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// Packetizer.h
// Declares the cPacketizer class representing a wrapper for sending a single packet over a protocol.
// The class provides auto-locking, serialization and send-on-instance-destroy semantics
#pragma once
#include "Protocol.h"
#include "../ByteBuffer.h"
/** Composes an individual packet in the protocol's m_OutPacketBuffer; sends it just before being destructed. */
class cPacketizer
{
public:
/** Starts serializing a new packet into the protocol's m_OutPacketBuffer.
Locks the protocol's m_CSPacket to avoid multithreading issues. */
cPacketizer(cProtocol & a_Protocol, UInt32 a_PacketType) :
m_Protocol(a_Protocol),
m_Out(a_Protocol.m_OutPacketBuffer),
m_Lock(a_Protocol.m_CSPacket),
m_PacketType(a_PacketType) // Used for logging purposes
{
m_Out.WriteVarInt(a_PacketType);
}
/** Sends the packet via the contained protocol's SendPacket() function. */
~cPacketizer();
inline void WriteBool(bool a_Value)
{
VERIFY(m_Out.WriteBool(a_Value));
}
inline void WriteByte(Byte a_Value)
{
VERIFY(m_Out.WriteBEUInt8(a_Value));
}
inline void WriteChar(char a_Value)
{
VERIFY(m_Out.WriteBEInt8(a_Value));
}
inline void WriteShort(short a_Value)
{
VERIFY(m_Out.WriteBEInt16(a_Value));
}
inline void WriteBEUInt16(short a_Value)
{
VERIFY(m_Out.WriteBEUInt16(a_Value));
}
inline void WriteInt(Int32 a_Value)
{
VERIFY(m_Out.WriteBEInt32(a_Value));
}
inline void WriteUInt32(UInt32 a_Value)
{
VERIFY(m_Out.WriteBEUInt32(a_Value));
}
inline void WriteInt64(Int64 a_Value)
{
VERIFY(m_Out.WriteBEInt64(a_Value));
}
inline void WriteFloat(float a_Value)
{
VERIFY(m_Out.WriteBEFloat(a_Value));
}
inline void WriteDouble(double a_Value)
{
VERIFY(m_Out.WriteBEDouble(a_Value));
}
inline void WriteVarInt(UInt32 a_Value)
{
VERIFY(m_Out.WriteVarInt(a_Value));
}
inline void WriteString(const AString & a_Value)
{
VERIFY(m_Out.WriteVarUTF8String(a_Value));
}
inline void WriteBuf(const char * a_Data, size_t a_Size)
{
VERIFY(m_Out.Write(a_Data, a_Size));
}
/** Writes the specified block position as a single encoded 64-bit BigEndian integer. */
inline void WritePosition(int a_BlockX, int a_BlockY, int a_BlockZ)
{
VERIFY(m_Out.WritePosition64(a_BlockX, a_BlockY, a_BlockZ));
}
/** Writes the specified angle using a single byte. */
void WriteByteAngle(double a_Angle);
/** Writes the double value as a 27:5 fixed-point integer. */
void WriteFPInt(double a_Value);
/** Writes the specified UUID as a 128-bit BigEndian integer. */
void WriteUUID(const AString & a_UUID);
UInt32 GetPacketType(void) const { return m_PacketType; }
protected:
/** The protocol instance in which the packet is being constructed. */
cProtocol & m_Protocol;
/** The protocol's buffer for the constructed packet data. */
cByteBuffer & m_Out;
/** The RAII lock preventing multithreaded access to the protocol buffer while constructing the packet. */
cCSLock m_Lock;
/** Type of the contained packet.
Used for logging purposes, the packet type is encoded into m_Out immediately in constructor. */
UInt32 m_PacketType;
} ;
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