[unix-history] / usr / src / usr.bin / ul / ul.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)ul.c	5.4 (Berkeley) %G%";
#endif /* not lint */

#include <stdio.h>

#define	IESC	'\033'
#define	SO	'\016'
#define	SI	'\017'
#define	HFWD	'9'
#define	HREV	'8'
#define	FREV	'7'
#define	MAXBUF	512

#define	NORMAL	000
#define	ALTSET	001	/* Reverse */
#define	SUPERSC	002	/* Dim */
#define	SUBSC	004	/* Dim | Ul */
#define	UNDERL	010	/* Ul */
#define	BOLD	020	/* Bold */

int	must_use_uc, must_overstrike;
char	*CURS_UP, *CURS_RIGHT, *CURS_LEFT,
	*ENTER_STANDOUT, *EXIT_STANDOUT, *ENTER_UNDERLINE, *EXIT_UNDERLINE,
	*ENTER_DIM, *ENTER_BOLD, *ENTER_REVERSE, *UNDER_CHAR, *EXIT_ATTRIBUTES;

struct	CHAR	{
	char	c_mode;
	char	c_char;
} ;

struct	CHAR	obuf[MAXBUF];
int	col, maxcol;
int	mode;
int	halfpos;
int	upln;
int	iflag;

main(argc, argv)
	int argc;
	char **argv;
{
	extern int optind;
	extern char *optarg;
	int c;
	char *termtype;
	FILE *f;
	char termcap[1024];
	char *getenv(), *strcpy();

	termtype = getenv("TERM");
	if (termtype == NULL || (argv[0][0] == 'c' && !isatty(1)))
		termtype = "lpr";
	while ((c=getopt(argc, argv, "it:T:")) != EOF)
		switch(c) {

		case 't':
		case 'T': /* for nroff compatibility */
				termtype = optarg;
			break;
		case 'i':
			iflag = 1;
			break;

		default:
			fprintf(stderr,
				"usage: %s [ -i ] [ -tTerm ] file...\n",
				argv[0]);
			exit(1);
		}

	switch(tgetent(termcap, termtype)) {

	case 1:
		break;

	default:
		fprintf(stderr,"trouble reading termcap");
		/* fall through to ... */

	case 0:
		/* No such terminal type - assume dumb */
		(void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:");
		break;
	}
	initcap();
	if (    (tgetflag("os") && ENTER_BOLD==NULL ) ||
		(tgetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL))
			must_overstrike = 1;
	initbuf();
	if (optind == argc)
		filter(stdin);
	else for (; optind<argc; optind++) {
		f = fopen(argv[optind],"r");
		if (f == NULL) {
			perror(argv[optind]);
			exit(1);
		} else
			filter(f);
	}
	exit(0);
}

filter(f)
FILE *f;
{
	register c;

	while((c = getc(f)) != EOF) switch(c) {

	case '\b':
		if (col > 0)
			col--;
		continue;

	case '\t':
		col = (col+8) & ~07;
		if (col > maxcol)
			maxcol = col;
		continue;

	case '\r':
		col = 0;
		continue;

	case SO:
		mode |= ALTSET;
		continue;

	case SI:
		mode &= ~ALTSET;
		continue;

	case IESC:
		switch (c = getc(f)) {

		case HREV:
			if (halfpos == 0) {
				mode |= SUPERSC;
				halfpos--;
			} else if (halfpos > 0) {
				mode &= ~SUBSC;
				halfpos--;
			} else {
				halfpos = 0;
				reverse();
			}
			continue;

		case HFWD:
			if (halfpos == 0) {
				mode |= SUBSC;
				halfpos++;
			} else if (halfpos < 0) {
				mode &= ~SUPERSC;
				halfpos++;
			} else {
				halfpos = 0;
				fwd();
			}
			continue;

		case FREV:
			reverse();
			continue;

		default:
			fprintf(stderr,
				"Unknown escape sequence in input: %o, %o\n",
				IESC, c);
			exit(1);
		}
		continue;

	case '_':
		if (obuf[col].c_char)
			obuf[col].c_mode |= UNDERL | mode;
		else
			obuf[col].c_char = '_';
	case ' ':
		col++;
		if (col > maxcol)
			maxcol = col;
		continue;

	case '\n':
		flushln();
		continue;

	case '\f':
		flushln();
		putchar('\f');
		continue;

	default:
		if (c < ' ')	/* non printing */
			continue;
		if (obuf[col].c_char == '\0') {
			obuf[col].c_char = c;
			obuf[col].c_mode = mode;
		} else if (obuf[col].c_char == '_') {
			obuf[col].c_char = c;
			obuf[col].c_mode |= UNDERL|mode;
		} else if (obuf[col].c_char == c)
			obuf[col].c_mode |= BOLD|mode;
		else
			obuf[col].c_mode = mode;
		col++;
		if (col > maxcol)
			maxcol = col;
		continue;
	}
	if (maxcol)
		flushln();
}

flushln()
{
	register lastmode;
	register i;
	int hadmodes = 0;

	lastmode = NORMAL;
	for (i=0; i<maxcol; i++) {
		if (obuf[i].c_mode != lastmode) {
			hadmodes++;
			setmode(obuf[i].c_mode);
			lastmode = obuf[i].c_mode;
		}
		if (obuf[i].c_char == '\0') {
			if (upln) {
				puts(CURS_RIGHT);
			} else
				outc(' ');
		} else
			outc(obuf[i].c_char);
	}
	if (lastmode != NORMAL) {
		setmode(0);
	}
	if (must_overstrike && hadmodes)
		overstrike();
	putchar('\n');
	if (iflag && hadmodes)
		iattr();
	(void)fflush(stdout);
	if (upln)
		upln--;
	initbuf();
}

/*
 * For terminals that can overstrike, overstrike underlines and bolds.
 * We don't do anything with halfline ups and downs, or Greek.
 */
overstrike()
{
	register int i;
	char lbuf[256];
	register char *cp = lbuf;
	int hadbold=0;

	/* Set up overstrike buffer */
	for (i=0; i<maxcol; i++)
		switch (obuf[i].c_mode) {
		case NORMAL:
		default:
			*cp++ = ' ';
			break;
		case UNDERL:
			*cp++ = '_';
			break;
		case BOLD:
			*cp++ = obuf[i].c_char;
			hadbold=1;
			break;
		}
	putchar('\r');
	for (*cp=' '; *cp==' '; cp--)
		*cp = 0;
	for (cp=lbuf; *cp; cp++)
		putchar(*cp);
	if (hadbold) {
		putchar('\r');
		for (cp=lbuf; *cp; cp++)
			putchar(*cp=='_' ? ' ' : *cp);
		putchar('\r');
		for (cp=lbuf; *cp; cp++)
			putchar(*cp=='_' ? ' ' : *cp);
	}
}

iattr()
{
	register int i;
	char lbuf[256];
	register char *cp = lbuf;

	for (i=0; i<maxcol; i++)
		switch (obuf[i].c_mode) {
		case NORMAL:	*cp++ = ' '; break;
		case ALTSET:	*cp++ = 'g'; break;
		case SUPERSC:	*cp++ = '^'; break;
		case SUBSC:	*cp++ = 'v'; break;
		case UNDERL:	*cp++ = '_'; break;
		case BOLD:	*cp++ = '!'; break;
		default:	*cp++ = 'X'; break;
		}
	for (*cp=' '; *cp==' '; cp--)
		*cp = 0;
	for (cp=lbuf; *cp; cp++)
		putchar(*cp);
	putchar('\n');
}

initbuf()
{

	bzero((char *)obuf, sizeof (obuf));	/* depends on NORMAL == 0 */
	col = 0;
	maxcol = 0;
	mode &= ALTSET;
}

fwd()
{
	register oldcol, oldmax;

	oldcol = col;
	oldmax = maxcol;
	flushln();
	col = oldcol;
	maxcol = oldmax;
}

reverse()
{
	upln++;
	fwd();
	puts(CURS_UP);
	puts(CURS_UP);
	upln++;
}

initcap()
{
	static char tcapbuf[512];
	char *bp = tcapbuf;
	char *getenv(), *tgetstr();

	/* This nonsense attempts to work with both old and new termcap */
	CURS_UP =		tgetstr("up", &bp);
	CURS_RIGHT =		tgetstr("ri", &bp);
	if (CURS_RIGHT == NULL)
		CURS_RIGHT =	tgetstr("nd", &bp);
	CURS_LEFT =		tgetstr("le", &bp);
	if (CURS_LEFT == NULL)
		CURS_LEFT =	tgetstr("bc", &bp);
	if (CURS_LEFT == NULL && tgetflag("bs"))
		CURS_LEFT =	"\b";

	ENTER_STANDOUT =	tgetstr("so", &bp);
	EXIT_STANDOUT =		tgetstr("se", &bp);
	ENTER_UNDERLINE =	tgetstr("us", &bp);
	EXIT_UNDERLINE =	tgetstr("ue", &bp);
	ENTER_DIM =		tgetstr("mh", &bp);
	ENTER_BOLD =		tgetstr("md", &bp);
	ENTER_REVERSE =		tgetstr("mr", &bp);
	EXIT_ATTRIBUTES =	tgetstr("me", &bp);

	if (!ENTER_BOLD && ENTER_REVERSE)
		ENTER_BOLD = ENTER_REVERSE;
	if (!ENTER_BOLD && ENTER_STANDOUT)
		ENTER_BOLD = ENTER_STANDOUT;
	if (!ENTER_UNDERLINE && ENTER_STANDOUT) {
		ENTER_UNDERLINE = ENTER_STANDOUT;
		EXIT_UNDERLINE = EXIT_STANDOUT;
	}
	if (!ENTER_DIM && ENTER_STANDOUT)
		ENTER_DIM = ENTER_STANDOUT;
	if (!ENTER_REVERSE && ENTER_STANDOUT)
		ENTER_REVERSE = ENTER_STANDOUT;
	if (!EXIT_ATTRIBUTES && EXIT_STANDOUT)
		EXIT_ATTRIBUTES = EXIT_STANDOUT;
	
	/*
	 * Note that we use REVERSE for the alternate character set,
	 * not the as/ae capabilities.  This is because we are modelling
	 * the model 37 teletype (since that's what nroff outputs) and
	 * the typical as/ae is more of a graphics set, not the greek
	 * letters the 37 has.
	 */

	UNDER_CHAR =		tgetstr("uc", &bp);
	must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE);
}

outchar(c)
char c;
{
	putchar(c&0177);
}

puts(str)
char *str;
{
	if (str)
		tputs(str, 1, outchar);
}

static curmode = 0;
outc(c)
char c;
{
	putchar(c);
	if (must_use_uc &&  (curmode&UNDERL)) {
		puts(CURS_LEFT);
		puts(UNDER_CHAR);
	}
}

setmode(newmode)
int newmode;
{
	if (!iflag)
	{
		if (curmode != NORMAL && newmode != NORMAL)
			setmode(NORMAL);
		switch (newmode) {
		case NORMAL:
			switch(curmode) {
			case NORMAL:
				break;
			case UNDERL:
				puts(EXIT_UNDERLINE);
				break;
			default:
				/* This includes standout */
				puts(EXIT_ATTRIBUTES);
				break;
			}
			break;
		case ALTSET:
			puts(ENTER_REVERSE);
			break;
		case SUPERSC:
			/*
			 * This only works on a few terminals.
			 * It should be fixed.
			 */
			puts(ENTER_UNDERLINE);
			puts(ENTER_DIM);
			break;
		case SUBSC:
			puts(ENTER_DIM);
			break;
		case UNDERL:
			puts(ENTER_UNDERLINE);
			break;
		case BOLD:
			puts(ENTER_BOLD);
			break;
		default:
			/*
			 * We should have some provision here for multiple modes
			 * on at once.  This will have to come later.
			 */
			puts(ENTER_STANDOUT);
			break;
		}
	}
	curmode = newmode;
}
Commit	Line	Data
22e155fc DF	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
	7	#ifndef lint
	8	char copyright[] =
	9	"@(#) Copyright (c) 1980 Regents of the University of California.\n\
	10	All rights reserved.\n";
ac0d117c	11	#endif /* not lint */
22e155fc	12
476fcd16	13	#ifndef lint
ac0d117c KB	14	static char sccsid[] = "@(#)ul.c 5.4 (Berkeley) %G%";
ac0d117c KB	15	#endif /* not lint */
a7878ce2	16
2770968b BJ	17	#include <stdio.h>
2770968b BJ	18
94c88dd0 BJ	19	#define IESC '\033'
	20	#define SO '\016'
	21	#define SI '\017'
	22	#define HFWD '9'
	23	#define HREV '8'
	24	#define FREV '7'
	25	#define MAXBUF 512
	26
	27	#define NORMAL 000
	28	#define ALTSET 001 /* Reverse */
	29	#define SUPERSC 002 /* Dim */
	30	#define SUBSC 004 /* Dim \| Ul */
	31	#define UNDERL 010 /* Ul */
	32	#define BOLD 020 /* Bold */
	33
	34	int must_use_uc, must_overstrike;
	35	char CURS_UP, CURS_RIGHT, *CURS_LEFT,
	36	ENTER_STANDOUT, EXIT_STANDOUT, ENTER_UNDERLINE, EXIT_UNDERLINE,
	37	ENTER_DIM, ENTER_BOLD, ENTER_REVERSE, UNDER_CHAR, *EXIT_ATTRIBUTES;
	38
	39	struct CHAR {
	40	char c_mode;
	41	char c_char;
	42	} ;
	43
94c88dd0 BJ	44	struct CHAR obuf[MAXBUF];
	45	int col, maxcol;
	46	int mode;
	47	int halfpos;
	48	int upln;
	49	int iflag;
2770968b BJ	50
	51	main(argc, argv)
	52	int argc;
	53	char **argv;
	54	{
ac0d117c KB	55	extern int optind;
ac0d117c KB	56	extern char *optarg;
94c88dd0	57	int c;
ac0d117c	58	char *termtype;
2770968b	59	FILE *f;
94c88dd0	60	char termcap[1024];
ac0d117c	61	char getenv(), strcpy();
2770968b	62
2770968b	63	termtype = getenv("TERM");
94c88dd0 BJ	64	if (termtype == NULL \|\| (argv[0][0] == 'c' && !isatty(1)))
	65	termtype = "lpr";
	66	while ((c=getopt(argc, argv, "it:T:")) != EOF)
	67	switch(c) {
2770968b BJ	68
	69	case 't':
	70	case 'T': /* for nroff compatibility */
94c88dd0	71	termtype = optarg;
2770968b BJ	72	break;
2770968b BJ	73	case 'i':
94c88dd0 BJ	74	iflag = 1;
94c88dd0 BJ	75	break;
2770968b BJ	76
2770968b BJ	77	default:
94c88dd0	78	fprintf(stderr,
ac0d117c	79	"usage: %s [ -i ] [ -tTerm ] file...\n",
94c88dd0	80	argv[0]);
2770968b BJ	81	exit(1);
2770968b BJ	82	}
94c88dd0	83
2770968b BJ	84	switch(tgetent(termcap, termtype)) {
	85
	86	case 1:
2770968b BJ	87	break;
	88
	89	default:
	90	fprintf(stderr,"trouble reading termcap");
	91	/* fall through to ... */
	92
	93	case 0:
	94	/* No such terminal type - assume dumb */
ac0d117c	95	(void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:");
2770968b BJ	96	break;
2770968b BJ	97	}
94c88dd0 BJ	98	initcap();
	99	if ( (tgetflag("os") && ENTER_BOLD==NULL ) \|\|
	100	(tgetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL))
	101	must_overstrike = 1;
94c88dd0 BJ	102	initbuf();
94c88dd0 BJ	103	if (optind == argc)
2770968b	104	filter(stdin);
94c88dd0 BJ	105	else for (; optind<argc; optind++) {
94c88dd0 BJ	106	f = fopen(argv[optind],"r");
2770968b	107	if (f == NULL) {
94c88dd0	108	perror(argv[optind]);
2770968b BJ	109	exit(1);
	110	} else
	111	filter(f);
	112	}
	113	exit(0);
	114	}
	115
	116	filter(f)
	117	FILE *f;
	118	{
94c88dd0	119	register c;
2770968b	120
94c88dd0 BJ	121	while((c = getc(f)) != EOF) switch(c) {
	122
	123	case '\b':
	124	if (col > 0)
	125	col--;
	126	continue;
	127
	128	case '\t':
	129	col = (col+8) & ~07;
	130	if (col > maxcol)
	131	maxcol = col;
	132	continue;
	133
	134	case '\r':
	135	col = 0;
	136	continue;
	137
	138	case SO:
	139	mode \|= ALTSET;
	140	continue;
	141
	142	case SI:
	143	mode &= ~ALTSET;
	144	continue;
	145
	146	case IESC:
	147	switch (c = getc(f)) {
	148
	149	case HREV:
	150	if (halfpos == 0) {
	151	mode \|= SUPERSC;
	152	halfpos--;
	153	} else if (halfpos > 0) {
	154	mode &= ~SUBSC;
	155	halfpos--;
2770968b	156	} else {
94c88dd0 BJ	157	halfpos = 0;
94c88dd0 BJ	158	reverse();
2770968b	159	}
94c88dd0	160	continue;
2770968b	161
94c88dd0 BJ	162	case HFWD:
	163	if (halfpos == 0) {
	164	mode \|= SUBSC;
	165	halfpos++;
	166	} else if (halfpos < 0) {
	167	mode &= ~SUPERSC;
	168	halfpos++;
	169	} else {
	170	halfpos = 0;
	171	fwd();
2770968b	172	}
94c88dd0 BJ	173	continue;
	174
	175	case FREV:
	176	reverse();
	177	continue;
	178
	179	default:
	180	fprintf(stderr,
	181	"Unknown escape sequence in input: %o, %o\n",
	182	IESC, c);
	183	exit(1);
2770968b	184	}
94c88dd0 BJ	185	continue;
	186
	187	case '_':
	188	if (obuf[col].c_char)
	189	obuf[col].c_mode \|= UNDERL \| mode;
	190	else
	191	obuf[col].c_char = '_';
	192	case ' ':
	193	col++;
	194	if (col > maxcol)
	195	maxcol = col;
	196	continue;
	197
	198	case '\n':
	199	flushln();
5041df75	200	continue;
94c88dd0	201
ac0d117c KB	202	case '\f':
	203	flushln();
	204	putchar('\f');
	205	continue;
	206
94c88dd0 BJ	207	default:
	208	if (c < ' ') /* non printing */
	209	continue;
	210	if (obuf[col].c_char == '\0') {
	211	obuf[col].c_char = c;
	212	obuf[col].c_mode = mode;
	213	} else if (obuf[col].c_char == '_') {
	214	obuf[col].c_char = c;
	215	obuf[col].c_mode \|= UNDERL\|mode;
5041df75	216	} else if (obuf[col].c_char == c)
94c88dd0	217	obuf[col].c_mode \|= BOLD\|mode;
eda93319	218	else
5041df75	219	obuf[col].c_mode = mode;
94c88dd0 BJ	220	col++;
	221	if (col > maxcol)
	222	maxcol = col;
	223	continue;
2770968b	224	}
5041df75 RC	225	if (maxcol)
5041df75 RC	226	flushln();
2770968b BJ	227	}
2770968b BJ	228
94c88dd0	229	flushln()
2770968b	230	{
94c88dd0 BJ	231	register lastmode;
	232	register i;
	233	int hadmodes = 0;
	234
	235	lastmode = NORMAL;
	236	for (i=0; i<maxcol; i++) {
	237	if (obuf[i].c_mode != lastmode) {
	238	hadmodes++;
	239	setmode(obuf[i].c_mode);
	240	lastmode = obuf[i].c_mode;
	241	}
	242	if (obuf[i].c_char == '\0') {
	243	if (upln) {
	244	puts(CURS_RIGHT);
	245	} else
	246	outc(' ');
	247	} else
	248	outc(obuf[i].c_char);
	249	}
	250	if (lastmode != NORMAL) {
	251	setmode(0);
	252	}
	253	if (must_overstrike && hadmodes)
	254	overstrike();
	255	putchar('\n');
	256	if (iflag && hadmodes)
	257	iattr();
ac0d117c	258	(void)fflush(stdout);
94c88dd0 BJ	259	if (upln)
	260	upln--;
	261	initbuf();
2770968b BJ	262	}
2770968b BJ	263
94c88dd0 BJ	264	/*
	265	* For terminals that can overstrike, overstrike underlines and bolds.
	266	* We don't do anything with halfline ups and downs, or Greek.
	267	*/
	268	overstrike()
	269	{
	270	register int i;
	271	char lbuf[256];
	272	register char *cp = lbuf;
	273	int hadbold=0;
2770968b	274
94c88dd0 BJ	275	/* Set up overstrike buffer */
	276	for (i=0; i<maxcol; i++)
	277	switch (obuf[i].c_mode) {
	278	case NORMAL:
	279	default:
	280	*cp++ = ' ';
	281	break;
	282	case UNDERL:
	283	*cp++ = '_';
	284	break;
	285	case BOLD:
	286	*cp++ = obuf[i].c_char;
	287	hadbold=1;
	288	break;
	289	}
	290	putchar('\r');
	291	for (cp=' '; cp==' '; cp--)
	292	*cp = 0;
	293	for (cp=lbuf; *cp; cp++)
	294	putchar(*cp);
	295	if (hadbold) {
	296	putchar('\r');
	297	for (cp=lbuf; *cp; cp++)
	298	putchar(cp=='_' ? ' ' : cp);
	299	putchar('\r');
	300	for (cp=lbuf; *cp; cp++)
	301	putchar(cp=='_' ? ' ' : cp);
	302	}
	303	}
2770968b	304
94c88dd0	305	iattr()
2770968b	306	{
94c88dd0 BJ	307	register int i;
	308	char lbuf[256];
	309	register char *cp = lbuf;
2770968b	310
94c88dd0 BJ	311	for (i=0; i<maxcol; i++)
	312	switch (obuf[i].c_mode) {
	313	case NORMAL: *cp++ = ' '; break;
	314	case ALTSET: *cp++ = 'g'; break;
	315	case SUPERSC: *cp++ = '^'; break;
	316	case SUBSC: *cp++ = 'v'; break;
	317	case UNDERL: *cp++ = '_'; break;
	318	case BOLD: *cp++ = '!'; break;
	319	default: *cp++ = 'X'; break;
2770968b	320	}
94c88dd0 BJ	321	for (cp=' '; cp==' '; cp--)
	322	*cp = 0;
	323	for (cp=lbuf; *cp; cp++)
	324	putchar(*cp);
	325	putchar('\n');
2770968b BJ	326	}
2770968b BJ	327
94c88dd0	328	initbuf()
2770968b	329	{
2770968b	330
ac0d117c	331	bzero((char )obuf, sizeof (obuf)); / depends on NORMAL == 0 */
94c88dd0 BJ	332	col = 0;
	333	maxcol = 0;
	334	mode &= ALTSET;
2770968b BJ	335	}
2770968b BJ	336
94c88dd0	337	fwd()
2770968b	338	{
94c88dd0	339	register oldcol, oldmax;
2770968b	340
94c88dd0 BJ	341	oldcol = col;
	342	oldmax = maxcol;
	343	flushln();
	344	col = oldcol;
	345	maxcol = oldmax;
	346	}
	347
	348	reverse()
	349	{
	350	upln++;
	351	fwd();
	352	puts(CURS_UP);
	353	puts(CURS_UP);
	354	upln++;
	355	}
	356
	357	initcap()
	358	{
	359	static char tcapbuf[512];
94c88dd0 BJ	360	char *bp = tcapbuf;
	361	char getenv(), tgetstr();
	362
	363	/* This nonsense attempts to work with both old and new termcap */
	364	CURS_UP = tgetstr("up", &bp);
	365	CURS_RIGHT = tgetstr("ri", &bp);
	366	if (CURS_RIGHT == NULL)
	367	CURS_RIGHT = tgetstr("nd", &bp);
	368	CURS_LEFT = tgetstr("le", &bp);
	369	if (CURS_LEFT == NULL)
	370	CURS_LEFT = tgetstr("bc", &bp);
	371	if (CURS_LEFT == NULL && tgetflag("bs"))
	372	CURS_LEFT = "\b";
	373
	374	ENTER_STANDOUT = tgetstr("so", &bp);
	375	EXIT_STANDOUT = tgetstr("se", &bp);
	376	ENTER_UNDERLINE = tgetstr("us", &bp);
	377	EXIT_UNDERLINE = tgetstr("ue", &bp);
	378	ENTER_DIM = tgetstr("mh", &bp);
	379	ENTER_BOLD = tgetstr("md", &bp);
	380	ENTER_REVERSE = tgetstr("mr", &bp);
	381	EXIT_ATTRIBUTES = tgetstr("me", &bp);
	382
	383	if (!ENTER_BOLD && ENTER_REVERSE)
	384	ENTER_BOLD = ENTER_REVERSE;
	385	if (!ENTER_BOLD && ENTER_STANDOUT)
	386	ENTER_BOLD = ENTER_STANDOUT;
	387	if (!ENTER_UNDERLINE && ENTER_STANDOUT) {
	388	ENTER_UNDERLINE = ENTER_STANDOUT;
	389	EXIT_UNDERLINE = EXIT_STANDOUT;
	390	}
	391	if (!ENTER_DIM && ENTER_STANDOUT)
	392	ENTER_DIM = ENTER_STANDOUT;
	393	if (!ENTER_REVERSE && ENTER_STANDOUT)
	394	ENTER_REVERSE = ENTER_STANDOUT;
	395	if (!EXIT_ATTRIBUTES && EXIT_STANDOUT)
	396	EXIT_ATTRIBUTES = EXIT_STANDOUT;
	397
	398	/*
	399	* Note that we use REVERSE for the alternate character set,
	400	* not the as/ae capabilities. This is because we are modelling
	401	* the model 37 teletype (since that's what nroff outputs) and
	402	* the typical as/ae is more of a graphics set, not the greek
	403	* letters the 37 has.
	404	*/
	405
94c88dd0 BJ	406	UNDER_CHAR = tgetstr("uc", &bp);
	407	must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE);
	408	}
	409
	410	outchar(c)
	411	char c;
	412	{
	413	putchar(c&0177);
	414	}
	415
	416	puts(str)
	417	char *str;
	418	{
	419	if (str)
	420	tputs(str, 1, outchar);
	421	}
	422
	423	static curmode = 0;
	424	outc(c)
	425	char c;
	426	{
	427	putchar(c);
	428	if (must_use_uc && (curmode&UNDERL)) {
	429	puts(CURS_LEFT);
	430	puts(UNDER_CHAR);
	431	}
	432	}
	433
	434	setmode(newmode)
	435	int newmode;
	436	{
	437	if (!iflag)
a7878ce2 BJ	438	{
	439	if (curmode != NORMAL && newmode != NORMAL)
	440	setmode(NORMAL);
94c88dd0 BJ	441	switch (newmode) {
	442	case NORMAL:
	443	switch(curmode) {
	444	case NORMAL:
2770968b	445	break;
94c88dd0 BJ	446	case UNDERL:
94c88dd0 BJ	447	puts(EXIT_UNDERLINE);
2770968b	448	break;
94c88dd0 BJ	449	default:
	450	/* This includes standout */
	451	puts(EXIT_ATTRIBUTES);
2770968b	452	break;
94c88dd0 BJ	453	}
	454	break;
	455	case ALTSET:
	456	puts(ENTER_REVERSE);
	457	break;
	458	case SUPERSC:
	459	/*
	460	* This only works on a few terminals.
	461	* It should be fixed.
	462	*/
	463	puts(ENTER_UNDERLINE);
	464	puts(ENTER_DIM);
	465	break;
	466	case SUBSC:
	467	puts(ENTER_DIM);
	468	break;
	469	case UNDERL:
	470	puts(ENTER_UNDERLINE);
	471	break;
	472	case BOLD:
	473	puts(ENTER_BOLD);
	474	break;
	475	default:
	476	/*
	477	* We should have some provision here for multiple modes
	478	* on at once. This will have to come later.
	479	*/
	480	puts(ENTER_STANDOUT);
	481	break;
2770968b	482	}
a7878ce2	483	}
94c88dd0 BJ	484	curmode = newmode;
94c88dd0 BJ	485	}