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Sourcecode: taglib-sharp version File versions

HeaderExtensionObject.cs

/***************************************************************************
    copyright            : (C) 2005 by Brian Nickel
    email                : brian.nickel@gmail.com
 ***************************************************************************/

/***************************************************************************
 *   This library is free software; you can redistribute it and/or modify  *
 *   it  under the terms of the GNU Lesser General Public License version  *
 *   2.1 as published by the Free Software Foundation.                     *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful, but   *
 *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the Free Software   *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
 *   USA                                                                   *
 ***************************************************************************/

using System.Collections.Generic;
using System;

namespace TagLib.Asf {
      public class HeaderExtensionObject : Object
      {
            #region Private Fields
            
            private List<Object> children;
            
            #endregion
            
            
            
            #region Constructors
            
            public HeaderExtensionObject (Asf.File file, long position) : base (file, position)
            {
                  if (!Guid.Equals (Asf.Guid.AsfHeaderExtensionObject))
                        throw new CorruptFileException ("Object GUID incorrect.");
                  
                  children = new List<Object> ();
                  
                  if (file.ReadGuid () != Asf.Guid.AsfReserved1)
                        throw new CorruptFileException ("Reserved1 GUID expected.");
                  
                  if (file.ReadWord () != 6)
                        throw new CorruptFileException ("Invalid reserved WORD. Expected '6'.");
                  
                  uint size_remaining = file.ReadDWord ();
                  position += 0x170 / 8;
                  
                  while (size_remaining > 0) {
                        Object obj = file.ReadObject (position);
                        position += (long) obj.OriginalSize;
                        size_remaining -= (uint) obj.OriginalSize;
                        children.Add (obj);
                  }
            }
            
            #endregion
            
            
            
            #region Public Properties
            
            public IEnumerable<Object> Children {get {return children;}}
            
            #endregion
            
            
            
            #region Public Methods
            
            public override ByteVector Render ()
            {
                  ByteVector output = new ByteVector ();
                  
                  foreach (Object child in children)
                        output.Add (child.Render ());
                  
                  output.Insert (0, RenderDWord ((uint) output.Count));
                  output.Insert (0, RenderWord (6));
                  output.Insert (0, Asf.Guid.AsfReserved1.ToByteArray ());
                  
                  return Render (output);
            }
            
            public void AddObject (Object obj)
            {
                  children.Add (obj);
            }
            
            public void AddUniqueObject (Object obj)
            {
                  for (int i = 0; i < children.Count; i ++)
                        if (((Object) children [i]).Guid == obj.Guid) {
                              children [i] = obj;
                              return;
                        }
                  
                  children.Add (obj);
            }
            
            #endregion
      }
}

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