Initial commit - WPinternals 2.6

2026-06-20 06:10:15 +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.BootConfig
+{
+    using System;
+    using System.IO;
+
+    internal abstract class DeviceRecord
+    {
+        public int Type { get; set; }
+
+        public int Length { get; set; }
+
+        public abstract int Size { get; }
+
+        public static DeviceRecord Parse(byte[] data, int offset)
+        {
+            int type = Utilities.ToInt32LittleEndian(data, offset);
+            int length = Utilities.ToInt32LittleEndian(data, offset + 0x8);
+            if (offset + length > data.Length)
+            {
+                throw new InvalidDataException("Device record is truncated");
+            }
+
+            DeviceRecord newRecord = null;
+            switch (type)
+            {
+                case 0:
+                    newRecord = new DeviceAndPathRecord();
+                    break;
+                case 5: // Logical 'boot' device
+                case 6: // Disk partition
+                    newRecord = new PartitionRecord();
+                    break;
+                case 8: // custom:nnnnnn
+                    break;
+                default:
+                    throw new NotImplementedException("Unknown device type: " + type);
+            }
+
+            if (newRecord != null)
+            {
+                newRecord.DoParse(data, offset);
+            }
+
+            return newRecord;
+        }
+
+        public abstract void GetBytes(byte[] data, int offset);
+
+        protected virtual void DoParse(byte[] data, int offset)
+        {
+            Type = Utilities.ToInt32LittleEndian(data, offset);
+            Length = Utilities.ToInt32LittleEndian(data, offset + 0x8);
+        }
+
+        protected void WriteHeader(byte[] data, int offset)
+        {
+            Length = Size;
+            Utilities.WriteBytesLittleEndian(Type, data, offset);
+            Utilities.WriteBytesLittleEndian(Size, data, offset + 0x8);
+        }
+    }
+}