Initial commit - WPinternals 2.6

2026-06-21 06:31:02 +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.Partitions
+{
+    using System;
+
+    internal class BiosPartitionRecord : IComparable<BiosPartitionRecord>
+    {
+        private uint _lbaOffset;
+
+        private byte _status;
+        private ushort _startCylinder;
+        private byte _startHead;
+        private byte _startSector;
+        private byte _type;
+        private ushort _endCylinder;
+        private byte _endHead;
+        private byte _endSector;
+        private uint _lbaStart;
+        private uint _lbaLength;
+        private int _index;
+
+        public BiosPartitionRecord()
+        {
+        }
+
+        public BiosPartitionRecord(byte[] data, int offset, uint lbaOffset, int index)
+        {
+            _lbaOffset = lbaOffset;
+
+            _status = data[offset];
+            _startHead = data[offset + 1];
+            _startSector = (byte)(data[offset + 2] & 0x3F);
+            _startCylinder = (ushort)(data[offset + 3] | ((data[offset + 2] & 0xC0) << 2));
+            _type = data[offset + 4];
+            _endHead = data[offset + 5];
+            _endSector = (byte)(data[offset + 6] & 0x3F);
+            _endCylinder = (ushort)(data[offset + 7] | ((data[offset + 6] & 0xC0) << 2));
+            _lbaStart = Utilities.ToUInt32LittleEndian(data, offset + 8);
+            _lbaLength = Utilities.ToUInt32LittleEndian(data, offset + 12);
+            _index = index;
+        }
+
+        public bool IsValid
+        {
+            get
+            {
+                return _endHead != 0 || _endSector != 0 || _endCylinder != 0 || _lbaLength != 0;
+            }
+        }
+
+        public byte Status
+        {
+            get { return _status; }
+            set { _status = value; }
+        }
+
+        public ushort StartCylinder
+        {
+            get { return _startCylinder; }
+            set { _startCylinder = value; }
+        }
+
+        public byte StartHead
+        {
+            get { return _startHead; }
+            set { _startHead = value; }
+        }
+
+        public byte StartSector
+        {
+            get { return _startSector; }
+            set { _startSector = value; }
+        }
+
+        public byte PartitionType
+        {
+            get { return _type; }
+            set { _type = value; }
+        }
+
+        public string FriendlyPartitionType
+        {
+            get { return BiosPartitionTypes.ToString(_type); }
+        }
+
+        public ushort EndCylinder
+        {
+            get { return _endCylinder; }
+            set { _endCylinder = value; }
+        }
+
+        public byte EndHead
+        {
+            get { return _endHead; }
+            set { _endHead = value; }
+        }
+
+        public byte EndSector
+        {
+            get { return _endSector; }
+            set { _endSector = value; }
+        }
+
+        public uint LBAStart
+        {
+            get { return _lbaStart; }
+            set { _lbaStart = value; }
+        }
+
+        public uint LBALength
+        {
+            get { return _lbaLength; }
+            set { _lbaLength = value; }
+        }
+
+        public uint LBAStartAbsolute
+        {
+            get { return _lbaStart + _lbaOffset; }
+        }
+
+        public int Index
+        {
+            get { return _index; }
+        }
+
+        public int CompareTo(BiosPartitionRecord other)
+        {
+            return LBAStartAbsolute.CompareTo(other.LBAStartAbsolute);
+        }
+
+        internal void WriteTo(byte[] buffer, int offset)
+        {
+            buffer[offset] = _status;
+            buffer[offset + 1] = _startHead;
+            buffer[offset + 2] = (byte)((_startSector & 0x3F) | ((_startCylinder >> 2) & 0xC0));
+            buffer[offset + 3] = (byte)_startCylinder;
+            buffer[offset + 4] = _type;
+            buffer[offset + 5] = _endHead;
+            buffer[offset + 6] = (byte)((_endSector & 0x3F) | ((_endCylinder >> 2) & 0xC0));
+            buffer[offset + 7] = (byte)_endCylinder;
+            Utilities.WriteBytesLittleEndian((uint)_lbaStart, buffer, offset + 8);
+            Utilities.WriteBytesLittleEndian((uint)_lbaLength, buffer, offset + 12);
+        }
+    }
+}