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Support writing logically block addressable tapes in dicformat.

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This commit is contained in:
Natalia Portillo
2019-05-01 22:51:30 +01:00
parent 9ec6787175
commit 9dd03546a1
6 changed files with 216 additions and 15 deletions
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101
DiscImageChef.DiscImages/DiscImageChef/Write.cs
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@@ -688,7 +688,11 @@ namespace DiscImageChef.DiscImages
inMemoryDdt = sectors <= maxDdtSize * 1024 * 1024 / sizeof(ulong);
// If in memory, easy
if(inMemoryDdt) userDataDdt = new ulong[sectors];
if(inMemoryDdt)
{
if(isTape) tapeDdt = new Dictionary<ulong, ulong>();
else userDataDdt = new ulong[sectors];
}
// If not, create the block, add to index, and enlarge the file to allow the DDT to exist on-disk
else
{
@@ -798,7 +802,7 @@ namespace DiscImageChef.DiscImages
return false;
}
if(sectorAddress >= Info.Sectors)
if(sectorAddress >= Info.Sectors && !isTape)
{
ErrorMessage = "Tried to write past image size";
return false;
@@ -1854,6 +1858,96 @@ namespace DiscImageChef.DiscImages
}
}
if(isTape)
{
ulong latestBlock = tapeDdt.Max(b => b.Key);
userDataDdt = new ulong[latestBlock + 1];
foreach(KeyValuePair<ulong, ulong> block in tapeDdt) userDataDdt[block.Key] = block.Value;
inMemoryDdt = true;
tapeDdt.Clear();
idxEntry = new IndexEntry
{
blockType = BlockType.TapePartitionBlock,
dataType = DataType.UserData,
offset = (ulong)imageStream.Position
};
DicConsole.DebugWriteLine("DiscImageChef format plugin", "Writing tape partitions to position {0}",
idxEntry.offset);
TapePartitionEntry[] tapePartitionEntries = new TapePartitionEntry[TapePartitions.Count];
for(int t = 0; t < TapePartitions.Count; t++)
{
tapePartitionEntries[t] = new TapePartitionEntry();
tapePartitionEntries[t].Number = TapePartitions[t].Number;
tapePartitionEntries[t].FirstBlock = TapePartitions[t].FirstBlock;
tapePartitionEntries[t].LastBlock = TapePartitions[t].LastBlock;
}
byte[] tapePartitionEntriesData =
MemoryMarshal.Cast<TapePartitionEntry, byte>(tapePartitionEntries).ToArray();
TapePartitionHeader tapePartitionHeader = new TapePartitionHeader();
tapePartitionHeader.identifier = BlockType.TapePartitionBlock;
tapePartitionHeader.entries = (byte)tapePartitionEntries.Length;
tapePartitionHeader.length = (ulong)tapePartitionEntriesData.Length;
crc64 = new Crc64Context();
crc64.Update(tapePartitionEntriesData);
tapePartitionHeader.crc64 = BitConverter.ToUInt64(crc64.Final(), 0);
structureBytes = new byte[Marshal.SizeOf<TapePartitionHeader>()];
MemoryMarshal.Write(structureBytes, ref tapePartitionHeader);
imageStream.Write(structureBytes, 0, structureBytes.Length);
structureBytes = null;
imageStream.Write(tapePartitionEntriesData, 0, tapePartitionEntriesData.Length);
index.RemoveAll(t => t.blockType == BlockType.TapePartitionBlock && t.dataType == DataType.UserData);
index.Add(idxEntry);
idxEntry = new IndexEntry
{
blockType = BlockType.TapeFileBlock,
dataType = DataType.UserData,
offset = (ulong)imageStream.Position
};
DicConsole.DebugWriteLine("DiscImageChef format plugin", "Writing tape files to position {0}",
idxEntry.offset);
TapeFileEntry[] tapeFileEntries = new TapeFileEntry[Files.Count];
for(int t = 0; t < Files.Count; t++)
tapeFileEntries[t] = new TapeFileEntry
{
File = Files[t].File, FirstBlock = Files[t].FirstBlock, LastBlock = Files[t].LastBlock
};
byte[] tapeFileEntriesData = MemoryMarshal.Cast<TapeFileEntry, byte>(tapeFileEntries).ToArray();
TapeFileHeader tapeFileHeader = new TapeFileHeader
{
identifier = BlockType.TapeFileBlock,
entries = (uint)tapeFileEntries.Length,
length = (ulong)tapeFileEntriesData.Length
};
crc64 = new Crc64Context();
crc64.Update(tapeFileEntriesData);
tapeFileHeader.crc64 = BitConverter.ToUInt64(crc64.Final(), 0);
structureBytes = new byte[Marshal.SizeOf<TapeFileHeader>()];
MemoryMarshal.Write(structureBytes, ref tapeFileHeader);
imageStream.Write(structureBytes, 0, structureBytes.Length);
structureBytes = null;
imageStream.Write(tapeFileEntriesData, 0, tapeFileEntriesData.Length);
index.RemoveAll(t => t.blockType == BlockType.TapeFileBlock && t.dataType == DataType.UserData);
index.Add(idxEntry);
}
// If the DDT is in-memory, write it to disk
if(inMemoryDdt)
{
@@ -2949,11 +3043,13 @@ namespace DiscImageChef.DiscImages
return true;
}
case SectorTagType.CdTrackIsrc:
{
if(data != null) trackIsrcs.Add((byte)track.TrackSequence, Encoding.UTF8.GetString(data));
return true;
}
case SectorTagType.CdSectorSubchannel:
{
if(data.Length != 96)
@@ -2968,6 +3064,7 @@ namespace DiscImageChef.DiscImages
return true;
}
default:
ErrorMessage = $"Don't know how to write sector tag type {tag}";
return false;