Annotation of mandoc/term.c, Revision 1.122
1.122 ! kristaps 1: /* $Id: term.c,v 1.121 2009/11/05 07:21:02 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: {
1.122 ! kristaps 377: int j, type, sv;
1.86 kristaps 378: const char *wp;
379:
380: wp = *word;
1.97 kristaps 381: type = 1;
1.17 kristaps 382:
1.86 kristaps 383: if (0 == *(++wp)) {
384: *word = wp;
1.71 kristaps 385: return;
1.86 kristaps 386: }
1.17 kristaps 387:
1.86 kristaps 388: if ('(' == *wp) {
389: wp++;
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) {
400: if (0 == *(++wp)) {
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++;
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: }
424:
1.86 kristaps 425: } else if ('f' == *wp) {
426: if (0 == *(++wp)) {
427: *word = wp;
1.71 kristaps 428: return;
1.86 kristaps 429: }
430:
431: switch (*wp) {
1.122 ! kristaps 432: case ('3'):
! 433: /* FALLTHROUGH */
1.71 kristaps 434: case ('B'):
1.122 ! kristaps 435: p->metamask = p->metafont;
! 436: p->metafont |= METAF_BOLD;
1.71 kristaps 437: break;
1.122 ! kristaps 438: case ('2'):
! 439: /* FALLTHROUGH */
1.71 kristaps 440: case ('I'):
1.122 ! kristaps 441: p->metamask = p->metafont;
! 442: p->metafont |= METAF_UNDER;
1.71 kristaps 443: break;
444: case ('P'):
1.122 ! kristaps 445: sv = p->metamask;
! 446: p->metamask = p->metafont;
! 447: p->metafont = sv;
! 448: break;
! 449: case ('1'):
1.71 kristaps 450: /* FALLTHROUGH */
451: case ('R'):
1.122 ! kristaps 452: p->metamask = p->metafont;
! 453: p->metafont &= ~METAF_UNDER;
! 454: p->metafont &= ~METAF_BOLD;
1.71 kristaps 455: break;
456: default:
457: break;
458: }
1.86 kristaps 459:
460: *word = wp;
1.71 kristaps 461: return;
1.22 kristaps 462:
1.86 kristaps 463: } else if ('[' != *wp) {
1.95 kristaps 464: do_special(p, wp, 1);
1.86 kristaps 465: *word = wp;
1.71 kristaps 466: return;
467: }
1.28 kristaps 468:
1.86 kristaps 469: wp++;
470: for (j = 0; *wp && ']' != *wp; wp++, j++)
1.71 kristaps 471: /* Loop... */ ;
1.28 kristaps 472:
1.86 kristaps 473: if (0 == *wp) {
474: *word = wp;
1.71 kristaps 475: return;
1.86 kristaps 476: }
1.48 kristaps 477:
1.97 kristaps 478: if (type)
479: do_special(p, wp - j, (size_t)j);
480: else
481: do_reserved(p, wp - j, (size_t)j);
1.86 kristaps 482: *word = wp;
1.48 kristaps 483: }
484:
485:
1.71 kristaps 486: /*
487: * Handle pwords, partial words, which may be either a single word or a
488: * phrase that cannot be broken down (such as a literal string). This
489: * handles word styling.
490: */
1.86 kristaps 491: void
492: term_word(struct termp *p, const char *word)
1.65 kristaps 493: {
1.88 kristaps 494: const char *sv;
1.71 kristaps 495:
1.100 kristaps 496: sv = word;
497:
498: if (word[0] && 0 == word[1])
499: switch (word[0]) {
500: case('.'):
501: /* FALLTHROUGH */
502: case(','):
503: /* FALLTHROUGH */
504: case(';'):
505: /* FALLTHROUGH */
506: case(':'):
507: /* FALLTHROUGH */
508: case('?'):
509: /* FALLTHROUGH */
510: case('!'):
511: /* FALLTHROUGH */
512: case(')'):
513: /* FALLTHROUGH */
514: case(']'):
515: /* FALLTHROUGH */
516: case('}'):
517: if ( ! (TERMP_IGNDELIM & p->flags))
518: p->flags |= TERMP_NOSPACE;
519: break;
520: default:
521: break;
522: }
1.65 kristaps 523:
1.71 kristaps 524: if ( ! (TERMP_NOSPACE & p->flags))
1.95 kristaps 525: buffer(p, ' ');
1.65 kristaps 526:
1.71 kristaps 527: if ( ! (p->flags & TERMP_NONOSPACE))
528: p->flags &= ~TERMP_NOSPACE;
1.65 kristaps 529:
1.100 kristaps 530: for ( ; *word; word++)
1.86 kristaps 531: if ('\\' != *word)
1.95 kristaps 532: encode(p, *word);
1.79 kristaps 533: else
1.95 kristaps 534: do_escaped(p, &word);
1.65 kristaps 535:
1.100 kristaps 536: if (sv[0] && 0 == sv[1])
537: switch (sv[0]) {
538: case('('):
539: /* FALLTHROUGH */
540: case('['):
541: /* FALLTHROUGH */
542: case('{'):
543: p->flags |= TERMP_NOSPACE;
544: break;
545: default:
546: break;
547: }
1.65 kristaps 548: }
549:
550:
1.71 kristaps 551: /*
552: * Insert a single character into the line-buffer. If the buffer's
553: * space is exceeded, then allocate more space by doubling the buffer
554: * size.
555: */
556: static void
1.95 kristaps 557: buffer(struct termp *p, char c)
1.51 kristaps 558: {
1.71 kristaps 559: size_t s;
1.51 kristaps 560:
1.71 kristaps 561: if (p->col + 1 >= p->maxcols) {
562: if (0 == p->maxcols)
563: p->maxcols = 256;
564: s = p->maxcols * 2;
565: p->buf = realloc(p->buf, s);
1.118 kristaps 566: if (NULL == p->buf) {
1.120 kristaps 567: perror(NULL);
1.118 kristaps 568: exit(EXIT_FAILURE);
569: }
1.71 kristaps 570: p->maxcols = s;
571: }
572: p->buf[(int)(p->col)++] = c;
1.51 kristaps 573: }
574:
1.79 kristaps 575:
576: static void
1.95 kristaps 577: encode(struct termp *p, char c)
1.79 kristaps 578: {
1.89 kristaps 579:
1.122 ! kristaps 580: if (isgraph((u_char)c)) {
! 581: if (p->under || METAF_UNDER & p->metafont) {
1.109 kristaps 582: buffer(p, '_');
583: buffer(p, 8);
584: }
1.122 ! kristaps 585: if (p->bold || METAF_BOLD & p->metafont) {
1.95 kristaps 586: buffer(p, c);
587: buffer(p, 8);
1.79 kristaps 588: }
589: }
1.95 kristaps 590: buffer(p, c);
1.79 kristaps 591: }
1.106 kristaps 592:
593:
1.107 kristaps 594: size_t
595: term_vspan(const struct roffsu *su)
1.106 kristaps 596: {
597: double r;
598:
1.107 kristaps 599: switch (su->unit) {
1.106 kristaps 600: case (SCALE_CM):
1.107 kristaps 601: r = su->scale * 2;
1.106 kristaps 602: break;
603: case (SCALE_IN):
1.107 kristaps 604: r = su->scale * 6;
1.106 kristaps 605: break;
606: case (SCALE_PC):
1.107 kristaps 607: r = su->scale;
1.106 kristaps 608: break;
609: case (SCALE_PT):
1.107 kristaps 610: r = su->scale / 8;
1.106 kristaps 611: break;
612: case (SCALE_MM):
1.107 kristaps 613: r = su->scale / 1000;
1.106 kristaps 614: break;
615: case (SCALE_VS):
1.107 kristaps 616: r = su->scale;
1.106 kristaps 617: break;
618: default:
1.107 kristaps 619: r = su->scale - 1;
1.106 kristaps 620: break;
621: }
622:
623: if (r < 0.0)
624: r = 0.0;
1.107 kristaps 625: return(/* LINTED */(size_t)
1.106 kristaps 626: r);
627: }
628:
629:
1.107 kristaps 630: size_t
631: term_hspan(const struct roffsu *su)
1.106 kristaps 632: {
633: double r;
634:
1.108 kristaps 635: /* XXX: CM, IN, and PT are approximations. */
636:
1.107 kristaps 637: switch (su->unit) {
1.106 kristaps 638: case (SCALE_CM):
1.108 kristaps 639: r = 4 * su->scale;
1.106 kristaps 640: break;
641: case (SCALE_IN):
1.108 kristaps 642: /* XXX: this is an approximation. */
643: r = 10 * su->scale;
1.106 kristaps 644: break;
645: case (SCALE_PC):
1.108 kristaps 646: r = (10 * su->scale) / 6;
1.106 kristaps 647: break;
648: case (SCALE_PT):
1.108 kristaps 649: r = (10 * su->scale) / 72;
1.106 kristaps 650: break;
651: case (SCALE_MM):
1.107 kristaps 652: r = su->scale / 1000; /* FIXME: double-check. */
1.106 kristaps 653: break;
654: case (SCALE_VS):
1.107 kristaps 655: r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106 kristaps 656: break;
657: default:
1.107 kristaps 658: r = su->scale;
1.106 kristaps 659: break;
660: }
661:
662: if (r < 0.0)
663: r = 0.0;
1.107 kristaps 664: return((size_t)/* LINTED */
1.106 kristaps 665: r);
666: }
667:
668:
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