Extract out FileTypes namespace

SabreTools.FileTypes/Aaru/IndexEntry.cs

@@ -0,0 +1,40 @@
+using System.IO;
+using System.Text;
+
+using SabreTools.Core;
+
+namespace SabreTools.FileTypes.Aaru
+{
+    /// <summary>
+    /// Index entry
+    /// </summary>
+    /// <see cref="https://github.com/aaru-dps/Aaru/blob/master/Aaru.Images/AaruFormat/Structs.cs" />
+    public class IndexEntry
+    {
+        /// <summary>Type of item pointed by this entry</summary>
+        public AaruBlockType blockType;
+        /// <summary>Type of data contained by the block pointed by this entry</summary>
+        public AaruDataType dataType;
+        /// <summary>Offset in file where item is stored</summary>
+        public ulong offset;
+
+        /// <summary>
+        /// Read a stream as an IndexHeader
+        /// </summary>
+        /// <param name="stream">IndexHeader as a stream</param>
+        /// <returns>Populated IndexHeader, null on failure</returns>
+        public static IndexEntry Deserialize(Stream stream)
+        {
+            IndexEntry indexEntry = new IndexEntry();
+
+            using (BinaryReader br = new BinaryReader(stream, Encoding.Default, true))
+            {
+                indexEntry.blockType = (AaruBlockType)br.ReadUInt32();
+                indexEntry.dataType = (AaruDataType)br.ReadUInt16();
+                indexEntry.offset = br.ReadUInt64();
+            }
+
+            return indexEntry;
+        }
+    }
+}