mirror of
https://github.com/aaru-dps/Aaru.Server.git
synced 2025-12-16 19:24:27 +00:00
Add writing support to 2IMG disk image.
This commit is contained in:
@@ -34,6 +34,7 @@ using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.IO;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Text;
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using DiscImageChef.CommonTypes;
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@@ -42,7 +43,7 @@ using DiscImageChef.Filters;
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namespace DiscImageChef.DiscImages
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{
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public class Apple2Mg : IMediaImage
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public class Apple2Mg : IWritableImage
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{
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/// <summary>
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/// Magic number, "2IMG"
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@@ -76,6 +77,10 @@ namespace DiscImageChef.DiscImages
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/// Disk image created by CiderPress, "CdrP"
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/// </summary>
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const uint CREATOR_CIDER = 0x50726443;
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/// <summary>
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/// Disk image created by DiscImageChef, "dic "
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/// </summary>
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const uint CREATOR_DIC = 0x20636964;
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const uint LOCKED_DISK = 0x80000000;
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const uint VALID_VOLUME_NUMBER = 0x00000100;
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@@ -88,6 +93,7 @@ namespace DiscImageChef.DiscImages
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byte[] decodedImage;
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A2ImgHeader imageHeader;
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ImageInfo imageInfo;
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FileStream writingStream;
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public Apple2Mg()
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{
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@@ -314,6 +320,9 @@ namespace DiscImageChef.DiscImages
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case CREATOR_CIDER:
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imageInfo.Application = "CiderPress";
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break;
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case CREATOR_DIC:
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imageInfo.Application = "DiscImageChef";
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break;
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default:
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imageInfo.Application = $"Unknown creator code \"{Encoding.ASCII.GetString(creator)}\"";
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break;
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@@ -378,8 +387,8 @@ namespace DiscImageChef.DiscImages
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imageInfo.SectorsPerTrack = 10;
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break;
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case MediaType.DOS_35_HD:
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imageInfo.Cylinders = 80;
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imageInfo.Heads = 2;
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imageInfo.Cylinders = 80;
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imageInfo.Heads = 2;
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imageInfo.SectorsPerTrack = 18;
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break;
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}
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@@ -511,6 +520,218 @@ namespace DiscImageChef.DiscImages
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return null;
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}
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public IEnumerable<MediaTagType> SupportedMediaTags => new MediaTagType[] { };
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public IEnumerable<SectorTagType> SupportedSectorTags => new SectorTagType[] { };
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public IEnumerable<MediaType> SupportedMediaTypes =>
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new[]
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{
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MediaType.Apple32SS, MediaType.Apple33SS, MediaType.AppleSonySS, MediaType.AppleSonyDS,
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MediaType.DOS_35_HD, MediaType.Unknown, MediaType.GENERIC_HDD
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};
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public IEnumerable<(string name, Type type, string description)> SupportedOptions =>
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new (string name, Type type, string description)[] { };
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public IEnumerable<string> KnownExtensions => new[] {".2mg"};
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public bool IsWriting { get; private set; }
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public string ErrorMessage { get; private set; }
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public bool Create(string path, MediaType mediaType, Dictionary<string, string> options, ulong sectors,
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uint sectorSize)
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{
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if(sectorSize != 512)
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if(sectorSize != 256 || mediaType != MediaType.Apple32SS && mediaType != MediaType.Apple33SS)
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{
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ErrorMessage = "Unsupported sector size";
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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 = $"Unsupport media format {mediaType}";
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return false;
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}
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if(sectors > uint.MaxValue)
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{
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ErrorMessage = "Too many sectors";
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return false;
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}
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imageInfo = new ImageInfo {MediaType = mediaType, SectorSize = sectorSize, Sectors = sectors};
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try { writingStream = new FileStream(path, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None); }
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catch(IOException e)
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{
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ErrorMessage = $"Could not create new image file, exception {e.Message}";
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return false;
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}
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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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public bool WriteMediaTag(byte[] data, MediaTagType tag)
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{
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ErrorMessage = "Unsupported feature";
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return false;
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}
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public bool WriteSector(byte[] data, ulong sectorAddress)
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{
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if(!IsWriting)
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{
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ErrorMessage = "Tried to write on a non-writable image";
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return false;
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}
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if(data.Length != imageInfo.SectorSize)
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{
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ErrorMessage = "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 = "Tried to write past image size";
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return false;
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}
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writingStream.Seek((long)(0x40 + sectorAddress * imageInfo.SectorSize), SeekOrigin.Begin);
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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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public bool WriteSectors(byte[] data, ulong sectorAddress, uint length)
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{
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if(!IsWriting)
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{
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ErrorMessage = "Tried to write on a non-writable image";
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return false;
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}
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if(data.Length % imageInfo.SectorSize != 0)
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{
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ErrorMessage = "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 = "Tried to write past image size";
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return false;
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}
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writingStream.Seek((long)(0x40 + sectorAddress * imageInfo.SectorSize), SeekOrigin.Begin);
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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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public bool WriteSectorLong(byte[] data, ulong sectorAddress)
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{
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ErrorMessage = "Writing sectors with tags is not supported.";
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return false;
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}
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public bool WriteSectorsLong(byte[] data, ulong sectorAddress, uint length)
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{
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ErrorMessage = "Writing sectors with tags is not supported.";
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return false;
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}
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public bool SetTracks(List<Track> tracks)
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{
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ErrorMessage = "Unsupported feature";
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return false;
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}
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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 = "Image is not opened for writing";
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return false;
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}
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writingStream.Seek(0x40 + 17 * 16 * 256, SeekOrigin.Begin);
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byte[] tmp = new byte[256];
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writingStream.Read(tmp, 0, tmp.Length);
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bool isDos = tmp[0x01] == 17 && tmp[0x02] < 16 && tmp[0x27] <= 122 && tmp[0x34] == 35 && tmp[0x35] == 16 &&
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tmp[0x36] == 0 && tmp[0x37] == 1;
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imageHeader = new A2ImgHeader
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{
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Blocks = (uint)(imageInfo.Sectors * imageInfo.SectorSize) / 512,
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Creator = CREATOR_DIC,
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DataOffset = 0x40,
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DataSize = (uint)(imageInfo.Sectors * imageInfo.SectorSize),
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Flags =
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(uint)(imageInfo.LastMediaSequence != 0
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? VALID_VOLUME_NUMBER + (imageInfo.MediaSequence & 0xFF)
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: 0),
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HeaderSize = 0x40,
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ImageFormat = isDos ? SectorOrder.Dos : SectorOrder.ProDos,
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Magic = MAGIC,
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Version = 1
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};
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if(!string.IsNullOrEmpty(imageInfo.Comments))
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{
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writingStream.Seek(0, SeekOrigin.End);
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tmp = Encoding.UTF8.GetBytes(imageInfo.Comments);
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imageHeader.CommentOffset = (uint)writingStream.Position;
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imageHeader.CommentSize = (uint)(tmp.Length + 1);
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writingStream.Write(tmp, 0, tmp.Length);
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writingStream.WriteByte(0);
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}
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byte[] hdr = new byte[Marshal.SizeOf(typeof(A2ImgHeader))];
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IntPtr hdrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(A2ImgHeader)));
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Marshal.StructureToPtr(imageHeader, hdrPtr, true);
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Marshal.Copy(hdrPtr, hdr, 0, hdr.Length);
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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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writingStream.Flush();
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writingStream.Close();
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ErrorMessage = "";
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IsWriting = false;
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return true;
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}
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public bool SetMetadata(ImageInfo metadata)
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{
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imageInfo.Comments = metadata.Comments;
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imageInfo.LastMediaSequence = metadata.LastMediaSequence;
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imageInfo.MediaSequence = metadata.MediaSequence;
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return true;
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}
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public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack)
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{
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// Geometry is not stored in image
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return true;
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}
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public bool WriteSectorTag(byte[] data, ulong sectorAddress, SectorTagType tag)
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{
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ErrorMessage = "Writing sectors with tags is not supported.";
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return false;
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}
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public bool WriteSectorsTag(byte[] data, ulong sectorAddress, uint length, SectorTagType tag)
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{
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ErrorMessage = "Writing sectors with tags is not supported.";
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return false;
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}
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MediaType GetMediaType()
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{
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switch(imageInfo.Sectors)
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