engineclient.h

#pragma once
class bf_read {
public:
	const char* m_pDebugName;
	bool m_bOverflow;
	int m_nDataBits;
	unsigned int m_nDataBytes;
	unsigned int m_nInBufWord;
	int m_nBitsAvail;
	const unsigned int* m_pDataIn;
	const unsigned int* m_pBufferEnd;
	const unsigned int* m_pData;

	bf_read() = default;

	bf_read(const void* pData, int nBytes, int nBits = -1) {
		StartReading(pData, nBytes, 0, nBits);
	}

	void StartReading(const void* pData, int nBytes, int iStartBit, int nBits) {
		// Make sure it's dword aligned and padded.
		m_pData = (uint32_t*)pData;
		m_pDataIn = m_pData;
		m_nDataBytes = nBytes;

		if (nBits == -1) {
			m_nDataBits = nBytes << 3;
		}
		else {
			m_nDataBits = nBits;
		}
		m_bOverflow = false;
		m_pBufferEnd = reinterpret_cast<uint32_t const*>(reinterpret_cast<uint8_t const*>(m_pData) + nBytes);
		if (m_pData)
			Seek(iStartBit);
	}

	bool Seek(int nPosition) {
		bool bSucc = true;
		if (nPosition < 0 || nPosition > m_nDataBits) {
			m_bOverflow = true;
			bSucc = false;
			nPosition = m_nDataBits;
		}
		int nHead = m_nDataBytes & 3; // non-multiple-of-4 bytes at head of buffer. We put the "round off"
									  // at the head to make reading and detecting the end efficient.

		int nByteOfs = nPosition / 8;
		if ((m_nDataBytes < 4) || (nHead && (nByteOfs < nHead))) {
			// partial first dword
			uint8_t const* pPartial = (uint8_t const*)m_pData;
			if (m_pData) {
				m_nInBufWord = *(pPartial++);
				if (nHead > 1)
					m_nInBufWord |= (*pPartial++) << 8;
				if (nHead > 2)
					m_nInBufWord |= (*pPartial++) << 16;
			}
			m_pDataIn = (uint32_t const*)pPartial;
			m_nInBufWord >>= (nPosition & 31);
			m_nBitsAvail = (nHead << 3) - (nPosition & 31);
		}
		else {
			int nAdjPosition = nPosition - (nHead << 3);
			m_pDataIn = reinterpret_cast<uint32_t const*>(
				reinterpret_cast<uint8_t const*>(m_pData) + ((nAdjPosition / 32) << 2) + nHead);
			if (m_pData) {
				m_nBitsAvail = 32;
				GrabNextDWord();
			}
			else {
				m_nInBufWord = 0;
				m_nBitsAvail = 1;
			}
			m_nInBufWord >>= (nAdjPosition & 31);
			m_nBitsAvail = std::min(m_nBitsAvail, 32 - (nAdjPosition & 31)); // in case grabnextdword overflowed
		}
		return bSucc;
	}

	FORCEINLINE void GrabNextDWord(bool bOverFlowImmediately = false) {
		if (m_pDataIn == m_pBufferEnd) {
			m_nBitsAvail = 1; // so that next read will run out of words
			m_nInBufWord = 0;
			m_pDataIn++; // so seek count increments like old
			if (bOverFlowImmediately)
				m_bOverflow = true;
		}
		else if (m_pDataIn > m_pBufferEnd) {
			m_bOverflow = true;
			m_nInBufWord = 0;
		}
		else {
			m_nInBufWord = DWORD(*(m_pDataIn++));
		}
	}
};

class bf_write {
public:
	unsigned char* m_pData;
	int m_nDataBytes;
	int m_nDataBits;
	int m_iCurBit;
	bool m_bOverflow;
	bool m_bAssertOnOverflow;
	const char* m_pDebugName;

	void StartWriting(void* pData, int nBytes, int iStartBit = 0, int nBits = -1) {
		// Make sure it's dword aligned and padded.
		// The writing code will overrun the end of the buffer if it isn't dword aligned, so truncate to force alignment
		nBytes &= ~3;

		m_pData = (unsigned char*)pData;
		m_nDataBytes = nBytes;

		if (nBits == -1) {
			m_nDataBits = nBytes << 3;
		}
		else {
			m_nDataBits = nBits;
		}

		m_iCurBit = iStartBit;
		m_bOverflow = false;
	}

	bf_write() {
		m_pData = NULL;
		m_nDataBytes = 0;
		m_nDataBits = -1; // set to -1 so we generate overflow on any operation
		m_iCurBit = 0;
		m_bOverflow = false;
		m_bAssertOnOverflow = true;
		m_pDebugName = NULL;
	}

	// nMaxBits can be used as the number of bits in the buffer.
	// It must be <= nBytes*8. If you leave it at -1, then it's set to nBytes * 8.
	bf_write(void* pData, int nBytes, int nBits = -1) {
		m_bAssertOnOverflow = true;
		m_pDebugName = NULL;
		StartWriting(pData, nBytes, 0, nBits);
	}

	bf_write(const char* pDebugName, void* pData, int nBytes, int nBits = -1) {
		m_bAssertOnOverflow = true;
		m_pDebugName = pDebugName;
		StartWriting(pData, nBytes, 0, nBits);
	}
};

class CLC_Move {
private:
	char __PAD0[0x8]; // 0x0 two vtables
public:
	int backup_commands;
	int new_commands;
	std::string* data;
	bf_write* data_out;
	bf_read* data_in;
};                       // size: 0x50

template < typename T >
class CNetMessagePB : public INetMessage, public T {};
using CCLCMsg_Move_t = CNetMessagePB< CLC_Move >;

class INetMessage {
public:
	virtual	~INetMessage() = default;

	virtual void SetNetChannel(void* netchan) = 0;
	virtual void SetReliable(bool state) = 0;
	virtual bool Process() = 0;
	virtual	bool ReadFromBuffer(void* buffer) = 0;
	virtual	bool WriteToBuffer(void* buffer) = 0;
	virtual bool IsReliable() const = 0;
	virtual int	GetType() const = 0;
	virtual int	GetGroup() const = 0;
	virtual const char* GetName() const = 0;
	virtual void* GetNetChannel() const = 0;
	virtual const char* ToString() const = 0;
};

class INetChannel {
public:
	enum {
		GENERIC = 0,	// must be first and is default group
		LOCALPLAYER,	// bytes for local player entity update
		OTHERPLAYERS,	// bytes for other players update
		ENTITIES,		// all other entity bytes
		SOUNDS,			// game sounds
		EVENTS,			// event messages
		TEMPENTS,		// temp entities
		USERMESSAGES,	// user messages
		ENTMESSAGES,	// entity messages
		VOICE,			// voice data
		STRINGTABLE,	// a stringtable update
		MOVE,			// client move cmds
		STRINGCMD,		// string command
		SIGNON,			// various signondata
		TOTAL,			// must be last and is not a real group
	};

	enum {
		FLOW_OUTGOING = 0,
		FLOW_INCOMING = 1,
		MAX_FLOWS = 2
	};

	enum indices : size_t {
		GETLATENCY = 9,
		GETAVGLATENCY = 10,
		PROCESSPACKET = 41,
		SENDNETMSG = 42,
		SENDDATAGRAM = 48,
	};


public:
	__forceinline float GetLatency(int flow) {
		return util::get_method< float(__thiscall*)(decltype(this), int) >(this, GETLATENCY)(this, flow);
	}

	__forceinline float GetAvgLatency(int flow) {
		return util::get_method< float(__thiscall*)(decltype(this), int) >(this, GETAVGLATENCY)(this, flow);
	}


	__forceinline bool SendNetMsg(void* msg, bool rel = false, bool voice = false) {
		return util::get_method< bool(__thiscall*)(decltype(this), void*, bool, bool) >(this, SENDNETMSG)(this, msg, rel, voice);
	}

private:
	PAD(0x14);

public:
	bool m_processing_messages;		// 0x0014
	bool m_should_delete;			// 0x0015

private:
	PAD(0x2);

public:
	int m_out_seq;					// 0x0018 last send outgoing sequence number
	int m_in_seq;					// 0x001C last received incoming sequnec number
	int m_out_seq_ack;				// 0x0020 last received acknowledge outgoing sequnce number
	int m_out_rel_state;			// 0x0024 state of outgoing reliable data (0/1) flip flop used for loss detection
	int m_in_rel_state;				// 0x0028 state of incoming reliable data
	int m_choked_packets;			// 0x002C number of choked packets

private:
	PAD(0x414);					// 0x0030
};

struct player_info_t {
	uint64_t      m_data_map;
	union {
		int64_t   m_xuid;
		struct {
			int   m_xuid_low;
			int   m_xuid_high;
		};
	};
	char          m_name[128];
	int           m_user_id;
	char          m_guid[33];
	uint32_t      m_friends_id;
	char          m_friends_name[128];
	bool          m_fake_player;
	bool          m_is_hltv;
	uint32_t      m_custom_files[4];
	uint8_t       m_files_downloaded;
};

class CEventInfo {
public:
	enum {
		EVENT_INDEX_BITS = 8,
		EVENT_DATA_LEN_BITS = 11,
		MAX_EVENT_DATA = 192,  // ( 1<<8 bits == 256, but only using 192 below )
	};

	// 0 implies not in use
	short					m_class_id;
	float					m_fire_delay;
	const void* m_send_table;
	const ClientClass* m_client_class;
	int						m_bits;
	uint8_t* m_data;
	int						m_flags;
	PAD(0x18);
	CEventInfo* m_next;
};

class CClientState {
private:
	PAD(0x9C);                                // 0x0000

public:
	INetChannel* m_net_channel;				// 0x009C

private:
	PAD(0x70);                                // 0x00A0

public:
	int				m_next_message_time;		// 0x0110

public:
	float           m_net_cmd_time;             // 0x0114
	uint32_t        m_server_count;             // 0x0118
private:
	PAD(0x4C);								// 0x011C

public:
	int             m_unk;                      // 0x0168
	int             m_server_tick;              // 0x016C
	int             m_client_tick;              // 0x0170
	int             m_delta_tick;               // 0x0174

private:
	PAD(0x4B30);                              // 0x0178

public:
	float           m_frame_time;               // 0x4CA8
	int             m_last_outgoing_command;    // 0x4CAC
	int             m_choked_commands;          // 0x4CB0
	int             m_last_command_ack;         // 0x4CB4
	uint32_t	    m_nSoundSequence;
	PAD(0x134);                               // 0x4CB8
	CEventInfo* m_events;					// 0x4DEC

	enum indices : size_t {
		TEMPENTITIES = 36,
	};
};

class CGlobalState {
public:
	uintptr_t* m_manager;
	CClientState* m_client_state;
};

class IVEngineClient {
public:
	enum indices : size_t {
		GETSCREENSIZE = 5,
		GETPLAYERINFO = 8,
		GETPLAYERFORUSERID = 9,
		GETLOCALPLAYER = 12,
		GETLASTTIMESTAMP = 14,
		GETVIEWANGLES = 18,
		SETVIEWANGLES = 19,
		//GETMAXCLIENTS          = 20,
		ISINGAME = 26,
		ISCONNECTED = 27,
		WORLDTOSCREENMATRIX = 37,
		FIREEVENTS = 59,
		GETNETCHANNELINFO = 78,
		ISPAUSED = 90,
		//ISTAKINGSCREENSHOT     = 92,
		ISHLTV = 93,
		//SETOCCLUSIONPARAMETERS = 96,
		EXECUTECLIENTCMD = 108,
	};

public:
	__forceinline void GetScreenSize(int& width, int& height) {
		return util::get_method< void(__thiscall*)(decltype(this), int&, int&) >(this, GETSCREENSIZE)(this, width, height);
	}

	__forceinline bool GetPlayerInfo(int index, player_info_t* info) {
		return util::get_method< bool(__thiscall*)(decltype(this), int, player_info_t*) >(this, GETPLAYERINFO)(this, index, info);
	}

	__forceinline int GetPlayerForUserID(int uid) {
		return util::get_method< int(__thiscall*)(decltype(this), int) >(this, GETPLAYERFORUSERID)(this, uid);
	}

	__forceinline int GetLocalPlayer() {
		return util::get_method< int(__thiscall*)(decltype(this)) >(this, GETLOCALPLAYER)(this);
	}

	__forceinline float GetLastTimestamp() {
		return util::get_method< float(__thiscall*)(decltype(this)) >(this, GETLASTTIMESTAMP)(this);
	}

	__forceinline void GetViewAngles(ang_t& angle) {
		return util::get_method< void(__thiscall*)(decltype(this), ang_t&) >(this, GETVIEWANGLES)(this, angle);
	}

	__forceinline void SetViewAngles(ang_t& angle) {
		return util::get_method< void(__thiscall*)(decltype(this), ang_t&) >(this, SETVIEWANGLES)(this, angle);
	}

	__forceinline bool IsInGame() {
		return util::get_method< bool(__thiscall*)(decltype(this)) >(this, ISINGAME)(this);
	}

	__forceinline bool IsConnected() {
		return util::get_method< bool(__thiscall*)(decltype(this)) >(this, ISCONNECTED)(this);
	}

	__forceinline const VMatrix& WorldToScreenMatrix() {
		return util::get_method< const VMatrix& (__thiscall*)(decltype(this)) >(this, WORLDTOSCREENMATRIX)(this);
	}

	__forceinline void FireEvents() {
		return util::get_method< void(__thiscall*)(decltype(this)) >(this, FIREEVENTS)(this);
	}

	__forceinline INetChannel* GetNetChannelInfo() {
		return util::get_method< INetChannel* (__thiscall*)(decltype(this)) >(this, GETNETCHANNELINFO)(this);
	}

	__forceinline bool IsPaused() {
		return util::get_method< bool(__thiscall*)(decltype(this)) >(this, ISPAUSED)(this);
	}

	__forceinline void ExecuteClientCmd(const char* cmd) {
		return util::get_method< void(__thiscall*)(decltype(this), const char*)>(this, EXECUTECLIENTCMD)(this, cmd);
	}

	//__forceinline void SetOcclusionParameters( float min, float max ) {
	//	float arr[] = { min, max };
	//	return util::get_method< void( __thiscall* )( decltype( this ), float* ) >( this, SETOCCLUSIONPARAMETERS )( this, arr );
	//}
};