]> git.cameronkatri.com Git - mandoc.git/blob - term.c
git.ckatri.com / mandoc.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
add about 15 missing character escape sequences found in groff_char(7);
[mandoc.git] / term.c
1 /* $Id: term.c,v 1.261 2017/06/01 19:05:37 schwarze Exp $ */
2 /*
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #include "config.h"
19
20 #include <sys/types.h>
21
22 #include <assert.h>
23 #include <ctype.h>
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27
28 #include "mandoc.h"
29 #include "mandoc_aux.h"
30 #include "out.h"
31 #include "term.h"
32 #include "main.h"
33
34 static size_t cond_width(const struct termp *, int, int *);
35 static void adjbuf(struct termp *p, size_t);
36 static void bufferc(struct termp *, char);
37 static void encode(struct termp *, const char *, size_t);
38 static void encode1(struct termp *, int);
39
40
41 void
42 term_free(struct termp *p)
43 {
44
45 free(p->buf);
46 free(p->fontq);
47 free(p);
48 }
49
50 void
51 term_begin(struct termp *p, term_margin head,
52 term_margin foot, const struct roff_meta *arg)
53 {
54
55 p->headf = head;
56 p->footf = foot;
57 p->argf = arg;
58 (*p->begin)(p);
59 }
60
61 void
62 term_end(struct termp *p)
63 {
64
65 (*p->end)(p);
66 }
67
68 /*
69 * Flush a chunk of text. By default, break the output line each time
70 * the right margin is reached, and continue output on the next line
71 * at the same offset as the chunk itself. By default, also break the
72 * output line at the end of the chunk.
73 * The following flags may be specified:
74 *
75 * - TERMP_NOBREAK: Do not break the output line at the right margin,
76 * but only at the max right margin. Also, do not break the output
77 * line at the end of the chunk, such that the next call can pad to
78 * the next column. However, if less than p->trailspace blanks,
79 * which can be 0, 1, or 2, remain to the right margin, the line
80 * will be broken.
81 * - TERMP_BRTRSP: Consider trailing whitespace significant
82 * when deciding whether the chunk fits or not.
83 * - TERMP_BRIND: If the chunk does not fit and the output line has
84 * to be broken, start the next line at the right margin instead
85 * of at the offset. Used together with TERMP_NOBREAK for the tags
86 * in various kinds of tagged lists.
87 * - TERMP_DANGLE: Do not break the output line at the right margin,
88 * append the next chunk after it even if this one is too long.
89 * To be used together with TERMP_NOBREAK.
90 * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
91 * the next chunk if this column is not full.
92 */
93 void
94 term_flushln(struct termp *p)
95 {
96 size_t i; /* current input position in p->buf */
97 int ntab; /* number of tabs to prepend */
98 size_t vis; /* current visual position on output */
99 size_t vbl; /* number of blanks to prepend to output */
100 size_t vend; /* end of word visual position on output */
101 size_t bp; /* visual right border position */
102 size_t dv; /* temporary for visual pos calculations */
103 size_t j; /* temporary loop index for p->buf */
104 size_t jhy; /* last hyph before overflow w/r/t j */
105 size_t maxvis; /* output position of visible boundary */
106
107 /*
108 * First, establish the maximum columns of "visible" content.
109 * This is usually the difference between the right-margin and
110 * an indentation, but can be, for tagged lists or columns, a
111 * small set of values.
112 *
113 * The following unsigned-signed subtractions look strange,
114 * but they are actually correct. If the int p->overstep
115 * is negative, it gets sign extended. Subtracting that
116 * very large size_t effectively adds a small number to dv.
117 */
118 dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0;
119 maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
120
121 if (p->flags & TERMP_NOBREAK) {
122 dv = p->maxrmargin > p->offset ?
123 p->maxrmargin - p->offset : 0;
124 bp = (int)dv > p->overstep ?
125 dv - (size_t)p->overstep : 0;
126 } else
127 bp = maxvis;
128
129 /*
130 * Calculate the required amount of padding.
131 */
132 vbl = p->offset + p->overstep > p->viscol ?
133 p->offset + p->overstep - p->viscol : 0;
134
135 vis = vend = 0;
136 i = 0;
137
138 while (i < p->col) {
139 /*
140 * Handle literal tab characters: collapse all
141 * subsequent tabs into a single huge set of spaces.
142 */
143 ntab = 0;
144 while (i < p->col && p->buf[i] == '\t') {
145 vend = term_tab_next(vis);
146 vbl += vend - vis;
147 vis = vend;
148 ntab++;
149 i++;
150 }
151
152 /*
153 * Count up visible word characters. Control sequences
154 * (starting with the CSI) aren't counted. A space
155 * generates a non-printing word, which is valid (the
156 * space is printed according to regular spacing rules).
157 */
158
159 for (j = i, jhy = 0; j < p->col; j++) {
160 if (' ' == p->buf[j] || '\t' == p->buf[j])
161 break;
162
163 /* Back over the last printed character. */
164 if (8 == p->buf[j]) {
165 assert(j);
166 vend -= (*p->width)(p, p->buf[j - 1]);
167 continue;
168 }
169
170 /* Regular word. */
171 /* Break at the hyphen point if we overrun. */
172 if (vend > vis && vend < bp &&
173 (ASCII_HYPH == p->buf[j] ||
174 ASCII_BREAK == p->buf[j]))
175 jhy = j;
176
177 /*
178 * Hyphenation now decided, put back a real
179 * hyphen such that we get the correct width.
180 */
181 if (ASCII_HYPH == p->buf[j])
182 p->buf[j] = '-';
183
184 vend += (*p->width)(p, p->buf[j]);
185 }
186
187 /*
188 * Find out whether we would exceed the right margin.
189 * If so, break to the next line.
190 */
191 if (vend > bp && 0 == jhy && vis > 0) {
192 vend -= vis;
193 (*p->endline)(p);
194 p->viscol = 0;
195
196 /* Use pending tabs on the new line. */
197
198 vbl = 0;
199 while (ntab--)
200 vbl = term_tab_next(vbl);
201
202 /* Re-establish indentation. */
203
204 if (p->flags & TERMP_BRIND) {
205 vbl += p->rmargin;
206 vend += p->rmargin - p->offset;
207 } else
208 vbl += p->offset;
209
210 /*
211 * Remove the p->overstep width.
212 * Again, if p->overstep is negative,
213 * sign extension does the right thing.
214 */
215
216 bp += (size_t)p->overstep;
217 p->overstep = 0;
218 }
219
220 /* Write out the [remaining] word. */
221 for ( ; i < p->col; i++) {
222 if (vend > bp && jhy > 0 && i > jhy)
223 break;
224 if ('\t' == p->buf[i])
225 break;
226 if (' ' == p->buf[i]) {
227 j = i;
228 while (i < p->col && ' ' == p->buf[i])
229 i++;
230 dv = (i - j) * (*p->width)(p, ' ');
231 vbl += dv;
232 vend += dv;
233 break;
234 }
235 if (ASCII_NBRSP == p->buf[i]) {
236 vbl += (*p->width)(p, ' ');
237 continue;
238 }
239 if (ASCII_BREAK == p->buf[i])
240 continue;
241
242 /*
243 * Now we definitely know there will be
244 * printable characters to output,
245 * so write preceding white space now.
246 */
247 if (vbl) {
248 (*p->advance)(p, vbl);
249 p->viscol += vbl;
250 vbl = 0;
251 }
252
253 (*p->letter)(p, p->buf[i]);
254 if (8 == p->buf[i])
255 p->viscol -= (*p->width)(p, p->buf[i-1]);
256 else
257 p->viscol += (*p->width)(p, p->buf[i]);
258 }
259 vis = vend;
260 }
261
262 /*
263 * If there was trailing white space, it was not printed;
264 * so reset the cursor position accordingly.
265 */
266 if (vis > vbl)
267 vis -= vbl;
268 else
269 vis = 0;
270
271 p->col = 0;
272 p->overstep = 0;
273 p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE);
274
275 if ( ! (TERMP_NOBREAK & p->flags)) {
276 p->viscol = 0;
277 (*p->endline)(p);
278 return;
279 }
280
281 if (TERMP_HANG & p->flags) {
282 p->overstep += (int)(p->offset + vis - p->rmargin +
283 p->trailspace * (*p->width)(p, ' '));
284
285 /*
286 * If we have overstepped the margin, temporarily move
287 * it to the right and flag the rest of the line to be
288 * shorter.
289 * If there is a request to keep the columns together,
290 * allow negative overstep when the column is not full.
291 */
292 if (p->trailspace && p->overstep < 0)
293 p->overstep = 0;
294 return;
295
296 } else if (TERMP_DANGLE & p->flags)
297 return;
298
299 /* Trailing whitespace is significant in some columns. */
300 if (vis && vbl && (TERMP_BRTRSP & p->flags))
301 vis += vbl;
302
303 /* If the column was overrun, break the line. */
304 if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
305 (*p->endline)(p);
306 p->viscol = 0;
307 }
308 }
309
310 /*
311 * A newline only breaks an existing line; it won't assert vertical
312 * space. All data in the output buffer is flushed prior to the newline
313 * assertion.
314 */
315 void
316 term_newln(struct termp *p)
317 {
318
319 p->flags |= TERMP_NOSPACE;
320 if (p->col || p->viscol)
321 term_flushln(p);
322 }
323
324 /*
325 * Asserts a vertical space (a full, empty line-break between lines).
326 * Note that if used twice, this will cause two blank spaces and so on.
327 * All data in the output buffer is flushed prior to the newline
328 * assertion.
329 */
330 void
331 term_vspace(struct termp *p)
332 {
333
334 term_newln(p);
335 p->viscol = 0;
336 if (0 < p->skipvsp)
337 p->skipvsp--;
338 else
339 (*p->endline)(p);
340 }
341
342 /* Swap current and previous font; for \fP and .ft P */
343 void
344 term_fontlast(struct termp *p)
345 {
346 enum termfont f;
347
348 f = p->fontl;
349 p->fontl = p->fontq[p->fonti];
350 p->fontq[p->fonti] = f;
351 }
352
353 /* Set font, save current, discard previous; for \f, .ft, .B etc. */
354 void
355 term_fontrepl(struct termp *p, enum termfont f)
356 {
357
358 p->fontl = p->fontq[p->fonti];
359 p->fontq[p->fonti] = f;
360 }
361
362 /* Set font, save previous. */
363 void
364 term_fontpush(struct termp *p, enum termfont f)
365 {
366
367 p->fontl = p->fontq[p->fonti];
368 if (++p->fonti == p->fontsz) {
369 p->fontsz += 8;
370 p->fontq = mandoc_reallocarray(p->fontq,
371 p->fontsz, sizeof(*p->fontq));
372 }
373 p->fontq[p->fonti] = f;
374 }
375
376 /* Flush to make the saved pointer current again. */
377 void
378 term_fontpopq(struct termp *p, int i)
379 {
380
381 assert(i >= 0);
382 if (p->fonti > i)
383 p->fonti = i;
384 }
385
386 /* Pop one font off the stack. */
387 void
388 term_fontpop(struct termp *p)
389 {
390
391 assert(p->fonti);
392 p->fonti--;
393 }
394
395 /*
396 * Handle pwords, partial words, which may be either a single word or a
397 * phrase that cannot be broken down (such as a literal string). This
398 * handles word styling.
399 */
400 void
401 term_word(struct termp *p, const char *word)
402 {
403 struct roffsu su;
404 const char nbrsp[2] = { ASCII_NBRSP, 0 };
405 const char *seq, *cp;
406 int sz, uc;
407 size_t ssz;
408 enum mandoc_esc esc;
409
410 if ( ! (TERMP_NOSPACE & p->flags)) {
411 if ( ! (TERMP_KEEP & p->flags)) {
412 bufferc(p, ' ');
413 if (TERMP_SENTENCE & p->flags)
414 bufferc(p, ' ');
415 } else
416 bufferc(p, ASCII_NBRSP);
417 }
418 if (TERMP_PREKEEP & p->flags)
419 p->flags |= TERMP_KEEP;
420
421 if ( ! (p->flags & TERMP_NONOSPACE))
422 p->flags &= ~TERMP_NOSPACE;
423 else
424 p->flags |= TERMP_NOSPACE;
425
426 p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
427 p->skipvsp = 0;
428
429 while ('\0' != *word) {
430 if ('\\' != *word) {
431 if (TERMP_NBRWORD & p->flags) {
432 if (' ' == *word) {
433 encode(p, nbrsp, 1);
434 word++;
435 continue;
436 }
437 ssz = strcspn(word, "\\ ");
438 } else
439 ssz = strcspn(word, "\\");
440 encode(p, word, ssz);
441 word += (int)ssz;
442 continue;
443 }
444
445 word++;
446 esc = mandoc_escape(&word, &seq, &sz);
447 if (ESCAPE_ERROR == esc)
448 continue;
449
450 switch (esc) {
451 case ESCAPE_UNICODE:
452 uc = mchars_num2uc(seq + 1, sz - 1);
453 break;
454 case ESCAPE_NUMBERED:
455 uc = mchars_num2char(seq, sz);
456 if (uc < 0)
457 continue;
458 break;
459 case ESCAPE_SPECIAL:
460 if (p->enc == TERMENC_ASCII) {
461 cp = mchars_spec2str(seq, sz, &ssz);
462 if (cp != NULL)
463 encode(p, cp, ssz);
464 } else {
465 uc = mchars_spec2cp(seq, sz);
466 if (uc > 0)
467 encode1(p, uc);
468 }
469 continue;
470 case ESCAPE_FONTBOLD:
471 term_fontrepl(p, TERMFONT_BOLD);
472 continue;
473 case ESCAPE_FONTITALIC:
474 term_fontrepl(p, TERMFONT_UNDER);
475 continue;
476 case ESCAPE_FONTBI:
477 term_fontrepl(p, TERMFONT_BI);
478 continue;
479 case ESCAPE_FONT:
480 case ESCAPE_FONTROMAN:
481 term_fontrepl(p, TERMFONT_NONE);
482 continue;
483 case ESCAPE_FONTPREV:
484 term_fontlast(p);
485 continue;
486 case ESCAPE_NOSPACE:
487 if (p->flags & TERMP_BACKAFTER)
488 p->flags &= ~TERMP_BACKAFTER;
489 else if (*word == '\0')
490 p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
491 continue;
492 case ESCAPE_HORIZ:
493 if (a2roffsu(seq, &su, SCALE_EM) == 0)
494 continue;
495 uc = term_hspan(p, &su) / 24;
496 if (uc > 0)
497 while (uc-- > 0)
498 bufferc(p, ASCII_NBRSP);
499 else if (p->col > (size_t)(-uc))
500 p->col += uc;
501 else {
502 uc += p->col;
503 p->col = 0;
504 if (p->offset > (size_t)(-uc)) {
505 p->ti += uc;
506 p->offset += uc;
507 } else {
508 p->ti -= p->offset;
509 p->offset = 0;
510 }
511 }
512 continue;
513 case ESCAPE_SKIPCHAR:
514 p->flags |= TERMP_BACKAFTER;
515 continue;
516 case ESCAPE_OVERSTRIKE:
517 cp = seq + sz;
518 while (seq < cp) {
519 if (*seq == '\\') {
520 mandoc_escape(&seq, NULL, NULL);
521 continue;
522 }
523 encode1(p, *seq++);
524 if (seq < cp) {
525 if (p->flags & TERMP_BACKBEFORE)
526 p->flags |= TERMP_BACKAFTER;
527 else
528 p->flags |= TERMP_BACKBEFORE;
529 }
530 }
531 /* Trim trailing backspace/blank pair. */
532 if (p->col > 2 &&
533 (p->buf[p->col - 1] == ' ' ||
534 p->buf[p->col - 1] == '\t'))
535 p->col -= 2;
536 continue;
537 default:
538 continue;
539 }
540
541 /*
542 * Common handling for Unicode and numbered
543 * character escape sequences.
544 */
545
546 if (p->enc == TERMENC_ASCII) {
547 cp = ascii_uc2str(uc);
548 encode(p, cp, strlen(cp));
549 } else {
550 if ((uc < 0x20 && uc != 0x09) ||
551 (uc > 0x7E && uc < 0xA0))
552 uc = 0xFFFD;
553 encode1(p, uc);
554 }
555 }
556 p->flags &= ~TERMP_NBRWORD;
557 }
558
559 static void
560 adjbuf(struct termp *p, size_t sz)
561 {
562
563 if (0 == p->maxcols)
564 p->maxcols = 1024;
565 while (sz >= p->maxcols)
566 p->maxcols <<= 2;
567
568 p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
569 }
570
571 static void
572 bufferc(struct termp *p, char c)
573 {
574
575 if (p->col + 1 >= p->maxcols)
576 adjbuf(p, p->col + 1);
577
578 p->buf[p->col++] = c;
579 }
580
581 /*
582 * See encode().
583 * Do this for a single (probably unicode) value.
584 * Does not check for non-decorated glyphs.
585 */
586 static void
587 encode1(struct termp *p, int c)
588 {
589 enum termfont f;
590
591 if (p->col + 7 >= p->maxcols)
592 adjbuf(p, p->col + 7);
593
594 f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
595 p->fontq[p->fonti] : TERMFONT_NONE;
596
597 if (p->flags & TERMP_BACKBEFORE) {
598 if (p->buf[p->col - 1] == ' ' || p->buf[p->col - 1] == '\t')
599 p->col--;
600 else
601 p->buf[p->col++] = 8;
602 p->flags &= ~TERMP_BACKBEFORE;
603 }
604 if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
605 p->buf[p->col++] = '_';
606 p->buf[p->col++] = 8;
607 }
608 if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
609 if (ASCII_HYPH == c)
610 p->buf[p->col++] = '-';
611 else
612 p->buf[p->col++] = c;
613 p->buf[p->col++] = 8;
614 }
615 p->buf[p->col++] = c;
616 if (p->flags & TERMP_BACKAFTER) {
617 p->flags |= TERMP_BACKBEFORE;
618 p->flags &= ~TERMP_BACKAFTER;
619 }
620 }
621
622 static void
623 encode(struct termp *p, const char *word, size_t sz)
624 {
625 size_t i;
626
627 if (p->col + 2 + (sz * 5) >= p->maxcols)
628 adjbuf(p, p->col + 2 + (sz * 5));
629
630 for (i = 0; i < sz; i++) {
631 if (ASCII_HYPH == word[i] ||
632 isgraph((unsigned char)word[i]))
633 encode1(p, word[i]);
634 else {
635 p->buf[p->col++] = word[i];
636
637 /*
638 * Postpone the effect of \z while handling
639 * an overstrike sequence from ascii_uc2str().
640 */
641
642 if (word[i] == '\b' &&
643 (p->flags & TERMP_BACKBEFORE)) {
644 p->flags &= ~TERMP_BACKBEFORE;
645 p->flags |= TERMP_BACKAFTER;
646 }
647 }
648 }
649 }
650
651 void
652 term_setwidth(struct termp *p, const char *wstr)
653 {
654 struct roffsu su;
655 int iop, width;
656
657 iop = 0;
658 width = 0;
659 if (NULL != wstr) {
660 switch (*wstr) {
661 case '+':
662 iop = 1;
663 wstr++;
664 break;
665 case '-':
666 iop = -1;
667 wstr++;
668 break;
669 default:
670 break;
671 }
672 if (a2roffsu(wstr, &su, SCALE_MAX))
673 width = term_hspan(p, &su);
674 else
675 iop = 0;
676 }
677 (*p->setwidth)(p, iop, width);
678 }
679
680 size_t
681 term_len(const struct termp *p, size_t sz)
682 {
683
684 return (*p->width)(p, ' ') * sz;
685 }
686
687 static size_t
688 cond_width(const struct termp *p, int c, int *skip)
689 {
690
691 if (*skip) {
692 (*skip) = 0;
693 return 0;
694 } else
695 return (*p->width)(p, c);
696 }
697
698 size_t
699 term_strlen(const struct termp *p, const char *cp)
700 {
701 size_t sz, rsz, i;
702 int ssz, skip, uc;
703 const char *seq, *rhs;
704 enum mandoc_esc esc;
705 static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
706 ASCII_BREAK, '\0' };
707
708 /*
709 * Account for escaped sequences within string length
710 * calculations. This follows the logic in term_word() as we
711 * must calculate the width of produced strings.
712 */
713
714 sz = 0;
715 skip = 0;
716 while ('\0' != *cp) {
717 rsz = strcspn(cp, rej);
718 for (i = 0; i < rsz; i++)
719 sz += cond_width(p, *cp++, &skip);
720
721 switch (*cp) {
722 case '\\':
723 cp++;
724 esc = mandoc_escape(&cp, &seq, &ssz);
725 if (ESCAPE_ERROR == esc)
726 continue;
727
728 rhs = NULL;
729
730 switch (esc) {
731 case ESCAPE_UNICODE:
732 uc = mchars_num2uc(seq + 1, ssz - 1);
733 break;
734 case ESCAPE_NUMBERED:
735 uc = mchars_num2char(seq, ssz);
736 if (uc < 0)
737 continue;
738 break;
739 case ESCAPE_SPECIAL:
740 if (p->enc == TERMENC_ASCII) {
741 rhs = mchars_spec2str(seq, ssz, &rsz);
742 if (rhs != NULL)
743 break;
744 } else {
745 uc = mchars_spec2cp(seq, ssz);
746 if (uc > 0)
747 sz += cond_width(p, uc, &skip);
748 }
749 continue;
750 case ESCAPE_SKIPCHAR:
751 skip = 1;
752 continue;
753 case ESCAPE_OVERSTRIKE:
754 rsz = 0;
755 rhs = seq + ssz;
756 while (seq < rhs) {
757 if (*seq == '\\') {
758 mandoc_escape(&seq, NULL, NULL);
759 continue;
760 }
761 i = (*p->width)(p, *seq++);
762 if (rsz < i)
763 rsz = i;
764 }
765 sz += rsz;
766 continue;
767 default:
768 continue;
769 }
770
771 /*
772 * Common handling for Unicode and numbered
773 * character escape sequences.
774 */
775
776 if (rhs == NULL) {
777 if (p->enc == TERMENC_ASCII) {
778 rhs = ascii_uc2str(uc);
779 rsz = strlen(rhs);
780 } else {
781 if ((uc < 0x20 && uc != 0x09) ||
782 (uc > 0x7E && uc < 0xA0))
783 uc = 0xFFFD;
784 sz += cond_width(p, uc, &skip);
785 continue;
786 }
787 }
788
789 if (skip) {
790 skip = 0;
791 break;
792 }
793
794 /*
795 * Common handling for all escape sequences
796 * printing more than one character.
797 */
798
799 for (i = 0; i < rsz; i++)
800 sz += (*p->width)(p, *rhs++);
801 break;
802 case ASCII_NBRSP:
803 sz += cond_width(p, ' ', &skip);
804 cp++;
805 break;
806 case ASCII_HYPH:
807 sz += cond_width(p, '-', &skip);
808 cp++;
809 break;
810 default:
811 break;
812 }
813 }
814
815 return sz;
816 }
817
818 int
819 term_vspan(const struct termp *p, const struct roffsu *su)
820 {
821 double r;
822 int ri;
823
824 switch (su->unit) {
825 case SCALE_BU:
826 r = su->scale / 40.0;
827 break;
828 case SCALE_CM:
829 r = su->scale * 6.0 / 2.54;
830 break;
831 case SCALE_FS:
832 r = su->scale * 65536.0 / 40.0;
833 break;
834 case SCALE_IN:
835 r = su->scale * 6.0;
836 break;
837 case SCALE_MM:
838 r = su->scale * 0.006;
839 break;
840 case SCALE_PC:
841 r = su->scale;
842 break;
843 case SCALE_PT:
844 r = su->scale / 12.0;
845 break;
846 case SCALE_EN:
847 case SCALE_EM:
848 r = su->scale * 0.6;
849 break;
850 case SCALE_VS:
851 r = su->scale;
852 break;
853 default:
854 abort();
855 }
856 ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
857 return ri < 66 ? ri : 1;
858 }
859
860 /*
861 * Convert a scaling width to basic units, rounding down.
862 */
863 int
864 term_hspan(const struct termp *p, const struct roffsu *su)
865 {
866
867 return (*p->hspan)(p, su);
868 }
A git conversion mirror of mandoc.bsd.lv