WIP: Added packing of AR and TAR

AMWD.Common/Packing/Ar/ArFileInfo.cs

@@ -0,0 +1,53 @@
+using System;
+
+//[assembly: System.Runtime.CompilerServices.InternalsVisibleTo("UnitTests")]
+
+namespace AMWD.Common.Packing.Ar
+{
+	/// <summary>
+	/// Represents the file information saved in the archive.
+	/// </summary>
+	[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+	public class ArFileInfo
+	{
+		/// <summary>
+		/// Gets or sets the file name.
+		/// </summary>
+		public string FileName { get; set; }
+
+		/// <summary>
+		/// Gets or sets the file size in bytes.
+		/// </summary>
+		public long FileSize { get; set; }
+
+		/// <summary>
+		/// Gets or sets the timestamp of the last modification.
+		/// </summary>
+		public DateTime ModifyTime { get; set; }
+
+		/// <summary>
+		/// Gets or sets the user id.
+		/// </summary>
+		public int UserId { get; set; }
+
+		/// <summary>
+		/// Gets or sets the group id.
+		/// </summary>
+		public int GroupId { get; set; }
+
+		/// <summary>
+		/// Gets or sets the access mode in decimal (not octal!).
+		/// </summary>
+		/// <remarks>
+		/// To see the octal representation use <c>Convert.ToString(Mode, 8)</c>.
+		/// </remarks>
+		public int Mode { get; set; }
+	}
+
+	internal class ArFileInfoExtended : ArFileInfo
+	{
+		public long HeaderPosition { get; set; }
+
+		public long DataPosition { get; set; }
+	}
+}