mdoc_validate.c

   1 /*      $Id: mdoc_validate.c,v 1.96 2010/06/12 11:58:22 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009 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 /* TODO: ignoring Pp (it's superfluous in some invocations). */
  36
  37 #define PRE_ARGS  struct mdoc *mdoc, struct mdoc_node *n
  38 #define POST_ARGS struct mdoc *mdoc
  39
  40 typedef int     (*v_pre)(PRE_ARGS);
  41 typedef int     (*v_post)(POST_ARGS);
  42
  43 struct  valids {
  44         v_pre   *pre;
  45         v_post  *post;
  46 };
  47
  48 static  int      check_parent(PRE_ARGS, enum mdoct, enum mdoc_type);
  49 static  int      check_stdarg(PRE_ARGS);
  50 static  int      check_text(struct mdoc *, int, int, char *);
  51 static  int      check_argv(struct mdoc *,
  52                         struct mdoc_node *, struct mdoc_argv *);
  53 static  int      check_args(struct mdoc *, struct mdoc_node *);
  54 static  int      err_child_lt(struct mdoc *, const char *, int);
  55 static  int      warn_child_lt(struct mdoc *, const char *, int);
  56 static  int      err_child_gt(struct mdoc *, const char *, int);
  57 static  int      warn_child_gt(struct mdoc *, const char *, int);
  58 static  int      err_child_eq(struct mdoc *, const char *, int);
  59 static  int      warn_child_eq(struct mdoc *, const char *, int);
  60 static  int      warn_count(struct mdoc *, const char *,
  61                         int, const char *, int);
  62 static  int      err_count(struct mdoc *, const char *,
  63                         int, const char *, int);
  64
  65 static  int      berr_ge1(POST_ARGS);
  66 static  int      bwarn_ge1(POST_ARGS);
  67 static  int      ebool(POST_ARGS);
  68 static  int      eerr_eq0(POST_ARGS);
  69 static  int      eerr_eq1(POST_ARGS);
  70 static  int      eerr_ge1(POST_ARGS);
  71 static  int      eerr_le1(POST_ARGS);
  72 static  int      ewarn_ge1(POST_ARGS);
  73 static  int      herr_eq0(POST_ARGS);
  74 static  int      herr_ge1(POST_ARGS);
  75 static  int      hwarn_eq1(POST_ARGS);
  76 static  int      hwarn_eq0(POST_ARGS);
  77 static  int      hwarn_le1(POST_ARGS);
  78
  79 static  int      post_an(POST_ARGS);
  80 static  int      post_at(POST_ARGS);
  81 static  int      post_bf(POST_ARGS);
  82 static  int      post_bl(POST_ARGS);
  83 static  int      post_bl_head(POST_ARGS);
  84 static  int      post_dt(POST_ARGS);
  85 static  int      post_it(POST_ARGS);
  86 static  int      post_lb(POST_ARGS);
  87 static  int      post_nm(POST_ARGS);
  88 static  int      post_root(POST_ARGS);
  89 static  int      post_rs(POST_ARGS);
  90 static  int      post_sh(POST_ARGS);
  91 static  int      post_sh_body(POST_ARGS);
  92 static  int      post_sh_head(POST_ARGS);
  93 static  int      post_st(POST_ARGS);
  94 static  int      post_eoln(POST_ARGS);
  95 static  int      post_vt(POST_ARGS);
  96 static  int      pre_an(PRE_ARGS);
  97 static  int      pre_bd(PRE_ARGS);
  98 static  int      pre_bl(PRE_ARGS);
  99 static  int      pre_dd(PRE_ARGS);
 100 static  int      pre_display(PRE_ARGS);
 101 static  int      pre_dt(PRE_ARGS);
 102 static  int      pre_it(PRE_ARGS);
 103 static  int      pre_os(PRE_ARGS);
 104 static  int      pre_rv(PRE_ARGS);
 105 static  int      pre_sh(PRE_ARGS);
 106 static  int      pre_ss(PRE_ARGS);
 107
 108 static  v_post   posts_an[] = { post_an, NULL };
 109 static  v_post   posts_at[] = { post_at, NULL };
 110 static  v_post   posts_bd[] = { hwarn_eq0, bwarn_ge1, NULL };
 111 static  v_post   posts_bf[] = { hwarn_le1, post_bf, NULL };
 112 static  v_post   posts_bl[] = { bwarn_ge1, post_bl, NULL };
 113 static  v_post   posts_bool[] = { eerr_eq1, ebool, NULL };
 114 static  v_post   posts_eoln[] = { post_eoln, NULL };
 115 static  v_post   posts_dt[] = { post_dt, NULL };
 116 static  v_post   posts_fo[] = { hwarn_eq1, bwarn_ge1, NULL };
 117 static  v_post   posts_it[] = { post_it, NULL };
 118 static  v_post   posts_lb[] = { eerr_eq1, post_lb, NULL };
 119 static  v_post   posts_nd[] = { berr_ge1, NULL };
 120 static  v_post   posts_nm[] = { post_nm, NULL };
 121 static  v_post   posts_notext[] = { eerr_eq0, NULL };
 122 static  v_post   posts_rs[] = { berr_ge1, herr_eq0, post_rs, NULL };
 123 static  v_post   posts_sh[] = { herr_ge1, bwarn_ge1, post_sh, NULL };
 124 static  v_post   posts_sp[] = { eerr_le1, NULL };
 125 static  v_post   posts_ss[] = { herr_ge1, NULL };
 126 static  v_post   posts_st[] = { eerr_eq1, post_st, NULL };
 127 static  v_post   posts_text[] = { eerr_ge1, NULL };
 128 static  v_post   posts_text1[] = { eerr_eq1, NULL };
 129 static  v_post   posts_vt[] = { post_vt, NULL };
 130 static  v_post   posts_wline[] = { bwarn_ge1, herr_eq0, NULL };
 131 static  v_post   posts_wtext[] = { ewarn_ge1, NULL };
 132 static  v_pre    pres_an[] = { pre_an, NULL };
 133 static  v_pre    pres_bd[] = { pre_display, pre_bd, NULL };
 134 static  v_pre    pres_bl[] = { pre_bl, NULL };
 135 static  v_pre    pres_d1[] = { pre_display, NULL };
 136 static  v_pre    pres_dd[] = { pre_dd, NULL };
 137 static  v_pre    pres_dt[] = { pre_dt, NULL };
 138 static  v_pre    pres_er[] = { NULL, NULL };
 139 static  v_pre    pres_ex[] = { NULL, NULL };
 140 static  v_pre    pres_fd[] = { NULL, NULL };
 141 static  v_pre    pres_it[] = { pre_it, NULL };
 142 static  v_pre    pres_os[] = { pre_os, NULL };
 143 static  v_pre    pres_rv[] = { pre_rv, NULL };
 144 static  v_pre    pres_sh[] = { pre_sh, NULL };
 145 static  v_pre    pres_ss[] = { pre_ss, NULL };
 146
 147 const   struct valids mdoc_valids[MDOC_MAX] = {
 148         { NULL, NULL },                         /* Ap */
 149         { pres_dd, posts_text },                /* Dd */
 150         { pres_dt, posts_dt },                  /* Dt */
 151         { pres_os, NULL },                      /* Os */
 152         { pres_sh, posts_sh },                  /* Sh */
 153         { pres_ss, posts_ss },                  /* Ss */
 154         { NULL, posts_notext },                 /* Pp */
 155         { pres_d1, posts_wline },               /* D1 */
 156         { pres_d1, posts_wline },               /* Dl */
 157         { pres_bd, posts_bd },                  /* Bd */
 158         { NULL, NULL },                         /* Ed */
 159         { pres_bl, posts_bl },                  /* Bl */
 160         { NULL, NULL },                         /* El */
 161         { pres_it, posts_it },                  /* It */
 162         { NULL, posts_text },                   /* Ad */
 163         { pres_an, posts_an },                  /* An */
 164         { NULL, NULL },                         /* Ar */
 165         { NULL, posts_text },                   /* Cd */
 166         { NULL, NULL },                         /* Cm */
 167         { NULL, NULL },                         /* Dv */
 168         { pres_er, posts_text },                /* Er */
 169         { NULL, NULL },                         /* Ev */
 170         { pres_ex, NULL },                      /* Ex */
 171         { NULL, NULL },                         /* Fa */
 172         { pres_fd, posts_wtext },               /* Fd */
 173         { NULL, NULL },                         /* Fl */
 174         { NULL, posts_text },                   /* Fn */
 175         { NULL, posts_wtext },                  /* Ft */
 176         { NULL, posts_text },                   /* Ic */
 177         { NULL, posts_text1 },                  /* In */
 178         { NULL, NULL },                         /* Li */
 179         { NULL, posts_nd },                     /* Nd */
 180         { NULL, posts_nm },                     /* Nm */
 181         { NULL, posts_wline },                  /* Op */
 182         { NULL, NULL },                         /* Ot */
 183         { NULL, NULL },                         /* Pa */
 184         { pres_rv, NULL },                      /* Rv */
 185         { NULL, posts_st },                     /* St */
 186         { NULL, NULL },                         /* Va */
 187         { NULL, posts_vt },                     /* Vt */
 188         { NULL, posts_wtext },                  /* Xr */
 189         { NULL, posts_text },                   /* %A */
 190         { NULL, posts_text },                   /* %B */ /* FIXME: can be used outside Rs/Re. */
 191         { NULL, posts_text },                   /* %D */ /* FIXME: check date with mandoc_a2time(). */
 192         { NULL, posts_text },                   /* %I */
 193         { NULL, posts_text },                   /* %J */
 194         { NULL, posts_text },                   /* %N */
 195         { NULL, posts_text },                   /* %O */
 196         { NULL, posts_text },                   /* %P */
 197         { NULL, posts_text },                   /* %R */
 198         { NULL, posts_text },                   /* %T */ /* FIXME: can be used outside Rs/Re. */
 199         { NULL, posts_text },                   /* %V */
 200         { NULL, NULL },                         /* Ac */
 201         { NULL, NULL },                         /* Ao */
 202         { NULL, posts_wline },                  /* Aq */
 203         { NULL, posts_at },                     /* At */
 204         { NULL, NULL },                         /* Bc */
 205         { NULL, posts_bf },                     /* Bf */
 206         { NULL, NULL },                         /* Bo */
 207         { NULL, posts_wline },                  /* Bq */
 208         { NULL, NULL },                         /* Bsx */
 209         { NULL, NULL },                         /* Bx */
 210         { NULL, posts_bool },                   /* Db */
 211         { NULL, NULL },                         /* Dc */
 212         { NULL, NULL },                         /* Do */
 213         { NULL, posts_wline },                  /* Dq */
 214         { NULL, NULL },                         /* Ec */
 215         { NULL, NULL },                         /* Ef */
 216         { NULL, NULL },                         /* Em */
 217         { NULL, NULL },                         /* Eo */
 218         { NULL, NULL },                         /* Fx */
 219         { NULL, posts_text },                   /* Ms */
 220         { NULL, posts_notext },                 /* No */
 221         { NULL, posts_notext },                 /* Ns */
 222         { NULL, NULL },                         /* Nx */
 223         { NULL, NULL },                         /* Ox */
 224         { NULL, NULL },                         /* Pc */
 225         { NULL, posts_text1 },                  /* Pf */
 226         { NULL, NULL },                         /* Po */
 227         { NULL, posts_wline },                  /* Pq */
 228         { NULL, NULL },                         /* Qc */
 229         { NULL, posts_wline },                  /* Ql */
 230         { NULL, NULL },                         /* Qo */
 231         { NULL, posts_wline },                  /* Qq */
 232         { NULL, NULL },                         /* Re */
 233         { NULL, posts_rs },                     /* Rs */
 234         { NULL, NULL },                         /* Sc */
 235         { NULL, NULL },                         /* So */
 236         { NULL, posts_wline },                  /* Sq */
 237         { NULL, posts_bool },                   /* Sm */
 238         { NULL, posts_text },                   /* Sx */
 239         { NULL, posts_text },                   /* Sy */
 240         { NULL, posts_text },                   /* Tn */
 241         { NULL, NULL },                         /* Ux */
 242         { NULL, NULL },                         /* Xc */
 243         { NULL, NULL },                         /* Xo */
 244         { NULL, posts_fo },                     /* Fo */
 245         { NULL, NULL },                         /* Fc */
 246         { NULL, NULL },                         /* Oo */
 247         { NULL, NULL },                         /* Oc */
 248         { NULL, posts_wline },                  /* Bk */
 249         { NULL, NULL },                         /* Ek */
 250         { NULL, posts_eoln },                   /* Bt */
 251         { NULL, NULL },                         /* Hf */
 252         { NULL, NULL },                         /* Fr */
 253         { NULL, posts_eoln },                   /* Ud */
 254         { NULL, posts_lb },                     /* Lb */
 255         { NULL, posts_notext },                 /* Lp */
 256         { NULL, posts_text },                   /* Lk */
 257         { NULL, posts_text },                   /* Mt */
 258         { NULL, posts_wline },                  /* Brq */
 259         { NULL, NULL },                         /* Bro */
 260         { NULL, NULL },                         /* Brc */
 261         { NULL, posts_text },                   /* %C */
 262         { NULL, NULL },                         /* Es */
 263         { NULL, NULL },                         /* En */
 264         { NULL, NULL },                         /* Dx */
 265         { NULL, posts_text },                   /* %Q */
 266         { NULL, posts_notext },                 /* br */
 267         { NULL, posts_sp },                     /* sp */
 268         { NULL, posts_text1 },                  /* %U */
 269         { NULL, NULL },                         /* Ta */
 270 };
 271
 272
 273 int
 274 mdoc_valid_pre(struct mdoc *mdoc, struct mdoc_node *n)
 275 {
 276         v_pre           *p;
 277         int              line, pos;
 278         char            *tp;
 279
 280         if (MDOC_TEXT == n->type) {
 281                 tp = n->string;
 282                 line = n->line;
 283                 pos = n->pos;
 284                 return(check_text(mdoc, line, pos, tp));
 285         }
 286
 287         if ( ! check_args(mdoc, n))
 288                 return(0);
 289         if (NULL == mdoc_valids[n->tok].pre)
 290                 return(1);
 291         for (p = mdoc_valids[n->tok].pre; *p; p++)
 292                 if ( ! (*p)(mdoc, n))
 293                         return(0);
 294         return(1);
 295 }
 296
 297
 298 int
 299 mdoc_valid_post(struct mdoc *mdoc)
 300 {
 301         v_post          *p;
 302
 303         if (MDOC_VALID & mdoc->last->flags)
 304                 return(1);
 305         mdoc->last->flags |= MDOC_VALID;
 306
 307         if (MDOC_TEXT == mdoc->last->type)
 308                 return(1);
 309         if (MDOC_ROOT == mdoc->last->type)
 310                 return(post_root(mdoc));
 311
 312         if (NULL == mdoc_valids[mdoc->last->tok].post)
 313                 return(1);
 314         for (p = mdoc_valids[mdoc->last->tok].post; *p; p++)
 315                 if ( ! (*p)(mdoc))
 316                         return(0);
 317
 318         return(1);
 319 }
 320
 321
 322 static inline int
 323 warn_count(struct mdoc *m, const char *k,
 324                 int want, const char *v, int has)
 325 {
 326
 327         return(mdoc_vmsg(m, MANDOCERR_ARGCOUNT,
 328                                 m->last->line, m->last->pos,
 329                                 "%s %s %d (have %d)", v, k, want, has));
 330 }
 331
 332
 333 static inline int
 334 err_count(struct mdoc *m, const char *k,
 335                 int want, const char *v, int has)
 336 {
 337
 338         mdoc_vmsg(m, MANDOCERR_SYNTARGCOUNT,
 339                         m->last->line, m->last->pos,
 340                         "%s %s %d (have %d)",
 341                         v, k, want, has);
 342         return(0);
 343 }
 344
 345
 346 /*
 347  * Build these up with macros because they're basically the same check
 348  * for different inequalities.  Yes, this could be done with functions,
 349  * but this is reasonable for now.
 350  */
 351
 352 #define CHECK_CHILD_DEFN(lvl, name, ineq)                       \
 353 static int                                                      \
 354 lvl##_child_##name(struct mdoc *mdoc, const char *p, int sz)    \
 355 {                                                               \
 356         if (mdoc->last->nchild ineq sz)                         \
 357                 return(1);                                      \
 358         return(lvl##_count(mdoc, #ineq, sz, p, mdoc->last->nchild)); \
 359 }
 360
 361 #define CHECK_BODY_DEFN(name, lvl, func, num)                   \
 362 static int                                                      \
 363 b##lvl##_##name(POST_ARGS)                                      \
 364 {                                                               \
 365         if (MDOC_BODY != mdoc->last->type)                      \
 366                 return(1);                                      \
 367         return(func(mdoc, "multi-line arguments", (num)));      \
 368 }
 369
 370 #define CHECK_ELEM_DEFN(name, lvl, func, num)                   \
 371 static int                                                      \
 372 e##lvl##_##name(POST_ARGS)                                      \
 373 {                                                               \
 374         assert(MDOC_ELEM == mdoc->last->type);                  \
 375         return(func(mdoc, "line arguments", (num)));            \
 376 }
 377
 378 #define CHECK_HEAD_DEFN(name, lvl, func, num)                   \
 379 static int                                                      \
 380 h##lvl##_##name(POST_ARGS)                                      \
 381 {                                                               \
 382         if (MDOC_HEAD != mdoc->last->type)                      \
 383                 return(1);                                      \
 384         return(func(mdoc, "line arguments", (num)));            \
 385 }
 386
 387
 388 CHECK_CHILD_DEFN(warn, gt, >)                   /* warn_child_gt() */
 389 CHECK_CHILD_DEFN(err, gt, >)                    /* err_child_gt() */
 390 CHECK_CHILD_DEFN(warn, eq, ==)                  /* warn_child_eq() */
 391 CHECK_CHILD_DEFN(err, eq, ==)                   /* err_child_eq() */
 392 CHECK_CHILD_DEFN(err, lt, <)                    /* err_child_lt() */
 393 CHECK_CHILD_DEFN(warn, lt, <)                   /* warn_child_lt() */
 394 CHECK_BODY_DEFN(ge1, warn, warn_child_gt, 0)    /* bwarn_ge1() */
 395 CHECK_BODY_DEFN(ge1, err, err_child_gt, 0)      /* berr_ge1() */
 396 CHECK_ELEM_DEFN(ge1, warn, warn_child_gt, 0)    /* ewarn_ge1() */
 397 CHECK_ELEM_DEFN(eq1, err, err_child_eq, 1)      /* eerr_eq1() */
 398 CHECK_ELEM_DEFN(le1, err, err_child_lt, 2)      /* eerr_le1() */
 399 CHECK_ELEM_DEFN(eq0, err, err_child_eq, 0)      /* eerr_eq0() */
 400 CHECK_ELEM_DEFN(ge1, err, err_child_gt, 0)      /* eerr_ge1() */
 401 CHECK_HEAD_DEFN(eq0, err, err_child_eq, 0)      /* herr_eq0() */
 402 CHECK_HEAD_DEFN(le1, warn, warn_child_lt, 2)    /* hwarn_le1() */
 403 CHECK_HEAD_DEFN(ge1, err, err_child_gt, 0)      /* herr_ge1() */
 404 CHECK_HEAD_DEFN(eq1, warn, warn_child_eq, 1)    /* hwarn_eq1() */
 405 CHECK_HEAD_DEFN(eq0, warn, warn_child_eq, 0)    /* hwarn_eq0() */
 406
 407
 408 static int
 409 check_stdarg(PRE_ARGS)
 410 {
 411
 412         if (n->args && 1 == n->args->argc)
 413                 if (MDOC_Std == n->args->argv[0].arg)
 414                         return(1);
 415         return(mdoc_nmsg(mdoc, n, MANDOCERR_NOARGV));
 416 }
 417
 418
 419 static int
 420 check_args(struct mdoc *m, struct mdoc_node *n)
 421 {
 422         int              i;
 423
 424         if (NULL == n->args)
 425                 return(1);
 426
 427         assert(n->args->argc);
 428         for (i = 0; i < (int)n->args->argc; i++)
 429                 if ( ! check_argv(m, n, &n->args->argv[i]))
 430                         return(0);
 431
 432         return(1);
 433 }
 434
 435
 436 static int
 437 check_argv(struct mdoc *m, struct mdoc_node *n, struct mdoc_argv *v)
 438 {
 439         int              i;
 440
 441         for (i = 0; i < (int)v->sz; i++)
 442                 if ( ! check_text(m, v->line, v->pos, v->value[i]))
 443                         return(0);
 444
 445         if (MDOC_Std == v->arg) {
 446                 if (v->sz || m->meta.name)
 447                         return(1);
 448                 if ( ! mdoc_nmsg(m, n, MANDOCERR_NONAME))
 449                         return(0);
 450         }
 451
 452         return(1);
 453 }
 454
 455
 456 static int
 457 check_text(struct mdoc *mdoc, int line, int pos, char *p)
 458 {
 459         int              c;
 460
 461         for ( ; *p; p++, pos++) {
 462                 if ('\t' == *p) {
 463                         if ( ! (MDOC_LITERAL & mdoc->flags))
 464                                 if ( ! mdoc_pmsg(mdoc, line, pos, MANDOCERR_BADCHAR))
 465                                         return(0);
 466                 } else if ( ! isprint((u_char)*p) && ASCII_HYPH != *p)
 467                         if ( ! mdoc_pmsg(mdoc, line, pos, MANDOCERR_BADCHAR))
 468                                 return(0);
 469
 470                 if ('\\' != *p)
 471                         continue;
 472
 473                 c = mandoc_special(p);
 474                 if (c) {
 475                         p += c - 1;
 476                         pos += c - 1;
 477                         continue;
 478                 }
 479
 480                 c = mdoc_pmsg(mdoc, line, pos, MANDOCERR_BADESCAPE);
 481                 if ( ! (MDOC_IGN_ESCAPE & mdoc->pflags) && ! c)
 482                         return(c);
 483         }
 484
 485         return(1);
 486 }
 487
 488
 489
 490
 491 static int
 492 check_parent(PRE_ARGS, enum mdoct tok, enum mdoc_type t)
 493 {
 494
 495         assert(n->parent);
 496         if ((MDOC_ROOT == t || tok == n->parent->tok) &&
 497                         (t == n->parent->type))
 498                 return(1);
 499
 500         mdoc_vmsg(mdoc, MANDOCERR_SYNTCHILD,
 501                                 n->line, n->pos, "want parent %s",
 502                                 MDOC_ROOT == t ? "<root>" :
 503                                         mdoc_macronames[tok]);
 504         return(0);
 505 }
 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, width, offs, cmpt, dupl;
 536         enum mdoc_list   lt;
 537
 538         if (MDOC_BLOCK != n->type) {
 539                 assert(n->parent);
 540                 assert(MDOC_BLOCK == n->parent->type);
 541                 assert(MDOC_Bl == n->parent->tok);
 542                 assert(LIST__NONE != n->parent->data.Bl.type);
 543                 memcpy(&n->data.Bl, &n->parent->data.Bl,
 544                                 sizeof(struct mdoc_bl));
 545                 return(1);
 546         }
 547
 548         /*
 549          * First figure out which kind of list to use: bind ourselves to
 550          * the first mentioned list type and warn about any remaining
 551          * ones.  If we find no list type, we default to LIST_item.
 552          */
 553
 554         assert(LIST__NONE == n->data.Bl.type);
 555         offs = width = cmpt = -1;
 556
 557         /* LINTED */
 558         for (i = 0; n->args && i < (int)n->args->argc; i++) {
 559                 lt = LIST__NONE;
 560                 dupl = 0;
 561                 switch (n->args->argv[i].arg) {
 562                 /* Set list types. */
 563                 case (MDOC_Bullet):
 564                         lt = LIST_bullet;
 565                         break;
 566                 case (MDOC_Dash):
 567                         lt = LIST_dash;
 568                         break;
 569                 case (MDOC_Enum):
 570                         lt = LIST_enum;
 571                         break;
 572                 case (MDOC_Hyphen):
 573                         lt = LIST_hyphen;
 574                         break;
 575                 case (MDOC_Item):
 576                         lt = LIST_item;
 577                         break;
 578                 case (MDOC_Tag):
 579                         lt = LIST_tag;
 580                         break;
 581                 case (MDOC_Diag):
 582                         lt = LIST_diag;
 583                         break;
 584                 case (MDOC_Hang):
 585                         lt = LIST_hang;
 586                         break;
 587                 case (MDOC_Ohang):
 588                         lt = LIST_ohang;
 589                         break;
 590                 case (MDOC_Inset):
 591                         lt = LIST_inset;
 592                         break;
 593                 case (MDOC_Column):
 594                         lt = LIST_column;
 595                         break;
 596                 /* Set list arguments. */
 597                 case (MDOC_Compact):
 598                         if (cmpt >= 0)
 599                                 dupl++;
 600                         cmpt = i;
 601                         break;
 602                 case (MDOC_Width):
 603                         if (width >= 0)
 604                                 dupl++;
 605                         width = i;
 606                         break;
 607                 case (MDOC_Offset):
 608                         if (offs >= 0)
 609                                 dupl++;
 610                         offs = i;
 611                         break;
 612                 }
 613
 614                 /* Check: duplicate auxiliary arguments. */
 615
 616                 if (dupl)
 617                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGVREP))
 618                                 return(0);
 619
 620                 /* Check: multiple list types. */
 621
 622                 if (LIST__NONE != lt && n->data.Bl.type != LIST__NONE)
 623                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTREP))
 624                                 return(0);
 625
 626                 /* Assign list type. */
 627
 628                 if (LIST__NONE != lt && n->data.Bl.type == LIST__NONE)
 629                         n->data.Bl.type = lt;
 630
 631                 /* The list type should come first. */
 632
 633                 if (n->data.Bl.type == LIST__NONE)
 634                         if (width >= 0 || offs >= 0 || cmpt >= 0)
 635                                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTFIRST))
 636                                         return(0);
 637
 638                 continue;
 639         }
 640
 641         /* Allow lists to default to LIST_item. */
 642
 643         if (LIST__NONE == n->data.Bl.type) {
 644                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTTYPE))
 645                         return(0);
 646                 n->data.Bl.type = LIST_item;
 647         }
 648
 649         /*
 650          * Validate the width field.  Some list types don't need width
 651          * types and should be warned about them.  Others should have it
 652          * and must also be warned.
 653          */
 654
 655         switch (n->data.Bl.type) {
 656         case (LIST_tag):
 657                 if (width >= 0)
 658                         break;
 659                 if (mdoc_nmsg(mdoc, n, MANDOCERR_NOWIDTHARG))
 660                         break;
 661                 return(0);
 662         case (LIST_column):
 663                 /* FALLTHROUGH */
 664         case (LIST_diag):
 665                 /* FALLTHROUGH */
 666         case (LIST_ohang):
 667                 /* FALLTHROUGH */
 668         case (LIST_inset):
 669                 /* FALLTHROUGH */
 670         case (LIST_item):
 671                 if (width < 0)
 672                         break;
 673                 if (mdoc_nmsg(mdoc, n, MANDOCERR_WIDTHARG))
 674                         break;
 675                 return(0);
 676         default:
 677                 break;
 678         }
 679
 680         return(1);
 681 }
 682
 683
 684 static int
 685 pre_bd(PRE_ARGS)
 686 {
 687         int              i, dup, comp;
 688         enum mdoc_disp   dt;
 689         const char      *offs;
 690
 691         if (MDOC_BLOCK != n->type) {
 692                 assert(n->parent);
 693                 assert(MDOC_BLOCK == n->parent->type);
 694                 assert(MDOC_Bd == n->parent->tok);
 695                 assert(DISP__NONE != n->parent->data.Bd.type);
 696                 memcpy(&n->data.Bd, &n->parent->data.Bd,
 697                                 sizeof(struct mdoc_bd));
 698                 return(1);
 699         }
 700
 701         assert(DISP__NONE == n->data.Bd.type);
 702
 703         /* LINTED */
 704         for (i = 0; n->args && i < (int)n->args->argc; i++) {
 705                 dt = DISP__NONE;
 706                 dup = comp = 0;
 707                 offs = NULL;
 708
 709                 switch (n->args->argv[i].arg) {
 710                 case (MDOC_Centred):
 711                         dt = DISP_centred;
 712                         break;
 713                 case (MDOC_Ragged):
 714                         dt = DISP_ragged;
 715                         break;
 716                 case (MDOC_Unfilled):
 717                         dt = DISP_unfilled;
 718                         break;
 719                 case (MDOC_Filled):
 720                         dt = DISP_filled;
 721                         break;
 722                 case (MDOC_Literal):
 723                         dt = DISP_literal;
 724                         break;
 725                 case (MDOC_File):
 726                         mdoc_nmsg(mdoc, n, MANDOCERR_BADDISP);
 727                         return(0);
 728                 case (MDOC_Offset):
 729                         /* NB: this can be empty! */
 730                         if (n->args->argv[i].sz) {
 731                                 offs = n->args->argv[i].value[0];
 732                                 dup = (NULL != n->data.Bd.offs);
 733                                 break;
 734                         }
 735                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_IGNARGV))
 736                                 return(0);
 737                         break;
 738                 case (MDOC_Compact):
 739                         comp = 1;
 740                         dup = n->data.Bd.comp;
 741                         break;
 742                 default:
 743                         abort();
 744                         /* NOTREACHED */
 745                 }
 746
 747                 /* Check whether we have duplicates. */
 748
 749                 if (dup && ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGVREP))
 750                         return(0);
 751
 752                 /* Make our auxiliary assignments. */
 753
 754                 if (offs && ! dup)
 755                         n->data.Bd.offs = offs;
 756                 if (comp && ! dup)
 757                         n->data.Bd.comp = comp;
 758
 759                 /* Check whether a type has already been assigned. */
 760
 761                 if (DISP__NONE != dt && n->data.Bd.type != DISP__NONE)
 762                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_DISPREP))
 763                                 return(0);
 764
 765                 /* Make our type assignment. */
 766
 767                 if (DISP__NONE != dt && n->data.Bd.type == DISP__NONE)
 768                         n->data.Bd.type = dt;
 769         }
 770
 771         if (DISP__NONE == n->data.Bd.type) {
 772                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_DISPTYPE))
 773                         return(0);
 774                 n->data.Bd.type = DISP_ragged;
 775         }
 776
 777         return(1);
 778 }
 779
 780
 781 static int
 782 pre_ss(PRE_ARGS)
 783 {
 784
 785         if (MDOC_BLOCK != n->type)
 786                 return(1);
 787         return(check_parent(mdoc, n, MDOC_Sh, MDOC_BODY));
 788 }
 789
 790
 791 static int
 792 pre_sh(PRE_ARGS)
 793 {
 794
 795         if (MDOC_BLOCK != n->type)
 796                 return(1);
 797         return(check_parent(mdoc, n, MDOC_MAX, MDOC_ROOT));
 798 }
 799
 800
 801 static int
 802 pre_it(PRE_ARGS)
 803 {
 804
 805         if (MDOC_BLOCK != n->type)
 806                 return(1);
 807         /*
 808          * FIXME: this can probably be lifted if we make the It into
 809          * something else on-the-fly?
 810          */
 811         return(check_parent(mdoc, n, MDOC_Bl, MDOC_BODY));
 812 }
 813
 814
 815 static int
 816 pre_an(PRE_ARGS)
 817 {
 818
 819         if (NULL == n->args || 1 == n->args->argc)
 820                 return(1);
 821         mdoc_vmsg(mdoc, MANDOCERR_SYNTARGCOUNT,
 822                                 n->line, n->pos,
 823                                 "line arguments == 1 (have %d)",
 824                                 n->args->argc);
 825         return(0);
 826 }
 827
 828
 829 static int
 830 pre_rv(PRE_ARGS)
 831 {
 832
 833         return(check_stdarg(mdoc, n));
 834 }
 835
 836
 837 static int
 838 post_dt(POST_ARGS)
 839 {
 840         const struct mdoc_node *nn;
 841         const char      *p;
 842
 843         if (NULL != (nn = mdoc->last->child))
 844                 for (p = nn->string; *p; p++) {
 845                         if (toupper((u_char)*p) == *p)
 846                                 continue;
 847                         if ( ! mdoc_nmsg(mdoc, nn, MANDOCERR_UPPERCASE))
 848                                 return(0);
 849                         break;
 850                 }
 851
 852         return(1);
 853 }
 854
 855
 856 static int
 857 pre_dt(PRE_ARGS)
 858 {
 859
 860         if (0 == mdoc->meta.date || mdoc->meta.os)
 861                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 862                         return(0);
 863         if (mdoc->meta.title)
 864                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 865                         return(0);
 866         return(1);
 867 }
 868
 869
 870 static int
 871 pre_os(PRE_ARGS)
 872 {
 873
 874         if (NULL == mdoc->meta.title || 0 == mdoc->meta.date)
 875                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 876                         return(0);
 877         if (mdoc->meta.os)
 878                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 879                         return(0);
 880         return(1);
 881 }
 882
 883
 884 static int
 885 pre_dd(PRE_ARGS)
 886 {
 887
 888         if (mdoc->meta.title || mdoc->meta.os)
 889                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 890                         return(0);
 891         if (mdoc->meta.date)
 892                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 893                         return(0);
 894         return(1);
 895 }
 896
 897
 898 static int
 899 post_bf(POST_ARGS)
 900 {
 901         char             *p;
 902         struct mdoc_node *head;
 903
 904         if (MDOC_BLOCK != mdoc->last->type)
 905                 return(1);
 906
 907         head = mdoc->last->head;
 908
 909         if (mdoc->last->args && head->child) {
 910                 /* FIXME: this should provide a default. */
 911                 mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SYNTARGVCOUNT);
 912                 return(0);
 913         } else if (mdoc->last->args)
 914                 return(1);
 915
 916         if (NULL == head->child || MDOC_TEXT != head->child->type) {
 917                 /* FIXME: this should provide a default. */
 918                 mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SYNTARGVCOUNT);
 919                 return(0);
 920         }
 921
 922         p = head->child->string;
 923
 924         if (0 == strcmp(p, "Em"))
 925                 return(1);
 926         else if (0 == strcmp(p, "Li"))
 927                 return(1);
 928         else if (0 == strcmp(p, "Sy"))
 929                 return(1);
 930
 931         mdoc_nmsg(mdoc, head, MANDOCERR_FONTTYPE);
 932         return(0);
 933 }
 934
 935
 936 static int
 937 post_lb(POST_ARGS)
 938 {
 939
 940         if (mdoc_a2lib(mdoc->last->child->string))
 941                 return(1);
 942         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADLIB));
 943 }
 944
 945
 946 static int
 947 post_eoln(POST_ARGS)
 948 {
 949
 950         if (NULL == mdoc->last->child)
 951                 return(1);
 952         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGSLOST));
 953 }
 954
 955
 956 static int
 957 post_vt(POST_ARGS)
 958 {
 959         const struct mdoc_node *n;
 960
 961         /*
 962          * The Vt macro comes in both ELEM and BLOCK form, both of which
 963          * have different syntaxes (yet more context-sensitive
 964          * behaviour).  ELEM types must have a child; BLOCK types,
 965          * specifically the BODY, should only have TEXT children.
 966          */
 967
 968         if (MDOC_ELEM == mdoc->last->type)
 969                 return(eerr_ge1(mdoc));
 970         if (MDOC_BODY != mdoc->last->type)
 971                 return(1);
 972
 973         for (n = mdoc->last->child; n; n = n->next)
 974                 if (MDOC_TEXT != n->type)
 975                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_CHILD))
 976                                 return(0);
 977
 978         return(1);
 979 }
 980
 981
 982 static int
 983 post_nm(POST_ARGS)
 984 {
 985
 986         if (mdoc->last->child)
 987                 return(1);
 988         if (mdoc->meta.name)
 989                 return(1);
 990         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NONAME));
 991 }
 992
 993
 994 static int
 995 post_at(POST_ARGS)
 996 {
 997
 998         if (NULL == mdoc->last->child)
 999                 return(1);
1000         assert(MDOC_TEXT == mdoc->last->child->type);
1001         if (mdoc_a2att(mdoc->last->child->string))
1002                 return(1);
1003         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADATT));
1004 }
1005
1006
1007 static int
1008 post_an(POST_ARGS)
1009 {
1010
1011         if (mdoc->last->args) {
1012                 if (NULL == mdoc->last->child)
1013                         return(1);
1014                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGCOUNT));
1015         }
1016
1017         if (mdoc->last->child)
1018                 return(1);
1019         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS));
1020 }
1021
1022
1023 static int
1024 post_it(POST_ARGS)
1025 {
1026         int               i, cols, rc;
1027         enum mdoc_list    lt;
1028         struct mdoc_node *n, *c;
1029         enum mandocerr    er;
1030
1031         if (MDOC_BLOCK != mdoc->last->type)
1032                 return(1);
1033
1034         n = mdoc->last->parent->parent;
1035         lt = n->data.Bl.type;
1036
1037         if (LIST__NONE == lt) {
1038                 mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_LISTTYPE);
1039                 return(0);
1040         }
1041
1042         switch (lt) {
1043         case (LIST_tag):
1044                 if (mdoc->last->head->child)
1045                         break;
1046                 /* FIXME: give this a dummy value. */
1047                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS))
1048                         return(0);
1049                 break;
1050         case (LIST_hang):
1051                 /* FALLTHROUGH */
1052         case (LIST_ohang):
1053                 /* FALLTHROUGH */
1054         case (LIST_inset):
1055                 /* FALLTHROUGH */
1056         case (LIST_diag):
1057                 if (NULL == mdoc->last->head->child)
1058                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS))
1059                                 return(0);
1060                 if (NULL == mdoc->last->body->child)
1061                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1062                                 return(0);
1063                 break;
1064         case (LIST_bullet):
1065                 /* FALLTHROUGH */
1066         case (LIST_dash):
1067                 /* FALLTHROUGH */
1068         case (LIST_enum):
1069                 /* FALLTHROUGH */
1070         case (LIST_hyphen):
1071                 /* FALLTHROUGH */
1072         case (LIST_item):
1073                 if (mdoc->last->head->child)
1074                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGSLOST))
1075                                 return(0);
1076                 if (NULL == mdoc->last->body->child)
1077                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1078                                 return(0);
1079                 break;
1080         case (LIST_column):
1081                 cols = -1;
1082                 for (i = 0; i < (int)n->args->argc; i++)
1083                         if (MDOC_Column == n->args->argv[i].arg) {
1084                                 cols = (int)n->args->argv[i].sz;
1085                                 break;
1086                         }
1087
1088                 assert(-1 != cols);
1089                 assert(NULL == mdoc->last->head->child);
1090
1091                 if (NULL == mdoc->last->body->child)
1092                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1093                                 return(0);
1094
1095                 for (i = 0, c = mdoc->last->child; c; c = c->next)
1096                         if (MDOC_BODY == c->type)
1097                                 i++;
1098
1099                 if (i < cols)
1100                         er = MANDOCERR_ARGCOUNT;
1101                 else if (i == cols || i == cols + 1)
1102                         break;
1103                 else
1104                         er = MANDOCERR_SYNTARGCOUNT;
1105
1106                 rc = mdoc_vmsg(mdoc, er,
1107                                 mdoc->last->line, mdoc->last->pos,
1108                                 "columns == %d (have %d)", cols, i);
1109                 return(rc);
1110         default:
1111                 break;
1112         }
1113
1114         return(1);
1115 }
1116
1117
1118 static int
1119 post_bl_head(POST_ARGS)
1120 {
1121         int               i;
1122         struct mdoc_node *n;
1123
1124         assert(mdoc->last->parent);
1125         n = mdoc->last->parent;
1126
1127         if (LIST_column == n->data.Bl.type) {
1128                 for (i = 0; i < (int)n->args->argc; i++)
1129                         if (MDOC_Column == n->args->argv[i].arg)
1130                                 break;
1131                 assert(i < (int)n->args->argc);
1132
1133                 if (n->args->argv[i].sz && mdoc->last->nchild) {
1134                         mdoc_nmsg(mdoc, n, MANDOCERR_COLUMNS);
1135                         return(0);
1136                 }
1137                 return(1);
1138         }
1139
1140         if (0 == (i = mdoc->last->nchild))
1141                 return(1);
1142         return(warn_count(mdoc, "==", 0, "line arguments", i));
1143 }
1144
1145
1146 static int
1147 post_bl(POST_ARGS)
1148 {
1149         struct mdoc_node        *n;
1150
1151         if (MDOC_HEAD == mdoc->last->type)
1152                 return(post_bl_head(mdoc));
1153         if (MDOC_BODY != mdoc->last->type)
1154                 return(1);
1155         if (NULL == mdoc->last->child)
1156                 return(1);
1157
1158         /*
1159          * We only allow certain children of `Bl'.  This is usually on
1160          * `It', but apparently `Sm' occurs here and there, so we let
1161          * that one through, too.
1162          */
1163
1164         /* LINTED */
1165         for (n = mdoc->last->child; n; n = n->next) {
1166                 if (MDOC_BLOCK == n->type && MDOC_It == n->tok)
1167                         continue;
1168                 if (MDOC_Sm == n->tok)
1169                         continue;
1170                 mdoc_nmsg(mdoc, n, MANDOCERR_SYNTCHILD);
1171                 return(0);
1172         }
1173
1174         return(1);
1175 }
1176
1177
1178 static int
1179 ebool(struct mdoc *mdoc)
1180 {
1181         struct mdoc_node *n;
1182
1183         /* LINTED */
1184         for (n = mdoc->last->child; n; n = n->next) {
1185                 if (MDOC_TEXT != n->type)
1186                         break;
1187                 if (0 == strcmp(n->string, "on"))
1188                         continue;
1189                 if (0 == strcmp(n->string, "off"))
1190                         continue;
1191                 break;
1192         }
1193
1194         if (NULL == n)
1195                 return(1);
1196         return(mdoc_nmsg(mdoc, n, MANDOCERR_BADBOOL));
1197 }
1198
1199
1200 static int
1201 post_root(POST_ARGS)
1202 {
1203
1204         if (NULL == mdoc->first->child)
1205                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1206         else if ( ! (MDOC_PBODY & mdoc->flags))
1207                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCPROLOG);
1208         else if (MDOC_BLOCK != mdoc->first->child->type)
1209                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1210         else if (MDOC_Sh != mdoc->first->child->tok)
1211                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1212         else
1213                 return(1);
1214
1215         return(0);
1216 }
1217
1218
1219 static int
1220 post_st(POST_ARGS)
1221 {
1222
1223         if (mdoc_a2st(mdoc->last->child->string))
1224                 return(1);
1225         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADSTANDARD));
1226 }
1227
1228
1229 static int
1230 post_rs(POST_ARGS)
1231 {
1232         struct mdoc_node        *nn;
1233
1234         if (MDOC_BODY != mdoc->last->type)
1235                 return(1);
1236
1237         for (nn = mdoc->last->child; nn; nn = nn->next)
1238                 switch (nn->tok) {
1239                 case(MDOC__U):
1240                         /* FALLTHROUGH */
1241                 case(MDOC__Q):
1242                         /* FALLTHROUGH */
1243                 case(MDOC__C):
1244                         /* FALLTHROUGH */
1245                 case(MDOC__A):
1246                         /* FALLTHROUGH */
1247                 case(MDOC__B):
1248                         /* FALLTHROUGH */
1249                 case(MDOC__D):
1250                         /* FALLTHROUGH */
1251                 case(MDOC__I):
1252                         /* FALLTHROUGH */
1253                 case(MDOC__J):
1254                         /* FALLTHROUGH */
1255                 case(MDOC__N):
1256                         /* FALLTHROUGH */
1257                 case(MDOC__O):
1258                         /* FALLTHROUGH */
1259                 case(MDOC__P):
1260                         /* FALLTHROUGH */
1261                 case(MDOC__R):
1262                         /* FALLTHROUGH */
1263                 case(MDOC__T):
1264                         /* FALLTHROUGH */
1265                 case(MDOC__V):
1266                         break;
1267                 default:
1268                         mdoc_nmsg(mdoc, nn, MANDOCERR_SYNTCHILD);
1269                         return(0);
1270                 }
1271
1272         return(1);
1273 }
1274
1275
1276 static int
1277 post_sh(POST_ARGS)
1278 {
1279
1280         if (MDOC_HEAD == mdoc->last->type)
1281                 return(post_sh_head(mdoc));
1282         if (MDOC_BODY == mdoc->last->type)
1283                 return(post_sh_body(mdoc));
1284
1285         return(1);
1286 }
1287
1288
1289 static int
1290 post_sh_body(POST_ARGS)
1291 {
1292         struct mdoc_node *n;
1293
1294         if (SEC_NAME != mdoc->lastsec)
1295                 return(1);
1296
1297         /*
1298          * Warn if the NAME section doesn't contain the `Nm' and `Nd'
1299          * macros (can have multiple `Nm' and one `Nd').  Note that the
1300          * children of the BODY declaration can also be "text".
1301          */
1302
1303         if (NULL == (n = mdoc->last->child))
1304                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC));
1305
1306         for ( ; n && n->next; n = n->next) {
1307                 if (MDOC_ELEM == n->type && MDOC_Nm == n->tok)
1308                         continue;
1309                 if (MDOC_TEXT == n->type)
1310                         continue;
1311                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC))
1312                         return(0);
1313         }
1314
1315         assert(n);
1316         if (MDOC_BLOCK == n->type && MDOC_Nd == n->tok)
1317                 return(1);
1318         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC));
1319 }
1320
1321
1322 static int
1323 post_sh_head(POST_ARGS)
1324 {
1325         char                    buf[BUFSIZ];
1326         enum mdoc_sec           sec;
1327         const struct mdoc_node *n;
1328
1329         /*
1330          * Process a new section.  Sections are either "named" or
1331          * "custom"; custom sections are user-defined, while named ones
1332          * usually follow a conventional order and may only appear in
1333          * certain manual sections.
1334          */
1335
1336         buf[0] = '\0';
1337
1338         /*
1339          * FIXME: yes, these can use a dynamic buffer, but I don't do so
1340          * in the interests of simplicity.
1341          */
1342
1343         for (n = mdoc->last->child; n; n = n->next) {
1344                 /* XXX - copied from compact(). */
1345                 assert(MDOC_TEXT == n->type);
1346
1347                 if (strlcat(buf, n->string, BUFSIZ) >= BUFSIZ) {
1348                         mdoc_nmsg(mdoc, n, MANDOCERR_MEM);
1349                         return(0);
1350                 }
1351                 if (NULL == n->next)
1352                         continue;
1353                 if (strlcat(buf, " ", BUFSIZ) >= BUFSIZ) {
1354                         mdoc_nmsg(mdoc, n, MANDOCERR_MEM);
1355                         return(0);
1356                 }
1357         }
1358
1359         sec = mdoc_str2sec(buf);
1360
1361         /*
1362          * Check: NAME should always be first, CUSTOM has no roles,
1363          * non-CUSTOM has a conventional order to be followed.
1364          */
1365
1366         if (SEC_NAME != sec && SEC_NONE == mdoc->lastnamed)
1367                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NAMESECFIRST))
1368                         return(0);
1369
1370         if (SEC_CUSTOM == sec)
1371                 return(1);
1372
1373         if (sec == mdoc->lastnamed)
1374                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECREP))
1375                         return(0);
1376
1377         if (sec < mdoc->lastnamed)
1378                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECOOO))
1379                         return(0);
1380
1381         /*
1382          * Check particular section/manual conventions.  LIBRARY can
1383          * only occur in manual section 2, 3, and 9.
1384          */
1385
1386         switch (sec) {
1387         case (SEC_LIBRARY):
1388                 assert(mdoc->meta.msec);
1389                 if (*mdoc->meta.msec == '2')
1390                         break;
1391                 if (*mdoc->meta.msec == '3')
1392                         break;
1393                 if (*mdoc->meta.msec == '9')
1394                         break;
1395                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECMSEC));
1396         default:
1397                 break;
1398         }
1399
1400         return(1);
1401 }