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78 lines
2.6 KiB
C#
78 lines
2.6 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Identify.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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// Identifies Basic Lisa Utility 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 © 2011-2023 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.IO;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Helpers;
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namespace Aaru.Images;
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[SuppressMessage("ReSharper", "UnusedType.Global")]
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public sealed partial class Blu
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{
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#region IWritableImage Members
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/// <inheritdoc />
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public bool Identify(IFilter imageFilter)
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{
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Stream stream = imageFilter.GetDataForkStream();
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stream.Seek(0, SeekOrigin.Begin);
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if(stream.Length < 0x200)
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return false;
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var header = new byte[0x17];
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stream.EnsureRead(header, 0, 0x17);
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var tmpHdr = new BluHeader
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{
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DeviceName = new byte[0x0D]
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};
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Array.Copy(header, 0, tmpHdr.DeviceName, 0, 0x0D);
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tmpHdr.DeviceType = BigEndianBitConverter.ToUInt32(header, 0x0C) & 0x00FFFFFF;
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tmpHdr.DeviceBlocks = BigEndianBitConverter.ToUInt32(header, 0x11) & 0x00FFFFFF;
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tmpHdr.BytesPerBlock = BigEndianBitConverter.ToUInt16(header, 0x15);
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for(var i = 0; i < 0xD; i++)
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{
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if(tmpHdr.DeviceName[i] < 0x20)
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return false;
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}
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return (tmpHdr.BytesPerBlock & 0xFE00) == 0x200;
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}
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#endregion
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} |