From 7a8e997948cc0104efa3f81416b714594833c6ad Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Sat, 27 Apr 2019 02:46:29 +0100
Subject: [PATCH] Implement DOS and NT namespaces in FAT.

---
 DiscImageChef.Filesystems/FAT/Consts.cs |  6 ++++++
 DiscImageChef.Filesystems/FAT/Dir.cs    | 11 ++++++----
 DiscImageChef.Filesystems/FAT/FAT.cs    |  7 ++++++-
 DiscImageChef.Filesystems/FAT/Super.cs  | 28 +++++++++++++++++++++----
 4 files changed, 43 insertions(+), 9 deletions(-)

diff --git a/DiscImageChef.Filesystems/FAT/Consts.cs b/DiscImageChef.Filesystems/FAT/Consts.cs
index 342055519..a21cd0270 100644
--- a/DiscImageChef.Filesystems/FAT/Consts.cs
+++ b/DiscImageChef.Filesystems/FAT/Consts.cs
@@ -205,5 +205,11 @@ namespace DiscImageChef.Filesystems.FAT
             DecRainbow,
             Human
         }
+
+        enum Namespace
+        {
+            Dos,
+            Nt
+        }
     }
 }
\ No newline at end of file
diff --git a/DiscImageChef.Filesystems/FAT/Dir.cs b/DiscImageChef.Filesystems/FAT/Dir.cs
index 815f9b8ba..c035ce472 100644
--- a/DiscImageChef.Filesystems/FAT/Dir.cs
+++ b/DiscImageChef.Filesystems/FAT/Dir.cs
@@ -154,11 +154,14 @@ namespace DiscImageChef.Filesystems.FAT
                     string name      = Encoding.GetString(dirent.filename).TrimEnd();
                     string extension = Encoding.GetString(dirent.extension).TrimEnd();
 
-                    if((dirent.caseinfo & FASTFAT_LOWERCASE_EXTENSION) > 0)
-                        extension = extension.ToLower(CultureInfo.CurrentCulture);
+                    if(@namespace == Namespace.Nt)
+                    {
+                        if((dirent.caseinfo & FASTFAT_LOWERCASE_EXTENSION) > 0)
+                            extension = extension.ToLower(CultureInfo.CurrentCulture);
 
-                    if((dirent.caseinfo & FASTFAT_LOWERCASE_BASENAME) > 0)
-                        name = name.ToLower(CultureInfo.CurrentCulture);
+                        if((dirent.caseinfo & FASTFAT_LOWERCASE_BASENAME) > 0)
+                            name = name.ToLower(CultureInfo.CurrentCulture);
+                    }
 
                     if(extension != "") filename = name + "." + extension;
                     else filename                = name;
diff --git a/DiscImageChef.Filesystems/FAT/FAT.cs b/DiscImageChef.Filesystems/FAT/FAT.cs
index 7898831c1..301d1f356 100644
--- a/DiscImageChef.Filesystems/FAT/FAT.cs
+++ b/DiscImageChef.Filesystems/FAT/FAT.cs
@@ -55,6 +55,7 @@ namespace DiscImageChef.Filesystems.FAT
         ulong                                                  fatFirstSector;
         ulong                                                  firstClusterSector;
         bool                                                   mounted;
+        Namespace                                              @namespace;
         uint                                                   reservedSectors;
         Dictionary<string, DirectoryEntry>                     rootDirectoryCache;
         uint                                                   sectorsPerCluster;
@@ -72,7 +73,11 @@ namespace DiscImageChef.Filesystems.FAT
         public IEnumerable<(string name, Type type, string description)> SupportedOptions =>
             new (string name, Type type, string description)[] { };
 
-        public Dictionary<string, string> Namespaces => null;
+        public Dictionary<string, string> Namespaces =>
+            new Dictionary<string, string>
+            {
+                {"dos", "DOS (8.3 all uppercase)"}, {"nt", "Windows NT (8.3 mixed case, default)"}
+            };
 
         static Dictionary<string, string> GetDefaultOptions() =>
             new Dictionary<string, string> {{"debug", false.ToString()}};
diff --git a/DiscImageChef.Filesystems/FAT/Super.cs b/DiscImageChef.Filesystems/FAT/Super.cs
index 143bd4ada..797f69508 100644
--- a/DiscImageChef.Filesystems/FAT/Super.cs
+++ b/DiscImageChef.Filesystems/FAT/Super.cs
@@ -65,6 +65,20 @@ namespace DiscImageChef.Filesystems.FAT
             if(options == null) options = GetDefaultOptions();
             if(options.TryGetValue("debug", out string debugString)) bool.TryParse(debugString, out debug);
 
+            // Default namespace
+            if(@namespace is null) @namespace = "nt";
+
+            switch(@namespace.ToLowerInvariant())
+            {
+                case "dos":
+                    this.@namespace = Namespace.Dos;
+                    break;
+                case "nt":
+                    this.@namespace = Namespace.Nt;
+                    break;
+                default: return Errno.InvalidArgument;
+            }
+
             if(imagePlugin.Info.SectorSize < 512) return Errno.InvalidArgument;
 
             DicConsole.DebugWriteLine("FAT plugin", "Reading BPB");
@@ -414,7 +428,9 @@ namespace DiscImageChef.Filesystems.FAT
                     Array.Copy(entry.extension, 0, fullname, 8, 3);
                     string volname = Encoding.GetString(fullname).Trim();
                     if(!string.IsNullOrEmpty(volname))
-                        XmlFsType.VolumeName = (entry.caseinfo & 0x18) > 0 ? volname.ToLower() : volname;
+                        XmlFsType.VolumeName = (entry.caseinfo & 0x18) > 0 && this.@namespace == Namespace.Nt
+                                                   ? volname.ToLower()
+                                                   : volname;
 
                     if(entry.ctime > 0 && entry.cdate > 0)
                     {
@@ -438,10 +454,14 @@ namespace DiscImageChef.Filesystems.FAT
                 string name      = Encoding.GetString(entry.filename).TrimEnd();
                 string extension = Encoding.GetString(entry.extension).TrimEnd();
 
-                if((entry.caseinfo & FASTFAT_LOWERCASE_EXTENSION) > 0)
-                    extension = extension.ToLower(CultureInfo.CurrentCulture);
+                if(this.@namespace == Namespace.Nt)
+                {
+                    if((entry.caseinfo & FASTFAT_LOWERCASE_EXTENSION) > 0)
+                        extension = extension.ToLower(CultureInfo.CurrentCulture);
 
-                if((entry.caseinfo & FASTFAT_LOWERCASE_BASENAME) > 0) name = name.ToLower(CultureInfo.CurrentCulture);
+                    if((entry.caseinfo & FASTFAT_LOWERCASE_BASENAME) > 0)
+                        name = name.ToLower(CultureInfo.CurrentCulture);
+                }
 
                 if(extension != "") filename = name + "." + extension;
                 else filename                = name;