/// <summary>
/// Writes a signed integer using 1 to 32 bits
/// </summary>
public void Write(Int32 source, int numberOfBits)
{
NetException.Assert((numberOfBits > 0 && numberOfBits <= 32), "Write(int, numberOfBits) can only write between 1 and 32 bits");
EnsureBufferSize(m_bitLength + numberOfBits);
if (numberOfBits != 32)
{
// make first bit sign
int signBit = 1 << (numberOfBits - 1);
if (source < 0)
{
source = (-source - 1) | signBit;
}
else
{
source &= (~signBit);
}
}
NetBitWriter.WriteUInt32((uint)source, numberOfBits, m_data, m_bitLength);
m_bitLength += numberOfBits;
}
/// <summary>
/// Decrypt an incoming message encrypted with corresponding Encrypt
/// </summary>
/// <param name="msg">message to decrypt</param>
/// <returns>true if successful; false if failed</returns>
public override bool Decrypt(NetIncomingMessage msg)
{
int numEncryptedBytes = msg.LengthBytes - 4; // last 4 bytes is true bit length
int blockSize = BlockSize;
int numBlocks = numEncryptedBytes / blockSize;
if (numBlocks * blockSize != numEncryptedBytes)
{
return(false);
}
for (int i = 0; i < numBlocks; i++)
{
DecryptBlock(msg.m_data, (i * blockSize), m_tmp);
Buffer.BlockCopy(m_tmp, 0, msg.m_data, (i * blockSize), m_tmp.Length);
}
// read 32 bits of true payload length
uint realSize = NetBitWriter.ReadUInt32(msg.m_data, 32, (numEncryptedBytes * 8));
msg.m_bitLength = (int)realSize;
return(true);
}
/// <summary>
/// Reads the specified number of bits into a Byte without advancing the read pointer
/// </summary>
public byte PeekByte(int numberOfBits)
{
byte retval = NetBitWriter.ReadByte(m_data, numberOfBits, m_readPosition);
return(retval);
}
public static int WriteUInt64(ulong source, int numberOfBits, byte[] destination, int destinationBitOffset)
{
#if BIGENDIAN
source = ((source & 0xff00000000000000L) >> 56) |
((source & 0x00ff000000000000L) >> 40) |
((source & 0x0000ff0000000000L) >> 24) |
((source & 0x000000ff00000000L) >> 8) |
((source & 0x00000000ff000000L) << 8) |
((source & 0x0000000000ff0000L) << 24) |
((source & 0x000000000000ff00L) << 40) |
((source & 0x00000000000000ffL) << 56);
#endif
int returnValue = destinationBitOffset + numberOfBits;
if (numberOfBits <= 8)
{
NetBitWriter.WriteByte((byte)source, numberOfBits, destination, destinationBitOffset);
return(returnValue);
}
NetBitWriter.WriteByte((byte)source, 8, destination, destinationBitOffset);
destinationBitOffset += 8;
numberOfBits -= 8;
if (numberOfBits <= 8)
{
NetBitWriter.WriteByte((byte)(source >> 8), numberOfBits, destination, destinationBitOffset);
return(returnValue);
}
NetBitWriter.WriteByte((byte)(source >> 8), 8, destination, destinationBitOffset);
destinationBitOffset += 8;
numberOfBits -= 8;
if (numberOfBits <= 8)
{
NetBitWriter.WriteByte((byte)(source >> 16), numberOfBits, destination, destinationBitOffset);
return(returnValue);
}
NetBitWriter.WriteByte((byte)(source >> 16), 8, destination, destinationBitOffset);
destinationBitOffset += 8;
numberOfBits -= 8;
if (numberOfBits <= 8)
{
NetBitWriter.WriteByte((byte)(source >> 24), numberOfBits, destination, destinationBitOffset);
return(returnValue);
}
NetBitWriter.WriteByte((byte)(source >> 24), 8, destination, destinationBitOffset);
destinationBitOffset += 8;
numberOfBits -= 8;
if (numberOfBits <= 8)
{
NetBitWriter.WriteByte((byte)(source >> 32), numberOfBits, destination, destinationBitOffset);
return(returnValue);
}
NetBitWriter.WriteByte((byte)(source >> 32), 8, destination, destinationBitOffset);
destinationBitOffset += 8;
numberOfBits -= 8;
if (numberOfBits <= 8)
{
NetBitWriter.WriteByte((byte)(source >> 40), numberOfBits, destination, destinationBitOffset);
return(returnValue);
}
NetBitWriter.WriteByte((byte)(source >> 40), 8, destination, destinationBitOffset);
destinationBitOffset += 8;
numberOfBits -= 8;
if (numberOfBits <= 8)
{
NetBitWriter.WriteByte((byte)(source >> 48), numberOfBits, destination, destinationBitOffset);
return(returnValue);
}
NetBitWriter.WriteByte((byte)(source >> 48), 8, destination, destinationBitOffset);
destinationBitOffset += 8;
numberOfBits -= 8;
if (numberOfBits <= 8)
{
NetBitWriter.WriteByte((byte)(source >> 56), numberOfBits, destination, destinationBitOffset);
return(returnValue);
}
NetBitWriter.WriteByte((byte)(source >> 56), 8, destination, destinationBitOffset);
destinationBitOffset += 8;
numberOfBits -= 8;
return(returnValue);
}
public byte[] PeekBytes(int numberOfBytes)
{
byte[] retval = new byte[numberOfBytes];
NetBitWriter.ReadBytes(Data, numberOfBytes, m_readPosition, retval, 0);
return(retval);
}
//
// 8 bit
//
public byte PeekByte()
{
byte retval = NetBitWriter.ReadByte(Data, 8, m_readPosition);
return(retval);
}
public void Write(UInt64 source, int numberOfBits)
{
EnsureBufferSize(m_bitLength + numberOfBits);
NetBitWriter.WriteUInt64(source, numberOfBits, m_data, m_bitLength);
m_bitLength += numberOfBits;
}
public void Write(UInt32 source)
{
EnsureBufferSize(m_bitLength + 32);
NetBitWriter.WriteUInt32(source, 32, m_data, m_bitLength);
m_bitLength += 32;
}
internal void Write(Int32 source)
{
InternalEnsureBufferSize(m_bitLength + 32);
NetBitWriter.WriteUInt32((UInt32)source, 32, m_data, m_bitLength);
m_bitLength += 32;
}
internal void Write(Int16 source)
{
InternalEnsureBufferSize(m_bitLength + 16);
NetBitWriter.WriteUInt32((uint)source, 16, m_data, m_bitLength);
m_bitLength += 16;
}
/// <summary>
/// Write a <see cref="byte"/>.
/// </summary>
public static void Write(this IBitBuffer buffer, byte value)
{
buffer.EnsureEnoughBitCapacity(8);
NetBitWriter.WriteByte(value, 8, buffer.GetBuffer(), buffer.BitPosition);
buffer.IncrementBitPosition(8);
}
/// <summary>
/// Writes a <see cref="bool"/> value using 1 bit.
/// </summary>
public static void WriteBit(this IBitBuffer buffer, bool value)
{
buffer.EnsureEnoughBitCapacity(1);
NetBitWriter.WriteByte(value ? (byte)1 : (byte)0, 1, buffer.GetBuffer(), buffer.BitPosition);
buffer.IncrementBitPosition(1);
}
/// <summary>
/// Writes a <see cref="byte"/> using 1 to 8 bits.
/// </summary>
public static void Write(this IBitBuffer buffer, byte source, int bitCount)
{
buffer.EnsureEnoughBitCapacity(bitCount, maxBitCount: 8);
NetBitWriter.WriteByte(source, bitCount, buffer.GetBuffer(), buffer.BitPosition);
buffer.IncrementBitPosition(bitCount);
}
public static OperationStatus ReadVarUInt64(this IBitBuffer buffer, out ulong result)
{
return(NetBitWriter.ReadVarUInt64(buffer, peek: false, out result));
}
public static OperationStatus PeekVarUInt32(this IBitBuffer buffer, out uint result)
{
return(NetBitWriter.ReadVarUInt32(buffer, peek: true, out result));
}
public void Write(sbyte source)
{
EnsureBufferSize(m_bitLength + 8);
NetBitWriter.WriteByte((byte)source, 8, m_data, m_bitLength);
m_bitLength += 8;
}
/// <summary>
/// Writes a signed 16 bit integer
/// </summary>
public void Write(Int16 source)
{
EnsureBufferSize(m_bitLength + 16);
NetBitWriter.WriteUInt16((ushort)source, 16, m_data, m_bitLength);
m_bitLength += 16;
}
//
// 8 bit
//
internal void Write(byte source)
{
InternalEnsureBufferSize(m_bitLength + 8);
NetBitWriter.WriteByte(source, 8, m_data, m_bitLength);
m_bitLength += 8;
}
public void Write(UInt64 source)
{
EnsureBufferSize(m_bitLength + 64);
NetBitWriter.WriteUInt64(source, 64, m_data, m_bitLength);
m_bitLength += 64;
}
public UInt32 PeekUInt32()
{
uint retval = NetBitWriter.ReadUInt32(Data, 32, m_readPosition);
return(retval);
}
/// <summary>
/// Writes a boolean value using 1 bit
/// </summary>
public void Write(bool value)
{
EnsureBufferSize(m_bitLength + 1);
NetBitWriter.WriteByte((value ? (byte)1 : (byte)0), 1, m_data, m_bitLength);
m_bitLength += 1;
}
//
// 1 bit
//
public bool PeekBoolean()
{
byte retval = NetBitWriter.ReadByte(Data, 1, m_readPosition);
return(retval > 0 ? true : false);
}
