mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
Refactor image classes and split them to smaller files.
This commit is contained in:
166
DiscImageChef.DiscImages/Parallels/Read.cs
Normal file
166
DiscImageChef.DiscImages/Parallels/Read.cs
Normal file
@@ -0,0 +1,166 @@
|
||||
// /***************************************************************************
|
||||
// The Disc Image Chef
|
||||
// ----------------------------------------------------------------------------
|
||||
//
|
||||
// Filename : Read.cs
|
||||
// Author(s) : Natalia Portillo <claunia@claunia.com>
|
||||
//
|
||||
// Component : Disk image plugins.
|
||||
//
|
||||
// --[ Description ] ----------------------------------------------------------
|
||||
//
|
||||
// Reads Parallels 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.Collections.Generic;
|
||||
using System.IO;
|
||||
using System.Linq;
|
||||
using System.Runtime.InteropServices;
|
||||
using DiscImageChef.CommonTypes;
|
||||
using DiscImageChef.CommonTypes.Enums;
|
||||
using DiscImageChef.CommonTypes.Interfaces;
|
||||
using DiscImageChef.Console;
|
||||
|
||||
namespace DiscImageChef.DiscImages
|
||||
{
|
||||
public partial class Parallels
|
||||
{
|
||||
public bool Open(IFilter imageFilter)
|
||||
{
|
||||
Stream stream = imageFilter.GetDataForkStream();
|
||||
stream.Seek(0, SeekOrigin.Begin);
|
||||
|
||||
if(stream.Length < 512) return false;
|
||||
|
||||
byte[] pHdrB = new byte[Marshal.SizeOf(pHdr)];
|
||||
stream.Read(pHdrB, 0, Marshal.SizeOf(pHdr));
|
||||
pHdr = new ParallelsHeader();
|
||||
IntPtr headerPtr = Marshal.AllocHGlobal(Marshal.SizeOf(pHdr));
|
||||
Marshal.Copy(pHdrB, 0, headerPtr, Marshal.SizeOf(pHdr));
|
||||
pHdr = (ParallelsHeader)Marshal.PtrToStructure(headerPtr, typeof(ParallelsHeader));
|
||||
Marshal.FreeHGlobal(headerPtr);
|
||||
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.magic = {0}",
|
||||
StringHandlers.CToString(pHdr.magic));
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.version = {0}", pHdr.version);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.heads = {0}", pHdr.heads);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.cylinders = {0}", pHdr.cylinders);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.cluster_size = {0}", pHdr.cluster_size);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.bat_entries = {0}", pHdr.bat_entries);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.sectors = {0}", pHdr.sectors);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.in_use = 0x{0:X8}", pHdr.in_use);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.data_off = {0}", pHdr.data_off);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.flags = {0}", pHdr.flags);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.ext_off = {0}", pHdr.ext_off);
|
||||
|
||||
extended = parallelsExtMagic.SequenceEqual(pHdr.magic);
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "pHdr.extended = {0}", extended);
|
||||
|
||||
DicConsole.DebugWriteLine("Parallels plugin", "Reading BAT");
|
||||
bat = new uint[pHdr.bat_entries];
|
||||
byte[] batB = new byte[pHdr.bat_entries * 4];
|
||||
stream.Read(batB, 0, batB.Length);
|
||||
for(int i = 0; i < bat.Length; i++) bat[i] = BitConverter.ToUInt32(batB, i * 4);
|
||||
|
||||
clusterBytes = pHdr.cluster_size * 512;
|
||||
if(pHdr.data_off > 0) dataOffset = pHdr.data_off * 512;
|
||||
else
|
||||
dataOffset =
|
||||
(stream.Position / clusterBytes + stream.Position % clusterBytes) * clusterBytes;
|
||||
|
||||
sectorCache = new Dictionary<ulong, byte[]>();
|
||||
|
||||
empty = (pHdr.flags & PARALLELS_EMPTY) == PARALLELS_EMPTY;
|
||||
|
||||
imageInfo.CreationTime = imageFilter.GetCreationTime();
|
||||
imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
|
||||
imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
|
||||
imageInfo.Sectors = pHdr.sectors;
|
||||
imageInfo.SectorSize = 512;
|
||||
imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
|
||||
imageInfo.MediaType = MediaType.GENERIC_HDD;
|
||||
imageInfo.ImageSize = pHdr.sectors * 512;
|
||||
imageInfo.Cylinders = pHdr.cylinders;
|
||||
imageInfo.Heads = pHdr.heads;
|
||||
imageInfo.SectorsPerTrack = (uint)(imageInfo.Sectors / imageInfo.Cylinders / imageInfo.Heads);
|
||||
imageStream = stream;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
public byte[] ReadSector(ulong sectorAddress)
|
||||
{
|
||||
if(sectorAddress > imageInfo.Sectors - 1)
|
||||
throw new ArgumentOutOfRangeException(nameof(sectorAddress),
|
||||
$"Sector address {sectorAddress} not found");
|
||||
|
||||
if(empty) return new byte[512];
|
||||
|
||||
if(sectorCache.TryGetValue(sectorAddress, out byte[] sector)) return sector;
|
||||
|
||||
ulong index = sectorAddress / pHdr.cluster_size;
|
||||
ulong secOff = sectorAddress % pHdr.cluster_size;
|
||||
|
||||
uint batOff = bat[index];
|
||||
ulong imageOff;
|
||||
|
||||
if(batOff == 0) return new byte[512];
|
||||
|
||||
if(extended) imageOff = batOff * clusterBytes;
|
||||
else imageOff = batOff * 512;
|
||||
|
||||
byte[] cluster = new byte[clusterBytes];
|
||||
imageStream.Seek((long)imageOff, SeekOrigin.Begin);
|
||||
imageStream.Read(cluster, 0, (int)clusterBytes);
|
||||
sector = new byte[512];
|
||||
Array.Copy(cluster, (int)(secOff * 512), sector, 0, 512);
|
||||
|
||||
if(sectorCache.Count > MAX_CACHED_SECTORS) sectorCache.Clear();
|
||||
|
||||
sectorCache.Add(sectorAddress, sector);
|
||||
|
||||
return sector;
|
||||
}
|
||||
|
||||
public byte[] ReadSectors(ulong sectorAddress, uint length)
|
||||
{
|
||||
if(sectorAddress > imageInfo.Sectors - 1)
|
||||
throw new ArgumentOutOfRangeException(nameof(sectorAddress),
|
||||
$"Sector address {sectorAddress} not found");
|
||||
|
||||
if(sectorAddress + length > imageInfo.Sectors)
|
||||
throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
|
||||
|
||||
if(empty) return new byte[512 * length];
|
||||
|
||||
MemoryStream ms = new MemoryStream();
|
||||
|
||||
for(uint i = 0; i < length; i++)
|
||||
{
|
||||
byte[] sector = ReadSector(sectorAddress + i);
|
||||
ms.Write(sector, 0, sector.Length);
|
||||
}
|
||||
|
||||
return ms.ToArray();
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user