Annotation of mandoc/term.c, Revision 1.183
1.183 ! kristaps 1: /* $Id: term.c,v 1.182 2011/03/22 14:05:45 kristaps Exp $ */
1.1 kristaps 2: /*
1.159 schwarze 3: * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
1.177 schwarze 4: * Copyright (c) 2010, 2011 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"
1.107 kristaps 32: #include "out.h"
1.71 kristaps 33: #include "term.h"
1.105 kristaps 34: #include "main.h"
1.1 kristaps 35:
1.163 kristaps 36: static void spec(struct termp *, enum roffdeco,
37: const char *, size_t);
1.125 kristaps 38: static void res(struct termp *, const char *, size_t);
39: static void bufferc(struct termp *, char);
40: static void adjbuf(struct termp *p, size_t);
41: static void encode(struct termp *, const char *, size_t);
1.11 kristaps 42:
43:
1.145 kristaps 44: void
1.71 kristaps 45: term_free(struct termp *p)
1.14 kristaps 46: {
47:
1.71 kristaps 48: if (p->buf)
49: free(p->buf);
1.102 kristaps 50: if (p->symtab)
1.101 kristaps 51: chars_free(p->symtab);
1.145 kristaps 52:
1.142 kristaps 53: free(p);
54: }
55:
56:
57: void
58: term_begin(struct termp *p, term_margin head,
59: term_margin foot, const void *arg)
60: {
61:
62: p->headf = head;
63: p->footf = foot;
64: p->argf = arg;
1.146 kristaps 65: (*p->begin)(p);
1.142 kristaps 66: }
67:
68:
69: void
70: term_end(struct termp *p)
71: {
72:
1.146 kristaps 73: (*p->end)(p);
1.14 kristaps 74: }
75:
76:
1.145 kristaps 77: struct termp *
78: term_alloc(enum termenc enc)
1.14 kristaps 79: {
1.141 kristaps 80: struct termp *p;
1.14 kristaps 81:
1.179 kristaps 82: p = mandoc_calloc(1, sizeof(struct termp));
1.71 kristaps 83: p->enc = enc;
84: return(p);
1.14 kristaps 85: }
86:
87:
1.71 kristaps 88: /*
89: * Flush a line of text. A "line" is loosely defined as being something
90: * that should be followed by a newline, regardless of whether it's
91: * broken apart by newlines getting there. A line can also be a
1.130 kristaps 92: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
93: * not have a trailing newline.
1.71 kristaps 94: *
1.130 kristaps 95: * The following flags may be specified:
1.71 kristaps 96: *
97: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
98: * offset value. This is useful when doing columnar lists where the
99: * prior column has right-padded.
100: *
101: * - TERMP_NOBREAK: this is the most important and is used when making
102: * columns. In short: don't print a newline and instead pad to the
103: * right margin. Used in conjunction with TERMP_NOLPAD.
104: *
1.91 kristaps 105: * - TERMP_TWOSPACE: when padding, make sure there are at least two
106: * space characters of padding. Otherwise, rather break the line.
107: *
1.84 kristaps 108: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
109: * the line is overrun, and don't pad-right if it's underrun.
110: *
111: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
112: * overruning, instead save the position and continue at that point
113: * when the next invocation.
1.71 kristaps 114: *
115: * In-line line breaking:
116: *
117: * If TERMP_NOBREAK is specified and the line overruns the right
118: * margin, it will break and pad-right to the right margin after
119: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 120: * writing from the right-margin, which will lead to the above scenario
121: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 122: */
123: void
124: term_flushln(struct termp *p)
1.53 kristaps 125: {
1.114 kristaps 126: int i; /* current input position in p->buf */
127: size_t vis; /* current visual position on output */
128: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 129: size_t vend; /* end of word visual position on output */
1.114 kristaps 130: size_t bp; /* visual right border position */
1.172 schwarze 131: size_t dv; /* temporary for visual pos calculations */
1.152 kristaps 132: int j; /* temporary loop index for p->buf */
133: int jhy; /* last hyph before overflow w/r/t j */
134: size_t maxvis; /* output position of visible boundary */
135: size_t mmax; /* used in calculating bp */
1.53 kristaps 136:
1.71 kristaps 137: /*
138: * First, establish the maximum columns of "visible" content.
139: * This is usually the difference between the right-margin and
140: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 141: * small set of values.
1.71 kristaps 142: */
1.175 kristaps 143: assert (p->rmargin >= p->offset);
1.174 schwarze 144: dv = p->rmargin - p->offset;
145: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
146: dv = p->maxrmargin - p->offset;
147: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 148:
1.71 kristaps 149: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 150:
1.136 schwarze 151: /*
152: * Indent the first line of a paragraph.
153: */
1.174 schwarze 154: vbl = p->flags & TERMP_NOLPAD ? (size_t)0 : p->offset;
1.136 schwarze 155:
1.174 schwarze 156: vis = vend = 0;
157: i = 0;
1.115 kristaps 158:
1.136 schwarze 159: while (i < (int)p->col) {
1.71 kristaps 160: /*
1.154 kristaps 161: * Handle literal tab characters: collapse all
162: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 163: */
1.169 schwarze 164: while (i < (int)p->col && '\t' == p->buf[i]) {
1.154 kristaps 165: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 166: vbl += vend - vis;
167: vis = vend;
1.169 schwarze 168: i++;
1.138 schwarze 169: }
170:
171: /*
1.71 kristaps 172: * Count up visible word characters. Control sequences
173: * (starting with the CSI) aren't counted. A space
174: * generates a non-printing word, which is valid (the
175: * space is printed according to regular spacing rules).
176: */
177:
1.169 schwarze 178: for (j = i, jhy = 0; j < (int)p->col; j++) {
1.138 schwarze 179: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 180: break;
1.154 kristaps 181:
182: /* Back over the the last printed character. */
183: if (8 == p->buf[j]) {
1.153 kristaps 184: assert(j);
185: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 186: continue;
1.153 kristaps 187: }
1.154 kristaps 188:
189: /* Regular word. */
190: /* Break at the hyphen point if we overrun. */
191: if (vend > vis && vend < bp &&
192: ASCII_HYPH == p->buf[j])
193: jhy = j;
194:
195: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 196: }
1.53 kristaps 197:
1.71 kristaps 198: /*
1.81 kristaps 199: * Find out whether we would exceed the right margin.
1.136 schwarze 200: * If so, break to the next line.
1.81 kristaps 201: */
1.140 kristaps 202: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 203: vend -= vis;
1.146 kristaps 204: (*p->endline)(p);
1.81 kristaps 205: if (TERMP_NOBREAK & p->flags) {
1.139 schwarze 206: p->viscol = p->rmargin;
1.146 kristaps 207: (*p->advance)(p, p->rmargin);
1.136 schwarze 208: vend += p->rmargin - p->offset;
1.81 kristaps 209: } else {
1.139 schwarze 210: p->viscol = 0;
1.136 schwarze 211: vbl = p->offset;
1.81 kristaps 212: }
1.130 kristaps 213:
1.129 kristaps 214: /* Remove the p->overstep width. */
1.130 kristaps 215:
1.174 schwarze 216: bp += (size_t)p->overstep;
1.129 kristaps 217: p->overstep = 0;
1.71 kristaps 218: }
1.138 schwarze 219:
1.130 kristaps 220: /* Write out the [remaining] word. */
1.136 schwarze 221: for ( ; i < (int)p->col; i++) {
1.140 kristaps 222: if (vend > bp && jhy > 0 && i > jhy)
223: break;
1.138 schwarze 224: if ('\t' == p->buf[i])
225: break;
1.136 schwarze 226: if (' ' == p->buf[i]) {
1.164 kristaps 227: j = i;
228: while (' ' == p->buf[i])
1.136 schwarze 229: i++;
1.174 schwarze 230: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.172 schwarze 231: vbl += dv;
232: vend += dv;
1.71 kristaps 233: break;
1.136 schwarze 234: }
235: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 236: vbl += (*p->width)(p, ' ');
1.136 schwarze 237: continue;
238: }
1.130 kristaps 239:
1.136 schwarze 240: /*
241: * Now we definitely know there will be
242: * printable characters to output,
243: * so write preceding white space now.
244: */
245: if (vbl) {
1.146 kristaps 246: (*p->advance)(p, vbl);
1.139 schwarze 247: p->viscol += vbl;
1.136 schwarze 248: vbl = 0;
249: }
1.140 kristaps 250:
1.153 kristaps 251: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 252: (*p->letter)(p, '-');
1.153 kristaps 253: p->viscol += (*p->width)(p, '-');
254: } else {
1.146 kristaps 255: (*p->letter)(p, p->buf[i]);
1.153 kristaps 256: p->viscol += (*p->width)(p, p->buf[i]);
257: }
1.136 schwarze 258: }
259: vis = vend;
1.71 kristaps 260: }
1.168 schwarze 261:
262: /*
263: * If there was trailing white space, it was not printed;
264: * so reset the cursor position accordingly.
265: */
266: vis -= vbl;
1.111 kristaps 267:
1.91 kristaps 268: p->col = 0;
1.129 kristaps 269: p->overstep = 0;
1.15 kristaps 270:
1.91 kristaps 271: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 272: p->viscol = 0;
1.146 kristaps 273: (*p->endline)(p);
1.15 kristaps 274: return;
1.71 kristaps 275: }
1.15 kristaps 276:
1.91 kristaps 277: if (TERMP_HANG & p->flags) {
278: /* We need one blank after the tag. */
1.174 schwarze 279: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.91 kristaps 280:
281: /*
282: * Behave exactly the same way as groff:
1.92 kristaps 283: * If we have overstepped the margin, temporarily move
284: * it to the right and flag the rest of the line to be
285: * shorter.
1.91 kristaps 286: * If we landed right at the margin, be happy.
1.92 kristaps 287: * If we are one step before the margin, temporarily
288: * move it one step LEFT and flag the rest of the line
289: * to be longer.
1.91 kristaps 290: */
1.129 kristaps 291: if (p->overstep >= -1) {
292: assert((int)maxvis + p->overstep >= 0);
1.174 schwarze 293: maxvis += (size_t)p->overstep;
1.92 kristaps 294: } else
1.129 kristaps 295: p->overstep = 0;
1.91 kristaps 296:
297: } else if (TERMP_DANGLE & p->flags)
298: return;
1.15 kristaps 299:
1.92 kristaps 300: /* Right-pad. */
1.174 schwarze 301: if (maxvis > vis +
302: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.139 schwarze 303: p->viscol += maxvis - vis;
1.146 kristaps 304: (*p->advance)(p, maxvis - vis);
1.142 kristaps 305: vis += (maxvis - vis);
1.139 schwarze 306: } else { /* ...or newline break. */
1.146 kristaps 307: (*p->endline)(p);
1.139 schwarze 308: p->viscol = p->rmargin;
1.146 kristaps 309: (*p->advance)(p, p->rmargin);
1.91 kristaps 310: }
1.15 kristaps 311: }
312:
313:
1.71 kristaps 314: /*
315: * A newline only breaks an existing line; it won't assert vertical
316: * space. All data in the output buffer is flushed prior to the newline
317: * assertion.
318: */
319: void
320: term_newln(struct termp *p)
1.15 kristaps 321: {
322:
1.71 kristaps 323: p->flags |= TERMP_NOSPACE;
1.139 schwarze 324: if (0 == p->col && 0 == p->viscol) {
1.71 kristaps 325: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 326: return;
1.16 kristaps 327: }
1.71 kristaps 328: term_flushln(p);
329: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 330: }
331:
332:
1.71 kristaps 333: /*
334: * Asserts a vertical space (a full, empty line-break between lines).
335: * Note that if used twice, this will cause two blank spaces and so on.
336: * All data in the output buffer is flushed prior to the newline
337: * assertion.
338: */
339: void
340: term_vspace(struct termp *p)
1.16 kristaps 341: {
342:
1.62 kristaps 343: term_newln(p);
1.139 schwarze 344: p->viscol = 0;
1.146 kristaps 345: (*p->endline)(p);
1.16 kristaps 346: }
347:
348:
1.71 kristaps 349: static void
1.177 schwarze 350: numbered(struct termp *p, const char *word, size_t len)
351: {
352: const char *rhs;
353:
354: rhs = chars_num2char(word, len);
355: if (rhs)
356: encode(p, rhs, 1);
357: }
358:
359:
360: static void
1.163 kristaps 361: spec(struct termp *p, enum roffdeco d, const char *word, size_t len)
1.17 kristaps 362: {
1.71 kristaps 363: const char *rhs;
364: size_t sz;
1.17 kristaps 365:
1.161 kristaps 366: rhs = chars_spec2str(p->symtab, word, len, &sz);
1.125 kristaps 367: if (rhs)
368: encode(p, rhs, sz);
1.163 kristaps 369: else if (DECO_SSPECIAL == d)
370: encode(p, word, len);
1.94 kristaps 371: }
372:
373:
374: static void
1.125 kristaps 375: res(struct termp *p, const char *word, size_t len)
1.94 kristaps 376: {
377: const char *rhs;
378: size_t sz;
379:
1.161 kristaps 380: rhs = chars_res2str(p->symtab, word, len, &sz);
1.125 kristaps 381: if (rhs)
382: encode(p, rhs, sz);
383: }
384:
385:
386: void
387: term_fontlast(struct termp *p)
388: {
389: enum termfont f;
390:
391: f = p->fontl;
392: p->fontl = p->fontq[p->fonti];
393: p->fontq[p->fonti] = f;
394: }
395:
396:
397: void
398: term_fontrepl(struct termp *p, enum termfont f)
399: {
400:
401: p->fontl = p->fontq[p->fonti];
402: p->fontq[p->fonti] = f;
403: }
404:
405:
406: void
407: term_fontpush(struct termp *p, enum termfont f)
408: {
409:
410: assert(p->fonti + 1 < 10);
411: p->fontl = p->fontq[p->fonti];
412: p->fontq[++p->fonti] = f;
413: }
414:
415:
416: const void *
417: term_fontq(struct termp *p)
418: {
419:
420: return(&p->fontq[p->fonti]);
421: }
422:
423:
424: enum termfont
425: term_fonttop(struct termp *p)
426: {
427:
428: return(p->fontq[p->fonti]);
429: }
430:
431:
432: void
433: term_fontpopq(struct termp *p, const void *key)
434: {
435:
436: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
437: p->fonti--;
438: assert(p->fonti >= 0);
439: }
1.94 kristaps 440:
1.125 kristaps 441:
442: void
443: term_fontpop(struct termp *p)
444: {
445:
446: assert(p->fonti);
447: p->fonti--;
1.17 kristaps 448: }
449:
450:
1.71 kristaps 451: /*
452: * Handle pwords, partial words, which may be either a single word or a
453: * phrase that cannot be broken down (such as a literal string). This
454: * handles word styling.
455: */
1.86 kristaps 456: void
457: term_word(struct termp *p, const char *word)
1.65 kristaps 458: {
1.183 ! kristaps 459: const char *seq;
1.124 kristaps 460: size_t ssz;
461: enum roffdeco deco;
1.100 kristaps 462:
1.133 kristaps 463: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 464: if ( ! (TERMP_KEEP & p->flags)) {
465: if (TERMP_PREKEEP & p->flags)
466: p->flags |= TERMP_KEEP;
1.133 kristaps 467: bufferc(p, ' ');
1.151 schwarze 468: if (TERMP_SENTENCE & p->flags)
469: bufferc(p, ' ');
470: } else
471: bufferc(p, ASCII_NBRSP);
1.133 kristaps 472: }
1.65 kristaps 473:
1.71 kristaps 474: if ( ! (p->flags & TERMP_NONOSPACE))
475: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 476: else
477: p->flags |= TERMP_NOSPACE;
1.133 kristaps 478:
1.173 schwarze 479: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.65 kristaps 480:
1.162 kristaps 481: while (*word) {
482: if ((ssz = strcspn(word, "\\")) > 0)
483: encode(p, word, ssz);
1.124 kristaps 484:
1.178 kristaps 485: word += (int)ssz;
1.162 kristaps 486: if ('\\' != *word)
1.124 kristaps 487: continue;
488:
489: seq = ++word;
1.171 kristaps 490: word += a2roffdeco(&deco, &seq, &ssz);
1.124 kristaps 491:
492: switch (deco) {
1.177 schwarze 493: case (DECO_NUMBERED):
494: numbered(p, seq, ssz);
495: break;
1.124 kristaps 496: case (DECO_RESERVED):
1.125 kristaps 497: res(p, seq, ssz);
1.124 kristaps 498: break;
499: case (DECO_SPECIAL):
1.163 kristaps 500: /* FALLTHROUGH */
501: case (DECO_SSPECIAL):
502: spec(p, deco, seq, ssz);
1.124 kristaps 503: break;
504: case (DECO_BOLD):
1.125 kristaps 505: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 506: break;
507: case (DECO_ITALIC):
1.125 kristaps 508: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 509: break;
510: case (DECO_ROMAN):
1.125 kristaps 511: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 512: break;
513: case (DECO_PREVIOUS):
1.125 kristaps 514: term_fontlast(p);
1.124 kristaps 515: break;
516: default:
517: break;
518: }
1.127 kristaps 519:
520: if (DECO_NOSPACE == deco && '\0' == *word)
521: p->flags |= TERMP_NOSPACE;
1.124 kristaps 522: }
1.65 kristaps 523: }
524:
525:
1.71 kristaps 526: static void
1.125 kristaps 527: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 528: {
529:
1.125 kristaps 530: if (0 == p->maxcols)
531: p->maxcols = 1024;
532: while (sz >= p->maxcols)
533: p->maxcols <<= 2;
534:
1.179 kristaps 535: p->buf = mandoc_realloc(p->buf, p->maxcols);
1.51 kristaps 536: }
537:
1.79 kristaps 538:
539: static void
1.125 kristaps 540: bufferc(struct termp *p, char c)
541: {
542:
543: if (p->col + 1 >= p->maxcols)
544: adjbuf(p, p->col + 1);
545:
1.126 kristaps 546: p->buf[(int)p->col++] = c;
1.125 kristaps 547: }
548:
549:
550: static void
551: encode(struct termp *p, const char *word, size_t sz)
552: {
553: enum termfont f;
554: int i;
555:
556: /*
557: * Encode and buffer a string of characters. If the current
558: * font mode is unset, buffer directly, else encode then buffer
559: * character by character.
560: */
561:
1.147 kristaps 562: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.165 kristaps 563: if (p->col + sz >= p->maxcols)
564: adjbuf(p, p->col + sz);
565: memcpy(&p->buf[(int)p->col], word, sz);
566: p->col += sz;
1.125 kristaps 567: return;
568: }
569:
1.165 kristaps 570: /* Pre-buffer, assuming worst-case. */
571:
572: if (p->col + 1 + (sz * 3) >= p->maxcols)
573: adjbuf(p, p->col + 1 + (sz * 3));
574:
1.125 kristaps 575: for (i = 0; i < (int)sz; i++) {
576: if ( ! isgraph((u_char)word[i])) {
1.165 kristaps 577: p->buf[(int)p->col++] = word[i];
1.125 kristaps 578: continue;
1.79 kristaps 579: }
1.125 kristaps 580:
581: if (TERMFONT_UNDER == f)
1.165 kristaps 582: p->buf[(int)p->col++] = '_';
1.125 kristaps 583: else
1.165 kristaps 584: p->buf[(int)p->col++] = word[i];
1.125 kristaps 585:
1.165 kristaps 586: p->buf[(int)p->col++] = 8;
587: p->buf[(int)p->col++] = word[i];
1.79 kristaps 588: }
589: }
1.106 kristaps 590:
591:
1.107 kristaps 592: size_t
1.149 kristaps 593: term_len(const struct termp *p, size_t sz)
594: {
595:
596: return((*p->width)(p, ' ') * sz);
597: }
598:
599:
600: size_t
601: term_strlen(const struct termp *p, const char *cp)
602: {
1.171 kristaps 603: size_t sz, ssz, rsz, i;
604: enum roffdeco d;
605: const char *seq, *rhs;
606:
607: for (sz = 0; '\0' != *cp; )
608: /*
609: * Account for escaped sequences within string length
610: * calculations. This follows the logic in term_word()
611: * as we must calculate the width of produced strings.
612: */
613: if ('\\' == *cp) {
614: seq = ++cp;
615: cp += a2roffdeco(&d, &seq, &ssz);
616:
617: switch (d) {
618: case (DECO_RESERVED):
619: rhs = chars_res2str
620: (p->symtab, seq, ssz, &rsz);
621: break;
622: case (DECO_SPECIAL):
623: /* FALLTHROUGH */
624: case (DECO_SSPECIAL):
625: rhs = chars_spec2str
626: (p->symtab, seq, ssz, &rsz);
627:
628: /* Allow for one-char escapes. */
629: if (DECO_SSPECIAL != d || rhs)
630: break;
631:
632: rhs = seq;
633: rsz = ssz;
634: break;
635: default:
636: rhs = NULL;
637: break;
638: }
1.149 kristaps 639:
1.171 kristaps 640: if (rhs)
641: for (i = 0; i < rsz; i++)
642: sz += (*p->width)(p, *rhs++);
1.176 kristaps 643: } else if (ASCII_NBRSP == *cp) {
644: sz += (*p->width)(p, ' ');
645: cp++;
646: } else if (ASCII_HYPH == *cp) {
647: sz += (*p->width)(p, '-');
648: cp++;
1.171 kristaps 649: } else
650: sz += (*p->width)(p, *cp++);
1.149 kristaps 651:
652: return(sz);
653: }
654:
655:
1.157 kristaps 656: /* ARGSUSED */
1.149 kristaps 657: size_t
658: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 659: {
660: double r;
661:
1.107 kristaps 662: switch (su->unit) {
1.106 kristaps 663: case (SCALE_CM):
1.107 kristaps 664: r = su->scale * 2;
1.106 kristaps 665: break;
666: case (SCALE_IN):
1.107 kristaps 667: r = su->scale * 6;
1.106 kristaps 668: break;
669: case (SCALE_PC):
1.107 kristaps 670: r = su->scale;
1.106 kristaps 671: break;
672: case (SCALE_PT):
1.107 kristaps 673: r = su->scale / 8;
1.106 kristaps 674: break;
675: case (SCALE_MM):
1.107 kristaps 676: r = su->scale / 1000;
1.106 kristaps 677: break;
678: case (SCALE_VS):
1.107 kristaps 679: r = su->scale;
1.106 kristaps 680: break;
681: default:
1.107 kristaps 682: r = su->scale - 1;
1.106 kristaps 683: break;
684: }
685:
686: if (r < 0.0)
687: r = 0.0;
1.107 kristaps 688: return(/* LINTED */(size_t)
1.106 kristaps 689: r);
690: }
691:
692:
1.107 kristaps 693: size_t
1.149 kristaps 694: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 695: {
1.156 kristaps 696: double v;
1.108 kristaps 697:
1.156 kristaps 698: v = ((*p->hspan)(p, su));
699: if (v < 0.0)
700: v = 0.0;
701: return((size_t) /* LINTED */
702: v);
1.106 kristaps 703: }
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