mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
92 lines
3.5 KiB
C#
92 lines
3.5 KiB
C#
// /***************************************************************************
|
|
// Aaru Data Preservation Suite
|
|
// ----------------------------------------------------------------------------
|
|
//
|
|
// Filename : Identify.cs
|
|
// Author(s) : Natalia Portillo <claunia@claunia.com>
|
|
//
|
|
// Component : Disk image plugins.
|
|
//
|
|
// --[ Description ] ----------------------------------------------------------
|
|
//
|
|
// Identifies MaxiDisk 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 © 2011-2025 Natalia Portillo
|
|
// ****************************************************************************/
|
|
|
|
using System.IO;
|
|
using Aaru.CommonTypes.Interfaces;
|
|
using Aaru.Helpers;
|
|
using Aaru.Logging;
|
|
|
|
namespace Aaru.Images;
|
|
|
|
public sealed partial class MaxiDisk
|
|
{
|
|
#region IWritableImage Members
|
|
|
|
/// <inheritdoc />
|
|
public bool Identify(IFilter imageFilter)
|
|
{
|
|
Stream stream = imageFilter.GetDataForkStream();
|
|
|
|
if(stream.Length < 8) return false;
|
|
|
|
var buffer = new byte[8];
|
|
stream.Seek(0, SeekOrigin.Begin);
|
|
stream.EnsureRead(buffer, 0, buffer.Length);
|
|
|
|
Header tmpHeader = Marshal.ByteArrayToStructureLittleEndian<Header>(buffer);
|
|
|
|
AaruLogging.Debug(MODULE_NAME, "tmp_header.unknown = {0}", tmpHeader.unknown);
|
|
AaruLogging.Debug(MODULE_NAME, "tmp_header.diskType = {0}", tmpHeader.diskType);
|
|
AaruLogging.Debug(MODULE_NAME, "tmp_header.heads = {0}", tmpHeader.heads);
|
|
AaruLogging.Debug(MODULE_NAME, "tmp_header.cylinders = {0}", tmpHeader.cylinders);
|
|
AaruLogging.Debug(MODULE_NAME, "tmp_header.bytesPerSector = {0}", tmpHeader.bytesPerSector);
|
|
|
|
AaruLogging.Debug(MODULE_NAME, "tmp_header.sectorsPerTrack = {0}", tmpHeader.sectorsPerTrack);
|
|
|
|
AaruLogging.Debug(MODULE_NAME, "tmp_header.unknown2 = {0}", tmpHeader.unknown2);
|
|
AaruLogging.Debug(MODULE_NAME, "tmp_header.unknown3 = {0}", tmpHeader.unknown3);
|
|
|
|
// This is hardcoded
|
|
// But its possible values are unknown...
|
|
//if(tmp_header.diskType > 11)
|
|
// return false;
|
|
|
|
// Only floppies supported
|
|
if(tmpHeader.heads is 0 or > 2) return false;
|
|
|
|
// No floppies with more than this?
|
|
if(tmpHeader.cylinders > 90) return false;
|
|
|
|
// Maximum supported bps is 16384
|
|
if(tmpHeader.bytesPerSector > 7) return false;
|
|
|
|
int expectedFileSize = tmpHeader.heads *
|
|
tmpHeader.cylinders *
|
|
tmpHeader.sectorsPerTrack *
|
|
(128 << tmpHeader.bytesPerSector) +
|
|
8;
|
|
|
|
return expectedFileSize == stream.Length;
|
|
}
|
|
|
|
#endregion
|
|
} |