mdoc_validate.c

   1 /*      $Id: mdoc_validate.c,v 1.115 2010/08/20 01:02:07 schwarze 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 #include <sys/types.h>
  22
  23 #include <assert.h>
  24 #include <ctype.h>
  25 #include <limits.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "mandoc.h"
  31 #include "libmdoc.h"
  32 #include "libmandoc.h"
  33
  34 /* FIXME: .Bl -diag can't have non-text children in HEAD. */
  35
  36 #define PRE_ARGS  struct mdoc *mdoc, struct mdoc_node *n
  37 #define POST_ARGS struct mdoc *mdoc
  38
  39 typedef int     (*v_pre)(PRE_ARGS);
  40 typedef int     (*v_post)(POST_ARGS);
  41
  42 struct  valids {
  43         v_pre   *pre;
  44         v_post  *post;
  45 };
  46
  47 static  int      check_parent(PRE_ARGS, enum mdoct, enum mdoc_type);
  48 static  int      check_stdarg(PRE_ARGS);
  49 static  int      check_text(struct mdoc *, int, int, char *);
  50 static  int      check_argv(struct mdoc *,
  51                         struct mdoc_node *, struct mdoc_argv *);
  52 static  int      check_args(struct mdoc *, struct mdoc_node *);
  53 static  int      err_child_lt(struct mdoc *, const char *, int);
  54 static  int      warn_child_lt(struct mdoc *, const char *, int);
  55 static  int      err_child_gt(struct mdoc *, const char *, int);
  56 static  int      warn_child_gt(struct mdoc *, const char *, int);
  57 static  int      err_child_eq(struct mdoc *, const char *, int);
  58 static  int      warn_child_eq(struct mdoc *, const char *, int);
  59 static  int      warn_count(struct mdoc *, const char *,
  60                         int, const char *, int);
  61 static  int      err_count(struct mdoc *, const char *,
  62                         int, const char *, int);
  63
  64 static  int      berr_ge1(POST_ARGS);
  65 static  int      bwarn_ge1(POST_ARGS);
  66 static  int      ebool(POST_ARGS);
  67 static  int      eerr_eq0(POST_ARGS);
  68 static  int      eerr_eq1(POST_ARGS);
  69 static  int      eerr_ge1(POST_ARGS);
  70 static  int      eerr_le1(POST_ARGS);
  71 static  int      ewarn_ge1(POST_ARGS);
  72 static  int      herr_eq0(POST_ARGS);
  73 static  int      herr_ge1(POST_ARGS);
  74 static  int      hwarn_eq1(POST_ARGS);
  75 static  int      hwarn_eq0(POST_ARGS);
  76 static  int      hwarn_le1(POST_ARGS);
  77
  78 static  int      post_an(POST_ARGS);
  79 static  int      post_at(POST_ARGS);
  80 static  int      post_bf(POST_ARGS);
  81 static  int      post_bl(POST_ARGS);
  82 static  int      post_bl_head(POST_ARGS);
  83 static  int      post_dt(POST_ARGS);
  84 static  int      post_it(POST_ARGS);
  85 static  int      post_lb(POST_ARGS);
  86 static  int      post_nm(POST_ARGS);
  87 static  int      post_root(POST_ARGS);
  88 static  int      post_rs(POST_ARGS);
  89 static  int      post_sh(POST_ARGS);
  90 static  int      post_sh_body(POST_ARGS);
  91 static  int      post_sh_head(POST_ARGS);
  92 static  int      post_st(POST_ARGS);
  93 static  int      post_eoln(POST_ARGS);
  94 static  int      post_vt(POST_ARGS);
  95 static  int      pre_an(PRE_ARGS);
  96 static  int      pre_bd(PRE_ARGS);
  97 static  int      pre_bl(PRE_ARGS);
  98 static  int      pre_dd(PRE_ARGS);
  99 static  int      pre_display(PRE_ARGS);
 100 static  int      pre_dt(PRE_ARGS);
 101 static  int      pre_it(PRE_ARGS);
 102 static  int      pre_os(PRE_ARGS);
 103 static  int      pre_rv(PRE_ARGS);
 104 static  int      pre_sh(PRE_ARGS);
 105 static  int      pre_ss(PRE_ARGS);
 106
 107 static  v_post   posts_an[] = { post_an, NULL };
 108 static  v_post   posts_at[] = { post_at, NULL };
 109 static  v_post   posts_bd_bk[] = { hwarn_eq0, bwarn_ge1, NULL };
 110 static  v_post   posts_bf[] = { hwarn_le1, post_bf, NULL };
 111 static  v_post   posts_bl[] = { bwarn_ge1, post_bl, NULL };
 112 static  v_post   posts_bool[] = { eerr_eq1, ebool, NULL };
 113 static  v_post   posts_eoln[] = { post_eoln, NULL };
 114 static  v_post   posts_dt[] = { post_dt, NULL };
 115 static  v_post   posts_fo[] = { hwarn_eq1, bwarn_ge1, NULL };
 116 static  v_post   posts_it[] = { post_it, NULL };
 117 static  v_post   posts_lb[] = { eerr_eq1, post_lb, NULL };
 118 static  v_post   posts_nd[] = { berr_ge1, NULL };
 119 static  v_post   posts_nm[] = { post_nm, NULL };
 120 static  v_post   posts_notext[] = { eerr_eq0, NULL };
 121 static  v_post   posts_rs[] = { berr_ge1, herr_eq0, post_rs, NULL };
 122 static  v_post   posts_sh[] = { herr_ge1, bwarn_ge1, post_sh, NULL };
 123 static  v_post   posts_sp[] = { eerr_le1, NULL };
 124 static  v_post   posts_ss[] = { herr_ge1, NULL };
 125 static  v_post   posts_st[] = { eerr_eq1, post_st, NULL };
 126 static  v_post   posts_text[] = { eerr_ge1, NULL };
 127 static  v_post   posts_text1[] = { eerr_eq1, NULL };
 128 static  v_post   posts_vt[] = { post_vt, NULL };
 129 static  v_post   posts_wline[] = { bwarn_ge1, herr_eq0, NULL };
 130 static  v_post   posts_wtext[] = { ewarn_ge1, NULL };
 131 static  v_pre    pres_an[] = { pre_an, NULL };
 132 static  v_pre    pres_bd[] = { pre_display, pre_bd, NULL };
 133 static  v_pre    pres_bl[] = { pre_bl, NULL };
 134 static  v_pre    pres_d1[] = { pre_display, NULL };
 135 static  v_pre    pres_dd[] = { pre_dd, NULL };
 136 static  v_pre    pres_dt[] = { pre_dt, NULL };
 137 static  v_pre    pres_er[] = { NULL, NULL };
 138 static  v_pre    pres_ex[] = { NULL, NULL };
 139 static  v_pre    pres_fd[] = { NULL, NULL };
 140 static  v_pre    pres_it[] = { pre_it, NULL };
 141 static  v_pre    pres_os[] = { pre_os, NULL };
 142 static  v_pre    pres_rv[] = { pre_rv, NULL };
 143 static  v_pre    pres_sh[] = { pre_sh, NULL };
 144 static  v_pre    pres_ss[] = { pre_ss, NULL };
 145
 146 const   struct valids mdoc_valids[MDOC_MAX] = {
 147         { NULL, NULL },                         /* Ap */
 148         { pres_dd, posts_wtext },               /* Dd */
 149         { pres_dt, posts_dt },                  /* Dt */
 150         { pres_os, NULL },                      /* Os */
 151         { pres_sh, posts_sh },                  /* Sh */
 152         { pres_ss, posts_ss },                  /* Ss */
 153         { NULL, posts_notext },                 /* Pp */
 154         { pres_d1, posts_wline },               /* D1 */
 155         { pres_d1, posts_wline },               /* Dl */
 156         { pres_bd, posts_bd_bk },               /* Bd */
 157         { NULL, NULL },                         /* Ed */
 158         { pres_bl, posts_bl },                  /* Bl */
 159         { NULL, NULL },                         /* El */
 160         { pres_it, posts_it },                  /* It */
 161         { NULL, posts_text },                   /* Ad */
 162         { pres_an, posts_an },                  /* An */
 163         { NULL, NULL },                         /* Ar */
 164         { NULL, posts_text },                   /* Cd */
 165         { NULL, NULL },                         /* Cm */
 166         { NULL, NULL },                         /* Dv */
 167         { pres_er, posts_text },                /* Er */
 168         { NULL, NULL },                         /* Ev */
 169         { pres_ex, NULL },                      /* Ex */
 170         { NULL, NULL },                         /* Fa */
 171         { pres_fd, posts_wtext },               /* Fd */
 172         { NULL, NULL },                         /* Fl */
 173         { NULL, posts_text },                   /* Fn */
 174         { NULL, posts_wtext },                  /* Ft */
 175         { NULL, posts_text },                   /* Ic */
 176         { NULL, posts_text1 },                  /* In */
 177         { NULL, NULL },                         /* Li */
 178         { NULL, posts_nd },                     /* Nd */
 179         { NULL, posts_nm },                     /* Nm */
 180         { NULL, posts_wline },                  /* Op */
 181         { NULL, NULL },                         /* Ot */
 182         { NULL, NULL },                         /* Pa */
 183         { pres_rv, NULL },                      /* Rv */
 184         { NULL, posts_st },                     /* St */
 185         { NULL, NULL },                         /* Va */
 186         { NULL, posts_vt },                     /* Vt */
 187         { NULL, posts_wtext },                  /* Xr */
 188         { NULL, posts_text },                   /* %A */
 189         { NULL, posts_text },                   /* %B */ /* FIXME: can be used outside Rs/Re. */
 190         { NULL, posts_text },                   /* %D */ /* FIXME: check date with mandoc_a2time(). */
 191         { NULL, posts_text },                   /* %I */
 192         { NULL, posts_text },                   /* %J */
 193         { NULL, posts_text },                   /* %N */
 194         { NULL, posts_text },                   /* %O */
 195         { NULL, posts_text },                   /* %P */
 196         { NULL, posts_text },                   /* %R */
 197         { NULL, posts_text },                   /* %T */ /* FIXME: can be used outside Rs/Re. */
 198         { NULL, posts_text },                   /* %V */
 199         { NULL, NULL },                         /* Ac */
 200         { NULL, NULL },                         /* Ao */
 201         { NULL, posts_wline },                  /* Aq */
 202         { NULL, posts_at },                     /* At */
 203         { NULL, NULL },                         /* Bc */
 204         { NULL, posts_bf },                     /* Bf */
 205         { NULL, NULL },                         /* Bo */
 206         { NULL, posts_wline },                  /* Bq */
 207         { NULL, NULL },                         /* Bsx */
 208         { NULL, NULL },                         /* Bx */
 209         { NULL, posts_bool },                   /* Db */
 210         { NULL, NULL },                         /* Dc */
 211         { NULL, NULL },                         /* Do */
 212         { NULL, posts_wline },                  /* Dq */
 213         { NULL, NULL },                         /* Ec */
 214         { NULL, NULL },                         /* Ef */
 215         { NULL, NULL },                         /* Em */
 216         { NULL, NULL },                         /* Eo */
 217         { NULL, NULL },                         /* Fx */
 218         { NULL, posts_text },                   /* Ms */
 219         { NULL, posts_notext },                 /* No */
 220         { NULL, posts_notext },                 /* Ns */
 221         { NULL, NULL },                         /* Nx */
 222         { NULL, NULL },                         /* Ox */
 223         { NULL, NULL },                         /* Pc */
 224         { NULL, posts_text1 },                  /* Pf */
 225         { NULL, NULL },                         /* Po */
 226         { NULL, posts_wline },                  /* Pq */
 227         { NULL, NULL },                         /* Qc */
 228         { NULL, posts_wline },                  /* Ql */
 229         { NULL, NULL },                         /* Qo */
 230         { NULL, posts_wline },                  /* Qq */
 231         { NULL, NULL },                         /* Re */
 232         { NULL, posts_rs },                     /* Rs */
 233         { NULL, NULL },                         /* Sc */
 234         { NULL, NULL },                         /* So */
 235         { NULL, posts_wline },                  /* Sq */
 236         { NULL, posts_bool },                   /* Sm */
 237         { NULL, posts_text },                   /* Sx */
 238         { NULL, posts_text },                   /* Sy */
 239         { NULL, posts_text },                   /* Tn */
 240         { NULL, NULL },                         /* Ux */
 241         { NULL, NULL },                         /* Xc */
 242         { NULL, NULL },                         /* Xo */
 243         { NULL, posts_fo },                     /* Fo */
 244         { NULL, NULL },                         /* Fc */
 245         { NULL, NULL },                         /* Oo */
 246         { NULL, NULL },                         /* Oc */
 247         { NULL, posts_bd_bk },                  /* Bk */
 248         { NULL, NULL },                         /* Ek */
 249         { NULL, posts_eoln },                   /* Bt */
 250         { NULL, NULL },                         /* Hf */
 251         { NULL, NULL },                         /* Fr */
 252         { NULL, posts_eoln },                   /* Ud */
 253         { NULL, posts_lb },                     /* Lb */
 254         { NULL, posts_notext },                 /* Lp */
 255         { NULL, posts_text },                   /* Lk */
 256         { NULL, posts_text },                   /* Mt */
 257         { NULL, posts_wline },                  /* Brq */
 258         { NULL, NULL },                         /* Bro */
 259         { NULL, NULL },                         /* Brc */
 260         { NULL, posts_text },                   /* %C */
 261         { NULL, NULL },                         /* Es */
 262         { NULL, NULL },                         /* En */
 263         { NULL, NULL },                         /* Dx */
 264         { NULL, posts_text },                   /* %Q */
 265         { NULL, posts_notext },                 /* br */
 266         { NULL, posts_sp },                     /* sp */
 267         { NULL, posts_text1 },                  /* %U */
 268         { NULL, NULL },                         /* Ta */
 269 };
 270
 271
 272 int
 273 mdoc_valid_pre(struct mdoc *mdoc, struct mdoc_node *n)
 274 {
 275         v_pre           *p;
 276         int              line, pos;
 277         char            *tp;
 278
 279         if (MDOC_TEXT == n->type) {
 280                 tp = n->string;
 281                 line = n->line;
 282                 pos = n->pos;
 283                 return(check_text(mdoc, line, pos, tp));
 284         }
 285
 286         if ( ! check_args(mdoc, n))
 287                 return(0);
 288         if (NULL == mdoc_valids[n->tok].pre)
 289                 return(1);
 290         for (p = mdoc_valids[n->tok].pre; *p; p++)
 291                 if ( ! (*p)(mdoc, n))
 292                         return(0);
 293         return(1);
 294 }
 295
 296
 297 int
 298 mdoc_valid_post(struct mdoc *mdoc)
 299 {
 300         v_post          *p;
 301
 302         if (MDOC_VALID & mdoc->last->flags)
 303                 return(1);
 304         mdoc->last->flags |= MDOC_VALID;
 305
 306         if (MDOC_TEXT == mdoc->last->type)
 307                 return(1);
 308         if (MDOC_ROOT == mdoc->last->type)
 309                 return(post_root(mdoc));
 310
 311         if (NULL == mdoc_valids[mdoc->last->tok].post)
 312                 return(1);
 313         for (p = mdoc_valids[mdoc->last->tok].post; *p; p++)
 314                 if ( ! (*p)(mdoc))
 315                         return(0);
 316
 317         return(1);
 318 }
 319
 320
 321 static inline int
 322 warn_count(struct mdoc *m, const char *k,
 323                 int want, const char *v, int has)
 324 {
 325
 326         return(mdoc_vmsg(m, MANDOCERR_ARGCOUNT,
 327                                 m->last->line, m->last->pos,
 328                                 "%s %s %d (have %d)", v, k, want, has));
 329 }
 330
 331
 332 static inline int
 333 err_count(struct mdoc *m, const char *k,
 334                 int want, const char *v, int has)
 335 {
 336
 337         mdoc_vmsg(m, MANDOCERR_SYNTARGCOUNT,
 338                         m->last->line, m->last->pos,
 339                         "%s %s %d (have %d)",
 340                         v, k, want, has);
 341         return(0);
 342 }
 343
 344
 345 /*
 346  * Build these up with macros because they're basically the same check
 347  * for different inequalities.  Yes, this could be done with functions,
 348  * but this is reasonable for now.
 349  */
 350
 351 #define CHECK_CHILD_DEFN(lvl, name, ineq)                       \
 352 static int                                                      \
 353 lvl##_child_##name(struct mdoc *mdoc, const char *p, int sz)    \
 354 {                                                               \
 355         if (mdoc->last->nchild ineq sz)                         \
 356                 return(1);                                      \
 357         return(lvl##_count(mdoc, #ineq, sz, p, mdoc->last->nchild)); \
 358 }
 359
 360 #define CHECK_BODY_DEFN(name, lvl, func, num)                   \
 361 static int                                                      \
 362 b##lvl##_##name(POST_ARGS)                                      \
 363 {                                                               \
 364         if (MDOC_BODY != mdoc->last->type)                      \
 365                 return(1);                                      \
 366         return(func(mdoc, "multi-line arguments", (num)));      \
 367 }
 368
 369 #define CHECK_ELEM_DEFN(name, lvl, func, num)                   \
 370 static int                                                      \
 371 e##lvl##_##name(POST_ARGS)                                      \
 372 {                                                               \
 373         assert(MDOC_ELEM == mdoc->last->type);                  \
 374         return(func(mdoc, "line arguments", (num)));            \
 375 }
 376
 377 #define CHECK_HEAD_DEFN(name, lvl, func, num)                   \
 378 static int                                                      \
 379 h##lvl##_##name(POST_ARGS)                                      \
 380 {                                                               \
 381         if (MDOC_HEAD != mdoc->last->type)                      \
 382                 return(1);                                      \
 383         return(func(mdoc, "line arguments", (num)));            \
 384 }
 385
 386
 387 CHECK_CHILD_DEFN(warn, gt, >)                   /* warn_child_gt() */
 388 CHECK_CHILD_DEFN(err, gt, >)                    /* err_child_gt() */
 389 CHECK_CHILD_DEFN(warn, eq, ==)                  /* warn_child_eq() */
 390 CHECK_CHILD_DEFN(err, eq, ==)                   /* err_child_eq() */
 391 CHECK_CHILD_DEFN(err, lt, <)                    /* err_child_lt() */
 392 CHECK_CHILD_DEFN(warn, lt, <)                   /* warn_child_lt() */
 393 CHECK_BODY_DEFN(ge1, warn, warn_child_gt, 0)    /* bwarn_ge1() */
 394 CHECK_BODY_DEFN(ge1, err, err_child_gt, 0)      /* berr_ge1() */
 395 CHECK_ELEM_DEFN(ge1, warn, warn_child_gt, 0)    /* ewarn_ge1() */
 396 CHECK_ELEM_DEFN(eq1, err, err_child_eq, 1)      /* eerr_eq1() */
 397 CHECK_ELEM_DEFN(le1, err, err_child_lt, 2)      /* eerr_le1() */
 398 CHECK_ELEM_DEFN(eq0, err, err_child_eq, 0)      /* eerr_eq0() */
 399 CHECK_ELEM_DEFN(ge1, err, err_child_gt, 0)      /* eerr_ge1() */
 400 CHECK_HEAD_DEFN(eq0, err, err_child_eq, 0)      /* herr_eq0() */
 401 CHECK_HEAD_DEFN(le1, warn, warn_child_lt, 2)    /* hwarn_le1() */
 402 CHECK_HEAD_DEFN(ge1, err, err_child_gt, 0)      /* herr_ge1() */
 403 CHECK_HEAD_DEFN(eq1, warn, warn_child_eq, 1)    /* hwarn_eq1() */
 404 CHECK_HEAD_DEFN(eq0, warn, warn_child_eq, 0)    /* hwarn_eq0() */
 405
 406
 407 static int
 408 check_stdarg(PRE_ARGS)
 409 {
 410
 411         if (n->args && 1 == n->args->argc)
 412                 if (MDOC_Std == n->args->argv[0].arg)
 413                         return(1);
 414         return(mdoc_nmsg(mdoc, n, MANDOCERR_NOARGV));
 415 }
 416
 417
 418 static int
 419 check_args(struct mdoc *m, struct mdoc_node *n)
 420 {
 421         int              i;
 422
 423         if (NULL == n->args)
 424                 return(1);
 425
 426         assert(n->args->argc);
 427         for (i = 0; i < (int)n->args->argc; i++)
 428                 if ( ! check_argv(m, n, &n->args->argv[i]))
 429                         return(0);
 430
 431         return(1);
 432 }
 433
 434
 435 static int
 436 check_argv(struct mdoc *m, struct mdoc_node *n, struct mdoc_argv *v)
 437 {
 438         int              i;
 439
 440         for (i = 0; i < (int)v->sz; i++)
 441                 if ( ! check_text(m, v->line, v->pos, v->value[i]))
 442                         return(0);
 443
 444         if (MDOC_Std == v->arg) {
 445                 if (v->sz || m->meta.name)
 446                         return(1);
 447                 if ( ! mdoc_nmsg(m, n, MANDOCERR_NONAME))
 448                         return(0);
 449         }
 450
 451         return(1);
 452 }
 453
 454
 455 static int
 456 check_text(struct mdoc *m, int ln, int pos, char *p)
 457 {
 458         int              c;
 459         size_t           sz;
 460
 461         for ( ; *p; p++, pos++) {
 462                 sz = strcspn(p, "\t\\");
 463                 p += (int)sz;
 464
 465                 if ('\0' == *p)
 466                         break;
 467
 468                 pos += (int)sz;
 469
 470                 if ('\t' == *p) {
 471                         if (MDOC_LITERAL & m->flags)
 472                                 continue;
 473                         if (mdoc_pmsg(m, ln, pos, MANDOCERR_BADTAB))
 474                                 continue;
 475                         return(0);
 476                 }
 477
 478                 /* Check the special character. */
 479
 480                 c = mandoc_special(p);
 481                 if (c) {
 482                         p += c - 1;
 483                         pos += c - 1;
 484                 } else
 485                         mdoc_pmsg(m, ln, pos, MANDOCERR_BADESCAPE);
 486         }
 487
 488         return(1);
 489 }
 490
 491
 492 static int
 493 check_parent(PRE_ARGS, enum mdoct tok, enum mdoc_type t)
 494 {
 495
 496         assert(n->parent);
 497         if ((MDOC_ROOT == t || tok == n->parent->tok) &&
 498                         (t == n->parent->type))
 499                 return(1);
 500
 501         mdoc_vmsg(mdoc, MANDOCERR_SYNTCHILD,
 502                                 n->line, n->pos, "want parent %s",
 503                                 MDOC_ROOT == t ? "<root>" :
 504                                         mdoc_macronames[tok]);
 505         return(0);
 506 }
 507
 508
 509 static int
 510 pre_display(PRE_ARGS)
 511 {
 512         struct mdoc_node *node;
 513
 514         /* Display elements (`Bd', `D1'...) cannot be nested. */
 515
 516         if (MDOC_BLOCK != n->type)
 517                 return(1);
 518
 519         /* LINTED */
 520         for (node = mdoc->last->parent; node; node = node->parent)
 521                 if (MDOC_BLOCK == node->type)
 522                         if (MDOC_Bd == node->tok)
 523                                 break;
 524         if (NULL == node)
 525                 return(1);
 526
 527         mdoc_nmsg(mdoc, n, MANDOCERR_NESTEDDISP);
 528         return(0);
 529 }
 530
 531
 532 static int
 533 pre_bl(PRE_ARGS)
 534 {
 535         int               i, comp, dup;
 536         const char       *offs, *width;
 537         enum mdoc_list    lt;
 538         struct mdoc_node *np;
 539
 540         if (MDOC_BLOCK != n->type) {
 541                 if (ENDBODY_NOT != n->end) {
 542                         assert(n->pending);
 543                         np = n->pending->parent;
 544                 } else
 545                         np = n->parent;
 546
 547                 assert(np);
 548                 assert(MDOC_BLOCK == np->type);
 549                 assert(MDOC_Bl == np->tok);
 550                 assert(np->data.Bl);
 551                 n->data.Bl = np->data.Bl;
 552                 return(1);
 553         }
 554
 555         /*
 556          * First figure out which kind of list to use: bind ourselves to
 557          * the first mentioned list type and warn about any remaining
 558          * ones.  If we find no list type, we default to LIST_item.
 559          */
 560
 561         assert(NULL == n->data.Bl);
 562         n->data.Bl = mandoc_calloc(1, sizeof(struct mdoc_bl));
 563
 564         /* LINTED */
 565         for (i = 0; n->args && i < (int)n->args->argc; i++) {
 566                 lt = LIST__NONE;
 567                 dup = comp = 0;
 568                 width = offs = NULL;
 569                 switch (n->args->argv[i].arg) {
 570                 /* Set list types. */
 571                 case (MDOC_Bullet):
 572                         lt = LIST_bullet;
 573                         break;
 574                 case (MDOC_Dash):
 575                         lt = LIST_dash;
 576                         break;
 577                 case (MDOC_Enum):
 578                         lt = LIST_enum;
 579                         break;
 580                 case (MDOC_Hyphen):
 581                         lt = LIST_hyphen;
 582                         break;
 583                 case (MDOC_Item):
 584                         lt = LIST_item;
 585                         break;
 586                 case (MDOC_Tag):
 587                         lt = LIST_tag;
 588                         break;
 589                 case (MDOC_Diag):
 590                         lt = LIST_diag;
 591                         break;
 592                 case (MDOC_Hang):
 593                         lt = LIST_hang;
 594                         break;
 595                 case (MDOC_Ohang):
 596                         lt = LIST_ohang;
 597                         break;
 598                 case (MDOC_Inset):
 599                         lt = LIST_inset;
 600                         break;
 601                 case (MDOC_Column):
 602                         lt = LIST_column;
 603                         break;
 604                 /* Set list arguments. */
 605                 case (MDOC_Compact):
 606                         dup = n->data.Bl->comp;
 607                         comp = 1;
 608                         break;
 609                 case (MDOC_Width):
 610                         dup = (NULL != n->data.Bl->width);
 611                         width = n->args->argv[i].value[0];
 612                         break;
 613                 case (MDOC_Offset):
 614                         /* NB: this can be empty! */
 615                         if (n->args->argv[i].sz) {
 616                                 offs = n->args->argv[i].value[0];
 617                                 dup = (NULL != n->data.Bl->offs);
 618                                 break;
 619                         }
 620                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_IGNARGV))
 621                                 return(0);
 622                         break;
 623                 default:
 624                         continue;
 625                 }
 626
 627                 /* Check: duplicate auxiliary arguments. */
 628
 629                 if (dup && ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGVREP))
 630                         return(0);
 631
 632                 if (comp && ! dup)
 633                         n->data.Bl->comp = comp;
 634                 if (offs && ! dup)
 635                         n->data.Bl->offs = offs;
 636                 if (width && ! dup)
 637                         n->data.Bl->width = width;
 638
 639                 /* Check: multiple list types. */
 640
 641                 if (LIST__NONE != lt && n->data.Bl->type != LIST__NONE)
 642                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTREP))
 643                                 return(0);
 644
 645                 /* Assign list type. */
 646
 647                 if (LIST__NONE != lt && n->data.Bl->type == LIST__NONE) {
 648                         n->data.Bl->type = lt;
 649                         /* Set column information, too. */
 650                         if (LIST_column == lt) {
 651                                 n->data.Bl->ncols =
 652                                         n->args->argv[i].sz;
 653                                 n->data.Bl->cols = (const char **)
 654                                         n->args->argv[i].value;
 655                         }
 656                 }
 657
 658                 /* The list type should come first. */
 659
 660                 if (n->data.Bl->type == LIST__NONE)
 661                         if (n->data.Bl->width ||
 662                                         n->data.Bl->offs ||
 663                                         n->data.Bl->comp)
 664                                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTFIRST))
 665                                         return(0);
 666
 667                 continue;
 668         }
 669
 670         /* Allow lists to default to LIST_item. */
 671
 672         if (LIST__NONE == n->data.Bl->type) {
 673                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTTYPE))
 674                         return(0);
 675                 n->data.Bl->type = LIST_item;
 676         }
 677
 678         /*
 679          * Validate the width field.  Some list types don't need width
 680          * types and should be warned about them.  Others should have it
 681          * and must also be warned.
 682          */
 683
 684         switch (n->data.Bl->type) {
 685         case (LIST_tag):
 686                 if (n->data.Bl->width)
 687                         break;
 688                 if (mdoc_nmsg(mdoc, n, MANDOCERR_NOWIDTHARG))
 689                         break;
 690                 return(0);
 691         case (LIST_column):
 692                 /* FALLTHROUGH */
 693         case (LIST_diag):
 694                 /* FALLTHROUGH */
 695         case (LIST_ohang):
 696                 /* FALLTHROUGH */
 697         case (LIST_inset):
 698                 /* FALLTHROUGH */
 699         case (LIST_item):
 700                 if (NULL == n->data.Bl->width)
 701                         break;
 702                 if (mdoc_nmsg(mdoc, n, MANDOCERR_WIDTHARG))
 703                         break;
 704                 return(0);
 705         default:
 706                 break;
 707         }
 708
 709         return(1);
 710 }
 711
 712
 713 static int
 714 pre_bd(PRE_ARGS)
 715 {
 716         int               i, dup, comp;
 717         enum mdoc_disp    dt;
 718         const char       *offs;
 719         struct mdoc_node *np;
 720
 721         if (MDOC_BLOCK != n->type) {
 722                 if (ENDBODY_NOT != n->end) {
 723                         assert(n->pending);
 724                         np = n->pending->parent;
 725                 } else
 726                         np = n->parent;
 727
 728                 assert(np);
 729                 assert(MDOC_BLOCK == np->type);
 730                 assert(MDOC_Bd == np->tok);
 731                 assert(np->data.Bd);
 732                 n->data.Bd = np->data.Bd;
 733                 return(1);
 734         }
 735
 736         assert(NULL == n->data.Bd);
 737         n->data.Bd = mandoc_calloc(1, sizeof(struct mdoc_bd));
 738
 739         /* LINTED */
 740         for (i = 0; n->args && i < (int)n->args->argc; i++) {
 741                 dt = DISP__NONE;
 742                 dup = comp = 0;
 743                 offs = NULL;
 744
 745                 switch (n->args->argv[i].arg) {
 746                 case (MDOC_Centred):
 747                         dt = DISP_centred;
 748                         break;
 749                 case (MDOC_Ragged):
 750                         dt = DISP_ragged;
 751                         break;
 752                 case (MDOC_Unfilled):
 753                         dt = DISP_unfilled;
 754                         break;
 755                 case (MDOC_Filled):
 756                         dt = DISP_filled;
 757                         break;
 758                 case (MDOC_Literal):
 759                         dt = DISP_literal;
 760                         break;
 761                 case (MDOC_File):
 762                         mdoc_nmsg(mdoc, n, MANDOCERR_BADDISP);
 763                         return(0);
 764                 case (MDOC_Offset):
 765                         /* NB: this can be empty! */
 766                         if (n->args->argv[i].sz) {
 767                                 offs = n->args->argv[i].value[0];
 768                                 dup = (NULL != n->data.Bd->offs);
 769                                 break;
 770                         }
 771                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_IGNARGV))
 772                                 return(0);
 773                         break;
 774                 case (MDOC_Compact):
 775                         comp = 1;
 776                         dup = n->data.Bd->comp;
 777                         break;
 778                 default:
 779                         abort();
 780                         /* NOTREACHED */
 781                 }
 782
 783                 /* Check whether we have duplicates. */
 784
 785                 if (dup && ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGVREP))
 786                         return(0);
 787
 788                 /* Make our auxiliary assignments. */
 789
 790                 if (offs && ! dup)
 791                         n->data.Bd->offs = offs;
 792                 if (comp && ! dup)
 793                         n->data.Bd->comp = comp;
 794
 795                 /* Check whether a type has already been assigned. */
 796
 797                 if (DISP__NONE != dt && n->data.Bd->type != DISP__NONE)
 798                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_DISPREP))
 799                                 return(0);
 800
 801                 /* Make our type assignment. */
 802
 803                 if (DISP__NONE != dt && n->data.Bd->type == DISP__NONE)
 804                         n->data.Bd->type = dt;
 805         }
 806
 807         if (DISP__NONE == n->data.Bd->type) {
 808                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_DISPTYPE))
 809                         return(0);
 810                 n->data.Bd->type = DISP_ragged;
 811         }
 812
 813         return(1);
 814 }
 815
 816
 817 static int
 818 pre_ss(PRE_ARGS)
 819 {
 820
 821         if (MDOC_BLOCK != n->type)
 822                 return(1);
 823         return(check_parent(mdoc, n, MDOC_Sh, MDOC_BODY));
 824 }
 825
 826
 827 static int
 828 pre_sh(PRE_ARGS)
 829 {
 830
 831         if (MDOC_BLOCK != n->type)
 832                 return(1);
 833
 834         mdoc->regs->regs[(int)REG_nS].set = 0;
 835         return(check_parent(mdoc, n, MDOC_MAX, MDOC_ROOT));
 836 }
 837
 838
 839 static int
 840 pre_it(PRE_ARGS)
 841 {
 842
 843         if (MDOC_BLOCK != n->type)
 844                 return(1);
 845         /*
 846          * FIXME: this can probably be lifted if we make the It into
 847          * something else on-the-fly?
 848          */
 849         return(check_parent(mdoc, n, MDOC_Bl, MDOC_BODY));
 850 }
 851
 852
 853 static int
 854 pre_an(PRE_ARGS)
 855 {
 856
 857         if (NULL == n->args)
 858                 return(1);
 859         if (n->args->argc > 1)
 860                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGCOUNT))
 861                         return(0);
 862
 863         if (MDOC_Split == n->args->argv[0].arg)
 864                 n->data.An.auth = AUTH_split;
 865         else if (MDOC_Nosplit == n->args->argv[0].arg)
 866                 n->data.An.auth = AUTH_nosplit;
 867         else
 868                 abort();
 869
 870         return(1);
 871 }
 872
 873
 874 static int
 875 pre_rv(PRE_ARGS)
 876 {
 877
 878         return(check_stdarg(mdoc, n));
 879 }
 880
 881
 882 static int
 883 post_dt(POST_ARGS)
 884 {
 885         const struct mdoc_node *nn;
 886         const char      *p;
 887
 888         if (NULL != (nn = mdoc->last->child))
 889                 for (p = nn->string; *p; p++) {
 890                         if (toupper((u_char)*p) == *p)
 891                                 continue;
 892                         if ( ! mdoc_nmsg(mdoc, nn, MANDOCERR_UPPERCASE))
 893                                 return(0);
 894                         break;
 895                 }
 896
 897         return(1);
 898 }
 899
 900
 901 static int
 902 pre_dt(PRE_ARGS)
 903 {
 904
 905         if (0 == mdoc->meta.date || mdoc->meta.os)
 906                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 907                         return(0);
 908         if (mdoc->meta.title)
 909                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 910                         return(0);
 911         return(1);
 912 }
 913
 914
 915 static int
 916 pre_os(PRE_ARGS)
 917 {
 918
 919         if (NULL == mdoc->meta.title || 0 == mdoc->meta.date)
 920                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 921                         return(0);
 922         if (mdoc->meta.os)
 923                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 924                         return(0);
 925         return(1);
 926 }
 927
 928
 929 static int
 930 pre_dd(PRE_ARGS)
 931 {
 932
 933         if (mdoc->meta.title || mdoc->meta.os)
 934                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 935                         return(0);
 936         if (mdoc->meta.date)
 937                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 938                         return(0);
 939         return(1);
 940 }
 941
 942
 943 static int
 944 post_bf(POST_ARGS)
 945 {
 946         struct mdoc_node *np;
 947         enum mdocargt     arg;
 948
 949         /*
 950          * Unlike other data pointers, these are "housed" by the HEAD
 951          * element, which contains the goods.
 952          */
 953
 954         if (MDOC_HEAD != mdoc->last->type) {
 955                 if (ENDBODY_NOT != mdoc->last->end) {
 956                         assert(mdoc->last->pending);
 957                         np = mdoc->last->pending->parent->head;
 958                 } else if (MDOC_BLOCK != mdoc->last->type) {
 959                         np = mdoc->last->parent->head;
 960                 } else
 961                         np = mdoc->last->head;
 962
 963                 assert(np);
 964                 assert(MDOC_HEAD == np->type);
 965                 assert(MDOC_Bf == np->tok);
 966                 assert(np->data.Bf);
 967                 mdoc->last->data.Bf = np->data.Bf;
 968                 return(1);
 969         }
 970
 971         np = mdoc->last;
 972         assert(MDOC_BLOCK == np->parent->type);
 973         assert(MDOC_Bf == np->parent->tok);
 974         np->data.Bf = mandoc_calloc(1, sizeof(struct mdoc_bf));
 975
 976         /*
 977          * Cannot have both argument and parameter.
 978          * If neither is specified, let it through with a warning.
 979          */
 980
 981         if (np->parent->args && np->child) {
 982                 mdoc_nmsg(mdoc, np, MANDOCERR_SYNTARGVCOUNT);
 983                 return(0);
 984         } else if (NULL == np->parent->args && NULL == np->child)
 985                 return(mdoc_nmsg(mdoc, np, MANDOCERR_FONTTYPE));
 986
 987         /* Extract argument into data. */
 988
 989         if (np->parent->args) {
 990                 arg = np->parent->args->argv[0].arg;
 991                 if (MDOC_Emphasis == arg)
 992                         np->data.Bf->font = FONT_Em;
 993                 else if (MDOC_Literal == arg)
 994                         np->data.Bf->font = FONT_Li;
 995                 else if (MDOC_Symbolic == arg)
 996                         np->data.Bf->font = FONT_Sy;
 997                 else
 998                         abort();
 999                 return(1);
1000         }
1001
1002         /* Extract parameter into data. */
1003
1004         if (0 == strcmp(np->child->string, "Em"))
1005                 np->data.Bf->font = FONT_Em;
1006         else if (0 == strcmp(np->child->string, "Li"))
1007                 np->data.Bf->font = FONT_Li;
1008         else if (0 == strcmp(np->child->string, "Sy"))
1009                 np->data.Bf->font = FONT_Sy;
1010         else if ( ! mdoc_nmsg(mdoc, np, MANDOCERR_FONTTYPE))
1011                 return(0);
1012
1013         return(1);
1014 }
1015
1016
1017 static int
1018 post_lb(POST_ARGS)
1019 {
1020
1021         if (mdoc_a2lib(mdoc->last->child->string))
1022                 return(1);
1023         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADLIB));
1024 }
1025
1026
1027 static int
1028 post_eoln(POST_ARGS)
1029 {
1030
1031         if (NULL == mdoc->last->child)
1032                 return(1);
1033         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGSLOST));
1034 }
1035
1036
1037 static int
1038 post_vt(POST_ARGS)
1039 {
1040         const struct mdoc_node *n;
1041
1042         /*
1043          * The Vt macro comes in both ELEM and BLOCK form, both of which
1044          * have different syntaxes (yet more context-sensitive
1045          * behaviour).  ELEM types must have a child; BLOCK types,
1046          * specifically the BODY, should only have TEXT children.
1047          */
1048
1049         if (MDOC_ELEM == mdoc->last->type)
1050                 return(eerr_ge1(mdoc));
1051         if (MDOC_BODY != mdoc->last->type)
1052                 return(1);
1053
1054         for (n = mdoc->last->child; n; n = n->next)
1055                 if (MDOC_TEXT != n->type)
1056                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_CHILD))
1057                                 return(0);
1058
1059         return(1);
1060 }
1061
1062
1063 static int
1064 post_nm(POST_ARGS)
1065 {
1066
1067         if (mdoc->last->child)
1068                 return(1);
1069         if (mdoc->meta.name)
1070                 return(1);
1071         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NONAME));
1072 }
1073
1074
1075 static int
1076 post_at(POST_ARGS)
1077 {
1078
1079         if (NULL == mdoc->last->child)
1080                 return(1);
1081         assert(MDOC_TEXT == mdoc->last->child->type);
1082         if (mdoc_a2att(mdoc->last->child->string))
1083                 return(1);
1084         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADATT));
1085 }
1086
1087
1088 static int
1089 post_an(POST_ARGS)
1090 {
1091         struct mdoc_node *np;
1092
1093         np = mdoc->last;
1094         if (AUTH__NONE != np->data.An.auth && np->child)
1095                 return(mdoc_nmsg(mdoc, np, MANDOCERR_ARGCOUNT));
1096         if (AUTH__NONE != np->data.An.auth || np->child)
1097                 return(1);
1098         return(mdoc_nmsg(mdoc, np, MANDOCERR_NOARGS));
1099 }
1100
1101
1102 static int
1103 post_it(POST_ARGS)
1104 {
1105         int               i, cols, rc;
1106         enum mdoc_list    lt;
1107         struct mdoc_node *n, *c;
1108         enum mandocerr    er;
1109
1110         if (MDOC_BLOCK != mdoc->last->type)
1111                 return(1);
1112
1113         n = mdoc->last->parent->parent;
1114         assert(n->data.Bl);
1115         lt = n->data.Bl->type;
1116
1117         if (LIST__NONE == lt) {
1118                 mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_LISTTYPE);
1119                 return(0);
1120         }
1121
1122         switch (lt) {
1123         case (LIST_tag):
1124                 if (mdoc->last->head->child)
1125                         break;
1126                 /* FIXME: give this a dummy value. */
1127                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS))
1128                         return(0);
1129                 break;
1130         case (LIST_hang):
1131                 /* FALLTHROUGH */
1132         case (LIST_ohang):
1133                 /* FALLTHROUGH */
1134         case (LIST_inset):
1135                 /* FALLTHROUGH */
1136         case (LIST_diag):
1137                 if (NULL == mdoc->last->head->child)
1138                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS))
1139                                 return(0);
1140                 break;
1141         case (LIST_bullet):
1142                 /* FALLTHROUGH */
1143         case (LIST_dash):
1144                 /* FALLTHROUGH */
1145         case (LIST_enum):
1146                 /* FALLTHROUGH */
1147         case (LIST_hyphen):
1148                 if (NULL == mdoc->last->body->child)
1149                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1150                                 return(0);
1151                 /* FALLTHROUGH */
1152         case (LIST_item):
1153                 if (mdoc->last->head->child)
1154                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGSLOST))
1155                                 return(0);
1156                 break;
1157         case (LIST_column):
1158                 cols = (int)n->data.Bl->ncols;
1159
1160                 assert(NULL == mdoc->last->head->child);
1161
1162                 if (NULL == mdoc->last->body->child)
1163                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1164                                 return(0);
1165
1166                 for (i = 0, c = mdoc->last->child; c; c = c->next)
1167                         if (MDOC_BODY == c->type)
1168                                 i++;
1169
1170                 if (i < cols)
1171                         er = MANDOCERR_ARGCOUNT;
1172                 else if (i == cols || i == cols + 1)
1173                         break;
1174                 else
1175                         er = MANDOCERR_SYNTARGCOUNT;
1176
1177                 rc = mdoc_vmsg(mdoc, er,
1178                                 mdoc->last->line, mdoc->last->pos,
1179                                 "columns == %d (have %d)", cols, i);
1180                 return(rc);
1181         default:
1182                 break;
1183         }
1184
1185         return(1);
1186 }
1187
1188
1189 static int
1190 post_bl_head(POST_ARGS)
1191 {
1192         int               i;
1193         struct mdoc_node *n;
1194
1195         assert(mdoc->last->parent);
1196         n = mdoc->last->parent;
1197
1198         if (LIST_column == n->data.Bl->type) {
1199                 if (n->data.Bl->ncols && mdoc->last->nchild) {
1200                         mdoc_nmsg(mdoc, n, MANDOCERR_COLUMNS);
1201                         return(0);
1202                 }
1203                 return(1);
1204         }
1205
1206         if (0 == (i = mdoc->last->nchild))
1207                 return(1);
1208         return(warn_count(mdoc, "==", 0, "line arguments", i));
1209 }
1210
1211
1212 static int
1213 post_bl(POST_ARGS)
1214 {
1215         struct mdoc_node        *n;
1216
1217         if (MDOC_HEAD == mdoc->last->type)
1218                 return(post_bl_head(mdoc));
1219         if (MDOC_BODY != mdoc->last->type)
1220                 return(1);
1221         if (NULL == mdoc->last->child)
1222                 return(1);
1223
1224         /*
1225          * We only allow certain children of `Bl'.  This is usually on
1226          * `It', but apparently `Sm' occurs here and there, so we let
1227          * that one through, too.
1228          */
1229
1230         /* LINTED */
1231         for (n = mdoc->last->child; n; n = n->next) {
1232                 if (MDOC_BLOCK == n->type && MDOC_It == n->tok)
1233                         continue;
1234                 if (MDOC_Sm == n->tok)
1235                         continue;
1236                 mdoc_nmsg(mdoc, n, MANDOCERR_SYNTCHILD);
1237                 return(0);
1238         }
1239
1240         return(1);
1241 }
1242
1243
1244 static int
1245 ebool(struct mdoc *mdoc)
1246 {
1247         struct mdoc_node *n;
1248
1249         /* LINTED */
1250         for (n = mdoc->last->child; n; n = n->next) {
1251                 if (MDOC_TEXT != n->type)
1252                         break;
1253                 if (0 == strcmp(n->string, "on"))
1254                         continue;
1255                 if (0 == strcmp(n->string, "off"))
1256                         continue;
1257                 break;
1258         }
1259
1260         if (NULL == n)
1261                 return(1);
1262         return(mdoc_nmsg(mdoc, n, MANDOCERR_BADBOOL));
1263 }
1264
1265
1266 static int
1267 post_root(POST_ARGS)
1268 {
1269
1270         if (NULL == mdoc->first->child)
1271                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1272         else if ( ! (MDOC_PBODY & mdoc->flags))
1273                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCPROLOG);
1274         else if (MDOC_BLOCK != mdoc->first->child->type)
1275                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1276         else if (MDOC_Sh != mdoc->first->child->tok)
1277                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1278         else
1279                 return(1);
1280
1281         return(0);
1282 }
1283
1284
1285 static int
1286 post_st(POST_ARGS)
1287 {
1288
1289         if (mdoc_a2st(mdoc->last->child->string))
1290                 return(1);
1291         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADSTANDARD));
1292 }
1293
1294
1295 static int
1296 post_rs(POST_ARGS)
1297 {
1298         struct mdoc_node        *nn;
1299
1300         if (MDOC_BODY != mdoc->last->type)
1301                 return(1);
1302
1303         for (nn = mdoc->last->child; nn; nn = nn->next)
1304                 switch (nn->tok) {
1305                 case(MDOC__U):
1306                         /* FALLTHROUGH */
1307                 case(MDOC__Q):
1308                         /* FALLTHROUGH */
1309                 case(MDOC__C):
1310                         /* FALLTHROUGH */
1311                 case(MDOC__A):
1312                         /* FALLTHROUGH */
1313                 case(MDOC__B):
1314                         /* FALLTHROUGH */
1315                 case(MDOC__D):
1316                         /* FALLTHROUGH */
1317                 case(MDOC__I):
1318                         /* FALLTHROUGH */
1319                 case(MDOC__J):
1320                         /* FALLTHROUGH */
1321                 case(MDOC__N):
1322                         /* FALLTHROUGH */
1323                 case(MDOC__O):
1324                         /* FALLTHROUGH */
1325                 case(MDOC__P):
1326                         /* FALLTHROUGH */
1327                 case(MDOC__R):
1328                         /* FALLTHROUGH */
1329                 case(MDOC__T):
1330                         /* FALLTHROUGH */
1331                 case(MDOC__V):
1332                         break;
1333                 default:
1334                         mdoc_nmsg(mdoc, nn, MANDOCERR_SYNTCHILD);
1335                         return(0);
1336                 }
1337
1338         return(1);
1339 }
1340
1341
1342 static int
1343 post_sh(POST_ARGS)
1344 {
1345
1346         if (MDOC_HEAD == mdoc->last->type)
1347                 return(post_sh_head(mdoc));
1348         if (MDOC_BODY == mdoc->last->type)
1349                 return(post_sh_body(mdoc));
1350
1351         return(1);
1352 }
1353
1354
1355 static int
1356 post_sh_body(POST_ARGS)
1357 {
1358         struct mdoc_node *n;
1359
1360         if (SEC_NAME != mdoc->lastsec)
1361                 return(1);
1362
1363         /*
1364          * Warn if the NAME section doesn't contain the `Nm' and `Nd'
1365          * macros (can have multiple `Nm' and one `Nd').  Note that the
1366          * children of the BODY declaration can also be "text".
1367          */
1368
1369         if (NULL == (n = mdoc->last->child))
1370                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC));
1371
1372         for ( ; n && n->next; n = n->next) {
1373                 if (MDOC_ELEM == n->type && MDOC_Nm == n->tok)
1374                         continue;
1375                 if (MDOC_TEXT == n->type)
1376                         continue;
1377                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC))
1378                         return(0);
1379         }
1380
1381         assert(n);
1382         if (MDOC_BLOCK == n->type && MDOC_Nd == n->tok)
1383                 return(1);
1384         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC));
1385 }
1386
1387
1388 static int
1389 post_sh_head(POST_ARGS)
1390 {
1391         char                    buf[BUFSIZ];
1392         enum mdoc_sec           sec;
1393         const struct mdoc_node *n;
1394
1395         /*
1396          * Process a new section.  Sections are either "named" or
1397          * "custom"; custom sections are user-defined, while named ones
1398          * usually follow a conventional order and may only appear in
1399          * certain manual sections.
1400          */
1401
1402         buf[0] = '\0';
1403
1404         /*
1405          * FIXME: yes, these can use a dynamic buffer, but I don't do so
1406          * in the interests of simplicity.
1407          */
1408
1409         for (n = mdoc->last->child; n; n = n->next) {
1410                 /* XXX - copied from compact(). */
1411                 assert(MDOC_TEXT == n->type);
1412
1413                 if (strlcat(buf, n->string, BUFSIZ) >= BUFSIZ) {
1414                         mdoc_nmsg(mdoc, n, MANDOCERR_MEM);
1415                         return(0);
1416                 }
1417                 if (NULL == n->next)
1418                         continue;
1419                 if (strlcat(buf, " ", BUFSIZ) >= BUFSIZ) {
1420                         mdoc_nmsg(mdoc, n, MANDOCERR_MEM);
1421                         return(0);
1422                 }
1423         }
1424
1425         sec = mdoc_str2sec(buf);
1426
1427         /*
1428          * Check: NAME should always be first, CUSTOM has no roles,
1429          * non-CUSTOM has a conventional order to be followed.
1430          */
1431
1432         if (SEC_NAME != sec && SEC_NONE == mdoc->lastnamed)
1433                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NAMESECFIRST))
1434                         return(0);
1435
1436         if (SEC_CUSTOM == sec)
1437                 return(1);
1438
1439         if (sec == mdoc->lastnamed)
1440                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECREP))
1441                         return(0);
1442
1443         if (sec < mdoc->lastnamed)
1444                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECOOO))
1445                         return(0);
1446
1447         /*
1448          * Check particular section/manual conventions.  LIBRARY can
1449          * only occur in manual section 2, 3, and 9.
1450          */
1451
1452         switch (sec) {
1453         case (SEC_LIBRARY):
1454                 assert(mdoc->meta.msec);
1455                 if (*mdoc->meta.msec == '2')
1456                         break;
1457                 if (*mdoc->meta.msec == '3')
1458                         break;
1459                 if (*mdoc->meta.msec == '9')
1460                         break;
1461                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECMSEC));
1462         default:
1463                 break;
1464         }
1465
1466         return(1);
1467 }