自学教程：C++ ARGF函数代码示例

intmain(int argc, char *argv[]) {	prog = argv[0];	fps_flag = (getenv("FPS") != NULL);	load_config("lsc");	init_font_locale(lookup("locale", 0, 0));	srandom(0);	set_screen_size(SCREEN_WIDTH, SCREEN_HEIGHT);	layout_screen();	init_polar();	init_transforms();	init_video_in();	init_display(argc, argv, prog);	set_category(primary_buttons[Cat_change_color].b);	gettimeofday(&last_busy, 0);	ARGBEGIN {	case 'd':	debug++;			break;	case 'g':	grabtimeout = atoi(ARGF());	break;	case 'i':	idletime = atoi(ARGF());	break;	default:		return usage();	} ARGEND;	if (grabtimeout != 0 && grabtimeout < ALARMTIME) {		fprintf(stderr, "unreasonable grab time limit/n");		exit(14);	}	state = Live;	io_main_loop();	return 0;}

voidmain(int argc, char *argv[]){	char *p;	int c;	thechar = '5';	thestring = "arm";	ensuresymb(NSYMB);	memset(debug, 0, sizeof(debug));	cinit();	outfile = 0;	setinclude(".");	ARGBEGIN {	default:		c = ARGC();		if(c >= 0 || c < sizeof(debug))			debug[c] = 1;		break;	case 'o':		outfile = ARGF();		break;	case 'D':		p = ARGF();		if(p) {			if (nDlist%8 == 0) 				Dlist = allocn(Dlist, nDlist*sizeof(char *), 					8*sizeof(char *));			Dlist[nDlist++] = p;		}		break;	case 'I':		p = ARGF();		setinclude(p);		break;	case 't':		thechar = 't';		thestring = "thumb";		break;	} ARGEND	if(*argv == 0) {		print("usage: %ca [-options] file.s/n", thechar);		errorexit();	}	if(argc > 1){		print("can't assemble multiple files/n");		errorexit();	}	if(assemble(argv[0]))		errorexit();	exits(0);}

voidmain(int argc, char **argv){	int stdio;	stdio = 0;	ARGBEGIN{	case 'D':		++chatty9p;		break;	case 'v':		++chatty;		break;	case 'f':		deffile = ARGF();		break;	case 'g':		gidfile(ARGF());		break;	case 'p':		uidfile(ARGF());		break;	case 's':		stdio = 1;		break;	case 'r':		rdonly = 1;		break;	default:		usage();	}ARGEND	if(argc == 0)		srvfile = "ext2";	else if(argc == 1)		srvfile = argv[0];	else		usage();		iobuf_init();	/*notify(handler);*/	if(!chatty){		close(2);		open("#c/cons", OWRITE);	}	if(stdio){		srv(&ext2srv);	}else{		chat("%s %d: serving %s/n", argv0, getpid(), srvfile);		postmountsrv(&ext2srv, srvfile, 0, 0);	}	exits(0);}

voidmain(int argc, char *argv[]){	Biobuf bout;	Memimage *i;	int fd;	char *err, *filename;	ImageInfo II;	ARGBEGIN{	case 'c':		II.comment = ARGF();		if(II.comment == nil)			usage();		II.fields_set |= II_COMMENT;		break;	case 'g':		II.gamma = atof(ARGF());		if(II.gamma == 0.)			usage();		II.fields_set |= II_GAMMA;		break;	case 't':		break;	default:		usage();	}ARGEND	if(Binit(&bout, 1, OWRITE) < 0)		sysfatal("Binit failed: %r");	memimageinit();	if(argc == 0){		fd = 0;		filename = "<stdin>";	}else{		fd = open(argv[0], OREAD);		if(fd < 0)			sysfatal("can't open %s: %r", argv[0]);		filename = argv[0];	}	i = readmemimage(fd);	if(i == nil)		sysfatal("can't readimage %s: %r", filename);	close(fd);	err = memwritepng(&bout, i, &II);	freememimage(i);	if(err != nil)		fprint(2, "topng: %s/n", err);	exits(err);}

voidmain(int argc, char*argv[]){	char *p;	Place pl;	int newbaud;	newbaud = -1;	pl = nowhere;	ARGBEGIN {	default:		fprint(2, "usage: %s [-b baud] [-d device] [-l longitude latitude] [-n newbaud]/n", argv0);		exits("usage");	case 'D':		debug++;		break;	case 'b':		baud = strtol(ARGF(), nil, 0);		break;	case 'd':		serial = ARGF();		break;	case 'l':		p = ARGF();		if(strtolatlon(p, &p, &pl) < 0)			sysfatal("bad position");		while(*p == ' ' || *p == '/t' || *p == '/n')			p++;		if(*p == '/0')			p = ARGF();		if (strtolatlon(p, &p, &pl) < 0)			sysfatal("bad position");		while(*p == ' ' || *p == '/t' || *p == '/n')			p++;		if(*p != '/0')			sysfatal("trailing gunk in position");		where = pl;		break;	case 'n':		newbaud = strtol(ARGF(), nil, 0);		break;	} ARGEND	if(newbaud < 0)		newbaud = baud;	fmtinstall('L', placeconv);	print("Initializing GPS to %d baud, at %L, time %s/n",		newbaud, where, ctime(time(nil)));	setline();	evermore80(where, newbaud);}

voidmain(int argc, char *av[]){	int i;	char *f;	argv = av;	Binit(&bout, 1, OWRITE);	ARGBEGIN{	case 'w':		wordflag = YES;		break;	case '_':		wordflag = YES;		underscoreflag = YES;		break;	case 'm':		msflag = YES;		if(f = ARGF())			switch(*f)			{			case 'm':	mac = MM; break;			case 's':	mac = MS; break;			case 'l':	disp = 1; break;			default:	usage();			}		else			usage();		break;	case 'i':		iflag = YES;		break;	default:		usage();	}ARGEND	if(*argv)		infile = opn(*argv++);	else{		infile = malloc(sizeof(Biobuf));		Binit(infile, 0, OREAD);	}	files[0] = infile;	filesp = &files[0];	for(i='a'; i<='z' ; ++i)		chars[i] = LETTER;	for(i='A'; i<='Z'; ++i)		chars[i] = LETTER;	for(i='0'; i<='9'; ++i)		chars[i] = DIGIT;	chars['/''] = APOS;	chars['&'] = APOS;	chars['/b'] = APOS;	chars['.'] = PUNCT;	chars[','] = PUNCT;	chars[';'] = PUNCT;	chars['?'] = PUNCT;	chars[':'] = PUNCT;	work();}

voidmain(int argc, char **argv){	int len;	uchar *cert;	ulong valid[2];	RSApriv *key;	fmtinstall('B', mpfmt);	fmtinstall('H', encodefmt);	valid[0] = time(0);	valid[1] = valid[0] + 3*366*24*60*60;	ARGBEGIN{	default:		usage();	case 'e':		valid[1] = valid[0] + strtoul(ARGF(), 0, 10);		break;	}ARGEND	if(argc != 1 && argc != 2)		usage();	if((key = getkey(argc-1, argv+1, 1, nil)) == nil)		sysfatal("%r");	cert = X509gen(key, argv[0], valid, &len);	if(cert == nil)		sysfatal("X509gen: %r");	write(1, cert, len);	exits(0);}

static intxread(int argc, char *argv[]) {	IxpCFid *fid;	char *file, *buf;	int count;	ARGBEGIN{	default:		usage();	}ARGEND;	if(argc == 0)		usage();	file = EARGF(usage());	do {		fid = ixp_open(client, file, P9_OREAD);		if(fid == nil)			fatal("Can't open file '%s': %r/n", file);		buf = emalloc(fid->iounit);		while((count = ixp_read(fid, buf, fid->iounit)) > 0)			write(1, buf, count);		ixp_close(fid);		if(count == -1)			fprint(2, "%s: cannot read file '%s': %r/n", argv0, file);	} while((file = ARGF()));	return 0;}

static intxawrite(int argc, char *argv[]) {	IxpCFid *fid;	char *file, *buf;	int nbuf, i;	ARGBEGIN{	default:		usage();	}ARGEND;	file = EARGF(usage());	fid = ixp_open(client, file, P9_OWRITE);	if(fid == nil)		fatal("Can't open file '%s': %r/n", file);	nbuf = 1;	for(i=0; i < argc; i++)		nbuf += strlen(argv[i]) + (i > 0);	buf = emalloc(nbuf);	buf[0] = '/0';	while(argc) {		strcat(buf, ARGF());		if(argc)			strcat(buf, " ");	}	if(ixp_write(fid, buf, nbuf) == -1)		fatal("cannot write file '%s': %r/n", file);	ixp_close(fid);	free(buf);	return 0;}

voidthreadmain(int argc, char *argv[]){	uint32_t bcmem;	bcmem = 0;	ARGBEGIN{	case 'B':		bcmem = unittoull(ARGF());		break;	default:		usage();		break;	}ARGEND	readonly = 1;	if(argc != 1)		usage();	if(initventi(argv[0], &conf) < 0)		sysfatal("can't init venti: %r");	if(bcmem < maxblocksize * (mainindex->narenas + mainindex->nsects * 4 + 16))		bcmem = maxblocksize * (mainindex->narenas + mainindex->nsects * 4 + 16);	if(0) fprint(2, "initialize %d bytes of disk block cache/n", bcmem);	initdcache(bcmem);	clumpstats(mainindex);		threadexitsall(0);}

voidmain(int argc, char **argv){	Ndb *db;	char *dbfile = 0;	ARGBEGIN{	case 'f':		dbfile = ARGF();		break;	default:		usage();		break;	}ARGEND;	if(argc < 3)		usage();	db = ndbopen(dbfile);	if(db == 0){		fprint(2, "no db files/n");		exits("no db");	}	search(db, argv[0], argv[1], argv+2, argc-2);	ndbclose(db);	exits(0);}

intmain(int argc, char *argv[]) {	char *s;	ARGBEGIN{	default:		usage();	}ARGEND;	setlocale(LC_CTYPE, "");	initdisplay();	s = ARGF();	if(s && !getulong(s, &win.w))		usage();	if (!s)		win.w = getfocus();	if(argc)		usage();	click(&win, Pt(1, 1));	XCloseDisplay(display);	return 0;}

voidmain(int argc, char *argv[]){	Modem *m;	m = &modems[0];	ARGBEGIN{	case 'v':		vflag = 1;		break;	case 's':		spool = ARGF();		break;	default:		usage();		break;	}ARGEND	initmodem(m, 0, -1, type, 0);	receivedone(m, faxreceive(m, spool));	exits(0);}

voidthreadmain(int argc, char *argv[]){	u32int bcmem;	int fix;	fix = 0;	bcmem = 0;	ARGBEGIN{	case 'B':		bcmem = unittoull(ARGF());		break;	default:		usage();		break;	}ARGEND	if(!fix)		readonly = 1;	if(argc != 1)		usage();	if(initventi(argv[0], &conf) < 0)		sysfatal("can't init venti: %r");	printindex(1, mainindex);	threadexitsall(0);}

voidmain(int argc, char *argv[]){	VtSession *z;	int i, j, t;	int start;	uchar buf[BlockSize];	srand(time(0));	ARGBEGIN{	case 'r':		rflag++;		break;	case 'n':		nblock = atoi(ARGF());		break;	}ARGEND	for(i=0; i<nblock; i++)		perm[i] = i;	if(rflag) {		for(i=0; i<nblock; i++) {			j = nrand(nblock);			t = perm[j];			perm[j] = perm[i];			perm[i] = t;		}	}	if(readn(0, data, VtScoreSize*nblock) < VtScoreSize*nblock)		sysfatal("read failed: %r");	vtAttach();	z = vtDial("iolaire2");	if(z == nil)		sysfatal("cound not connect to venti");	if(!vtConnect(z, 0))		vtFatal("vtConnect: %s", vtGetError());	print("starting/n");	start = times(0);	if(rflag && nblock > 10000)		nblock = 10000;	for(i=0; i<nblock; i++) {		if(vtRead(z, data+perm[i]*VtScoreSize, VtDataType, buf, BlockSize) < 0)			vtFatal("vtRead failed: %d: %s", i, vtGetError());	}	print("time = %f/n", (times(0) - start)*0.001);	vtClose(z);	vtDetach();}

voidthreadmain(int argc, char **argv){	NbName from, to;	char *e = nil;	int netbios = 0;	ARGBEGIN {	case 'u':		smbglobals.unicode = strtol(ARGF(), 0, 0) != 0;		break;	case 'p':		smbglobals.log.print = 1;		break;	case 'd':		logset(ARGF());		break;	case 'w':		smbglobals.primarydomain = ARGF();		break;	case 'n':		netbios = 1;		break;	default:		usage();	} ARGEND;	smbglobalsguess(0);	smblistencifs(cifsaccept);	if (netbios) {		nbinit();		nbmknamefromstring(from, "*");		nbmknamefromstring(to, "*smbserver//x20");		nbsslisten(to, from, nbssaccept, nil);		nbmknamefromstringandtype(to, smbglobals.serverinfo.name, 0x20);		nbsslisten(to, from, nbssaccept, nil);	}	smblogprint(-1, "Aquarela %d.%d running/n", smbglobals.serverinfo.vmaj, smbglobals.serverinfo.vmin);	for (;;) {		if (netbios&& !smbbrowsesendhostannouncement(smbglobals.serverinfo.name, 60 * 1000,			SV_TYPE_SERVER,			smbglobals.serverinfo.remark, &e)) {			smblogprint(-1, "hostannounce failed: %s/n", e);		}		if (sleep(60 * 1000) < 0)			break;	}}

voidmain(int argc, char **argv){	int from, to;	int size = 24;	int src = Jis;	char *file = 0;	long nc, nb;	int x;	uchar *bits;	long *chars;	int raw = 0;	Bitmap *b, *b1;	Subfont *f;	int *found;	ARGBEGIN{	case 'f':	file = ARGF(); break;	case 'r':	raw = 1; break;	case '5':	src = Big5; break;	case 's':	size = 16; break;	case 'g':	src = Gb_bdf; break;	case 'q':	src = Gb_qw; break;	default:	usage();	}ARGEND	if(file == 0)		file = source[src].names[(size==24)? Size24:Size16];	if(argc != 2)		usage();	from = strtol(argv[0], (char **)0, 0);	to = strtol(argv[1], (char **)0, 0);	binit(0, 0, "fontgen");	nc = to-from+1;	nb = size*size/8;		/* bytes per char */	nb *= nc;	bits = (uchar *)malloc(nb);	chars = (long *)malloc(sizeof(long)*nc);	found = (int *)malloc(sizeof(found[0])*nc);	if(bits == 0 || chars == 0){		fprint(2, "%s: couldn't malloc %d bytes for %d chars/n", argv0, nb, nc);		exits("out of memory");	}	if(raw){		for(x = from; x <= to; x++)			chars[x-from] = x;	} else		source[src].mfn(from, to, chars);	memset(bits, 0, nb);	b = source[src].bfn(file, nc, chars, size, bits, &found);	b1 = balloc(b->r, b->ldepth);	bitblt(b1, b1->r.min, b, b->r, S);	f = bf(nc, size, b1, found);	wrbitmapfile(1, b);	wrsubfontfile(1, f);/**/	exits(0);}

voidmain(int argc, char **argv){	int ro;	char *file, *mount;	mount = "/n/brzr";	ro = 0;	file = "/dev/flash/fs";	ARGBEGIN {	case 'D':		chatty9p++;		break;	case 'r':		ro++;		break;	case 'n':		nsects = argval(ARGF());		break;	case 'z':		sectsize = argval(ARGF());		break;	case 'f':		file = ARGF();		break;	case 'm':		mount = ARGF();		break;	default:		usage();	} ARGEND	if(argc != 0)		usage();	initdata(file, 0);	sectbuff = emalloc9p(sectsize);	einit();	loadfs(ro);	serve(mount);	exits(nil);}

voidmain(int argc, char	*argv[]){	char *ifile, *ofile;	Cmd = argv[0];	Hdrtype = 2;	ARGBEGIN {	/*	 * Options without args	 */	case 's':		Strip = 1;		break;	/*	 * Options with args	 */	case 'T':		Txtaddr = strxtol(ARGF());		break;	case 'H':		Hdrtype = strxtol(ARGF());		break;	case 'D':		Debug |= strxtol(ARGF());		break;	default:		Usage("Invalid option");	} ARGEND	if (argc != 2)		Usage("Wrong number of arguments");	ifile = argv[0];	ofile = argv[1];	get_file(ifile);	put_file(ofile);	exits(0);}

voidmain(int argc, char *argv[]){	char *name, buf[4*1024];	int fd, n, i, errs;	name = 0;	ARGBEGIN{	case 'n':		name = ARGF();		break;	default:		fprint(2, "usage: kfscmd [-n server] commands/n");		exits("usage");	}ARGEND	if(name)		snprint(buf, sizeof buf, "/srv/kfs.%s.cmd", name);	else		strcpy(buf, "/srv/kfs.cmd");	fd = open(buf, ORDWR);	if(fd < 0){		fprint(2, "kfscmd: can't open commands file/n");		exits("commands file");	}	errs = 0;	for(i = 0; i < argc; i++){		if(write(fd, argv[i], strlen(argv[i])) != strlen(argv[i])){			fprint(2, "%s: error writing %s: %r", argv0, argv[i]);			errs++;			continue;		}		for(;;){			n = read(fd, buf, sizeof buf - 1);			if(n < 0){				fprint(2, "%s: error executing %s: %r", argv0, argv[i]);				errs++;				break;			}			buf[n] = '/0';			if(strcmp(buf, "done") == 0 || strcmp(buf, "success") == 0)				break;			if(strcmp(buf, "unknown command") == 0){				errs++;				print("kfscmd: command %s not recognized/n", argv[i]);				break;			}			write(1, buf, n);		}	}	exits(errs ? "errors" : 0);		}

voidmain(int argc, char **argv){	ulong i;	int m, n;	char *file;	uchar hdr[MAXHDR];	ARGBEGIN {	case 'n':		nsects = argval(ARGF());		break;	case 'z':		sectsize = argval(ARGF());		break;	default:		usage();	} ARGEND	if(argc != 1)		usage();	file = argv[0];	sectbuff = emalloc9p(sectsize);	initdata(file, 1);	memmove(hdr, magic, MAGSIZE);	m = putc3(&hdr[MAGSIZE], 0);	n = putc3(&hdr[MAGSIZE + m], 0);	clearsect(0);	writedata(0, 0, hdr, MAGSIZE + m + n, 0);	for(i = 1; i < nsects - 1; i++)		clearsect(i);	m = putc3(&hdr[MAGSIZE], 1);	n = putc3(&hdr[MAGSIZE + m], 0);	clearsect(nsects - 1);	writedata(0, nsects - 1, hdr, MAGSIZE + m + n, 0);}

voidthreadmain(int argc, char **argv){	char *p;	int lfd;	p = "[email
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