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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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124
DiscImageChef.DiscImages/DiskCopy42/Identify.cs Normal file
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// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : Identify.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Identifies Apple DiskCopy 4.2 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 Claunia.Encoding;
using DiscImageChef.CommonTypes.Interfaces;
using DiscImageChef.Console;
namespace DiscImageChef.DiscImages
{
public partial class DiskCopy42
{
public bool Identify(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
stream.Seek(0, SeekOrigin.Begin);
byte[] buffer = new byte[0x58];
byte[] pString = new byte[64];
stream.Read(buffer, 0, 0x58);
// Incorrect pascal string length, not DC42
if(buffer[0] > 63) return false;
Dc42Header tmpHeader = new Dc42Header();
Array.Copy(buffer, 0, pString, 0, 64);
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
tmpHeader.DiskName = StringHandlers.PascalToString(pString, Encoding.GetEncoding("macintosh"));
tmpHeader.DataSize = BigEndianBitConverter.ToUInt32(buffer, 0x40);
tmpHeader.TagSize = BigEndianBitConverter.ToUInt32(buffer, 0x44);
tmpHeader.DataChecksum = BigEndianBitConverter.ToUInt32(buffer, 0x48);
tmpHeader.TagChecksum = BigEndianBitConverter.ToUInt32(buffer, 0x4C);
tmpHeader.Format = buffer[0x50];
tmpHeader.FmtByte = buffer[0x51];
tmpHeader.Valid = buffer[0x52];
tmpHeader.Reserved = buffer[0x53];
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.diskName = \"{0}\"", tmpHeader.DiskName);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.dataSize = {0} bytes", tmpHeader.DataSize);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.tagSize = {0} bytes", tmpHeader.TagSize);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.dataChecksum = 0x{0:X8}", tmpHeader.DataChecksum);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.tagChecksum = 0x{0:X8}", tmpHeader.TagChecksum);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.format = 0x{0:X2}", tmpHeader.Format);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.fmtByte = 0x{0:X2}", tmpHeader.FmtByte);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.valid = {0}", tmpHeader.Valid);
DicConsole.DebugWriteLine("DC42 plugin", "tmp_header.reserved = {0}", tmpHeader.Reserved);
if(tmpHeader.Valid != 1 || tmpHeader.Reserved != 0) return false;
// Some versions seem to incorrectly create little endian fields
if(tmpHeader.DataSize + tmpHeader.TagSize + 0x54 != imageFilter.GetDataForkLength() &&
tmpHeader.Format != kSigmaFormatTwiggy)
{
tmpHeader.DataSize = BitConverter.ToUInt32(buffer, 0x40);
tmpHeader.TagSize = BitConverter.ToUInt32(buffer, 0x44);
tmpHeader.DataChecksum = BitConverter.ToUInt32(buffer, 0x48);
tmpHeader.TagChecksum = BitConverter.ToUInt32(buffer, 0x4C);
if(tmpHeader.DataSize + tmpHeader.TagSize + 0x54 != imageFilter.GetDataForkLength() &&
tmpHeader.Format != kSigmaFormatTwiggy) return false;
}
if(tmpHeader.Format != kSonyFormat400K && tmpHeader.Format != kSonyFormat800K &&
tmpHeader.Format != kSonyFormat720K && tmpHeader.Format != kSonyFormat1440K &&
tmpHeader.Format != kSonyFormat1680K && tmpHeader.Format != kSigmaFormatTwiggy &&
tmpHeader.Format != kNotStandardFormat)
{
DicConsole.DebugWriteLine("DC42 plugin", "Unknown tmp_header.format = 0x{0:X2} value",
tmpHeader.Format);
return false;
}
if(tmpHeader.FmtByte != kSonyFmtByte400K && tmpHeader.FmtByte != kSonyFmtByte800K &&
tmpHeader.FmtByte != kSonyFmtByte800KIncorrect && tmpHeader.FmtByte != kSonyFmtByteProDos &&
tmpHeader.FmtByte != kInvalidFmtByte && tmpHeader.FmtByte != kSigmaFmtByteTwiggy &&
tmpHeader.FmtByte != kFmtNotStandard && tmpHeader.FmtByte != kMacOSXFmtByte)
{
DicConsole.DebugWriteLine("DC42 plugin", "Unknown tmp_header.fmtByte = 0x{0:X2} value",
tmpHeader.FmtByte);
return false;
}
if(tmpHeader.FmtByte != kInvalidFmtByte) return true;
DicConsole.DebugWriteLine("DC42 plugin", "Image says it's unformatted");
return false;
}
}
}