mirror of
https://github.com/FWGS/xash3d-fwgs
synced 2024-12-01 06:30:32 +01:00
136 lines
5.8 KiB
C
136 lines
5.8 KiB
C
/*
|
|
net_buffer.h - network message io functions
|
|
Copyright (C) 2010 Uncle Mike
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef NET_BUFFER_H
|
|
#define NET_BUFFER_H
|
|
|
|
#include "enginefeatures.h"
|
|
|
|
/*
|
|
==============================================================================
|
|
|
|
MESSAGE IO FUNCTIONS
|
|
Handles byte ordering and avoids alignment errors
|
|
==============================================================================
|
|
*/
|
|
|
|
// Pad a number so it lies on an N byte boundary.
|
|
// So PAD_NUMBER(0,4) is 0 and PAD_NUMBER(1,4) is 4
|
|
#define PAD_NUMBER( num, boundary ) ((( num ) + (( boundary ) - 1 )) / ( boundary )) * ( boundary )
|
|
|
|
_inline int BitByte( int bits )
|
|
{
|
|
return PAD_NUMBER( bits, 8 ) >> 3;
|
|
}
|
|
|
|
typedef struct sizebuf_s
|
|
{
|
|
qboolean bOverflow; // overflow reading or writing
|
|
const char *pDebugName; // buffer name (pointer to const name)
|
|
|
|
byte *pData;
|
|
int iCurBit;
|
|
int nDataBits;
|
|
} sizebuf_t;
|
|
|
|
#define MSG_StartReading MSG_StartWriting
|
|
#define MSG_GetNumBytesRead MSG_GetNumBytesWritten
|
|
#define MSG_GetRealBytesRead MSG_GetRealBytesWritten
|
|
#define MSG_GetNumBitsRead MSG_GetNumBitsWritten
|
|
#define MSG_ReadBitAngles MSG_ReadBitVec3Coord
|
|
#define MSG_ReadString( sb ) MSG_ReadStringExt( sb, false )
|
|
#define MSG_ReadStringLine( sb ) MSG_ReadStringExt( sb, true )
|
|
#define MSG_ReadAngle( sb ) (float)(MSG_ReadChar( sb ) * ( 360.0f / 256.0f ))
|
|
#define MSG_Init( sb, name, data, bytes ) MSG_InitExt( sb, name, data, bytes, -1 )
|
|
|
|
// common functions
|
|
void MSG_InitExt( sizebuf_t *sb, const char *pDebugName, void *pData, int nBytes, int nMaxBits );
|
|
void MSG_InitMasks( void ); // called once at startup engine
|
|
int MSG_SeekToBit( sizebuf_t *sb, int bitPos, int whence );
|
|
void MSG_ExciseBits( sizebuf_t *sb, int startbit, int bitstoremove );
|
|
_inline int MSG_TellBit( sizebuf_t *sb ) { return sb->iCurBit; }
|
|
_inline const char *MSG_GetName( sizebuf_t *sb ) { return sb->pDebugName; }
|
|
qboolean MSG_CheckOverflow( sizebuf_t *sb );
|
|
short MSG_BigShort( short swap );
|
|
|
|
// init writing
|
|
void MSG_StartWriting( sizebuf_t *sb, void *pData, int nBytes, int iStartBit, int nBits );
|
|
void MSG_Clear( sizebuf_t *sb );
|
|
|
|
// Bit-write functions
|
|
void MSG_WriteOneBit( sizebuf_t *sb, int nValue );
|
|
void MSG_WriteUBitLong( sizebuf_t *sb, uint curData, int numbits );
|
|
void MSG_WriteSBitLong( sizebuf_t *sb, int data, int numbits );
|
|
void MSG_WriteBitLong( sizebuf_t *sb, uint data, int numbits, qboolean bSigned );
|
|
qboolean MSG_WriteBits( sizebuf_t *sb, const void *pData, int nBits );
|
|
void MSG_WriteBitAngle( sizebuf_t *sb, float fAngle, int numbits );
|
|
void MSG_WriteBitFloat( sizebuf_t *sb, float val );
|
|
|
|
// Byte-write functions
|
|
#define MSG_BeginServerCmd( sb, cmd ) MSG_WriteCmdExt( sb, cmd, NS_SERVER, NULL )
|
|
#define MSG_BeginClientCmd( sb, cmd ) MSG_WriteCmdExt( sb, cmd, NS_CLIENT, NULL )
|
|
void MSG_WriteCmdExt( sizebuf_t *sb, int cmd, netsrc_t type, const char *name ); // message marker
|
|
void MSG_WriteChar( sizebuf_t *sb, int val );
|
|
void MSG_WriteByte( sizebuf_t *sb, int val );
|
|
void MSG_WriteShort( sizebuf_t *sb, int val );
|
|
void MSG_WriteWord( sizebuf_t *sb, int val );
|
|
void MSG_WriteLong( sizebuf_t *sb, int val );
|
|
void MSG_WriteDword( sizebuf_t *sb, dword val );
|
|
void MSG_WriteCoord( sizebuf_t *sb, float val );
|
|
void MSG_WriteFloat( sizebuf_t *sb, float val );
|
|
void MSG_WriteVec3Coord( sizebuf_t *sb, const float *fa );
|
|
void MSG_WriteVec3Angles( sizebuf_t *sb, const float *fa );
|
|
qboolean MSG_WriteBytes( sizebuf_t *sb, const void *pBuf, int nBytes ); // same as MSG_WriteData
|
|
qboolean MSG_WriteString( sizebuf_t *sb, const char *pStr ); // returns false if it overflows the buffer.
|
|
|
|
// helper functions
|
|
_inline int MSG_GetNumBytesWritten( sizebuf_t *sb ) { return BitByte( sb->iCurBit ); }
|
|
_inline int MSG_GetRealBytesWritten( sizebuf_t *sb ) { return sb->iCurBit >> 3; } // unpadded
|
|
_inline int MSG_GetNumBitsWritten( sizebuf_t *sb ) { return sb->iCurBit; }
|
|
_inline int MSG_GetMaxBits( sizebuf_t *sb ) { return sb->nDataBits; }
|
|
_inline int MSG_GetMaxBytes( sizebuf_t *sb ) { return sb->nDataBits >> 3; }
|
|
_inline int MSG_GetNumBitsLeft( sizebuf_t *sb ) { return sb->nDataBits - sb->iCurBit; }
|
|
_inline int MSG_GetNumBytesLeft( sizebuf_t *sb ) { return MSG_GetNumBitsLeft( sb ) >> 3; }
|
|
_inline byte *MSG_GetData( sizebuf_t *sb ) { return sb->pData; }
|
|
_inline byte *MSG_GetBuf( sizebuf_t *sb ) { return sb->pData; } // just an alias
|
|
|
|
// Bit-read functions
|
|
int MSG_ReadOneBit( sizebuf_t *sb );
|
|
float MSG_ReadBitFloat( sizebuf_t *sb );
|
|
qboolean MSG_ReadBits( sizebuf_t *sb, void *pOutData, int nBits );
|
|
float MSG_ReadBitAngle( sizebuf_t *sb, int numbits );
|
|
int MSG_ReadSBitLong( sizebuf_t *sb, int numbits );
|
|
uint MSG_ReadUBitLong( sizebuf_t *sb, int numbits );
|
|
uint MSG_ReadBitLong( sizebuf_t *sb, int numbits, qboolean bSigned );
|
|
|
|
// Byte-read functions
|
|
#define MSG_ReadServerCmd( sb ) MSG_ReadCmd( sb, NS_SERVER )
|
|
#define MSG_ReadClientCmd( sb ) MSG_ReadCmd( sb, NS_CLIENT )
|
|
int MSG_ReadCmd( sizebuf_t *sb, netsrc_t type ); // message marker
|
|
int MSG_ReadChar( sizebuf_t *sb );
|
|
int MSG_ReadByte( sizebuf_t *sb );
|
|
int MSG_ReadShort( sizebuf_t *sb );
|
|
int MSG_ReadWord( sizebuf_t *sb );
|
|
int MSG_ReadLong( sizebuf_t *sb );
|
|
dword MSG_ReadDword( sizebuf_t *sb );
|
|
float MSG_ReadCoord( sizebuf_t *sb );
|
|
float MSG_ReadFloat( sizebuf_t *sb );
|
|
void MSG_ReadVec3Coord( sizebuf_t *sb, vec3_t fa );
|
|
void MSG_ReadVec3Angles( sizebuf_t *sb, vec3_t fa );
|
|
qboolean MSG_ReadBytes( sizebuf_t *sb, void *pOut, int nBytes );
|
|
char *MSG_ReadStringExt( sizebuf_t *sb, qboolean bLine );
|
|
|
|
#endif//NET_BUFFER_H
|