Initial commit - WPinternals 2.6

2026-06-20 14:11:02 +10:00 · 2018-10-25 22:35:49 +02:00
commit 396ae57f05
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+//
+// 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.Ntfs
+{
+    using System;
+    using System.Collections.Generic;
+    using System.IO;
+
+    internal class NtfsStream
+    {
+        private File _file;
+        private NtfsAttribute _attr;
+
+        public NtfsStream(File file, NtfsAttribute attr)
+        {
+            _file = file;
+            _attr = attr;
+        }
+
+        public NtfsAttribute Attribute
+        {
+            get { return _attr; }
+        }
+
+        public AttributeType AttributeType
+        {
+            get { return _attr.Type; }
+        }
+
+        public string Name
+        {
+            get { return _attr.Name; }
+        }
+
+        /// <summary>
+        /// Gets the content of a stream.
+        /// </summary>
+        /// <typeparam name="T">The stream's content structure.</typeparam>
+        /// <returns>The content.</returns>
+        public T GetContent<T>()
+            where T : IByteArraySerializable, IDiagnosticTraceable, new()
+        {
+            byte[] buffer;
+            using (Stream s = Open(FileAccess.Read))
+            {
+                buffer = Utilities.ReadFully(s, (int)s.Length);
+            }
+
+            T value = new T();
+            value.ReadFrom(buffer, 0);
+            return value;
+        }
+        
+        /// <summary>
+        /// Sets the content of a stream.
+        /// </summary>
+        /// <typeparam name="T">The stream's content structure.</typeparam>
+        /// <param name="value">The new value for the stream.</param>
+        public void SetContent<T>(T value)
+            where T : IByteArraySerializable, IDiagnosticTraceable, new()
+        {
+            byte[] buffer = new byte[value.Size];
+            value.WriteTo(buffer, 0);
+            using (Stream s = Open(FileAccess.Write))
+            {
+                s.Write(buffer, 0, buffer.Length);
+                s.SetLength(buffer.Length);
+            }
+        }
+
+        public SparseStream Open(FileAccess access)
+        {
+            return _attr.Open(access);
+        }
+
+        internal Range<long, long>[] GetClusters()
+        {
+            return _attr.GetClusters();
+        }
+
+        internal StreamExtent[] GetAbsoluteExtents()
+        {
+            List<StreamExtent> result = new List<StreamExtent>();
+
+            long clusterSize = _file.Context.BiosParameterBlock.BytesPerCluster;
+            if (_attr.IsNonResident)
+            {
+                Range<long, long>[] clusters = _attr.GetClusters();
+                foreach (var clusterRange in clusters)
+                {
+                    result.Add(new StreamExtent(clusterRange.Offset * clusterSize, clusterRange.Count * clusterSize));
+                }
+            }
+            else
+            {
+                result.Add(new StreamExtent(_attr.OffsetToAbsolutePos(0), _attr.Length));
+            }
+
+            return result.ToArray();
+        }
+    }
+}