aaru-dps/Aaru
1
0
Fork 0
mirror of https://github.com/aaru-dps/Aaru.git synced 2025-12-16 19:24:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Refactor image classes and split them to smaller files.

Browse Source
This commit is contained in:
Natalia Portillo
2018-07-23 23:25:43 +01:00
parent 55ca2d23b6
commit ed88989642
445 changed files with 50086 additions and 34342 deletions
Download Patch File Download Diff File Expand all files Collapse all files

88
DiscImageChef.DiscImages/MaxiDisk/Identify.cs Normal file
View File

@@ -0,0 +1,88 @@
// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// 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 © 2011-2018 Natalia Portillo
// ****************************************************************************/
using System;
using System.IO;
using System.Runtime.InteropServices;
using DiscImageChef.CommonTypes.Interfaces;
using DiscImageChef.Console;
namespace DiscImageChef.DiscImages
{
public partial class MaxiDisk
{
public bool Identify(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
if(stream.Length < 8) return false;
byte[] buffer = new byte[8];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(buffer, 0, buffer.Length);
IntPtr ftrPtr = Marshal.AllocHGlobal(buffer.Length);
Marshal.Copy(buffer, 0, ftrPtr, buffer.Length);
HdkHeader tmpHeader = (HdkHeader)Marshal.PtrToStructure(ftrPtr, typeof(HdkHeader));
Marshal.FreeHGlobal(ftrPtr);
DicConsole.DebugWriteLine("MAXI Disk plugin", "tmp_header.unknown = {0}", tmpHeader.unknown);
DicConsole.DebugWriteLine("MAXI Disk plugin", "tmp_header.diskType = {0}", tmpHeader.diskType);
DicConsole.DebugWriteLine("MAXI Disk plugin", "tmp_header.heads = {0}", tmpHeader.heads);
DicConsole.DebugWriteLine("MAXI Disk plugin", "tmp_header.cylinders = {0}", tmpHeader.cylinders);
DicConsole.DebugWriteLine("MAXI Disk plugin", "tmp_header.bytesPerSector = {0}", tmpHeader.bytesPerSector);
DicConsole.DebugWriteLine("MAXI Disk plugin", "tmp_header.sectorsPerTrack = {0}",
tmpHeader.sectorsPerTrack);
DicConsole.DebugWriteLine("MAXI Disk plugin", "tmp_header.unknown2 = {0}", tmpHeader.unknown2);
DicConsole.DebugWriteLine("MAXI Disk plugin", "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 == 0 || tmpHeader.heads > 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;
}
}
}