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58 lines
2.1 KiB
C#
58 lines
2.1 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Helpers.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Disk image plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Contains helpers for Microsoft Hyper-V disk images.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2019 Natalia Portillo
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// ****************************************************************************/
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using System.Collections.Generic;
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using System.Linq;
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namespace DiscImageChef.DiscImages
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{
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public partial class Vhdx
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{
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bool CheckBitmap(ulong sectorAddress)
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{
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long index = (long)(sectorAddress / 8);
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int shift = (int)(sectorAddress % 8);
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byte val = (byte)(1 << shift);
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if(index > sectorBitmap.LongLength) return false;
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return (sectorBitmap[index] & val) == val;
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}
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static uint VhdxChecksum(IEnumerable<byte> data)
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{
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uint checksum = data.Aggregate<byte, uint>(0, (current, b) => current + b);
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return ~checksum;
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}
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}
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} |