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

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#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	5.7 (Berkeley) 2/2/91";
#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;

int	outchar();
#define	PRINT(s)	if (s == NULL) /* void */; else tputs(s, 1, outchar)

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)
				PRINT(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();
	PRINT(CURS_UP);
	PRINT(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)
	int c;
{
	putchar(c & 0177);
}

static int curmode = 0;

outc(c)
	int c;
{
	putchar(c);
	if (must_use_uc && (curmode&UNDERL)) {
		PRINT(CURS_LEFT);
		PRINT(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:
				PRINT(EXIT_UNDERLINE);
				break;
			default:
				/* This includes standout */
				PRINT(EXIT_ATTRIBUTES);
				break;
			}
			break;
		case ALTSET:
			PRINT(ENTER_REVERSE);
			break;
		case SUPERSC:
			/*
			 * This only works on a few terminals.
			 * It should be fixed.
			 */
			PRINT(ENTER_UNDERLINE);
			PRINT(ENTER_DIM);
			break;
		case SUBSC:
			PRINT(ENTER_DIM);
			break;
		case UNDERL:
			PRINT(ENTER_UNDERLINE);
			break;
		case BOLD:
			PRINT(ENTER_BOLD);
			break;
		default:
			/*
			 * We should have some provision here for multiple modes
			 * on at once.  This will have to come later.
			 */
			PRINT(ENTER_STANDOUT);
			break;
		}
	}
	curmode = newmode;
}
Commit	Line	Data
acd94da7 WJ	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#ifndef lint
	35	char copyright[] =
	36	"@(#) Copyright (c) 1980 Regents of the University of California.\n\
	37	All rights reserved.\n";
	38	#endif /* not lint */
	39
	40	#ifndef lint
	41	static char sccsid[] = "@(#)ul.c 5.7 (Berkeley) 2/2/91";
	42	#endif /* not lint */
	43
	44	#include <stdio.h>
	45
	46	#define IESC '\033'
	47	#define SO '\016'
	48	#define SI '\017'
	49	#define HFWD '9'
	50	#define HREV '8'
	51	#define FREV '7'
	52	#define MAXBUF 512
	53
	54	#define NORMAL 000
	55	#define ALTSET 001 /* Reverse */
	56	#define SUPERSC 002 /* Dim */
	57	#define SUBSC 004 /* Dim \| Ul */
	58	#define UNDERL 010 /* Ul */
	59	#define BOLD 020 /* Bold */
	60
	61	int must_use_uc, must_overstrike;
	62	char CURS_UP, CURS_RIGHT, *CURS_LEFT,
	63	ENTER_STANDOUT, EXIT_STANDOUT, ENTER_UNDERLINE, EXIT_UNDERLINE,
	64	ENTER_DIM, ENTER_BOLD, ENTER_REVERSE, UNDER_CHAR, *EXIT_ATTRIBUTES;
65
66	struct CHAR {
67	char c_mode;
68	char c_char;
69	} ;
70
71	struct CHAR obuf[MAXBUF];
72	int col, maxcol;
73	int mode;
74	int halfpos;
75	int upln;
76	int iflag;
77
78	int outchar();
79	#define PRINT(s) if (s == NULL) /* void */; else tputs(s, 1, outchar)
80
81	main(argc, argv)
82	int argc;
83	char **argv;
84	{
85	extern int optind;
86	extern char *optarg;
87	int c;
88	char *termtype;
89	FILE *f;
90	char termcap[1024];
91	char getenv(), strcpy();
92
93	termtype = getenv("TERM");
94	if (termtype == NULL \|\| (argv[0][0] == 'c' && !isatty(1)))
95	termtype = "lpr";
96	while ((c=getopt(argc, argv, "it:T:")) != EOF)
97	switch(c) {
98
99	case 't':
100	case 'T': /* for nroff compatibility */
101	termtype = optarg;
102	break;
103	case 'i':
104	iflag = 1;
105	break;
106
107	default:
108	fprintf(stderr,
109	"usage: %s [ -i ] [ -tTerm ] file...\n",
110	argv[0]);
111	exit(1);
112	}
113
114	switch(tgetent(termcap, termtype)) {
115
116	case 1:
117	break;
118
119	default:
120	fprintf(stderr,"trouble reading termcap");
121	/* fall through to ... */
122
123	case 0:
124	/* No such terminal type - assume dumb */
125	(void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:");
126	break;
127	}
128	initcap();
129	if ( (tgetflag("os") && ENTER_BOLD==NULL ) \|\|
130	(tgetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL))
131	must_overstrike = 1;
132	initbuf();
133	if (optind == argc)
134	filter(stdin);
135	else for (; optind<argc; optind++) {
136	f = fopen(argv[optind],"r");
137	if (f == NULL) {
138	perror(argv[optind]);
139	exit(1);
140	} else
141	filter(f);
142	}
143	exit(0);
144	}
145
146	filter(f)
147	FILE *f;
148	{
149	register c;
150
151	while ((c = getc(f)) != EOF) switch(c) {
152
153	case '\b':
154	if (col > 0)
155	col--;
156	continue;
157
158	case '\t':
159	col = (col+8) & ~07;
160	if (col > maxcol)
161	maxcol = col;
162	continue;
163
164	case '\r':
165	col = 0;
166	continue;
167
168	case SO:
169	mode \|= ALTSET;
170	continue;
171
172	case SI:
173	mode &= ~ALTSET;
174	continue;
175
176	case IESC:
177	switch (c = getc(f)) {
178
179	case HREV:
180	if (halfpos == 0) {
181	mode \|= SUPERSC;
182	halfpos--;
183	} else if (halfpos > 0) {
184	mode &= ~SUBSC;
185	halfpos--;
186	} else {
187	halfpos = 0;
188	reverse();
189	}
190	continue;
191
192	case HFWD:
193	if (halfpos == 0) {
194	mode \|= SUBSC;
195	halfpos++;
196	} else if (halfpos < 0) {
197	mode &= ~SUPERSC;
198	halfpos++;
199	} else {
200	halfpos = 0;
201	fwd();
202	}
203	continue;
204
205	case FREV:
206	reverse();
207	continue;
208
209	default:
210	fprintf(stderr,
211	"Unknown escape sequence in input: %o, %o\n",
212	IESC, c);
213	exit(1);
214	}
215	continue;
216
217	case '_':
218	if (obuf[col].c_char)
219	obuf[col].c_mode \|= UNDERL \| mode;
220	else
221	obuf[col].c_char = '_';
222	case ' ':
223	col++;
224	if (col > maxcol)
225	maxcol = col;
226	continue;
227
228	case '\n':
229	flushln();
230	continue;
231
232	case '\f':
233	flushln();
234	putchar('\f');
235	continue;
236
237	default:
238	if (c < ' ') /* non printing */
239	continue;
240	if (obuf[col].c_char == '\0') {
241	obuf[col].c_char = c;
242	obuf[col].c_mode = mode;
243	} else if (obuf[col].c_char == '_') {
244	obuf[col].c_char = c;
245	obuf[col].c_mode \|= UNDERL\|mode;
246	} else if (obuf[col].c_char == c)
247	obuf[col].c_mode \|= BOLD\|mode;
248	else
249	obuf[col].c_mode = mode;
250	col++;
251	if (col > maxcol)
252	maxcol = col;
253	continue;
254	}
255	if (maxcol)
256	flushln();
257	}
258
259	flushln()
260	{
261	register lastmode;
262	register i;
263	int hadmodes = 0;
264
265	lastmode = NORMAL;
266	for (i=0; i<maxcol; i++) {
267	if (obuf[i].c_mode != lastmode) {
268	hadmodes++;
269	setmode(obuf[i].c_mode);
270	lastmode = obuf[i].c_mode;
271	}
272	if (obuf[i].c_char == '\0') {
273	if (upln)
274	PRINT(CURS_RIGHT);
275	else
276	outc(' ');
277	} else
278	outc(obuf[i].c_char);
279	}
280	if (lastmode != NORMAL) {
281	setmode(0);
282	}
283	if (must_overstrike && hadmodes)
284	overstrike();
285	putchar('\n');
286	if (iflag && hadmodes)
287	iattr();
288	(void)fflush(stdout);
289	if (upln)
290	upln--;
291	initbuf();
292	}
293
294	/*
295	* For terminals that can overstrike, overstrike underlines and bolds.
296	* We don't do anything with halfline ups and downs, or Greek.
297	*/
298	overstrike()
299	{
300	register int i;
301	char lbuf[256];
302	register char *cp = lbuf;
303	int hadbold=0;
304
305	/* Set up overstrike buffer */
306	for (i=0; i<maxcol; i++)
307	switch (obuf[i].c_mode) {
308	case NORMAL:
309	default:
310	*cp++ = ' ';
311	break;
312	case UNDERL:
313	*cp++ = '_';
314	break;
315	case BOLD:
316	*cp++ = obuf[i].c_char;
317	hadbold=1;
318	break;
319	}
320	putchar('\r');
321	for (cp=' '; cp==' '; cp--)
322	*cp = 0;
323	for (cp=lbuf; *cp; cp++)
324	putchar(*cp);
325	if (hadbold) {
326	putchar('\r');
327	for (cp=lbuf; *cp; cp++)
328	putchar(cp=='_' ? ' ' : cp);
329	putchar('\r');
330	for (cp=lbuf; *cp; cp++)
331	putchar(cp=='_' ? ' ' : cp);
332	}
333	}
334
335	iattr()
336	{
337	register int i;
338	char lbuf[256];
339	register char *cp = lbuf;
340
341	for (i=0; i<maxcol; i++)
342	switch (obuf[i].c_mode) {
343	case NORMAL: *cp++ = ' '; break;
344	case ALTSET: *cp++ = 'g'; break;
345	case SUPERSC: *cp++ = '^'; break;
346	case SUBSC: *cp++ = 'v'; break;
347	case UNDERL: *cp++ = '_'; break;
348	case BOLD: *cp++ = '!'; break;
349	default: *cp++ = 'X'; break;
350	}
351	for (cp=' '; cp==' '; cp--)
352	*cp = 0;
353	for (cp=lbuf; *cp; cp++)
354	putchar(*cp);
355	putchar('\n');
356	}
357
358	initbuf()
359	{
360
361	bzero((char )obuf, sizeof (obuf)); / depends on NORMAL == 0 */
362	col = 0;
363	maxcol = 0;
364	mode &= ALTSET;
365	}
366
367	fwd()
368	{
369	register oldcol, oldmax;
370
371	oldcol = col;
372	oldmax = maxcol;
373	flushln();
374	col = oldcol;
375	maxcol = oldmax;
376	}
377
378	reverse()
379	{
380	upln++;
381	fwd();
382	PRINT(CURS_UP);
383	PRINT(CURS_UP);
384	upln++;
385	}
386
387	initcap()
388	{
389	static char tcapbuf[512];
390	char *bp = tcapbuf;
391	char getenv(), tgetstr();
392
393	/* This nonsense attempts to work with both old and new termcap */
394	CURS_UP = tgetstr("up", &bp);
395	CURS_RIGHT = tgetstr("ri", &bp);
396	if (CURS_RIGHT == NULL)
397	CURS_RIGHT = tgetstr("nd", &bp);
398	CURS_LEFT = tgetstr("le", &bp);
399	if (CURS_LEFT == NULL)
400	CURS_LEFT = tgetstr("bc", &bp);
401	if (CURS_LEFT == NULL && tgetflag("bs"))
402	CURS_LEFT = "\b";
403
404	ENTER_STANDOUT = tgetstr("so", &bp);
405	EXIT_STANDOUT = tgetstr("se", &bp);
406	ENTER_UNDERLINE = tgetstr("us", &bp);
407	EXIT_UNDERLINE = tgetstr("ue", &bp);
408	ENTER_DIM = tgetstr("mh", &bp);
409	ENTER_BOLD = tgetstr("md", &bp);
410	ENTER_REVERSE = tgetstr("mr", &bp);
411	EXIT_ATTRIBUTES = tgetstr("me", &bp);
412
413	if (!ENTER_BOLD && ENTER_REVERSE)
414	ENTER_BOLD = ENTER_REVERSE;
415	if (!ENTER_BOLD && ENTER_STANDOUT)
416	ENTER_BOLD = ENTER_STANDOUT;
417	if (!ENTER_UNDERLINE && ENTER_STANDOUT) {
418	ENTER_UNDERLINE = ENTER_STANDOUT;
419	EXIT_UNDERLINE = EXIT_STANDOUT;
420	}
421	if (!ENTER_DIM && ENTER_STANDOUT)
422	ENTER_DIM = ENTER_STANDOUT;
423	if (!ENTER_REVERSE && ENTER_STANDOUT)
424	ENTER_REVERSE = ENTER_STANDOUT;
425	if (!EXIT_ATTRIBUTES && EXIT_STANDOUT)
426	EXIT_ATTRIBUTES = EXIT_STANDOUT;
427
428	/*
429	* Note that we use REVERSE for the alternate character set,
430	* not the as/ae capabilities. This is because we are modelling
431	* the model 37 teletype (since that's what nroff outputs) and
432	* the typical as/ae is more of a graphics set, not the greek
433	* letters the 37 has.
434	*/
435
436	UNDER_CHAR = tgetstr("uc", &bp);
437	must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE);
438	}
439
440	outchar(c)
441	int c;
442	{
443	putchar(c & 0177);
444	}
445
446	static int curmode = 0;
447
448	outc(c)
449	int c;
450	{
451	putchar(c);
452	if (must_use_uc && (curmode&UNDERL)) {
453	PRINT(CURS_LEFT);
454	PRINT(UNDER_CHAR);
455	}
456	}
457
458	setmode(newmode)
459	int newmode;
460	{
461	if (!iflag) {
462	if (curmode != NORMAL && newmode != NORMAL)
463	setmode(NORMAL);
464	switch (newmode) {
465	case NORMAL:
466	switch(curmode) {
467	case NORMAL:
468	break;
469	case UNDERL:
470	PRINT(EXIT_UNDERLINE);
471	break;
472	default:
473	/* This includes standout */
474	PRINT(EXIT_ATTRIBUTES);
475	break;
476	}
477	break;
478	case ALTSET:
479	PRINT(ENTER_REVERSE);
480	break;
481	case SUPERSC:
482	/*
483	* This only works on a few terminals.
484	* It should be fixed.
485	*/
486	PRINT(ENTER_UNDERLINE);
487	PRINT(ENTER_DIM);
488	break;
489	case SUBSC:
490	PRINT(ENTER_DIM);
491	break;
492	case UNDERL:
493	PRINT(ENTER_UNDERLINE);
494	break;
495	case BOLD:
496	PRINT(ENTER_BOLD);
497	break;
498	default:
499	/*
500	* We should have some provision here for multiple modes
501	* on at once. This will have to come later.
502	*/
503	PRINT(ENTER_STANDOUT);
504	break;
505	}
506	}
507	curmode = newmode;
508	}