term.c

   1 /*      $Id: term.c,v 1.204 2012/07/10 15:35:41 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010, 2011, 2012 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  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.
  17  */
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21
  22 #include <sys/types.h>
  23
  24 #include <assert.h>
  25 #include <ctype.h>
  26 #include <stdint.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include "mandoc.h"
  32 #include "out.h"
  33 #include "term.h"
  34 #include "main.h"
  35
  36 static  size_t           cond_width(const struct termp *, int, int *);
  37 static  void             adjbuf(struct termp *p, int);
  38 static  void             bufferc(struct termp *, char);
  39 static  void             encode(struct termp *, const char *, size_t);
  40 static  void             encode1(struct termp *, int);
  41
  42 void
  43 term_free(struct termp *p)
  44 {
  45
  46         if (p->buf)
  47                 free(p->buf);
  48         if (p->symtab)
  49                 mchars_free(p->symtab);
  50
  51         free(p);
  52 }
  53
  54
  55 void
  56 term_begin(struct termp *p, term_margin head,
  57                 term_margin foot, const void *arg)
  58 {
  59
  60         p->headf = head;
  61         p->footf = foot;
  62         p->argf = arg;
  63         (*p->begin)(p);
  64 }
  65
  66
  67 void
  68 term_end(struct termp *p)
  69 {
  70
  71         (*p->end)(p);
  72 }
  73
  74 /*
  75  * Flush a line of text.  A "line" is loosely defined as being something
  76  * that should be followed by a newline, regardless of whether it's
  77  * broken apart by newlines getting there.  A line can also be a
  78  * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
  79  * not have a trailing newline.
  80  *
  81  * The following flags may be specified:
  82  *
  83  *  - TERMP_NOBREAK: this is the most important and is used when making
  84  *    columns.  In short: don't print a newline and instead expect the
  85  *    next call to do the padding up to the start of the next column.
  86  *
  87  *  - TERMP_TWOSPACE: make sure there is room for at least two space
  88  *    characters of padding.  Otherwise, rather break the line.
  89  *
  90  *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
  91  *    the line is overrun, and don't pad-right if it's underrun.
  92  *
  93  *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
  94  *    overrunning, instead save the position and continue at that point
  95  *    when the next invocation.
  96  *
  97  *  In-line line breaking:
  98  *
  99  *  If TERMP_NOBREAK is specified and the line overruns the right
 100  *  margin, it will break and pad-right to the right margin after
 101  *  writing.  If maxrmargin is violated, it will break and continue
 102  *  writing from the right-margin, which will lead to the above scenario
 103  *  upon exit.  Otherwise, the line will break at the right margin.
 104  */
 105 void
 106 term_flushln(struct termp *p)
 107 {
 108         int              i;     /* current input position in p->buf */
 109         size_t           vis;   /* current visual position on output */
 110         size_t           vbl;   /* number of blanks to prepend to output */
 111         size_t           vend;  /* end of word visual position on output */
 112         size_t           bp;    /* visual right border position */
 113         size_t           dv;    /* temporary for visual pos calculations */
 114         int              j;     /* temporary loop index for p->buf */
 115         int              jhy;   /* last hyph before overflow w/r/t j */
 116         size_t           maxvis; /* output position of visible boundary */
 117         size_t           mmax; /* used in calculating bp */
 118
 119         /*
 120          * First, establish the maximum columns of "visible" content.
 121          * This is usually the difference between the right-margin and
 122          * an indentation, but can be, for tagged lists or columns, a
 123          * small set of values.
 124          */
 125         assert  (p->rmargin >= p->offset);
 126         dv     = p->rmargin - p->offset;
 127         maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
 128         dv     = p->maxrmargin - p->offset;
 129         mmax   = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
 130
 131         bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
 132
 133         /*
 134          * Calculate the required amount of padding.
 135          */
 136         vbl = p->offset + p->overstep > p->viscol ?
 137               p->offset + p->overstep - p->viscol : 0;
 138
 139         vis = vend = 0;
 140         i = 0;
 141
 142         while (i < p->col) {
 143                 /*
 144                  * Handle literal tab characters: collapse all
 145                  * subsequent tabs into a single huge set of spaces.
 146                  */
 147                 while (i < p->col && '\t' == p->buf[i]) {
 148                         vend = (vis / p->tabwidth + 1) * p->tabwidth;
 149                         vbl += vend - vis;
 150                         vis = vend;
 151                         i++;
 152                 }
 153
 154                 /*
 155                  * Count up visible word characters.  Control sequences
 156                  * (starting with the CSI) aren't counted.  A space
 157                  * generates a non-printing word, which is valid (the
 158                  * space is printed according to regular spacing rules).
 159                  */
 160
 161                 for (j = i, jhy = 0; j < p->col; j++) {
 162                         if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
 163                                 break;
 164
 165                         /* Back over the the last printed character. */
 166                         if (8 == p->buf[j]) {
 167                                 assert(j);
 168                                 vend -= (*p->width)(p, p->buf[j - 1]);
 169                                 continue;
 170                         }
 171
 172                         /* Regular word. */
 173                         /* Break at the hyphen point if we overrun. */
 174                         if (vend > vis && vend < bp &&
 175                                         ASCII_HYPH == p->buf[j])
 176                                 jhy = j;
 177
 178                         vend += (*p->width)(p, p->buf[j]);
 179                 }
 180
 181                 /*
 182                  * Find out whether we would exceed the right margin.
 183                  * If so, break to the next line.
 184                  */
 185                 if (vend > bp && 0 == jhy && vis > 0) {
 186                         vend -= vis;
 187                         (*p->endline)(p);
 188                         p->viscol = 0;
 189                         if (TERMP_NOBREAK & p->flags) {
 190                                 vbl = p->rmargin;
 191                                 vend += p->rmargin - p->offset;
 192                         } else
 193                                 vbl = p->offset;
 194
 195                         /* Remove the p->overstep width. */
 196
 197                         bp += (size_t)p->overstep;
 198                         p->overstep = 0;
 199                 }
 200
 201                 /* Write out the [remaining] word. */
 202                 for ( ; i < p->col; i++) {
 203                         if (vend > bp && jhy > 0 && i > jhy)
 204                                 break;
 205                         if ('\t' == p->buf[i])
 206                                 break;
 207                         if (' ' == p->buf[i]) {
 208                                 j = i;
 209                                 while (' ' == p->buf[i])
 210                                         i++;
 211                                 dv = (size_t)(i - j) * (*p->width)(p, ' ');
 212                                 vbl += dv;
 213                                 vend += dv;
 214                                 break;
 215                         }
 216                         if (ASCII_NBRSP == p->buf[i]) {
 217                                 vbl += (*p->width)(p, ' ');
 218                                 continue;
 219                         }
 220
 221                         /*
 222                          * Now we definitely know there will be
 223                          * printable characters to output,
 224                          * so write preceding white space now.
 225                          */
 226                         if (vbl) {
 227                                 (*p->advance)(p, vbl);
 228                                 p->viscol += vbl;
 229                                 vbl = 0;
 230                         }
 231
 232                         if (ASCII_HYPH == p->buf[i]) {
 233                                 (*p->letter)(p, '-');
 234                                 p->viscol += (*p->width)(p, '-');
 235                                 continue;
 236                         }
 237
 238                         (*p->letter)(p, p->buf[i]);
 239                         if (8 == p->buf[i])
 240                                 p->viscol -= (*p->width)(p, p->buf[i-1]);
 241                         else
 242                                 p->viscol += (*p->width)(p, p->buf[i]);
 243                 }
 244                 vis = vend;
 245         }
 246
 247         /*
 248          * If there was trailing white space, it was not printed;
 249          * so reset the cursor position accordingly.
 250          */
 251         if (vis)
 252                 vis -= vbl;
 253
 254         p->col = 0;
 255         p->overstep = 0;
 256
 257         if ( ! (TERMP_NOBREAK & p->flags)) {
 258                 p->viscol = 0;
 259                 (*p->endline)(p);
 260                 return;
 261         }
 262
 263         if (TERMP_HANG & p->flags) {
 264                 /* We need one blank after the tag. */
 265                 p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
 266
 267                 /*
 268                  * If we have overstepped the margin, temporarily move
 269                  * it to the right and flag the rest of the line to be
 270                  * shorter.
 271                  */
 272                 if (p->overstep < 0)
 273                         p->overstep = 0;
 274                 return;
 275
 276         } else if (TERMP_DANGLE & p->flags)
 277                 return;
 278
 279         /* If the column was overrun, break the line. */
 280         if (maxvis <= vis +
 281             ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
 282                 (*p->endline)(p);
 283                 p->viscol = 0;
 284         }
 285 }
 286
 287
 288 /*
 289  * A newline only breaks an existing line; it won't assert vertical
 290  * space.  All data in the output buffer is flushed prior to the newline
 291  * assertion.
 292  */
 293 void
 294 term_newln(struct termp *p)
 295 {
 296
 297         p->flags |= TERMP_NOSPACE;
 298         if (p->col || p->viscol)
 299                 term_flushln(p);
 300 }
 301
 302
 303 /*
 304  * Asserts a vertical space (a full, empty line-break between lines).
 305  * Note that if used twice, this will cause two blank spaces and so on.
 306  * All data in the output buffer is flushed prior to the newline
 307  * assertion.
 308  */
 309 void
 310 term_vspace(struct termp *p)
 311 {
 312
 313         term_newln(p);
 314         p->viscol = 0;
 315         if (0 < p->skipvsp)
 316                 p->skipvsp--;
 317         else
 318                 (*p->endline)(p);
 319 }
 320
 321 void
 322 term_fontlast(struct termp *p)
 323 {
 324         enum termfont    f;
 325
 326         f = p->fontl;
 327         p->fontl = p->fontq[p->fonti];
 328         p->fontq[p->fonti] = f;
 329 }
 330
 331
 332 void
 333 term_fontrepl(struct termp *p, enum termfont f)
 334 {
 335
 336         p->fontl = p->fontq[p->fonti];
 337         p->fontq[p->fonti] = f;
 338 }
 339
 340
 341 void
 342 term_fontpush(struct termp *p, enum termfont f)
 343 {
 344
 345         assert(p->fonti + 1 < 10);
 346         p->fontl = p->fontq[p->fonti];
 347         p->fontq[++p->fonti] = f;
 348 }
 349
 350
 351 const void *
 352 term_fontq(struct termp *p)
 353 {
 354
 355         return(&p->fontq[p->fonti]);
 356 }
 357
 358
 359 enum termfont
 360 term_fonttop(struct termp *p)
 361 {
 362
 363         return(p->fontq[p->fonti]);
 364 }
 365
 366
 367 void
 368 term_fontpopq(struct termp *p, const void *key)
 369 {
 370
 371         while (p->fonti >= 0 && key != &p->fontq[p->fonti])
 372                 p->fonti--;
 373         assert(p->fonti >= 0);
 374 }
 375
 376
 377 void
 378 term_fontpop(struct termp *p)
 379 {
 380
 381         assert(p->fonti);
 382         p->fonti--;
 383 }
 384
 385 /*
 386  * Handle pwords, partial words, which may be either a single word or a
 387  * phrase that cannot be broken down (such as a literal string).  This
 388  * handles word styling.
 389  */
 390 void
 391 term_word(struct termp *p, const char *word)
 392 {
 393         const char      *seq, *cp;
 394         char             c;
 395         int              sz, uc;
 396         size_t           ssz;
 397         enum mandoc_esc  esc;
 398
 399         if ( ! (TERMP_NOSPACE & p->flags)) {
 400                 if ( ! (TERMP_KEEP & p->flags)) {
 401                         if (TERMP_PREKEEP & p->flags)
 402                                 p->flags |= TERMP_KEEP;
 403                         bufferc(p, ' ');
 404                         if (TERMP_SENTENCE & p->flags)
 405                                 bufferc(p, ' ');
 406                 } else
 407                         bufferc(p, ASCII_NBRSP);
 408         }
 409
 410         if ( ! (p->flags & TERMP_NONOSPACE))
 411                 p->flags &= ~TERMP_NOSPACE;
 412         else
 413                 p->flags |= TERMP_NOSPACE;
 414
 415         p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
 416
 417         while ('\0' != *word) {
 418                 if ('\\' != *word) {
 419                         if (TERMP_SKIPCHAR & p->flags) {
 420                                 p->flags &= ~TERMP_SKIPCHAR;
 421                                 word++;
 422                                 continue;
 423                         }
 424                         ssz = strcspn(word, "\\");
 425                         encode(p, word, ssz);
 426                         word += (int)ssz;
 427                         continue;
 428                 }
 429
 430                 word++;
 431                 esc = mandoc_escape(&word, &seq, &sz);
 432                 if (ESCAPE_ERROR == esc)
 433                         break;
 434
 435                 if (TERMENC_ASCII != p->enc)
 436                         switch (esc) {
 437                         case (ESCAPE_UNICODE):
 438                                 uc = mchars_num2uc(seq + 1, sz - 1);
 439                                 if ('\0' == uc)
 440                                         break;
 441                                 encode1(p, uc);
 442                                 continue;
 443                         case (ESCAPE_SPECIAL):
 444                                 uc = mchars_spec2cp(p->symtab, seq, sz);
 445                                 if (uc <= 0)
 446                                         break;
 447                                 encode1(p, uc);
 448                                 continue;
 449                         default:
 450                                 break;
 451                         }
 452
 453                 switch (esc) {
 454                 case (ESCAPE_UNICODE):
 455                         encode1(p, '?');
 456                         break;
 457                 case (ESCAPE_NUMBERED):
 458                         c = mchars_num2char(seq, sz);
 459                         if ('\0' != c)
 460                                 encode(p, &c, 1);
 461                         break;
 462                 case (ESCAPE_SPECIAL):
 463                         cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
 464                         if (NULL != cp)
 465                                 encode(p, cp, ssz);
 466                         else if (1 == ssz)
 467                                 encode(p, seq, sz);
 468                         break;
 469                 case (ESCAPE_FONTBOLD):
 470                         term_fontrepl(p, TERMFONT_BOLD);
 471                         break;
 472                 case (ESCAPE_FONTITALIC):
 473                         term_fontrepl(p, TERMFONT_UNDER);
 474                         break;
 475                 case (ESCAPE_FONT):
 476                         /* FALLTHROUGH */
 477                 case (ESCAPE_FONTROMAN):
 478                         term_fontrepl(p, TERMFONT_NONE);
 479                         break;
 480                 case (ESCAPE_FONTPREV):
 481                         term_fontlast(p);
 482                         break;
 483                 case (ESCAPE_NOSPACE):
 484                         if (TERMP_SKIPCHAR & p->flags)
 485                                 p->flags &= ~TERMP_SKIPCHAR;
 486                         else if ('\0' == *word)
 487                                 p->flags |= TERMP_NOSPACE;
 488                         break;
 489                 case (ESCAPE_SKIPCHAR):
 490                         p->flags |= TERMP_SKIPCHAR;
 491                         break;
 492                 default:
 493                         break;
 494                 }
 495         }
 496 }
 497
 498 static void
 499 adjbuf(struct termp *p, int sz)
 500 {
 501
 502         if (0 == p->maxcols)
 503                 p->maxcols = 1024;
 504         while (sz >= p->maxcols)
 505                 p->maxcols <<= 2;
 506
 507         p->buf = mandoc_realloc
 508                 (p->buf, sizeof(int) * (size_t)p->maxcols);
 509 }
 510
 511 static void
 512 bufferc(struct termp *p, char c)
 513 {
 514
 515         if (p->col + 1 >= p->maxcols)
 516                 adjbuf(p, p->col + 1);
 517
 518         p->buf[p->col++] = c;
 519 }
 520
 521 /*
 522  * See encode().
 523  * Do this for a single (probably unicode) value.
 524  * Does not check for non-decorated glyphs.
 525  */
 526 static void
 527 encode1(struct termp *p, int c)
 528 {
 529         enum termfont     f;
 530
 531         if (TERMP_SKIPCHAR & p->flags) {
 532                 p->flags &= ~TERMP_SKIPCHAR;
 533                 return;
 534         }
 535
 536         if (p->col + 4 >= p->maxcols)
 537                 adjbuf(p, p->col + 4);
 538
 539         f = term_fonttop(p);
 540
 541         if (TERMFONT_NONE == f) {
 542                 p->buf[p->col++] = c;
 543                 return;
 544         } else if (TERMFONT_UNDER == f) {
 545                 p->buf[p->col++] = '_';
 546         } else
 547                 p->buf[p->col++] = c;
 548
 549         p->buf[p->col++] = 8;
 550         p->buf[p->col++] = c;
 551 }
 552
 553 static void
 554 encode(struct termp *p, const char *word, size_t sz)
 555 {
 556         enum termfont     f;
 557         int               i, len;
 558
 559         if (TERMP_SKIPCHAR & p->flags) {
 560                 p->flags &= ~TERMP_SKIPCHAR;
 561                 return;
 562         }
 563
 564         /* LINTED */
 565         len = sz;
 566
 567         /*
 568          * Encode and buffer a string of characters.  If the current
 569          * font mode is unset, buffer directly, else encode then buffer
 570          * character by character.
 571          */
 572
 573         if (TERMFONT_NONE == (f = term_fonttop(p))) {
 574                 if (p->col + len >= p->maxcols)
 575                         adjbuf(p, p->col + len);
 576                 for (i = 0; i < len; i++)
 577                         p->buf[p->col++] = word[i];
 578                 return;
 579         }
 580
 581         /* Pre-buffer, assuming worst-case. */
 582
 583         if (p->col + 1 + (len * 3) >= p->maxcols)
 584                 adjbuf(p, p->col + 1 + (len * 3));
 585
 586         for (i = 0; i < len; i++) {
 587                 if (ASCII_HYPH != word[i] &&
 588                     ! isgraph((unsigned char)word[i])) {
 589                         p->buf[p->col++] = word[i];
 590                         continue;
 591                 }
 592
 593                 if (TERMFONT_UNDER == f)
 594                         p->buf[p->col++] = '_';
 595                 else if (ASCII_HYPH == word[i])
 596                         p->buf[p->col++] = '-';
 597                 else
 598                         p->buf[p->col++] = word[i];
 599
 600                 p->buf[p->col++] = 8;
 601                 p->buf[p->col++] = word[i];
 602         }
 603 }
 604
 605 size_t
 606 term_len(const struct termp *p, size_t sz)
 607 {
 608
 609         return((*p->width)(p, ' ') * sz);
 610 }
 611
 612 static size_t
 613 cond_width(const struct termp *p, int c, int *skip)
 614 {
 615
 616         if (*skip) {
 617                 (*skip) = 0;
 618                 return(0);
 619         } else
 620                 return((*p->width)(p, c));
 621 }
 622
 623 size_t
 624 term_strlen(const struct termp *p, const char *cp)
 625 {
 626         size_t           sz, rsz, i;
 627         int              ssz, skip, c;
 628         const char      *seq, *rhs;
 629         enum mandoc_esc  esc;
 630         static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
 631
 632         /*
 633          * Account for escaped sequences within string length
 634          * calculations.  This follows the logic in term_word() as we
 635          * must calculate the width of produced strings.
 636          */
 637
 638         sz = 0;
 639         skip = 0;
 640         while ('\0' != *cp) {
 641                 rsz = strcspn(cp, rej);
 642                 for (i = 0; i < rsz; i++)
 643                         sz += cond_width(p, *cp++, &skip);
 644
 645                 c = 0;
 646                 switch (*cp) {
 647                 case ('\\'):
 648                         cp++;
 649                         esc = mandoc_escape(&cp, &seq, &ssz);
 650                         if (ESCAPE_ERROR == esc)
 651                                 return(sz);
 652
 653                         if (TERMENC_ASCII != p->enc)
 654                                 switch (esc) {
 655                                 case (ESCAPE_UNICODE):
 656                                         c = mchars_num2uc
 657                                                 (seq + 1, ssz - 1);
 658                                         if ('\0' == c)
 659                                                 break;
 660                                         sz += cond_width(p, c, &skip);
 661                                         continue;
 662                                 case (ESCAPE_SPECIAL):
 663                                         c = mchars_spec2cp
 664                                                 (p->symtab, seq, ssz);
 665                                         if (c <= 0)
 666                                                 break;
 667                                         sz += cond_width(p, c, &skip);
 668                                         continue;
 669                                 default:
 670                                         break;
 671                                 }
 672
 673                         rhs = NULL;
 674
 675                         switch (esc) {
 676                         case (ESCAPE_UNICODE):
 677                                 sz += cond_width(p, '?', &skip);
 678                                 break;
 679                         case (ESCAPE_NUMBERED):
 680                                 c = mchars_num2char(seq, ssz);
 681                                 if ('\0' != c)
 682                                         sz += cond_width(p, c, &skip);
 683                                 break;
 684                         case (ESCAPE_SPECIAL):
 685                                 rhs = mchars_spec2str
 686                                         (p->symtab, seq, ssz, &rsz);
 687
 688                                 if (ssz != 1 || rhs)
 689                                         break;
 690
 691                                 rhs = seq;
 692                                 rsz = ssz;
 693                                 break;
 694                         case (ESCAPE_SKIPCHAR):
 695                                 skip = 1;
 696                                 break;
 697                         default:
 698                                 break;
 699                         }
 700
 701                         if (NULL == rhs)
 702                                 break;
 703
 704                         if (skip) {
 705                                 skip = 0;
 706                                 break;
 707                         }
 708
 709                         for (i = 0; i < rsz; i++)
 710                                 sz += (*p->width)(p, *rhs++);
 711                         break;
 712                 case (ASCII_NBRSP):
 713                         sz += cond_width(p, ' ', &skip);
 714                         cp++;
 715                         break;
 716                 case (ASCII_HYPH):
 717                         sz += cond_width(p, '-', &skip);
 718                         cp++;
 719                         break;
 720                 default:
 721                         break;
 722                 }
 723         }
 724
 725         return(sz);
 726 }
 727
 728 /* ARGSUSED */
 729 size_t
 730 term_vspan(const struct termp *p, const struct roffsu *su)
 731 {
 732         double           r;
 733
 734         switch (su->unit) {
 735         case (SCALE_CM):
 736                 r = su->scale * 2;
 737                 break;
 738         case (SCALE_IN):
 739                 r = su->scale * 6;
 740                 break;
 741         case (SCALE_PC):
 742                 r = su->scale;
 743                 break;
 744         case (SCALE_PT):
 745                 r = su->scale / 8;
 746                 break;
 747         case (SCALE_MM):
 748                 r = su->scale / 1000;
 749                 break;
 750         case (SCALE_VS):
 751                 r = su->scale;
 752                 break;
 753         default:
 754                 r = su->scale - 1;
 755                 break;
 756         }
 757
 758         if (r < 0.0)
 759                 r = 0.0;
 760         return(/* LINTED */(size_t)
 761                         r);
 762 }
 763
 764 size_t
 765 term_hspan(const struct termp *p, const struct roffsu *su)
 766 {
 767         double           v;
 768
 769         v = ((*p->hspan)(p, su));
 770         if (v < 0.0)
 771                 v = 0.0;
 772         return((size_t) /* LINTED */
 773                         v);
 774 }