public void WriteChunkString(ChunkId chunkID, string value)
{
byte[] data = Encoding.UTF8.GetBytes(value);
chunkID.ToStream(_writer);
LEB128.Write(_writer, data.Length);
_writer.Write(data);
}
public void WriteChunkWithChildren(ChunkId chunkID, WriteChunkDelegate writeChunk, long maximumSize = LEB128.MaximumSize4Byte)
{
using (WriteChunk(chunkID, maximumSize))
{
writeChunk();
WriteChunkEnd();
}
}
public ChunkWritingState(ChunkWriter chunkWriter, ChunkId chunkID, long maximumSize)
{
_chunkWriter = chunkWriter;
// Write chunk ID
chunkID.ToStream(chunkWriter._writer);
// Write chunk size
_chunkSizePosition = chunkWriter._writer.Position;
LEB128.Write(chunkWriter._writer, 0, maximumSize);
// Prepare for writeing chunk content
_previousPosition = chunkWriter._writer.Position;
_maximumSize = maximumSize;
}
public void ReadChunks(ReadChunkDelegate tryParseChunk)
{
do
{
ChunkId chunkID = ChunkId.FromStream(_reader);
if (chunkID == ChunkId.Empty) // End reached
{
break;
}
// Check if chunk is known, and if not, mark it
if (_knownChunkList != null && !UnknownChunksFound &&
!_knownChunkList.Contains(chunkID))
{
UnknownChunksFound = true;
}
// Read up to a 64 bit number for the chunk size
long chunkSize = LEB128.ReadLong(_reader);
// Try loading chunk content
long chunkStart = _reader.BaseStream.Position;
bool chunkRecognized = false;
Exception chunkException = null;
try
{
chunkRecognized = tryParseChunk(chunkID, chunkSize);
}
catch (OperationCanceledException)
{ // Don't actually keep going if it's an 'OperationCanceledException'
throw;
}
catch (Exception exc)
{
chunkException = exc;
}
long readDataCount = _reader.BaseStream.Position - chunkStart;
// Print messages for various problems that might have occurred while loading
if (chunkException != null)
{
logger.Error(chunkException, "Chunk loading raised an exception" + GetLocoationStr(chunkStart, chunkSize, chunkID));
}
else if (!chunkRecognized)
{
logger.Warn("Chunk not recognized" + GetLocoationStr(chunkStart, chunkSize, chunkID));
}
else if (readDataCount > chunkSize)
{
logger.Error("More data was read than available (Read: " + readDataCount + " Available: " + chunkSize + ")" + GetLocoationStr(chunkStart, chunkSize, chunkID));
}
else if (readDataCount < chunkSize)
{
logger.Warn("Not all the available data was read (Read: " + readDataCount + " Available: " + chunkSize + ")" + GetLocoationStr(chunkStart, chunkSize, chunkID));
}
// Adjust _stream position if necessaary
if (readDataCount != chunkSize)
{
_reader.BaseStream.Position = chunkStart + chunkSize;
}
} while (true);
}
// Raise exceptions if there were any problems
private static string GetLocoationStr(long chunkStart, long chunkSize, ChunkId chunkID)
{
return(" at offset " + chunkStart + " with size " + chunkSize + ". " + chunkID);
}
public void WriteChunkVector4(ChunkId chunkID, Vector4 value)
{
chunkID.ToStream(_writer);
LEB128.Write(_writer, 16);
_writer.Write(value);
}
public void WriteChunkFloat(ChunkId chunkID, double value)
{
chunkID.ToStream(_writer);
LEB128.Write(_writer, 8);
_writer.Write(value);
}
public void WriteChunkInt(ChunkId chunkID, long value)
{
chunkID.ToStream(_writer);
LEB128.Write(_writer, LEB128.GetLength(_writer, value));
LEB128.Write(_writer, value);
}
public void WriteChunkArrayOfBytes(ChunkId chunkID, byte[] value)
{
chunkID.ToStream(_writer);
LEB128.Write(_writer, value.Length);
_writer.Write(value);
}
public void WriteChunkBool(ChunkId chunkID, bool value)
{
chunkID.ToStream(_writer);
LEB128.Write(_writer, 1);
_writer.Write(value);
}
public void WriteChunkEmpty(ChunkId chunkID)
{
chunkID.ToStream(_writer);
LEB128.Write(_writer, 0);
}
public void WriteChunk(ChunkId chunkID, WriteChunkDelegate writeChunk, long maximumSize = LEB128.MaximumSize4Byte)
{
using (WriteChunk(chunkID, maximumSize))
writeChunk();
}
public ChunkWritingState WriteChunk(ChunkId chunkID, long maximumSize = LEB128.MaximumSize4Byte) => new ChunkWritingState(this, chunkID, maximumSize);