Annotation of mandoc/term.c, Revision 1.140
1.140 ! kristaps 1: /* $Id: term.c,v 1.139 2010/05/24 21:51:20 schwarze Exp $ */
1.1 kristaps 2: /*
1.75 kristaps 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
1.1 kristaps 4: *
5: * Permission to use, copy, modify, and distribute this software for any
1.74 kristaps 6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 8: *
1.74 kristaps 9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 16: */
1.128 kristaps 17: #ifdef HAVE_CONFIG_H
18: #include "config.h"
19: #endif
20:
1.126 kristaps 21: #include <sys/types.h>
22:
1.1 kristaps 23: #include <assert.h>
1.122 kristaps 24: #include <ctype.h>
1.22 kristaps 25: #include <stdio.h>
1.1 kristaps 26: #include <stdlib.h>
27: #include <string.h>
1.113 kristaps 28: #include <time.h>
1.1 kristaps 29:
1.137 kristaps 30: #include "mandoc.h"
1.101 kristaps 31: #include "chars.h"
1.107 kristaps 32: #include "out.h"
1.71 kristaps 33: #include "term.h"
34: #include "man.h"
35: #include "mdoc.h"
1.105 kristaps 36: #include "main.h"
1.1 kristaps 37:
1.134 joerg 38: static struct termp *term_alloc(enum termenc, size_t);
1.71 kristaps 39: static void term_free(struct termp *);
1.125 kristaps 40: static void spec(struct termp *, const char *, size_t);
41: static void res(struct termp *, const char *, size_t);
42: static void buffera(struct termp *, const char *, size_t);
43: static void bufferc(struct termp *, char);
44: static void adjbuf(struct termp *p, size_t);
45: static void encode(struct termp *, const char *, size_t);
1.1 kristaps 46:
47:
1.71 kristaps 48: void *
1.134 joerg 49: ascii_alloc(size_t width)
1.10 kristaps 50: {
1.1 kristaps 51:
1.134 joerg 52: return(term_alloc(TERMENC_ASCII, width));
1.1 kristaps 53: }
54:
55:
1.99 kristaps 56: void
1.71 kristaps 57: terminal_free(void *arg)
1.11 kristaps 58: {
59:
1.71 kristaps 60: term_free((struct termp *)arg);
1.11 kristaps 61: }
62:
63:
1.71 kristaps 64: static void
65: term_free(struct termp *p)
1.14 kristaps 66: {
67:
1.71 kristaps 68: if (p->buf)
69: free(p->buf);
1.102 kristaps 70: if (p->symtab)
1.101 kristaps 71: chars_free(p->symtab);
1.14 kristaps 72:
1.71 kristaps 73: free(p);
1.14 kristaps 74: }
75:
76:
1.71 kristaps 77: static struct termp *
1.134 joerg 78: term_alloc(enum termenc enc, size_t width)
1.14 kristaps 79: {
1.71 kristaps 80: struct termp *p;
1.14 kristaps 81:
1.117 kristaps 82: p = calloc(1, sizeof(struct termp));
83: if (NULL == p) {
1.120 kristaps 84: perror(NULL);
1.117 kristaps 85: exit(EXIT_FAILURE);
86: }
1.138 schwarze 87: p->tabwidth = 5;
1.71 kristaps 88: p->enc = enc;
1.134 joerg 89: /* Enforce some lower boundary. */
90: if (width < 60)
91: width = 60;
92: p->defrmargin = width - 2;
1.71 kristaps 93: return(p);
1.14 kristaps 94: }
95:
96:
1.71 kristaps 97: /*
98: * Flush a line of text. A "line" is loosely defined as being something
99: * that should be followed by a newline, regardless of whether it's
100: * broken apart by newlines getting there. A line can also be a
1.130 kristaps 101: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
102: * not have a trailing newline.
1.71 kristaps 103: *
1.130 kristaps 104: * The following flags may be specified:
1.71 kristaps 105: *
106: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
107: * offset value. This is useful when doing columnar lists where the
108: * prior column has right-padded.
109: *
110: * - TERMP_NOBREAK: this is the most important and is used when making
111: * columns. In short: don't print a newline and instead pad to the
112: * right margin. Used in conjunction with TERMP_NOLPAD.
113: *
1.91 kristaps 114: * - TERMP_TWOSPACE: when padding, make sure there are at least two
115: * space characters of padding. Otherwise, rather break the line.
116: *
1.84 kristaps 117: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
118: * the line is overrun, and don't pad-right if it's underrun.
119: *
120: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
121: * overruning, instead save the position and continue at that point
122: * when the next invocation.
1.71 kristaps 123: *
124: * In-line line breaking:
125: *
126: * If TERMP_NOBREAK is specified and the line overruns the right
127: * margin, it will break and pad-right to the right margin after
128: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 129: * writing from the right-margin, which will lead to the above scenario
130: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 131: */
132: void
133: term_flushln(struct termp *p)
1.53 kristaps 134: {
1.114 kristaps 135: int i; /* current input position in p->buf */
136: size_t vis; /* current visual position on output */
137: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 138: size_t vend; /* end of word visual position on output */
1.114 kristaps 139: size_t bp; /* visual right border position */
140: int j; /* temporary loop index */
1.140 ! kristaps 141: int jhy; /* last hyphen before line overflow */
1.114 kristaps 142: size_t maxvis, mmax;
1.53 kristaps 143:
1.71 kristaps 144: /*
145: * First, establish the maximum columns of "visible" content.
146: * This is usually the difference between the right-margin and
147: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 148: * small set of values.
1.71 kristaps 149: */
1.53 kristaps 150:
1.71 kristaps 151: assert(p->offset < p->rmargin);
1.92 kristaps 152:
1.129 kristaps 153: maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119 kristaps 154: /* LINTED */
1.129 kristaps 155: 0 : p->rmargin - p->offset - p->overstep;
156: mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119 kristaps 157: /* LINTED */
1.129 kristaps 158: 0 : p->maxrmargin - p->offset - p->overstep;
1.92 kristaps 159:
1.71 kristaps 160: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 161:
1.136 schwarze 162: /*
163: * Indent the first line of a paragraph.
164: */
165: vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
166:
1.115 kristaps 167: /*
168: * FIXME: if bp is zero, we still output the first word before
169: * breaking the line.
170: */
171:
1.136 schwarze 172: vis = vend = i = 0;
173: while (i < (int)p->col) {
1.71 kristaps 174:
175: /*
1.138 schwarze 176: * Handle literal tab characters.
177: */
178: for (j = i; j < (int)p->col; j++) {
179: if ('\t' != p->buf[j])
180: break;
181: vend = (vis/p->tabwidth+1)*p->tabwidth;
182: vbl += vend - vis;
183: vis = vend;
184: }
185:
186: /*
1.71 kristaps 187: * Count up visible word characters. Control sequences
188: * (starting with the CSI) aren't counted. A space
189: * generates a non-printing word, which is valid (the
190: * space is printed according to regular spacing rules).
191: */
192:
193: /* LINTED */
1.140 ! kristaps 194: for (jhy = 0; j < (int)p->col; j++) {
1.138 schwarze 195: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 196: break;
1.140 ! kristaps 197: if (8 != p->buf[j]) {
! 198: if (vend > vis && vend < bp &&
! 199: ASCII_HYPH == p->buf[j])
! 200: jhy = j;
! 201: vend++;
! 202: } else
1.136 schwarze 203: vend--;
1.71 kristaps 204: }
1.53 kristaps 205:
1.71 kristaps 206: /*
1.81 kristaps 207: * Find out whether we would exceed the right margin.
1.136 schwarze 208: * If so, break to the next line.
1.81 kristaps 209: */
1.140 ! kristaps 210: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 211: vend -= vis;
1.81 kristaps 212: putchar('\n');
213: if (TERMP_NOBREAK & p->flags) {
1.139 schwarze 214: p->viscol = p->rmargin;
1.81 kristaps 215: for (j = 0; j < (int)p->rmargin; j++)
216: putchar(' ');
1.136 schwarze 217: vend += p->rmargin - p->offset;
1.81 kristaps 218: } else {
1.139 schwarze 219: p->viscol = 0;
1.136 schwarze 220: vbl = p->offset;
1.81 kristaps 221: }
1.130 kristaps 222:
1.129 kristaps 223: /* Remove the p->overstep width. */
1.130 kristaps 224:
1.112 kristaps 225: bp += (int)/* LINTED */
1.129 kristaps 226: p->overstep;
227: p->overstep = 0;
1.71 kristaps 228: }
1.53 kristaps 229:
1.138 schwarze 230: /*
231: * Skip leading tabs, they were handled above.
232: */
233: while (i < (int)p->col && '\t' == p->buf[i])
234: i++;
235:
1.130 kristaps 236: /* Write out the [remaining] word. */
1.136 schwarze 237: for ( ; i < (int)p->col; i++) {
1.140 ! kristaps 238: if (vend > bp && jhy > 0 && i > jhy)
! 239: break;
1.138 schwarze 240: if ('\t' == p->buf[i])
241: break;
1.136 schwarze 242: if (' ' == p->buf[i]) {
243: while (' ' == p->buf[i]) {
244: vbl++;
245: i++;
246: }
1.71 kristaps 247: break;
1.136 schwarze 248: }
249: if (ASCII_NBRSP == p->buf[i]) {
250: vbl++;
251: continue;
252: }
1.130 kristaps 253:
1.136 schwarze 254: /*
255: * Now we definitely know there will be
256: * printable characters to output,
257: * so write preceding white space now.
258: */
259: if (vbl) {
260: for (j = 0; j < (int)vbl; j++)
261: putchar(' ');
1.139 schwarze 262: p->viscol += vbl;
1.136 schwarze 263: vbl = 0;
264: }
1.140 ! kristaps 265:
! 266: if (ASCII_HYPH == p->buf[i])
! 267: putchar('-');
! 268: else
! 269: putchar(p->buf[i]);
! 270:
1.139 schwarze 271: p->viscol += 1;
1.136 schwarze 272: }
273: vend += vbl;
274: vis = vend;
1.71 kristaps 275: }
1.111 kristaps 276:
1.91 kristaps 277: p->col = 0;
1.129 kristaps 278: p->overstep = 0;
1.15 kristaps 279:
1.91 kristaps 280: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 281: p->viscol = 0;
1.91 kristaps 282: putchar('\n');
1.15 kristaps 283: return;
1.71 kristaps 284: }
1.15 kristaps 285:
1.91 kristaps 286: if (TERMP_HANG & p->flags) {
287: /* We need one blank after the tag. */
1.129 kristaps 288: p->overstep = /* LINTED */
1.92 kristaps 289: vis - maxvis + 1;
1.91 kristaps 290:
291: /*
292: * Behave exactly the same way as groff:
1.92 kristaps 293: * If we have overstepped the margin, temporarily move
294: * it to the right and flag the rest of the line to be
295: * shorter.
1.91 kristaps 296: * If we landed right at the margin, be happy.
1.92 kristaps 297: * If we are one step before the margin, temporarily
298: * move it one step LEFT and flag the rest of the line
299: * to be longer.
1.91 kristaps 300: */
1.129 kristaps 301: if (p->overstep >= -1) {
302: assert((int)maxvis + p->overstep >= 0);
1.92 kristaps 303: /* LINTED */
1.129 kristaps 304: maxvis += p->overstep;
1.92 kristaps 305: } else
1.129 kristaps 306: p->overstep = 0;
1.91 kristaps 307:
308: } else if (TERMP_DANGLE & p->flags)
309: return;
1.15 kristaps 310:
1.92 kristaps 311: /* Right-pad. */
312: if (maxvis > vis + /* LINTED */
1.139 schwarze 313: ((TERMP_TWOSPACE & p->flags) ? 1 : 0)) {
314: p->viscol += maxvis - vis;
1.91 kristaps 315: for ( ; vis < maxvis; vis++)
316: putchar(' ');
1.139 schwarze 317: } else { /* ...or newline break. */
1.71 kristaps 318: putchar('\n');
1.139 schwarze 319: p->viscol = p->rmargin;
1.91 kristaps 320: for (i = 0; i < (int)p->rmargin; i++)
321: putchar(' ');
322: }
1.15 kristaps 323: }
324:
325:
1.71 kristaps 326: /*
327: * A newline only breaks an existing line; it won't assert vertical
328: * space. All data in the output buffer is flushed prior to the newline
329: * assertion.
330: */
331: void
332: term_newln(struct termp *p)
1.15 kristaps 333: {
334:
1.71 kristaps 335: p->flags |= TERMP_NOSPACE;
1.139 schwarze 336: if (0 == p->col && 0 == p->viscol) {
1.71 kristaps 337: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 338: return;
1.16 kristaps 339: }
1.71 kristaps 340: term_flushln(p);
341: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 342: }
343:
344:
1.71 kristaps 345: /*
346: * Asserts a vertical space (a full, empty line-break between lines).
347: * Note that if used twice, this will cause two blank spaces and so on.
348: * All data in the output buffer is flushed prior to the newline
349: * assertion.
350: */
351: void
352: term_vspace(struct termp *p)
1.16 kristaps 353: {
354:
1.62 kristaps 355: term_newln(p);
1.139 schwarze 356: p->viscol = 0;
1.71 kristaps 357: putchar('\n');
1.16 kristaps 358: }
359:
360:
1.71 kristaps 361: static void
1.125 kristaps 362: spec(struct termp *p, const char *word, size_t len)
1.17 kristaps 363: {
1.71 kristaps 364: const char *rhs;
365: size_t sz;
1.17 kristaps 366:
1.101 kristaps 367: rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125 kristaps 368: if (rhs)
369: encode(p, rhs, sz);
1.94 kristaps 370: }
371:
372:
373: static void
1.125 kristaps 374: res(struct termp *p, const char *word, size_t len)
1.94 kristaps 375: {
376: const char *rhs;
377: size_t sz;
378:
1.101 kristaps 379: rhs = chars_a2res(p->symtab, word, len, &sz);
1.125 kristaps 380: if (rhs)
381: encode(p, rhs, sz);
382: }
383:
384:
385: void
386: term_fontlast(struct termp *p)
387: {
388: enum termfont f;
389:
390: f = p->fontl;
391: p->fontl = p->fontq[p->fonti];
392: p->fontq[p->fonti] = f;
393: }
394:
395:
396: void
397: term_fontrepl(struct termp *p, enum termfont f)
398: {
399:
400: p->fontl = p->fontq[p->fonti];
401: p->fontq[p->fonti] = f;
402: }
403:
404:
405: void
406: term_fontpush(struct termp *p, enum termfont f)
407: {
408:
409: assert(p->fonti + 1 < 10);
410: p->fontl = p->fontq[p->fonti];
411: p->fontq[++p->fonti] = f;
412: }
413:
414:
415: const void *
416: term_fontq(struct termp *p)
417: {
418:
419: return(&p->fontq[p->fonti]);
420: }
421:
422:
423: enum termfont
424: term_fonttop(struct termp *p)
425: {
426:
427: return(p->fontq[p->fonti]);
428: }
429:
430:
431: void
432: term_fontpopq(struct termp *p, const void *key)
433: {
434:
435: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
436: p->fonti--;
437: assert(p->fonti >= 0);
438: }
1.94 kristaps 439:
1.125 kristaps 440:
441: void
442: term_fontpop(struct termp *p)
443: {
444:
445: assert(p->fonti);
446: p->fonti--;
1.17 kristaps 447: }
448:
449:
1.71 kristaps 450: /*
451: * Handle pwords, partial words, which may be either a single word or a
452: * phrase that cannot be broken down (such as a literal string). This
453: * handles word styling.
454: */
1.86 kristaps 455: void
456: term_word(struct termp *p, const char *word)
1.65 kristaps 457: {
1.124 kristaps 458: const char *sv, *seq;
1.125 kristaps 459: int sz;
1.124 kristaps 460: size_t ssz;
461: enum roffdeco deco;
1.71 kristaps 462:
1.100 kristaps 463: sv = word;
464:
1.123 kristaps 465: if (word[0] && '\0' == word[1])
1.100 kristaps 466: switch (word[0]) {
467: case('.'):
468: /* FALLTHROUGH */
469: case(','):
470: /* FALLTHROUGH */
471: case(';'):
472: /* FALLTHROUGH */
473: case(':'):
474: /* FALLTHROUGH */
475: case('?'):
476: /* FALLTHROUGH */
477: case('!'):
478: /* FALLTHROUGH */
479: case(')'):
480: /* FALLTHROUGH */
481: case(']'):
482: if ( ! (TERMP_IGNDELIM & p->flags))
483: p->flags |= TERMP_NOSPACE;
484: break;
485: default:
486: break;
487: }
1.65 kristaps 488:
1.133 kristaps 489: if ( ! (TERMP_NOSPACE & p->flags)) {
1.125 kristaps 490: bufferc(p, ' ');
1.133 kristaps 491: if (TERMP_SENTENCE & p->flags)
492: bufferc(p, ' ');
493: }
1.65 kristaps 494:
1.71 kristaps 495: if ( ! (p->flags & TERMP_NONOSPACE))
496: p->flags &= ~TERMP_NOSPACE;
1.133 kristaps 497:
498: p->flags &= ~TERMP_SENTENCE;
1.65 kristaps 499:
1.125 kristaps 500: /* FIXME: use strcspn. */
1.124 kristaps 501:
502: while (*word) {
503: if ('\\' != *word) {
1.125 kristaps 504: encode(p, word, 1);
1.124 kristaps 505: word++;
506: continue;
507: }
508:
509: seq = ++word;
510: sz = a2roffdeco(&deco, &seq, &ssz);
511:
512: switch (deco) {
513: case (DECO_RESERVED):
1.125 kristaps 514: res(p, seq, ssz);
1.124 kristaps 515: break;
516: case (DECO_SPECIAL):
1.125 kristaps 517: spec(p, seq, ssz);
1.124 kristaps 518: break;
519: case (DECO_BOLD):
1.125 kristaps 520: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 521: break;
522: case (DECO_ITALIC):
1.125 kristaps 523: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 524: break;
525: case (DECO_ROMAN):
1.125 kristaps 526: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 527: break;
528: case (DECO_PREVIOUS):
1.125 kristaps 529: term_fontlast(p);
1.124 kristaps 530: break;
531: default:
532: break;
533: }
1.127 kristaps 534:
1.124 kristaps 535: word += sz;
1.127 kristaps 536: if (DECO_NOSPACE == deco && '\0' == *word)
537: p->flags |= TERMP_NOSPACE;
1.124 kristaps 538: }
1.65 kristaps 539:
1.131 kristaps 540: /*
541: * Note that we don't process the pipe: the parser sees it as
542: * punctuation, but we don't in terms of typography.
543: */
1.100 kristaps 544: if (sv[0] && 0 == sv[1])
545: switch (sv[0]) {
546: case('('):
547: /* FALLTHROUGH */
548: case('['):
549: p->flags |= TERMP_NOSPACE;
550: break;
551: default:
552: break;
553: }
1.65 kristaps 554: }
555:
556:
1.71 kristaps 557: static void
1.125 kristaps 558: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 559: {
560:
1.125 kristaps 561: if (0 == p->maxcols)
562: p->maxcols = 1024;
563: while (sz >= p->maxcols)
564: p->maxcols <<= 2;
565:
566: p->buf = realloc(p->buf, p->maxcols);
567: if (NULL == p->buf) {
568: perror(NULL);
569: exit(EXIT_FAILURE);
1.71 kristaps 570: }
1.51 kristaps 571: }
572:
1.79 kristaps 573:
574: static void
1.125 kristaps 575: buffera(struct termp *p, const char *word, size_t sz)
1.79 kristaps 576: {
1.125 kristaps 577:
578: if (p->col + sz >= p->maxcols)
579: adjbuf(p, p->col + sz);
580:
1.126 kristaps 581: memcpy(&p->buf[(int)p->col], word, sz);
1.125 kristaps 582: p->col += sz;
583: }
584:
585:
586: static void
587: bufferc(struct termp *p, char c)
588: {
589:
590: if (p->col + 1 >= p->maxcols)
591: adjbuf(p, p->col + 1);
592:
1.126 kristaps 593: p->buf[(int)p->col++] = c;
1.125 kristaps 594: }
595:
596:
597: static void
598: encode(struct termp *p, const char *word, size_t sz)
599: {
600: enum termfont f;
601: int i;
602:
603: /*
604: * Encode and buffer a string of characters. If the current
605: * font mode is unset, buffer directly, else encode then buffer
606: * character by character.
607: */
608:
609: if (TERMFONT_NONE == (f = term_fonttop(p))) {
610: buffera(p, word, sz);
611: return;
612: }
613:
614: for (i = 0; i < (int)sz; i++) {
615: if ( ! isgraph((u_char)word[i])) {
616: bufferc(p, word[i]);
617: continue;
1.79 kristaps 618: }
1.125 kristaps 619:
620: if (TERMFONT_UNDER == f)
621: bufferc(p, '_');
622: else
623: bufferc(p, word[i]);
624:
625: bufferc(p, 8);
626: bufferc(p, word[i]);
1.79 kristaps 627: }
628: }
1.106 kristaps 629:
630:
1.107 kristaps 631: size_t
632: term_vspan(const struct roffsu *su)
1.106 kristaps 633: {
634: double r;
635:
1.107 kristaps 636: switch (su->unit) {
1.106 kristaps 637: case (SCALE_CM):
1.107 kristaps 638: r = su->scale * 2;
1.106 kristaps 639: break;
640: case (SCALE_IN):
1.107 kristaps 641: r = su->scale * 6;
1.106 kristaps 642: break;
643: case (SCALE_PC):
1.107 kristaps 644: r = su->scale;
1.106 kristaps 645: break;
646: case (SCALE_PT):
1.107 kristaps 647: r = su->scale / 8;
1.106 kristaps 648: break;
649: case (SCALE_MM):
1.107 kristaps 650: r = su->scale / 1000;
1.106 kristaps 651: break;
652: case (SCALE_VS):
1.107 kristaps 653: r = su->scale;
1.106 kristaps 654: break;
655: default:
1.107 kristaps 656: r = su->scale - 1;
1.106 kristaps 657: break;
658: }
659:
660: if (r < 0.0)
661: r = 0.0;
1.107 kristaps 662: return(/* LINTED */(size_t)
1.106 kristaps 663: r);
664: }
665:
666:
1.107 kristaps 667: size_t
668: term_hspan(const struct roffsu *su)
1.106 kristaps 669: {
670: double r;
671:
1.108 kristaps 672: /* XXX: CM, IN, and PT are approximations. */
673:
1.107 kristaps 674: switch (su->unit) {
1.106 kristaps 675: case (SCALE_CM):
1.108 kristaps 676: r = 4 * su->scale;
1.106 kristaps 677: break;
678: case (SCALE_IN):
1.108 kristaps 679: /* XXX: this is an approximation. */
680: r = 10 * su->scale;
1.106 kristaps 681: break;
682: case (SCALE_PC):
1.108 kristaps 683: r = (10 * su->scale) / 6;
1.106 kristaps 684: break;
685: case (SCALE_PT):
1.108 kristaps 686: r = (10 * su->scale) / 72;
1.106 kristaps 687: break;
688: case (SCALE_MM):
1.107 kristaps 689: r = su->scale / 1000; /* FIXME: double-check. */
1.106 kristaps 690: break;
691: case (SCALE_VS):
1.107 kristaps 692: r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106 kristaps 693: break;
694: default:
1.107 kristaps 695: r = su->scale;
1.106 kristaps 696: break;
697: }
698:
699: if (r < 0.0)
700: r = 0.0;
1.107 kristaps 701: return((size_t)/* LINTED */
1.106 kristaps 702: r);
703: }
704:
705:
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