mdoc_validate.c

   1 /*      $Id: mdoc_validate.c,v 1.91 2010/06/03 13:44:36 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, const char *);
  51 static  int      check_argv(struct mdoc *,
  52                         const struct mdoc_node *,
  53                         const struct mdoc_argv *);
  54 static  int      check_args(struct mdoc *,
  55                         const struct mdoc_node *);
  56 static  int      err_child_lt(struct mdoc *, const char *, int);
  57 static  int      warn_child_lt(struct mdoc *, const char *, int);
  58 static  int      err_child_gt(struct mdoc *, const char *, int);
  59 static  int      warn_child_gt(struct mdoc *, const char *, int);
  60 static  int      err_child_eq(struct mdoc *, const char *, int);
  61 static  int      warn_child_eq(struct mdoc *, const char *, int);
  62 static  int      warn_count(struct mdoc *, const char *,
  63                         int, const char *, int);
  64 static  int      err_count(struct mdoc *, const char *,
  65                         int, const char *, int);
  66
  67 static  int      berr_ge1(POST_ARGS);
  68 static  int      bwarn_ge1(POST_ARGS);
  69 static  int      ebool(POST_ARGS);
  70 static  int      eerr_eq0(POST_ARGS);
  71 static  int      eerr_eq1(POST_ARGS);
  72 static  int      eerr_ge1(POST_ARGS);
  73 static  int      eerr_le1(POST_ARGS);
  74 static  int      ewarn_ge1(POST_ARGS);
  75 static  int      herr_eq0(POST_ARGS);
  76 static  int      herr_ge1(POST_ARGS);
  77 static  int      hwarn_eq1(POST_ARGS);
  78 static  int      hwarn_eq0(POST_ARGS);
  79 static  int      hwarn_le1(POST_ARGS);
  80
  81 static  int      post_an(POST_ARGS);
  82 static  int      post_at(POST_ARGS);
  83 static  int      post_bf(POST_ARGS);
  84 static  int      post_bl(POST_ARGS);
  85 static  int      post_bl_head(POST_ARGS);
  86 static  int      post_dt(POST_ARGS);
  87 static  int      post_it(POST_ARGS);
  88 static  int      post_lb(POST_ARGS);
  89 static  int      post_nm(POST_ARGS);
  90 static  int      post_root(POST_ARGS);
  91 static  int      post_rs(POST_ARGS);
  92 static  int      post_sh(POST_ARGS);
  93 static  int      post_sh_body(POST_ARGS);
  94 static  int      post_sh_head(POST_ARGS);
  95 static  int      post_st(POST_ARGS);
  96 static  int      post_eoln(POST_ARGS);
  97 static  int      post_vt(POST_ARGS);
  98 static  int      pre_an(PRE_ARGS);
  99 static  int      pre_bd(PRE_ARGS);
 100 static  int      pre_bl(PRE_ARGS);
 101 static  int      pre_dd(PRE_ARGS);
 102 static  int      pre_display(PRE_ARGS);
 103 static  int      pre_dt(PRE_ARGS);
 104 static  int      pre_it(PRE_ARGS);
 105 static  int      pre_os(PRE_ARGS);
 106 static  int      pre_rv(PRE_ARGS);
 107 static  int      pre_sh(PRE_ARGS);
 108 static  int      pre_ss(PRE_ARGS);
 109
 110 static  v_post   posts_an[] = { post_an, NULL };
 111 static  v_post   posts_at[] = { post_at, NULL };
 112 static  v_post   posts_bd[] = { hwarn_eq0, bwarn_ge1, NULL };
 113 static  v_post   posts_bf[] = { hwarn_le1, post_bf, NULL };
 114 static  v_post   posts_bl[] = { bwarn_ge1, post_bl, NULL };
 115 static  v_post   posts_bool[] = { eerr_eq1, ebool, NULL };
 116 static  v_post   posts_eoln[] = { post_eoln, NULL };
 117 static  v_post   posts_dt[] = { post_dt, NULL };
 118 static  v_post   posts_fo[] = { hwarn_eq1, bwarn_ge1, NULL };
 119 static  v_post   posts_it[] = { post_it, NULL };
 120 static  v_post   posts_lb[] = { eerr_eq1, post_lb, NULL };
 121 static  v_post   posts_nd[] = { berr_ge1, NULL };
 122 static  v_post   posts_nm[] = { post_nm, NULL };
 123 static  v_post   posts_notext[] = { eerr_eq0, NULL };
 124 static  v_post   posts_rs[] = { berr_ge1, herr_eq0, post_rs, NULL };
 125 static  v_post   posts_sh[] = { herr_ge1, bwarn_ge1, post_sh, NULL };
 126 static  v_post   posts_sp[] = { eerr_le1, NULL };
 127 static  v_post   posts_ss[] = { herr_ge1, NULL };
 128 static  v_post   posts_st[] = { eerr_eq1, post_st, NULL };
 129 static  v_post   posts_text[] = { eerr_ge1, NULL };
 130 static  v_post   posts_text1[] = { eerr_eq1, NULL };
 131 static  v_post   posts_vt[] = { post_vt, NULL };
 132 static  v_post   posts_wline[] = { bwarn_ge1, herr_eq0, NULL };
 133 static  v_post   posts_wtext[] = { ewarn_ge1, NULL };
 134 static  v_pre    pres_an[] = { pre_an, NULL };
 135 static  v_pre    pres_bd[] = { pre_display, pre_bd, NULL };
 136 static  v_pre    pres_bl[] = { pre_bl, NULL };
 137 static  v_pre    pres_d1[] = { pre_display, NULL };
 138 static  v_pre    pres_dd[] = { pre_dd, NULL };
 139 static  v_pre    pres_dt[] = { pre_dt, NULL };
 140 static  v_pre    pres_er[] = { NULL, NULL };
 141 static  v_pre    pres_ex[] = { NULL, NULL };
 142 static  v_pre    pres_fd[] = { NULL, NULL };
 143 static  v_pre    pres_it[] = { pre_it, NULL };
 144 static  v_pre    pres_os[] = { pre_os, NULL };
 145 static  v_pre    pres_rv[] = { pre_rv, NULL };
 146 static  v_pre    pres_sh[] = { pre_sh, NULL };
 147 static  v_pre    pres_ss[] = { pre_ss, NULL };
 148
 149 const   struct valids mdoc_valids[MDOC_MAX] = {
 150         { NULL, NULL },                         /* Ap */
 151         { pres_dd, posts_text },                /* Dd */
 152         { pres_dt, posts_dt },                  /* Dt */
 153         { pres_os, NULL },                      /* Os */
 154         { pres_sh, posts_sh },                  /* Sh */
 155         { pres_ss, posts_ss },                  /* Ss */
 156         { NULL, posts_notext },                 /* Pp */
 157         { pres_d1, posts_wline },               /* D1 */
 158         { pres_d1, posts_wline },               /* Dl */
 159         { pres_bd, posts_bd },                  /* Bd */
 160         { NULL, NULL },                         /* Ed */
 161         { pres_bl, posts_bl },                  /* Bl */
 162         { NULL, NULL },                         /* El */
 163         { pres_it, posts_it },                  /* It */
 164         { NULL, posts_text },                   /* Ad */
 165         { pres_an, posts_an },                  /* An */
 166         { NULL, NULL },                         /* Ar */
 167         { NULL, posts_text },                   /* Cd */
 168         { NULL, NULL },                         /* Cm */
 169         { NULL, NULL },                         /* Dv */
 170         { pres_er, posts_text },                /* Er */
 171         { NULL, NULL },                         /* Ev */
 172         { pres_ex, NULL },                      /* Ex */
 173         { NULL, NULL },                         /* Fa */
 174         { pres_fd, posts_wtext },               /* Fd */
 175         { NULL, NULL },                         /* Fl */
 176         { NULL, posts_text },                   /* Fn */
 177         { NULL, posts_wtext },                  /* Ft */
 178         { NULL, posts_text },                   /* Ic */
 179         { NULL, posts_text1 },                  /* In */
 180         { NULL, NULL },                         /* Li */
 181         { NULL, posts_nd },                     /* Nd */
 182         { NULL, posts_nm },                     /* Nm */
 183         { NULL, posts_wline },                  /* Op */
 184         { NULL, NULL },                         /* Ot */
 185         { NULL, NULL },                         /* Pa */
 186         { pres_rv, NULL },                      /* Rv */
 187         { NULL, posts_st },                     /* St */
 188         { NULL, NULL },                         /* Va */
 189         { NULL, posts_vt },                     /* Vt */
 190         { NULL, posts_wtext },                  /* Xr */
 191         { NULL, posts_text },                   /* %A */
 192         { NULL, posts_text },                   /* %B */ /* FIXME: can be used outside Rs/Re. */
 193         { NULL, posts_text },                   /* %D */ /* FIXME: check date with mandoc_a2time(). */
 194         { NULL, posts_text },                   /* %I */
 195         { NULL, posts_text },                   /* %J */
 196         { NULL, posts_text },                   /* %N */
 197         { NULL, posts_text },                   /* %O */
 198         { NULL, posts_text },                   /* %P */
 199         { NULL, posts_text },                   /* %R */
 200         { NULL, posts_text },                   /* %T */ /* FIXME: can be used outside Rs/Re. */
 201         { NULL, posts_text },                   /* %V */
 202         { NULL, NULL },                         /* Ac */
 203         { NULL, NULL },                         /* Ao */
 204         { NULL, posts_wline },                  /* Aq */
 205         { NULL, posts_at },                     /* At */
 206         { NULL, NULL },                         /* Bc */
 207         { NULL, posts_bf },                     /* Bf */
 208         { NULL, NULL },                         /* Bo */
 209         { NULL, posts_wline },                  /* Bq */
 210         { NULL, NULL },                         /* Bsx */
 211         { NULL, NULL },                         /* Bx */
 212         { NULL, posts_bool },                   /* Db */
 213         { NULL, NULL },                         /* Dc */
 214         { NULL, NULL },                         /* Do */
 215         { NULL, posts_wline },                  /* Dq */
 216         { NULL, NULL },                         /* Ec */
 217         { NULL, NULL },                         /* Ef */
 218         { NULL, NULL },                         /* Em */
 219         { NULL, NULL },                         /* Eo */
 220         { NULL, NULL },                         /* Fx */
 221         { NULL, posts_text },                   /* Ms */
 222         { NULL, posts_notext },                 /* No */
 223         { NULL, posts_notext },                 /* Ns */
 224         { NULL, NULL },                         /* Nx */
 225         { NULL, NULL },                         /* Ox */
 226         { NULL, NULL },                         /* Pc */
 227         { NULL, posts_text1 },                  /* Pf */
 228         { NULL, NULL },                         /* Po */
 229         { NULL, posts_wline },                  /* Pq */
 230         { NULL, NULL },                         /* Qc */
 231         { NULL, posts_wline },                  /* Ql */
 232         { NULL, NULL },                         /* Qo */
 233         { NULL, posts_wline },                  /* Qq */
 234         { NULL, NULL },                         /* Re */
 235         { NULL, posts_rs },                     /* Rs */
 236         { NULL, NULL },                         /* Sc */
 237         { NULL, NULL },                         /* So */
 238         { NULL, posts_wline },                  /* Sq */
 239         { NULL, posts_bool },                   /* Sm */
 240         { NULL, posts_text },                   /* Sx */
 241         { NULL, posts_text },                   /* Sy */
 242         { NULL, posts_text },                   /* Tn */
 243         { NULL, NULL },                         /* Ux */
 244         { NULL, NULL },                         /* Xc */
 245         { NULL, NULL },                         /* Xo */
 246         { NULL, posts_fo },                     /* Fo */
 247         { NULL, NULL },                         /* Fc */
 248         { NULL, NULL },                         /* Oo */
 249         { NULL, NULL },                         /* Oc */
 250         { NULL, posts_wline },                  /* Bk */
 251         { NULL, NULL },                         /* Ek */
 252         { NULL, posts_eoln },                   /* Bt */
 253         { NULL, NULL },                         /* Hf */
 254         { NULL, NULL },                         /* Fr */
 255         { NULL, posts_eoln },                   /* Ud */
 256         { NULL, posts_lb },                     /* Lb */
 257         { NULL, posts_notext },                 /* Lp */
 258         { NULL, posts_text },                   /* Lk */
 259         { NULL, posts_text },                   /* Mt */
 260         { NULL, posts_wline },                  /* Brq */
 261         { NULL, NULL },                         /* Bro */
 262         { NULL, NULL },                         /* Brc */
 263         { NULL, posts_text },                   /* %C */
 264         { NULL, NULL },                         /* Es */
 265         { NULL, NULL },                         /* En */
 266         { NULL, NULL },                         /* Dx */
 267         { NULL, posts_text },                   /* %Q */
 268         { NULL, posts_notext },                 /* br */
 269         { NULL, posts_sp },                     /* sp */
 270         { NULL, posts_text1 },                  /* %U */
 271         { NULL, NULL },                         /* Ta */
 272 };
 273
 274
 275 int
 276 mdoc_valid_pre(struct mdoc *mdoc, struct mdoc_node *n)
 277 {
 278         v_pre           *p;
 279         int              line, pos;
 280         const char      *tp;
 281
 282         if (MDOC_TEXT == n->type) {
 283                 tp = n->string;
 284                 line = n->line;
 285                 pos = n->pos;
 286                 return(check_text(mdoc, line, pos, tp));
 287         }
 288
 289         if ( ! check_args(mdoc, n))
 290                 return(0);
 291         if (NULL == mdoc_valids[n->tok].pre)
 292                 return(1);
 293         for (p = mdoc_valids[n->tok].pre; *p; p++)
 294                 if ( ! (*p)(mdoc, n))
 295                         return(0);
 296         return(1);
 297 }
 298
 299
 300 int
 301 mdoc_valid_post(struct mdoc *mdoc)
 302 {
 303         v_post          *p;
 304
 305         if (MDOC_VALID & mdoc->last->flags)
 306                 return(1);
 307         mdoc->last->flags |= MDOC_VALID;
 308
 309         if (MDOC_TEXT == mdoc->last->type)
 310                 return(1);
 311         if (MDOC_ROOT == mdoc->last->type)
 312                 return(post_root(mdoc));
 313
 314         if (NULL == mdoc_valids[mdoc->last->tok].post)
 315                 return(1);
 316         for (p = mdoc_valids[mdoc->last->tok].post; *p; p++)
 317                 if ( ! (*p)(mdoc))
 318                         return(0);
 319
 320         return(1);
 321 }
 322
 323
 324 static inline int
 325 warn_count(struct mdoc *m, const char *k,
 326                 int want, const char *v, int has)
 327 {
 328
 329         return(mdoc_vmsg(m, MANDOCERR_ARGCOUNT,
 330                                 m->last->line, m->last->pos,
 331                                 "%s %s %d (have %d)", v, k, want, has));
 332 }
 333
 334
 335 static inline int
 336 err_count(struct mdoc *m, const char *k,
 337                 int want, const char *v, int has)
 338 {
 339
 340         mdoc_vmsg(m, MANDOCERR_SYNTARGCOUNT,
 341                         m->last->line, m->last->pos,
 342                         "%s %s %d (have %d)",
 343                         v, k, want, has);
 344         return(0);
 345 }
 346
 347
 348 /*
 349  * Build these up with macros because they're basically the same check
 350  * for different inequalities.  Yes, this could be done with functions,
 351  * but this is reasonable for now.
 352  */
 353
 354 #define CHECK_CHILD_DEFN(lvl, name, ineq)                       \
 355 static int                                                      \
 356 lvl##_child_##name(struct mdoc *mdoc, const char *p, int sz)    \
 357 {                                                               \
 358         if (mdoc->last->nchild ineq sz)                         \
 359                 return(1);                                      \
 360         return(lvl##_count(mdoc, #ineq, sz, p, mdoc->last->nchild)); \
 361 }
 362
 363 #define CHECK_BODY_DEFN(name, lvl, func, num)                   \
 364 static int                                                      \
 365 b##lvl##_##name(POST_ARGS)                                      \
 366 {                                                               \
 367         if (MDOC_BODY != mdoc->last->type)                      \
 368                 return(1);                                      \
 369         return(func(mdoc, "multi-line arguments", (num)));      \
 370 }
 371
 372 #define CHECK_ELEM_DEFN(name, lvl, func, num)                   \
 373 static int                                                      \
 374 e##lvl##_##name(POST_ARGS)                                      \
 375 {                                                               \
 376         assert(MDOC_ELEM == mdoc->last->type);                  \
 377         return(func(mdoc, "line arguments", (num)));            \
 378 }
 379
 380 #define CHECK_HEAD_DEFN(name, lvl, func, num)                   \
 381 static int                                                      \
 382 h##lvl##_##name(POST_ARGS)                                      \
 383 {                                                               \
 384         if (MDOC_HEAD != mdoc->last->type)                      \
 385                 return(1);                                      \
 386         return(func(mdoc, "line arguments", (num)));            \
 387 }
 388
 389
 390 CHECK_CHILD_DEFN(warn, gt, >)                   /* warn_child_gt() */
 391 CHECK_CHILD_DEFN(err, gt, >)                    /* err_child_gt() */
 392 CHECK_CHILD_DEFN(warn, eq, ==)                  /* warn_child_eq() */
 393 CHECK_CHILD_DEFN(err, eq, ==)                   /* err_child_eq() */
 394 CHECK_CHILD_DEFN(err, lt, <)                    /* err_child_lt() */
 395 CHECK_CHILD_DEFN(warn, lt, <)                   /* warn_child_lt() */
 396 CHECK_BODY_DEFN(ge1, warn, warn_child_gt, 0)    /* bwarn_ge1() */
 397 CHECK_BODY_DEFN(ge1, err, err_child_gt, 0)      /* berr_ge1() */
 398 CHECK_ELEM_DEFN(ge1, warn, warn_child_gt, 0)    /* ewarn_ge1() */
 399 CHECK_ELEM_DEFN(eq1, err, err_child_eq, 1)      /* eerr_eq1() */
 400 CHECK_ELEM_DEFN(le1, err, err_child_lt, 2)      /* eerr_le1() */
 401 CHECK_ELEM_DEFN(eq0, err, err_child_eq, 0)      /* eerr_eq0() */
 402 CHECK_ELEM_DEFN(ge1, err, err_child_gt, 0)      /* eerr_ge1() */
 403 CHECK_HEAD_DEFN(eq0, err, err_child_eq, 0)      /* herr_eq0() */
 404 CHECK_HEAD_DEFN(le1, warn, warn_child_lt, 2)    /* hwarn_le1() */
 405 CHECK_HEAD_DEFN(ge1, err, err_child_gt, 0)      /* herr_ge1() */
 406 CHECK_HEAD_DEFN(eq1, warn, warn_child_eq, 1)    /* hwarn_eq1() */
 407 CHECK_HEAD_DEFN(eq0, warn, warn_child_eq, 0)    /* hwarn_eq0() */
 408
 409
 410 static int
 411 check_stdarg(PRE_ARGS)
 412 {
 413
 414         if (n->args && 1 == n->args->argc)
 415                 if (MDOC_Std == n->args->argv[0].arg)
 416                         return(1);
 417         return(mdoc_nmsg(mdoc, n, MANDOCERR_NOARGV));
 418 }
 419
 420
 421 static int
 422 check_args(struct mdoc *m, const struct mdoc_node *n)
 423 {
 424         int              i;
 425
 426         if (NULL == n->args)
 427                 return(1);
 428
 429         assert(n->args->argc);
 430         for (i = 0; i < (int)n->args->argc; i++)
 431                 if ( ! check_argv(m, n, &n->args->argv[i]))
 432                         return(0);
 433
 434         return(1);
 435 }
 436
 437
 438 static int
 439 check_argv(struct mdoc *m, const struct mdoc_node *n,
 440                 const struct mdoc_argv *v)
 441 {
 442         int              i;
 443
 444         for (i = 0; i < (int)v->sz; i++)
 445                 if ( ! check_text(m, v->line, v->pos, v->value[i]))
 446                         return(0);
 447
 448         if (MDOC_Std == v->arg) {
 449                 if (v->sz || m->meta.name)
 450                         return(1);
 451                 if ( ! mdoc_nmsg(m, n, MANDOCERR_NONAME))
 452                         return(0);
 453         }
 454
 455         return(1);
 456 }
 457
 458
 459 static int
 460 check_text(struct mdoc *mdoc, int line, int pos, const char *p)
 461 {
 462         int              c;
 463
 464         for ( ; *p; p++, pos++) {
 465                 if ('\t' == *p) {
 466                         if ( ! (MDOC_LITERAL & mdoc->flags))
 467                                 if ( ! mdoc_pmsg(mdoc, line, pos, MANDOCERR_BADCHAR))
 468                                         return(0);
 469                 } else if ( ! isprint((u_char)*p) && ASCII_HYPH != *p)
 470                         if ( ! mdoc_pmsg(mdoc, line, pos, MANDOCERR_BADCHAR))
 471                                 return(0);
 472
 473                 if ('\\' != *p)
 474                         continue;
 475
 476                 c = mandoc_special(p);
 477                 if (c) {
 478                         p += c - 1;
 479                         pos += c - 1;
 480                         continue;
 481                 }
 482
 483                 c = mdoc_pmsg(mdoc, line, pos, MANDOCERR_BADESCAPE);
 484                 if ( ! (MDOC_IGN_ESCAPE & mdoc->pflags) && ! c)
 485                         return(c);
 486         }
 487
 488         return(1);
 489 }
 490
 491
 492
 493
 494 static int
 495 check_parent(PRE_ARGS, enum mdoct tok, enum mdoc_type t)
 496 {
 497
 498         assert(n->parent);
 499         if ((MDOC_ROOT == t || tok == n->parent->tok) &&
 500                         (t == n->parent->type))
 501                 return(1);
 502
 503         mdoc_vmsg(mdoc, MANDOCERR_SYNTCHILD,
 504                                 n->line, n->pos, "want parent %s",
 505                                 MDOC_ROOT == t ? "<root>" :
 506                                         mdoc_macronames[tok]);
 507         return(0);
 508 }
 509
 510
 511
 512 static int
 513 pre_display(PRE_ARGS)
 514 {
 515         struct mdoc_node *node;
 516
 517         /* Display elements (`Bd', `D1'...) cannot be nested. */
 518
 519         if (MDOC_BLOCK != n->type)
 520                 return(1);
 521
 522         /* LINTED */
 523         for (node = mdoc->last->parent; node; node = node->parent)
 524                 if (MDOC_BLOCK == node->type)
 525                         if (MDOC_Bd == node->tok)
 526                                 break;
 527         if (NULL == node)
 528                 return(1);
 529
 530         mdoc_nmsg(mdoc, n, MANDOCERR_NESTEDDISP);
 531         return(0);
 532 }
 533
 534
 535 static int
 536 pre_bl(PRE_ARGS)
 537 {
 538         int              i, width, offs, cmpt, dupl;
 539         enum mdoc_list   lt;
 540
 541         if (MDOC_BLOCK != n->type) {
 542                 assert(n->parent);
 543                 assert(MDOC_BLOCK == n->parent->type);
 544                 assert(MDOC_Bl == n->parent->tok);
 545                 assert(LIST__NONE != n->parent->data.list);
 546                 n->data.list = n->parent->data.list;
 547                 return(1);
 548         }
 549
 550         /*
 551          * First figure out which kind of list to use: bind ourselves to
 552          * the first mentioned list type and warn about any remaining
 553          * ones.  If we find no list type, we default to LIST_item.
 554          */
 555
 556         assert(LIST__NONE == n->data.list);
 557         offs = width = cmpt = -1;
 558
 559         /* LINTED */
 560         for (i = 0; n->args && i < (int)n->args->argc; i++) {
 561                 lt = LIST__NONE;
 562                 dupl = 0;
 563                 switch (n->args->argv[i].arg) {
 564                 /* Set list types. */
 565                 case (MDOC_Bullet):
 566                         lt = LIST_bullet;
 567                         break;
 568                 case (MDOC_Dash):
 569                         lt = LIST_dash;
 570                         break;
 571                 case (MDOC_Enum):
 572                         lt = LIST_enum;
 573                         break;
 574                 case (MDOC_Hyphen):
 575                         lt = LIST_hyphen;
 576                         break;
 577                 case (MDOC_Item):
 578                         lt = LIST_item;
 579                         break;
 580                 case (MDOC_Tag):
 581                         lt = LIST_tag;
 582                         break;
 583                 case (MDOC_Diag):
 584                         lt = LIST_diag;
 585                         break;
 586                 case (MDOC_Hang):
 587                         lt = LIST_hang;
 588                         break;
 589                 case (MDOC_Ohang):
 590                         lt = LIST_ohang;
 591                         break;
 592                 case (MDOC_Inset):
 593                         lt = LIST_inset;
 594                         break;
 595                 case (MDOC_Column):
 596                         lt = LIST_column;
 597                         break;
 598                 /* Set list arguments. */
 599                 case (MDOC_Compact):
 600                         if (cmpt >= 0)
 601                                 dupl++;
 602                         cmpt = i;
 603                         break;
 604                 case (MDOC_Width):
 605                         if (width >= 0)
 606                                 dupl++;
 607                         width = i;
 608                         break;
 609                 case (MDOC_Offset):
 610                         if (offs >= 0)
 611                                 dupl++;
 612                         offs = i;
 613                         break;
 614                 }
 615
 616                 /* Check: duplicate auxiliary arguments. */
 617
 618                 if (dupl)
 619                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGVREP))
 620                                 return(0);
 621
 622                 /* Check: multiple list types. */
 623
 624                 if (LIST__NONE != lt && n->data.list != LIST__NONE)
 625                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTREP))
 626                                 return(0);
 627
 628                 /* Assign list type. */
 629
 630                 if (LIST__NONE != lt && n->data.list == LIST__NONE)
 631                         n->data.list = lt;
 632
 633                 /* The list type should come first. */
 634
 635                 if (n->data.list == LIST__NONE)
 636                         if (width >= 0 || offs >= 0 || cmpt >= 0)
 637                                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTFIRST))
 638                                         return(0);
 639
 640                 continue;
 641         }
 642
 643         /* Allow lists to default to LIST_item. */
 644
 645         if (LIST__NONE == n->data.list) {
 646                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTTYPE))
 647                         return(0);
 648                 n->data.list = LIST_item;
 649         }
 650
 651         /*
 652          * Validate the width field.  Some list types don't need width
 653          * types and should be warned about them.  Others should have it
 654          * and must also be warned.
 655          */
 656
 657         switch (n->data.list) {
 658         case (LIST_tag):
 659                 if (width >= 0)
 660                         break;
 661                 if (mdoc_nmsg(mdoc, n, MANDOCERR_NOWIDTHARG))
 662                         break;
 663                 return(0);
 664         case (LIST_column):
 665                 /* FALLTHROUGH */
 666         case (LIST_diag):
 667                 /* FALLTHROUGH */
 668         case (LIST_ohang):
 669                 /* FALLTHROUGH */
 670         case (LIST_inset):
 671                 /* FALLTHROUGH */
 672         case (LIST_item):
 673                 if (width < 0)
 674                         break;
 675                 if (mdoc_nmsg(mdoc, n, MANDOCERR_WIDTHARG))
 676                         break;
 677                 return(0);
 678         default:
 679                 break;
 680         }
 681
 682         return(1);
 683 }
 684
 685
 686 static int
 687 pre_bd(PRE_ARGS)
 688 {
 689         int              i, type, err;
 690
 691         if (MDOC_BLOCK != n->type)
 692                 return(1);
 693         if (NULL == n->args) {
 694                 mdoc_nmsg(mdoc, n, MANDOCERR_DISPTYPE);
 695                 return(0);
 696         }
 697
 698         /* Make sure that only one type of display is specified.  */
 699
 700         /* LINTED */
 701         for (i = 0, err = type = 0; ! err &&
 702                         i < (int)n->args->argc; i++)
 703                 switch (n->args->argv[i].arg) {
 704                 case (MDOC_Centred):
 705                         /* FALLTHROUGH */
 706                 case (MDOC_Ragged):
 707                         /* FALLTHROUGH */
 708                 case (MDOC_Unfilled):
 709                         /* FALLTHROUGH */
 710                 case (MDOC_Filled):
 711                         /* FALLTHROUGH */
 712                 case (MDOC_Literal):
 713                         if (0 == type++)
 714                                 break;
 715                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_DISPREP))
 716                                 return(0);
 717                         break;
 718                 default:
 719                         break;
 720                 }
 721
 722         if (type)
 723                 return(1);
 724         mdoc_nmsg(mdoc, n, MANDOCERR_DISPTYPE);
 725         return(0);
 726 }
 727
 728
 729 static int
 730 pre_ss(PRE_ARGS)
 731 {
 732
 733         if (MDOC_BLOCK != n->type)
 734                 return(1);
 735         return(check_parent(mdoc, n, MDOC_Sh, MDOC_BODY));
 736 }
 737
 738
 739 static int
 740 pre_sh(PRE_ARGS)
 741 {
 742
 743         if (MDOC_BLOCK != n->type)
 744                 return(1);
 745         return(check_parent(mdoc, n, MDOC_MAX, MDOC_ROOT));
 746 }
 747
 748
 749 static int
 750 pre_it(PRE_ARGS)
 751 {
 752
 753         if (MDOC_BLOCK != n->type)
 754                 return(1);
 755         /*
 756          * FIXME: this can probably be lifted if we make the It into
 757          * something else on-the-fly?
 758          */
 759         return(check_parent(mdoc, n, MDOC_Bl, MDOC_BODY));
 760 }
 761
 762
 763 static int
 764 pre_an(PRE_ARGS)
 765 {
 766
 767         if (NULL == n->args || 1 == n->args->argc)
 768                 return(1);
 769         mdoc_vmsg(mdoc, MANDOCERR_SYNTARGCOUNT,
 770                                 n->line, n->pos,
 771                                 "line arguments == 1 (have %d)",
 772                                 n->args->argc);
 773         return(0);
 774 }
 775
 776
 777 static int
 778 pre_rv(PRE_ARGS)
 779 {
 780
 781         return(check_stdarg(mdoc, n));
 782 }
 783
 784
 785 static int
 786 post_dt(POST_ARGS)
 787 {
 788         const struct mdoc_node *nn;
 789         const char      *p;
 790
 791         if (NULL != (nn = mdoc->last->child))
 792                 for (p = nn->string; *p; p++) {
 793                         if (toupper((u_char)*p) == *p)
 794                                 continue;
 795                         if ( ! mdoc_nmsg(mdoc, nn, MANDOCERR_UPPERCASE))
 796                                 return(0);
 797                         break;
 798                 }
 799
 800         return(1);
 801 }
 802
 803
 804 static int
 805 pre_dt(PRE_ARGS)
 806 {
 807
 808         if (0 == mdoc->meta.date || mdoc->meta.os)
 809                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 810                         return(0);
 811         if (mdoc->meta.title)
 812                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 813                         return(0);
 814         return(1);
 815 }
 816
 817
 818 static int
 819 pre_os(PRE_ARGS)
 820 {
 821
 822         if (NULL == mdoc->meta.title || 0 == mdoc->meta.date)
 823                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 824                         return(0);
 825         if (mdoc->meta.os)
 826                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 827                         return(0);
 828         return(1);
 829 }
 830
 831
 832 static int
 833 pre_dd(PRE_ARGS)
 834 {
 835
 836         if (mdoc->meta.title || mdoc->meta.os)
 837                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 838                         return(0);
 839         if (mdoc->meta.date)
 840                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 841                         return(0);
 842         return(1);
 843 }
 844
 845
 846 static int
 847 post_bf(POST_ARGS)
 848 {
 849         char             *p;
 850         struct mdoc_node *head;
 851
 852         if (MDOC_BLOCK != mdoc->last->type)
 853                 return(1);
 854
 855         head = mdoc->last->head;
 856
 857         if (mdoc->last->args && head->child) {
 858                 /* FIXME: this should provide a default. */
 859                 mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SYNTARGVCOUNT);
 860                 return(0);
 861         } else if (mdoc->last->args)
 862                 return(1);
 863
 864         if (NULL == head->child || MDOC_TEXT != head->child->type) {
 865                 /* FIXME: this should provide a default. */
 866                 mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SYNTARGVCOUNT);
 867                 return(0);
 868         }
 869
 870         p = head->child->string;
 871
 872         if (0 == strcmp(p, "Em"))
 873                 return(1);
 874         else if (0 == strcmp(p, "Li"))
 875                 return(1);
 876         else if (0 == strcmp(p, "Sy"))
 877                 return(1);
 878
 879         mdoc_nmsg(mdoc, head, MANDOCERR_FONTTYPE);
 880         return(0);
 881 }
 882
 883
 884 static int
 885 post_lb(POST_ARGS)
 886 {
 887
 888         if (mdoc_a2lib(mdoc->last->child->string))
 889                 return(1);
 890         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADLIB));
 891 }
 892
 893
 894 static int
 895 post_eoln(POST_ARGS)
 896 {
 897
 898         if (NULL == mdoc->last->child)
 899                 return(1);
 900         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGSLOST));
 901 }
 902
 903
 904 static int
 905 post_vt(POST_ARGS)
 906 {
 907         const struct mdoc_node *n;
 908
 909         /*
 910          * The Vt macro comes in both ELEM and BLOCK form, both of which
 911          * have different syntaxes (yet more context-sensitive
 912          * behaviour).  ELEM types must have a child; BLOCK types,
 913          * specifically the BODY, should only have TEXT children.
 914          */
 915
 916         if (MDOC_ELEM == mdoc->last->type)
 917                 return(eerr_ge1(mdoc));
 918         if (MDOC_BODY != mdoc->last->type)
 919                 return(1);
 920
 921         for (n = mdoc->last->child; n; n = n->next)
 922                 if (MDOC_TEXT != n->type)
 923                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_CHILD))
 924                                 return(0);
 925
 926         return(1);
 927 }
 928
 929
 930 static int
 931 post_nm(POST_ARGS)
 932 {
 933
 934         if (mdoc->last->child)
 935                 return(1);
 936         if (mdoc->meta.name)
 937                 return(1);
 938         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NONAME));
 939 }
 940
 941
 942 static int
 943 post_at(POST_ARGS)
 944 {
 945
 946         if (NULL == mdoc->last->child)
 947                 return(1);
 948         assert(MDOC_TEXT == mdoc->last->child->type);
 949         if (mdoc_a2att(mdoc->last->child->string))
 950                 return(1);
 951         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADATT));
 952 }
 953
 954
 955 static int
 956 post_an(POST_ARGS)
 957 {
 958
 959         if (mdoc->last->args) {
 960                 if (NULL == mdoc->last->child)
 961                         return(1);
 962                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGCOUNT));
 963         }
 964
 965         if (mdoc->last->child)
 966                 return(1);
 967         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS));
 968 }
 969
 970
 971 static int
 972 post_it(POST_ARGS)
 973 {
 974         int               i, cols, rc;
 975         enum mdoc_list    lt;
 976         struct mdoc_node *n, *c;
 977         enum mandocerr    er;
 978
 979         if (MDOC_BLOCK != mdoc->last->type)
 980                 return(1);
 981
 982         n = mdoc->last->parent->parent;
 983         lt = n->data.list;
 984
 985         if (LIST__NONE == lt) {
 986                 mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_LISTTYPE);
 987                 return(0);
 988         }
 989
 990         switch (lt) {
 991         case (LIST_tag):
 992                 if (mdoc->last->head->child)
 993                         break;
 994                 /* FIXME: give this a dummy value. */
 995                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS))
 996                         return(0);
 997                 break;
 998         case (LIST_hang):
 999                 /* FALLTHROUGH */
1000         case (LIST_ohang):
1001                 /* FALLTHROUGH */
1002         case (LIST_inset):
1003                 /* FALLTHROUGH */
1004         case (LIST_diag):
1005                 if (NULL == mdoc->last->head->child)
1006                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS))
1007                                 return(0);
1008                 if (NULL == mdoc->last->body->child)
1009                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1010                                 return(0);
1011                 break;
1012         case (LIST_bullet):
1013                 /* FALLTHROUGH */
1014         case (LIST_dash):
1015                 /* FALLTHROUGH */
1016         case (LIST_enum):
1017                 /* FALLTHROUGH */
1018         case (LIST_hyphen):
1019                 /* FALLTHROUGH */
1020         case (LIST_item):
1021                 if (mdoc->last->head->child)
1022                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGSLOST))
1023                                 return(0);
1024                 if (NULL == mdoc->last->body->child)
1025                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1026                                 return(0);
1027                 break;
1028         case (LIST_column):
1029                 cols = -1;
1030                 for (i = 0; i < (int)n->args->argc; i++)
1031                         if (MDOC_Column == n->args->argv[i].arg) {
1032                                 cols = (int)n->args->argv[i].sz;
1033                                 break;
1034                         }
1035
1036                 assert(-1 != cols);
1037                 assert(NULL == mdoc->last->head->child);
1038
1039                 if (NULL == mdoc->last->body->child)
1040                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1041                                 return(0);
1042
1043                 for (i = 0, c = mdoc->last->child; c; c = c->next)
1044                         if (MDOC_BODY == c->type)
1045                                 i++;
1046
1047                 if (i < cols)
1048                         er = MANDOCERR_ARGCOUNT;
1049                 else if (i == cols || i == cols + 1)
1050                         break;
1051                 else
1052                         er = MANDOCERR_SYNTARGCOUNT;
1053
1054                 rc = mdoc_vmsg(mdoc, er,
1055                                 mdoc->last->line, mdoc->last->pos,
1056                                 "columns == %d (have %d)", cols, i);
1057                 return(rc);
1058         default:
1059                 break;
1060         }
1061
1062         return(1);
1063 }
1064
1065
1066 static int
1067 post_bl_head(POST_ARGS)
1068 {
1069         int               i;
1070         struct mdoc_node *n;
1071
1072         assert(mdoc->last->parent);
1073         n = mdoc->last->parent;
1074
1075         if (LIST_column == n->data.list) {
1076                 for (i = 0; i < (int)n->args->argc; i++)
1077                         if (MDOC_Column == n->args->argv[i].arg)
1078                                 break;
1079                 assert(i < (int)n->args->argc);
1080
1081                 if (n->args->argv[i].sz && mdoc->last->nchild) {
1082                         mdoc_nmsg(mdoc, n, MANDOCERR_COLUMNS);
1083                         return(0);
1084                 }
1085                 return(1);
1086         }
1087
1088         if (0 == (i = mdoc->last->nchild))
1089                 return(1);
1090         return(warn_count(mdoc, "==", 0, "line arguments", i));
1091 }
1092
1093
1094 static int
1095 post_bl(POST_ARGS)
1096 {
1097         struct mdoc_node        *n;
1098
1099         if (MDOC_HEAD == mdoc->last->type)
1100                 return(post_bl_head(mdoc));
1101         if (MDOC_BODY != mdoc->last->type)
1102                 return(1);
1103         if (NULL == mdoc->last->child)
1104                 return(1);
1105
1106         /*
1107          * We only allow certain children of `Bl'.  This is usually on
1108          * `It', but apparently `Sm' occurs here and there, so we let
1109          * that one through, too.
1110          */
1111
1112         /* LINTED */
1113         for (n = mdoc->last->child; n; n = n->next) {
1114                 if (MDOC_BLOCK == n->type && MDOC_It == n->tok)
1115                         continue;
1116                 if (MDOC_Sm == n->tok)
1117                         continue;
1118                 mdoc_nmsg(mdoc, n, MANDOCERR_SYNTCHILD);
1119                 return(0);
1120         }
1121
1122         return(1);
1123 }
1124
1125
1126 static int
1127 ebool(struct mdoc *mdoc)
1128 {
1129         struct mdoc_node *n;
1130
1131         /* LINTED */
1132         for (n = mdoc->last->child; n; n = n->next) {
1133                 if (MDOC_TEXT != n->type)
1134                         break;
1135                 if (0 == strcmp(n->string, "on"))
1136                         continue;
1137                 if (0 == strcmp(n->string, "off"))
1138                         continue;
1139                 break;
1140         }
1141
1142         if (NULL == n)
1143                 return(1);
1144         return(mdoc_nmsg(mdoc, n, MANDOCERR_BADBOOL));
1145 }
1146
1147
1148 static int
1149 post_root(POST_ARGS)
1150 {
1151
1152         if (NULL == mdoc->first->child)
1153                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1154         else if ( ! (MDOC_PBODY & mdoc->flags))
1155                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCPROLOG);
1156         else if (MDOC_BLOCK != mdoc->first->child->type)
1157                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1158         else if (MDOC_Sh != mdoc->first->child->tok)
1159                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1160         else
1161                 return(1);
1162
1163         return(0);
1164 }
1165
1166
1167 static int
1168 post_st(POST_ARGS)
1169 {
1170
1171         if (mdoc_a2st(mdoc->last->child->string))
1172                 return(1);
1173         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADSTANDARD));
1174 }
1175
1176
1177 static int
1178 post_rs(POST_ARGS)
1179 {
1180         struct mdoc_node        *nn;
1181
1182         if (MDOC_BODY != mdoc->last->type)
1183                 return(1);
1184
1185         for (nn = mdoc->last->child; nn; nn = nn->next)
1186                 switch (nn->tok) {
1187                 case(MDOC__U):
1188                         /* FALLTHROUGH */
1189                 case(MDOC__Q):
1190                         /* FALLTHROUGH */
1191                 case(MDOC__C):
1192                         /* FALLTHROUGH */
1193                 case(MDOC__A):
1194                         /* FALLTHROUGH */
1195                 case(MDOC__B):
1196                         /* FALLTHROUGH */
1197                 case(MDOC__D):
1198                         /* FALLTHROUGH */
1199                 case(MDOC__I):
1200                         /* FALLTHROUGH */
1201                 case(MDOC__J):
1202                         /* FALLTHROUGH */
1203                 case(MDOC__N):
1204                         /* FALLTHROUGH */
1205                 case(MDOC__O):
1206                         /* FALLTHROUGH */
1207                 case(MDOC__P):
1208                         /* FALLTHROUGH */
1209                 case(MDOC__R):
1210                         /* FALLTHROUGH */
1211                 case(MDOC__T):
1212                         /* FALLTHROUGH */
1213                 case(MDOC__V):
1214                         break;
1215                 default:
1216                         mdoc_nmsg(mdoc, nn, MANDOCERR_SYNTCHILD);
1217                         return(0);
1218                 }
1219
1220         return(1);
1221 }
1222
1223
1224 static int
1225 post_sh(POST_ARGS)
1226 {
1227
1228         if (MDOC_HEAD == mdoc->last->type)
1229                 return(post_sh_head(mdoc));
1230         if (MDOC_BODY == mdoc->last->type)
1231                 return(post_sh_body(mdoc));
1232
1233         return(1);
1234 }
1235
1236
1237 static int
1238 post_sh_body(POST_ARGS)
1239 {
1240         struct mdoc_node *n;
1241
1242         if (SEC_NAME != mdoc->lastsec)
1243                 return(1);
1244
1245         /*
1246          * Warn if the NAME section doesn't contain the `Nm' and `Nd'
1247          * macros (can have multiple `Nm' and one `Nd').  Note that the
1248          * children of the BODY declaration can also be "text".
1249          */
1250
1251         if (NULL == (n = mdoc->last->child))
1252                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC));
1253
1254         for ( ; n && n->next; n = n->next) {
1255                 if (MDOC_ELEM == n->type && MDOC_Nm == n->tok)
1256                         continue;
1257                 if (MDOC_TEXT == n->type)
1258                         continue;
1259                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC))
1260                         return(0);
1261         }
1262
1263         assert(n);
1264         if (MDOC_BLOCK == n->type && MDOC_Nd == n->tok)
1265                 return(1);
1266         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC));
1267 }
1268
1269
1270 static int
1271 post_sh_head(POST_ARGS)
1272 {
1273         char                    buf[BUFSIZ];
1274         enum mdoc_sec           sec;
1275         const struct mdoc_node *n;
1276
1277         /*
1278          * Process a new section.  Sections are either "named" or
1279          * "custom"; custom sections are user-defined, while named ones
1280          * usually follow a conventional order and may only appear in
1281          * certain manual sections.
1282          */
1283
1284         buf[0] = '\0';
1285
1286         /*
1287          * FIXME: yes, these can use a dynamic buffer, but I don't do so
1288          * in the interests of simplicity.
1289          */
1290
1291         for (n = mdoc->last->child; n; n = n->next) {
1292                 /* XXX - copied from compact(). */
1293                 assert(MDOC_TEXT == n->type);
1294
1295                 if (strlcat(buf, n->string, BUFSIZ) >= BUFSIZ) {
1296                         mdoc_nmsg(mdoc, n, MANDOCERR_MEM);
1297                         return(0);
1298                 }
1299                 if (NULL == n->next)
1300                         continue;
1301                 if (strlcat(buf, " ", BUFSIZ) >= BUFSIZ) {
1302                         mdoc_nmsg(mdoc, n, MANDOCERR_MEM);
1303                         return(0);
1304                 }
1305         }
1306
1307         sec = mdoc_str2sec(buf);
1308
1309         /*
1310          * Check: NAME should always be first, CUSTOM has no roles,
1311          * non-CUSTOM has a conventional order to be followed.
1312          */
1313
1314         if (SEC_NAME != sec && SEC_NONE == mdoc->lastnamed)
1315                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NAMESECFIRST))
1316                         return(0);
1317
1318         if (SEC_CUSTOM == sec)
1319                 return(1);
1320
1321         if (sec == mdoc->lastnamed)
1322                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECREP))
1323                         return(0);
1324
1325         if (sec < mdoc->lastnamed)
1326                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECOOO))
1327                         return(0);
1328
1329         /*
1330          * Check particular section/manual conventions.  LIBRARY can
1331          * only occur in manual section 2, 3, and 9.
1332          */
1333
1334         switch (sec) {
1335         case (SEC_LIBRARY):
1336                 assert(mdoc->meta.msec);
1337                 if (*mdoc->meta.msec == '2')
1338                         break;
1339                 if (*mdoc->meta.msec == '3')
1340                         break;
1341                 if (*mdoc->meta.msec == '9')
1342                         break;
1343                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECMSEC));
1344         default:
1345                 break;
1346         }
1347
1348         return(1);
1349 }