Annotation of mandoc/term.c, Revision 1.123
1.123 ! kristaps 1: /* $Id: term.c,v 1.122 2009/11/05 08:40:16 kristaps 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: */
17: #include <assert.h>
1.122 kristaps 18: #include <ctype.h>
1.22 kristaps 19: #include <stdio.h>
1.1 kristaps 20: #include <stdlib.h>
21: #include <string.h>
1.113 kristaps 22: #include <time.h>
1.1 kristaps 23:
1.101 kristaps 24: #include "chars.h"
1.107 kristaps 25: #include "out.h"
1.71 kristaps 26: #include "term.h"
27: #include "man.h"
28: #include "mdoc.h"
1.105 kristaps 29: #include "main.h"
1.1 kristaps 30:
1.103 kristaps 31: /* FIXME: accomodate non-breaking, non-collapsing white-space. */
32: /* FIXME: accomodate non-breaking, collapsing white-space. */
33:
1.71 kristaps 34: static struct termp *term_alloc(enum termenc);
35: static void term_free(struct termp *);
1.95 kristaps 36:
37: static void do_escaped(struct termp *, const char **);
38: static void do_special(struct termp *,
1.71 kristaps 39: const char *, size_t);
1.95 kristaps 40: static void do_reserved(struct termp *,
1.94 kristaps 41: const char *, size_t);
1.95 kristaps 42: static void buffer(struct termp *, char);
43: static void encode(struct termp *, char);
1.1 kristaps 44:
45:
1.71 kristaps 46: void *
47: ascii_alloc(void)
1.10 kristaps 48: {
1.1 kristaps 49:
1.71 kristaps 50: return(term_alloc(TERMENC_ASCII));
1.1 kristaps 51: }
52:
53:
1.99 kristaps 54: void
1.71 kristaps 55: terminal_free(void *arg)
1.11 kristaps 56: {
57:
1.71 kristaps 58: term_free((struct termp *)arg);
1.11 kristaps 59: }
60:
61:
1.71 kristaps 62: static void
63: term_free(struct termp *p)
1.14 kristaps 64: {
65:
1.71 kristaps 66: if (p->buf)
67: free(p->buf);
1.102 kristaps 68: if (p->symtab)
1.101 kristaps 69: chars_free(p->symtab);
1.14 kristaps 70:
1.71 kristaps 71: free(p);
1.14 kristaps 72: }
73:
74:
1.71 kristaps 75: static struct termp *
76: term_alloc(enum termenc enc)
1.14 kristaps 77: {
1.71 kristaps 78: struct termp *p;
1.14 kristaps 79:
1.117 kristaps 80: p = calloc(1, sizeof(struct termp));
81: if (NULL == p) {
1.120 kristaps 82: perror(NULL);
1.117 kristaps 83: exit(EXIT_FAILURE);
84: }
1.80 kristaps 85: p->maxrmargin = 78;
1.71 kristaps 86: p->enc = enc;
87: return(p);
1.14 kristaps 88: }
89:
90:
1.71 kristaps 91: /*
92: * Flush a line of text. A "line" is loosely defined as being something
93: * that should be followed by a newline, regardless of whether it's
94: * broken apart by newlines getting there. A line can also be a
95: * fragment of a columnar list.
96: *
97: * Specifically, a line is whatever's in p->buf of length p->col, which
98: * is zeroed after this function returns.
99: *
1.84 kristaps 100: * The usage of termp:flags is as follows:
1.71 kristaps 101: *
102: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
103: * offset value. This is useful when doing columnar lists where the
104: * prior column has right-padded.
105: *
106: * - TERMP_NOBREAK: this is the most important and is used when making
107: * columns. In short: don't print a newline and instead pad to the
108: * right margin. Used in conjunction with TERMP_NOLPAD.
109: *
1.91 kristaps 110: * - TERMP_TWOSPACE: when padding, make sure there are at least two
111: * space characters of padding. Otherwise, rather break the line.
112: *
1.84 kristaps 113: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
114: * the line is overrun, and don't pad-right if it's underrun.
115: *
116: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
117: * overruning, instead save the position and continue at that point
118: * when the next invocation.
1.71 kristaps 119: *
120: * In-line line breaking:
121: *
122: * If TERMP_NOBREAK is specified and the line overruns the right
123: * margin, it will break and pad-right to the right margin after
124: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 125: * writing from the right-margin, which will lead to the above scenario
126: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 127: */
128: void
129: term_flushln(struct termp *p)
1.53 kristaps 130: {
1.114 kristaps 131: int i; /* current input position in p->buf */
132: size_t vis; /* current visual position on output */
133: size_t vbl; /* number of blanks to prepend to output */
134: size_t vsz; /* visual characters to write to output */
135: size_t bp; /* visual right border position */
136: int j; /* temporary loop index */
137: size_t maxvis, mmax;
1.91 kristaps 138: static int overstep = 0;
1.53 kristaps 139:
1.71 kristaps 140: /*
141: * First, establish the maximum columns of "visible" content.
142: * This is usually the difference between the right-margin and
143: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 144: * small set of values.
1.71 kristaps 145: */
1.53 kristaps 146:
1.71 kristaps 147: assert(p->offset < p->rmargin);
1.92 kristaps 148:
1.114 kristaps 149: maxvis = (int)(p->rmargin - p->offset) - overstep < 0 ?
1.119 kristaps 150: /* LINTED */
151: 0 : p->rmargin - p->offset - overstep;
1.114 kristaps 152: mmax = (int)(p->maxrmargin - p->offset) - overstep < 0 ?
1.119 kristaps 153: /* LINTED */
154: 0 : p->maxrmargin - p->offset - overstep;
1.92 kristaps 155:
1.71 kristaps 156: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 157:
158: /*
159: * FIXME: if bp is zero, we still output the first word before
160: * breaking the line.
161: */
162:
1.71 kristaps 163: vis = 0;
1.84 kristaps 164:
1.71 kristaps 165: /*
166: * If in the standard case (left-justified), then begin with our
167: * indentation, otherwise (columns, etc.) just start spitting
168: * out text.
169: */
1.53 kristaps 170:
1.71 kristaps 171: if ( ! (p->flags & TERMP_NOLPAD))
172: /* LINTED */
173: for (j = 0; j < (int)p->offset; j++)
174: putchar(' ');
175:
176: for (i = 0; i < (int)p->col; i++) {
177: /*
178: * Count up visible word characters. Control sequences
179: * (starting with the CSI) aren't counted. A space
180: * generates a non-printing word, which is valid (the
181: * space is printed according to regular spacing rules).
182: */
183:
184: /* LINTED */
185: for (j = i, vsz = 0; j < (int)p->col; j++) {
1.93 kristaps 186: if (j && ' ' == p->buf[j])
1.71 kristaps 187: break;
188: else if (8 == p->buf[j])
1.89 kristaps 189: vsz--;
1.71 kristaps 190: else
191: vsz++;
192: }
1.53 kristaps 193:
1.71 kristaps 194: /*
1.81 kristaps 195: * Choose the number of blanks to prepend: no blank at the
196: * beginning of a line, one between words -- but do not
197: * actually write them yet.
1.71 kristaps 198: */
1.81 kristaps 199: vbl = (size_t)(0 == vis ? 0 : 1);
1.71 kristaps 200:
1.81 kristaps 201: /*
202: * Find out whether we would exceed the right margin.
203: * If so, break to the next line. (TODO: hyphenate)
204: * Otherwise, write the chosen number of blanks now.
205: */
206: if (vis && vis + vbl + vsz > bp) {
207: putchar('\n');
208: if (TERMP_NOBREAK & p->flags) {
209: for (j = 0; j < (int)p->rmargin; j++)
210: putchar(' ');
211: vis = p->rmargin - p->offset;
212: } else {
1.71 kristaps 213: for (j = 0; j < (int)p->offset; j++)
214: putchar(' ');
215: vis = 0;
1.81 kristaps 216: }
1.104 kristaps 217: /* Remove the overstep width. */
1.112 kristaps 218: bp += (int)/* LINTED */
219: overstep;
1.110 kristaps 220: overstep = 0;
1.81 kristaps 221: } else {
222: for (j = 0; j < (int)vbl; j++)
1.71 kristaps 223: putchar(' ');
1.81 kristaps 224: vis += vbl;
1.71 kristaps 225: }
1.53 kristaps 226:
1.78 kristaps 227: /*
1.81 kristaps 228: * Finally, write out the word.
1.71 kristaps 229: */
230: for ( ; i < (int)p->col; i++) {
231: if (' ' == p->buf[i])
232: break;
1.121 kristaps 233:
234: /* The unit sep. is a non-breaking space. */
235: if (31 == p->buf[i])
236: putchar(' ');
237: else
238: putchar(p->buf[i]);
1.71 kristaps 239: }
240: vis += vsz;
241: }
1.111 kristaps 242:
1.91 kristaps 243: p->col = 0;
1.111 kristaps 244: overstep = 0;
1.15 kristaps 245:
1.91 kristaps 246: if ( ! (TERMP_NOBREAK & p->flags)) {
247: putchar('\n');
1.15 kristaps 248: return;
1.71 kristaps 249: }
1.15 kristaps 250:
1.91 kristaps 251: if (TERMP_HANG & p->flags) {
252: /* We need one blank after the tag. */
1.92 kristaps 253: overstep = /* LINTED */
254: vis - maxvis + 1;
1.91 kristaps 255:
256: /*
257: * Behave exactly the same way as groff:
1.92 kristaps 258: * If we have overstepped the margin, temporarily move
259: * it to the right and flag the rest of the line to be
260: * shorter.
1.91 kristaps 261: * If we landed right at the margin, be happy.
1.92 kristaps 262: * If we are one step before the margin, temporarily
263: * move it one step LEFT and flag the rest of the line
264: * to be longer.
1.91 kristaps 265: */
1.92 kristaps 266: if (overstep >= -1) {
267: assert((int)maxvis + overstep >= 0);
268: /* LINTED */
1.91 kristaps 269: maxvis += overstep;
1.92 kristaps 270: } else
1.91 kristaps 271: overstep = 0;
272:
273: } else if (TERMP_DANGLE & p->flags)
274: return;
1.15 kristaps 275:
1.92 kristaps 276: /* Right-pad. */
277: if (maxvis > vis + /* LINTED */
278: ((TERMP_TWOSPACE & p->flags) ? 1 : 0))
1.91 kristaps 279: for ( ; vis < maxvis; vis++)
280: putchar(' ');
1.92 kristaps 281: else { /* ...or newline break. */
1.71 kristaps 282: putchar('\n');
1.91 kristaps 283: for (i = 0; i < (int)p->rmargin; i++)
284: putchar(' ');
285: }
1.15 kristaps 286: }
287:
288:
1.71 kristaps 289: /*
290: * A newline only breaks an existing line; it won't assert vertical
291: * space. All data in the output buffer is flushed prior to the newline
292: * assertion.
293: */
294: void
295: term_newln(struct termp *p)
1.15 kristaps 296: {
297:
1.71 kristaps 298: p->flags |= TERMP_NOSPACE;
299: if (0 == p->col) {
300: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 301: return;
1.16 kristaps 302: }
1.71 kristaps 303: term_flushln(p);
304: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 305: }
306:
307:
1.71 kristaps 308: /*
309: * Asserts a vertical space (a full, empty line-break between lines).
310: * Note that if used twice, this will cause two blank spaces and so on.
311: * All data in the output buffer is flushed prior to the newline
312: * assertion.
313: */
314: void
315: term_vspace(struct termp *p)
1.16 kristaps 316: {
317:
1.62 kristaps 318: term_newln(p);
1.71 kristaps 319: putchar('\n');
1.16 kristaps 320: }
321:
322:
1.71 kristaps 323: static void
1.95 kristaps 324: do_special(struct termp *p, const char *word, size_t len)
1.17 kristaps 325: {
1.71 kristaps 326: const char *rhs;
327: size_t sz;
1.79 kristaps 328: int i;
1.17 kristaps 329:
1.101 kristaps 330: rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.86 kristaps 331:
1.96 kristaps 332: if (NULL == rhs) {
1.97 kristaps 333: #if 0
1.96 kristaps 334: fputs("Unknown special character: ", stderr);
335: for (i = 0; i < (int)len; i++)
336: fputc(word[i], stderr);
337: fputc('\n', stderr);
338: #endif
1.94 kristaps 339: return;
1.96 kristaps 340: }
1.94 kristaps 341: for (i = 0; i < (int)sz; i++)
1.95 kristaps 342: encode(p, rhs[i]);
1.94 kristaps 343: }
344:
345:
346: static void
1.95 kristaps 347: do_reserved(struct termp *p, const char *word, size_t len)
1.94 kristaps 348: {
349: const char *rhs;
350: size_t sz;
351: int i;
352:
1.101 kristaps 353: rhs = chars_a2res(p->symtab, word, len, &sz);
1.94 kristaps 354:
1.96 kristaps 355: if (NULL == rhs) {
356: #if 0
357: fputs("Unknown reserved word: ", stderr);
358: for (i = 0; i < (int)len; i++)
359: fputc(word[i], stderr);
360: fputc('\n', stderr);
361: #endif
1.94 kristaps 362: return;
1.96 kristaps 363: }
1.94 kristaps 364: for (i = 0; i < (int)sz; i++)
1.95 kristaps 365: encode(p, rhs[i]);
1.17 kristaps 366: }
367:
368:
1.71 kristaps 369: /*
370: * Handle an escape sequence: determine its length and pass it to the
371: * escape-symbol look table. Note that we assume mdoc(3) has validated
372: * the escape sequence (we assert upon badly-formed escape sequences).
373: */
374: static void
1.95 kristaps 375: do_escaped(struct termp *p, const char **word)
1.17 kristaps 376: {
1.123 ! kristaps 377: int j, type, sv, t, lim;
1.86 kristaps 378: const char *wp;
379:
380: wp = *word;
1.97 kristaps 381: type = 1;
1.17 kristaps 382:
1.123 ! kristaps 383: if ('\0' == *(++wp)) {
1.86 kristaps 384: *word = wp;
1.71 kristaps 385: return;
1.86 kristaps 386: }
1.17 kristaps 387:
1.86 kristaps 388: if ('(' == *wp) {
389: wp++;
1.123 ! kristaps 390: if ('\0' == *wp || '\0' == *(wp + 1)) {
! 391: *word = '\0' == *wp ? wp : wp + 1;
1.71 kristaps 392: return;
1.86 kristaps 393: }
1.22 kristaps 394:
1.95 kristaps 395: do_special(p, wp, 2);
1.86 kristaps 396: *word = ++wp;
1.71 kristaps 397: return;
1.22 kristaps 398:
1.86 kristaps 399: } else if ('*' == *wp) {
1.123 ! kristaps 400: if ('\0' == *(++wp)) {
1.86 kristaps 401: *word = wp;
1.71 kristaps 402: return;
1.86 kristaps 403: }
1.22 kristaps 404:
1.86 kristaps 405: switch (*wp) {
1.71 kristaps 406: case ('('):
1.86 kristaps 407: wp++;
1.123 ! kristaps 408: if ('\0' == *wp || '\0' == *(wp + 1)) {
! 409: *word = '\0' == *wp ? wp : wp + 1;
1.71 kristaps 410: return;
1.86 kristaps 411: }
1.65 kristaps 412:
1.95 kristaps 413: do_reserved(p, wp, 2);
1.86 kristaps 414: *word = ++wp;
1.71 kristaps 415: return;
416: case ('['):
1.97 kristaps 417: type = 0;
1.71 kristaps 418: break;
419: default:
1.95 kristaps 420: do_reserved(p, wp, 1);
1.86 kristaps 421: *word = wp;
1.71 kristaps 422: return;
423: }
1.123 ! kristaps 424:
! 425: } else if ('s' == *wp) {
! 426: /* This closely follows mandoc_special(). */
! 427: if ('\0' == *(++wp)) {
! 428: *word = wp;
! 429: return;
! 430: }
! 431:
! 432: t = 0;
! 433: lim = 1;
! 434:
! 435: if (*wp == '\'') {
! 436: lim = 0;
! 437: t = 1;
! 438: ++wp;
! 439: } else if (*wp == '[') {
! 440: lim = 0;
! 441: t = 2;
! 442: ++wp;
! 443: } else if (*wp == '(') {
! 444: lim = 2;
! 445: t = 3;
! 446: ++wp;
! 447: }
! 448:
! 449: if (*wp == '+' || *wp == '-')
! 450: ++wp;
! 451:
! 452: if (*wp == '\'') {
! 453: if (t) {
! 454: *word = wp;
! 455: return;
! 456: }
! 457: lim = 0;
! 458: t = 1;
! 459: ++wp;
! 460: } else if (*wp == '[') {
! 461: if (t) {
! 462: *word = wp;
! 463: return;
! 464: }
! 465: lim = 0;
! 466: t = 2;
! 467: ++wp;
! 468: } else if (*wp == '(') {
! 469: if (t) {
! 470: *word = wp;
! 471: return;
! 472: }
! 473: lim = 2;
! 474: t = 3;
! 475: ++wp;
! 476: }
! 477:
! 478: if ( ! isdigit((u_char)*wp)) {
! 479: *word = --wp;
! 480: return;
! 481: }
! 482:
! 483: for (j = 0; isdigit((u_char)*wp); j++) {
! 484: if (lim && j >= lim)
! 485: break;
! 486: ++wp;
! 487: }
! 488:
! 489: if (t && t < 3) {
! 490: if (1 == t && *wp != '\'') {
! 491: *word = --wp;
! 492: return;
! 493: }
! 494: if (2 == t && *wp != ']') {
! 495: *word = --wp;
! 496: return;
! 497: }
! 498: ++wp;
! 499: }
! 500: *word = --wp;
! 501: return;
! 502:
1.86 kristaps 503: } else if ('f' == *wp) {
1.123 ! kristaps 504: if ('\0' == *(++wp)) {
1.86 kristaps 505: *word = wp;
1.71 kristaps 506: return;
1.86 kristaps 507: }
508:
509: switch (*wp) {
1.122 kristaps 510: case ('3'):
511: /* FALLTHROUGH */
1.71 kristaps 512: case ('B'):
1.122 kristaps 513: p->metamask = p->metafont;
514: p->metafont |= METAF_BOLD;
1.71 kristaps 515: break;
1.122 kristaps 516: case ('2'):
517: /* FALLTHROUGH */
1.71 kristaps 518: case ('I'):
1.122 kristaps 519: p->metamask = p->metafont;
520: p->metafont |= METAF_UNDER;
1.71 kristaps 521: break;
522: case ('P'):
1.122 kristaps 523: sv = p->metamask;
524: p->metamask = p->metafont;
525: p->metafont = sv;
526: break;
527: case ('1'):
1.71 kristaps 528: /* FALLTHROUGH */
529: case ('R'):
1.122 kristaps 530: p->metamask = p->metafont;
531: p->metafont &= ~METAF_UNDER;
532: p->metafont &= ~METAF_BOLD;
1.71 kristaps 533: break;
534: default:
535: break;
536: }
1.86 kristaps 537:
538: *word = wp;
1.71 kristaps 539: return;
1.22 kristaps 540:
1.86 kristaps 541: } else if ('[' != *wp) {
1.95 kristaps 542: do_special(p, wp, 1);
1.86 kristaps 543: *word = wp;
1.71 kristaps 544: return;
545: }
1.28 kristaps 546:
1.86 kristaps 547: wp++;
548: for (j = 0; *wp && ']' != *wp; wp++, j++)
1.71 kristaps 549: /* Loop... */ ;
1.28 kristaps 550:
1.123 ! kristaps 551: if ('\0' == *wp) {
1.86 kristaps 552: *word = wp;
1.71 kristaps 553: return;
1.86 kristaps 554: }
1.48 kristaps 555:
1.97 kristaps 556: if (type)
557: do_special(p, wp - j, (size_t)j);
558: else
559: do_reserved(p, wp - j, (size_t)j);
1.86 kristaps 560: *word = wp;
1.48 kristaps 561: }
562:
563:
1.71 kristaps 564: /*
565: * Handle pwords, partial words, which may be either a single word or a
566: * phrase that cannot be broken down (such as a literal string). This
567: * handles word styling.
568: */
1.86 kristaps 569: void
570: term_word(struct termp *p, const char *word)
1.65 kristaps 571: {
1.88 kristaps 572: const char *sv;
1.71 kristaps 573:
1.100 kristaps 574: sv = word;
575:
1.123 ! kristaps 576: if (word[0] && '\0' == word[1])
1.100 kristaps 577: switch (word[0]) {
578: case('.'):
579: /* FALLTHROUGH */
580: case(','):
581: /* FALLTHROUGH */
582: case(';'):
583: /* FALLTHROUGH */
584: case(':'):
585: /* FALLTHROUGH */
586: case('?'):
587: /* FALLTHROUGH */
588: case('!'):
589: /* FALLTHROUGH */
590: case(')'):
591: /* FALLTHROUGH */
592: case(']'):
593: /* FALLTHROUGH */
594: case('}'):
595: if ( ! (TERMP_IGNDELIM & p->flags))
596: p->flags |= TERMP_NOSPACE;
597: break;
598: default:
599: break;
600: }
1.65 kristaps 601:
1.71 kristaps 602: if ( ! (TERMP_NOSPACE & p->flags))
1.95 kristaps 603: buffer(p, ' ');
1.65 kristaps 604:
1.71 kristaps 605: if ( ! (p->flags & TERMP_NONOSPACE))
606: p->flags &= ~TERMP_NOSPACE;
1.65 kristaps 607:
1.100 kristaps 608: for ( ; *word; word++)
1.86 kristaps 609: if ('\\' != *word)
1.95 kristaps 610: encode(p, *word);
1.79 kristaps 611: else
1.95 kristaps 612: do_escaped(p, &word);
1.65 kristaps 613:
1.100 kristaps 614: if (sv[0] && 0 == sv[1])
615: switch (sv[0]) {
616: case('('):
617: /* FALLTHROUGH */
618: case('['):
619: /* FALLTHROUGH */
620: case('{'):
621: p->flags |= TERMP_NOSPACE;
622: break;
623: default:
624: break;
625: }
1.65 kristaps 626: }
627:
628:
1.71 kristaps 629: /*
630: * Insert a single character into the line-buffer. If the buffer's
631: * space is exceeded, then allocate more space by doubling the buffer
632: * size.
633: */
634: static void
1.95 kristaps 635: buffer(struct termp *p, char c)
1.51 kristaps 636: {
1.71 kristaps 637: size_t s;
1.51 kristaps 638:
1.71 kristaps 639: if (p->col + 1 >= p->maxcols) {
640: if (0 == p->maxcols)
641: p->maxcols = 256;
642: s = p->maxcols * 2;
643: p->buf = realloc(p->buf, s);
1.118 kristaps 644: if (NULL == p->buf) {
1.120 kristaps 645: perror(NULL);
1.118 kristaps 646: exit(EXIT_FAILURE);
647: }
1.71 kristaps 648: p->maxcols = s;
649: }
650: p->buf[(int)(p->col)++] = c;
1.51 kristaps 651: }
652:
1.79 kristaps 653:
654: static void
1.95 kristaps 655: encode(struct termp *p, char c)
1.79 kristaps 656: {
1.89 kristaps 657:
1.122 kristaps 658: if (isgraph((u_char)c)) {
659: if (p->under || METAF_UNDER & p->metafont) {
1.109 kristaps 660: buffer(p, '_');
661: buffer(p, 8);
662: }
1.122 kristaps 663: if (p->bold || METAF_BOLD & p->metafont) {
1.95 kristaps 664: buffer(p, c);
665: buffer(p, 8);
1.79 kristaps 666: }
667: }
1.95 kristaps 668: buffer(p, c);
1.79 kristaps 669: }
1.106 kristaps 670:
671:
1.107 kristaps 672: size_t
673: term_vspan(const struct roffsu *su)
1.106 kristaps 674: {
675: double r;
676:
1.107 kristaps 677: switch (su->unit) {
1.106 kristaps 678: case (SCALE_CM):
1.107 kristaps 679: r = su->scale * 2;
1.106 kristaps 680: break;
681: case (SCALE_IN):
1.107 kristaps 682: r = su->scale * 6;
1.106 kristaps 683: break;
684: case (SCALE_PC):
1.107 kristaps 685: r = su->scale;
1.106 kristaps 686: break;
687: case (SCALE_PT):
1.107 kristaps 688: r = su->scale / 8;
1.106 kristaps 689: break;
690: case (SCALE_MM):
1.107 kristaps 691: r = su->scale / 1000;
1.106 kristaps 692: break;
693: case (SCALE_VS):
1.107 kristaps 694: r = su->scale;
1.106 kristaps 695: break;
696: default:
1.107 kristaps 697: r = su->scale - 1;
1.106 kristaps 698: break;
699: }
700:
701: if (r < 0.0)
702: r = 0.0;
1.107 kristaps 703: return(/* LINTED */(size_t)
1.106 kristaps 704: r);
705: }
706:
707:
1.107 kristaps 708: size_t
709: term_hspan(const struct roffsu *su)
1.106 kristaps 710: {
711: double r;
712:
1.108 kristaps 713: /* XXX: CM, IN, and PT are approximations. */
714:
1.107 kristaps 715: switch (su->unit) {
1.106 kristaps 716: case (SCALE_CM):
1.108 kristaps 717: r = 4 * su->scale;
1.106 kristaps 718: break;
719: case (SCALE_IN):
1.108 kristaps 720: /* XXX: this is an approximation. */
721: r = 10 * su->scale;
1.106 kristaps 722: break;
723: case (SCALE_PC):
1.108 kristaps 724: r = (10 * su->scale) / 6;
1.106 kristaps 725: break;
726: case (SCALE_PT):
1.108 kristaps 727: r = (10 * su->scale) / 72;
1.106 kristaps 728: break;
729: case (SCALE_MM):
1.107 kristaps 730: r = su->scale / 1000; /* FIXME: double-check. */
1.106 kristaps 731: break;
732: case (SCALE_VS):
1.107 kristaps 733: r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106 kristaps 734: break;
735: default:
1.107 kristaps 736: r = su->scale;
1.106 kristaps 737: break;
738: }
739:
740: if (r < 0.0)
741: r = 0.0;
1.107 kristaps 742: return((size_t)/* LINTED */
1.106 kristaps 743: r);
744: }
745:
746:
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