C++ COM_CheckParm函数代码示例

/*
===============
R_InitParticles
===============
*/
void R_InitParticles (void)
{
	int		i;

	i = COM_CheckParm ("-particles");

	if (i)
	{
		r_numparticles = (int)(Q_atoi(com_argv[i+1]));
		if (r_numparticles < ABSOLUTE_MIN_PARTICLES)
			r_numparticles = ABSOLUTE_MIN_PARTICLES;
	}
	else
	{
		r_numparticles = MAX_PARTICLES;
	}

	particles = (particle_t *)
			Hunk_AllocName (r_numparticles * sizeof(particle_t), "particles");
}

/*
================
Sys_InitFloatTime
================
*/
void Sys_InitFloatTime(void)
{
	int		j;

	Sys_FloatTime();

	oldtime = curtime;

	j = COM_CheckParm("-starttime");

	if (j)
	{
		curtime = (double)(Q_atof(com_argv[j+1]));
	}
	else
	{
		curtime = 0.0;
	}
	lastcurtime = curtime;
}

void InitHWGamma (void)
{
#ifdef USE_VMODE
    int xf86vm_gammaramp_size;

    if (COM_CheckParm("-nohwgamma"))
        return;

    XF86VidModeGetGammaRampSize(x_disp, scrnum, &xf86vm_gammaramp_size);

    vid_gammaworks = (xf86vm_gammaramp_size == 256);

    if (vid_gammaworks)
    {
        XF86VidModeGetGammaRamp(x_disp,scrnum,xf86vm_gammaramp_size,
                                systemgammaramp[0], systemgammaramp[1], systemgammaramp[2]);
    }
    vid_hwgamma_enabled = vid_hwgammacontrol.value && vid_gammaworks; // && fullscreen?
#endif
}

/*
===============
R_InitParticles
===============
*/
void R_InitParticles (void)
{
	int		i;
	FILE	*f;

	i = COM_CheckParm ("-particles");

	MyTable[0] = 254;

	if (i)
	{
		r_numparticles = (int)(atoi(com_argv[i+1]));
		if (r_numparticles < ABSOLUTE_MIN_PARTICLES)
			r_numparticles = ABSOLUTE_MIN_PARTICLES;
	}
	else
	{
		r_numparticles = MAX_PARTICLES;
	}

	particles = (particle_t *)
			Hunk_AllocName (r_numparticles * sizeof(particle_t), "particles");

	Cvar_RegisterVariable (&leak_color);

	//JFM: snow test
	Cvar_RegisterVariable (&snow_flurry);
	Cvar_RegisterVariable (&snow_active);

	transTable = (byte *)malloc(65536);
	if (!transTable)
		Sys_Error ("Couldn't load gfx/tinttab.lmp");

	COM_FOpenFile ("gfx/tinttab.lmp", &f, false);	

	if (f)
	{
		fread(transTable,1,65536,f);
		fclose(f);
	}
}	

/*
===================
CFG_ReadCvarOverrides

convenience function, reading the "+" command line override
values of cvars in the given list. doesn't do anything with
the config file.
===================
*/
void CFG_ReadCvarOverrides (const char **vars, int num_vars)
{
	char	buff[64];
	int		i, j;

	if (num_vars < 1)
		return;

	buff[0] = '+';

	for (i = 0; i < num_vars; i++)
	{
		q_strlcpy (&buff[1], vars[i], sizeof(buff) - 1);
		j = COM_CheckParm(buff);
		if (j != 0 && j < com_argc - 1)
		{
			if (com_argv[j + 1][0] != '-' && com_argv[j + 1][0] != '+')
				Cvar_Set(vars[i], com_argv[j + 1]);
		}
	}
}

void
IN_Init(void)
{
#ifdef USE_XF86DGA
    int MajorVersion, MinorVersion;
#endif
    keyboard_grab_active = false;
    mouse_grab_active = false;

    // FIXME - do proper detection?
    //       - Also, look at other vid_*.c files for clues
    mouse_available = (COM_CheckParm("-nomouse")) ? false : true;

    if (x_disp == NULL)
	Sys_Error("x_disp not initialised before input...");

#ifdef USE_XF86DGA
    dga_mouse_active = false;
    if (!XF86DGAQueryVersion(x_disp, &MajorVersion, &MinorVersion)) {
	Con_Printf("Failed to detect XF86DGA Mouse\n");
	in_dgamouse.value = 0;
	dga_available = false;
    } else {
	dga_available = true;
    }
#endif

    // Need to grab the input focus at startup, just in case...
    // FIXME - must be viewable or get BadMatch
    XSetInputFocus(x_disp, x_win, RevertToParent, CurrentTime);

    IN_InitCvars();

    if (VID_IsFullScreen()) {
	if (!mouse_grab_active)
	    IN_GrabMouse();
	if (!keyboard_grab_active)
	    IN_GrabKeyboard();
    }
}

/*
================
VID_Init
================
*/
void    VID_Init (unsigned char *palette)
{
	vid_mode = Cvar_Get("vid_mode", "0", CVAR_NONE, "None");
	vid_wait = Cvar_Get("vid_wait", "0", CVAR_NONE, "None");
	vid_nopageflip = Cvar_Get("vid_nopageflip", "0", CVAR_ARCHIVE, "None");
	_vid_wait_override = Cvar_Get("_vid_wait_override", "0", CVAR_ARCHIVE, "None");
	_vid_default_mode = Cvar_Get("_vid_default_mode", "0", CVAR_ARCHIVE, "None");
	_vid_default_mode_win = Cvar_Get("_vid_default_mode_win", "3", CVAR_ARCHIVE, "None");
	vid_config_x = Cvar_Get("vid_config_x", "800", CVAR_ARCHIVE, "None");
	vid_config_y = Cvar_Get("vid_config_y", "600", CVAR_ARCHIVE, "None");
	vid_stretch_by_2 = Cvar_Get("vid_stretch_by_2", "1", CVAR_ARCHIVE, "None");
	_windowed_mouse = Cvar_Get("_windowed_mouse", "0", CVAR_ARCHIVE, "None");
	vid_fullscreen_mode = Cvar_Get("vid_fullscreen_mode", "3", CVAR_ARCHIVE, "None");
	vid_windowed_mode = Cvar_Get("vid_windowed_mode", "0", CVAR_ARCHIVE, "None");
	block_switch = Cvar_Get("block_switch", "0", CVAR_ARCHIVE, "None");

	Cmd_AddCommand ("vid_testmode", VID_TestMode_f);
	Cmd_AddCommand ("vid_nummodes", VID_NumModes_f);
	Cmd_AddCommand ("vid_describecurrentmode", VID_DescribeCurrentMode_f);
	Cmd_AddCommand ("vid_describemode", VID_DescribeMode_f);
	Cmd_AddCommand ("vid_describemodes", VID_DescribeModes_f);

// set up the mode list; note that later inits link in their modes ahead of
// earlier ones, so the standard VGA modes are always first in the list. This
// is important because mode 0 must always be VGA mode 0x13
	if (!COM_CheckParm ("-stdvid"))
		VID_InitExtra ();
	VGA_Init ();

	vid_testingmode = 0;

	vid_modenum = vid_mode->int_val;

	VID_SetMode (vid_modenum, palette);

	vid_realmode = vid_modenum;
	
	vid_menudrawfn = VID_MenuDraw;
	vid_menukeyfn = VID_MenuKey;
}

/*
================
VID_Init
================
*/
void    VID_Init (unsigned char *palette)
{
	Cvar_RegisterVariable (&vid_mode);
	Cvar_RegisterVariable (&vid_wait);
	Cvar_RegisterVariable (&vid_nopageflip);
	Cvar_RegisterVariable (&_vid_wait_override);
	Cvar_RegisterVariable (&_vid_default_mode);
	Cvar_RegisterVariable (&_vid_default_mode_win);
	Cvar_RegisterVariable (&vid_config_x);
	Cvar_RegisterVariable (&vid_config_y);
	Cvar_RegisterVariable (&vid_stretch_by_2);
	Cvar_RegisterVariable (&_windowed_mouse);
	Cvar_RegisterVariable (&vid_fullscreen_mode);
	Cvar_RegisterVariable (&vid_windowed_mode);
	Cvar_RegisterVariable (&block_switch);

	Cmd_AddCommand ("vid_testmode", VID_TestMode_f);
	Cmd_AddCommand ("vid_nummodes", VID_NumModes_f);
	Cmd_AddCommand ("vid_describecurrentmode", VID_DescribeCurrentMode_f);
	Cmd_AddCommand ("vid_describemode", VID_DescribeMode_f);
	Cmd_AddCommand ("vid_describemodes", VID_DescribeModes_f);

// set up the mode list; note that later inits link in their modes ahead of
// earlier ones, so the standard VGA modes are always first in the list. This
// is important because mode 0 must always be VGA mode 0x13
	if (!COM_CheckParm ("-stdvid"))
		VID_InitExtra ();
	VGA_Init ();

	vid_testingmode = 0;

	vid_modenum = vid_mode.value;

	VID_SetMode (vid_modenum, palette);

	vid_realmode = vid_modenum;
	
	vid_menudrawfn = VID_MenuDraw;
	vid_menukeyfn = VID_MenuKey;
}

int UDP_Init (void)
{
	struct hostent *local;
	char	buff[MAXHOSTNAMELEN];
	struct qsockaddr addr;
	char *colon;

	if (COM_CheckParm ("-noudp"))
		return -1;

	// determine my name & address
	gethostname(buff, MAXHOSTNAMELEN);
	local = gethostbyname(buff);
	myAddr = *(int *)local->h_addr_list[0];

	// if the quake hostname isn't set, set it to the machine name
	if (Q_strcmp(hostname.string, "UNNAMED") == 0)
	{
		buff[15] = 0;
		Cvar_Set ("hostname", buff);
	}

	if ((net_controlsocket = UDP_OpenSocket (0)) == -1)
		Sys_Error("UDP_Init: Unable to open control socket\n");

	((struct sockaddr_in *)&broadcastaddr)->sin_family = AF_INET;
	((struct sockaddr_in *)&broadcastaddr)->sin_addr.s_addr = INADDR_BROADCAST;
	((struct sockaddr_in *)&broadcastaddr)->sin_port = htons(net_hostport);

	UDP_GetSocketAddr (net_controlsocket, &addr);
	Q_strcpy(my_tcpip_address,  UDP_AddrToString (&addr));
	colon = Q_strrchr (my_tcpip_address, ':');
	if (colon)
		*colon = 0;

	Con_Printf("UDP Initialized\n");
	tcpipAvailable = true;

	return net_controlsocket;
}

/*
=============
Sys_Init
 
Quake calls this so the system can register variables before host_hunklevel
is marked
=============
*/
void Sys_Init (void)
{
	qbool	WinNT;
	OSVERSIONINFO	vinfo;

	// make sure the timer is high precision, otherwise
	// NT gets 18ms resolution
	timeBeginPeriod( 1 );

	vinfo.dwOSVersionInfoSize = sizeof(vinfo);

	if (!GetVersionEx (&vinfo))
		Sys_Error ("Couldn't get OS info");

	if (vinfo.dwMajorVersion < 4 || vinfo.dwPlatformId == VER_PLATFORM_WIN32s)
		Sys_Error (SERVER_NAME " requires at least Win95 or NT 4.0");

	WinNT = (vinfo.dwPlatformId == VER_PLATFORM_WIN32_NT ? true : false);

	Cvar_Register (&sys_nostdout);
	Cvar_Register (&sys_sleep);

	if (COM_CheckParm ("-nopriority"))
	{
		Cvar_Set (&sys_sleep, "0");
	}
	else
	{
		if ( ! SetPriorityClass (GetCurrentProcess(), HIGH_PRIORITY_CLASS))
			Con_Printf ("SetPriorityClass() failed\n");
		else
			Con_Printf ("Process priority class set to HIGH\n");

		// sys_sleep > 0 seems to cause packet loss on WinNT (why?)
		if (WinNT)
			Cvar_Set (&sys_sleep, "0");
	}

	Sys_InitDoubleTime ();
}

static void S_InitSys (void)
{
	if (safemode || COM_CheckParm("-nosound") || COM_CheckParm("-s"))
		snd_system = S_SYS_NULL;

#if HAVE_SDL_SOUND
	else if (COM_CheckParm ("-sndsdl"))
		snd_system = S_SYS_SDL;
#endif

#if HAVE_ALSA_SOUND
	else if (COM_CheckParm ("-sndalsa"))
		snd_system = S_SYS_ALSA;
#endif

#if HAVE_OSS_SOUND
	else if (COM_CheckParm ("-sndoss"))
		snd_system = S_SYS_OSS;
#endif

#if HAVE_SUN_SOUND
	else if (COM_CheckParm ("-sndsun") || COM_CheckParm ("-sndbsd"))
		snd_system = S_SYS_SUN;
#endif

	else
#if HAVE_WIN_SOUND
		snd_system = S_SYS_WIN;
#elif HAVE_DOS_SOUND
		snd_system = S_SYS_DOS;
#elif HAVE_OSS_SOUND
		snd_system = S_SYS_OSS;
#elif HAVE_SUN_SOUND
		snd_system = S_SYS_SUN;
#elif HAVE_ALSA_SOUND
		snd_system = S_SYS_ALSA;
#elif HAVE_SDL_SOUND
		snd_system = S_SYS_SDL;
#else
		snd_system = S_SYS_NULL;
#endif
}

/*
================
Con_Init
================
*/
void Con_Init (void)
{
	con_debuglog = COM_CheckParm("-condebug");

	con = &con_main;
	con_linewidth = -1;
	Con_CheckResize ();
	
	Con_Printf ("Console initialized.\n");

//
// register our commands
//
	Cvar_RegisterVariable (&con_notifytime);

	Cmd_AddCommand ("toggleconsole", Con_ToggleConsole_f);
	Cmd_AddCommand ("togglechat", Con_ToggleChat_f);
	Cmd_AddCommand ("messagemode", Con_MessageMode_f);
	Cmd_AddCommand ("messagemode2", Con_MessageMode2_f);
	Cmd_AddCommand ("clear", Con_Clear_f);
	con_initialized = true;
}

void Rulesets_Init (void)
{
	int temp;

	Cvar_Register (&ruleset);

	if ((temp = COM_CheckParm ("-ruleset")) && temp + 1 < COM_Argc()) {
		if (!strcasecmp (COM_Argv(temp + 1), "smackdown")) {
			Cvar_Set (&ruleset, "smackdown");
			return;
		} else if (!strcasecmp (COM_Argv(temp + 1), "mtfl")) {
			Cvar_Set (&ruleset, "mtfl");
			return;
		} else if (strcasecmp (COM_Argv(temp + 1), "default")){
			Cvar_Set (&ruleset, "default");
			return;
		} else {
			Rulesets_Default ();
			return;
		}
	}
}

/*
================
Sys_InitTime
================
*/
static void Sys_InitTime (void)
{
#if !USE_UCLOCK_TIME
	int		j;

	Sys_DoubleTime ();

	oldtime = curtime;

	j = COM_CheckParm("-starttime");

	if (j && j < com_argc - 1)
	{
		curtime = (double) (atof(com_argv[j+1]));
	}
	else
	{
		curtime = 0.0;
	}
	lastcurtime = curtime;
#endif	/* ! USE_UCLOCK_TIME */
}

/*
===============
Host_SaveConfig_f

Writes key bindings and archived cvars to config.cfg
===============
*/
static void Host_SaveConfig_to(const char *file)
{
	qfile_t *f;

// dedicated servers initialize the host but don't parse and set the
// config.cfg cvars
	// LordHavoc: don't save a config if it crashed in startup
	if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
	{
		f = FS_OpenRealFile(file, "wb", false);
		if (!f)
		{
			Con_Printf("Couldn't write %s.\n", file);
			return;
		}

		Key_WriteBindings (f);
		Cvar_WriteVariables (f);

		FS_Close (f);
	}
}