1 /*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char copyright[] =
10 "@(#) Copyright (c) 1980, 1993\n\
11 The Regents of the University of California. All rights reserved.\n";
12 #endif /* not lint */
13
14 #ifndef lint
15 static char sccsid[] = "@(#)ul.c 8.1 (Berkeley) 06/06/93";
16 #endif /* not lint */
17
18 #include <stdio.h>
19
20 #define IESC '\033'
21 #define SO '\016'
22 #define SI '\017'
23 #define HFWD '9'
24 #define HREV '8'
25 #define FREV '7'
26 #define MAXBUF 512
27
28 #define NORMAL 000
29 #define ALTSET 001 /* Reverse */
30 #define SUPERSC 002 /* Dim */
31 #define SUBSC 004 /* Dim | Ul */
32 #define UNDERL 010 /* Ul */
33 #define BOLD 020 /* Bold */
34
35 int must_use_uc, must_overstrike;
36 char *CURS_UP, *CURS_RIGHT, *CURS_LEFT,
37 *ENTER_STANDOUT, *EXIT_STANDOUT, *ENTER_UNDERLINE, *EXIT_UNDERLINE,
38 *ENTER_DIM, *ENTER_BOLD, *ENTER_REVERSE, *UNDER_CHAR, *EXIT_ATTRIBUTES;
39
40 struct CHAR {
41 char c_mode;
42 char c_char;
43 } ;
44
45 struct CHAR obuf[MAXBUF];
46 int col, maxcol;
47 int mode;
48 int halfpos;
49 int upln;
50 int iflag;
51
52 int outchar();
53 #define PRINT(s) if (s == NULL) /* void */; else tputs(s, 1, outchar)
54
main(argc,argv)55 main(argc, argv)
56 int argc;
57 char **argv;
58 {
59 extern int optind;
60 extern char *optarg;
61 int c;
62 char *termtype;
63 FILE *f;
64 char termcap[1024];
65 char *getenv(), *strcpy();
66
67 termtype = getenv("TERM");
68 if (termtype == NULL || (argv[0][0] == 'c' && !isatty(1)))
69 termtype = "lpr";
70 while ((c=getopt(argc, argv, "it:T:")) != EOF)
71 switch(c) {
72
73 case 't':
74 case 'T': /* for nroff compatibility */
75 termtype = optarg;
76 break;
77 case 'i':
78 iflag = 1;
79 break;
80
81 default:
82 fprintf(stderr,
83 "usage: %s [ -i ] [ -tTerm ] file...\n",
84 argv[0]);
85 exit(1);
86 }
87
88 switch(tgetent(termcap, termtype)) {
89
90 case 1:
91 break;
92
93 default:
94 fprintf(stderr,"trouble reading termcap");
95 /* fall through to ... */
96
97 case 0:
98 /* No such terminal type - assume dumb */
99 (void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:");
100 break;
101 }
102 initcap();
103 if ( (tgetflag("os") && ENTER_BOLD==NULL ) ||
104 (tgetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL))
105 must_overstrike = 1;
106 initbuf();
107 if (optind == argc)
108 filter(stdin);
109 else for (; optind<argc; optind++) {
110 f = fopen(argv[optind],"r");
111 if (f == NULL) {
112 perror(argv[optind]);
113 exit(1);
114 } else
115 filter(f);
116 }
117 exit(0);
118 }
119
filter(f)120 filter(f)
121 FILE *f;
122 {
123 register c;
124
125 while ((c = getc(f)) != EOF) switch(c) {
126
127 case '\b':
128 if (col > 0)
129 col--;
130 continue;
131
132 case '\t':
133 col = (col+8) & ~07;
134 if (col > maxcol)
135 maxcol = col;
136 continue;
137
138 case '\r':
139 col = 0;
140 continue;
141
142 case SO:
143 mode |= ALTSET;
144 continue;
145
146 case SI:
147 mode &= ~ALTSET;
148 continue;
149
150 case IESC:
151 switch (c = getc(f)) {
152
153 case HREV:
154 if (halfpos == 0) {
155 mode |= SUPERSC;
156 halfpos--;
157 } else if (halfpos > 0) {
158 mode &= ~SUBSC;
159 halfpos--;
160 } else {
161 halfpos = 0;
162 reverse();
163 }
164 continue;
165
166 case HFWD:
167 if (halfpos == 0) {
168 mode |= SUBSC;
169 halfpos++;
170 } else if (halfpos < 0) {
171 mode &= ~SUPERSC;
172 halfpos++;
173 } else {
174 halfpos = 0;
175 fwd();
176 }
177 continue;
178
179 case FREV:
180 reverse();
181 continue;
182
183 default:
184 fprintf(stderr,
185 "Unknown escape sequence in input: %o, %o\n",
186 IESC, c);
187 exit(1);
188 }
189 continue;
190
191 case '_':
192 if (obuf[col].c_char)
193 obuf[col].c_mode |= UNDERL | mode;
194 else
195 obuf[col].c_char = '_';
196 case ' ':
197 col++;
198 if (col > maxcol)
199 maxcol = col;
200 continue;
201
202 case '\n':
203 flushln();
204 continue;
205
206 case '\f':
207 flushln();
208 putchar('\f');
209 continue;
210
211 default:
212 if (c < ' ') /* non printing */
213 continue;
214 if (obuf[col].c_char == '\0') {
215 obuf[col].c_char = c;
216 obuf[col].c_mode = mode;
217 } else if (obuf[col].c_char == '_') {
218 obuf[col].c_char = c;
219 obuf[col].c_mode |= UNDERL|mode;
220 } else if (obuf[col].c_char == c)
221 obuf[col].c_mode |= BOLD|mode;
222 else
223 obuf[col].c_mode = mode;
224 col++;
225 if (col > maxcol)
226 maxcol = col;
227 continue;
228 }
229 if (maxcol)
230 flushln();
231 }
232
flushln()233 flushln()
234 {
235 register lastmode;
236 register i;
237 int hadmodes = 0;
238
239 lastmode = NORMAL;
240 for (i=0; i<maxcol; i++) {
241 if (obuf[i].c_mode != lastmode) {
242 hadmodes++;
243 setmode(obuf[i].c_mode);
244 lastmode = obuf[i].c_mode;
245 }
246 if (obuf[i].c_char == '\0') {
247 if (upln)
248 PRINT(CURS_RIGHT);
249 else
250 outc(' ');
251 } else
252 outc(obuf[i].c_char);
253 }
254 if (lastmode != NORMAL) {
255 setmode(0);
256 }
257 if (must_overstrike && hadmodes)
258 overstrike();
259 putchar('\n');
260 if (iflag && hadmodes)
261 iattr();
262 (void)fflush(stdout);
263 if (upln)
264 upln--;
265 initbuf();
266 }
267
268 /*
269 * For terminals that can overstrike, overstrike underlines and bolds.
270 * We don't do anything with halfline ups and downs, or Greek.
271 */
overstrike()272 overstrike()
273 {
274 register int i;
275 char lbuf[256];
276 register char *cp = lbuf;
277 int hadbold=0;
278
279 /* Set up overstrike buffer */
280 for (i=0; i<maxcol; i++)
281 switch (obuf[i].c_mode) {
282 case NORMAL:
283 default:
284 *cp++ = ' ';
285 break;
286 case UNDERL:
287 *cp++ = '_';
288 break;
289 case BOLD:
290 *cp++ = obuf[i].c_char;
291 hadbold=1;
292 break;
293 }
294 putchar('\r');
295 for (*cp=' '; *cp==' '; cp--)
296 *cp = 0;
297 for (cp=lbuf; *cp; cp++)
298 putchar(*cp);
299 if (hadbold) {
300 putchar('\r');
301 for (cp=lbuf; *cp; cp++)
302 putchar(*cp=='_' ? ' ' : *cp);
303 putchar('\r');
304 for (cp=lbuf; *cp; cp++)
305 putchar(*cp=='_' ? ' ' : *cp);
306 }
307 }
308
iattr()309 iattr()
310 {
311 register int i;
312 char lbuf[256];
313 register char *cp = lbuf;
314
315 for (i=0; i<maxcol; i++)
316 switch (obuf[i].c_mode) {
317 case NORMAL: *cp++ = ' '; break;
318 case ALTSET: *cp++ = 'g'; break;
319 case SUPERSC: *cp++ = '^'; break;
320 case SUBSC: *cp++ = 'v'; break;
321 case UNDERL: *cp++ = '_'; break;
322 case BOLD: *cp++ = '!'; break;
323 default: *cp++ = 'X'; break;
324 }
325 for (*cp=' '; *cp==' '; cp--)
326 *cp = 0;
327 for (cp=lbuf; *cp; cp++)
328 putchar(*cp);
329 putchar('\n');
330 }
331
initbuf()332 initbuf()
333 {
334
335 bzero((char *)obuf, sizeof (obuf)); /* depends on NORMAL == 0 */
336 col = 0;
337 maxcol = 0;
338 mode &= ALTSET;
339 }
340
fwd()341 fwd()
342 {
343 register oldcol, oldmax;
344
345 oldcol = col;
346 oldmax = maxcol;
347 flushln();
348 col = oldcol;
349 maxcol = oldmax;
350 }
351
reverse()352 reverse()
353 {
354 upln++;
355 fwd();
356 PRINT(CURS_UP);
357 PRINT(CURS_UP);
358 upln++;
359 }
360
initcap()361 initcap()
362 {
363 static char tcapbuf[512];
364 char *bp = tcapbuf;
365 char *getenv(), *tgetstr();
366
367 /* This nonsense attempts to work with both old and new termcap */
368 CURS_UP = tgetstr("up", &bp);
369 CURS_RIGHT = tgetstr("ri", &bp);
370 if (CURS_RIGHT == NULL)
371 CURS_RIGHT = tgetstr("nd", &bp);
372 CURS_LEFT = tgetstr("le", &bp);
373 if (CURS_LEFT == NULL)
374 CURS_LEFT = tgetstr("bc", &bp);
375 if (CURS_LEFT == NULL && tgetflag("bs"))
376 CURS_LEFT = "\b";
377
378 ENTER_STANDOUT = tgetstr("so", &bp);
379 EXIT_STANDOUT = tgetstr("se", &bp);
380 ENTER_UNDERLINE = tgetstr("us", &bp);
381 EXIT_UNDERLINE = tgetstr("ue", &bp);
382 ENTER_DIM = tgetstr("mh", &bp);
383 ENTER_BOLD = tgetstr("md", &bp);
384 ENTER_REVERSE = tgetstr("mr", &bp);
385 EXIT_ATTRIBUTES = tgetstr("me", &bp);
386
387 if (!ENTER_BOLD && ENTER_REVERSE)
388 ENTER_BOLD = ENTER_REVERSE;
389 if (!ENTER_BOLD && ENTER_STANDOUT)
390 ENTER_BOLD = ENTER_STANDOUT;
391 if (!ENTER_UNDERLINE && ENTER_STANDOUT) {
392 ENTER_UNDERLINE = ENTER_STANDOUT;
393 EXIT_UNDERLINE = EXIT_STANDOUT;
394 }
395 if (!ENTER_DIM && ENTER_STANDOUT)
396 ENTER_DIM = ENTER_STANDOUT;
397 if (!ENTER_REVERSE && ENTER_STANDOUT)
398 ENTER_REVERSE = ENTER_STANDOUT;
399 if (!EXIT_ATTRIBUTES && EXIT_STANDOUT)
400 EXIT_ATTRIBUTES = EXIT_STANDOUT;
401
402 /*
403 * Note that we use REVERSE for the alternate character set,
404 * not the as/ae capabilities. This is because we are modelling
405 * the model 37 teletype (since that's what nroff outputs) and
406 * the typical as/ae is more of a graphics set, not the greek
407 * letters the 37 has.
408 */
409
410 UNDER_CHAR = tgetstr("uc", &bp);
411 must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE);
412 }
413
outchar(c)414 outchar(c)
415 int c;
416 {
417 putchar(c & 0177);
418 }
419
420 static int curmode = 0;
421
outc(c)422 outc(c)
423 int c;
424 {
425 putchar(c);
426 if (must_use_uc && (curmode&UNDERL)) {
427 PRINT(CURS_LEFT);
428 PRINT(UNDER_CHAR);
429 }
430 }
431
setmode(newmode)432 setmode(newmode)
433 int newmode;
434 {
435 if (!iflag) {
436 if (curmode != NORMAL && newmode != NORMAL)
437 setmode(NORMAL);
438 switch (newmode) {
439 case NORMAL:
440 switch(curmode) {
441 case NORMAL:
442 break;
443 case UNDERL:
444 PRINT(EXIT_UNDERLINE);
445 break;
446 default:
447 /* This includes standout */
448 PRINT(EXIT_ATTRIBUTES);
449 break;
450 }
451 break;
452 case ALTSET:
453 PRINT(ENTER_REVERSE);
454 break;
455 case SUPERSC:
456 /*
457 * This only works on a few terminals.
458 * It should be fixed.
459 */
460 PRINT(ENTER_UNDERLINE);
461 PRINT(ENTER_DIM);
462 break;
463 case SUBSC:
464 PRINT(ENTER_DIM);
465 break;
466 case UNDERL:
467 PRINT(ENTER_UNDERLINE);
468 break;
469 case BOLD:
470 PRINT(ENTER_BOLD);
471 break;
472 default:
473 /*
474 * We should have some provision here for multiple modes
475 * on at once. This will have to come later.
476 */
477 PRINT(ENTER_STANDOUT);
478 break;
479 }
480 }
481 curmode = newmode;
482 }
483