C++ Cvar_VariableValue函數代碼示例

/*
=======================
CL_SendConnectPacket

We have gotten a challenge from the server, so try and
connect.
======================
*/
void CL_SendConnectPacket (void)
{
	netadr_t	adr;
	int		port;

	if (!NET_StringToAdr (cls.servername, &adr))
	{
		Com_Printf ("Bad server address\n");
		cls.connect_time = 0;
		return;
	}
	if (adr.port == 0)
		adr.port = BigShort (PORT_SERVER);

	port = Cvar_VariableValue ("qport");
	userinfo_modified = false;

	Netchan_OutOfBandPrint (NS_CLIENT, adr, "connect %i %i %i \"%s\"\n",
		PROTOCOL_VERSION, port, cls.challenge, Cvar_Userinfo() );
}

void IN_Frame (void) {

  // bk001130 - from cvs 1.17 (mkv)
  IN_JoyMove(); // FIXME: disable if on desktop?

  if ( cls.keyCatchers & KEYCATCH_CONSOLE )
  {
    // temporarily deactivate if not in the game and
    // running on the desktop
    // voodoo always counts as full screen
    if (Cvar_VariableValue ("r_fullscreen") == 0
        && strcmp( Cvar_VariableString("r_glDriver"), _3DFX_DRIVER_NAME ) )
    {
      IN_DeactivateMouse ();
      return;
    }
  }

  IN_ActivateMouse();
}

/*
============
Cvar_Toggle_f

Toggles a cvar for easy single key binding, optionally through a list of
given values
============
*/
void Cvar_Toggle_f(void)
{
	int  i, c = Cmd_Argc();
	char *curval;

	if (c < 2)
	{
		Com_Printf("usage: toggle <variable> [value1, value2, ...]\n");
		return;
	}

	if (c == 2)
	{
		Cvar_Set2(Cmd_Argv(1), va("%d",
		                          !Cvar_VariableValue(Cmd_Argv(1))),
		          qfalse);
		return;
	}

	if (c == 3)
	{
		Com_Printf("toggle: nothing to toggle to\n");
		return;
	}

	curval = Cvar_VariableString(Cmd_Argv(1));

	// don't bother checking the last arg for a match since the desired
	// behaviour is the same as no match (set to the first argument)
	for (i = 2; i + 1 < c; i++)
	{
		if (strcmp(curval, Cmd_Argv(i)) == 0)
		{
			Cvar_Set2(Cmd_Argv(1), Cmd_Argv(i + 1), qfalse);
			return;
		}
	}

	// fallback
	Cvar_Set2(Cmd_Argv(1), Cmd_Argv(2), qfalse);
}

/*
=================
SV_CheckForSavegame
=================
*/
void SV_CheckForSavegame (void)
{
	char		name[MAX_OSPATH];
	FILE		*f;
	int			i;

	if (sv_noreload->value)
		return;

	if (Cvar_VariableValue ("deathmatch"))
		return;

	Com_sprintf (name, sizeof(name), "%s/save/current/%s.sav", FS_Gamedir(), sv.name);
	f = fopen (name, "rb");
	if (!f)
		return;		// no savegame

	fclose (f);

	SV_ClearWorld ();

	// get configstrings and areaportals
	SV_ReadLevelFile ();

	if (!sv.loadgame)
	{	// coming back to a level after being in a different
		// level, so run it for ten seconds

		// rlava2 was sending too many lightstyles, and overflowing the
		// reliable data. temporarily changing the server state to loading
		// prevents these from being passed down.
		server_state_t		previousState;		// PGM

		previousState = sv.state;				// PGM
		sv.state = ss_loading;					// PGM
		for (i=0 ; i<100 ; i++)
			ge->RunFrame ();

		sv.state = previousState;				// PGM
	}
}

/*
================
SVC_Status

Responds with all the info that qplug or qspy can see about the server
and all connected players.  Used for getting detailed information after
the simple info query.
================
*/
void SVC_Status( netadr_t from ) {
	char	player[1024];
	char	status[MAX_MSGLEN];
	int		i;
	client_t	*cl;
	playerState_t	*ps;
	int		statusLength;
	int		playerLength;
	char	infostring[MAX_INFO_STRING];

	// ignore if we are in single player
	if ( Cvar_VariableValue( "g_gametype" ) == GT_SINGLE_PLAYER ) {
		return;
	}

	strcpy( infostring, Cvar_InfoString( CVAR_SERVERINFO ) );

	// echo back the parameter to status. so master servers can use it as a challenge
	// to prevent timed spoofed reply packets that add ghost servers
	Info_SetValueForKey( infostring, "challenge", Cmd_Argv(1) );

	status[0] = 0;
	statusLength = 0;

	for (i=0 ; i < sv_maxclients->integer ; i++) {
		cl = &svs.clients[i];
		if ( cl->state >= CS_CONNECTED ) {
			ps = SV_GameClientNum( i );
			Com_sprintf (player, sizeof(player), "%i %i \"%s\"\n",
				ps->persistant[PERS_SCORE], cl->ping, cl->name);
			playerLength = strlen(player);
			if (statusLength + playerLength >= sizeof(status) ) {
				break;		// can't hold any more
			}
			strcpy (status + statusLength, player);
			statusLength += playerLength;
		}
	}

	NET_OutOfBandPrint( NS_SERVER, from, "statusResponse\n%s\n%s", infostring, status );
}

/*
===============
Host_Exec_f
===============
*/
void Host_Exec_f( void )
{
	string	cfgpath;
	char	*f, *txt; 
	size_t	len;

	if( Cmd_Argc() != 2 )
	{
		Msg( "Usage: exec <filename>\n" );
		return;
	}

	// HACKHACK: don't execute listenserver.cfg in singleplayer
	if( !Q_stricmp( Cvar_VariableString( "lservercfgfile" ),  Cmd_Argv( 1 )))
	{
		if( Cvar_VariableValue( "maxplayers" ) == 1.0f )
			return;
	}

	Q_strncpy( cfgpath, Cmd_Argv( 1 ), sizeof( cfgpath )); 
	FS_DefaultExtension( cfgpath, ".cfg" ); // append as default

	f = FS_LoadFile( cfgpath, &len, false );
	if( !f )
	{
		MsgDev( D_NOTE, "couldn't exec %s\n", Cmd_Argv( 1 ));
		return;
	}

	// adds \n\0 at end of the file
	txt = Z_Malloc( len + 2 );
	Q_memcpy( txt, f, len );
	Q_strncat( txt, "\n", len + 2 );
	Mem_Free( f );

	MsgDev( D_INFO, "execing %s\n", Cmd_Argv( 1 ));
	Cbuf_InsertText( txt );
	Mem_Free( txt );
}

/*
====================
NET_OpenIPX
====================
*/
void NET_OpenIPX (void)
{
	int		port;
	int		dedicated;

	dedicated = Cvar_VariableValue ("dedicated");

	if (!ipx_sockets[NS_SERVER])
	{
		port = Cvar_Get("ipx_hostport", "0", CVAR_NOSET)->value;
		if (!port)
		{
			port = Cvar_Get("hostport", "0", CVAR_NOSET)->value;
			if (!port)
			{
				port = Cvar_Get("port", va("%i", PORT_SERVER), CVAR_NOSET)->value;
			}
		}
		ipx_sockets[NS_SERVER] = NET_IPXSocket (port);
	}

	// dedicated servers don't need client ports
	if (dedicated)
		return;

	if (!ipx_sockets[NS_CLIENT])
	{
		port = Cvar_Get("ipx_clientport", "0", CVAR_NOSET)->value;
		if (!port)
		{
			port = Cvar_Get("clientport", va("%i", PORT_CLIENT), CVAR_NOSET)->value;
			if (!port)
				port = PORT_ANY;
		}
		ipx_sockets[NS_CLIENT] = NET_IPXSocket (port);
		if (!ipx_sockets[NS_CLIENT])
			ipx_sockets[NS_CLIENT] = NET_IPXSocket (PORT_ANY);
	}
}

void CL_InitUI( void ) {
	int		v;
	vmInterpret_t		interpret;

	// load the dll or bytecode
	interpret = Cvar_VariableValue("vm_ui");
	if(cl_connectedToPureServer)
	{
		// if sv_pure is set we only allow qvms to be loaded
		if(interpret != VMI_COMPILED && interpret != VMI_BYTECODE)
			interpret = VMI_COMPILED;
	}

	uivm = VM_Create( "ui", CL_UISystemCalls, interpret );
	if ( !uivm ) {
		Com_Error( ERR_FATAL, "VM_Create on UI failed" );
	}

	// sanity check
	v = VM_Call( uivm, UI_GETAPIVERSION );
	if (v == UI_OLD_API_VERSION) {
//		Com_Printf(S_COLOR_YELLOW "WARNING: loading old Quake III Arena User Interface version %d\n", v );
		// init for this gamestate
		VM_Call( uivm, UI_INIT, (clc.state >= CA_CONNECTING_NAT && clc.state < CA_ACTIVE));
	}
	else if (v != UI_API_VERSION) {
		// Free uivm now, so UI_SHUTDOWN doesn't get called later.
		VM_Free( uivm );
		uivm = NULL;

		Com_Error( ERR_DROP, "User Interface is version %d, expected %d", v, UI_API_VERSION );
		cls.uiStarted = qfalse;
	}
	else {
		// init for this gamestate
		VM_Call( uivm, UI_INIT, (clc.state >= CA_CONNECTING_NAT && clc.state < CA_ACTIVE) );
	}
}

/*
==================
SV_Auth_Ban_f

Ban a user from the server 
and the group
==================
*/
static void SV_Auth_Ban_f(void) {

    client_t    *cl;
    char        *d, *h, *m;

    if (!com_sv_running->integer) {
        Com_Printf("Server is not running.\n");
        return;
    }

    if (Cvar_VariableValue("auth") == 0) {
        Com_Printf("Auth services are disabled\n");
        return;
    }

    if (Cmd_Argc() < 5) {
        Com_Printf ("Usage: auth-ban <client> <days> <hours> <mins>\n");
        return;
    }

    cl = SV_GetPlayerByHandle();

    if (!cl) {
        return;
    }

    if (cl->netchan.remoteAddress.type == NA_LOOPBACK) {
        SV_SendServerCommand(NULL, "print \"%s\"", "Cannot ban host client\n");
        return;
    }

    d = Cmd_Argv(2);
    h = Cmd_Argv(3);
    m = Cmd_Argv(4);

    VM_Call(gvm, GAME_AUTH_BAN, (int)(cl - svs.clients), atoi(d), atoi(h), atoi(m));

}

/*
============
Cvar_Toggle_f

Toggles a cvar for easy single key binding,
optionally through a list of given values
============
*/
void Cvar_Toggle_f( void )
{
    int        i, c;
    const char *varname, *curval;

    c = Cmd_Argc();

    if ( c < 2 )
    {
        Cmd_PrintUsage(_("<variable> [<value> …]"), NULL);
        return;
    }

    varname = Cmd_Argv( 1 );

    if ( c == 2 )
    {
        Cvar_Set2( varname, va( "%d", !Cvar_VariableValue( varname ) ), qfalse );
        return;
    }

    curval = Cvar_VariableString( Cmd_Argv( 1 ) );

    // don't bother checking the last value for a match, since the desired
    //  behaviour is the same as if the last value didn't match:
    //  set the variable to the first value
    for ( i = 2; i < c - 1; ++i )
    {
        if ( !strcmp( curval, Cmd_Argv( i ) ) )
        {
            Cvar_Set2( varname, Cmd_Argv( i + 1 ), qfalse );
            return;
        }
    }

    // fallback
    Cvar_Set2( varname, Cmd_Argv( 2 ), qfalse );
}

void Cvar_Cycle_f (void)
{
	int i;

	if (Cmd_Argc() < 3)
	{
		Con_Printf("cycle <cvar> <value list>: cycle cvar through a list of values\n");
		return;
	}

	//loop through the args until you find one that matches the current cvar value.
	//yes, this will get stuck on a list that contains the same value twice.
	//it's not worth dealing with, and i'm not even sure it can be dealt with.

	for (i=2;i<Cmd_Argc();i++)
	{
		//zero is assumed to be a string, even though it could actually be zero.  The worst case
		//is that the first time you call this command, it won't match on zero when it should, but after that,
		//it will be comparing strings that all had the same source (the user) so it will work.
		if (atof(Cmd_Argv(i)) == 0)
		{
			if (!strcmp(Cmd_Argv(i), Cvar_VariableString(Cmd_Argv(1))))
				break;
		}
		else
		{
			if (atof(Cmd_Argv(i)) == Cvar_VariableValue(Cmd_Argv(1)))
				break;
		}
	}

	if (i == Cmd_Argc())
		Cvar_Set (Cmd_Argv(1), Cmd_Argv(2)); // no match
	else if (i + 1 == Cmd_Argc())
		Cvar_Set (Cmd_Argv(1), Cmd_Argv(2)); // matched last value in list
	else
		Cvar_Set (Cmd_Argv(1), Cmd_Argv(i+1)); // matched earlier in list
}

void SV_Nextserver(void)
{
    char * v;

    //ZOID, ss_pic can be nextserver'd in coop mode
    if (sv.state == ss_game || (sv.state == ss_pic && !Cvar_VariableValue("coop")))
    {
        return; // can't nextserver while playing a normal game
    }

    svs.spawncount++; // make sure another doesn't sneak in
    v = Cvar_VariableString("nextserver");
    if (!v[0])
    {
        Cbuf_AddText("killserver\n");
    }
    else
    {
        Cbuf_AddText(v);
        Cbuf_AddText("\n");
    }
    Cvar_Set("nextserver", "");
}

/*
=================
R_CalcEntAlpha
=================
*/
float R_CalcEntAlpha (float alpha, vec3_t point)
{
	float	baseDist, newAlpha;
	vec3_t	vert_len;

	newAlpha = alpha;

	if (!(currententity->renderfx & RF2_CAMERAMODEL) || !(currententity->flags & RF_TRANSLUCENT))
	{
		newAlpha = max(min(newAlpha, 1.0f), 0.0f);
		return newAlpha;
	}

	baseDist = Cvar_VariableValue("cg_thirdperson_dist");
	if (baseDist < 1)	baseDist = 50;
	VectorSubtract(r_newrefdef.vieworg, point, vert_len);
	newAlpha *= VectorLength(vert_len) / baseDist;
	if (newAlpha > alpha)	newAlpha = alpha;

	newAlpha = max(min(newAlpha, 1.0f), 0.0f);

	return newAlpha;
}

/*	Monsters freefall when they don't have a ground entity, otherwise
	all movement is done with discrete steps.

	This is also used for objects that have become still on the ground, but
	will fall if the floor is pulled out from under them.
*/
void Physics_Step(edict_t *ent)
{
	// Freefall if not onground
	if(!(ent->v.flags & (FL_ONGROUND|FL_FLY|FL_SWIM)))
	{
#if 0
		// [19/3/2013] TODO: Replace! ~hogsy
		if(ent->v.velocity[2] < Cvar_VariableValue("server_gravityamount")*-0.1f)	//sv_gravity.value*-0.1f)
			bHitSound = true;
#endif

		Game->Physics_SetGravity(ent);
		Game->Physics_CheckVelocity(ent);

		SV_FlyMove(ent,host_frametime,NULL);
		SV_LinkEdict(ent,true);
	}

	// Regular thinking
	Server_RunThink(ent);

	Game->Physics_CheckWaterTransition(ent);
}

void CL_InitUI( void ) {
	int		v;
	vmInterpret_t		interpret;

	// load the dll or bytecode
	if ( cl_connectedToPureServer != 0 ) {
		// if sv_pure is set we only allow qvms to be loaded
		interpret = VMI_COMPILED;
	}
	else {
		interpret = Cvar_VariableValue( "vm_ui" );
	}
	uivm = VM_Create( "ui", CL_UISystemCalls, interpret );
	if ( !uivm ) {
		Com_Error( ERR_FATAL, "VM_Create on UI failed" );
	}

	// sanity check
	v = VM_Call( uivm, UI_GETAPIVERSION );
	if (v == UI_OLD_API_VERSION) {
//		Com_Printf(S_COLOR_YELLOW "WARNING: loading old Quake III Arena User Interface version %d\n", v );
		// init for this gamestate
		VM_Call( uivm, UI_INIT, (cls.state >= CA_AUTHORIZING && cls.state < CA_ACTIVE));
	}
	else if (v != UI_API_VERSION) {
		Com_Error( ERR_DROP, "User Interface is version %d, expected %d", v, UI_API_VERSION );
		cls.uiStarted = qfalse;
	}
	else {
		// init for this gamestate
		VM_Call( uivm, UI_INIT, (cls.state >= CA_AUTHORIZING && cls.state < CA_ACTIVE) );
	}

	// reset any CVAR_CHEAT cvars registered by ui
	if ( !clc.demoplaying && !cl_connectedToCheatServer ) 
		Cvar_SetCheatState();
}