Refactor image classes and split them to smaller files.

DiscImageChef.DiscImages/BLU/Identify.cs

@@ -0,0 +1,66 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Identify.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Disk image plugins.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Identifies Basic Lisa Utility disk images.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     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, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2018 Natalia Portillo
+// ****************************************************************************/
+
+using System;
+using System.IO;
+using DiscImageChef.CommonTypes.Interfaces;
+
+namespace DiscImageChef.DiscImages
+{
+    public partial class Blu
+    {
+        public bool Identify(IFilter imageFilter)
+        {
+            Stream stream = imageFilter.GetDataForkStream();
+            stream.Seek(0, SeekOrigin.Begin);
+
+            if(stream.Length < 0x200) return false;
+
+            byte[] header = new byte[0x17];
+            stream.Read(header, 0, 0x17);
+
+            BluHeader tmpHdr = new BluHeader {DeviceName = new byte[0x0D]};
+            BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
+
+            Array.Copy(header, 0, tmpHdr.DeviceName, 0, 0x0D);
+            tmpHdr.DeviceType    = BigEndianBitConverter.ToUInt32(header, 0x0C) & 0x00FFFFFF;
+            tmpHdr.DeviceBlocks  = BigEndianBitConverter.ToUInt32(header, 0x11) & 0x00FFFFFF;
+            tmpHdr.BytesPerBlock = BigEndianBitConverter.ToUInt16(header, 0x15);
+
+            for(int i = 0; i < 0xD; i++)
+                if(tmpHdr.DeviceName[i] < 0x20)
+                    return false;
+
+            return (tmpHdr.BytesPerBlock & 0xFE00) == 0x200;
+        }
+    }
+}