DiscUtils: Fat: Fix an issue with no long path name support in the upstream library

DiscUtils/DiscUtils.Fat/FatFileSystemOptions.cs

@@ -0,0 +1,75 @@
+//
+// Copyright (c) 2008-2011, Kenneth Bell
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+namespace DiscUtils.Fat
+{
+    using System;
+    using System.Text;
+
+    /// <summary>
+    /// FAT file system options.
+    /// </summary>
+    public sealed class FatFileSystemOptions : DiscFileSystemOptions
+    {
+        private Encoding _encoding;
+
+        internal FatFileSystemOptions()
+        {
+            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
+            FileNameEncoding = Encoding.GetEncoding(437);
+        }
+
+        internal FatFileSystemOptions(FileSystemParameters parameters)
+        {
+            if (parameters != null && parameters.FileNameEncoding != null)
+            {
+                FileNameEncoding = parameters.FileNameEncoding;
+            }
+            else
+            {
+                Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
+                FileNameEncoding = Encoding.GetEncoding(437);
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the character encoding used for file names.
+        /// </summary>
+        public Encoding FileNameEncoding
+        {
+            get
+            {
+                return _encoding;
+            }
+
+            set
+            {
+                if (!value.IsSingleByte)
+                {
+                    throw new ArgumentException(value.EncodingName + " is not a single byte encoding");
+                }
+
+                _encoding = value;
+            }
+        }
+    }
+}