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-rw-r--r--src/Protocol/Packetizer.h149
1 files changed, 149 insertions, 0 deletions
diff --git a/src/Protocol/Packetizer.h b/src/Protocol/Packetizer.h
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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;
+} ;
+
+
+
+