/* Copyright (C) 2017 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
 * 
 * You can redistribute this program and/or modify it under the terms of
 * the GNU Lesser Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 */
using System;
using System.Collections.Generic;
using Utilities;

namespace SMBLibrary
{
    /// <summary>
    /// [MS-FSCC] 2.1.7 - FILE_NAME_INFORMATION
    /// [MS-FSCC] 2.4.25 - FileNameInformation
    /// </summary>
    public class FileNameInformation : FileInformation
    {
        public const int FixedLength = 4;

        private uint FileNameLength;
        public string FileName = String.Empty;

        public FileNameInformation()
        {
        }

        public FileNameInformation(byte[] buffer, int offset)
        {
            FileNameLength = LittleEndianConverter.ToUInt32(buffer, offset + 0);
            FileName = ByteReader.ReadUTF16String(buffer, offset + 4, (int)FileNameLength / 2);
        }

        public override void WriteBytes(byte[] buffer, int offset)
        {
            FileNameLength = (uint)(FileName.Length * 2);
            LittleEndianWriter.WriteUInt32(buffer, offset + 0, FileNameLength);
            ByteWriter.WriteUTF16String(buffer, offset + 4, FileName);
        }

        public override FileInformationClass FileInformationClass
        {
            get
            {
                return FileInformationClass.FileNameInformation;
            }
        }

        public override int Length
        {
            get
            {
                return FixedLength + FileName.Length * 2;
            }
        }
    }
}