自学教程：C++ FindArg函数代码示例

void EvalSoundArgs (void){	int	t;#if USE_SDL_MIXER#	ifdef __macosx__void * volatile function_p = (void *)&(Mix_OpenAudio);if (function_p == NULL) {	// the SDL_mixer framework is not present,	// so regardless of what conf.h or d2x.ini says,	// we don't want to use SDL_mixer		gameOptions [0].sound.bUseSDLMixer = 0;	}else #	endif //__macosx__if ((t = FindArg ("-sdl_mixer")))	gameOptions [0].sound.bUseSDLMixer = NumArg (t, 1);#endif //USE_SDL_MIXERif ((t = FindArg ("-noredbook")))	gameOptions [0].sound.bUseRedbook = 0;#if USE_SDL_MIXERif (gameOptions [0].sound.bUseSDLMixer) {	if ((t = FindArg ("-hires_sound")))		gameOptions [0].sound.bHires [0] =		gameOptions [0].sound.bHires [1] = NumArg (t, 2);	}#endif}

void arch_init(){ // Initialise the library#ifdef __SDL__	arch_sdl_init();#endif#ifdef __SVGALIB__	arch_svgalib_init();#endif	if (!FindArg( "-nojoystick" ))  {		if (Inferno_verbose) printf( "/n%s", TXT_VERBOSE_6);		joy_init();	}	//added 06/09/99 Matt Mueller - fix nonetwork compile#ifdef NETWORK	//end addition -MM//added on 10/19/98 by Victor Rachels to add serial support (from DPH)    if(!(FindArg("-noserial")))     com_init();//end this section addition - Victor 	//added 06/09/99 Matt Mueller - fix nonetwork compile#endif	//end addition -MM     timer_init();    key_init();}

int dd_gfx_init(){	int i;		if (dd_gfx_initialized) return 1;	for (i = 0; i < MAX_GFX_BITMAPS; i++)		gfxBitmap[i].lpdds = NULL;	gfxBitmapHandleCur = 1;	atexit(dd_gfx_close);	if (FindArg("-disallowgfx")) dd_gfx_initialized = 0;	else if (FindArg("-forcegfx")) dd_gfx_initialized = 1;	else {		if (ddDriverCaps.hwcolorkey) 			logentry("Card supports HW colorkeying./n");		if (ddDriverCaps.hwbltstretch)			logentry("Card supports HW bitmap stretching./n");				if (ddDriverCaps.hwcolorkey) dd_gfx_initialized = 1;		else dd_gfx_initialized = 0;	}	return 0;}

void gamefont_init(){	int i;	if (Gamefont_installed) return;	Gamefont_installed = 1;	for (i=0;i<MAX_FONTS;i++){		Gamefonts[i]=NULL;		addfontconf(i,0,Gamefont_filenames_l[i]);		addfontconf(i,640,Gamefont_filenames_h[i]);	}//	addfontconf(640,"pc6x8.fnt");//	addfontconf(1024,"pc8x16.fnt");	if ((i=FindArg("-font320")))		addfontconf(4,320,Args[i+1]);	if ((i=FindArg("-font640")))		addfontconf(4,640,Args[i+1]);	if ((i=FindArg("-font800")))		addfontconf(4,800,Args[i+1]);	if ((i=FindArg("-font1024")))		addfontconf(4,1024,Args[i+1]);		gamefont_choose_game_font(grd_curscreen->sc_canvas.cv_bitmap.bm_w,grd_curscreen->sc_canvas.cv_bitmap.bm_h);		atexit( gamefont_close );}

void EvalDemoArgs (void){	int	t;if ((t = FindArg ("-revert_demos")))	gameOpts->demo.bRevertFormat = NumArg (t, 1);if ((t = FindArg ("-auto_demos")))	gameStates.app.bAutoDemos = NumArg (t, 1);}

int GrInit (void){	int mode = SM (800, 600);	int retcode, t;// Only do this function once!if (gameStates.gfx.bInstalled)	return -1;#ifdef OGL_RUNTIME_LOADOglInitLoadLibrary ();#endif/***/PrintLog ("   initializing SDL/n");#if !USE_IRRLICHTif (SDL_Init (SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0) {	PrintLog ("SDL library video initialisation failed: %s./n", SDL_GetError());	Error ("SDL library video initialisation failed: %s.", SDL_GetError());}#endif#if DBG	ogl.m_states.bFullScreen = 0;#elseif ((t = FindArg ("-fullscreen"))) {	/***/PrintLog ("   switching to fullscreen/n");	ogl.m_states.bFullScreen = NumArg (t, 1);	//GrToggleFullScreen();	}#endif/***/PrintLog ("   initializing internal texture list/n");textureManager.Init ();/***/PrintLog ("   allocating screen buffer/n");screen.Canvas ()->SetBuffer (NULL);// Set the mode.for (t = 0; scrSizes [t].x && scrSizes [t].y; t++)	if (FindArg (ScrSizeArg (scrSizes [t].x, scrSizes [t].y))) {		gameStates.gfx.bOverride = 1;		gameStates.gfx.nStartScrSize =		mode = SM (scrSizes [t].x, scrSizes [t].y);		gameStates.gfx.nStartScrMode = FindDisplayMode (mode);		break;		}if ((retcode = GrSetMode (mode)))	return retcode;gameStates.gfx.bInstalled = 1;InitGammaRamp ();//atexit(GrClose);/***/PrintLog ("   initializing OpenGL extensions/n");ogl.SetRenderQuality ();ogl.SetupExtensions ();ogl.DestroyDrawBuffer ();ogl.CreateDrawBuffer ();ogl.SetDrawBuffer (GL_BACK, 1);return 0;}

void EvalGameplayArgs (void){	int	t;if ((t = FindArg ("-noscreens")))	gameOpts->gameplay.bSkipBriefingScreens = NumArg (t, 1);if ((t = FindArg ("-secretsave")))	gameOptions [0].gameplay.bSecretSave = NumArg (t, 1);if ((t = FindArg ("-nobotai")))	gameStates.gameplay.bNoBotAI = NumArg (t, 1);}

void DoJoystickInit (){if (!FindArg ("-nojoystick")) {	JoyInit ();	if (FindArg ("-joyslow"))		JoySetSlowReading (JOY_SLOW_READINGS);	if (FindArg ("-joypolled"))		JoySetSlowReading (JOY_POLLED_READINGS);	if (FindArg ("-joybios"))		JoySetSlowReading (JOY_BIOS_READINGS);	}}

int state_save_all(int between_levels){	char filename[128], desc[DESC_LENGTH+1];	if ( Game_mode & GM_MULTI )	{#ifdef MULTI_SAVE		if ( FindArg( "-multisave" ) )			multi_initiate_save_game();		else#endif  			HUD_init_message( "Can't save in a multiplayer game!" );		return 0;	}	mprintf(( 0, "CL=%d, NL=%d/n", Current_level_num, Next_level_num ));		stop_time();	if (!state_get_save_file(filename,desc,0))	{		start_time();		return 0;	}			return state_save_all_sub(filename, desc, between_levels);}

char *GetIniFileName (char *fnIni, int bDebug){	int	i;if ((i = FindArg ("-ini")))	strncpy (fnIni, Args [i + 1], sizeof (fnIni) - 1);else {#if defined(__unix__)	FFS		ffs;	strcpy (fnIni, gameFolders.szHomeDir);	if (bDebug)		strcat (fnIni, "/.d2x-xl-dbg");	else		strcat (fnIni, "/.d2x-xl");	if (FFF (fnIni, &ffs, 0) <= 0) {#endif	strcpy (fnIni, gameFolders.szConfigDir);	if (*fnIni)		strcat (fnIni, "/");	if (bDebug)		strcat (fnIni, "d2xdebug.ini");	else		strcat (fnIni, "d2x.ini");#if defined(__unix__)   }#endif //!__unix__	}return fnIni;}

void EvalMusicArgs (void){	int	t;	char	*p;if ((t = FindArg ("-playlist")) && (p = pszArgList [t+1]))	songManager.LoadPlayList (p);if ((t = FindArg ("-introsong")) && (p = pszArgList [t+1]))	strncpy (songManager.IntroSong (), p, FILENAME_LEN);if ((t = FindArg ("-briefingsong")) && (p = pszArgList [t+1]))	strncpy (songManager.BriefingSong (), p, FILENAME_LEN);if ((t = FindArg ("-creditssong")) && (p = pszArgList [t+1]))	strncpy (songManager.CreditsSong (), p, FILENAME_LEN);if ((t = FindArg ("-menusong")) && (p = pszArgList [t+1]))	strncpy (songManager.MenuSong (), p, FILENAME_LEN);}

tBitmapIndex PiggyRegisterBitmap (grsBitmap *bmP, const char *name, int bInFile){	tBitmapIndex temp;	Assert (gameData.pig.tex.nBitmaps [gameStates.app.bD1Data] < MAX_BITMAP_FILES);if (strstr (name, "door13"))	name = name;temp.index = gameData.pig.tex.nBitmaps [gameStates.app.bD1Data];if (!bInFile) {#ifdef EDITOR	if (FindArg ("-macdata"))		swap_0_255 (bmP);#endif	if (!bBigPig)  		gr_bitmap_rle_compress (bmP);	nBitmapFilesNew++;	}strncpy (gameData.pig.tex.pBitmapFiles [gameData.pig.tex.nBitmaps [gameStates.app.bD1Data]].name, name, 12);HashTableInsert (bitmapNames + gameStates.app.bD1Mission, 						gameData.pig.tex.pBitmapFiles[gameData.pig.tex.nBitmaps [gameStates.app.bD1Data]].name, 						gameData.pig.tex.nBitmaps [gameStates.app.bD1Data]);gameData.pig.tex.pBitmaps [gameData.pig.tex.nBitmaps [gameStates.app.bD1Data]] = *bmP;if (!bInFile) {	bitmapOffsets [gameStates.app.bD1Data][gameData.pig.tex.nBitmaps [gameStates.app.bD1Data]] = 0;	gameData.pig.tex.bitmapFlags [gameStates.app.bD1Data][gameData.pig.tex.nBitmaps [gameStates.app.bD1Data]] = bmP->bmProps.flags;	}gameData.pig.tex.nBitmaps [gameStates.app.bD1Data]++;return temp;}

void RBAInit(){	if (initialised) return;	if (FindArg("-nocdrom")) return; 	if (SDL_Init(SDL_INIT_CDROM) < 0)	{		Warning("SDL library initialisation failed: %s.",SDL_GetError());		return;	}	if (SDL_CDNumDrives() == 0)	{		Warning("No cdrom drives found!/n");		return;	}	s_cd = SDL_CDOpen(0);	if (s_cd == NULL) {		Warning("Could not open cdrom for redbook audio!/n");		return;	}	SDL_CDStatus(s_cd); /* update the drive status */	atexit(RBAExit);	initialised = 1;}

void EvalInputArgs (void){	int	t;if ((t = FindArg ("-grabmouse")))	gameStates.input.bGrabMouse = NumArg (t, 1);}

int ShowTitleScreens (void){	int nPlayed = MOVIE_NOT_PLAYED;	//default is not nPlayed#if DBGif (FindArg ("-notitles"))	songManager.Play (SONG_TITLE, 1);else#endif {	//NOTE LINK TO ABOVE!	int bSongPlaying = 0;	if (movieManager.m_bHaveExtras) {		nPlayed = movieManager.Play ("starta.mve", MOVIE_REQUIRED, 0, gameOpts->movies.bResize);		if (nPlayed == MOVIE_ABORTED)			nPlayed = MOVIE_PLAYED_FULL;		else			nPlayed = movieManager.Play ("startb.mve", MOVIE_REQUIRED, 0, gameOpts->movies.bResize);		}	else {		movieManager.PlayIntro ();		}	if (!bSongPlaying)		songManager.Play (SONG_TITLE, 1);	}return (nPlayed != MOVIE_NOT_PLAYED);	//default is not nPlayed}

void OglInitAttributes (void){	int t;/***/LogErr ("setting OpenGL attributes/n");OglSetAttribute ("-gl_red", "SDL_GL_RED_SIZE", SDL_GL_RED_SIZE, 8);OglSetAttribute ("-gl_green", "SDL_GL_GREEN_SIZE", SDL_GL_GREEN_SIZE, 8);OglSetAttribute ("-gl_blue", "SDL_GL_BLUE_SIZE", SDL_GL_BLUE_SIZE, 8);OglSetAttribute ("-gl_alpha", "SDL_GL_ALPHA_SIZE", SDL_GL_ALPHA_SIZE, 8);OglSetAttribute ("-gl_buffer", "SDL_GL_BUFFER_SIZE", SDL_GL_BUFFER_SIZE, 32);OglSetAttribute ("-gl_stencil", "SDL_GL_STENCIL_SIZE", SDL_GL_STENCIL_SIZE, 8);if ((t = FindArg ("-gl_depth")) && Args [t+1]) {	gameStates.ogl.nDepthBits = atoi (Args [t + 1]);	if (gameStates.ogl.nDepthBits <= 0)		gameStates.ogl.nDepthBits = 24;	else if (gameStates.ogl.nDepthBits > 24)		gameStates.ogl.nDepthBits = 24;	OglSetAttribute (NULL, "SDL_GL_DEPTH_SIZE", SDL_GL_DEPTH_SIZE, gameStates.ogl.nDepthBits);	OglSetAttribute (NULL, "SDL_GL_STENCIL_SIZE", SDL_GL_STENCIL_SIZE, 8);	}OglSetAttribute (NULL, "SDL_GL_ACCUM_RED_SIZE", SDL_GL_ACCUM_RED_SIZE, 5);OglSetAttribute (NULL, "SDL_GL_ACCUM_GREEN_SIZE", SDL_GL_ACCUM_GREEN_SIZE, 5);OglSetAttribute (NULL, "SDL_GL_ACCUM_BLUE_SIZE", SDL_GL_ACCUM_BLUE_SIZE, 5);OglSetAttribute (NULL, "SDL_GL_ACCUM_ALPHA_SIZE", SDL_GL_ACCUM_ALPHA_SIZE, 5);OglSetAttribute (NULL, "SDL_GL_DOUBLEBUFFER", SDL_GL_DOUBLEBUFFER, 1);}

void digi_set_midi_volume( int mvolume ) { 	char buf[128];	if(FindArg("-nomusic"))		return;	sprintf(buf,"v%i",mvolume);	send_ipc(buf);}

	/* assume parameter following tag is hexadecimal (0x unnecessary) */	int LongHexArg( const char *tag, int deflt )	{	  const char *parm = FindArg( tag );	  if( parm )		return strtoul( parm, NULL, 16 );	  else		return deflt;	}

int CCommand::FindArgInt( const char *pName, int nDefaultVal ) const{	const char *pVal = FindArg( pName );	if ( pVal )		return atoi( pVal );	else		return nDefaultVal;}

	int LongArg( const char *tag, int deflt )	{	  const char *parm = FindArg( tag );	  if( parm )		return atol( parm );	  else		return deflt;	}

int com_init(void){//edited 02/06/99 Matt Mueller - allow selection of different devices char *modem=MODEMDEVICE; int t; if ((t = FindArg( "-serialdevice" ))) {	 modem=Args[t+1]; } //edited 03/05/99 Matt Mueller - allow reading from different device if ((t = FindArg( "-serialread" ))) {     char *readpipe=NULL;     readpipe=Args[t+1];     rfd=open(readpipe, O_RDONLY | O_NOCTTY | O_NONBLOCK);     if (rfd < 0) { perror(readpipe); return -1; } }else     rfd=-1;	      if (commlib_initialised) return -1; fd=open(modem, (rfd<0?O_RDWR:O_WRONLY) | O_NOCTTY); if (fd < 0) { perror(modem); return -1; } if (rfd<0)    rfd=fd; //end edit -MM//end edit -MM	     tcgetattr(fd, &oldtio); bzero(&newtio, sizeof(newtio));  newtio.c_cflag = BAUDRATE | CRTSCTS | CS8 | CLOCAL | CREAD; newtio.c_iflag = IGNPAR; newtio.c_oflag = 0; /* set input mode (non-canonical, no echo,...) */ newtio.c_lflag = 0;  newtio.c_cc[VTIME]    = 0;   /* inter-character timer unused */ newtio.c_cc[VMIN]     = 0;   /* don't block on reads */ tcflush(fd, TCIFLUSH); tcsetattr(fd, TCSANOW, &newtio);     atexit(com_done); commlib_initialised=1; return 0;}

void RBAInit(){	int	d, i, j;	char	szDrive [FILENAME_LEN], sz [FILENAME_LEN];	if (initialised) 	return;if (FindArg("-nocdrom")) 	return; if (SDL_Init(SDL_INIT_CDROM) < 0) {	Warning(TXT_SDL_INIT_LIB,SDL_GetError());	return;	}if ((j = SDL_CDNumDrives()) == 0) {	Warning(TXT_CDROM_NONE);	return;	}d = 0;if ((i = FindArg ("-cdrom")) && *Args [++i]) {#ifdef _WIN32	sprintf (szDrive, "%c://", *Args [i]);#else	strncpy (szDrive, Args [i], sizeof (szDrive));#endif	strlwr (szDrive);	for (i = 0; i < j; i++) {		strcpy (sz, SDL_CDName (i));		strlwr (sz);		if (!strcmp (szDrive, sz)) {			d = i;			break;			}		}	}if (!(s_cd = SDL_CDOpen(d))) {	Warning(TXT_CDROM_OPEN);	return;	}atexit(RBAExit);initialised = 1;}

void EvalMenuArgs (void){	int	t;if (!gameStates.app.bNostalgia) {	if ((t = FindArg ("-menustyle")))		gameOptions [0].menus.nStyle = NumArg (t, 1);	else		gameOptions [0].menus.nStyle = 1;	}if ((t = FindArg ("-fademenus")))	gameOptions [0].menus.nFade = NumArg (t, 0);if ((t = FindArg ("-altbg_alpha")) && *pszArgList [t+1]) {	gameOptions [0].menus.altBg.alpha = atof (pszArgList [t+1]);	if (gameOptions [0].menus.altBg.alpha < 0)		gameOptions [0].menus.altBg.alpha = -1.0;	else if ((gameOptions [0].menus.altBg.alpha == 0) || (gameOptions [0].menus.altBg.alpha > 1.0))		gameOptions [0].menus.altBg.alpha = 1.0;	}if ((t = FindArg ("-altbg_brightness")) && *pszArgList [t+1]) {	gameOptions [0].menus.altBg.brightness = atof (pszArgList [t+1]);	if ((gameOptions [0].menus.altBg.brightness <= 0) || (gameOptions [0].menus.altBg.brightness > 1.0))		gameOptions [0].menus.altBg.brightness = 1.0;	}if ((t = FindArg ("-altbg_grayscale")))	gameOptions [0].menus.altBg.grayscale = NumArg (t, 1);if ((t = FindArg ("-altbg_name")) && *pszArgList [t+1])	strncpy (gameOptions [0].menus.altBg.szName, pszArgList [t+1], sizeof (gameOptions [0].menus.altBg.szName));if ((t = FindArg ("-use_swapfile")))	gameStates.app.bUseSwapFile = NumArg (t, 1);}

int CCommand::FindIntArg( const char* pszArgument, const int iDefault ) const{	const char* pszValue = FindArg( pszArgument );	if( !pszValue )		return iDefault;	return atoi( pszValue );}

int OglVideoModeOK (int w, int h){int nColorBits = SDL_VideoModeOK (w, h, FindArg ("-gl_16bpp") ? 16 : 32, SDL_VIDEO_FLAGS);LogErr ("SDL suggests %d bits/pixel/n", nColorBits);if (!nColorBits)	return 0;gameStates.ogl.nColorBits = nColorBits;return 1;}

int IpxInit (int socket_number){	int i;if ((i = FindArg ("-ipxnetwork")) && pszArgList[i + 1]) {	ulong n = strtol (pszArgList[i + 1], NULL, 16);	for (i = 3; i >= 0; i--, n >>= 8)		ipx_MyAddress [i] = n & 0xff; 	}

void SongsInit (){	int	i, bD1Songs;	char	*p, inputline [81];	CFILE	cf;if (gameData.songs.bInitialized)	return;CFUseD1HogFile ("descent.hog");for (i = 0, bD1Songs = 0; bD1Songs < 2; bD1Songs++) {		if (!FindArg ("-nomixer"))			CD_blast_mixer ();   // Crank it!	if (CFExist ("descent.sng", gameFolders.szDataDir, bD1Songs)) {   // mac (demo?) datafiles don't have the .sng file		if (!CFOpen (&cf, "descent.sng", gameFolders.szDataDir, "rb", bD1Songs)) {			if (bD1Songs)				break;			else				Error ("Couldn't open descent.sng");			}		while (CFGetS (inputline, 80, &cf)) {			if ((p = strchr (inputline,'/n')))				*p = '/0';			if (*inputline) {				Assert(i < MAX_NUM_SONGS);				if (3 == sscanf (inputline, "%s %s %s",									  gameData.songs.info [i].filename,									  gameData.songs.info [i].melodicBankFile,									  gameData.songs.info [i].drumBankFile)) {					if (!gameData.songs.nFirstLevelSong [bD1Songs] && strstr (gameData.songs.info [i].filename, "game01.hmp"))						 gameData.songs.nFirstLevelSong [bD1Songs] = i;					if (bD1Songs && strstr (gameData.songs.info [i].filename, "endlevel.hmp"))						gameData.songs.nD1EndLevelSong = i;					i++;					}				}			}		gameData.songs.nSongs [bD1Songs] = i;		gameData.songs.nLevelSongs [bD1Songs] = gameData.songs.nSongs [bD1Songs] - gameData.songs.nFirstLevelSong [bD1Songs];		if (!gameData.songs.nFirstLevelSong [bD1Songs])			Error ("Descent 1 songs are missing.");		CFClose(&cf);		}	gameData.songs.nTotalSongs = i;	gameData.songs.bInitialized = 1;	//	RBA Hook	if (!gameOpts->sound.bUseRedbook)		gameStates.sound.bRedbookEnabled = 0;	else {	// use redbook			RBAInit ();		if (RBAEnabled ()) {			SetRedbookVolume(gameConfig.nRedbookVolume);			RBARegisterCD ();			}		}	atexit(RBAStop);    // stop song on exit	}}

void EvalMovieArgs (void){	int	t;if ((t = FindArg ("-nomovies"))) {	gameOptions [0].movies.nLevel = 2 - NumArg (t, 2);	if (gameOptions [0].movies.nLevel < 0)		gameOptions [0].movies.nLevel = 0;	else if (gameOptions [0].movies.nLevel > 2)		gameOptions [0].movies.nLevel = 2;	}if (FindArg ("-subtitles"))	gameOptions [0].movies.bSubTitles = NumArg (t, 1);if ((t = FindArg ("-movie_quality")))	gameOptions [0].movies.nQuality = NumArg (t, 0);if (gameData.multiplayer.autoNG.bValid)	gameOptions [0].movies.nLevel = 0;}

void EvalOglArgs (void){	int	t;#if DBGif ((t = FindArg ("-gl_alttexmerge")))	gameOpts->ogl.bGlTexMerge = NumArg (t, 1);#endifif ((t = FindArg ("-lowmem")))	ogl.m_states.bLowMemory = NumArg (t, 1);if ((t = FindArg ("-preload_textures")))	ogl.m_states.nPreloadTextures = NumArg (t, 3);else	ogl.m_states.nPreloadTextures = 5;if ((t = FindArg ("-FSAA")))	ogl.m_states.bFSAA = NumArg (t, 1);if ((t = FindArg ("-quad_buffering")))	ogl.m_states.bQuadBuffering = NumArg (t, 1);}

int OglSetAttribute (char *szSwitch, char *szAttr, SDL_GLattr attr, int value){	int	i;	if (szSwitch && (i = FindArg (szSwitch)) && Args [i + 1])	attr = (SDL_GLattr) atoi (Args [i + 1]);i = SDL_GL_SetAttribute (attr, value);/***/LogErr ("   setting %s to %d %s/n", szAttr, value, (i == -1) ? "failed" : "succeeded");return i;}