mdoc_validate.c

   1 /*      $Id: mdoc_validate.c,v 1.119 2010/09/27 23:03:44 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <sys/types.h>
  22
  23 #include <assert.h>
  24 #include <ctype.h>
  25 #include <limits.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "mandoc.h"
  31 #include "libmdoc.h"
  32 #include "libmandoc.h"
  33
  34 /* FIXME: .Bl -diag can't have non-text children in HEAD. */
  35
  36 #define PRE_ARGS  struct mdoc *mdoc, struct mdoc_node *n
  37 #define POST_ARGS struct mdoc *mdoc
  38
  39 typedef int     (*v_pre)(PRE_ARGS);
  40 typedef int     (*v_post)(POST_ARGS);
  41
  42 struct  valids {
  43         v_pre   *pre;
  44         v_post  *post;
  45 };
  46
  47 static  int      check_parent(PRE_ARGS, enum mdoct, enum mdoc_type);
  48 static  int      check_stdarg(PRE_ARGS);
  49 static  int      check_text(struct mdoc *, int, int, char *);
  50 static  int      check_argv(struct mdoc *,
  51                         struct mdoc_node *, struct mdoc_argv *);
  52 static  int      check_args(struct mdoc *, struct mdoc_node *);
  53 static  int      err_child_lt(struct mdoc *, const char *, int);
  54 static  int      warn_child_lt(struct mdoc *, const char *, int);
  55 static  int      err_child_gt(struct mdoc *, const char *, int);
  56 static  int      warn_child_gt(struct mdoc *, const char *, int);
  57 static  int      err_child_eq(struct mdoc *, const char *, int);
  58 static  int      warn_child_eq(struct mdoc *, const char *, int);
  59 static  int      warn_count(struct mdoc *, const char *,
  60                         int, const char *, int);
  61 static  int      err_count(struct mdoc *, const char *,
  62                         int, const char *, int);
  63
  64 static  int      berr_ge1(POST_ARGS);
  65 static  int      bwarn_ge1(POST_ARGS);
  66 static  int      ebool(POST_ARGS);
  67 static  int      eerr_eq1(POST_ARGS);
  68 static  int      eerr_ge1(POST_ARGS);
  69 static  int      eerr_le1(POST_ARGS);
  70 static  int      ewarn_eq0(POST_ARGS);
  71 static  int      ewarn_ge1(POST_ARGS);
  72 static  int      herr_eq0(POST_ARGS);
  73 static  int      herr_ge1(POST_ARGS);
  74 static  int      hwarn_eq1(POST_ARGS);
  75 static  int      hwarn_eq0(POST_ARGS);
  76 static  int      hwarn_le1(POST_ARGS);
  77
  78 static  int      post_an(POST_ARGS);
  79 static  int      post_at(POST_ARGS);
  80 static  int      post_bf(POST_ARGS);
  81 static  int      post_bl(POST_ARGS);
  82 static  int      post_bl_head(POST_ARGS);
  83 static  int      post_dt(POST_ARGS);
  84 static  int      post_it(POST_ARGS);
  85 static  int      post_lb(POST_ARGS);
  86 static  int      post_nm(POST_ARGS);
  87 static  int      post_root(POST_ARGS);
  88 static  int      post_rs(POST_ARGS);
  89 static  int      post_sh(POST_ARGS);
  90 static  int      post_sh_body(POST_ARGS);
  91 static  int      post_sh_head(POST_ARGS);
  92 static  int      post_st(POST_ARGS);
  93 static  int      post_eoln(POST_ARGS);
  94 static  int      post_vt(POST_ARGS);
  95 static  int      pre_an(PRE_ARGS);
  96 static  int      pre_bd(PRE_ARGS);
  97 static  int      pre_bl(PRE_ARGS);
  98 static  int      pre_dd(PRE_ARGS);
  99 static  int      pre_display(PRE_ARGS);
 100 static  int      pre_dt(PRE_ARGS);
 101 static  int      pre_it(PRE_ARGS);
 102 static  int      pre_os(PRE_ARGS);
 103 static  int      pre_pp(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_bk[] = { 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[] = { ewarn_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, pre_pp, NULL };
 134 static  v_pre    pres_bl[] = { pre_bl, pre_pp, 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_pp[] = { pre_pp, NULL };
 144 static  v_pre    pres_rv[] = { pre_rv, NULL };
 145 static  v_pre    pres_sh[] = { pre_sh, NULL };
 146 static  v_pre    pres_ss[] = { pre_ss, NULL };
 147
 148 const   struct valids mdoc_valids[MDOC_MAX] = {
 149         { NULL, NULL },                         /* Ap */
 150         { pres_dd, posts_wtext },               /* Dd */
 151         { pres_dt, posts_dt },                  /* Dt */
 152         { pres_os, NULL },                      /* Os */
 153         { pres_sh, posts_sh },                  /* Sh */
 154         { pres_ss, posts_ss },                  /* Ss */
 155         { pres_pp, posts_notext },              /* Pp */
 156         { pres_d1, posts_wline },               /* D1 */
 157         { pres_d1, posts_wline },               /* Dl */
 158         { pres_bd, posts_bd_bk },               /* Bd */
 159         { NULL, NULL },                         /* Ed */
 160         { pres_bl, posts_bl },                  /* Bl */
 161         { NULL, NULL },                         /* El */
 162         { pres_it, posts_it },                  /* It */
 163         { NULL, posts_text },                   /* Ad */
 164         { pres_an, posts_an },                  /* An */
 165         { NULL, NULL },                         /* Ar */
 166         { NULL, posts_text },                   /* Cd */
 167         { NULL, NULL },                         /* Cm */
 168         { NULL, NULL },                         /* Dv */
 169         { pres_er, posts_text },                /* Er */
 170         { NULL, NULL },                         /* Ev */
 171         { pres_ex, NULL },                      /* Ex */
 172         { NULL, NULL },                         /* Fa */
 173         { pres_fd, posts_wtext },               /* Fd */
 174         { NULL, NULL },                         /* Fl */
 175         { NULL, posts_text },                   /* Fn */
 176         { NULL, posts_wtext },                  /* Ft */
 177         { NULL, posts_text },                   /* Ic */
 178         { NULL, posts_text1 },                  /* In */
 179         { NULL, NULL },                         /* Li */
 180         { NULL, posts_nd },                     /* Nd */
 181         { NULL, posts_nm },                     /* Nm */
 182         { NULL, posts_wline },                  /* Op */
 183         { NULL, NULL },                         /* Ot */
 184         { NULL, NULL },                         /* Pa */
 185         { pres_rv, NULL },                      /* Rv */
 186         { NULL, posts_st },                     /* St */
 187         { NULL, NULL },                         /* Va */
 188         { NULL, posts_vt },                     /* Vt */
 189         { NULL, posts_wtext },                  /* Xr */
 190         { NULL, posts_text },                   /* %A */
 191         { NULL, posts_text },                   /* %B */ /* FIXME: can be used outside Rs/Re. */
 192         { NULL, posts_text },                   /* %D */ /* FIXME: check date with mandoc_a2time(). */
 193         { NULL, posts_text },                   /* %I */
 194         { NULL, posts_text },                   /* %J */
 195         { NULL, posts_text },                   /* %N */
 196         { NULL, posts_text },                   /* %O */
 197         { NULL, posts_text },                   /* %P */
 198         { NULL, posts_text },                   /* %R */
 199         { NULL, posts_text },                   /* %T */ /* FIXME: can be used outside Rs/Re. */
 200         { NULL, posts_text },                   /* %V */
 201         { NULL, NULL },                         /* Ac */
 202         { NULL, NULL },                         /* Ao */
 203         { NULL, posts_wline },                  /* Aq */
 204         { NULL, posts_at },                     /* At */
 205         { NULL, NULL },                         /* Bc */
 206         { NULL, posts_bf },                     /* Bf */
 207         { NULL, NULL },                         /* Bo */
 208         { NULL, posts_wline },                  /* Bq */
 209         { NULL, NULL },                         /* Bsx */
 210         { NULL, NULL },                         /* Bx */
 211         { NULL, posts_bool },                   /* Db */
 212         { NULL, NULL },                         /* Dc */
 213         { NULL, NULL },                         /* Do */
 214         { NULL, posts_wline },                  /* Dq */
 215         { NULL, NULL },                         /* Ec */
 216         { NULL, NULL },                         /* Ef */
 217         { NULL, NULL },                         /* Em */
 218         { NULL, NULL },                         /* Eo */
 219         { NULL, NULL },                         /* Fx */
 220         { NULL, posts_text },                   /* Ms */
 221         { NULL, posts_notext },                 /* No */
 222         { NULL, posts_notext },                 /* Ns */
 223         { NULL, NULL },                         /* Nx */
 224         { NULL, NULL },                         /* Ox */
 225         { NULL, NULL },                         /* Pc */
 226         { NULL, posts_text1 },                  /* Pf */
 227         { NULL, NULL },                         /* Po */
 228         { NULL, posts_wline },                  /* Pq */
 229         { NULL, NULL },                         /* Qc */
 230         { NULL, posts_wline },                  /* Ql */
 231         { NULL, NULL },                         /* Qo */
 232         { NULL, posts_wline },                  /* Qq */
 233         { NULL, NULL },                         /* Re */
 234         { NULL, posts_rs },                     /* Rs */
 235         { NULL, NULL },                         /* Sc */
 236         { NULL, NULL },                         /* So */
 237         { NULL, posts_wline },                  /* Sq */
 238         { NULL, posts_bool },                   /* Sm */
 239         { NULL, posts_text },                   /* Sx */
 240         { NULL, posts_text },                   /* Sy */
 241         { NULL, posts_text },                   /* Tn */
 242         { NULL, NULL },                         /* Ux */
 243         { NULL, NULL },                         /* Xc */
 244         { NULL, NULL },                         /* Xo */
 245         { NULL, posts_fo },                     /* Fo */
 246         { NULL, NULL },                         /* Fc */
 247         { NULL, NULL },                         /* Oo */
 248         { NULL, NULL },                         /* Oc */
 249         { NULL, posts_bd_bk },                  /* Bk */
 250         { NULL, NULL },                         /* Ek */
 251         { NULL, posts_eoln },                   /* Bt */
 252         { NULL, NULL },                         /* Hf */
 253         { NULL, NULL },                         /* Fr */
 254         { NULL, posts_eoln },                   /* Ud */
 255         { NULL, posts_lb },                     /* Lb */
 256         { NULL, posts_notext },                 /* Lp */
 257         { NULL, posts_text },                   /* Lk */
 258         { NULL, posts_text },                   /* Mt */
 259         { NULL, posts_wline },                  /* Brq */
 260         { NULL, NULL },                         /* Bro */
 261         { NULL, NULL },                         /* Brc */
 262         { NULL, posts_text },                   /* %C */
 263         { NULL, NULL },                         /* Es */
 264         { NULL, NULL },                         /* En */
 265         { NULL, NULL },                         /* Dx */
 266         { NULL, posts_text },                   /* %Q */
 267         { NULL, posts_notext },                 /* br */
 268         { pres_pp, posts_sp },                  /* sp */
 269         { NULL, posts_text1 },                  /* %U */
 270         { NULL, NULL },                         /* Ta */
 271 };
 272
 273
 274 int
 275 mdoc_valid_pre(struct mdoc *mdoc, struct mdoc_node *n)
 276 {
 277         v_pre           *p;
 278         int              line, pos;
 279         char            *tp;
 280
 281         if (MDOC_TEXT == n->type) {
 282                 tp = n->string;
 283                 line = n->line;
 284                 pos = n->pos;
 285                 return(check_text(mdoc, line, pos, tp));
 286         }
 287
 288         if ( ! check_args(mdoc, n))
 289                 return(0);
 290         if (NULL == mdoc_valids[n->tok].pre)
 291                 return(1);
 292         for (p = mdoc_valids[n->tok].pre; *p; p++)
 293                 if ( ! (*p)(mdoc, n))
 294                         return(0);
 295         return(1);
 296 }
 297
 298
 299 int
 300 mdoc_valid_post(struct mdoc *mdoc)
 301 {
 302         v_post          *p;
 303
 304         if (MDOC_VALID & mdoc->last->flags)
 305                 return(1);
 306         mdoc->last->flags |= MDOC_VALID;
 307
 308         if (MDOC_TEXT == mdoc->last->type)
 309                 return(1);
 310         if (MDOC_ROOT == mdoc->last->type)
 311                 return(post_root(mdoc));
 312
 313         if (NULL == mdoc_valids[mdoc->last->tok].post)
 314                 return(1);
 315         for (p = mdoc_valids[mdoc->last->tok].post; *p; p++)
 316                 if ( ! (*p)(mdoc))
 317                         return(0);
 318
 319         return(1);
 320 }
 321
 322
 323 static inline int
 324 warn_count(struct mdoc *m, const char *k,
 325                 int want, const char *v, int has)
 326 {
 327
 328         return(mdoc_vmsg(m, MANDOCERR_ARGCOUNT,
 329                                 m->last->line, m->last->pos,
 330                                 "%s %s %d (have %d)", v, k, want, has));
 331 }
 332
 333
 334 static inline int
 335 err_count(struct mdoc *m, const char *k,
 336                 int want, const char *v, int has)
 337 {
 338
 339         mdoc_vmsg(m, MANDOCERR_SYNTARGCOUNT,
 340                         m->last->line, m->last->pos,
 341                         "%s %s %d (have %d)",
 342                         v, k, want, has);
 343         return(0);
 344 }
 345
 346
 347 /*
 348  * Build these up with macros because they're basically the same check
 349  * for different inequalities.  Yes, this could be done with functions,
 350  * but this is reasonable for now.
 351  */
 352
 353 #define CHECK_CHILD_DEFN(lvl, name, ineq)                       \
 354 static int                                                      \
 355 lvl##_child_##name(struct mdoc *mdoc, const char *p, int sz)    \
 356 {                                                               \
 357         if (mdoc->last->nchild ineq sz)                         \
 358                 return(1);                                      \
 359         return(lvl##_count(mdoc, #ineq, sz, p, mdoc->last->nchild)); \
 360 }
 361
 362 #define CHECK_BODY_DEFN(name, lvl, func, num)                   \
 363 static int                                                      \
 364 b##lvl##_##name(POST_ARGS)                                      \
 365 {                                                               \
 366         if (MDOC_BODY != mdoc->last->type)                      \
 367                 return(1);                                      \
 368         return(func(mdoc, "multi-line arguments", (num)));      \
 369 }
 370
 371 #define CHECK_ELEM_DEFN(name, lvl, func, num)                   \
 372 static int                                                      \
 373 e##lvl##_##name(POST_ARGS)                                      \
 374 {                                                               \
 375         assert(MDOC_ELEM == mdoc->last->type);                  \
 376         return(func(mdoc, "line arguments", (num)));            \
 377 }
 378
 379 #define CHECK_HEAD_DEFN(name, lvl, func, num)                   \
 380 static int                                                      \
 381 h##lvl##_##name(POST_ARGS)                                      \
 382 {                                                               \
 383         if (MDOC_HEAD != mdoc->last->type)                      \
 384                 return(1);                                      \
 385         return(func(mdoc, "line arguments", (num)));            \
 386 }
 387
 388
 389 CHECK_CHILD_DEFN(warn, gt, >)                   /* warn_child_gt() */
 390 CHECK_CHILD_DEFN(err, gt, >)                    /* err_child_gt() */
 391 CHECK_CHILD_DEFN(warn, eq, ==)                  /* warn_child_eq() */
 392 CHECK_CHILD_DEFN(err, eq, ==)                   /* err_child_eq() */
 393 CHECK_CHILD_DEFN(err, lt, <)                    /* err_child_lt() */
 394 CHECK_CHILD_DEFN(warn, lt, <)                   /* warn_child_lt() */
 395 CHECK_BODY_DEFN(ge1, warn, warn_child_gt, 0)    /* bwarn_ge1() */
 396 CHECK_BODY_DEFN(ge1, err, err_child_gt, 0)      /* berr_ge1() */
 397 CHECK_ELEM_DEFN(eq0, warn, warn_child_eq, 0)    /* ewarn_eq0() */
 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(ge1, err, err_child_gt, 0)      /* eerr_ge1() */
 402 CHECK_HEAD_DEFN(eq0, err, err_child_eq, 0)      /* herr_eq0() */
 403 CHECK_HEAD_DEFN(le1, warn, warn_child_lt, 2)    /* hwarn_le1() */
 404 CHECK_HEAD_DEFN(ge1, err, err_child_gt, 0)      /* herr_ge1() */
 405 CHECK_HEAD_DEFN(eq1, warn, warn_child_eq, 1)    /* hwarn_eq1() */
 406 CHECK_HEAD_DEFN(eq0, warn, warn_child_eq, 0)    /* hwarn_eq0() */
 407
 408
 409 static int
 410 check_stdarg(PRE_ARGS)
 411 {
 412
 413         if (n->args && 1 == n->args->argc)
 414                 if (MDOC_Std == n->args->argv[0].arg)
 415                         return(1);
 416         return(mdoc_nmsg(mdoc, n, MANDOCERR_NOARGV));
 417 }
 418
 419
 420 static int
 421 check_args(struct mdoc *m, struct mdoc_node *n)
 422 {
 423         int              i;
 424
 425         if (NULL == n->args)
 426                 return(1);
 427
 428         assert(n->args->argc);
 429         for (i = 0; i < (int)n->args->argc; i++)
 430                 if ( ! check_argv(m, n, &n->args->argv[i]))
 431                         return(0);
 432
 433         return(1);
 434 }
 435
 436
 437 static int
 438 check_argv(struct mdoc *m, struct mdoc_node *n, struct mdoc_argv *v)
 439 {
 440         int              i;
 441
 442         for (i = 0; i < (int)v->sz; i++)
 443                 if ( ! check_text(m, v->line, v->pos, v->value[i]))
 444                         return(0);
 445
 446         if (MDOC_Std == v->arg) {
 447                 if (v->sz || m->meta.name)
 448                         return(1);
 449                 if ( ! mdoc_nmsg(m, n, MANDOCERR_NONAME))
 450                         return(0);
 451         }
 452
 453         return(1);
 454 }
 455
 456
 457 static int
 458 check_text(struct mdoc *m, int ln, int pos, char *p)
 459 {
 460         int              c;
 461         size_t           sz;
 462
 463         for ( ; *p; p++, pos++) {
 464                 sz = strcspn(p, "\t\\");
 465                 p += (int)sz;
 466
 467                 if ('\0' == *p)
 468                         break;
 469
 470                 pos += (int)sz;
 471
 472                 if ('\t' == *p) {
 473                         if (MDOC_LITERAL & m->flags)
 474                                 continue;
 475                         if (mdoc_pmsg(m, ln, pos, MANDOCERR_BADTAB))
 476                                 continue;
 477                         return(0);
 478                 }
 479
 480                 /* Check the special character. */
 481
 482                 c = mandoc_special(p);
 483                 if (c) {
 484                         p += c - 1;
 485                         pos += c - 1;
 486                 } else
 487                         mdoc_pmsg(m, ln, pos, MANDOCERR_BADESCAPE);
 488         }
 489
 490         return(1);
 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 static int
 512 pre_display(PRE_ARGS)
 513 {
 514         struct mdoc_node *node;
 515
 516         /* Display elements (`Bd', `D1'...) cannot be nested. */
 517
 518         if (MDOC_BLOCK != n->type)
 519                 return(1);
 520
 521         /* LINTED */
 522         for (node = mdoc->last->parent; node; node = node->parent)
 523                 if (MDOC_BLOCK == node->type)
 524                         if (MDOC_Bd == node->tok)
 525                                 break;
 526         if (NULL == node)
 527                 return(1);
 528
 529         mdoc_nmsg(mdoc, n, MANDOCERR_NESTEDDISP);
 530         return(0);
 531 }
 532
 533
 534 static int
 535 pre_bl(PRE_ARGS)
 536 {
 537         int               i, comp, dup;
 538         const char       *offs, *width;
 539         enum mdoc_list    lt;
 540         struct mdoc_node *np;
 541
 542         if (MDOC_BLOCK != n->type) {
 543                 if (ENDBODY_NOT != n->end) {
 544                         assert(n->pending);
 545                         np = n->pending->parent;
 546                 } else
 547                         np = n->parent;
 548
 549                 assert(np);
 550                 assert(MDOC_BLOCK == np->type);
 551                 assert(MDOC_Bl == np->tok);
 552                 assert(np->data.Bl);
 553                 n->data.Bl = np->data.Bl;
 554                 return(1);
 555         }
 556
 557         /*
 558          * First figure out which kind of list to use: bind ourselves to
 559          * the first mentioned list type and warn about any remaining
 560          * ones.  If we find no list type, we default to LIST_item.
 561          */
 562
 563         assert(NULL == n->data.Bl);
 564         n->data.Bl = mandoc_calloc(1, sizeof(struct mdoc_bl));
 565
 566         /* LINTED */
 567         for (i = 0; n->args && i < (int)n->args->argc; i++) {
 568                 lt = LIST__NONE;
 569                 dup = comp = 0;
 570                 width = offs = NULL;
 571                 switch (n->args->argv[i].arg) {
 572                 /* Set list types. */
 573                 case (MDOC_Bullet):
 574                         lt = LIST_bullet;
 575                         break;
 576                 case (MDOC_Dash):
 577                         lt = LIST_dash;
 578                         break;
 579                 case (MDOC_Enum):
 580                         lt = LIST_enum;
 581                         break;
 582                 case (MDOC_Hyphen):
 583                         lt = LIST_hyphen;
 584                         break;
 585                 case (MDOC_Item):
 586                         lt = LIST_item;
 587                         break;
 588                 case (MDOC_Tag):
 589                         lt = LIST_tag;
 590                         break;
 591                 case (MDOC_Diag):
 592                         lt = LIST_diag;
 593                         break;
 594                 case (MDOC_Hang):
 595                         lt = LIST_hang;
 596                         break;
 597                 case (MDOC_Ohang):
 598                         lt = LIST_ohang;
 599                         break;
 600                 case (MDOC_Inset):
 601                         lt = LIST_inset;
 602                         break;
 603                 case (MDOC_Column):
 604                         lt = LIST_column;
 605                         break;
 606                 /* Set list arguments. */
 607                 case (MDOC_Compact):
 608                         dup = n->data.Bl->comp;
 609                         comp = 1;
 610                         break;
 611                 case (MDOC_Width):
 612                         dup = (NULL != n->data.Bl->width);
 613                         width = n->args->argv[i].value[0];
 614                         break;
 615                 case (MDOC_Offset):
 616                         /* NB: this can be empty! */
 617                         if (n->args->argv[i].sz) {
 618                                 offs = n->args->argv[i].value[0];
 619                                 dup = (NULL != n->data.Bl->offs);
 620                                 break;
 621                         }
 622                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_IGNARGV))
 623                                 return(0);
 624                         break;
 625                 default:
 626                         continue;
 627                 }
 628
 629                 /* Check: duplicate auxiliary arguments. */
 630
 631                 if (dup && ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGVREP))
 632                         return(0);
 633
 634                 if (comp && ! dup)
 635                         n->data.Bl->comp = comp;
 636                 if (offs && ! dup)
 637                         n->data.Bl->offs = offs;
 638                 if (width && ! dup)
 639                         n->data.Bl->width = width;
 640
 641                 /* Check: multiple list types. */
 642
 643                 if (LIST__NONE != lt && n->data.Bl->type != LIST__NONE)
 644                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTREP))
 645                                 return(0);
 646
 647                 /* Assign list type. */
 648
 649                 if (LIST__NONE != lt && n->data.Bl->type == LIST__NONE) {
 650                         n->data.Bl->type = lt;
 651                         /* Set column information, too. */
 652                         if (LIST_column == lt) {
 653                                 n->data.Bl->ncols =
 654                                         n->args->argv[i].sz;
 655                                 n->data.Bl->cols = (const char **)
 656                                         n->args->argv[i].value;
 657                         }
 658                 }
 659
 660                 /* The list type should come first. */
 661
 662                 if (n->data.Bl->type == LIST__NONE)
 663                         if (n->data.Bl->width ||
 664                                         n->data.Bl->offs ||
 665                                         n->data.Bl->comp)
 666                                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTFIRST))
 667                                         return(0);
 668
 669                 continue;
 670         }
 671
 672         /* Allow lists to default to LIST_item. */
 673
 674         if (LIST__NONE == n->data.Bl->type) {
 675                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_LISTTYPE))
 676                         return(0);
 677                 n->data.Bl->type = LIST_item;
 678         }
 679
 680         /*
 681          * Validate the width field.  Some list types don't need width
 682          * types and should be warned about them.  Others should have it
 683          * and must also be warned.
 684          */
 685
 686         switch (n->data.Bl->type) {
 687         case (LIST_tag):
 688                 if (n->data.Bl->width)
 689                         break;
 690                 if (mdoc_nmsg(mdoc, n, MANDOCERR_NOWIDTHARG))
 691                         break;
 692                 return(0);
 693         case (LIST_column):
 694                 /* FALLTHROUGH */
 695         case (LIST_diag):
 696                 /* FALLTHROUGH */
 697         case (LIST_ohang):
 698                 /* FALLTHROUGH */
 699         case (LIST_inset):
 700                 /* FALLTHROUGH */
 701         case (LIST_item):
 702                 if (NULL == n->data.Bl->width)
 703                         break;
 704                 if (mdoc_nmsg(mdoc, n, MANDOCERR_WIDTHARG))
 705                         break;
 706                 return(0);
 707         default:
 708                 break;
 709         }
 710
 711         return(1);
 712 }
 713
 714
 715 static int
 716 pre_bd(PRE_ARGS)
 717 {
 718         int               i, dup, comp;
 719         enum mdoc_disp    dt;
 720         const char       *offs;
 721         struct mdoc_node *np;
 722
 723         if (MDOC_BLOCK != n->type) {
 724                 if (ENDBODY_NOT != n->end) {
 725                         assert(n->pending);
 726                         np = n->pending->parent;
 727                 } else
 728                         np = n->parent;
 729
 730                 assert(np);
 731                 assert(MDOC_BLOCK == np->type);
 732                 assert(MDOC_Bd == np->tok);
 733                 assert(np->data.Bd);
 734                 n->data.Bd = np->data.Bd;
 735                 return(1);
 736         }
 737
 738         assert(NULL == n->data.Bd);
 739         n->data.Bd = mandoc_calloc(1, sizeof(struct mdoc_bd));
 740
 741         /* LINTED */
 742         for (i = 0; n->args && i < (int)n->args->argc; i++) {
 743                 dt = DISP__NONE;
 744                 dup = comp = 0;
 745                 offs = NULL;
 746
 747                 switch (n->args->argv[i].arg) {
 748                 case (MDOC_Centred):
 749                         dt = DISP_centred;
 750                         break;
 751                 case (MDOC_Ragged):
 752                         dt = DISP_ragged;
 753                         break;
 754                 case (MDOC_Unfilled):
 755                         dt = DISP_unfilled;
 756                         break;
 757                 case (MDOC_Filled):
 758                         dt = DISP_filled;
 759                         break;
 760                 case (MDOC_Literal):
 761                         dt = DISP_literal;
 762                         break;
 763                 case (MDOC_File):
 764                         mdoc_nmsg(mdoc, n, MANDOCERR_BADDISP);
 765                         return(0);
 766                 case (MDOC_Offset):
 767                         /* NB: this can be empty! */
 768                         if (n->args->argv[i].sz) {
 769                                 offs = n->args->argv[i].value[0];
 770                                 dup = (NULL != n->data.Bd->offs);
 771                                 break;
 772                         }
 773                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_IGNARGV))
 774                                 return(0);
 775                         break;
 776                 case (MDOC_Compact):
 777                         comp = 1;
 778                         dup = n->data.Bd->comp;
 779                         break;
 780                 default:
 781                         abort();
 782                         /* NOTREACHED */
 783                 }
 784
 785                 /* Check whether we have duplicates. */
 786
 787                 if (dup && ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGVREP))
 788                         return(0);
 789
 790                 /* Make our auxiliary assignments. */
 791
 792                 if (offs && ! dup)
 793                         n->data.Bd->offs = offs;
 794                 if (comp && ! dup)
 795                         n->data.Bd->comp = comp;
 796
 797                 /* Check whether a type has already been assigned. */
 798
 799                 if (DISP__NONE != dt && n->data.Bd->type != DISP__NONE)
 800                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_DISPREP))
 801                                 return(0);
 802
 803                 /* Make our type assignment. */
 804
 805                 if (DISP__NONE != dt && n->data.Bd->type == DISP__NONE)
 806                         n->data.Bd->type = dt;
 807         }
 808
 809         if (DISP__NONE == n->data.Bd->type) {
 810                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_DISPTYPE))
 811                         return(0);
 812                 n->data.Bd->type = DISP_ragged;
 813         }
 814
 815         return(1);
 816 }
 817
 818
 819 static int
 820 pre_ss(PRE_ARGS)
 821 {
 822
 823         if (MDOC_BLOCK != n->type)
 824                 return(1);
 825         return(check_parent(mdoc, n, MDOC_Sh, MDOC_BODY));
 826 }
 827
 828
 829 static int
 830 pre_sh(PRE_ARGS)
 831 {
 832
 833         if (MDOC_BLOCK != n->type)
 834                 return(1);
 835
 836         mdoc->regs->regs[(int)REG_nS].set = 0;
 837         return(check_parent(mdoc, n, MDOC_MAX, MDOC_ROOT));
 838 }
 839
 840
 841 static int
 842 pre_it(PRE_ARGS)
 843 {
 844
 845         if (MDOC_BLOCK != n->type)
 846                 return(1);
 847         /*
 848          * FIXME: this can probably be lifted if we make the It into
 849          * something else on-the-fly?
 850          */
 851         return(check_parent(mdoc, n, MDOC_Bl, MDOC_BODY));
 852 }
 853
 854
 855 static int
 856 pre_an(PRE_ARGS)
 857 {
 858
 859         if (NULL == n->args)
 860                 return(1);
 861         if (n->args->argc > 1)
 862                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_ARGCOUNT))
 863                         return(0);
 864
 865         if (MDOC_Split == n->args->argv[0].arg)
 866                 n->data.An.auth = AUTH_split;
 867         else if (MDOC_Nosplit == n->args->argv[0].arg)
 868                 n->data.An.auth = AUTH_nosplit;
 869         else
 870                 abort();
 871
 872         return(1);
 873 }
 874
 875
 876 static int
 877 pre_rv(PRE_ARGS)
 878 {
 879
 880         return(check_stdarg(mdoc, n));
 881 }
 882
 883
 884 static int
 885 post_dt(POST_ARGS)
 886 {
 887         const struct mdoc_node *nn;
 888         const char      *p;
 889
 890         if (NULL != (nn = mdoc->last->child))
 891                 for (p = nn->string; *p; p++) {
 892                         if (toupper((u_char)*p) == *p)
 893                                 continue;
 894                         if ( ! mdoc_nmsg(mdoc, nn, MANDOCERR_UPPERCASE))
 895                                 return(0);
 896                         break;
 897                 }
 898
 899         return(1);
 900 }
 901
 902
 903 static int
 904 pre_dt(PRE_ARGS)
 905 {
 906
 907         if (0 == mdoc->meta.date || mdoc->meta.os)
 908                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 909                         return(0);
 910         if (mdoc->meta.title)
 911                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 912                         return(0);
 913         return(1);
 914 }
 915
 916
 917 static int
 918 pre_os(PRE_ARGS)
 919 {
 920
 921         if (NULL == mdoc->meta.title || 0 == mdoc->meta.date)
 922                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 923                         return(0);
 924         if (mdoc->meta.os)
 925                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 926                         return(0);
 927         return(1);
 928 }
 929
 930
 931 static int
 932 pre_dd(PRE_ARGS)
 933 {
 934
 935         if (mdoc->meta.title || mdoc->meta.os)
 936                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGOOO))
 937                         return(0);
 938         if (mdoc->meta.date)
 939                 if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_PROLOGREP))
 940                         return(0);
 941         return(1);
 942 }
 943
 944
 945 static int
 946 post_bf(POST_ARGS)
 947 {
 948         struct mdoc_node *np;
 949         enum mdocargt     arg;
 950
 951         /*
 952          * Unlike other data pointers, these are "housed" by the HEAD
 953          * element, which contains the goods.
 954          */
 955
 956         if (MDOC_HEAD != mdoc->last->type) {
 957                 if (ENDBODY_NOT != mdoc->last->end) {
 958                         assert(mdoc->last->pending);
 959                         np = mdoc->last->pending->parent->head;
 960                 } else if (MDOC_BLOCK != mdoc->last->type) {
 961                         np = mdoc->last->parent->head;
 962                 } else
 963                         np = mdoc->last->head;
 964
 965                 assert(np);
 966                 assert(MDOC_HEAD == np->type);
 967                 assert(MDOC_Bf == np->tok);
 968                 assert(np->data.Bf);
 969                 mdoc->last->data.Bf = np->data.Bf;
 970                 return(1);
 971         }
 972
 973         np = mdoc->last;
 974         assert(MDOC_BLOCK == np->parent->type);
 975         assert(MDOC_Bf == np->parent->tok);
 976         np->data.Bf = mandoc_calloc(1, sizeof(struct mdoc_bf));
 977
 978         /*
 979          * Cannot have both argument and parameter.
 980          * If neither is specified, let it through with a warning.
 981          */
 982
 983         if (np->parent->args && np->child) {
 984                 mdoc_nmsg(mdoc, np, MANDOCERR_SYNTARGVCOUNT);
 985                 return(0);
 986         } else if (NULL == np->parent->args && NULL == np->child)
 987                 return(mdoc_nmsg(mdoc, np, MANDOCERR_FONTTYPE));
 988
 989         /* Extract argument into data. */
 990
 991         if (np->parent->args) {
 992                 arg = np->parent->args->argv[0].arg;
 993                 if (MDOC_Emphasis == arg)
 994                         np->data.Bf->font = FONT_Em;
 995                 else if (MDOC_Literal == arg)
 996                         np->data.Bf->font = FONT_Li;
 997                 else if (MDOC_Symbolic == arg)
 998                         np->data.Bf->font = FONT_Sy;
 999                 else
1000                         abort();
1001                 return(1);
1002         }
1003
1004         /* Extract parameter into data. */
1005
1006         if (0 == strcmp(np->child->string, "Em"))
1007                 np->data.Bf->font = FONT_Em;
1008         else if (0 == strcmp(np->child->string, "Li"))
1009                 np->data.Bf->font = FONT_Li;
1010         else if (0 == strcmp(np->child->string, "Sy"))
1011                 np->data.Bf->font = FONT_Sy;
1012         else if ( ! mdoc_nmsg(mdoc, np, MANDOCERR_FONTTYPE))
1013                 return(0);
1014
1015         return(1);
1016 }
1017
1018
1019 static int
1020 post_lb(POST_ARGS)
1021 {
1022
1023         if (mdoc_a2lib(mdoc->last->child->string))
1024                 return(1);
1025         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADLIB));
1026 }
1027
1028
1029 static int
1030 post_eoln(POST_ARGS)
1031 {
1032
1033         if (NULL == mdoc->last->child)
1034                 return(1);
1035         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGSLOST));
1036 }
1037
1038
1039 static int
1040 post_vt(POST_ARGS)
1041 {
1042         const struct mdoc_node *n;
1043
1044         /*
1045          * The Vt macro comes in both ELEM and BLOCK form, both of which
1046          * have different syntaxes (yet more context-sensitive
1047          * behaviour).  ELEM types must have a child; BLOCK types,
1048          * specifically the BODY, should only have TEXT children.
1049          */
1050
1051         if (MDOC_ELEM == mdoc->last->type)
1052                 return(eerr_ge1(mdoc));
1053         if (MDOC_BODY != mdoc->last->type)
1054                 return(1);
1055
1056         for (n = mdoc->last->child; n; n = n->next)
1057                 if (MDOC_TEXT != n->type)
1058                         if ( ! mdoc_nmsg(mdoc, n, MANDOCERR_CHILD))
1059                                 return(0);
1060
1061         return(1);
1062 }
1063
1064
1065 static int
1066 post_nm(POST_ARGS)
1067 {
1068
1069         if (mdoc->last->child)
1070                 return(1);
1071         if (mdoc->meta.name)
1072                 return(1);
1073         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NONAME));
1074 }
1075
1076
1077 static int
1078 post_at(POST_ARGS)
1079 {
1080
1081         if (NULL == mdoc->last->child)
1082                 return(1);
1083         assert(MDOC_TEXT == mdoc->last->child->type);
1084         if (mdoc_a2att(mdoc->last->child->string))
1085                 return(1);
1086         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADATT));
1087 }
1088
1089
1090 static int
1091 post_an(POST_ARGS)
1092 {
1093         struct mdoc_node *np;
1094
1095         np = mdoc->last;
1096         if (AUTH__NONE != np->data.An.auth && np->child)
1097                 return(mdoc_nmsg(mdoc, np, MANDOCERR_ARGCOUNT));
1098         if (AUTH__NONE != np->data.An.auth || np->child)
1099                 return(1);
1100         return(mdoc_nmsg(mdoc, np, MANDOCERR_NOARGS));
1101 }
1102
1103
1104 static int
1105 post_it(POST_ARGS)
1106 {
1107         int               i, cols, rc;
1108         enum mdoc_list    lt;
1109         struct mdoc_node *n, *c;
1110         enum mandocerr    er;
1111
1112         if (MDOC_BLOCK != mdoc->last->type)
1113                 return(1);
1114
1115         n = mdoc->last->parent->parent;
1116         assert(n->data.Bl);
1117         lt = n->data.Bl->type;
1118
1119         if (LIST__NONE == lt) {
1120                 mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_LISTTYPE);
1121                 return(0);
1122         }
1123
1124         switch (lt) {
1125         case (LIST_tag):
1126                 if (mdoc->last->head->child)
1127                         break;
1128                 /* FIXME: give this a dummy value. */
1129                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS))
1130                         return(0);
1131                 break;
1132         case (LIST_hang):
1133                 /* FALLTHROUGH */
1134         case (LIST_ohang):
1135                 /* FALLTHROUGH */
1136         case (LIST_inset):
1137                 /* FALLTHROUGH */
1138         case (LIST_diag):
1139                 if (NULL == mdoc->last->head->child)
1140                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOARGS))
1141                                 return(0);
1142                 break;
1143         case (LIST_bullet):
1144                 /* FALLTHROUGH */
1145         case (LIST_dash):
1146                 /* FALLTHROUGH */
1147         case (LIST_enum):
1148                 /* FALLTHROUGH */
1149         case (LIST_hyphen):
1150                 if (NULL == mdoc->last->body->child)
1151                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1152                                 return(0);
1153                 /* FALLTHROUGH */
1154         case (LIST_item):
1155                 if (mdoc->last->head->child)
1156                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_ARGSLOST))
1157                                 return(0);
1158                 break;
1159         case (LIST_column):
1160                 cols = (int)n->data.Bl->ncols;
1161
1162                 assert(NULL == mdoc->last->head->child);
1163
1164                 if (NULL == mdoc->last->body->child)
1165                         if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NOBODY))
1166                                 return(0);
1167
1168                 for (i = 0, c = mdoc->last->child; c; c = c->next)
1169                         if (MDOC_BODY == c->type)
1170                                 i++;
1171
1172                 if (i < cols)
1173                         er = MANDOCERR_ARGCOUNT;
1174                 else if (i == cols || i == cols + 1)
1175                         break;
1176                 else
1177                         er = MANDOCERR_SYNTARGCOUNT;
1178
1179                 rc = mdoc_vmsg(mdoc, er,
1180                                 mdoc->last->line, mdoc->last->pos,
1181                                 "columns == %d (have %d)", cols, i);
1182                 return(rc);
1183         default:
1184                 break;
1185         }
1186
1187         return(1);
1188 }
1189
1190
1191 static int
1192 post_bl_head(POST_ARGS)
1193 {
1194         int               i;
1195         struct mdoc_node *n;
1196
1197         assert(mdoc->last->parent);
1198         n = mdoc->last->parent;
1199
1200         if (LIST_column == n->data.Bl->type) {
1201                 if (n->data.Bl->ncols && mdoc->last->nchild) {
1202                         mdoc_nmsg(mdoc, n, MANDOCERR_COLUMNS);
1203                         return(0);
1204                 }
1205                 return(1);
1206         }
1207
1208         if (0 == (i = mdoc->last->nchild))
1209                 return(1);
1210         return(warn_count(mdoc, "==", 0, "line arguments", i));
1211 }
1212
1213
1214 static int
1215 post_bl(POST_ARGS)
1216 {
1217         struct mdoc_node        *n;
1218
1219         if (MDOC_HEAD == mdoc->last->type)
1220                 return(post_bl_head(mdoc));
1221         if (MDOC_BODY != mdoc->last->type)
1222                 return(1);
1223         if (NULL == mdoc->last->child)
1224                 return(1);
1225
1226         /*
1227          * We only allow certain children of `Bl'.  This is usually on
1228          * `It', but apparently `Sm' occurs here and there, so we let
1229          * that one through, too.
1230          */
1231
1232         /* LINTED */
1233         for (n = mdoc->last->child; n; n = n->next) {
1234                 if (MDOC_BLOCK == n->type && MDOC_It == n->tok)
1235                         continue;
1236                 if (MDOC_Sm == n->tok)
1237                         continue;
1238                 mdoc_nmsg(mdoc, n, MANDOCERR_SYNTCHILD);
1239                 return(0);
1240         }
1241
1242         return(1);
1243 }
1244
1245
1246 static int
1247 ebool(struct mdoc *mdoc)
1248 {
1249         struct mdoc_node *n;
1250
1251         /* LINTED */
1252         for (n = mdoc->last->child; n; n = n->next) {
1253                 if (MDOC_TEXT != n->type)
1254                         break;
1255                 if (0 == strcmp(n->string, "on"))
1256                         continue;
1257                 if (0 == strcmp(n->string, "off"))
1258                         continue;
1259                 break;
1260         }
1261
1262         if (NULL == n)
1263                 return(1);
1264         return(mdoc_nmsg(mdoc, n, MANDOCERR_BADBOOL));
1265 }
1266
1267
1268 static int
1269 post_root(POST_ARGS)
1270 {
1271
1272         if (NULL == mdoc->first->child)
1273                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1274         else if ( ! (MDOC_PBODY & mdoc->flags))
1275                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCPROLOG);
1276         else if (MDOC_BLOCK != mdoc->first->child->type)
1277                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1278         else if (MDOC_Sh != mdoc->first->child->tok)
1279                 mdoc_nmsg(mdoc, mdoc->first, MANDOCERR_NODOCBODY);
1280         else
1281                 return(1);
1282
1283         return(0);
1284 }
1285
1286
1287 static int
1288 post_st(POST_ARGS)
1289 {
1290
1291         if (mdoc_a2st(mdoc->last->child->string))
1292                 return(1);
1293         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADSTANDARD));
1294 }
1295
1296
1297 static int
1298 post_rs(POST_ARGS)
1299 {
1300         struct mdoc_node        *nn;
1301
1302         if (MDOC_BODY != mdoc->last->type)
1303                 return(1);
1304
1305         for (nn = mdoc->last->child; nn; nn = nn->next)
1306                 switch (nn->tok) {
1307                 case(MDOC__U):
1308                         /* FALLTHROUGH */
1309                 case(MDOC__Q):
1310                         /* FALLTHROUGH */
1311                 case(MDOC__C):
1312                         /* FALLTHROUGH */
1313                 case(MDOC__A):
1314                         /* FALLTHROUGH */
1315                 case(MDOC__B):
1316                         /* FALLTHROUGH */
1317                 case(MDOC__D):
1318                         /* FALLTHROUGH */
1319                 case(MDOC__I):
1320                         /* FALLTHROUGH */
1321                 case(MDOC__J):
1322                         /* FALLTHROUGH */
1323                 case(MDOC__N):
1324                         /* FALLTHROUGH */
1325                 case(MDOC__O):
1326                         /* FALLTHROUGH */
1327                 case(MDOC__P):
1328                         /* FALLTHROUGH */
1329                 case(MDOC__R):
1330                         /* FALLTHROUGH */
1331                 case(MDOC__T):
1332                         /* FALLTHROUGH */
1333                 case(MDOC__V):
1334                         break;
1335                 default:
1336                         mdoc_nmsg(mdoc, nn, MANDOCERR_SYNTCHILD);
1337                         return(0);
1338                 }
1339
1340         return(1);
1341 }
1342
1343
1344 static int
1345 post_sh(POST_ARGS)
1346 {
1347
1348         if (MDOC_HEAD == mdoc->last->type)
1349                 return(post_sh_head(mdoc));
1350         if (MDOC_BODY == mdoc->last->type)
1351                 return(post_sh_body(mdoc));
1352
1353         return(1);
1354 }
1355
1356
1357 static int
1358 post_sh_body(POST_ARGS)
1359 {
1360         struct mdoc_node *n;
1361
1362         if (SEC_NAME != mdoc->lastsec)
1363                 return(1);
1364
1365         /*
1366          * Warn if the NAME section doesn't contain the `Nm' and `Nd'
1367          * macros (can have multiple `Nm' and one `Nd').  Note that the
1368          * children of the BODY declaration can also be "text".
1369          */
1370
1371         if (NULL == (n = mdoc->last->child))
1372                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC));
1373
1374         for ( ; n && n->next; n = n->next) {
1375                 if (MDOC_ELEM == n->type && MDOC_Nm == n->tok)
1376                         continue;
1377                 if (MDOC_TEXT == n->type)
1378                         continue;
1379                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC))
1380                         return(0);
1381         }
1382
1383         assert(n);
1384         if (MDOC_BLOCK == n->type && MDOC_Nd == n->tok)
1385                 return(1);
1386         return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_BADNAMESEC));
1387 }
1388
1389
1390 static int
1391 post_sh_head(POST_ARGS)
1392 {
1393         char                    buf[BUFSIZ];
1394         enum mdoc_sec           sec;
1395         const struct mdoc_node *n;
1396
1397         /*
1398          * Process a new section.  Sections are either "named" or
1399          * "custom"; custom sections are user-defined, while named ones
1400          * usually follow a conventional order and may only appear in
1401          * certain manual sections.
1402          */
1403
1404         buf[0] = '\0';
1405
1406         /*
1407          * FIXME: yes, these can use a dynamic buffer, but I don't do so
1408          * in the interests of simplicity.
1409          */
1410
1411         for (n = mdoc->last->child; n; n = n->next) {
1412                 /* XXX - copied from compact(). */
1413                 assert(MDOC_TEXT == n->type);
1414
1415                 if (strlcat(buf, n->string, BUFSIZ) >= BUFSIZ) {
1416                         mdoc_nmsg(mdoc, n, MANDOCERR_MEM);
1417                         return(0);
1418                 }
1419                 if (NULL == n->next)
1420                         continue;
1421                 if (strlcat(buf, " ", BUFSIZ) >= BUFSIZ) {
1422                         mdoc_nmsg(mdoc, n, MANDOCERR_MEM);
1423                         return(0);
1424                 }
1425         }
1426
1427         sec = mdoc_str2sec(buf);
1428
1429         /*
1430          * Check: NAME should always be first, CUSTOM has no roles,
1431          * non-CUSTOM has a conventional order to be followed.
1432          */
1433
1434         if (SEC_NAME != sec && SEC_NONE == mdoc->lastnamed)
1435                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_NAMESECFIRST))
1436                         return(0);
1437
1438         if (SEC_CUSTOM == sec)
1439                 return(1);
1440
1441         if (sec == mdoc->lastnamed)
1442                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECREP))
1443                         return(0);
1444
1445         if (sec < mdoc->lastnamed)
1446                 if ( ! mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECOOO))
1447                         return(0);
1448
1449         /*
1450          * Check particular section/manual conventions.  LIBRARY can
1451          * only occur in manual section 2, 3, and 9.
1452          */
1453
1454         switch (sec) {
1455         case (SEC_LIBRARY):
1456                 assert(mdoc->meta.msec);
1457                 if (*mdoc->meta.msec == '2')
1458                         break;
1459                 if (*mdoc->meta.msec == '3')
1460                         break;
1461                 if (*mdoc->meta.msec == '9')
1462                         break;
1463                 return(mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_SECMSEC));
1464         default:
1465                 break;
1466         }
1467
1468         return(1);
1469 }
1470
1471
1472 static int
1473 pre_pp(PRE_ARGS)
1474 {
1475
1476         if (NULL == mdoc->last)
1477                 return(1);
1478
1479         /* Don't allow prior `Lp' or `Pp'. */
1480
1481         if (MDOC_Pp != mdoc->last->tok && MDOC_Lp != mdoc->last->tok)
1482                 return(1);
1483
1484         if (MDOC_Bl == n->tok && n->data.Bl->comp)
1485                 return(1);
1486         if (MDOC_Bd == n->tok && n->data.Bd->comp)
1487                 return(1);
1488
1489         mdoc_nmsg(mdoc, mdoc->last, MANDOCERR_IGNPAR);
1490         mdoc_node_delete(mdoc, mdoc->last);
1491         return(1);
1492 }