrink(int size)
    {
        if (size >= Length)
            Length = 0;
        else
        {
            Array.Copy(DataBuffer, size, DataBuffer, 0, Length - size);
            Length -= size;
        }
    }
}