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354 lines
10 KiB
C#
354 lines
10 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Write.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Disk image plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Writes Parallels disk images.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using Aaru.CommonTypes;
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using Aaru.CommonTypes.AaruMetadata;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Structs;
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using Aaru.Helpers;
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using Aaru.Logging;
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namespace Aaru.Images;
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public sealed partial class Parallels
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{
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#region IWritableImage Members
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// TODO: Support extended
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/// <inheritdoc />
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public bool Create(string path, MediaType mediaType, Dictionary<string, string> options, ulong sectors,
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uint negativeSectors, uint overflowSectors, uint sectorSize)
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{
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if(sectorSize != 512)
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{
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ErrorMessage = Localization.Unsupported_sector_size;
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return false;
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}
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if(negativeSectors != 0)
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{
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ErrorMessage = Localization.Negative_sectors_are_not_supported;
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return false;
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}
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if(overflowSectors != 0)
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{
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ErrorMessage = Localization.Overflow_sectors_are_not_supported;
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return false;
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}
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if(!SupportedMediaTypes.Contains(mediaType))
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{
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ErrorMessage = string.Format(Localization.Unsupported_media_format_0, mediaType);
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return false;
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}
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if(sectors * sectorSize / DEFAULT_CLUSTER_SIZE > uint.MaxValue)
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{
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ErrorMessage = Localization.Too_many_sectors_for_selected_cluster_size;
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return false;
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}
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_imageInfo = new ImageInfo
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{
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MediaType = mediaType,
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SectorSize = sectorSize,
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Sectors = sectors
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};
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try
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{
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_writingStream = new FileStream(path, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None);
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}
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catch(IOException ex)
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{
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ErrorMessage = string.Format(Localization.Could_not_create_new_image_file_exception_0, ex.Message);
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AaruLogging.Exception(ex, Localization.Could_not_create_new_image_file_exception_0, ex.Message);
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return false;
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}
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var batEntries = (uint)(sectors * sectorSize / DEFAULT_CLUSTER_SIZE);
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if(sectors * sectorSize % DEFAULT_CLUSTER_SIZE > 0) batEntries++;
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uint headerSectors = (uint)Marshal.SizeOf<Header>() + batEntries * 4;
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if((uint)Marshal.SizeOf<Header>() + batEntries % 4 > 0) headerSectors++;
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_pHdr = new Header
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{
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magic = _magic,
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version = PARALLELS_VERSION,
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sectors = sectors,
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in_use = PARALLELS_CLOSED,
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bat_entries = batEntries,
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data_off = headerSectors,
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cluster_size = DEFAULT_CLUSTER_SIZE / 512
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};
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_bat = new uint[batEntries];
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_currentWritingPosition = headerSectors * 512;
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IsWriting = true;
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ErrorMessage = null;
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return true;
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}
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/// <inheritdoc />
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public bool WriteMediaTag(byte[] data, MediaTagType tag)
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{
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ErrorMessage = Localization.Writing_media_tags_is_not_supported;
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return false;
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}
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/// <inheritdoc />
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public bool WriteSector(byte[] data, ulong sectorAddress, bool negative, SectorStatus sectorStatus)
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{
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if(!IsWriting)
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{
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ErrorMessage = Localization.Tried_to_write_on_a_non_writable_image;
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return false;
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}
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if(negative)
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{
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ErrorMessage = Localization.Unsupported_feature;
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return false;
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}
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if(data.Length != 512)
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{
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ErrorMessage = Localization.Incorrect_data_size;
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return false;
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}
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if(sectorAddress >= _imageInfo.Sectors)
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{
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ErrorMessage = Localization.Tried_to_write_past_image_size;
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return false;
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}
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// Ignore empty sectors
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if(ArrayHelpers.ArrayIsNullOrEmpty(data)) return true;
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ulong index = sectorAddress / _pHdr.cluster_size;
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ulong secOff = sectorAddress % _pHdr.cluster_size;
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uint batOff = _bat[index];
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if(batOff == 0)
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{
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batOff = (uint)(_currentWritingPosition / 512);
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_bat[index] = batOff;
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_currentWritingPosition += _pHdr.cluster_size * 512L;
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}
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ulong imageOff = batOff * 512UL;
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_writingStream.Seek((long)imageOff, SeekOrigin.Begin);
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_writingStream.Seek((long)secOff * 512, SeekOrigin.Current);
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_writingStream.Write(data, 0, data.Length);
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ErrorMessage = "";
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return true;
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}
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// TODO: This can be optimized
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/// <inheritdoc />
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public bool WriteSectors(byte[] data, ulong sectorAddress, bool negative, uint length, SectorStatus[] sectorStatus)
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{
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if(!IsWriting)
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{
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ErrorMessage = Localization.Tried_to_write_on_a_non_writable_image;
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return false;
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}
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if(negative)
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{
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ErrorMessage = Localization.Unsupported_feature;
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return false;
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}
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if(data.Length % 512 != 0)
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{
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ErrorMessage = Localization.Incorrect_data_size;
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return false;
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}
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if(sectorAddress + length > _imageInfo.Sectors)
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{
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ErrorMessage = Localization.Tried_to_write_past_image_size;
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return false;
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}
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// Ignore empty sectors
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if(ArrayHelpers.ArrayIsNullOrEmpty(data)) return true;
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for(uint i = 0; i < length; i++)
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{
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var tmp = new byte[512];
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Array.Copy(data, i * 512, tmp, 0, 512);
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if(!WriteSector(tmp, sectorAddress + i, false, sectorStatus[i])) return false;
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}
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ErrorMessage = "";
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return true;
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}
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/// <inheritdoc />
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public bool WriteSectorLong(byte[] data, ulong sectorAddress, bool negative, SectorStatus sectorStatus)
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{
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ErrorMessage = Localization.Writing_sectors_with_tags_is_not_supported;
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return false;
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}
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/// <inheritdoc />
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public bool WriteSectorsLong(byte[] data, ulong sectorAddress, bool negative, uint length,
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SectorStatus[] sectorStatus)
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{
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ErrorMessage = Localization.Writing_sectors_with_tags_is_not_supported;
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return false;
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}
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/// <inheritdoc />
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public bool Close()
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{
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if(!IsWriting)
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{
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ErrorMessage = Localization.Image_is_not_opened_for_writing;
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return false;
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}
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if(_pHdr.cylinders == 0)
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{
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_pHdr.cylinders = (uint)(_imageInfo.Sectors / 16 / 63);
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_pHdr.heads = 16;
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_imageInfo.SectorsPerTrack = 63;
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while(_pHdr.cylinders == 0)
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{
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_pHdr.heads--;
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if(_pHdr.heads == 0)
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{
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_imageInfo.SectorsPerTrack--;
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_pHdr.heads = 16;
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}
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_pHdr.cylinders = (uint)(_imageInfo.Sectors / _pHdr.heads / _imageInfo.SectorsPerTrack);
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if(_pHdr is { cylinders: 0, heads: 0 } && _imageInfo.SectorsPerTrack == 0) break;
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}
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}
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var hdr = new byte[Marshal.SizeOf<Header>()];
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nint hdrPtr = System.Runtime.InteropServices.Marshal.AllocHGlobal(Marshal.SizeOf<Header>());
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System.Runtime.InteropServices.Marshal.StructureToPtr(_pHdr, hdrPtr, true);
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System.Runtime.InteropServices.Marshal.Copy(hdrPtr, hdr, 0, hdr.Length);
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System.Runtime.InteropServices.Marshal.FreeHGlobal(hdrPtr);
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_writingStream.Seek(0, SeekOrigin.Begin);
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_writingStream.Write(hdr, 0, hdr.Length);
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for(long i = 0; i < _bat.LongLength; i++) _writingStream.Write(BitConverter.GetBytes(_bat[i]), 0, 4);
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_writingStream.Flush();
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_writingStream.Close();
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IsWriting = false;
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ErrorMessage = "";
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return true;
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}
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/// <inheritdoc />
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public bool SetImageInfo(ImageInfo imageInfo) => true;
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/// <inheritdoc />
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public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack)
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{
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_pHdr.cylinders = cylinders;
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_pHdr.heads = heads;
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return true;
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}
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/// <inheritdoc />
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public bool WriteSectorTag(byte[] data, ulong sectorAddress, bool negative, SectorTagType tag)
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{
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ErrorMessage = Localization.Writing_sectors_with_tags_is_not_supported;
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return false;
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}
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/// <inheritdoc />
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public bool WriteSectorsTag(byte[] data, ulong sectorAddress, bool negative, uint length, SectorTagType tag)
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{
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ErrorMessage = Localization.Writing_sectors_with_tags_is_not_supported;
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return false;
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}
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/// <inheritdoc />
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public bool SetDumpHardware(List<DumpHardware> dumpHardware) => false;
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/// <inheritdoc />
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public bool SetMetadata(Metadata metadata) => false;
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#endregion
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} |