Annotation of mandoc/term.c, Revision 1.159
1.159 ! schwarze 1: /* $Id: term.c,v 1.158 2010/07/03 16:02:12 schwarze Exp $ */
1.1 kristaps 2: /*
1.159 ! schwarze 3: * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
! 4: * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.74 kristaps 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.74 kristaps 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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.
1.1 kristaps 17: */
1.128 kristaps 18: #ifdef HAVE_CONFIG_H
19: #include "config.h"
20: #endif
21:
1.126 kristaps 22: #include <sys/types.h>
23:
1.1 kristaps 24: #include <assert.h>
1.122 kristaps 25: #include <ctype.h>
1.141 kristaps 26: #include <stdint.h>
1.22 kristaps 27: #include <stdio.h>
1.1 kristaps 28: #include <stdlib.h>
29: #include <string.h>
30:
1.137 kristaps 31: #include "mandoc.h"
1.101 kristaps 32: #include "chars.h"
1.107 kristaps 33: #include "out.h"
1.158 schwarze 34: #include "regs.h"
1.71 kristaps 35: #include "term.h"
1.105 kristaps 36: #include "main.h"
1.1 kristaps 37:
1.125 kristaps 38: static void spec(struct termp *, const char *, size_t);
39: static void res(struct termp *, const char *, size_t);
40: static void buffera(struct termp *, const char *, size_t);
41: static void bufferc(struct termp *, char);
42: static void adjbuf(struct termp *p, size_t);
43: static void encode(struct termp *, const char *, size_t);
1.11 kristaps 44:
45:
1.145 kristaps 46: void
1.71 kristaps 47: term_free(struct termp *p)
1.14 kristaps 48: {
49:
1.71 kristaps 50: if (p->buf)
51: free(p->buf);
1.102 kristaps 52: if (p->symtab)
1.101 kristaps 53: chars_free(p->symtab);
1.145 kristaps 54:
1.142 kristaps 55: free(p);
56: }
57:
58:
59: void
60: term_begin(struct termp *p, term_margin head,
61: term_margin foot, const void *arg)
62: {
63:
64: p->headf = head;
65: p->footf = foot;
66: p->argf = arg;
1.146 kristaps 67: (*p->begin)(p);
1.142 kristaps 68: }
69:
70:
71: void
72: term_end(struct termp *p)
73: {
74:
1.146 kristaps 75: (*p->end)(p);
1.14 kristaps 76: }
77:
78:
1.145 kristaps 79: struct termp *
80: term_alloc(enum termenc enc)
1.14 kristaps 81: {
1.141 kristaps 82: struct termp *p;
1.14 kristaps 83:
1.117 kristaps 84: p = calloc(1, sizeof(struct termp));
85: if (NULL == p) {
1.120 kristaps 86: perror(NULL);
1.117 kristaps 87: exit(EXIT_FAILURE);
88: }
1.141 kristaps 89:
1.71 kristaps 90: p->enc = enc;
91: return(p);
1.14 kristaps 92: }
93:
94:
1.71 kristaps 95: /*
96: * Flush a line of text. A "line" is loosely defined as being something
97: * that should be followed by a newline, regardless of whether it's
98: * broken apart by newlines getting there. A line can also be a
1.130 kristaps 99: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
100: * not have a trailing newline.
1.71 kristaps 101: *
1.130 kristaps 102: * The following flags may be specified:
1.71 kristaps 103: *
104: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
105: * offset value. This is useful when doing columnar lists where the
106: * prior column has right-padded.
107: *
108: * - TERMP_NOBREAK: this is the most important and is used when making
109: * columns. In short: don't print a newline and instead pad to the
110: * right margin. Used in conjunction with TERMP_NOLPAD.
111: *
1.91 kristaps 112: * - TERMP_TWOSPACE: when padding, make sure there are at least two
113: * space characters of padding. Otherwise, rather break the line.
114: *
1.84 kristaps 115: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
116: * the line is overrun, and don't pad-right if it's underrun.
117: *
118: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
119: * overruning, instead save the position and continue at that point
120: * when the next invocation.
1.71 kristaps 121: *
122: * In-line line breaking:
123: *
124: * If TERMP_NOBREAK is specified and the line overruns the right
125: * margin, it will break and pad-right to the right margin after
126: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 127: * writing from the right-margin, which will lead to the above scenario
128: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 129: */
130: void
131: term_flushln(struct termp *p)
1.53 kristaps 132: {
1.114 kristaps 133: int i; /* current input position in p->buf */
134: size_t vis; /* current visual position on output */
135: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 136: size_t vend; /* end of word visual position on output */
1.114 kristaps 137: size_t bp; /* visual right border position */
1.152 kristaps 138: int j; /* temporary loop index for p->buf */
139: int jhy; /* last hyph before overflow w/r/t j */
140: size_t maxvis; /* output position of visible boundary */
141: size_t mmax; /* used in calculating bp */
1.53 kristaps 142:
1.71 kristaps 143: /*
144: * First, establish the maximum columns of "visible" content.
145: * This is usually the difference between the right-margin and
146: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 147: * small set of values.
1.71 kristaps 148: */
1.53 kristaps 149:
1.71 kristaps 150: assert(p->offset < p->rmargin);
1.92 kristaps 151:
1.129 kristaps 152: maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119 kristaps 153: /* LINTED */
1.129 kristaps 154: 0 : p->rmargin - p->offset - p->overstep;
155: mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119 kristaps 156: /* LINTED */
1.129 kristaps 157: 0 : p->maxrmargin - p->offset - p->overstep;
1.92 kristaps 158:
1.71 kristaps 159: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 160:
1.136 schwarze 161: /*
162: * Indent the first line of a paragraph.
163: */
164: vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
165:
1.154 kristaps 166: vis = vend = i = 0;
1.115 kristaps 167:
1.136 schwarze 168: while (i < (int)p->col) {
1.71 kristaps 169: /*
1.154 kristaps 170: * Handle literal tab characters: collapse all
171: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 172: */
173: for (j = i; j < (int)p->col; j++) {
174: if ('\t' != p->buf[j])
175: break;
1.154 kristaps 176: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 177: vbl += vend - vis;
178: vis = vend;
179: }
180:
181: /*
1.71 kristaps 182: * Count up visible word characters. Control sequences
183: * (starting with the CSI) aren't counted. A space
184: * generates a non-printing word, which is valid (the
185: * space is printed according to regular spacing rules).
186: */
187:
188: /* LINTED */
1.140 kristaps 189: for (jhy = 0; j < (int)p->col; j++) {
1.138 schwarze 190: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 191: break;
1.154 kristaps 192:
193: /* Back over the the last printed character. */
194: if (8 == p->buf[j]) {
1.153 kristaps 195: assert(j);
196: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 197: continue;
1.153 kristaps 198: }
1.154 kristaps 199:
200: /* Regular word. */
201: /* Break at the hyphen point if we overrun. */
202: if (vend > vis && vend < bp &&
203: ASCII_HYPH == p->buf[j])
204: jhy = j;
205:
206: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 207: }
1.53 kristaps 208:
1.71 kristaps 209: /*
1.81 kristaps 210: * Find out whether we would exceed the right margin.
1.136 schwarze 211: * If so, break to the next line.
1.81 kristaps 212: */
1.140 kristaps 213: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 214: vend -= vis;
1.146 kristaps 215: (*p->endline)(p);
1.81 kristaps 216: if (TERMP_NOBREAK & p->flags) {
1.139 schwarze 217: p->viscol = p->rmargin;
1.146 kristaps 218: (*p->advance)(p, p->rmargin);
1.136 schwarze 219: vend += p->rmargin - p->offset;
1.81 kristaps 220: } else {
1.139 schwarze 221: p->viscol = 0;
1.136 schwarze 222: vbl = p->offset;
1.81 kristaps 223: }
1.130 kristaps 224:
1.129 kristaps 225: /* Remove the p->overstep width. */
1.130 kristaps 226:
1.112 kristaps 227: bp += (int)/* LINTED */
1.129 kristaps 228: p->overstep;
229: p->overstep = 0;
1.71 kristaps 230: }
1.53 kristaps 231:
1.138 schwarze 232: /*
233: * Skip leading tabs, they were handled above.
234: */
235: while (i < (int)p->col && '\t' == p->buf[i])
236: i++;
237:
1.130 kristaps 238: /* Write out the [remaining] word. */
1.136 schwarze 239: for ( ; i < (int)p->col; i++) {
1.140 kristaps 240: if (vend > bp && jhy > 0 && i > jhy)
241: break;
1.138 schwarze 242: if ('\t' == p->buf[i])
243: break;
1.136 schwarze 244: if (' ' == p->buf[i]) {
245: while (' ' == p->buf[i]) {
1.153 kristaps 246: vbl += (*p->width)(p, p->buf[i]);
1.136 schwarze 247: i++;
248: }
1.71 kristaps 249: break;
1.136 schwarze 250: }
251: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 252: vbl += (*p->width)(p, ' ');
1.136 schwarze 253: continue;
254: }
1.130 kristaps 255:
1.136 schwarze 256: /*
257: * Now we definitely know there will be
258: * printable characters to output,
259: * so write preceding white space now.
260: */
261: if (vbl) {
1.146 kristaps 262: (*p->advance)(p, vbl);
1.139 schwarze 263: p->viscol += vbl;
1.136 schwarze 264: vbl = 0;
265: }
1.140 kristaps 266:
1.153 kristaps 267: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 268: (*p->letter)(p, '-');
1.153 kristaps 269: p->viscol += (*p->width)(p, '-');
270: } else {
1.146 kristaps 271: (*p->letter)(p, p->buf[i]);
1.153 kristaps 272: p->viscol += (*p->width)(p, p->buf[i]);
273: }
1.136 schwarze 274: }
275: vend += vbl;
276: vis = vend;
1.71 kristaps 277: }
1.111 kristaps 278:
1.91 kristaps 279: p->col = 0;
1.129 kristaps 280: p->overstep = 0;
1.15 kristaps 281:
1.91 kristaps 282: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 283: p->viscol = 0;
1.146 kristaps 284: (*p->endline)(p);
1.15 kristaps 285: return;
1.71 kristaps 286: }
1.15 kristaps 287:
1.91 kristaps 288: if (TERMP_HANG & p->flags) {
289: /* We need one blank after the tag. */
1.129 kristaps 290: p->overstep = /* LINTED */
1.153 kristaps 291: vis - maxvis + (*p->width)(p, ' ');
1.91 kristaps 292:
293: /*
294: * Behave exactly the same way as groff:
1.92 kristaps 295: * If we have overstepped the margin, temporarily move
296: * it to the right and flag the rest of the line to be
297: * shorter.
1.91 kristaps 298: * If we landed right at the margin, be happy.
1.92 kristaps 299: * If we are one step before the margin, temporarily
300: * move it one step LEFT and flag the rest of the line
301: * to be longer.
1.91 kristaps 302: */
1.129 kristaps 303: if (p->overstep >= -1) {
304: assert((int)maxvis + p->overstep >= 0);
1.92 kristaps 305: /* LINTED */
1.129 kristaps 306: maxvis += p->overstep;
1.92 kristaps 307: } else
1.129 kristaps 308: p->overstep = 0;
1.91 kristaps 309:
310: } else if (TERMP_DANGLE & p->flags)
311: return;
1.15 kristaps 312:
1.92 kristaps 313: /* Right-pad. */
314: if (maxvis > vis + /* LINTED */
1.154 kristaps 315: ((TERMP_TWOSPACE & p->flags) ?
316: (*p->width)(p, ' ') : 0)) {
1.139 schwarze 317: p->viscol += maxvis - vis;
1.146 kristaps 318: (*p->advance)(p, maxvis - vis);
1.142 kristaps 319: vis += (maxvis - vis);
1.139 schwarze 320: } else { /* ...or newline break. */
1.146 kristaps 321: (*p->endline)(p);
1.139 schwarze 322: p->viscol = p->rmargin;
1.146 kristaps 323: (*p->advance)(p, p->rmargin);
1.91 kristaps 324: }
1.15 kristaps 325: }
326:
327:
1.71 kristaps 328: /*
329: * A newline only breaks an existing line; it won't assert vertical
330: * space. All data in the output buffer is flushed prior to the newline
331: * assertion.
332: */
333: void
334: term_newln(struct termp *p)
1.15 kristaps 335: {
336:
1.71 kristaps 337: p->flags |= TERMP_NOSPACE;
1.139 schwarze 338: if (0 == p->col && 0 == p->viscol) {
1.71 kristaps 339: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 340: return;
1.16 kristaps 341: }
1.71 kristaps 342: term_flushln(p);
343: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 344: }
345:
346:
1.71 kristaps 347: /*
348: * Asserts a vertical space (a full, empty line-break between lines).
349: * Note that if used twice, this will cause two blank spaces and so on.
350: * All data in the output buffer is flushed prior to the newline
351: * assertion.
352: */
353: void
354: term_vspace(struct termp *p)
1.16 kristaps 355: {
356:
1.62 kristaps 357: term_newln(p);
1.139 schwarze 358: p->viscol = 0;
1.146 kristaps 359: (*p->endline)(p);
1.16 kristaps 360: }
361:
362:
1.71 kristaps 363: static void
1.125 kristaps 364: spec(struct termp *p, const char *word, size_t len)
1.17 kristaps 365: {
1.71 kristaps 366: const char *rhs;
367: size_t sz;
1.17 kristaps 368:
1.101 kristaps 369: rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125 kristaps 370: if (rhs)
371: encode(p, rhs, sz);
1.94 kristaps 372: }
373:
374:
375: static void
1.125 kristaps 376: res(struct termp *p, const char *word, size_t len)
1.94 kristaps 377: {
378: const char *rhs;
379: size_t sz;
380:
1.101 kristaps 381: rhs = chars_a2res(p->symtab, word, len, &sz);
1.158 schwarze 382: if (NULL == rhs) {
383: rhs = roff_getstrn(word, len);
384: if (rhs)
385: sz = strlen(rhs);
386: }
1.125 kristaps 387: if (rhs)
388: encode(p, rhs, sz);
389: }
390:
391:
392: void
393: term_fontlast(struct termp *p)
394: {
395: enum termfont f;
396:
397: f = p->fontl;
398: p->fontl = p->fontq[p->fonti];
399: p->fontq[p->fonti] = f;
400: }
401:
402:
403: void
404: term_fontrepl(struct termp *p, enum termfont f)
405: {
406:
407: p->fontl = p->fontq[p->fonti];
408: p->fontq[p->fonti] = f;
409: }
410:
411:
412: void
413: term_fontpush(struct termp *p, enum termfont f)
414: {
415:
416: assert(p->fonti + 1 < 10);
417: p->fontl = p->fontq[p->fonti];
418: p->fontq[++p->fonti] = f;
419: }
420:
421:
422: const void *
423: term_fontq(struct termp *p)
424: {
425:
426: return(&p->fontq[p->fonti]);
427: }
428:
429:
430: enum termfont
431: term_fonttop(struct termp *p)
432: {
433:
434: return(p->fontq[p->fonti]);
435: }
436:
437:
438: void
439: term_fontpopq(struct termp *p, const void *key)
440: {
441:
442: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
443: p->fonti--;
444: assert(p->fonti >= 0);
445: }
1.94 kristaps 446:
1.125 kristaps 447:
448: void
449: term_fontpop(struct termp *p)
450: {
451:
452: assert(p->fonti);
453: p->fonti--;
1.17 kristaps 454: }
455:
456:
1.71 kristaps 457: /*
458: * Handle pwords, partial words, which may be either a single word or a
459: * phrase that cannot be broken down (such as a literal string). This
460: * handles word styling.
461: */
1.86 kristaps 462: void
463: term_word(struct termp *p, const char *word)
1.65 kristaps 464: {
1.124 kristaps 465: const char *sv, *seq;
1.125 kristaps 466: int sz;
1.124 kristaps 467: size_t ssz;
468: enum roffdeco deco;
1.71 kristaps 469:
1.100 kristaps 470: sv = word;
471:
1.123 kristaps 472: if (word[0] && '\0' == word[1])
1.100 kristaps 473: switch (word[0]) {
474: case('.'):
475: /* FALLTHROUGH */
476: case(','):
477: /* FALLTHROUGH */
478: case(';'):
479: /* FALLTHROUGH */
480: case(':'):
481: /* FALLTHROUGH */
482: case('?'):
483: /* FALLTHROUGH */
484: case('!'):
485: /* FALLTHROUGH */
486: case(')'):
487: /* FALLTHROUGH */
488: case(']'):
489: if ( ! (TERMP_IGNDELIM & p->flags))
490: p->flags |= TERMP_NOSPACE;
491: break;
492: default:
493: break;
494: }
1.65 kristaps 495:
1.133 kristaps 496: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 497: if ( ! (TERMP_KEEP & p->flags)) {
498: if (TERMP_PREKEEP & p->flags)
499: p->flags |= TERMP_KEEP;
1.133 kristaps 500: bufferc(p, ' ');
1.151 schwarze 501: if (TERMP_SENTENCE & p->flags)
502: bufferc(p, ' ');
503: } else
504: bufferc(p, ASCII_NBRSP);
1.133 kristaps 505: }
1.65 kristaps 506:
1.71 kristaps 507: if ( ! (p->flags & TERMP_NONOSPACE))
508: p->flags &= ~TERMP_NOSPACE;
1.133 kristaps 509:
510: p->flags &= ~TERMP_SENTENCE;
1.65 kristaps 511:
1.125 kristaps 512: /* FIXME: use strcspn. */
1.124 kristaps 513:
514: while (*word) {
515: if ('\\' != *word) {
1.125 kristaps 516: encode(p, word, 1);
1.124 kristaps 517: word++;
518: continue;
519: }
520:
521: seq = ++word;
522: sz = a2roffdeco(&deco, &seq, &ssz);
523:
524: switch (deco) {
525: case (DECO_RESERVED):
1.125 kristaps 526: res(p, seq, ssz);
1.124 kristaps 527: break;
528: case (DECO_SPECIAL):
1.125 kristaps 529: spec(p, seq, ssz);
1.124 kristaps 530: break;
531: case (DECO_BOLD):
1.125 kristaps 532: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 533: break;
534: case (DECO_ITALIC):
1.125 kristaps 535: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 536: break;
537: case (DECO_ROMAN):
1.125 kristaps 538: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 539: break;
540: case (DECO_PREVIOUS):
1.125 kristaps 541: term_fontlast(p);
1.124 kristaps 542: break;
543: default:
544: break;
545: }
1.127 kristaps 546:
1.124 kristaps 547: word += sz;
1.127 kristaps 548: if (DECO_NOSPACE == deco && '\0' == *word)
549: p->flags |= TERMP_NOSPACE;
1.124 kristaps 550: }
1.65 kristaps 551:
1.131 kristaps 552: /*
553: * Note that we don't process the pipe: the parser sees it as
554: * punctuation, but we don't in terms of typography.
555: */
1.100 kristaps 556: if (sv[0] && 0 == sv[1])
557: switch (sv[0]) {
558: case('('):
559: /* FALLTHROUGH */
560: case('['):
561: p->flags |= TERMP_NOSPACE;
562: break;
563: default:
564: break;
565: }
1.65 kristaps 566: }
567:
568:
1.71 kristaps 569: static void
1.125 kristaps 570: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 571: {
572:
1.125 kristaps 573: if (0 == p->maxcols)
574: p->maxcols = 1024;
575: while (sz >= p->maxcols)
576: p->maxcols <<= 2;
577:
578: p->buf = realloc(p->buf, p->maxcols);
579: if (NULL == p->buf) {
580: perror(NULL);
581: exit(EXIT_FAILURE);
1.71 kristaps 582: }
1.51 kristaps 583: }
584:
1.79 kristaps 585:
586: static void
1.125 kristaps 587: buffera(struct termp *p, const char *word, size_t sz)
1.79 kristaps 588: {
1.125 kristaps 589:
590: if (p->col + sz >= p->maxcols)
591: adjbuf(p, p->col + sz);
592:
1.126 kristaps 593: memcpy(&p->buf[(int)p->col], word, sz);
1.125 kristaps 594: p->col += sz;
595: }
596:
597:
598: static void
599: bufferc(struct termp *p, char c)
600: {
601:
602: if (p->col + 1 >= p->maxcols)
603: adjbuf(p, p->col + 1);
604:
1.126 kristaps 605: p->buf[(int)p->col++] = c;
1.125 kristaps 606: }
607:
608:
609: static void
610: encode(struct termp *p, const char *word, size_t sz)
611: {
612: enum termfont f;
613: int i;
614:
615: /*
616: * Encode and buffer a string of characters. If the current
617: * font mode is unset, buffer directly, else encode then buffer
618: * character by character.
619: */
620:
1.147 kristaps 621: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.125 kristaps 622: buffera(p, word, sz);
623: return;
624: }
625:
626: for (i = 0; i < (int)sz; i++) {
627: if ( ! isgraph((u_char)word[i])) {
628: bufferc(p, word[i]);
629: continue;
1.79 kristaps 630: }
1.125 kristaps 631:
632: if (TERMFONT_UNDER == f)
633: bufferc(p, '_');
634: else
635: bufferc(p, word[i]);
636:
637: bufferc(p, 8);
638: bufferc(p, word[i]);
1.79 kristaps 639: }
640: }
1.106 kristaps 641:
642:
1.107 kristaps 643: size_t
1.149 kristaps 644: term_len(const struct termp *p, size_t sz)
645: {
646:
647: return((*p->width)(p, ' ') * sz);
648: }
649:
650:
651: size_t
652: term_strlen(const struct termp *p, const char *cp)
653: {
654: size_t sz;
655:
656: for (sz = 0; *cp; cp++)
657: sz += (*p->width)(p, *cp);
658:
659: return(sz);
660: }
661:
662:
1.157 kristaps 663: /* ARGSUSED */
1.149 kristaps 664: size_t
665: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 666: {
667: double r;
668:
1.107 kristaps 669: switch (su->unit) {
1.106 kristaps 670: case (SCALE_CM):
1.107 kristaps 671: r = su->scale * 2;
1.106 kristaps 672: break;
673: case (SCALE_IN):
1.107 kristaps 674: r = su->scale * 6;
1.106 kristaps 675: break;
676: case (SCALE_PC):
1.107 kristaps 677: r = su->scale;
1.106 kristaps 678: break;
679: case (SCALE_PT):
1.107 kristaps 680: r = su->scale / 8;
1.106 kristaps 681: break;
682: case (SCALE_MM):
1.107 kristaps 683: r = su->scale / 1000;
1.106 kristaps 684: break;
685: case (SCALE_VS):
1.107 kristaps 686: r = su->scale;
1.106 kristaps 687: break;
688: default:
1.107 kristaps 689: r = su->scale - 1;
1.106 kristaps 690: break;
691: }
692:
693: if (r < 0.0)
694: r = 0.0;
1.107 kristaps 695: return(/* LINTED */(size_t)
1.106 kristaps 696: r);
697: }
698:
699:
1.107 kristaps 700: size_t
1.149 kristaps 701: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 702: {
1.156 kristaps 703: double v;
1.108 kristaps 704:
1.156 kristaps 705: v = ((*p->hspan)(p, su));
706: if (v < 0.0)
707: v = 0.0;
708: return((size_t) /* LINTED */
709: v);
1.106 kristaps 710: }
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