Refactor image classes and split them to smaller files.

2025-12-16 19:24:25 +00:00 · 2018-07-23 23:25:43 +01:00
parent 55ca2d23b6
commit ed88989642
445 changed files with 50086 additions and 34342 deletions
--- a/DiscImageChef.DiscImages/GDI/Identify.cs
+++ b/DiscImageChef.DiscImages/GDI/Identify.cs
@@ -0,0 +1,110 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Identify.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Disk image plugins.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Identifies Dreamcast GDI disc 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 System.Text.RegularExpressions;
+using DiscImageChef.CommonTypes.Interfaces;
+using DiscImageChef.Console;
+
+namespace DiscImageChef.DiscImages
+{
+    public partial class Gdi
+    {
+                // Due to .gdi format, this method must parse whole file, ignoring errors (those will be thrown by OpenImage()).
+        public bool Identify(IFilter imageFilter)
+        {
+            try
+            {
+                imageFilter.GetDataForkStream().Seek(0, SeekOrigin.Begin);
+                byte[] testArray = new byte[512];
+                imageFilter.GetDataForkStream().Read(testArray, 0, 512);
+                imageFilter.GetDataForkStream().Seek(0, SeekOrigin.Begin);
+                // Check for unexpected control characters that shouldn't be present in a text file and can crash this plugin
+                bool twoConsecutiveNulls = false;
+                for(int i = 0; i < 512; i++)
+                {
+                    if(i >= imageFilter.GetDataForkStream().Length) break;
+
+                    if(testArray[i] == 0)
+                    {
+                        if(twoConsecutiveNulls) return false;
+
+                        twoConsecutiveNulls = true;
+                    }
+                    else twoConsecutiveNulls = false;
+
+                    if(testArray[i] < 0x20 && testArray[i] != 0x0A && testArray[i] != 0x0D && testArray[i] != 0x00)
+                        return false;
+                }
+
+                gdiStream = new StreamReader(imageFilter.GetDataForkStream());
+                int lineNumber  = 0;
+                int tracksFound = 0;
+                int tracks      = 0;
+
+                while(gdiStream.Peek() >= 0)
+                {
+                    lineNumber++;
+                    string line = gdiStream.ReadLine();
+
+                    if(lineNumber == 1)
+                    {
+                        if(!int.TryParse(line, out tracks)) return false;
+                    }
+                    else
+                    {
+                        Regex regexTrack = new Regex(REGEX_TRACK);
+
+                        Match trackMatch = regexTrack.Match(line ?? throw new InvalidOperationException());
+
+                        if(!trackMatch.Success) return false;
+
+                        tracksFound++;
+                    }
+                }
+
+                if(tracks == 0) return false;
+
+                return tracks == tracksFound;
+            }
+            catch(Exception ex)
+            {
+                DicConsole.ErrorWriteLine("Exception trying to identify image file {0}", imageFilter.GetBasePath());
+                DicConsole.ErrorWriteLine("Exception: {0}",                              ex.Message);
+                DicConsole.ErrorWriteLine("Stack trace: {0}",                            ex.StackTrace);
+                return false;
+            }
+        }
+
+    }
+}