messagebuffer.h

hl2 source code. Do not use it illegal.

// MessageBuffer.h: interface for the CMessageBuffer class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_MESSAGEBUFFER_H__808F72A0_B24F_11D1_8748_006097A548BE__INCLUDED_)
#define AFX_MESSAGEBUFFER_H__808F72A0_B24F_11D1_8748_006097A548BE__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

// HL Connectionless Packet Protocol ID...
#define CCREQ_CONNECT		0x01
#define CCREQ_SERVER_INFO	0x02
#define CCREQ_PLAYER_INFO	0x03
#define CCREQ_RULE_INFO		0x04

#define CCREP_ACCEPT		0x81
#define CCREP_REJECT		0x82
#define CCREP_SERVER_INFO	0x83
#define CCREP_PLAYER_INFO	0x84
#define CCREP_RULE_INFO		0x85

#define	NET_NAMELEN			64

#define NET_MAXMESSAGE		8192
#define NET_HEADERSIZE		(2 * sizeof(unsigned int))
#define NET_DATAGRAMSIZE	(MAX_DATAGRAM + NET_HEADERSIZE)

// NetHeader flags
#define NETFLAG_LENGTH_MASK	0x0000ffff

#define NETFLAG_DATA		0x00010000
#define NETFLAG_ACK			0x00020000
#define NETFLAG_NAK			0x00040000
#define NETFLAG_EOM			0x00080000
#define NETFLAG_UNRELIABLE	0x00100000
#define NETFLAG_CTL			0x80000000

#define NET_PROTOCOL_VERSION	3

class CMessageBuffer  
{
public:
	int GetCurSize();
	void SetCurSize(int nSize);
	void * GetData();
	int GetMaxSize();
	CMessageBuffer();
	CMessageBuffer(int sz); // sets max size at allocation.
	virtual ~CMessageBuffer();

	void SZ_Alloc (int startsize);
	void SZ_Free ();
	void SZ_Clear ();
	void *SZ_GetSpace (int length);
	void SZ_Write (void *data, int length);
	void SZ_Print (char *data);	// strcats onto the sizebuf

	void  MSG_WriteChar (int c);
	void  MSG_WriteByte (int c);
	void  MSG_WriteShort (int c);
	void  MSG_WriteWord (int c);
	void  MSG_WriteLong (int c);
	void  MSG_WriteFloat (float f);
	void  MSG_WriteString (char *s);
	void  MSG_WriteBuf (int iSize, void *buf);
	void  MSG_WriteCoord (float f);
	void  MSG_WriteAngle (float f);
	void  MSG_WriteHiresAngle (float f);

	void  MSG_BeginReading (void);
	int	  MSG_ReadChar (void);
	int   MSG_ReadByte (void);
	int   MSG_ReadShort (void);
	int   MSG_ReadWord (void);
	int   MSG_ReadLong (void);
	float MSG_ReadFloat (void);
	char *MSG_ReadString (void);
	int   MSG_ReadBuf(int iSize, void *pbuf);
	float MSG_ReadCoord (void);
	float MSG_ReadAngle (void);
	float MSG_ReadHiresAngle (void);

protected:
	int		m_nMsgReadCount;
	BOOL	m_bMsgBadRead;
	unsigned char *m_pData;
	int		m_nMaxSize;
	int		m_nCurSize;
	BOOL	m_bAllowOverflow;	// if false, do a Sys_Error
	BOOL	m_bOverFlowed;		// set to true if the buffer size failed
};

#endif // !defined(AFX_MESSAGEBUFFER_H__808F72A0_B24F_11D1_8748_006097A548BE__INCLUDED_)