private void ReadChunkHeader(Bitstream stream)
{
header = new ChunkedHeader();
header.IsFile = stream.ReadBool();
if (header.IsFile)
{
var filenameLength = stream.ReadUInt32();
var filename = new byte[filenameLength + 1]; // semantically wrong. should be
// 0x104
stream.Read(filename, 0, (int) filenameLength); // and then read to end of string
filename[filenameLength] = 0; // whatever
header.Filename = Encoding.UTF8.GetString(filename);
throw new NotImplementedException();
}
header.IsCompressed = stream.ReadBool();
if (header.IsCompressed)
{
header.DecompressedLength = stream.ReadBits(26);
}
header.ByteLength = stream.ReadBits(26);
header.ChunkCount =
(header.ByteLength + DotaGameConnection.BYTES_PER_CHUNK - 1)/
DotaGameConnection.BYTES_PER_CHUNK;
Receiving = true;
dataIn = new byte[header.ByteLength];
dataReceived = new bool[header.ChunkCount];
countReceived = 0;
}
private string ReadKeyIfIncluded(Bitstream stream, List<string> keyHistory)
{
var has_key = stream.ReadBool();
if (!has_key)
{
return null;
}
var is_substring = stream.ReadBool();
string key;
if (!is_substring)
{
key = stream.ReadString();
}
else
{
var fromIndex = (int) stream.ReadBits(5);
var fromLength = (int) stream.ReadBits(5);
key = keyHistory[fromIndex].Substring(0, fromLength);
key += stream.ReadString();
}
if (keyHistory.Count == KEY_HISTORY_SIZE)
{
keyHistory.RemoveAt(0);
}
keyHistory.Add(key);
return key;
}
public Message? Receive(Bitstream stream)
{
var hasData = stream.ReadBool();
if (!hasData)
{
return null;
}
if (stream.ReadBool())
{
return ReadChunk(stream);
}
return ReadSingle(stream);
}
public void Update(Bitstream stream, uint baseline, bool updateBaseline, uint updated, bool isDelta)
{
var id = uint.MaxValue;
uint found = 0;
while (found < updated)
{
var flags = ReadHeader(ref id, stream);
if (flags.HasFlag(UpdateFlag.EnterPvs))
{
ReadEnterPvs(id, baseline, updateBaseline, stream);
}
else if (flags.HasFlag(UpdateFlag.LeavePvs))
{
if (flags.HasFlag(UpdateFlag.Delete))
{
Delete(id);
}
}
else
{
ReadUpdate(id, stream);
}
++found;
}
if (isDelta)
{
while (stream.ReadBool())
{
id = stream.ReadBits(11);
Delete(id);
}
}
}
public ulong UnpackInt64(PropertyInfo info, Bitstream stream)
{
if (info.Flags.HasFlag(PropertyInfo.MultiFlag.EncodedAgainstTickcount))
{
return stream.ReadVarUInt();
}
var negate = false;
var secondBits = (byte) (info.NumBits - 32);
if (!info.Flags.HasFlag(PropertyInfo.MultiFlag.Unsigned))
{
--secondBits;
if (stream.ReadBool())
{
negate = true;
}
}
ulong a = stream.ReadBits(32);
ulong b = stream.ReadBits(secondBits);
var value = (b << 32) | a;
if (negate)
{
value = unchecked((ulong) ((long) value*-1));
}
return value;
}
public Vector UnpackVector(PropertyInfo info, Bitstream stream)
{
var x = UnpackFloat(info, stream);
var y = UnpackFloat(info, stream);
float z;
if (info.Flags.HasFlag(PropertyInfo.MultiFlag.Normal))
{
var sign = stream.ReadBool();
var f = x*x + y*y;
if (1 >= f)
{
z = 0;
}
else
{
z = (float) Math.Sqrt(1 - f);
}
if (sign)
{
z *= -1;
}
}
else
{
z = UnpackFloat(info, stream);
}
return new Vector(x, y, z);
}
private float UnpackFloatNormal(Bitstream stream)
{
var sign = stream.ReadBool();
var value = stream.ReadBits(NORMAL_FRACTIONAL_BITS);
var f = (float) (value*NORMAL_RESOLUTION);
if (sign)
{
f *= -1;
}
return f;
}
private float UnpackFloatCoord(Bitstream stream)
{
var hasInteger = stream.ReadBool();
var hasFraction = stream.ReadBool();
if (hasInteger || hasFraction)
{
var sign = stream.ReadBool();
uint integer = 0;
if (hasInteger)
{
integer = stream.ReadBits(COORD_INTEGER_BITS) + 1;
}
uint fraction = 0;
if (hasFraction)
{
fraction = stream.ReadBits(COORD_FRACTIONAL_BITS);
}
var f = (float) (integer + fraction*COORD_RESOLUTION);
if (sign)
{
f *= -1;
}
return f;
}
return 0;
}
private Message ReadSingle(Bitstream stream)
{
var isCompressed = stream.ReadBool();
if (isCompressed)
{
var uncompressed_length = stream.ReadBits(26);
var length = stream.ReadBits(18);
var data = new byte[length];
stream.Read(data, 0, (int) length);
return new Message
{
IsCompressed = false,
Data = new SnappyDecompressor().Decompress(data, 0, data.Length)
};
}
else
{
var length = stream.ReadBits(18);
var data = new byte[length];
stream.Read(data, 0, (int) length);
return new Message
{
IsCompressed = false,
Data = data
};
}
}
private UpdateFlag ReadHeader(ref uint id, Bitstream stream)
{
var value = stream.ReadBits(6);
if ((value & 0x30) > 0)
{
var a = (value >> 4) & 3;
var b = (uint) ((a == 3) ? 16 : 0);
value = (stream.ReadBits((byte) (4*a + b)) << 4) | (value & 0xF);
}
id = unchecked(id + value + 1);
var flags = UpdateFlag.None;
if (!stream.ReadBool())
{
if (stream.ReadBool())
{
flags |= UpdateFlag.EnterPvs;
}
}
else
{
flags |= UpdateFlag.LeavePvs;
if (stream.ReadBool())
{
flags |= UpdateFlag.Delete;
}
}
return flags;
}
private uint ReadFieldNumber(uint lastField, Bitstream stream)
{
if (stream.ReadBool())
{
return unchecked(lastField + 1);
}
var value = stream.ReadVarUInt();
if (value == 0x3FFF)
{
return uint.MaxValue;
}
return unchecked(lastField + value + 1);
}
private byte[] ReadValueIfIncluded(Bitstream stream, bool userDataFixedSize,
uint userDataSizeBits)
{
var has_value = stream.ReadBool();
if (!has_value)
{
return null;
}
uint length;
uint bitLength;
if (userDataFixedSize)
{
length = (userDataSizeBits + 7)/8;
bitLength = userDataSizeBits;
}
else
{
length = stream.ReadBits(14);
bitLength = 8*length;
}
return stream.ReadManyBits(bitLength);
}
