//
// SRationalArrayIFDEntry.cs:
//
// Author:
//   Ruben Vermeersch (ruben@savanne.be)
//   Mike Gemuende (mike@gemuende.de)
//
// Copyright (C) 2009 Ruben Vermeersch
// Copyright (C) 2009 Mike Gemuende
//
// 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
//

namespace TagLib.IFD.Entries
{
	/// <summary>
	///    Contains a SRATIONAL value with a count > 1
	/// </summary>
	public class SRationalArrayIFDEntry : ArrayIFDEntry<SRational>
	{

		#region Constructors

		/// <summary>
		///    Construcor.
		/// </summary>
		/// <param name="tag">
		///    A <see cref="System.UInt16"/> with the tag ID of the entry this instance
		///    represents
		/// </param>
		/// <param name="entries">
		///    A <see cref="T:SRational[]"/> to be stored
		/// </param>
		public SRationalArrayIFDEntry (ushort tag, SRational[] entries)
			: base (tag)
		{
			Values = entries;
		}

		#endregion

		#region Public Methods

		/// <summary>
		///    Renders the current instance to a <see cref="ByteVector"/>
		/// </summary>
		/// <param name="is_bigendian">
		///    A <see cref="System.Boolean"/> indicating the endianess for rendering.
		/// </param>
		/// <param name="offset">
		///    A <see cref="System.UInt32"/> with the offset, the data is stored.
		/// </param>
		/// <param name="type">
		///    A <see cref="System.UInt16"/> the ID of the type, which is rendered
		/// </param>
		/// <param name="count">
		///    A <see cref="System.UInt32"/> with the count of the values which are
		///    rendered.
		/// </param>
		/// <returns>
		///    A <see cref="ByteVector"/> with the rendered data.
		/// </returns>
		public override ByteVector Render (bool is_bigendian, uint offset, out ushort type, out uint count)
		{
			type = (ushort)IFDEntryType.SRational;
			count = (uint)Values.Length;

			ByteVector data = new ByteVector ();
			foreach (SRational rational in Values) {
				data.Add (ByteVector.FromInt (rational.Numerator, is_bigendian));
				data.Add (ByteVector.FromInt (rational.Denominator, is_bigendian));
			}

			return data;
		}

		#endregion
	}
}
