out.c

   1 /*      $Id: out.c,v 1.37 2011/01/30 16:05:37 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2011 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 <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <time.h>
  30
  31 #include "mandoc.h"
  32 #include "out.h"
  33
  34 static  void    tblcalc_data(struct rofftbl *, struct roffcol *,
  35                         const struct tbl *, const struct tbl_dat *);
  36 static  void    tblcalc_literal(struct rofftbl *, struct roffcol *,
  37                         const struct tbl_dat *);
  38 static  void    tblcalc_number(struct rofftbl *, struct roffcol *,
  39                         const struct tbl *, const struct tbl_dat *);
  40
  41 /*
  42  * Convert a `scaling unit' to a consistent form, or fail.  Scaling
  43  * units are documented in groff.7, mdoc.7, man.7.
  44  */
  45 int
  46 a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
  47 {
  48         char             buf[BUFSIZ], hasd;
  49         int              i;
  50         enum roffscale   unit;
  51
  52         if ('\0' == *src)
  53                 return(0);
  54
  55         i = hasd = 0;
  56
  57         switch (*src) {
  58         case ('+'):
  59                 src++;
  60                 break;
  61         case ('-'):
  62                 buf[i++] = *src++;
  63                 break;
  64         default:
  65                 break;
  66         }
  67
  68         if ('\0' == *src)
  69                 return(0);
  70
  71         while (i < BUFSIZ) {
  72                 if ( ! isdigit((u_char)*src)) {
  73                         if ('.' != *src)
  74                                 break;
  75                         else if (hasd)
  76                                 break;
  77                         else
  78                                 hasd = 1;
  79                 }
  80                 buf[i++] = *src++;
  81         }
  82
  83         if (BUFSIZ == i || (*src && *(src + 1)))
  84                 return(0);
  85
  86         buf[i] = '\0';
  87
  88         switch (*src) {
  89         case ('c'):
  90                 unit = SCALE_CM;
  91                 break;
  92         case ('i'):
  93                 unit = SCALE_IN;
  94                 break;
  95         case ('P'):
  96                 unit = SCALE_PC;
  97                 break;
  98         case ('p'):
  99                 unit = SCALE_PT;
 100                 break;
 101         case ('f'):
 102                 unit = SCALE_FS;
 103                 break;
 104         case ('v'):
 105                 unit = SCALE_VS;
 106                 break;
 107         case ('m'):
 108                 unit = SCALE_EM;
 109                 break;
 110         case ('\0'):
 111                 if (SCALE_MAX == def)
 112                         return(0);
 113                 unit = SCALE_BU;
 114                 break;
 115         case ('u'):
 116                 unit = SCALE_BU;
 117                 break;
 118         case ('M'):
 119                 unit = SCALE_MM;
 120                 break;
 121         case ('n'):
 122                 unit = SCALE_EN;
 123                 break;
 124         default:
 125                 return(0);
 126         }
 127
 128         /* FIXME: do this in the caller. */
 129         if ((dst->scale = atof(buf)) < 0)
 130                 dst->scale = 0;
 131         dst->unit = unit;
 132         return(1);
 133 }
 134
 135
 136 /*
 137  * Correctly writes the time in nroff form, which differs from standard
 138  * form in that a space isn't printed in lieu of the extra %e field for
 139  * single-digit dates.
 140  */
 141 void
 142 time2a(time_t t, char *dst, size_t sz)
 143 {
 144         struct tm        tm;
 145         char             buf[5];
 146         char            *p;
 147         size_t           nsz;
 148
 149         assert(sz > 1);
 150         localtime_r(&t, &tm);
 151
 152         p = dst;
 153         nsz = 0;
 154
 155         dst[0] = '\0';
 156
 157         if (0 == (nsz = strftime(p, sz, "%B ", &tm)))
 158                 return;
 159
 160         p += (int)nsz;
 161         sz -= nsz;
 162
 163         if (0 == strftime(buf, sizeof(buf), "%e, ", &tm))
 164                 return;
 165
 166         nsz = strlcat(p, buf + (' ' == buf[0] ? 1 : 0), sz);
 167
 168         if (nsz >= sz)
 169                 return;
 170
 171         p += (int)nsz;
 172         sz -= nsz;
 173
 174         (void)strftime(p, sz, "%Y", &tm);
 175 }
 176
 177
 178 int
 179 a2roffdeco(enum roffdeco *d, const char **word, size_t *sz)
 180 {
 181         int              i, j, lim;
 182         char             term, c;
 183         const char      *wp;
 184         enum roffdeco    dd;
 185
 186         *d = DECO_NONE;
 187         lim = i = 0;
 188         term = '\0';
 189         wp = *word;
 190
 191         switch ((c = wp[i++])) {
 192         case ('('):
 193                 *d = DECO_SPECIAL;
 194                 lim = 2;
 195                 break;
 196         case ('F'):
 197                 /* FALLTHROUGH */
 198         case ('f'):
 199                 *d = 'F' == c ? DECO_FFONT : DECO_FONT;
 200
 201                 switch (wp[i++]) {
 202                 case ('('):
 203                         lim = 2;
 204                         break;
 205                 case ('['):
 206                         term = ']';
 207                         break;
 208                 case ('3'):
 209                         /* FALLTHROUGH */
 210                 case ('B'):
 211                         *d = DECO_BOLD;
 212                         return(i);
 213                 case ('2'):
 214                         /* FALLTHROUGH */
 215                 case ('I'):
 216                         *d = DECO_ITALIC;
 217                         return(i);
 218                 case ('P'):
 219                         *d = DECO_PREVIOUS;
 220                         return(i);
 221                 case ('1'):
 222                         /* FALLTHROUGH */
 223                 case ('R'):
 224                         *d = DECO_ROMAN;
 225                         return(i);
 226                 default:
 227                         i--;
 228                         lim = 1;
 229                         break;
 230                 }
 231                 break;
 232         case ('k'):
 233                 /* FALLTHROUGH */
 234         case ('M'):
 235                 /* FALLTHROUGH */
 236         case ('m'):
 237                 /* FALLTHROUGH */
 238         case ('*'):
 239                 if ('*' == c)
 240                         *d = DECO_RESERVED;
 241
 242                 switch (wp[i++]) {
 243                 case ('('):
 244                         lim = 2;
 245                         break;
 246                 case ('['):
 247                         term = ']';
 248                         break;
 249                 default:
 250                         i--;
 251                         lim = 1;
 252                         break;
 253                 }
 254                 break;
 255
 256         case ('N'):
 257
 258                 /*
 259                  * Sequence of characters:  backslash,  'N' (i = 0),
 260                  * starting delimiter (i = 1), character number (i = 2).
 261                  */
 262
 263                 *word = wp + 2;
 264                 *sz = 0;
 265
 266                 /*
 267                  * Cannot use a digit as a starting delimiter;
 268                  * but skip the digit anyway.
 269                  */
 270
 271                 if (isdigit((int)wp[1]))
 272                         return(2);
 273
 274                 /*
 275                  * Any non-digit terminates the character number.
 276                  * That is, the terminating delimiter need not
 277                  * match the starting delimiter.
 278                  */
 279
 280                 for (i = 2; isdigit((int)wp[i]); i++)
 281                         (*sz)++;
 282
 283                 /*
 284                  * This is only a numbered character
 285                  * if the character number has at least one digit.
 286                  */
 287
 288                 if (*sz)
 289                         *d = DECO_NUMBERED;
 290
 291                 /*
 292                  * Skip the terminating delimiter, even if it does not
 293                  * match, and even if there is no character number.
 294                  */
 295
 296                 return(++i);
 297
 298         case ('h'):
 299                 /* FALLTHROUGH */
 300         case ('v'):
 301                 /* FALLTHROUGH */
 302         case ('s'):
 303                 j = 0;
 304                 if ('+' == wp[i] || '-' == wp[i]) {
 305                         i++;
 306                         j = 1;
 307                 }
 308
 309                 switch (wp[i++]) {
 310                 case ('('):
 311                         lim = 2;
 312                         break;
 313                 case ('['):
 314                         term = ']';
 315                         break;
 316                 case ('\''):
 317                         term = '\'';
 318                         break;
 319                 case ('0'):
 320                         j = 1;
 321                         /* FALLTHROUGH */
 322                 default:
 323                         i--;
 324                         lim = 1;
 325                         break;
 326                 }
 327
 328                 if ('+' == wp[i] || '-' == wp[i]) {
 329                         if (j)
 330                                 return(i);
 331                         i++;
 332                 }
 333
 334                 /* Handle embedded numerical subexp or escape. */
 335
 336                 if ('(' == wp[i]) {
 337                         while (wp[i] && ')' != wp[i])
 338                                 if ('\\' == wp[i++]) {
 339                                         /* Handle embedded escape. */
 340                                         *word = &wp[i];
 341                                         i += a2roffdeco(&dd, word, sz);
 342                                 }
 343
 344                         if (')' == wp[i++])
 345                                 break;
 346
 347                         *d = DECO_NONE;
 348                         return(i - 1);
 349                 } else if ('\\' == wp[i]) {
 350                         *word = &wp[++i];
 351                         i += a2roffdeco(&dd, word, sz);
 352                 }
 353
 354                 break;
 355         case ('['):
 356                 *d = DECO_SPECIAL;
 357                 term = ']';
 358                 break;
 359         case ('c'):
 360                 *d = DECO_NOSPACE;
 361                 return(i);
 362         case ('z'):
 363                 *d = DECO_NONE;
 364                 if ('\\' == wp[i]) {
 365                         *word = &wp[++i];
 366                         return(i + a2roffdeco(&dd, word, sz));
 367                 } else
 368                         lim = 1;
 369                 break;
 370         case ('o'):
 371                 /* FALLTHROUGH */
 372         case ('w'):
 373                 if ('\'' == wp[i++]) {
 374                         term = '\'';
 375                         break;
 376                 }
 377                 /* FALLTHROUGH */
 378         default:
 379                 *d = DECO_SSPECIAL;
 380                 i--;
 381                 lim = 1;
 382                 break;
 383         }
 384
 385         assert(term || lim);
 386         *word = &wp[i];
 387
 388         if (term) {
 389                 j = i;
 390                 while (wp[i] && wp[i] != term)
 391                         i++;
 392                 if ('\0' == wp[i]) {
 393                         *d = DECO_NONE;
 394                         return(i);
 395                 }
 396
 397                 assert(i >= j);
 398                 *sz = (size_t)(i - j);
 399
 400                 return(i + 1);
 401         }
 402
 403         assert(lim > 0);
 404         *sz = (size_t)lim;
 405
 406         for (j = 0; wp[i] && j < lim; j++)
 407                 i++;
 408         if (j < lim)
 409                 *d = DECO_NONE;
 410
 411         return(i);
 412 }
 413
 414 /*
 415  * Calculate the abstract widths and decimal positions of columns in a
 416  * table.  This routine allocates the columns structures then runs over
 417  * all rows and cells in the table.  The function pointers in "tbl" are
 418  * used for the actual width calculations.
 419  */
 420 void
 421 tblcalc(struct rofftbl *tbl, const struct tbl_span *sp)
 422 {
 423         const struct tbl_dat    *dp;
 424         const struct tbl_head   *hp;
 425         struct roffcol          *col;
 426
 427         /*
 428          * Allocate the master column specifiers.  These will hold the
 429          * widths and decimal positions for all cells in the column.  It
 430          * must be freed and nullified by the caller.
 431          */
 432
 433         assert(NULL == tbl->cols);
 434         tbl->cols = calloc(sp->tbl->cols, sizeof(struct roffcol));
 435
 436         hp = sp->head;
 437
 438         for ( ; sp; sp = sp->next) {
 439                 if (TBL_SPAN_DATA != sp->pos)
 440                         continue;
 441                 /*
 442                  * Account for the data cells in the layout, matching it
 443                  * to data cells in the data section.
 444                  */
 445                 for (dp = sp->first; dp; dp = dp->next) {
 446                         assert(dp->layout);
 447                         col = &tbl->cols[dp->layout->head->ident];
 448                         tblcalc_data(tbl, col, sp->tbl, dp);
 449                 }
 450         }
 451
 452         /*
 453          * Calculate width of the spanners.  These get one space for a
 454          * vertical line, two for a double-vertical line.
 455          */
 456
 457         for ( ; hp; hp = hp->next) {
 458                 col = &tbl->cols[hp->ident];
 459                 switch (hp->pos) {
 460                 case (TBL_HEAD_VERT):
 461                         col->width = (*tbl->len)(1, tbl->arg);
 462                         break;
 463                 case (TBL_HEAD_DVERT):
 464                         col->width = (*tbl->len)(2, tbl->arg);
 465                         break;
 466                 default:
 467                         break;
 468                 }
 469         }
 470 }
 471
 472 static void
 473 tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
 474                 const struct tbl *tp, const struct tbl_dat *dp)
 475 {
 476         size_t           sz;
 477
 478         /* Branch down into data sub-types. */
 479
 480         switch (dp->layout->pos) {
 481         case (TBL_CELL_HORIZ):
 482                 /* FALLTHROUGH */
 483         case (TBL_CELL_DHORIZ):
 484                 sz = (*tbl->len)(1, tbl->arg);
 485                 if (col->width < sz)
 486                         col->width = sz;
 487                 break;
 488         case (TBL_CELL_LONG):
 489                 /* FALLTHROUGH */
 490         case (TBL_CELL_CENTRE):
 491                 /* FALLTHROUGH */
 492         case (TBL_CELL_LEFT):
 493                 /* FALLTHROUGH */
 494         case (TBL_CELL_RIGHT):
 495                 tblcalc_literal(tbl, col, dp);
 496                 break;
 497         case (TBL_CELL_NUMBER):
 498                 tblcalc_number(tbl, col, tp, dp);
 499                 break;
 500         case (TBL_CELL_DOWN):
 501                 break;
 502         default:
 503                 abort();
 504                 /* NOTREACHED */
 505         }
 506 }
 507
 508 static void
 509 tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
 510                 const struct tbl_dat *dp)
 511 {
 512         size_t           sz, bufsz, spsz;
 513         const char      *str;
 514
 515         /*
 516          * Calculate our width and use the spacing, with a minimum
 517          * spacing dictated by position (centre, e.g,. gets a space on
 518          * either side, while right/left get a single adjacent space).
 519          */
 520
 521         bufsz = spsz = 0;
 522         str = dp->string ? dp->string : "";
 523         sz = (*tbl->slen)(str, tbl->arg);
 524
 525         /* FIXME: TBL_DATA_HORIZ et al.? */
 526
 527         assert(dp->layout);
 528         switch (dp->layout->pos) {
 529         case (TBL_CELL_LONG):
 530                 /* FALLTHROUGH */
 531         case (TBL_CELL_CENTRE):
 532                 bufsz = (*tbl->len)(1, tbl->arg);
 533                 break;
 534         default:
 535                 bufsz = (*tbl->len)(1, tbl->arg);
 536                 break;
 537         }
 538
 539         if (dp->layout->spacing) {
 540                 spsz = (*tbl->len)(dp->layout->spacing, tbl->arg);
 541                 bufsz = bufsz > spsz ? bufsz : spsz;
 542         }
 543
 544         sz += bufsz;
 545         if (col->width < sz)
 546                 col->width = sz;
 547 }
 548
 549 static void
 550 tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
 551                 const struct tbl *tp, const struct tbl_dat *dp)
 552 {
 553         int              i;
 554         size_t           sz, psz, ssz, d;
 555         const char      *str;
 556         char            *cp;
 557         char             buf[2];
 558
 559         /*
 560          * First calculate number width and decimal place (last + 1 for
 561          * no-decimal numbers).  If the stored decimal is subsequent
 562          * ours, make our size longer by that difference
 563          * (right-"shifting"); similarly, if ours is subsequent the
 564          * stored, then extend the stored size by the difference.
 565          * Finally, re-assign the stored values.
 566          */
 567
 568         str = dp->string ? dp->string : "";
 569         sz = (*tbl->slen)(str, tbl->arg);
 570
 571         /* FIXME: TBL_DATA_HORIZ et al.? */
 572
 573         buf[0] = tp->decimal;
 574         buf[1] = '\0';
 575
 576         psz = (*tbl->slen)(buf, tbl->arg);
 577
 578         if (NULL != (cp = strrchr(str, tp->decimal))) {
 579                 buf[1] = '\0';
 580                 for (ssz = 0, i = 0; cp != &str[i]; i++) {
 581                         buf[0] = str[i];
 582                         ssz += (*tbl->slen)(buf, tbl->arg);
 583                 }
 584                 d = ssz + psz;
 585         } else
 586                 d = sz + psz;
 587
 588         /* Padding. */
 589
 590         sz += (*tbl->len)(2, tbl->arg);
 591         d += (*tbl->len)(1, tbl->arg);
 592
 593         /* Adjust the settings for this column. */
 594
 595         if (col->decimal > d) {
 596                 sz += col->decimal - d;
 597                 d = col->decimal;
 598         } else
 599                 col->width += d - col->decimal;
 600
 601         if (sz > col->width)
 602                 col->width = sz;
 603         if (d > col->decimal)
 604                 col->decimal = d;
 605
 606         /* Adjust for stipulated width. */
 607
 608         if (col->width < dp->layout->spacing)
 609                 col->width = dp->layout->spacing;
 610 }
 611
 612