usr.bin/mandoc/mdoc_action.c

   1 /*      $Id: mdoc_action.c,v 1.50 2010/01/01 17:14:29 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   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.
  16  */
  17 #ifndef OSNAME
  18 #include <sys/utsname.h>
  19 #endif
  20
  21 #include <assert.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <time.h>
  26
  27 #include "libmdoc.h"
  28 #include "libmandoc.h"
  29
  30 #define POST_ARGS struct mdoc *m, struct mdoc_node *n
  31 #define PRE_ARGS  struct mdoc *m, const struct mdoc_node *n
  32
  33 #define NUMSIZ    32
  34 #define DATESIZ   32
  35
  36 struct  actions {
  37         int     (*pre)(PRE_ARGS);
  38         int     (*post)(POST_ARGS);
  39 };
  40
  41 static  int       concat(struct mdoc *, char *,
  42                         const struct mdoc_node *, size_t);
  43 static  inline int order_rs(int);
  44
  45 static  int       post_ar(POST_ARGS);
  46 static  int       post_at(POST_ARGS);
  47 static  int       post_bl(POST_ARGS);
  48 static  int       post_bl_head(POST_ARGS);
  49 static  int       post_bl_tagwidth(POST_ARGS);
  50 static  int       post_bl_width(POST_ARGS);
  51 static  int       post_dd(POST_ARGS);
  52 static  int       post_display(POST_ARGS);
  53 static  int       post_dt(POST_ARGS);
  54 static  int       post_lb(POST_ARGS);
  55 static  int       post_nm(POST_ARGS);
  56 static  int       post_os(POST_ARGS);
  57 static  int       post_pa(POST_ARGS);
  58 static  int       post_prol(POST_ARGS);
  59 static  int       post_rs(POST_ARGS);
  60 static  int       post_sh(POST_ARGS);
  61 static  int       post_st(POST_ARGS);
  62 static  int       post_std(POST_ARGS);
  63
  64 static  int       pre_bd(PRE_ARGS);
  65 static  int       pre_bl(PRE_ARGS);
  66 static  int       pre_dl(PRE_ARGS);
  67 static  int       pre_offset(PRE_ARGS);
  68
  69 static  const struct actions mdoc_actions[MDOC_MAX] = {
  70         { NULL, NULL }, /* Ap */
  71         { NULL, post_dd }, /* Dd */
  72         { NULL, post_dt }, /* Dt */
  73         { NULL, post_os }, /* Os */
  74         { NULL, post_sh }, /* Sh */
  75         { NULL, NULL }, /* Ss */
  76         { NULL, NULL }, /* Pp */
  77         { NULL, NULL }, /* D1 */
  78         { pre_dl, post_display }, /* Dl */
  79         { pre_bd, post_display }, /* Bd */
  80         { NULL, NULL }, /* Ed */
  81         { pre_bl, post_bl }, /* Bl */
  82         { NULL, NULL }, /* El */
  83         { NULL, NULL }, /* It */
  84         { NULL, NULL }, /* Ad */
  85         { NULL, NULL }, /* An */
  86         { NULL, post_ar }, /* Ar */
  87         { NULL, NULL }, /* Cd */
  88         { NULL, NULL }, /* Cm */
  89         { NULL, NULL }, /* Dv */
  90         { NULL, NULL }, /* Er */
  91         { NULL, NULL }, /* Ev */
  92         { NULL, post_std }, /* Ex */
  93         { NULL, NULL }, /* Fa */
  94         { NULL, NULL }, /* Fd */
  95         { NULL, NULL }, /* Fl */
  96         { NULL, NULL }, /* Fn */
  97         { NULL, NULL }, /* Ft */
  98         { NULL, NULL }, /* Ic */
  99         { NULL, NULL }, /* In */
 100         { NULL, NULL }, /* Li */
 101         { NULL, NULL }, /* Nd */
 102         { NULL, post_nm }, /* Nm */
 103         { NULL, NULL }, /* Op */
 104         { NULL, NULL }, /* Ot */
 105         { NULL, post_pa }, /* Pa */
 106         { NULL, post_std }, /* Rv */
 107         { NULL, post_st }, /* St */
 108         { NULL, NULL }, /* Va */
 109         { NULL, NULL }, /* Vt */
 110         { NULL, NULL }, /* Xr */
 111         { NULL, NULL }, /* %A */
 112         { NULL, NULL }, /* %B */
 113         { NULL, NULL }, /* %D */
 114         { NULL, NULL }, /* %I */
 115         { NULL, NULL }, /* %J */
 116         { NULL, NULL }, /* %N */
 117         { NULL, NULL }, /* %O */
 118         { NULL, NULL }, /* %P */
 119         { NULL, NULL }, /* %R */
 120         { NULL, NULL }, /* %T */
 121         { NULL, NULL }, /* %V */
 122         { NULL, NULL }, /* Ac */
 123         { NULL, NULL }, /* Ao */
 124         { NULL, NULL }, /* Aq */
 125         { NULL, post_at }, /* At */
 126         { NULL, NULL }, /* Bc */
 127         { NULL, NULL }, /* Bf */
 128         { NULL, NULL }, /* Bo */
 129         { NULL, NULL }, /* Bq */
 130         { NULL, NULL }, /* Bsx */
 131         { NULL, NULL }, /* Bx */
 132         { NULL, NULL }, /* Db */
 133         { NULL, NULL }, /* Dc */
 134         { NULL, NULL }, /* Do */
 135         { NULL, NULL }, /* Dq */
 136         { NULL, NULL }, /* Ec */
 137         { NULL, NULL }, /* Ef */
 138         { NULL, NULL }, /* Em */
 139         { NULL, NULL }, /* Eo */
 140         { NULL, NULL }, /* Fx */
 141         { NULL, NULL }, /* Ms */
 142         { NULL, NULL }, /* No */
 143         { NULL, NULL }, /* Ns */
 144         { NULL, NULL }, /* Nx */
 145         { NULL, NULL }, /* Ox */
 146         { NULL, NULL }, /* Pc */
 147         { NULL, NULL }, /* Pf */
 148         { NULL, NULL }, /* Po */
 149         { NULL, NULL }, /* Pq */
 150         { NULL, NULL }, /* Qc */
 151         { NULL, NULL }, /* Ql */
 152         { NULL, NULL }, /* Qo */
 153         { NULL, NULL }, /* Qq */
 154         { NULL, NULL }, /* Re */
 155         { NULL, post_rs }, /* Rs */
 156         { NULL, NULL }, /* Sc */
 157         { NULL, NULL }, /* So */
 158         { NULL, NULL }, /* Sq */
 159         { NULL, NULL }, /* Sm */
 160         { NULL, NULL }, /* Sx */
 161         { NULL, NULL }, /* Sy */
 162         { NULL, NULL }, /* Tn */
 163         { NULL, NULL }, /* Ux */
 164         { NULL, NULL }, /* Xc */
 165         { NULL, NULL }, /* Xo */
 166         { NULL, NULL }, /* Fo */
 167         { NULL, NULL }, /* Fc */
 168         { NULL, NULL }, /* Oo */
 169         { NULL, NULL }, /* Oc */
 170         { NULL, NULL }, /* Bk */
 171         { NULL, NULL }, /* Ek */
 172         { NULL, NULL }, /* Bt */
 173         { NULL, NULL }, /* Hf */
 174         { NULL, NULL }, /* Fr */
 175         { NULL, NULL }, /* Ud */
 176         { NULL, post_lb }, /* Lb */
 177         { NULL, NULL }, /* Lp */
 178         { NULL, NULL }, /* Lk */
 179         { NULL, NULL }, /* Mt */
 180         { NULL, NULL }, /* Brq */
 181         { NULL, NULL }, /* Bro */
 182         { NULL, NULL }, /* Brc */
 183         { NULL, NULL }, /* %C */
 184         { NULL, NULL }, /* Es */
 185         { NULL, NULL }, /* En */
 186         { NULL, NULL }, /* Dx */
 187         { NULL, NULL }, /* %Q */
 188         { NULL, NULL }, /* br */
 189         { NULL, NULL }, /* sp */
 190         { NULL, NULL }, /* %U */
 191 };
 192
 193 #define RSORD_MAX 14
 194
 195 static  const int rsord[RSORD_MAX] = {
 196         MDOC__A,
 197         MDOC__T,
 198         MDOC__B,
 199         MDOC__I,
 200         MDOC__J,
 201         MDOC__R,
 202         MDOC__N,
 203         MDOC__V,
 204         MDOC__P,
 205         MDOC__Q,
 206         MDOC__D,
 207         MDOC__O,
 208         MDOC__C,
 209         MDOC__U
 210 };
 211
 212
 213 int
 214 mdoc_action_pre(struct mdoc *m, const struct mdoc_node *n)
 215 {
 216
 217         switch (n->type) {
 218         case (MDOC_ROOT):
 219                 /* FALLTHROUGH */
 220         case (MDOC_TEXT):
 221                 return(1);
 222         default:
 223                 break;
 224         }
 225
 226         if (NULL == mdoc_actions[n->tok].pre)
 227                 return(1);
 228         return((*mdoc_actions[n->tok].pre)(m, n));
 229 }
 230
 231
 232 int
 233 mdoc_action_post(struct mdoc *m)
 234 {
 235
 236         if (MDOC_ACTED & m->last->flags)
 237                 return(1);
 238         m->last->flags |= MDOC_ACTED;
 239
 240         switch (m->last->type) {
 241         case (MDOC_TEXT):
 242                 /* FALLTHROUGH */
 243         case (MDOC_ROOT):
 244                 return(1);
 245         default:
 246                 break;
 247         }
 248
 249         if (NULL == mdoc_actions[m->last->tok].post)
 250                 return(1);
 251         return((*mdoc_actions[m->last->tok].post)(m, m->last));
 252 }
 253
 254
 255 /*
 256  * Concatenate sibling nodes together.  All siblings must be of type
 257  * MDOC_TEXT or an assertion is raised.  Concatenation is separated by a
 258  * single whitespace.
 259  */
 260 static int
 261 concat(struct mdoc *m, char *p, const struct mdoc_node *n, size_t sz)
 262 {
 263
 264         assert(sz);
 265         p[0] = '\0';
 266         for ( ; n; n = n->next) {
 267                 assert(MDOC_TEXT == n->type);
 268                 if (strlcat(p, n->string, sz) >= sz)
 269                         return(mdoc_nerr(m, n, ETOOLONG));
 270                 if (NULL == n->next)
 271                         continue;
 272                 if (strlcat(p, " ", sz) >= sz)
 273                         return(mdoc_nerr(m, n, ETOOLONG));
 274         }
 275
 276         return(1);
 277 }
 278
 279
 280 /*
 281  * Macros accepting `-std' as an argument have the name of the current
 282  * document (`Nm') filled in as the argument if it's not provided.
 283  */
 284 static int
 285 post_std(POST_ARGS)
 286 {
 287         struct mdoc_node        *nn;
 288
 289         if (n->child)
 290                 return(1);
 291
 292         nn = n;
 293         m->next = MDOC_NEXT_CHILD;
 294         assert(m->meta.name);
 295         if ( ! mdoc_word_alloc(m, n->line, n->pos, m->meta.name))
 296                 return(0);
 297         m->last = nn;
 298         return(1);
 299 }
 300
 301
 302 /*
 303  * The `Nm' macro's first use sets the name of the document.  See also
 304  * post_std(), etc.
 305  */
 306 static int
 307 post_nm(POST_ARGS)
 308 {
 309         char             buf[BUFSIZ];
 310
 311         if (m->meta.name)
 312                 return(1);
 313         if ( ! concat(m, buf, n->child, BUFSIZ))
 314                 return(0);
 315         m->meta.name = mandoc_strdup(buf);
 316         return(1);
 317 }
 318
 319
 320 /*
 321  * Look up the value of `Lb' for matching predefined strings.  If it has
 322  * one, then substitute the current value for the formatted value.  Note
 323  * that the lookup may fail (we can provide arbitrary strings).
 324  */
 325 /* ARGSUSED */
 326 static int
 327 post_lb(POST_ARGS)
 328 {
 329         const char      *p;
 330         char            *buf;
 331         size_t           sz;
 332
 333         assert(MDOC_TEXT == n->child->type);
 334         p = mdoc_a2lib(n->child->string);
 335
 336         if (p) {
 337                 free(n->child->string);
 338                 n->child->string = mandoc_strdup(p);
 339                 return(1);
 340         }
 341
 342         sz = strlen(n->child->string) +
 343                 2 + strlen("\\(lqlibrary\\(rq");
 344         buf = mandoc_malloc(sz);
 345         snprintf(buf, sz, "library \\(lq%s\\(rq", n->child->string);
 346         free(n->child->string);
 347         n->child->string = buf;
 348         return(1);
 349 }
 350
 351
 352 /*
 353  * Substitute the value of `St' for the corresponding formatted string.
 354  * We're guaranteed that this exists (it's been verified during the
 355  * validation phase).
 356  */
 357 /* ARGSUSED */
 358 static int
 359 post_st(POST_ARGS)
 360 {
 361         const char      *p;
 362
 363         assert(MDOC_TEXT == n->child->type);
 364         p = mdoc_a2st(n->child->string);
 365         assert(p);
 366         free(n->child->string);
 367         n->child->string = mandoc_strdup(p);
 368         return(1);
 369 }
 370
 371
 372 /*
 373  * Look up the standard string in a table.  We know that it exists from
 374  * the validation phase, so assert on failure.  If a standard key wasn't
 375  * supplied, supply the default ``AT&T UNIX''.
 376  */
 377 static int
 378 post_at(POST_ARGS)
 379 {
 380         struct mdoc_node        *nn;
 381         const char              *p;
 382
 383         if (n->child) {
 384                 assert(MDOC_TEXT == n->child->type);
 385                 p = mdoc_a2att(n->child->string);
 386                 assert(p);
 387                 free(n->child->string);
 388                 n->child->string = mandoc_strdup(p);
 389                 return(1);
 390         }
 391
 392         nn = n;
 393         m->next = MDOC_NEXT_CHILD;
 394         if ( ! mdoc_word_alloc(m, nn->line, nn->pos, "AT&T UNIX"))
 395                 return(0);
 396         m->last = nn;
 397         return(1);
 398 }
 399
 400
 401 /*
 402  * Mark the current section.  The ``named'' section (lastnamed) is set
 403  * whenever the current section isn't a custom section--we use this to
 404  * keep track of section ordering.  Also check that the section is
 405  * allowed within the document's manual section.
 406  */
 407 static int
 408 post_sh(POST_ARGS)
 409 {
 410         enum mdoc_sec    sec;
 411         char             buf[BUFSIZ];
 412
 413         if (MDOC_HEAD != n->type)
 414                 return(1);
 415
 416         if ( ! concat(m, buf, n->child, BUFSIZ))
 417                 return(0);
 418         sec = mdoc_atosec(buf);
 419         if (SEC_CUSTOM != sec)
 420                 m->lastnamed = sec;
 421
 422         /* Some sections only live in certain manual sections. */
 423
 424         switch ((m->lastsec = sec)) {
 425         case (SEC_RETURN_VALUES):
 426                 /* FALLTHROUGH */
 427         case (SEC_ERRORS):
 428                 switch (m->meta.msec) {
 429                 case (2):
 430                         /* FALLTHROUGH */
 431                 case (3):
 432                         /* FALLTHROUGH */
 433                 case (9):
 434                         break;
 435                 default:
 436                         return(mdoc_nwarn(m, n, EBADSEC));
 437                 }
 438                 break;
 439         default:
 440                 break;
 441         }
 442         return(1);
 443 }
 444
 445
 446 /*
 447  * Parse out the contents of `Dt'.  See in-line documentation for how we
 448  * handle the various fields of this macro.
 449  */
 450 static int
 451 post_dt(POST_ARGS)
 452 {
 453         struct mdoc_node *nn;
 454         const char       *cp;
 455         char             *ep;
 456         long              lval;
 457
 458         if (m->meta.title)
 459                 free(m->meta.title);
 460         if (m->meta.vol)
 461                 free(m->meta.vol);
 462         if (m->meta.arch)
 463                 free(m->meta.arch);
 464
 465         m->meta.title = m->meta.vol = m->meta.arch = NULL;
 466         m->meta.msec = 0;
 467
 468         /* Handles: `.Dt'
 469          *   --> title = unknown, volume = local, msec = 0, arch = NULL
 470          */
 471
 472         if (NULL == (nn = n->child)) {
 473                 /* XXX: make these macro values. */
 474                 m->meta.title = mandoc_strdup("unknown");
 475                 m->meta.vol = mandoc_strdup("local");
 476                 return(post_prol(m, n));
 477         }
 478
 479         /* Handles: `.Dt TITLE'
 480          *   --> title = TITLE, volume = local, msec = 0, arch = NULL
 481          */
 482
 483         m->meta.title = mandoc_strdup(nn->string);
 484
 485         if (NULL == (nn = nn->next)) {
 486                 /* XXX: make this a macro value. */
 487                 m->meta.vol = mandoc_strdup("local");
 488                 return(post_prol(m, n));
 489         }
 490
 491         /* Handles: `.Dt TITLE SEC'
 492          *   --> title = TITLE, volume = SEC is msec ?
 493          *           format(msec) : SEC,
 494          *       msec = SEC is msec ? atoi(msec) : 0,
 495          *       arch = NULL
 496          */
 497
 498         cp = mdoc_a2msec(nn->string);
 499         if (cp) {
 500                 /* FIXME: where is strtonum!? */
 501                 m->meta.vol = mandoc_strdup(cp);
 502                 lval = strtol(nn->string, &ep, 10);
 503                 if (nn->string[0] != '\0' && *ep == '\0')
 504                         m->meta.msec = (int)lval;
 505         } else
 506                 m->meta.vol = mandoc_strdup(nn->string);
 507
 508         if (NULL == (nn = nn->next))
 509                 return(post_prol(m, n));
 510
 511         /* Handles: `.Dt TITLE SEC VOL'
 512          *   --> title = TITLE, volume = VOL is vol ?
 513          *       format(VOL) :
 514          *           VOL is arch ? format(arch) :
 515          *               VOL
 516          */
 517
 518         cp = mdoc_a2vol(nn->string);
 519         if (cp) {
 520                 free(m->meta.vol);
 521                 m->meta.vol = mandoc_strdup(cp);
 522         } else {
 523                 cp = mdoc_a2arch(nn->string);
 524                 if (NULL == cp) {
 525                         free(m->meta.vol);
 526                         m->meta.vol = mandoc_strdup(nn->string);
 527                 } else
 528                         m->meta.arch = mandoc_strdup(cp);
 529         }
 530
 531         /* Ignore any subsequent parameters... */
 532         /* FIXME: warn about subsequent parameters. */
 533
 534         return(post_prol(m, n));
 535 }
 536
 537
 538 /*
 539  * Set the operating system by way of the `Os' macro.  Note that if an
 540  * argument isn't provided and -DOSNAME="\"foo\"" is provided during
 541  * compilation, this value will be used instead of filling in "sysname
 542  * release" from uname().
 543  */
 544 static int
 545 post_os(POST_ARGS)
 546 {
 547         char              buf[BUFSIZ];
 548 #ifndef OSNAME
 549         struct utsname    utsname;
 550 #endif
 551
 552         if (m->meta.os)
 553                 free(m->meta.os);
 554
 555         if ( ! concat(m, buf, n->child, BUFSIZ))
 556                 return(0);
 557
 558         if ('\0' == buf[0]) {
 559 #ifdef OSNAME
 560                 if (strlcat(buf, OSNAME, BUFSIZ) >= BUFSIZ)
 561                         return(mdoc_nerr(m, n, EUTSNAME));
 562 #else /*!OSNAME */
 563                 if (-1 == uname(&utsname))
 564                         return(mdoc_nerr(m, n, EUTSNAME));
 565                 if (strlcat(buf, utsname.sysname, BUFSIZ) >= BUFSIZ)
 566                         return(mdoc_nerr(m, n, ETOOLONG));
 567                 if (strlcat(buf, " ", 64) >= BUFSIZ)
 568                         return(mdoc_nerr(m, n, ETOOLONG));
 569                 if (strlcat(buf, utsname.release, BUFSIZ) >= BUFSIZ)
 570                         return(mdoc_nerr(m, n, ETOOLONG));
 571 #endif /*!OSNAME*/
 572         }
 573
 574         m->meta.os = mandoc_strdup(buf);
 575         return(post_prol(m, n));
 576 }
 577
 578
 579 /*
 580  * Calculate the -width for a `Bl -tag' list if it hasn't been provided.
 581  * Uses the first head macro.  NOTE AGAIN: this is ONLY if the -width
 582  * argument has NOT been provided.  See post_bl_width() for converting
 583  * the -width string.
 584  */
 585 static int
 586 post_bl_tagwidth(POST_ARGS)
 587 {
 588         struct mdoc_node *nn;
 589         size_t            sz;
 590         int               i;
 591         char              buf[NUMSIZ];
 592
 593         /* Defaults to ten ens. */
 594
 595         sz = 10; /* XXX: make this a macro value. */
 596         nn = n->body->child;
 597
 598         if (nn) {
 599                 assert(MDOC_BLOCK == nn->type);
 600                 assert(MDOC_It == nn->tok);
 601                 nn = nn->head->child;
 602                 if (MDOC_TEXT != nn->type) {
 603                         sz = mdoc_macro2len(nn->tok);
 604                         if (sz == 0) {
 605                                 if ( ! mdoc_nwarn(m, n, ENOWIDTH))
 606                                         return(0);
 607                                 sz = 10;
 608                         }
 609                 } else
 610                         sz = strlen(nn->string) + 1;
 611         }
 612
 613         snprintf(buf, NUMSIZ, "%zun", sz);
 614
 615         /*
 616          * We have to dynamically add this to the macro's argument list.
 617          * We're guaranteed that a MDOC_Width doesn't already exist.
 618          */
 619
 620         nn = n;
 621         assert(nn->args);
 622         i = (int)(nn->args->argc)++;
 623
 624         nn->args->argv = mandoc_realloc(nn->args->argv,
 625                         nn->args->argc * sizeof(struct mdoc_argv));
 626
 627         nn->args->argv[i].arg = MDOC_Width;
 628         nn->args->argv[i].line = n->line;
 629         nn->args->argv[i].pos = n->pos;
 630         nn->args->argv[i].sz = 1;
 631         nn->args->argv[i].value = mandoc_malloc(sizeof(char *));
 632         nn->args->argv[i].value[0] = mandoc_strdup(buf);
 633         return(1);
 634 }
 635
 636
 637 /*
 638  * Calculate the real width of a list from the -width string, which may
 639  * contain a macro (with a known default width), a literal string, or a
 640  * scaling width.
 641  */
 642 static int
 643 post_bl_width(POST_ARGS)
 644 {
 645         size_t            width;
 646         int               i, tok;
 647         char              buf[NUMSIZ];
 648         char             *p;
 649
 650         if (NULL == n->args)
 651                 return(1);
 652
 653         for (i = 0; i < (int)n->args->argc; i++)
 654                 if (MDOC_Width == n->args->argv[i].arg)
 655                         break;
 656
 657         if (i == (int)n->args->argc)
 658                 return(1);
 659         p = n->args->argv[i].value[0];
 660
 661         /*
 662          * If the value to -width is a macro, then we re-write it to be
 663          * the macro's width as set in share/tmac/mdoc/doc-common.
 664          */
 665
 666         if (0 == strcmp(p, "Ds"))
 667                 /* XXX: make into a macro. */
 668                 width = 6;
 669         else if (MDOC_MAX == (tok = mdoc_hash_find(p)))
 670                 return(1);
 671         else if (0 == (width = mdoc_macro2len(tok)))
 672                 return(mdoc_nwarn(m, n, ENOWIDTH));
 673
 674         /* The value already exists: free and reallocate it. */
 675
 676         snprintf(buf, NUMSIZ, "%zun", width);
 677         free(n->args->argv[i].value[0]);
 678         n->args->argv[i].value[0] = mandoc_strdup(buf);
 679         return(1);
 680 }
 681
 682
 683 /*
 684  * Do processing for -column lists, which can have two distinct styles
 685  * of invocation.  Merge this two styles into a consistent form.
 686  */
 687 /* ARGSUSED */
 688 static int
 689 post_bl_head(POST_ARGS)
 690 {
 691         int                      i, c;
 692         struct mdoc_node        *np, *nn, *nnp;
 693
 694         if (NULL == n->child)
 695                 return(1);
 696
 697         np = n->parent;
 698         assert(np->args);
 699
 700         for (c = 0; c < (int)np->args->argc; c++)
 701                 if (MDOC_Column == np->args->argv[c].arg)
 702                         break;
 703
 704         if (c == (int)np->args->argc)
 705                 return(1);
 706         assert(0 == np->args->argv[c].sz);
 707
 708         /*
 709          * Accomodate for new-style groff column syntax.  Shuffle the
 710          * child nodes, all of which must be TEXT, as arguments for the
 711          * column field.  Then, delete the head children.
 712          */
 713
 714         np->args->argv[c].sz = (size_t)n->nchild;
 715         np->args->argv[c].value = mandoc_malloc
 716                 ((size_t)n->nchild * sizeof(char *));
 717
 718         for (i = 0, nn = n->child; nn; i++) {
 719                 np->args->argv[c].value[i] = nn->string;
 720                 nn->string = NULL;
 721                 nnp = nn;
 722                 nn = nn->next;
 723                 mdoc_node_free(nnp);
 724         }
 725
 726         n->nchild = 0;
 727         n->child = NULL;
 728         return(1);
 729 }
 730
 731
 732 static int
 733 post_bl(POST_ARGS)
 734 {
 735         int               i, r, len;
 736
 737         if (MDOC_HEAD == n->type)
 738                 return(post_bl_head(m, n));
 739         if (MDOC_BLOCK != n->type)
 740                 return(1);
 741
 742         /*
 743          * These are fairly complicated, so we've broken them into two
 744          * functions.  post_bl_tagwidth() is called when a -tag is
 745          * specified, but no -width (it must be guessed).  The second
 746          * when a -width is specified (macro indicators must be
 747          * rewritten into real lengths).
 748          */
 749
 750         len = (int)(n->args ? n->args->argc : 0);
 751
 752         for (r = i = 0; i < len; i++) {
 753                 if (MDOC_Tag == n->args->argv[i].arg)
 754                         r |= 1 << 0;
 755                 if (MDOC_Width == n->args->argv[i].arg)
 756                         r |= 1 << 1;
 757         }
 758
 759         if (r & (1 << 0) && ! (r & (1 << 1))) {
 760                 if ( ! post_bl_tagwidth(m, n))
 761                         return(0);
 762         } else if (r & (1 << 1))
 763                 if ( ! post_bl_width(m, n))
 764                         return(0);
 765
 766         return(1);
 767 }
 768
 769
 770 /*
 771  * The `Pa' macro defaults to a tilde if no value is provided as an
 772  * argument.
 773  */
 774 static int
 775 post_pa(POST_ARGS)
 776 {
 777         struct mdoc_node *np;
 778
 779         if (n->child)
 780                 return(1);
 781
 782         np = n;
 783         m->next = MDOC_NEXT_CHILD;
 784         /* XXX: make into macro value. */
 785         if ( ! mdoc_word_alloc(m, n->line, n->pos, "~"))
 786                 return(0);
 787         m->last = np;
 788         return(1);
 789 }
 790
 791
 792 /*
 793  * The `Ar' macro defaults to two strings "file ..." if no value is
 794  * provided as an argument.
 795  */
 796 static int
 797 post_ar(POST_ARGS)
 798 {
 799         struct mdoc_node *np;
 800
 801         if (n->child)
 802                 return(1);
 803
 804         np = n;
 805         m->next = MDOC_NEXT_CHILD;
 806         /* XXX: make into macro values. */
 807         if ( ! mdoc_word_alloc(m, n->line, n->pos, "file"))
 808                 return(0);
 809         if ( ! mdoc_word_alloc(m, n->line, n->pos, "..."))
 810                 return(0);
 811         m->last = np;
 812         return(1);
 813 }
 814
 815
 816 /*
 817  * Parse the date field in `Dd'.
 818  */
 819 static int
 820 post_dd(POST_ARGS)
 821 {
 822         char            buf[DATESIZ];
 823
 824         if ( ! concat(m, buf, n->child, DATESIZ))
 825                 return(0);
 826
 827         m->meta.date = mandoc_a2time
 828                 (MTIME_MDOCDATE | MTIME_CANONICAL, buf);
 829
 830         if (0 == m->meta.date) {
 831                 if ( ! mdoc_nwarn(m, n, EBADDATE))
 832                         return(0);
 833                 m->meta.date = time(NULL);
 834         }
 835
 836         return(post_prol(m, n));
 837 }
 838
 839
 840 /*
 841  * Remove prologue macros from the document after they're processed.
 842  * The final document uses mdoc_meta for these values and discards the
 843  * originals.
 844  */
 845 static int
 846 post_prol(POST_ARGS)
 847 {
 848         struct mdoc_node *np;
 849
 850         if (n->parent->child == n)
 851                 n->parent->child = n->prev;
 852         if (n->prev)
 853                 n->prev->next = NULL;
 854
 855         np = n;
 856         assert(NULL == n->next);
 857
 858         if (n->prev) {
 859                 m->last = n->prev;
 860                 m->next = MDOC_NEXT_SIBLING;
 861         } else {
 862                 m->last = n->parent;
 863                 m->next = MDOC_NEXT_CHILD;
 864         }
 865
 866         mdoc_node_freelist(np);
 867
 868         if (m->meta.title && m->meta.date && m->meta.os)
 869                 m->flags |= MDOC_PBODY;
 870
 871         return(1);
 872 }
 873
 874
 875 /*
 876  * Trigger a literal context.
 877  */
 878 static int
 879 pre_dl(PRE_ARGS)
 880 {
 881
 882         if (MDOC_BODY == n->type)
 883                 m->flags |= MDOC_LITERAL;
 884         return(1);
 885 }
 886
 887
 888 /* ARGSUSED */
 889 static int
 890 pre_offset(PRE_ARGS)
 891 {
 892         int              i;
 893
 894         /*
 895          * Make sure that an empty offset produces an 8n length space as
 896          * stipulated by mdoc.samples.
 897          */
 898
 899         assert(n->args);
 900         for (i = 0; i < (int)n->args->argc; i++) {
 901                 if (MDOC_Offset != n->args->argv[i].arg)
 902                         continue;
 903                 if (n->args->argv[i].sz)
 904                         break;
 905                 assert(1 == n->args->refcnt);
 906                 /* If no value set, length of <string>. */
 907                 n->args->argv[i].sz++;
 908                 n->args->argv[i].value = mandoc_malloc(sizeof(char *));
 909                 n->args->argv[i].value[0] = mandoc_strdup("8n");
 910                 break;
 911         }
 912
 913         return(1);
 914 }
 915
 916
 917 static int
 918 pre_bl(PRE_ARGS)
 919 {
 920
 921         return(MDOC_BLOCK == n->type ? pre_offset(m, n) : 1);
 922 }
 923
 924
 925 static int
 926 pre_bd(PRE_ARGS)
 927 {
 928         int              i;
 929
 930         if (MDOC_BLOCK == n->type)
 931                 return(pre_offset(m, n));
 932         if (MDOC_BODY != n->type)
 933                 return(1);
 934
 935         /* Enter literal context if `Bd -literal' or `-unfilled'. */
 936
 937         for (n = n->parent, i = 0; i < (int)n->args->argc; i++)
 938                 if (MDOC_Literal == n->args->argv[i].arg)
 939                         m->flags |= MDOC_LITERAL;
 940                 else if (MDOC_Unfilled == n->args->argv[i].arg)
 941                         m->flags |= MDOC_LITERAL;
 942
 943         return(1);
 944 }
 945
 946
 947 static int
 948 post_display(POST_ARGS)
 949 {
 950
 951         if (MDOC_BODY == n->type)
 952                 m->flags &= ~MDOC_LITERAL;
 953         return(1);
 954 }
 955
 956
 957 static inline int
 958 order_rs(int t)
 959 {
 960         int             i;
 961
 962         for (i = 0; i < RSORD_MAX; i++)
 963                 if (rsord[i] == t)
 964                         return(i);
 965
 966         abort();
 967         /* NOTREACHED */
 968 }
 969
 970
 971 /* ARGSUSED */
 972 static int
 973 post_rs(POST_ARGS)
 974 {
 975         struct mdoc_node        *nn, *next, *prev;
 976         int                      o;
 977
 978         if (MDOC_BLOCK != n->type)
 979                 return(1);
 980
 981         assert(n->body->child);
 982         for (next = NULL, nn = n->body->child->next; nn; nn = next) {
 983                 o = order_rs(nn->tok);
 984
 985                 /* Remove `nn' from the chain. */
 986                 next = nn->next;
 987                 if (next)
 988                         next->prev = nn->prev;
 989
 990                 prev = nn->prev;
 991                 if (prev)
 992                         prev->next = nn->next;
 993
 994                 nn->prev = nn->next = NULL;
 995
 996                 /*
 997                  * Scan back until we reach a node that's ordered before
 998                  * us, then set ourselves as being the next.
 999                  */
1000                 for ( ; prev; prev = prev->prev)
1001                         if (order_rs(prev->tok) <= o)
1002                                 break;
1003
1004                 nn->prev = prev;
1005                 if (prev) {
1006                         if (prev->next)
1007                                 prev->next->prev = nn;
1008                         nn->next = prev->next;
1009                         prev->next = nn;
1010                         continue;
1011                 }
1012
1013                 n->body->child->prev = nn;
1014                 nn->next = n->body->child;
1015                 n->body->child = nn;
1016         }
1017         return(1);
1018 }