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Aaru/DiscImageChef.DiscImages/UDIF/Write.cs

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Refactor image classes and split them to smaller files.
2018-07-23 23:25:43 +01:00
// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : Write.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Writes Apple Universal Disk Image Format.
//
// --[ 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/>.
//
// ----------------------------------------------------------------------------
Update copyright year.
2018-12-29 17:34:38 +00:00
// Copyright © 2011-2019 Natalia Portillo
Refactor image classes and split them to smaller files.
2018-07-23 23:25:43 +01:00
// ****************************************************************************/
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Claunia.PropertyList;
using DiscImageChef.Checksums;
using DiscImageChef.CommonTypes;
using DiscImageChef.CommonTypes.Enums;
using DiscImageChef.CommonTypes.Structs;
using Schemas;
namespace DiscImageChef.DiscImages
{
public partial class Udif
{
public bool Create(string path, MediaType mediaType, Dictionary<string, string> options, ulong sectors,
uint sectorSize)
{
if(sectorSize != 512)
{
ErrorMessage = "Unsupported sector size";
return false;
}
if(!SupportedMediaTypes.Contains(mediaType))
{
ErrorMessage = $"Unsupport media format {mediaType}";
return false;
}
imageInfo = new ImageInfo {MediaType = mediaType, SectorSize = sectorSize, Sectors = sectors};
try { writingStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None); }
catch(IOException e)
{
ErrorMessage = $"Could not create new image file, exception {e.Message}";
return false;
}
chunks = new Dictionary<ulong, BlockChunk>();
currentChunk = new BlockChunk();
currentSector = 0;
dataForkChecksum = new Crc32Context();
masterChecksum = new Crc32Context();
IsWriting = true;
ErrorMessage = null;
return true;
}
public bool WriteMediaTag(byte[] data, MediaTagType tag)
{
ErrorMessage = "Writing media tags is not supported.";
return false;
}
public bool WriteSector(byte[] data, ulong sectorAddress)
{
if(!IsWriting)
{
ErrorMessage = "Tried to write on a non-writable image";
return false;
}
if(data.Length != imageInfo.SectorSize)
{
ErrorMessage = "Incorrect data size";
return false;
}
if(sectorAddress >= imageInfo.Sectors)
{
ErrorMessage = "Tried to write past image size";
return false;
}
if(sectorAddress < currentSector)
{
ErrorMessage = "Tried to rewind, this format rewinded on writing";
return false;
}
masterChecksum.Update(data);
bool isEmpty = ArrayHelpers.ArrayIsNullOrEmpty(data);
switch(currentChunk.type)
{
case CHUNK_TYPE_ZERO:
currentChunk.type = isEmpty ? CHUNK_TYPE_NOCOPY : CHUNK_TYPE_COPY;
break;
case CHUNK_TYPE_NOCOPY when !isEmpty:
case CHUNK_TYPE_COPY when isEmpty:
chunks.Add(currentChunk.sector, currentChunk);
currentChunk = new BlockChunk
{
type = isEmpty ? CHUNK_TYPE_NOCOPY : CHUNK_TYPE_COPY,
sector = currentSector,
offset = (ulong)(isEmpty ? 0 : writingStream.Position)
};
break;
}
currentChunk.sectors++;
currentChunk.length += (ulong)(isEmpty ? 0 : 512);
currentSector++;
if(!isEmpty)
{
dataForkChecksum.Update(data);
writingStream.Write(data, 0, data.Length);
}
ErrorMessage = "";
return true;
}
// TODO: This can be optimized
public bool WriteSectors(byte[] data, ulong sectorAddress, uint length)
{
if(!IsWriting)
{
ErrorMessage = "Tried to write on a non-writable image";
return false;
}
if(data.Length % imageInfo.SectorSize != 0)
{
ErrorMessage = "Incorrect data size";
return false;
}
if(sectorAddress + length > imageInfo.Sectors)
{
ErrorMessage = "Tried to write past image size";
return false;
}
// Ignore empty sectors
if(ArrayHelpers.ArrayIsNullOrEmpty(data))
{
if(currentChunk.type == CHUNK_TYPE_COPY)
{
chunks.Add(currentChunk.sector, currentChunk);
currentChunk = new BlockChunk {type = CHUNK_TYPE_NOCOPY, sector = currentSector};
}
currentChunk.sectors += (ulong)(data.Length / imageInfo.SectorSize);
currentSector += (ulong)(data.Length / imageInfo.SectorSize);
masterChecksum.Update(data);
ErrorMessage = "";
return true;
}
for(uint i = 0; i < length; i++)
{
byte[] tmp = new byte[imageInfo.SectorSize];
Array.Copy(data, i * imageInfo.SectorSize, tmp, 0, imageInfo.SectorSize);
if(!WriteSector(tmp, sectorAddress + i)) return false;
}
ErrorMessage = "";
return true;
}
public bool WriteSectorLong(byte[] data, ulong sectorAddress)
{
ErrorMessage = "Writing sectors with tags is not supported.";
return false;
}
public bool WriteSectorsLong(byte[] data, ulong sectorAddress, uint length)
{
ErrorMessage = "Writing sectors with tags is not supported.";
return false;
}
public bool SetTracks(List<Track> tracks)
{
ErrorMessage = "Unsupported feature";
return false;
}
public bool Close()
{
if(!IsWriting)
{
ErrorMessage = "Image is not opened for writing";
return false;
}
if(currentChunk.type != CHUNK_TYPE_NOCOPY) currentChunk.length = currentChunk.sectors * 512;
chunks.Add(currentChunk.sector, currentChunk);
chunks.Add(imageInfo.Sectors, new BlockChunk {type = CHUNK_TYPE_END, sector = imageInfo.Sectors});
BlockHeader bHdr = new BlockHeader
{
signature = CHUNK_SIGNATURE,
version = 1,
sectorCount = imageInfo.Sectors,
checksumType = UDIF_CHECKSUM_TYPE_CRC32,
checksumLen = 32,
checksum = BitConverter.ToUInt32(dataForkChecksum.Final().Reverse().ToArray(), 0),
chunks = (uint)chunks.Count
};
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
MemoryStream chunkMs = new MemoryStream();
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.signature), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.version), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.sectorStart), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.sectorCount), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.dataOffset), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.buffers), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.descriptor), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved1), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved2), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved3), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved4), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved5), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved6), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.checksumType), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.checksumLen), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.checksum), 0, 4);
chunkMs.Write(new byte[124], 0, 124);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.chunks), 0, 4);
foreach(BlockChunk chunk in chunks.Values)
{
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.type), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.comment), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.sector), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.sectors), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.offset), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.length), 0, 8);
}
byte[] plist = Encoding.UTF8.GetBytes(new NSDictionary
{
{
"resource-fork",
new NSDictionary
{
{
"blkx",
new NSArray
{
new NSDictionary
{
{"Attributes", "0x0050"},
{"CFName", "whole disk (DiscImageChef : 0)"},
{"Data", chunkMs.ToArray()},
{"ID", "0"},
{"Name", "whole disk (DiscImageChef : 0)"}
}
}
}
}
}
}.ToXmlPropertyList());
footer = new UdifFooter
{
signature = UDIF_SIGNATURE,
version = 4,
headerSize = 512,
flags = 1,
dataForkLen = (ulong)writingStream.Length,
segmentNumber = 1,
segmentCount = 1,
segmentId = Guid.NewGuid(),
dataForkChkType = UDIF_CHECKSUM_TYPE_CRC32,
dataForkChkLen = 32,
dataForkChk = BitConverter.ToUInt32(dataForkChecksum.Final().Reverse().ToArray(), 0),
plistOff = (ulong)writingStream.Length,
plistLen = (ulong)plist.Length,
// TODO: Find how is this calculated
/*masterChkType = 2,
masterChkLen = 32,
masterChk = BitConverter.ToUInt32(masterChecksum.Final().Reverse().ToArray(), 0),*/
imageVariant = 2,
sectorCount = imageInfo.Sectors
};
writingStream.Seek(0, SeekOrigin.End);
writingStream.Write(plist, 0, plist.Length);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.signature), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.version), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.headerSize), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.flags), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.runningDataForkOff), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkOff), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkLen), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.rsrcForkOff), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.rsrcForkLen), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.segmentNumber), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.segmentCount), 0, 4);
writingStream.Write(footer.segmentId.ToByteArray(), 0, 16);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkChkType), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkChkLen), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkChk), 0, 4);
writingStream.Write(new byte[124], 0, 124);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.plistOff), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.plistLen), 0, 8);
writingStream.Write(new byte[120], 0, 120);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.masterChkType), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.masterChkLen), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.masterChk), 0, 4);
writingStream.Write(new byte[124], 0, 124);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.imageVariant), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.sectorCount), 0, 8);
writingStream.Write(new byte[12], 0, 12);
writingStream.Flush();
writingStream.Close();
IsWriting = false;
ErrorMessage = "";
return true;
}
// TODO: Comments
public bool SetMetadata(ImageInfo metadata)
{
return true;
}
public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack)
{
// Not stored in image
return true;
}
public bool WriteSectorTag(byte[] data, ulong sectorAddress, SectorTagType tag)
{
ErrorMessage = "Writing sectors with tags is not supported.";
return false;
}
public bool WriteSectorsTag(byte[] data, ulong sectorAddress, uint length, SectorTagType tag)
{
ErrorMessage = "Writing sectors with tags is not supported.";
return false;
}
public bool SetDumpHardware(List<DumpHardwareType> dumpHardware)
{
// Not supported
return false;
}
public bool SetCicmMetadata(CICMMetadataType metadata)
{
// Not supported
return false;
}
}
}
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