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
main(argc,argv)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
filter(f)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
flushln()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 */
overstrike()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
iattr()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
initbuf()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
fwd()367 fwd()
368 {
369 register oldcol, oldmax;
370
371 oldcol = col;
372 oldmax = maxcol;
373 flushln();
374 col = oldcol;
375 maxcol = oldmax;
376 }
377
reverse()378 reverse()
379 {
380 upln++;
381 fwd();
382 PRINT(CURS_UP);
383 PRINT(CURS_UP);
384 upln++;
385 }
386
initcap()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
outchar(c)440 outchar(c)
441 int c;
442 {
443 putchar(c & 0177);
444 }
445
446 static int curmode = 0;
447
outc(c)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
setmode(newmode)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 }
509