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Refactor image classes and split them to smaller files.

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Natalia Portillo
2018-07-23 23:25:43 +01:00
parent 55ca2d23b6
commit ed88989642
445 changed files with 50086 additions and 34342 deletions
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223
DiscImageChef.DiscImages/DIM/Read.cs Normal file
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// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : Read.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Reads DIM disk images.
//
// --[ License ] --------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2018 Natalia Portillo
// ****************************************************************************/
using System;
using System.IO;
using System.Linq;
using System.Text;
using DiscImageChef.CommonTypes;
using DiscImageChef.CommonTypes.Enums;
using DiscImageChef.CommonTypes.Interfaces;
using DiscImageChef.Console;
namespace DiscImageChef.DiscImages
{
public partial class Dim
{
public bool Open(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
stream.Seek(0, SeekOrigin.Begin);
if(stream.Length < DATA_OFFSET) return false;
long diskSize = stream.Length - DATA_OFFSET;
comment = new byte[60];
hdrId = new byte[13];
stream.Seek(0, SeekOrigin.Begin);
dskType = (DiskType)stream.ReadByte();
stream.Seek(0xAB, SeekOrigin.Begin);
stream.Read(hdrId, 0, 13);
stream.Seek(0xC2, SeekOrigin.Begin);
stream.Read(comment, 0, 60);
if(!headerId.SequenceEqual(hdrId)) return false;
imageInfo.MediaType = MediaType.Unknown;
switch(dskType)
{
// 8 spt, 1024 bps
case DiskType.Hd2:
if(diskSize % (2 * 8 * 1024) != 0)
{
DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 8 * 1024));
return false;
}
if(diskSize / (2 * 8 * 1024) == 77) imageInfo.MediaType = MediaType.SHARP_525;
imageInfo.SectorSize = 1024;
break;
// 9 spt, 1024 bps
case DiskType.Hs2:
if(diskSize % (2 * 9 * 512) != 0)
{
DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 9 * 512));
return false;
}
if(diskSize / (2 * 9 * 512) == 80) imageInfo.MediaType = MediaType.SHARP_525_9;
imageInfo.SectorSize = 512;
break;
// 15 spt, 512 bps
case DiskType.Hc2:
if(diskSize % (2 * 15 * 512) != 0)
{
DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 15 * 512));
return false;
}
if(diskSize / (2 * 15 * 512) == 80) imageInfo.MediaType = MediaType.DOS_525_HD;
imageInfo.SectorSize = 512;
break;
// 9 spt, 1024 bps
case DiskType.Hde2:
if(diskSize % (2 * 9 * 512) != 0)
{
DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 9 * 512));
return false;
}
if(diskSize / (2 * 9 * 512) == 80) imageInfo.MediaType = MediaType.SHARP_35_9;
imageInfo.SectorSize = 512;
break;
// 18 spt, 512 bps
case DiskType.Hq2:
if(diskSize % (2 * 18 * 512) != 0)
{
DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 18 * 512));
return false;
}
if(diskSize / (2 * 18 * 512) == 80) imageInfo.MediaType = MediaType.DOS_35_HD;
imageInfo.SectorSize = 512;
break;
// 26 spt, 256 bps
case DiskType.N88:
if(diskSize % (2 * 26 * 256) == 0)
{
if(diskSize % (2 * 26 * 256) == 77) imageInfo.MediaType = MediaType.NEC_8_DD;
imageInfo.SectorSize = 256;
}
else if(diskSize % (2 * 26 * 128) == 0)
{
if(diskSize % (2 * 26 * 128) == 77) imageInfo.MediaType = MediaType.NEC_8_SD;
imageInfo.SectorSize = 256;
}
else
{
DicConsole.ErrorWriteLine("DIM shows unknown image with {0} tracks", diskSize / (2 * 26 * 256));
return false;
}
break;
default: return false;
}
DicConsole.VerboseWriteLine("DIM image contains a disk of type {0}", imageInfo.MediaType);
if(!string.IsNullOrEmpty(imageInfo.Comments))
DicConsole.VerboseWriteLine("DIM comments: {0}", imageInfo.Comments);
dimImageFilter = imageFilter;
imageInfo.ImageSize = (ulong)diskSize;
imageInfo.CreationTime = imageFilter.GetCreationTime();
imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
imageInfo.Sectors = imageInfo.ImageSize / imageInfo.SectorSize;
imageInfo.Comments = StringHandlers.CToString(comment, Encoding.GetEncoding(932));
imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
switch(imageInfo.MediaType)
{
case MediaType.SHARP_525:
imageInfo.Cylinders = 77;
imageInfo.Heads = 2;
imageInfo.SectorsPerTrack = 8;
break;
case MediaType.SHARP_525_9:
imageInfo.Cylinders = 80;
imageInfo.Heads = 2;
imageInfo.SectorsPerTrack = 9;
break;
case MediaType.DOS_525_HD:
imageInfo.Cylinders = 80;
imageInfo.Heads = 2;
imageInfo.SectorsPerTrack = 15;
break;
case MediaType.SHARP_35_9:
imageInfo.Cylinders = 80;
imageInfo.Heads = 2;
imageInfo.SectorsPerTrack = 9;
break;
case MediaType.DOS_35_HD:
imageInfo.Cylinders = 80;
imageInfo.Heads = 2;
imageInfo.SectorsPerTrack = 18;
break;
case MediaType.NEC_8_DD:
case MediaType.NEC_8_SD:
imageInfo.Cylinders = 77;
imageInfo.Heads = 2;
imageInfo.SectorsPerTrack = 26;
break;
}
return true;
}
public byte[] ReadSector(ulong sectorAddress)
{
return ReadSectors(sectorAddress, 1);
}
public byte[] ReadSectors(ulong sectorAddress, uint length)
{
if(sectorAddress > imageInfo.Sectors - 1)
throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
if(sectorAddress + length > imageInfo.Sectors)
throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
byte[] buffer = new byte[length * imageInfo.SectorSize];
Stream stream = dimImageFilter.GetDataForkStream();
stream.Seek((long)(DATA_OFFSET + sectorAddress * imageInfo.SectorSize), SeekOrigin.Begin);
stream.Read(buffer, 0, (int)(length * imageInfo.SectorSize));
return buffer;
}
}
}