Annotation of src/usr.bin/mandoc/term.c, Revision 1.39
1.39 ! schwarze 1: /* $Id: term.c,v 1.38 2010/06/26 17:56:43 schwarze Exp $ */
1.1 kristaps 2: /*
1.38 schwarze 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
1.1 kristaps 4: *
5: * Permission to use, copy, modify, and distribute this software for any
1.2 schwarze 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: *
1.2 schwarze 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: */
1.20 schwarze 17: #include <sys/types.h>
18:
1.1 kristaps 19: #include <assert.h>
1.20 schwarze 20: #include <ctype.h>
1.36 schwarze 21: #include <stdint.h>
1.1 kristaps 22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25:
1.34 schwarze 26: #include "mandoc.h"
1.15 schwarze 27: #include "chars.h"
1.16 schwarze 28: #include "out.h"
1.1 kristaps 29: #include "term.h"
30: #include "man.h"
31: #include "mdoc.h"
1.16 schwarze 32: #include "main.h"
1.1 kristaps 33:
1.20 schwarze 34: static void spec(struct termp *, const char *, size_t);
35: static void res(struct termp *, const char *, size_t);
36: static void buffera(struct termp *, const char *, size_t);
37: static void bufferc(struct termp *, char);
38: static void adjbuf(struct termp *p, size_t);
39: static void encode(struct termp *, const char *, size_t);
1.1 kristaps 40:
41:
1.37 schwarze 42: void
43: term_free(struct termp *p)
1.1 kristaps 44: {
45:
1.37 schwarze 46: if (p->buf)
47: free(p->buf);
48: if (p->symtab)
49: chars_free(p->symtab);
50:
51: free(p);
1.1 kristaps 52: }
53:
54:
1.13 schwarze 55: void
1.37 schwarze 56: term_begin(struct termp *p, term_margin head,
57: term_margin foot, const void *arg)
1.1 kristaps 58: {
59:
1.37 schwarze 60: p->headf = head;
61: p->footf = foot;
62: p->argf = arg;
63: (*p->begin)(p);
1.1 kristaps 64: }
65:
66:
1.37 schwarze 67: void
68: term_end(struct termp *p)
1.1 kristaps 69: {
70:
1.37 schwarze 71: (*p->end)(p);
1.1 kristaps 72: }
73:
74:
1.37 schwarze 75: struct termp *
76: term_alloc(enum termenc enc)
1.1 kristaps 77: {
1.36 schwarze 78: struct termp *p;
1.1 kristaps 79:
1.19 schwarze 80: p = calloc(1, sizeof(struct termp));
81: if (NULL == p) {
82: perror(NULL);
83: exit(EXIT_FAILURE);
84: }
1.36 schwarze 85:
1.1 kristaps 86: p->enc = enc;
87: return(p);
88: }
89:
90:
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
1.27 schwarze 95: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
96: * not have a trailing newline.
1.1 kristaps 97: *
1.27 schwarze 98: * The following flags may be specified:
1.1 kristaps 99: *
100: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
101: * offset value. This is useful when doing columnar lists where the
102: * prior column has right-padded.
103: *
104: * - TERMP_NOBREAK: this is the most important and is used when making
105: * columns. In short: don't print a newline and instead pad to the
106: * right margin. Used in conjunction with TERMP_NOLPAD.
107: *
1.9 schwarze 108: * - TERMP_TWOSPACE: when padding, make sure there are at least two
109: * space characters of padding. Otherwise, rather break the line.
110: *
1.6 schwarze 111: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
112: * the line is overrun, and don't pad-right if it's underrun.
113: *
114: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
115: * overruning, instead save the position and continue at that point
116: * when the next invocation.
1.1 kristaps 117: *
118: * In-line line breaking:
119: *
120: * If TERMP_NOBREAK is specified and the line overruns the right
121: * margin, it will break and pad-right to the right margin after
122: * writing. If maxrmargin is violated, it will break and continue
1.19 schwarze 123: * writing from the right-margin, which will lead to the above scenario
124: * upon exit. Otherwise, the line will break at the right margin.
1.1 kristaps 125: */
126: void
127: term_flushln(struct termp *p)
128: {
1.19 schwarze 129: int i; /* current input position in p->buf */
130: size_t vis; /* current visual position on output */
131: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 132: size_t vend; /* end of word visual position on output */
1.19 schwarze 133: size_t bp; /* visual right border position */
134: int j; /* temporary loop index */
1.22 schwarze 135: int jhy; /* last hyphen before line overflow */
1.19 schwarze 136: size_t maxvis, mmax;
1.1 kristaps 137:
138: /*
139: * First, establish the maximum columns of "visible" content.
140: * This is usually the difference between the right-margin and
141: * an indentation, but can be, for tagged lists or columns, a
1.19 schwarze 142: * small set of values.
1.1 kristaps 143: */
144:
145: assert(p->offset < p->rmargin);
1.9 schwarze 146:
1.26 schwarze 147: maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.19 schwarze 148: /* LINTED */
1.26 schwarze 149: 0 : p->rmargin - p->offset - p->overstep;
150: mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.19 schwarze 151: /* LINTED */
1.26 schwarze 152: 0 : p->maxrmargin - p->offset - p->overstep;
1.9 schwarze 153:
1.1 kristaps 154: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.19 schwarze 155:
1.33 schwarze 156: /*
157: * Indent the first line of a paragraph.
158: */
159: vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
160:
1.19 schwarze 161: /*
162: * FIXME: if bp is zero, we still output the first word before
163: * breaking the line.
164: */
165:
1.33 schwarze 166: vis = vend = i = 0;
1.22 schwarze 167: while (i < (int)p->col) {
168:
169: /*
1.30 schwarze 170: * Handle literal tab characters.
171: */
172: for (j = i; j < (int)p->col; j++) {
173: if ('\t' != p->buf[j])
174: break;
1.33 schwarze 175: vend = (vis/p->tabwidth+1)*p->tabwidth;
1.30 schwarze 176: vbl += vend - vis;
177: vis = vend;
178: }
1.22 schwarze 179:
1.1 kristaps 180: /*
181: * Count up visible word characters. Control sequences
182: * (starting with the CSI) aren't counted. A space
183: * generates a non-printing word, which is valid (the
184: * space is printed according to regular spacing rules).
185: */
186:
187: /* LINTED */
1.30 schwarze 188: for (jhy = 0; j < (int)p->col; j++) {
189: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.1 kristaps 190: break;
1.35 schwarze 191: if (8 != p->buf[j]) {
1.22 schwarze 192: if (vend > vis && vend < bp &&
1.35 schwarze 193: ASCII_HYPH == p->buf[j])
1.22 schwarze 194: jhy = j;
195: vend++;
1.35 schwarze 196: } else
197: vend--;
1.1 kristaps 198: }
199:
200: /*
1.5 schwarze 201: * Find out whether we would exceed the right margin.
1.33 schwarze 202: * If so, break to the next line.
1.5 schwarze 203: */
1.33 schwarze 204: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 205: vend -= vis;
1.37 schwarze 206: (*p->endline)(p);
1.5 schwarze 207: if (TERMP_NOBREAK & p->flags) {
1.29 schwarze 208: p->viscol = p->rmargin;
1.37 schwarze 209: (*p->advance)(p, p->rmargin);
1.22 schwarze 210: vend += p->rmargin - p->offset;
1.5 schwarze 211: } else {
1.33 schwarze 212: p->viscol = 0;
213: vbl = p->offset;
1.5 schwarze 214: }
1.33 schwarze 215:
1.26 schwarze 216: /* Remove the p->overstep width. */
1.33 schwarze 217:
1.18 schwarze 218: bp += (int)/* LINTED */
1.26 schwarze 219: p->overstep;
220: p->overstep = 0;
1.1 kristaps 221: }
222:
1.3 schwarze 223: /*
1.30 schwarze 224: * Skip leading tabs, they were handled above.
225: */
226: while (i < (int)p->col && '\t' == p->buf[i])
227: i++;
228:
1.33 schwarze 229: /* Write out the [remaining] word. */
1.1 kristaps 230: for ( ; i < (int)p->col; i++) {
1.25 schwarze 231: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 232: break;
233: if ('\t' == p->buf[i])
1.1 kristaps 234: break;
1.22 schwarze 235: if (' ' == p->buf[i]) {
1.33 schwarze 236: while (' ' == p->buf[i]) {
237: vbl++;
238: i++;
239: }
1.22 schwarze 240: break;
241: }
1.33 schwarze 242: if (ASCII_NBRSP == p->buf[i]) {
243: vbl++;
244: continue;
245: }
246:
247: /*
248: * Now we definitely know there will be
249: * printable characters to output,
250: * so write preceding white space now.
251: */
252: if (vbl) {
1.37 schwarze 253: (*p->advance)(p, vbl);
1.33 schwarze 254: p->viscol += vbl;
255: vbl = 0;
256: }
1.35 schwarze 257:
258: if (ASCII_HYPH == p->buf[i])
1.37 schwarze 259: (*p->letter)(p, '-');
1.35 schwarze 260: else
1.37 schwarze 261: (*p->letter)(p, p->buf[i]);
1.35 schwarze 262:
1.33 schwarze 263: p->viscol += 1;
1.1 kristaps 264: }
1.33 schwarze 265: vend += vbl;
1.22 schwarze 266: vis = vend;
1.1 kristaps 267: }
1.18 schwarze 268:
1.9 schwarze 269: p->col = 0;
1.26 schwarze 270: p->overstep = 0;
1.1 kristaps 271:
1.9 schwarze 272: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 273: p->viscol = 0;
1.37 schwarze 274: (*p->endline)(p);
1.1 kristaps 275: return;
276: }
277:
1.9 schwarze 278: if (TERMP_HANG & p->flags) {
279: /* We need one blank after the tag. */
1.26 schwarze 280: p->overstep = /* LINTED */
1.9 schwarze 281: vis - maxvis + 1;
282:
283: /*
284: * Behave exactly the same way as groff:
285: * If we have overstepped the margin, temporarily move
286: * it to the right and flag the rest of the line to be
287: * shorter.
288: * If we landed right at the margin, be happy.
289: * If we are one step before the margin, temporarily
290: * move it one step LEFT and flag the rest of the line
291: * to be longer.
292: */
1.26 schwarze 293: if (p->overstep >= -1) {
294: assert((int)maxvis + p->overstep >= 0);
1.9 schwarze 295: /* LINTED */
1.26 schwarze 296: maxvis += p->overstep;
1.9 schwarze 297: } else
1.26 schwarze 298: p->overstep = 0;
1.9 schwarze 299:
300: } else if (TERMP_DANGLE & p->flags)
301: return;
1.1 kristaps 302:
1.9 schwarze 303: /* Right-pad. */
304: if (maxvis > vis + /* LINTED */
1.29 schwarze 305: ((TERMP_TWOSPACE & p->flags) ? 1 : 0)) {
306: p->viscol += maxvis - vis;
1.37 schwarze 307: (*p->advance)(p, maxvis - vis);
308: vis += (maxvis - vis);
1.29 schwarze 309: } else { /* ...or newline break. */
1.37 schwarze 310: (*p->endline)(p);
1.29 schwarze 311: p->viscol = p->rmargin;
1.37 schwarze 312: (*p->advance)(p, p->rmargin);
1.9 schwarze 313: }
1.1 kristaps 314: }
315:
316:
317: /*
318: * A newline only breaks an existing line; it won't assert vertical
319: * space. All data in the output buffer is flushed prior to the newline
320: * assertion.
321: */
322: void
323: term_newln(struct termp *p)
324: {
325:
326: p->flags |= TERMP_NOSPACE;
1.29 schwarze 327: if (0 == p->col && 0 == p->viscol) {
1.1 kristaps 328: p->flags &= ~TERMP_NOLPAD;
329: return;
330: }
331: term_flushln(p);
332: p->flags &= ~TERMP_NOLPAD;
333: }
334:
335:
336: /*
337: * Asserts a vertical space (a full, empty line-break between lines).
338: * Note that if used twice, this will cause two blank spaces and so on.
339: * All data in the output buffer is flushed prior to the newline
340: * assertion.
341: */
342: void
343: term_vspace(struct termp *p)
344: {
345:
346: term_newln(p);
1.29 schwarze 347: p->viscol = 0;
1.37 schwarze 348: (*p->endline)(p);
1.1 kristaps 349: }
350:
351:
352: static void
1.20 schwarze 353: spec(struct termp *p, const char *word, size_t len)
1.1 kristaps 354: {
355: const char *rhs;
356: size_t sz;
357:
1.15 schwarze 358: rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.20 schwarze 359: if (rhs)
360: encode(p, rhs, sz);
1.11 schwarze 361: }
362:
363:
364: static void
1.20 schwarze 365: res(struct termp *p, const char *word, size_t len)
1.11 schwarze 366: {
367: const char *rhs;
368: size_t sz;
369:
1.15 schwarze 370: rhs = chars_a2res(p->symtab, word, len, &sz);
1.20 schwarze 371: if (rhs)
372: encode(p, rhs, sz);
373: }
374:
375:
376: void
377: term_fontlast(struct termp *p)
378: {
379: enum termfont f;
1.11 schwarze 380:
1.20 schwarze 381: f = p->fontl;
382: p->fontl = p->fontq[p->fonti];
383: p->fontq[p->fonti] = f;
384: }
385:
386:
387: void
388: term_fontrepl(struct termp *p, enum termfont f)
389: {
390:
391: p->fontl = p->fontq[p->fonti];
392: p->fontq[p->fonti] = f;
1.1 kristaps 393: }
394:
395:
1.20 schwarze 396: void
397: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 398: {
1.7 schwarze 399:
1.20 schwarze 400: assert(p->fonti + 1 < 10);
401: p->fontl = p->fontq[p->fonti];
402: p->fontq[++p->fonti] = f;
403: }
1.1 kristaps 404:
405:
1.20 schwarze 406: const void *
407: term_fontq(struct termp *p)
408: {
1.1 kristaps 409:
1.20 schwarze 410: return(&p->fontq[p->fonti]);
411: }
1.1 kristaps 412:
413:
1.20 schwarze 414: enum termfont
415: term_fonttop(struct termp *p)
416: {
1.1 kristaps 417:
1.20 schwarze 418: return(p->fontq[p->fonti]);
419: }
1.7 schwarze 420:
421:
1.20 schwarze 422: void
423: term_fontpopq(struct termp *p, const void *key)
424: {
1.1 kristaps 425:
1.20 schwarze 426: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
427: p->fonti--;
428: assert(p->fonti >= 0);
429: }
1.1 kristaps 430:
431:
1.20 schwarze 432: void
433: term_fontpop(struct termp *p)
434: {
1.1 kristaps 435:
1.20 schwarze 436: assert(p->fonti);
437: p->fonti--;
1.1 kristaps 438: }
439:
440:
441: /*
442: * Handle pwords, partial words, which may be either a single word or a
443: * phrase that cannot be broken down (such as a literal string). This
444: * handles word styling.
445: */
1.7 schwarze 446: void
447: term_word(struct termp *p, const char *word)
1.1 kristaps 448: {
1.20 schwarze 449: const char *sv, *seq;
450: int sz;
451: size_t ssz;
452: enum roffdeco deco;
1.1 kristaps 453:
1.14 schwarze 454: sv = word;
455:
1.20 schwarze 456: if (word[0] && '\0' == word[1])
1.14 schwarze 457: switch (word[0]) {
458: case('.'):
459: /* FALLTHROUGH */
460: case(','):
461: /* FALLTHROUGH */
462: case(';'):
463: /* FALLTHROUGH */
464: case(':'):
465: /* FALLTHROUGH */
466: case('?'):
467: /* FALLTHROUGH */
468: case('!'):
469: /* FALLTHROUGH */
470: case(')'):
471: /* FALLTHROUGH */
472: case(']'):
473: if ( ! (TERMP_IGNDELIM & p->flags))
474: p->flags |= TERMP_NOSPACE;
475: break;
476: default:
477: break;
478: }
1.1 kristaps 479:
1.31 schwarze 480: if ( ! (TERMP_NOSPACE & p->flags)) {
1.20 schwarze 481: bufferc(p, ' ');
1.31 schwarze 482: if (TERMP_SENTENCE & p->flags)
483: bufferc(p, ' ');
484: }
1.1 kristaps 485:
486: if ( ! (p->flags & TERMP_NONOSPACE))
487: p->flags &= ~TERMP_NOSPACE;
488:
1.31 schwarze 489: p->flags &= ~TERMP_SENTENCE;
490:
1.20 schwarze 491: /* FIXME: use strcspn. */
492:
493: while (*word) {
494: if ('\\' != *word) {
495: encode(p, word, 1);
496: word++;
497: continue;
498: }
499:
500: seq = ++word;
501: sz = a2roffdeco(&deco, &seq, &ssz);
502:
503: switch (deco) {
504: case (DECO_RESERVED):
505: res(p, seq, ssz);
506: break;
507: case (DECO_SPECIAL):
508: spec(p, seq, ssz);
509: break;
510: case (DECO_BOLD):
511: term_fontrepl(p, TERMFONT_BOLD);
512: break;
513: case (DECO_ITALIC):
514: term_fontrepl(p, TERMFONT_UNDER);
515: break;
516: case (DECO_ROMAN):
517: term_fontrepl(p, TERMFONT_NONE);
518: break;
519: case (DECO_PREVIOUS):
520: term_fontlast(p);
521: break;
522: default:
523: break;
524: }
525:
526: word += sz;
527: if (DECO_NOSPACE == deco && '\0' == *word)
528: p->flags |= TERMP_NOSPACE;
529: }
1.1 kristaps 530:
1.31 schwarze 531: /*
532: * Note that we don't process the pipe: the parser sees it as
533: * punctuation, but we don't in terms of typography.
534: */
1.14 schwarze 535: if (sv[0] && 0 == sv[1])
536: switch (sv[0]) {
537: case('('):
538: /* FALLTHROUGH */
539: case('['):
540: p->flags |= TERMP_NOSPACE;
541: break;
542: default:
543: break;
544: }
1.1 kristaps 545: }
546:
547:
548: static void
1.20 schwarze 549: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 550: {
551:
1.20 schwarze 552: if (0 == p->maxcols)
553: p->maxcols = 1024;
554: while (sz >= p->maxcols)
555: p->maxcols <<= 2;
556:
557: p->buf = realloc(p->buf, p->maxcols);
558: if (NULL == p->buf) {
559: perror(NULL);
560: exit(EXIT_FAILURE);
1.1 kristaps 561: }
562: }
563:
1.4 schwarze 564:
565: static void
1.20 schwarze 566: buffera(struct termp *p, const char *word, size_t sz)
567: {
568:
569: if (p->col + sz >= p->maxcols)
570: adjbuf(p, p->col + sz);
571:
572: memcpy(&p->buf[(int)p->col], word, sz);
573: p->col += sz;
574: }
575:
576:
577: static void
578: bufferc(struct termp *p, char c)
579: {
580:
581: if (p->col + 1 >= p->maxcols)
582: adjbuf(p, p->col + 1);
583:
584: p->buf[(int)p->col++] = c;
585: }
586:
587:
588: static void
589: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 590: {
1.20 schwarze 591: enum termfont f;
592: int i;
593:
594: /*
595: * Encode and buffer a string of characters. If the current
596: * font mode is unset, buffer directly, else encode then buffer
597: * character by character.
598: */
599:
1.38 schwarze 600: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.20 schwarze 601: buffera(p, word, sz);
602: return;
603: }
604:
605: for (i = 0; i < (int)sz; i++) {
606: if ( ! isgraph((u_char)word[i])) {
607: bufferc(p, word[i]);
608: continue;
1.4 schwarze 609: }
1.20 schwarze 610:
611: if (TERMFONT_UNDER == f)
612: bufferc(p, '_');
613: else
614: bufferc(p, word[i]);
615:
616: bufferc(p, 8);
617: bufferc(p, word[i]);
1.4 schwarze 618: }
619: }
1.16 schwarze 620:
621:
622: size_t
1.39 ! schwarze 623: term_len(const struct termp *p, size_t sz)
! 624: {
! 625:
! 626: return((*p->width)(p, ' ') * sz);
! 627: }
! 628:
! 629:
! 630: size_t
! 631: term_strlen(const struct termp *p, const char *cp)
! 632: {
! 633: size_t sz;
! 634:
! 635: for (sz = 0; *cp; cp++)
! 636: sz += (*p->width)(p, *cp);
! 637:
! 638: return(sz);
! 639: }
! 640:
! 641:
! 642: size_t
! 643: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 644: {
645: double r;
646:
647: switch (su->unit) {
648: case (SCALE_CM):
649: r = su->scale * 2;
650: break;
651: case (SCALE_IN):
652: r = su->scale * 6;
653: break;
654: case (SCALE_PC):
655: r = su->scale;
656: break;
657: case (SCALE_PT):
658: r = su->scale / 8;
659: break;
660: case (SCALE_MM):
661: r = su->scale / 1000;
662: break;
663: case (SCALE_VS):
664: r = su->scale;
665: break;
666: default:
667: r = su->scale - 1;
668: break;
669: }
670:
671: if (r < 0.0)
672: r = 0.0;
673: return(/* LINTED */(size_t)
674: r);
675: }
676:
677:
678: size_t
1.39 ! schwarze 679: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 680: {
681: double r;
682:
683: /* XXX: CM, IN, and PT are approximations. */
684:
685: switch (su->unit) {
686: case (SCALE_CM):
687: r = 4 * su->scale;
688: break;
689: case (SCALE_IN):
690: /* XXX: this is an approximation. */
691: r = 10 * su->scale;
692: break;
693: case (SCALE_PC):
694: r = (10 * su->scale) / 6;
695: break;
696: case (SCALE_PT):
697: r = (10 * su->scale) / 72;
698: break;
699: case (SCALE_MM):
700: r = su->scale / 1000; /* FIXME: double-check. */
701: break;
702: case (SCALE_VS):
703: r = su->scale * 2 - 1; /* FIXME: double-check. */
704: break;
705: default:
706: r = su->scale;
707: break;
708: }
709:
710: if (r < 0.0)
711: r = 0.0;
712: return((size_t)/* LINTED */
713: r);
714: }
715:
716:
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