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104 lines
4.3 KiB
C#
104 lines
4.3 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Read.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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// Reads Anex86 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 © 2011-2020 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.IO;
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using Aaru.CommonTypes;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Console;
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using Aaru.Helpers;
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namespace Aaru.DiscImages
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{
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public sealed partial class Anex86
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{
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public bool Open(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 < Marshal.SizeOf<Anex86Header>())
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return false;
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byte[] hdrB = new byte[Marshal.SizeOf<Anex86Header>()];
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stream.Read(hdrB, 0, hdrB.Length);
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_fdihdr = Marshal.SpanToStructureLittleEndian<Anex86Header>(hdrB);
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_imageInfo.MediaType = Geometry.GetMediaType(((ushort)_fdihdr.cylinders, (byte)_fdihdr.heads,
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(ushort)_fdihdr.spt, (uint)_fdihdr.bps, MediaEncoding.MFM,
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false));
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if(_imageInfo.MediaType == MediaType.Unknown)
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_imageInfo.MediaType = MediaType.GENERIC_HDD;
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AaruConsole.DebugWriteLine("Anex86 plugin", "MediaType: {0}", _imageInfo.MediaType);
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_imageInfo.ImageSize = (ulong)_fdihdr.dskSize;
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_imageInfo.CreationTime = imageFilter.GetCreationTime();
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_imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
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_imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
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_imageInfo.Sectors = (ulong)(_fdihdr.cylinders * _fdihdr.heads * _fdihdr.spt);
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_imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
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_imageInfo.SectorSize = (uint)_fdihdr.bps;
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_imageInfo.Cylinders = (uint)_fdihdr.cylinders;
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_imageInfo.Heads = (uint)_fdihdr.heads;
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_imageInfo.SectorsPerTrack = (uint)_fdihdr.spt;
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_anexImageFilter = imageFilter;
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return true;
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}
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public byte[] ReadSector(ulong sectorAddress) => ReadSectors(sectorAddress, 1);
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public byte[] ReadSectors(ulong sectorAddress, uint length)
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{
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if(sectorAddress > _imageInfo.Sectors - 1)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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if(sectorAddress + length > _imageInfo.Sectors)
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throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
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byte[] buffer = new byte[length * _imageInfo.SectorSize];
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Stream stream = _anexImageFilter.GetDataForkStream();
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stream.Seek((long)((ulong)_fdihdr.hdrSize + (sectorAddress * _imageInfo.SectorSize)), SeekOrigin.Begin);
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stream.Read(buffer, 0, (int)(length * _imageInfo.SectorSize));
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return buffer;
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}
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}
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} |