Initial commit - WPinternals 2.6

DiscUtils/DiscFileLocator.cs

@@ -0,0 +1,92 @@
+//
+// 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
+{
+    using System;
+    using System.IO;
+
+    internal sealed class DiscFileLocator : FileLocator
+    {
+        private DiscFileSystem _fileSystem;
+        private string _basePath;
+
+        public DiscFileLocator(DiscFileSystem fileSystem, string basePath)
+        {
+            _fileSystem = fileSystem;
+            _basePath = basePath;
+        }
+
+        public override bool Exists(string fileName)
+        {
+            return _fileSystem.FileExists(Utilities.CombinePaths(_basePath, fileName));
+        }
+
+        public override Stream Open(string fileName, FileMode mode, FileAccess access, FileShare share)
+        {
+            return _fileSystem.OpenFile(Utilities.CombinePaths(_basePath, fileName), mode, access);
+        }
+
+        public override FileLocator GetRelativeLocator(string path)
+        {
+            return new DiscFileLocator(_fileSystem, Utilities.CombinePaths(_basePath, path));
+        }
+
+        public override string GetFullPath(string path)
+        {
+            return Utilities.CombinePaths(_basePath, path);
+        }
+
+        public override string GetDirectoryFromPath(string path)
+        {
+            return Utilities.GetDirectoryFromPath(path);
+        }
+
+        public override string GetFileFromPath(string path)
+        {
+            return Utilities.GetFileFromPath(path);
+        }
+
+        public override DateTime GetLastWriteTimeUtc(string path)
+        {
+            return _fileSystem.GetLastWriteTimeUtc(Utilities.CombinePaths(_basePath, path));
+        }
+
+        public override bool HasCommonRoot(FileLocator other)
+        {
+            DiscFileLocator otherDiscLocator = other as DiscFileLocator;
+
+            if (otherDiscLocator == null)
+            {
+                return false;
+            }
+
+            // Common root if the same file system instance.
+            return Object.ReferenceEquals(otherDiscLocator._fileSystem, _fileSystem);
+        }
+
+        public override string ResolveRelativePath(string path)
+        {
+            return Utilities.ResolveRelativePath(_basePath, path);
+        }
+    }
+}