From 73b6c288a448b7e584f8199bb9d4c43cb78d0584 Mon Sep 17 00:00:00 2001
From: Tal Aloni <tal.aloni.il@gmail.com>
Date: Fri, 30 Nov 2018 14:38:05 +0200
Subject: [PATCH] Updated Utilities

---
 Utilities/IFileSystem/FileSystem.cs  | 29 ++++++++++++++++++++++++++++
 Utilities/IFileSystem/IFileSystem.cs |  9 +++++++++
 2 files changed, 38 insertions(+)

diff --git a/Utilities/IFileSystem/FileSystem.cs b/Utilities/IFileSystem/FileSystem.cs
index 1245005..897eddc 100644
--- a/Utilities/IFileSystem/FileSystem.cs
+++ b/Utilities/IFileSystem/FileSystem.cs
@@ -22,6 +22,17 @@ namespace Utilities
             return ListEntriesInDirectory(@"\");
         }
 
+        public virtual List<KeyValuePair<string, ulong>> ListDataStreams(string path)
+        {
+            FileSystemEntry entry = GetEntry(path);
+            List<KeyValuePair<string, ulong>> result = new List<KeyValuePair<string, ulong>>();
+            if (!entry.IsDirectory)
+            {
+                result.Add(new KeyValuePair<string, ulong>("::$DATA", entry.Size));
+            }
+            return result;
+        }
+
         public Stream OpenFile(string path, FileMode mode, FileAccess access, FileShare share)
         {
             return OpenFile(path, mode, access, share, FileOptions.None);
@@ -59,6 +70,24 @@ namespace Utilities
             destinationStream.Close();
         }
 
+        public virtual bool Exists(string path)
+        {
+            try
+            {
+                GetEntry(path);
+            }
+            catch (FileNotFoundException)
+            {
+                return false;
+            }
+            catch (DirectoryNotFoundException)
+            {
+                return false;
+            }
+
+            return true;
+        }
+
         public abstract string Name
         {
             get;
diff --git a/Utilities/IFileSystem/IFileSystem.cs b/Utilities/IFileSystem/IFileSystem.cs
index 9894ce8..a09a2e4 100644
--- a/Utilities/IFileSystem/IFileSystem.cs
+++ b/Utilities/IFileSystem/IFileSystem.cs
@@ -7,6 +7,8 @@ namespace Utilities
     public interface IFileSystem
     {
         /// <exception cref="System.ArgumentException"></exception>
+        /// <exception cref="System.IO.DirectoryNotFoundException"></exception>
+        /// <exception cref="System.IO.FileNotFoundException"></exception>
         /// <exception cref="System.IO.IOException"></exception>
         /// <exception cref="System.UnauthorizedAccessException"></exception>
         FileSystemEntry GetEntry(string path);
@@ -43,6 +45,13 @@ namespace Utilities
         /// <exception cref="System.UnauthorizedAccessException"></exception>
         List<FileSystemEntry> ListEntriesInDirectory(string path);
 
+        /// <exception cref="System.ArgumentException"></exception>
+        /// <exception cref="System.IO.DirectoryNotFoundException"></exception>
+        /// <exception cref="System.IO.FileNotFoundException"></exception>
+        /// <exception cref="System.IO.IOException"></exception>
+        /// <exception cref="System.UnauthorizedAccessException"></exception>
+        List<KeyValuePair<string, ulong>> ListDataStreams(string path);
+
         /// <exception cref="System.ArgumentException"></exception>
         /// <exception cref="System.IO.DirectoryNotFoundException"></exception>
         /// <exception cref="System.IO.FileNotFoundException"></exception>