mdoc_action.c

   1 /*      $Id: mdoc_action.c,v 1.85 2010/11/29 16:06:46 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
   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 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #ifndef OSNAME
  22 #include <sys/utsname.h>
  23 #endif
  24
  25 #include <assert.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <time.h>
  30
  31 #include "mandoc.h"
  32 #include "libmdoc.h"
  33 #include "libmandoc.h"
  34
  35 /*
  36  * FIXME: this file is deprecated.  All future "actions" should be
  37  * pushed into mdoc_validate.c.
  38  */
  39
  40 #define POST_ARGS struct mdoc *m, struct mdoc_node *n
  41 #define PRE_ARGS  struct mdoc *m, struct mdoc_node *n
  42
  43 #define NUMSIZ    32
  44 #define DATESIZ   32
  45
  46 struct  actions {
  47         int     (*pre)(PRE_ARGS);
  48         int     (*post)(POST_ARGS);
  49 };
  50
  51 static  int       concat(struct mdoc *, char *,
  52                         const struct mdoc_node *, size_t);
  53
  54 static  int       post_bl(POST_ARGS);
  55 static  int       post_bl_head(POST_ARGS);
  56 static  int       post_bl_tagwidth(POST_ARGS);
  57 static  int       post_bl_width(POST_ARGS);
  58 static  int       post_dd(POST_ARGS);
  59 static  int       post_dt(POST_ARGS);
  60 static  int       post_os(POST_ARGS);
  61 static  int       post_prol(POST_ARGS);
  62 static  int       post_std(POST_ARGS);
  63
  64 static  const struct actions mdoc_actions[MDOC_MAX] = {
  65         { NULL, NULL }, /* Ap */
  66         { NULL, post_dd }, /* Dd */
  67         { NULL, post_dt }, /* Dt */
  68         { NULL, post_os }, /* Os */
  69         { NULL, NULL }, /* Sh */
  70         { NULL, NULL }, /* Ss */
  71         { NULL, NULL }, /* Pp */
  72         { NULL, NULL }, /* D1 */
  73         { NULL, NULL }, /* Dl */
  74         { NULL, NULL }, /* Bd */
  75         { NULL, NULL }, /* Ed */
  76         { NULL, post_bl }, /* Bl */
  77         { NULL, NULL }, /* El */
  78         { NULL, NULL }, /* It */
  79         { NULL, NULL }, /* Ad */
  80         { NULL, NULL }, /* An */
  81         { NULL, NULL }, /* Ar */
  82         { NULL, NULL }, /* Cd */
  83         { NULL, NULL }, /* Cm */
  84         { NULL, NULL }, /* Dv */
  85         { NULL, NULL }, /* Er */
  86         { NULL, NULL }, /* Ev */
  87         { NULL, post_std }, /* Ex */
  88         { NULL, NULL }, /* Fa */
  89         { NULL, NULL }, /* Fd */
  90         { NULL, NULL }, /* Fl */
  91         { NULL, NULL }, /* Fn */
  92         { NULL, NULL }, /* Ft */
  93         { NULL, NULL }, /* Ic */
  94         { NULL, NULL }, /* In */
  95         { NULL, NULL }, /* Li */
  96         { NULL, NULL }, /* Nd */
  97         { NULL, NULL }, /* Nm */
  98         { NULL, NULL }, /* Op */
  99         { NULL, NULL }, /* Ot */
 100         { NULL, NULL }, /* Pa */
 101         { NULL, post_std }, /* Rv */
 102         { NULL, NULL }, /* St */
 103         { NULL, NULL }, /* Va */
 104         { NULL, NULL }, /* Vt */
 105         { NULL, NULL }, /* Xr */
 106         { NULL, NULL }, /* %A */
 107         { NULL, NULL }, /* %B */
 108         { NULL, NULL }, /* %D */
 109         { NULL, NULL }, /* %I */
 110         { NULL, NULL }, /* %J */
 111         { NULL, NULL }, /* %N */
 112         { NULL, NULL }, /* %O */
 113         { NULL, NULL }, /* %P */
 114         { NULL, NULL }, /* %R */
 115         { NULL, NULL }, /* %T */
 116         { NULL, NULL }, /* %V */
 117         { NULL, NULL }, /* Ac */
 118         { NULL, NULL }, /* Ao */
 119         { NULL, NULL }, /* Aq */
 120         { NULL, NULL }, /* At */
 121         { NULL, NULL }, /* Bc */
 122         { NULL, NULL }, /* Bf */
 123         { NULL, NULL }, /* Bo */
 124         { NULL, NULL }, /* Bq */
 125         { NULL, NULL }, /* Bsx */
 126         { NULL, NULL }, /* Bx */
 127         { NULL, NULL }, /* Db */
 128         { NULL, NULL }, /* Dc */
 129         { NULL, NULL }, /* Do */
 130         { NULL, NULL }, /* Dq */
 131         { NULL, NULL }, /* Ec */
 132         { NULL, NULL }, /* Ef */
 133         { NULL, NULL }, /* Em */
 134         { NULL, NULL }, /* Eo */
 135         { NULL, NULL }, /* Fx */
 136         { NULL, NULL }, /* Ms */
 137         { NULL, NULL }, /* No */
 138         { NULL, NULL }, /* Ns */
 139         { NULL, NULL }, /* Nx */
 140         { NULL, NULL }, /* Ox */
 141         { NULL, NULL }, /* Pc */
 142         { NULL, NULL }, /* Pf */
 143         { NULL, NULL }, /* Po */
 144         { NULL, NULL }, /* Pq */
 145         { NULL, NULL }, /* Qc */
 146         { NULL, NULL }, /* Ql */
 147         { NULL, NULL }, /* Qo */
 148         { NULL, NULL }, /* Qq */
 149         { NULL, NULL }, /* Re */
 150         { NULL, NULL }, /* Rs */
 151         { NULL, NULL }, /* Sc */
 152         { NULL, NULL }, /* So */
 153         { NULL, NULL }, /* Sq */
 154         { NULL, NULL }, /* Sm */
 155         { NULL, NULL }, /* Sx */
 156         { NULL, NULL }, /* Sy */
 157         { NULL, NULL }, /* Tn */
 158         { NULL, NULL }, /* Ux */
 159         { NULL, NULL }, /* Xc */
 160         { NULL, NULL }, /* Xo */
 161         { NULL, NULL }, /* Fo */
 162         { NULL, NULL }, /* Fc */
 163         { NULL, NULL }, /* Oo */
 164         { NULL, NULL }, /* Oc */
 165         { NULL, NULL }, /* Bk */
 166         { NULL, NULL }, /* Ek */
 167         { NULL, NULL }, /* Bt */
 168         { NULL, NULL }, /* Hf */
 169         { NULL, NULL }, /* Fr */
 170         { NULL, NULL }, /* Ud */
 171         { NULL, NULL }, /* Lb */
 172         { NULL, NULL }, /* Lp */
 173         { NULL, NULL }, /* Lk */
 174         { NULL, NULL }, /* Mt */
 175         { NULL, NULL }, /* Brq */
 176         { NULL, NULL }, /* Bro */
 177         { NULL, NULL }, /* Brc */
 178         { NULL, NULL }, /* %C */
 179         { NULL, NULL }, /* Es */
 180         { NULL, NULL }, /* En */
 181         { NULL, NULL }, /* Dx */
 182         { NULL, NULL }, /* %Q */
 183         { NULL, NULL }, /* br */
 184         { NULL, NULL }, /* sp */
 185         { NULL, NULL }, /* %U */
 186         { NULL, NULL }, /* Ta */
 187 };
 188
 189
 190 int
 191 mdoc_action_pre(struct mdoc *m, struct mdoc_node *n)
 192 {
 193
 194         switch (n->type) {
 195         case (MDOC_ROOT):
 196                 /* FALLTHROUGH */
 197         case (MDOC_TEXT):
 198                 return(1);
 199         default:
 200                 break;
 201         }
 202
 203         if (NULL == mdoc_actions[n->tok].pre)
 204                 return(1);
 205         return((*mdoc_actions[n->tok].pre)(m, n));
 206 }
 207
 208
 209 int
 210 mdoc_action_post(struct mdoc *m)
 211 {
 212
 213         if (MDOC_ACTED & m->last->flags)
 214                 return(1);
 215         m->last->flags |= MDOC_ACTED;
 216
 217         switch (m->last->type) {
 218         case (MDOC_TEXT):
 219                 /* FALLTHROUGH */
 220         case (MDOC_ROOT):
 221                 return(1);
 222         default:
 223                 break;
 224         }
 225
 226         if (NULL == mdoc_actions[m->last->tok].post)
 227                 return(1);
 228         return((*mdoc_actions[m->last->tok].post)(m, m->last));
 229 }
 230
 231
 232 /*
 233  * Concatenate sibling nodes together.  All siblings must be of type
 234  * MDOC_TEXT or an assertion is raised.  Concatenation is separated by a
 235  * single whitespace.
 236  */
 237 static int
 238 concat(struct mdoc *m, char *p, const struct mdoc_node *n, size_t sz)
 239 {
 240
 241         assert(sz);
 242         p[0] = '\0';
 243         for ( ; n; n = n->next) {
 244                 assert(MDOC_TEXT == n->type);
 245                 /*
 246                  * XXX: yes, these can technically be resized, but it's
 247                  * highly unlikely that we're going to get here, so let
 248                  * it slip for now.
 249                  */
 250                 if (strlcat(p, n->string, sz) >= sz) {
 251                         mdoc_nmsg(m, n, MANDOCERR_MEM);
 252                         return(0);
 253                 }
 254                 if (NULL == n->next)
 255                         continue;
 256                 if (strlcat(p, " ", sz) >= sz) {
 257                         mdoc_nmsg(m, n, MANDOCERR_MEM);
 258                         return(0);
 259                 }
 260         }
 261
 262         return(1);
 263 }
 264
 265
 266 /*
 267  * Macros accepting `-std' as an argument have the name of the current
 268  * document (`Nm') filled in as the argument if it's not provided.
 269  */
 270 static int
 271 post_std(POST_ARGS)
 272 {
 273         struct mdoc_node *nn;
 274
 275         if (n->child)
 276                 return(1);
 277         if (NULL == m->meta.name)
 278                 return(1);
 279
 280         nn = n;
 281         m->next = MDOC_NEXT_CHILD;
 282
 283         if ( ! mdoc_word_alloc(m, n->line, n->pos, m->meta.name))
 284                 return(0);
 285         m->last = nn;
 286         return(1);
 287 }
 288
 289 /*
 290  * Parse out the contents of `Dt'.  See in-line documentation for how we
 291  * handle the various fields of this macro.
 292  */
 293 static int
 294 post_dt(POST_ARGS)
 295 {
 296         struct mdoc_node *nn;
 297         const char       *cp;
 298
 299         if (m->meta.title)
 300                 free(m->meta.title);
 301         if (m->meta.vol)
 302                 free(m->meta.vol);
 303         if (m->meta.arch)
 304                 free(m->meta.arch);
 305
 306         m->meta.title = m->meta.vol = m->meta.arch = NULL;
 307         /* Handles: `.Dt'
 308          *   --> title = unknown, volume = local, msec = 0, arch = NULL
 309          */
 310
 311         if (NULL == (nn = n->child)) {
 312                 /* XXX: make these macro values. */
 313                 /* FIXME: warn about missing values. */
 314                 m->meta.title = mandoc_strdup("UNKNOWN");
 315                 m->meta.vol = mandoc_strdup("LOCAL");
 316                 m->meta.msec = mandoc_strdup("1");
 317                 return(post_prol(m, n));
 318         }
 319
 320         /* Handles: `.Dt TITLE'
 321          *   --> title = TITLE, volume = local, msec = 0, arch = NULL
 322          */
 323
 324         m->meta.title = mandoc_strdup
 325                 ('\0' == nn->string[0] ? "UNKNOWN" : nn->string);
 326
 327         if (NULL == (nn = nn->next)) {
 328                 /* FIXME: warn about missing msec. */
 329                 /* XXX: make this a macro value. */
 330                 m->meta.vol = mandoc_strdup("LOCAL");
 331                 m->meta.msec = mandoc_strdup("1");
 332                 return(post_prol(m, n));
 333         }
 334
 335         /* Handles: `.Dt TITLE SEC'
 336          *   --> title = TITLE, volume = SEC is msec ?
 337          *           format(msec) : SEC,
 338          *       msec = SEC is msec ? atoi(msec) : 0,
 339          *       arch = NULL
 340          */
 341
 342         cp = mdoc_a2msec(nn->string);
 343         if (cp) {
 344                 m->meta.vol = mandoc_strdup(cp);
 345                 m->meta.msec = mandoc_strdup(nn->string);
 346         } else if (mdoc_nmsg(m, n, MANDOCERR_BADMSEC)) {
 347                 m->meta.vol = mandoc_strdup(nn->string);
 348                 m->meta.msec = mandoc_strdup(nn->string);
 349         } else
 350                 return(0);
 351
 352         if (NULL == (nn = nn->next))
 353                 return(post_prol(m, n));
 354
 355         /* Handles: `.Dt TITLE SEC VOL'
 356          *   --> title = TITLE, volume = VOL is vol ?
 357          *       format(VOL) :
 358          *           VOL is arch ? format(arch) :
 359          *               VOL
 360          */
 361
 362         cp = mdoc_a2vol(nn->string);
 363         if (cp) {
 364                 free(m->meta.vol);
 365                 m->meta.vol = mandoc_strdup(cp);
 366         } else {
 367                 /* FIXME: warn about bad arch. */
 368                 cp = mdoc_a2arch(nn->string);
 369                 if (NULL == cp) {
 370                         free(m->meta.vol);
 371                         m->meta.vol = mandoc_strdup(nn->string);
 372                 } else
 373                         m->meta.arch = mandoc_strdup(cp);
 374         }
 375
 376         /* Ignore any subsequent parameters... */
 377         /* FIXME: warn about subsequent parameters. */
 378
 379         return(post_prol(m, n));
 380 }
 381
 382
 383 /*
 384  * Set the operating system by way of the `Os' macro.  Note that if an
 385  * argument isn't provided and -DOSNAME="\"foo\"" is provided during
 386  * compilation, this value will be used instead of filling in "sysname
 387  * release" from uname().
 388  */
 389 static int
 390 post_os(POST_ARGS)
 391 {
 392         char              buf[BUFSIZ];
 393 #ifndef OSNAME
 394         struct utsname    utsname;
 395 #endif
 396
 397         if (m->meta.os)
 398                 free(m->meta.os);
 399
 400         if ( ! concat(m, buf, n->child, BUFSIZ))
 401                 return(0);
 402
 403         /* XXX: yes, these can all be dynamically-adjusted buffers, but
 404          * it's really not worth the extra hackery.
 405          */
 406
 407         if ('\0' == buf[0]) {
 408 #ifdef OSNAME
 409                 if (strlcat(buf, OSNAME, BUFSIZ) >= BUFSIZ) {
 410                         mdoc_nmsg(m, n, MANDOCERR_MEM);
 411                         return(0);
 412                 }
 413 #else /*!OSNAME */
 414                 if (-1 == uname(&utsname))
 415                         return(mdoc_nmsg(m, n, MANDOCERR_UTSNAME));
 416
 417                 if (strlcat(buf, utsname.sysname, BUFSIZ) >= BUFSIZ) {
 418                         mdoc_nmsg(m, n, MANDOCERR_MEM);
 419                         return(0);
 420                 }
 421                 if (strlcat(buf, " ", 64) >= BUFSIZ) {
 422                         mdoc_nmsg(m, n, MANDOCERR_MEM);
 423                         return(0);
 424                 }
 425                 if (strlcat(buf, utsname.release, BUFSIZ) >= BUFSIZ) {
 426                         mdoc_nmsg(m, n, MANDOCERR_MEM);
 427                         return(0);
 428                 }
 429 #endif /*!OSNAME*/
 430         }
 431
 432         m->meta.os = mandoc_strdup(buf);
 433         return(post_prol(m, n));
 434 }
 435
 436
 437 /*
 438  * Calculate the -width for a `Bl -tag' list if it hasn't been provided.
 439  * Uses the first head macro.  NOTE AGAIN: this is ONLY if the -width
 440  * argument has NOT been provided.  See post_bl_width() for converting
 441  * the -width string.
 442  */
 443 static int
 444 post_bl_tagwidth(POST_ARGS)
 445 {
 446         struct mdoc_node *nn;
 447         size_t            sz, ssz;
 448         int               i;
 449         char              buf[NUMSIZ];
 450
 451         sz = 10;
 452
 453         for (nn = n->body->child; nn; nn = nn->next) {
 454                 if (MDOC_It != nn->tok)
 455                         continue;
 456
 457                 assert(MDOC_BLOCK == nn->type);
 458                 nn = nn->head->child;
 459
 460                 if (nn == NULL) {
 461                         /* No -width for .Bl and first .It is emtpy */
 462                         if ( ! mdoc_nmsg(m, n, MANDOCERR_NOWIDTHARG))
 463                                 return(0);
 464                         break;
 465                 }
 466
 467                 if (MDOC_TEXT == nn->type) {
 468                         sz = strlen(nn->string) + 1;
 469                         break;
 470                 }
 471
 472                 if (0 != (ssz = mdoc_macro2len(nn->tok)))
 473                         sz = ssz;
 474                 else if ( ! mdoc_nmsg(m, n, MANDOCERR_NOWIDTHARG))
 475                         return(0);
 476
 477                 break;
 478         }
 479
 480         /* Defaults to ten ens. */
 481
 482         snprintf(buf, NUMSIZ, "%zun", sz);
 483
 484         /*
 485          * We have to dynamically add this to the macro's argument list.
 486          * We're guaranteed that a MDOC_Width doesn't already exist.
 487          */
 488
 489         assert(n->args);
 490         i = (int)(n->args->argc)++;
 491
 492         n->args->argv = mandoc_realloc(n->args->argv,
 493                         n->args->argc * sizeof(struct mdoc_argv));
 494
 495         n->args->argv[i].arg = MDOC_Width;
 496         n->args->argv[i].line = n->line;
 497         n->args->argv[i].pos = n->pos;
 498         n->args->argv[i].sz = 1;
 499         n->args->argv[i].value = mandoc_malloc(sizeof(char *));
 500         n->args->argv[i].value[0] = mandoc_strdup(buf);
 501
 502         /* Set our width! */
 503         n->data.Bl->width = n->args->argv[i].value[0];
 504         return(1);
 505 }
 506
 507
 508 /*
 509  * Calculate the real width of a list from the -width string, which may
 510  * contain a macro (with a known default width), a literal string, or a
 511  * scaling width.
 512  */
 513 static int
 514 post_bl_width(POST_ARGS)
 515 {
 516         size_t            width;
 517         int               i;
 518         enum mdoct        tok;
 519         char              buf[NUMSIZ];
 520
 521         /*
 522          * If the value to -width is a macro, then we re-write it to be
 523          * the macro's width as set in share/tmac/mdoc/doc-common.
 524          */
 525
 526         if (0 == strcmp(n->data.Bl->width, "Ds"))
 527                 width = 6;
 528         else if (MDOC_MAX == (tok = mdoc_hash_find(n->data.Bl->width)))
 529                 return(1);
 530         else if (0 == (width = mdoc_macro2len(tok)))
 531                 return(mdoc_nmsg(m, n, MANDOCERR_BADWIDTH));
 532
 533         /* The value already exists: free and reallocate it. */
 534
 535         assert(n->args);
 536
 537         for (i = 0; i < (int)n->args->argc; i++)
 538                 if (MDOC_Width == n->args->argv[i].arg)
 539                         break;
 540
 541         assert(i < (int)n->args->argc);
 542
 543         snprintf(buf, NUMSIZ, "%zun", width);
 544         free(n->args->argv[i].value[0]);
 545         n->args->argv[i].value[0] = mandoc_strdup(buf);
 546
 547         /* Set our width! */
 548         n->data.Bl->width = n->args->argv[i].value[0];
 549         return(1);
 550 }
 551
 552
 553 /*
 554  * Do processing for -column lists, which can have two distinct styles
 555  * of invocation.  Merge this two styles into a consistent form.
 556  */
 557 /* ARGSUSED */
 558 static int
 559 post_bl_head(POST_ARGS)
 560 {
 561         int                      i, c;
 562         struct mdoc_node        *np, *nn, *nnp;
 563
 564         if (LIST_column != n->data.Bl->type)
 565                 return(1);
 566         else if (NULL == n->child)
 567                 return(1);
 568
 569         np = n->parent;
 570         assert(np->args);
 571
 572         for (c = 0; c < (int)np->args->argc; c++)
 573                 if (MDOC_Column == np->args->argv[c].arg)
 574                         break;
 575
 576         assert(c < (int)np->args->argc);
 577         assert(0 == np->args->argv[c].sz);
 578
 579         /*
 580          * Accomodate for new-style groff column syntax.  Shuffle the
 581          * child nodes, all of which must be TEXT, as arguments for the
 582          * column field.  Then, delete the head children.
 583          */
 584
 585         np->args->argv[c].sz = (size_t)n->nchild;
 586         np->args->argv[c].value = mandoc_malloc
 587                 ((size_t)n->nchild * sizeof(char *));
 588
 589         n->data.Bl->ncols = np->args->argv[c].sz;
 590         n->data.Bl->cols = (const char **)np->args->argv[c].value;
 591
 592         for (i = 0, nn = n->child; nn; i++) {
 593                 np->args->argv[c].value[i] = nn->string;
 594                 nn->string = NULL;
 595                 nnp = nn;
 596                 nn = nn->next;
 597                 mdoc_node_delete(NULL, nnp);
 598         }
 599
 600         n->nchild = 0;
 601         n->child = NULL;
 602         return(1);
 603 }
 604
 605
 606 static int
 607 post_bl(POST_ARGS)
 608 {
 609
 610         if (MDOC_HEAD == n->type)
 611                 return(post_bl_head(m, n));
 612         if (MDOC_BLOCK != n->type)
 613                 return(1);
 614
 615         /*
 616          * These are fairly complicated, so we've broken them into two
 617          * functions.  post_bl_tagwidth() is called when a -tag is
 618          * specified, but no -width (it must be guessed).  The second
 619          * when a -width is specified (macro indicators must be
 620          * rewritten into real lengths).
 621          */
 622
 623         if (LIST_tag == n->data.Bl->type && NULL == n->data.Bl->width) {
 624                 if ( ! post_bl_tagwidth(m, n))
 625                         return(0);
 626         } else if (NULL != n->data.Bl->width) {
 627                 if ( ! post_bl_width(m, n))
 628                         return(0);
 629         } else
 630                 return(1);
 631
 632         assert(n->data.Bl->width);
 633         return(1);
 634 }
 635
 636 /*
 637  * Parse the date field in `Dd'.
 638  */
 639 static int
 640 post_dd(POST_ARGS)
 641 {
 642         char            buf[DATESIZ];
 643
 644         if (NULL == n->child) {
 645                 m->meta.date = time(NULL);
 646                 return(post_prol(m, n));
 647         }
 648
 649         if ( ! concat(m, buf, n->child, DATESIZ))
 650                 return(0);
 651
 652         m->meta.date = mandoc_a2time
 653                 (MTIME_MDOCDATE | MTIME_CANONICAL, buf);
 654
 655         if (0 == m->meta.date) {
 656                 if ( ! mdoc_nmsg(m, n, MANDOCERR_BADDATE))
 657                         return(0);
 658                 m->meta.date = time(NULL);
 659         }
 660
 661         return(post_prol(m, n));
 662 }
 663
 664
 665 /*
 666  * Remove prologue macros from the document after they're processed.
 667  * The final document uses mdoc_meta for these values and discards the
 668  * originals.
 669  */
 670 static int
 671 post_prol(POST_ARGS)
 672 {
 673
 674         mdoc_node_delete(m, n);
 675         if (m->meta.title && m->meta.date && m->meta.os)
 676                 m->flags |= MDOC_PBODY;
 677         return(1);
 678 }