using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using Biff8Excel.Interfaces;

namespace Biff8Excel.Records
{
    [StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Auto, Pack = 1)]
    struct RecordFooter
    {
        public ushort opcode;
        public ushort length;
        public ushort TextLength;
        [MarshalAs(UnmanagedType.U1, SizeConst = 1)]        public byte zero;
    }

    internal class Footer : IRecords 
    {
        RecordFooter footer;
        byte[] m_footer;

        public Footer()
        {
            footer.opcode = 0x15;
            footer.zero = 0x1;
        }

        public byte[] Foot
        {
            set { m_footer = value; }
        }

        public ushort TextLength
        {
            set { footer.TextLength = value; }
        }

        #region IRecords ³ΙΤ±

        public byte[] GetByte()
        {
            byte[] b;
            int len = m_footer.Length + 7;
            b = new byte[len];

            footer.length = (ushort)(len - 4);
            //footer.TextLength = (ushort)(len - 7);

            Globals.GetStructToBytes(footer).CopyTo(b, 0);

            m_footer.CopyTo(b, 7);
            return b;

        }

        #endregion
    }
}