Changeset 2155 for trunk/eraser/Eraser.Util/ExtensionMethods/IO.cs

Timestamp:

6/13/2010 12:29:44 AM (2 years ago)

Author:

lowjoel

Message:

Implements #273: Use NtSetInformationFile? to deeply set file times.

File:

• trunk/eraser/Eraser.Util/ExtensionMethods/IO.cs (modified) (1 diff)

trunk/eraser/Eraser.Util/ExtensionMethods/IO.cs

@@ -50 +50 @@
 
         /// <summary>
+        /// Deeply sets the file times associated with the current
+        /// <see cref="FileInfo"/> object.
+        /// </summary>
+        /// <param name="updateTime">The time the basic information was last set.</param>
+        /// <param name="createdTime">The time the file was created.</param>
+        /// <param name="lastModifiedTime">The time the file was last modified.</param>
+        /// <param name="lastAccessedTime">The time the file was last accessed.</param>
+        public static void SetTimes(this FileSystemInfo info, DateTime updateTime,
+            DateTime createdTime, DateTime lastModifiedTime, DateTime lastAccessedTime)
+        {
+            FileInfo file = info as FileInfo;
+            DirectoryInfo directory = info as DirectoryInfo;
+
+            if (file != null)
+                file.SetTimes(updateTime, createdTime, lastModifiedTime, lastAccessedTime);
+            else if (directory != null)
+                directory.SetTimes(updateTime, createdTime, lastModifiedTime, lastAccessedTime);
+            else
+                throw new NotImplementedException();
+        }
+
+        /// <summary>
+        /// Deeply sets the file times associated with the current
+        /// <see cref="FileInfo"/> object.
+        /// </summary>
+        /// <param name="updateTime">The time the basic information was last set.</param>
+        /// <param name="createdTime">The time the file was created.</param>
+        /// <param name="lastModifiedTime">The time the file was last modified.</param>
+        /// <param name="lastAccessedTime">The time the file was last accessed.</param>
+        public static void SetTimes(this FileInfo info, DateTime updateTime,
+            DateTime createdTime, DateTime lastModifiedTime, DateTime lastAccessedTime)
+        {
+            using (SafeFileHandle streamHandle = new StreamInfo(info.FullName).
+                OpenHandle(FileMode.Open, NativeMethods.FILE_WRITE_ATTRIBUTES,
+                    FileShare.ReadWrite, FileOptions.None))
+            {
+                SetTimes(streamHandle, updateTime, createdTime, lastModifiedTime, lastAccessedTime);
+            }
+        }
+
+        /// <summary>
+        /// Deeply sets the file times associated with the current
+        /// <see cref="DirectoryInfo"/> object.
+        /// </summary>
+        /// <param name="updateTime">The time the basic information was last set.</param>
+        /// <param name="createdTime">The time the file was created.</param>
+        /// <param name="lastModifiedTime">The time the file was last modified.</param>
+        /// <param name="lastAccessedTime">The time the file was last accessed.</param>
+        public static void SetTimes(this DirectoryInfo info, DateTime updateTime,
+            DateTime createdTime, DateTime lastModifiedTime, DateTime lastAccessedTime)
+        {
+            using (SafeFileHandle streamHandle = new StreamInfo(info.FullName).
+                OpenHandle(FileMode.Open, NativeMethods.FILE_WRITE_ATTRIBUTES,
+                    FileShare.ReadWrite, (FileOptions)NativeMethods.FILE_FLAG_BACKUP_SEMANTICS))
+            {
+                SetTimes(streamHandle, updateTime, createdTime, lastModifiedTime, lastAccessedTime);
+            }
+        }
+
+        internal static void SetTimes(SafeFileHandle handle, DateTime updateTime,
+            DateTime createdTime, DateTime lastModifiedTime, DateTime lastAccessedTime)
+        {
+            NativeMethods.FILE_BASIC_INFORMATION fileInfo =
+                new NativeMethods.FILE_BASIC_INFORMATION();
+            fileInfo.ChangeTime = updateTime.ToFileTime();
+            fileInfo.CreationTime = createdTime.ToFileTime();
+            fileInfo.LastAccessTime = lastAccessedTime.ToFileTime();
+            fileInfo.LastWriteTime = lastModifiedTime.ToFileTime();
+
+            if (fileInfo.ChangeTime == 0)
+                throw new ArgumentOutOfRangeException("updateTime");
+            if (fileInfo.CreationTime == 0)
+                throw new ArgumentOutOfRangeException("createdTime");
+            if (fileInfo.LastAccessTime == 0)
+                throw new ArgumentOutOfRangeException("lastAccessedTime");
+            if (fileInfo.LastWriteTime == 0)
+                throw new ArgumentOutOfRangeException("lastModifiedTime");
+
+            IntPtr fileInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(fileInfo));
+            try
+            {
+                Marshal.StructureToPtr(fileInfo, fileInfoPtr, true);
+                NativeMethods.IO_STATUS_BLOCK status;
+                uint result = NativeMethods.NtSetInformationFile(handle,
+                    out status, fileInfoPtr, (uint)Marshal.SizeOf(fileInfo),
+                    NativeMethods.FILE_INFORMATION_CLASS.FileBasicInformation);
+
+                if (result != 0)
+                    throw new IOException();
+            }
+            finally
+            {
+                Marshal.FreeHGlobal(fileInfoPtr);
+            }
+        }
+
+        /// <summary>
         /// Gets the parent directory of the current <see cref="System.IO.FileSystemInfo"/>
         /// object.