Annotation of src/usr.bin/mandoc/term.c, Revision 1.57
1.57 ! schwarze 1: /* $Id: term.c,v 1.56 2011/01/30 16:05:29 schwarze Exp $ */
1.1 kristaps 2: /*
1.44 schwarze 3: * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
1.56 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
1.2 schwarze 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: *
1.2 schwarze 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: */
1.20 schwarze 18: #include <sys/types.h>
19:
1.1 kristaps 20: #include <assert.h>
1.20 schwarze 21: #include <ctype.h>
1.36 schwarze 22: #include <stdint.h>
1.1 kristaps 23: #include <stdio.h>
24: #include <stdlib.h>
25: #include <string.h>
26:
1.34 schwarze 27: #include "mandoc.h"
1.15 schwarze 28: #include "chars.h"
1.16 schwarze 29: #include "out.h"
1.1 kristaps 30: #include "term.h"
1.16 schwarze 31: #include "main.h"
1.1 kristaps 32:
1.45 schwarze 33: static void spec(struct termp *, enum roffdeco,
34: const char *, size_t);
1.20 schwarze 35: static void res(struct termp *, const char *, size_t);
36: static void bufferc(struct termp *, char);
37: static void adjbuf(struct termp *p, size_t);
38: static void encode(struct termp *, const char *, size_t);
1.1 kristaps 39:
40:
1.37 schwarze 41: void
42: term_free(struct termp *p)
1.1 kristaps 43: {
44:
1.37 schwarze 45: if (p->buf)
46: free(p->buf);
47: if (p->symtab)
48: chars_free(p->symtab);
49:
50: free(p);
1.1 kristaps 51: }
52:
53:
1.13 schwarze 54: void
1.37 schwarze 55: term_begin(struct termp *p, term_margin head,
56: term_margin foot, const void *arg)
1.1 kristaps 57: {
58:
1.37 schwarze 59: p->headf = head;
60: p->footf = foot;
61: p->argf = arg;
62: (*p->begin)(p);
1.1 kristaps 63: }
64:
65:
1.37 schwarze 66: void
67: term_end(struct termp *p)
1.1 kristaps 68: {
69:
1.37 schwarze 70: (*p->end)(p);
1.1 kristaps 71: }
72:
73:
1.37 schwarze 74: struct termp *
75: term_alloc(enum termenc enc)
1.1 kristaps 76: {
1.36 schwarze 77: struct termp *p;
1.1 kristaps 78:
1.57 ! schwarze 79: p = mandoc_calloc(1, sizeof(struct termp));
1.1 kristaps 80: p->enc = enc;
81: return(p);
82: }
83:
84:
85: /*
86: * Flush a line of text. A "line" is loosely defined as being something
87: * that should be followed by a newline, regardless of whether it's
88: * broken apart by newlines getting there. A line can also be a
1.27 schwarze 89: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
90: * not have a trailing newline.
1.1 kristaps 91: *
1.27 schwarze 92: * The following flags may be specified:
1.1 kristaps 93: *
94: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
95: * offset value. This is useful when doing columnar lists where the
96: * prior column has right-padded.
97: *
98: * - TERMP_NOBREAK: this is the most important and is used when making
99: * columns. In short: don't print a newline and instead pad to the
100: * right margin. Used in conjunction with TERMP_NOLPAD.
101: *
1.9 schwarze 102: * - TERMP_TWOSPACE: when padding, make sure there are at least two
103: * space characters of padding. Otherwise, rather break the line.
104: *
1.6 schwarze 105: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
106: * the line is overrun, and don't pad-right if it's underrun.
107: *
108: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
109: * overruning, instead save the position and continue at that point
110: * when the next invocation.
1.1 kristaps 111: *
112: * In-line line breaking:
113: *
114: * If TERMP_NOBREAK is specified and the line overruns the right
115: * margin, it will break and pad-right to the right margin after
116: * writing. If maxrmargin is violated, it will break and continue
1.19 schwarze 117: * writing from the right-margin, which will lead to the above scenario
118: * upon exit. Otherwise, the line will break at the right margin.
1.1 kristaps 119: */
120: void
121: term_flushln(struct termp *p)
122: {
1.19 schwarze 123: int i; /* current input position in p->buf */
124: size_t vis; /* current visual position on output */
125: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 126: size_t vend; /* end of word visual position on output */
1.19 schwarze 127: size_t bp; /* visual right border position */
1.51 schwarze 128: size_t dv; /* temporary for visual pos calculations */
1.42 schwarze 129: int j; /* temporary loop index for p->buf */
130: int jhy; /* last hyph before overflow w/r/t j */
131: size_t maxvis; /* output position of visible boundary */
132: size_t mmax; /* used in calculating bp */
1.1 kristaps 133:
134: /*
135: * First, establish the maximum columns of "visible" content.
136: * This is usually the difference between the right-margin and
137: * an indentation, but can be, for tagged lists or columns, a
1.19 schwarze 138: * small set of values.
1.1 kristaps 139: */
1.54 schwarze 140: assert (p->rmargin >= p->offset);
1.53 schwarze 141: dv = p->rmargin - p->offset;
142: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
143: dv = p->maxrmargin - p->offset;
144: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 145:
1.1 kristaps 146: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.19 schwarze 147:
1.33 schwarze 148: /*
149: * Indent the first line of a paragraph.
150: */
1.53 schwarze 151: vbl = p->flags & TERMP_NOLPAD ? (size_t)0 : p->offset;
1.33 schwarze 152:
1.53 schwarze 153: vis = vend = 0;
154: i = 0;
1.19 schwarze 155:
1.22 schwarze 156: while (i < (int)p->col) {
157: /*
1.42 schwarze 158: * Handle literal tab characters: collapse all
159: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 160: */
1.49 schwarze 161: while (i < (int)p->col && '\t' == p->buf[i]) {
1.42 schwarze 162: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 163: vbl += vend - vis;
164: vis = vend;
1.49 schwarze 165: i++;
1.30 schwarze 166: }
1.22 schwarze 167:
1.1 kristaps 168: /*
169: * Count up visible word characters. Control sequences
170: * (starting with the CSI) aren't counted. A space
171: * generates a non-printing word, which is valid (the
172: * space is printed according to regular spacing rules).
173: */
174:
1.49 schwarze 175: for (j = i, jhy = 0; j < (int)p->col; j++) {
1.30 schwarze 176: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.1 kristaps 177: break;
1.42 schwarze 178:
179: /* Back over the the last printed character. */
180: if (8 == p->buf[j]) {
181: assert(j);
182: vend -= (*p->width)(p, p->buf[j - 1]);
183: continue;
184: }
185:
186: /* Regular word. */
187: /* Break at the hyphen point if we overrun. */
188: if (vend > vis && vend < bp &&
189: ASCII_HYPH == p->buf[j])
190: jhy = j;
191:
192: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 193: }
194:
195: /*
1.5 schwarze 196: * Find out whether we would exceed the right margin.
1.33 schwarze 197: * If so, break to the next line.
1.5 schwarze 198: */
1.33 schwarze 199: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 200: vend -= vis;
1.37 schwarze 201: (*p->endline)(p);
1.5 schwarze 202: if (TERMP_NOBREAK & p->flags) {
1.29 schwarze 203: p->viscol = p->rmargin;
1.37 schwarze 204: (*p->advance)(p, p->rmargin);
1.22 schwarze 205: vend += p->rmargin - p->offset;
1.5 schwarze 206: } else {
1.33 schwarze 207: p->viscol = 0;
208: vbl = p->offset;
1.5 schwarze 209: }
1.33 schwarze 210:
1.26 schwarze 211: /* Remove the p->overstep width. */
1.33 schwarze 212:
1.53 schwarze 213: bp += (size_t)p->overstep;
1.26 schwarze 214: p->overstep = 0;
1.1 kristaps 215: }
1.30 schwarze 216:
1.33 schwarze 217: /* Write out the [remaining] word. */
1.1 kristaps 218: for ( ; i < (int)p->col; i++) {
1.25 schwarze 219: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 220: break;
221: if ('\t' == p->buf[i])
1.1 kristaps 222: break;
1.22 schwarze 223: if (' ' == p->buf[i]) {
1.46 schwarze 224: j = i;
225: while (' ' == p->buf[i])
1.33 schwarze 226: i++;
1.53 schwarze 227: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.51 schwarze 228: vbl += dv;
229: vend += dv;
1.22 schwarze 230: break;
231: }
1.33 schwarze 232: if (ASCII_NBRSP == p->buf[i]) {
1.42 schwarze 233: vbl += (*p->width)(p, ' ');
1.33 schwarze 234: continue;
235: }
236:
237: /*
238: * Now we definitely know there will be
239: * printable characters to output,
240: * so write preceding white space now.
241: */
242: if (vbl) {
1.37 schwarze 243: (*p->advance)(p, vbl);
1.33 schwarze 244: p->viscol += vbl;
245: vbl = 0;
246: }
1.35 schwarze 247:
1.42 schwarze 248: if (ASCII_HYPH == p->buf[i]) {
1.37 schwarze 249: (*p->letter)(p, '-');
1.42 schwarze 250: p->viscol += (*p->width)(p, '-');
251: } else {
1.37 schwarze 252: (*p->letter)(p, p->buf[i]);
1.42 schwarze 253: p->viscol += (*p->width)(p, p->buf[i]);
254: }
1.1 kristaps 255: }
1.22 schwarze 256: vis = vend;
1.1 kristaps 257: }
1.48 schwarze 258:
259: /*
260: * If there was trailing white space, it was not printed;
261: * so reset the cursor position accordingly.
262: */
263: vis -= vbl;
1.18 schwarze 264:
1.9 schwarze 265: p->col = 0;
1.26 schwarze 266: p->overstep = 0;
1.1 kristaps 267:
1.9 schwarze 268: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 269: p->viscol = 0;
1.37 schwarze 270: (*p->endline)(p);
1.1 kristaps 271: return;
272: }
273:
1.9 schwarze 274: if (TERMP_HANG & p->flags) {
275: /* We need one blank after the tag. */
1.53 schwarze 276: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.9 schwarze 277:
278: /*
279: * Behave exactly the same way as groff:
280: * If we have overstepped the margin, temporarily move
281: * it to the right and flag the rest of the line to be
282: * shorter.
283: * If we landed right at the margin, be happy.
284: * If we are one step before the margin, temporarily
285: * move it one step LEFT and flag the rest of the line
286: * to be longer.
287: */
1.26 schwarze 288: if (p->overstep >= -1) {
289: assert((int)maxvis + p->overstep >= 0);
1.53 schwarze 290: maxvis += (size_t)p->overstep;
1.9 schwarze 291: } else
1.26 schwarze 292: p->overstep = 0;
1.9 schwarze 293:
294: } else if (TERMP_DANGLE & p->flags)
295: return;
1.1 kristaps 296:
1.9 schwarze 297: /* Right-pad. */
1.53 schwarze 298: if (maxvis > vis +
299: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.29 schwarze 300: p->viscol += maxvis - vis;
1.37 schwarze 301: (*p->advance)(p, maxvis - vis);
302: vis += (maxvis - vis);
1.29 schwarze 303: } else { /* ...or newline break. */
1.37 schwarze 304: (*p->endline)(p);
1.29 schwarze 305: p->viscol = p->rmargin;
1.37 schwarze 306: (*p->advance)(p, p->rmargin);
1.9 schwarze 307: }
1.1 kristaps 308: }
309:
310:
311: /*
312: * A newline only breaks an existing line; it won't assert vertical
313: * space. All data in the output buffer is flushed prior to the newline
314: * assertion.
315: */
316: void
317: term_newln(struct termp *p)
318: {
319:
320: p->flags |= TERMP_NOSPACE;
1.29 schwarze 321: if (0 == p->col && 0 == p->viscol) {
1.1 kristaps 322: p->flags &= ~TERMP_NOLPAD;
323: return;
324: }
325: term_flushln(p);
326: p->flags &= ~TERMP_NOLPAD;
327: }
328:
329:
330: /*
331: * Asserts a vertical space (a full, empty line-break between lines).
332: * Note that if used twice, this will cause two blank spaces and so on.
333: * All data in the output buffer is flushed prior to the newline
334: * assertion.
335: */
336: void
337: term_vspace(struct termp *p)
338: {
339:
340: term_newln(p);
1.29 schwarze 341: p->viscol = 0;
1.37 schwarze 342: (*p->endline)(p);
1.1 kristaps 343: }
344:
345:
346: static void
1.56 schwarze 347: numbered(struct termp *p, const char *word, size_t len)
348: {
349: const char *rhs;
350:
351: rhs = chars_num2char(word, len);
352: if (rhs)
353: encode(p, rhs, 1);
354: }
355:
356:
357: static void
1.45 schwarze 358: spec(struct termp *p, enum roffdeco d, const char *word, size_t len)
1.1 kristaps 359: {
360: const char *rhs;
361: size_t sz;
362:
1.45 schwarze 363: rhs = chars_spec2str(p->symtab, word, len, &sz);
1.20 schwarze 364: if (rhs)
365: encode(p, rhs, sz);
1.45 schwarze 366: else if (DECO_SSPECIAL == d)
367: encode(p, word, len);
1.11 schwarze 368: }
369:
370:
371: static void
1.20 schwarze 372: res(struct termp *p, const char *word, size_t len)
1.11 schwarze 373: {
374: const char *rhs;
375: size_t sz;
376:
1.45 schwarze 377: rhs = chars_res2str(p->symtab, word, len, &sz);
1.20 schwarze 378: if (rhs)
379: encode(p, rhs, sz);
380: }
381:
382:
383: void
384: term_fontlast(struct termp *p)
385: {
386: enum termfont f;
1.11 schwarze 387:
1.20 schwarze 388: f = p->fontl;
389: p->fontl = p->fontq[p->fonti];
390: p->fontq[p->fonti] = f;
391: }
392:
393:
394: void
395: term_fontrepl(struct termp *p, enum termfont f)
396: {
397:
398: p->fontl = p->fontq[p->fonti];
399: p->fontq[p->fonti] = f;
1.1 kristaps 400: }
401:
402:
1.20 schwarze 403: void
404: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 405: {
1.7 schwarze 406:
1.20 schwarze 407: assert(p->fonti + 1 < 10);
408: p->fontl = p->fontq[p->fonti];
409: p->fontq[++p->fonti] = f;
410: }
1.1 kristaps 411:
412:
1.20 schwarze 413: const void *
414: term_fontq(struct termp *p)
415: {
1.1 kristaps 416:
1.20 schwarze 417: return(&p->fontq[p->fonti]);
418: }
1.1 kristaps 419:
420:
1.20 schwarze 421: enum termfont
422: term_fonttop(struct termp *p)
423: {
1.1 kristaps 424:
1.20 schwarze 425: return(p->fontq[p->fonti]);
426: }
1.7 schwarze 427:
428:
1.20 schwarze 429: void
430: term_fontpopq(struct termp *p, const void *key)
431: {
1.1 kristaps 432:
1.20 schwarze 433: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
434: p->fonti--;
435: assert(p->fonti >= 0);
436: }
1.1 kristaps 437:
438:
1.20 schwarze 439: void
440: term_fontpop(struct termp *p)
441: {
1.1 kristaps 442:
1.20 schwarze 443: assert(p->fonti);
444: p->fonti--;
1.1 kristaps 445: }
446:
447:
448: /*
449: * Handle pwords, partial words, which may be either a single word or a
450: * phrase that cannot be broken down (such as a literal string). This
451: * handles word styling.
452: */
1.7 schwarze 453: void
454: term_word(struct termp *p, const char *word)
1.1 kristaps 455: {
1.20 schwarze 456: const char *sv, *seq;
457: size_t ssz;
458: enum roffdeco deco;
1.1 kristaps 459:
1.14 schwarze 460: sv = word;
461:
1.57 ! schwarze 462: if (DELIM_CLOSE == mandoc_isdelim(word))
! 463: if ( ! (TERMP_IGNDELIM & p->flags))
! 464: p->flags |= TERMP_NOSPACE;
1.1 kristaps 465:
1.31 schwarze 466: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 467: if ( ! (TERMP_KEEP & p->flags)) {
468: if (TERMP_PREKEEP & p->flags)
469: p->flags |= TERMP_KEEP;
1.31 schwarze 470: bufferc(p, ' ');
1.40 schwarze 471: if (TERMP_SENTENCE & p->flags)
472: bufferc(p, ' ');
473: } else
474: bufferc(p, ASCII_NBRSP);
1.31 schwarze 475: }
1.1 kristaps 476:
477: if ( ! (p->flags & TERMP_NONOSPACE))
478: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 479: else
480: p->flags |= TERMP_NOSPACE;
1.1 kristaps 481:
1.52 schwarze 482: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.31 schwarze 483:
1.45 schwarze 484: while (*word) {
485: if ((ssz = strcspn(word, "\\")) > 0)
486: encode(p, word, ssz);
1.20 schwarze 487:
1.57 ! schwarze 488: word += (int)ssz;
1.45 schwarze 489: if ('\\' != *word)
1.20 schwarze 490: continue;
491:
492: seq = ++word;
1.50 schwarze 493: word += a2roffdeco(&deco, &seq, &ssz);
1.20 schwarze 494:
495: switch (deco) {
1.56 schwarze 496: case (DECO_NUMBERED):
497: numbered(p, seq, ssz);
498: break;
1.20 schwarze 499: case (DECO_RESERVED):
500: res(p, seq, ssz);
501: break;
502: case (DECO_SPECIAL):
1.45 schwarze 503: /* FALLTHROUGH */
504: case (DECO_SSPECIAL):
505: spec(p, deco, seq, ssz);
1.20 schwarze 506: break;
507: case (DECO_BOLD):
508: term_fontrepl(p, TERMFONT_BOLD);
509: break;
510: case (DECO_ITALIC):
511: term_fontrepl(p, TERMFONT_UNDER);
512: break;
513: case (DECO_ROMAN):
514: term_fontrepl(p, TERMFONT_NONE);
515: break;
516: case (DECO_PREVIOUS):
517: term_fontlast(p);
518: break;
519: default:
520: break;
521: }
522:
523: if (DECO_NOSPACE == deco && '\0' == *word)
524: p->flags |= TERMP_NOSPACE;
525: }
1.1 kristaps 526:
1.57 ! schwarze 527: if (DELIM_OPEN == mandoc_isdelim(sv))
! 528: p->flags |= TERMP_NOSPACE;
1.1 kristaps 529: }
530:
531:
532: static void
1.20 schwarze 533: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 534: {
535:
1.20 schwarze 536: if (0 == p->maxcols)
537: p->maxcols = 1024;
538: while (sz >= p->maxcols)
539: p->maxcols <<= 2;
540:
1.57 ! schwarze 541: p->buf = mandoc_realloc(p->buf, p->maxcols);
1.1 kristaps 542: }
543:
1.4 schwarze 544:
545: static void
1.20 schwarze 546: bufferc(struct termp *p, char c)
547: {
548:
549: if (p->col + 1 >= p->maxcols)
550: adjbuf(p, p->col + 1);
551:
552: p->buf[(int)p->col++] = c;
553: }
554:
555:
556: static void
557: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 558: {
1.20 schwarze 559: enum termfont f;
560: int i;
561:
562: /*
563: * Encode and buffer a string of characters. If the current
564: * font mode is unset, buffer directly, else encode then buffer
565: * character by character.
566: */
567:
1.38 schwarze 568: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.46 schwarze 569: if (p->col + sz >= p->maxcols)
570: adjbuf(p, p->col + sz);
571: memcpy(&p->buf[(int)p->col], word, sz);
572: p->col += sz;
1.20 schwarze 573: return;
574: }
575:
1.46 schwarze 576: /* Pre-buffer, assuming worst-case. */
577:
578: if (p->col + 1 + (sz * 3) >= p->maxcols)
579: adjbuf(p, p->col + 1 + (sz * 3));
580:
1.20 schwarze 581: for (i = 0; i < (int)sz; i++) {
582: if ( ! isgraph((u_char)word[i])) {
1.46 schwarze 583: p->buf[(int)p->col++] = word[i];
1.20 schwarze 584: continue;
1.4 schwarze 585: }
1.20 schwarze 586:
587: if (TERMFONT_UNDER == f)
1.46 schwarze 588: p->buf[(int)p->col++] = '_';
1.20 schwarze 589: else
1.46 schwarze 590: p->buf[(int)p->col++] = word[i];
1.20 schwarze 591:
1.46 schwarze 592: p->buf[(int)p->col++] = 8;
593: p->buf[(int)p->col++] = word[i];
1.4 schwarze 594: }
595: }
1.16 schwarze 596:
597:
598: size_t
1.39 schwarze 599: term_len(const struct termp *p, size_t sz)
600: {
601:
602: return((*p->width)(p, ' ') * sz);
603: }
604:
605:
606: size_t
607: term_strlen(const struct termp *p, const char *cp)
608: {
1.50 schwarze 609: size_t sz, ssz, rsz, i;
610: enum roffdeco d;
611: const char *seq, *rhs;
612:
613: for (sz = 0; '\0' != *cp; )
614: /*
615: * Account for escaped sequences within string length
616: * calculations. This follows the logic in term_word()
617: * as we must calculate the width of produced strings.
618: */
619: if ('\\' == *cp) {
620: seq = ++cp;
621: cp += a2roffdeco(&d, &seq, &ssz);
622:
623: switch (d) {
624: case (DECO_RESERVED):
625: rhs = chars_res2str
626: (p->symtab, seq, ssz, &rsz);
627: break;
628: case (DECO_SPECIAL):
629: /* FALLTHROUGH */
630: case (DECO_SSPECIAL):
631: rhs = chars_spec2str
632: (p->symtab, seq, ssz, &rsz);
633:
634: /* Allow for one-char escapes. */
635: if (DECO_SSPECIAL != d || rhs)
636: break;
637:
638: rhs = seq;
639: rsz = ssz;
640: break;
641: default:
642: rhs = NULL;
643: break;
644: }
1.39 schwarze 645:
1.50 schwarze 646: if (rhs)
647: for (i = 0; i < rsz; i++)
648: sz += (*p->width)(p, *rhs++);
1.55 schwarze 649: } else if (ASCII_NBRSP == *cp) {
650: sz += (*p->width)(p, ' ');
651: cp++;
652: } else if (ASCII_HYPH == *cp) {
653: sz += (*p->width)(p, '-');
654: cp++;
1.50 schwarze 655: } else
656: sz += (*p->width)(p, *cp++);
1.39 schwarze 657:
658: return(sz);
659: }
660:
661:
1.44 schwarze 662: /* ARGSUSED */
1.39 schwarze 663: size_t
664: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 665: {
666: double r;
667:
668: switch (su->unit) {
669: case (SCALE_CM):
670: r = su->scale * 2;
671: break;
672: case (SCALE_IN):
673: r = su->scale * 6;
674: break;
675: case (SCALE_PC):
676: r = su->scale;
677: break;
678: case (SCALE_PT):
679: r = su->scale / 8;
680: break;
681: case (SCALE_MM):
682: r = su->scale / 1000;
683: break;
684: case (SCALE_VS):
685: r = su->scale;
686: break;
687: default:
688: r = su->scale - 1;
689: break;
690: }
691:
692: if (r < 0.0)
693: r = 0.0;
694: return(/* LINTED */(size_t)
695: r);
696: }
697:
698:
699: size_t
1.39 schwarze 700: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 701: {
1.44 schwarze 702: double v;
1.16 schwarze 703:
1.44 schwarze 704: v = ((*p->hspan)(p, su));
705: if (v < 0.0)
706: v = 0.0;
707: return((size_t) /* LINTED */
708: v);
1.16 schwarze 709: }
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