public static sbyte GetLength(BinaryWriterFast stream, long value)
{
sbyte length = 1;
value >>= 6;
while (value > 0)
{
value >>= 7;
length += 1;
}
return(length);
}
public SimplerChunkWriter(byte[] magicNumber, Stream stream, Compression compression = Compression.None, int compressionLevel = ZLib.DefaultCompressionLevel)
{
stream.Write(magicNumber, 0, magicNumber.Length);
_compression = compression;
_compressionLevel = compressionLevel;
_baseStream = stream;
switch (compression)
{
case Compression.None:
new BinaryWriter(stream).Write((uint)0);
_writer = new BinaryWriterFast(stream);
break;
case Compression.Zlib:
new BinaryWriter(stream).Write((uint)0x80000000);
_writer = new BinaryWriterFast(new MemoryStream());
break;
default:
throw new ArgumentException("compression");
}
}
public static void Write(BinaryWriterFast stream, long value, long maximumSize)
{
do
{
// Write byte
byte currentByte = unchecked ((byte)(value & 0x7F));
if (maximumSize >> 6 == 0 || maximumSize >> 6 == -1)
{
stream.Write(currentByte);
if (value >> 6 != 0 && value >> 6 != -1)
{
throw new OverflowException("Unable to write integer because the available space overflowed.");
}
return;
}
stream.Write((byte)(currentByte | 0x80));
// Move data to next byte
value >>= 7;
maximumSize >>= 7;
} while (true);
}
public static void Write(BinaryWriterFast stream, long value) => Write(stream, value, value);
public void ToStream(BinaryWriterFast stream)
{
LEB128.Write(stream, _idLength);
stream.Write(_idBytes, 0, _idLength);
}
public ChunkWriter(byte[] magicNumber, BinaryWriterFast fastWriter)
{
fastWriter.Write(magicNumber, 0, magicNumber.Length);
fastWriter.Write(BitConverter.GetBytes(0), 0, 4); // @FIXME: where is the compression handling, as above?
_writer = fastWriter;
}