man_validate.c

   1 /*      $Id: man_validate.c,v 1.69 2011/04/13 09:57:08 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21
  22 #include <sys/types.h>
  23
  24 #include <assert.h>
  25 #include <ctype.h>
  26 #include <errno.h>
  27 #include <limits.h>
  28 #include <stdarg.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <time.h>
  32
  33 #include "man.h"
  34 #include "mandoc.h"
  35 #include "libman.h"
  36 #include "libmandoc.h"
  37
  38 #define CHKARGS   struct man *m, struct man_node *n
  39
  40 typedef int     (*v_check)(CHKARGS);
  41
  42 struct  man_valid {
  43         v_check  *pres;
  44         v_check  *posts;
  45 };
  46
  47 static  int       check_bline(CHKARGS);
  48 static  int       check_eq0(CHKARGS);
  49 static  int       check_ft(CHKARGS);
  50 static  int       check_le1(CHKARGS);
  51 static  int       check_ge2(CHKARGS);
  52 static  int       check_le5(CHKARGS);
  53 static  int       check_par(CHKARGS);
  54 static  int       check_part(CHKARGS);
  55 static  int       check_root(CHKARGS);
  56 static  int       check_sec(CHKARGS);
  57 static  void      check_text(CHKARGS);
  58
  59 static  int       post_AT(CHKARGS);
  60 static  int       post_fi(CHKARGS);
  61 static  int       post_nf(CHKARGS);
  62 static  int       post_TH(CHKARGS);
  63 static  int       post_UC(CHKARGS);
  64
  65 static  v_check   posts_at[] = { post_AT, NULL };
  66 static  v_check   posts_eq0[] = { check_eq0, NULL };
  67 static  v_check   posts_fi[] = { check_eq0, post_fi, NULL };
  68 static  v_check   posts_le1[] = { check_le1, NULL };
  69 static  v_check   posts_ft[] = { check_ft, NULL };
  70 static  v_check   posts_nf[] = { check_eq0, post_nf, NULL };
  71 static  v_check   posts_par[] = { check_par, NULL };
  72 static  v_check   posts_part[] = { check_part, NULL };
  73 static  v_check   posts_sec[] = { check_sec, NULL };
  74 static  v_check   posts_th[] = { check_ge2, check_le5, post_TH, NULL };
  75 static  v_check   posts_uc[] = { post_UC, NULL };
  76 static  v_check   pres_bline[] = { check_bline, NULL };
  77
  78
  79 static  const struct man_valid man_valids[MAN_MAX] = {
  80         { NULL, posts_eq0 }, /* br */
  81         { pres_bline, posts_th }, /* TH */
  82         { pres_bline, posts_sec }, /* SH */
  83         { pres_bline, posts_sec }, /* SS */
  84         { pres_bline, NULL }, /* TP */
  85         { pres_bline, posts_par }, /* LP */
  86         { pres_bline, posts_par }, /* PP */
  87         { pres_bline, posts_par }, /* P */
  88         { pres_bline, NULL }, /* IP */
  89         { pres_bline, NULL }, /* HP */
  90         { NULL, NULL }, /* SM */
  91         { NULL, NULL }, /* SB */
  92         { NULL, NULL }, /* BI */
  93         { NULL, NULL }, /* IB */
  94         { NULL, NULL }, /* BR */
  95         { NULL, NULL }, /* RB */
  96         { NULL, NULL }, /* R */
  97         { NULL, NULL }, /* B */
  98         { NULL, NULL }, /* I */
  99         { NULL, NULL }, /* IR */
 100         { NULL, NULL }, /* RI */
 101         { NULL, posts_eq0 }, /* na */ /* FIXME: should warn only. */
 102         { NULL, posts_le1 }, /* sp */ /* FIXME: should warn only. */
 103         { pres_bline, posts_nf }, /* nf */
 104         { pres_bline, posts_fi }, /* fi */
 105         { NULL, NULL }, /* RE */
 106         { NULL, posts_part }, /* RS */
 107         { NULL, NULL }, /* DT */
 108         { NULL, posts_uc }, /* UC */
 109         { NULL, NULL }, /* PD */
 110         { NULL, posts_at }, /* AT */
 111         { NULL, NULL }, /* in */
 112         { NULL, posts_ft }, /* ft */
 113 };
 114
 115
 116 int
 117 man_valid_pre(struct man *m, struct man_node *n)
 118 {
 119         v_check         *cp;
 120
 121         switch (n->type) {
 122         case (MAN_TEXT):
 123                 /* FALLTHROUGH */
 124         case (MAN_ROOT):
 125                 /* FALLTHROUGH */
 126         case (MAN_EQN):
 127                 /* FALLTHROUGH */
 128         case (MAN_TBL):
 129                 return(1);
 130         default:
 131                 break;
 132         }
 133
 134         if (NULL == (cp = man_valids[n->tok].pres))
 135                 return(1);
 136         for ( ; *cp; cp++)
 137                 if ( ! (*cp)(m, n))
 138                         return(0);
 139         return(1);
 140 }
 141
 142
 143 int
 144 man_valid_post(struct man *m)
 145 {
 146         v_check         *cp;
 147
 148         if (MAN_VALID & m->last->flags)
 149                 return(1);
 150         m->last->flags |= MAN_VALID;
 151
 152         switch (m->last->type) {
 153         case (MAN_TEXT):
 154                 check_text(m, m->last);
 155                 return(1);
 156         case (MAN_ROOT):
 157                 return(check_root(m, m->last));
 158         case (MAN_EQN):
 159                 /* FALLTHROUGH */
 160         case (MAN_TBL):
 161                 return(1);
 162         default:
 163                 break;
 164         }
 165
 166         if (NULL == (cp = man_valids[m->last->tok].posts))
 167                 return(1);
 168         for ( ; *cp; cp++)
 169                 if ( ! (*cp)(m, m->last))
 170                         return(0);
 171
 172         return(1);
 173 }
 174
 175
 176 static int
 177 check_root(CHKARGS)
 178 {
 179
 180         if (MAN_BLINE & m->flags)
 181                 man_nmsg(m, n, MANDOCERR_SCOPEEXIT);
 182         else if (MAN_ELINE & m->flags)
 183                 man_nmsg(m, n, MANDOCERR_SCOPEEXIT);
 184
 185         m->flags &= ~MAN_BLINE;
 186         m->flags &= ~MAN_ELINE;
 187
 188         if (NULL == m->first->child) {
 189                 man_nmsg(m, n, MANDOCERR_NODOCBODY);
 190                 return(0);
 191         } else if (NULL == m->meta.title) {
 192                 man_nmsg(m, n, MANDOCERR_NOTITLE);
 193
 194                 /*
 195                  * If a title hasn't been set, do so now (by
 196                  * implication, date and section also aren't set).
 197                  */
 198
 199                 m->meta.title = mandoc_strdup("unknown");
 200                 m->meta.msec = mandoc_strdup("1");
 201                 m->meta.date = mandoc_normdate
 202                         (m->parse, NULL, n->line, n->pos);
 203         }
 204
 205         return(1);
 206 }
 207
 208 static void
 209 check_text(CHKARGS)
 210 {
 211         char            *p, *pp, *cpp;
 212         int              pos;
 213         size_t           sz;
 214
 215         p = n->string;
 216         pos = n->pos + 1;
 217
 218         while ('\0' != *p) {
 219                 sz = strcspn(p, "\t\\");
 220
 221                 p += (int)sz;
 222                 pos += (int)sz;
 223
 224                 if ('\t' == *p) {
 225                         if ( ! (MAN_LITERAL & m->flags))
 226                                 man_pmsg(m, n->line, pos, MANDOCERR_BADTAB);
 227                         p++;
 228                         pos++;
 229                         continue;
 230                 } else if ('\0' == *p)
 231                         break;
 232
 233                 pos++;
 234                 pp = ++p;
 235
 236                 if (ESCAPE_ERROR == mandoc_escape
 237                                 ((const char **)&pp, NULL, NULL)) {
 238                         man_pmsg(m, n->line, pos, MANDOCERR_BADESCAPE);
 239                         break;
 240                 }
 241
 242                 cpp = p;
 243                 while (NULL != (cpp = memchr(cpp, ASCII_HYPH, pp - cpp)))
 244                         *cpp = '-';
 245
 246                 pos += pp - p;
 247                 p = pp;
 248         }
 249 }
 250
 251 #define INEQ_DEFINE(x, ineq, name) \
 252 static int \
 253 check_##name(CHKARGS) \
 254 { \
 255         if (n->nchild ineq (x)) \
 256                 return(1); \
 257         mandoc_vmsg(MANDOCERR_ARGCOUNT, m->parse, n->line, n->pos, \
 258                         "line arguments %s %d (have %d)", \
 259                         #ineq, (x), n->nchild); \
 260         return(1); \
 261 }
 262
 263 INEQ_DEFINE(0, ==, eq0)
 264 INEQ_DEFINE(1, <=, le1)
 265 INEQ_DEFINE(2, >=, ge2)
 266 INEQ_DEFINE(5, <=, le5)
 267
 268 static int
 269 check_ft(CHKARGS)
 270 {
 271         char    *cp;
 272         int      ok;
 273
 274         if (0 == n->nchild)
 275                 return(1);
 276
 277         ok = 0;
 278         cp = n->child->string;
 279         switch (*cp) {
 280         case ('1'):
 281                 /* FALLTHROUGH */
 282         case ('2'):
 283                 /* FALLTHROUGH */
 284         case ('3'):
 285                 /* FALLTHROUGH */
 286         case ('4'):
 287                 /* FALLTHROUGH */
 288         case ('I'):
 289                 /* FALLTHROUGH */
 290         case ('P'):
 291                 /* FALLTHROUGH */
 292         case ('R'):
 293                 if ('\0' == cp[1])
 294                         ok = 1;
 295                 break;
 296         case ('B'):
 297                 if ('\0' == cp[1] || ('I' == cp[1] && '\0' == cp[2]))
 298                         ok = 1;
 299                 break;
 300         case ('C'):
 301                 if ('W' == cp[1] && '\0' == cp[2])
 302                         ok = 1;
 303                 break;
 304         default:
 305                 break;
 306         }
 307
 308         if (0 == ok) {
 309                 mandoc_vmsg
 310                         (MANDOCERR_BADFONT, m->parse,
 311                          n->line, n->pos, "%s", cp);
 312                 *cp = '\0';
 313         }
 314
 315         if (1 < n->nchild)
 316                 mandoc_vmsg
 317                         (MANDOCERR_ARGCOUNT, m->parse, n->line,
 318                          n->pos, "want one child (have %d)",
 319                          n->nchild);
 320
 321         return(1);
 322 }
 323
 324 static int
 325 check_sec(CHKARGS)
 326 {
 327
 328         if ( ! (MAN_HEAD == n->type && 0 == n->nchild))
 329                 return(1);
 330
 331         man_nmsg(m, n, MANDOCERR_SYNTARGCOUNT);
 332         return(0);
 333 }
 334
 335
 336 static int
 337 check_part(CHKARGS)
 338 {
 339
 340         if (MAN_BODY == n->type && 0 == n->nchild)
 341                 mandoc_msg(MANDOCERR_ARGCWARN, m->parse, n->line,
 342                                 n->pos, "want children (have none)");
 343
 344         return(1);
 345 }
 346
 347
 348 static int
 349 check_par(CHKARGS)
 350 {
 351
 352         switch (n->type) {
 353         case (MAN_BLOCK):
 354                 if (0 == n->body->nchild)
 355                         man_node_delete(m, n);
 356                 break;
 357         case (MAN_BODY):
 358                 if (0 == n->nchild)
 359                         man_nmsg(m, n, MANDOCERR_IGNPAR);
 360                 break;
 361         case (MAN_HEAD):
 362                 if (n->nchild)
 363                         man_nmsg(m, n, MANDOCERR_ARGSLOST);
 364                 break;
 365         default:
 366                 break;
 367         }
 368
 369         return(1);
 370 }
 371
 372
 373 static int
 374 check_bline(CHKARGS)
 375 {
 376
 377         assert( ! (MAN_ELINE & m->flags));
 378         if (MAN_BLINE & m->flags) {
 379                 man_nmsg(m, n, MANDOCERR_SYNTLINESCOPE);
 380                 return(0);
 381         }
 382
 383         return(1);
 384 }
 385
 386 static int
 387 post_TH(CHKARGS)
 388 {
 389         const char      *p;
 390         int              line, pos;
 391
 392         if (m->meta.title)
 393                 free(m->meta.title);
 394         if (m->meta.vol)
 395                 free(m->meta.vol);
 396         if (m->meta.source)
 397                 free(m->meta.source);
 398         if (m->meta.msec)
 399                 free(m->meta.msec);
 400         if (m->meta.date)
 401                 free(m->meta.date);
 402
 403         line = n->line;
 404         pos = n->pos;
 405         m->meta.title = m->meta.vol = m->meta.date =
 406                 m->meta.msec = m->meta.source = NULL;
 407
 408         /* ->TITLE<- MSEC DATE SOURCE VOL */
 409
 410         n = n->child;
 411         if (n && n->string) {
 412                 for (p = n->string; '\0' != *p; p++) {
 413                         /* Only warn about this once... */
 414                         if (isalpha((u_char)*p) && ! isupper((u_char)*p)) {
 415                                 man_nmsg(m, n, MANDOCERR_UPPERCASE);
 416                                 break;
 417                         }
 418                 }
 419                 m->meta.title = mandoc_strdup(n->string);
 420         } else
 421                 m->meta.title = mandoc_strdup("");
 422
 423         /* TITLE ->MSEC<- DATE SOURCE VOL */
 424
 425         if (n)
 426                 n = n->next;
 427         if (n && n->string)
 428                 m->meta.msec = mandoc_strdup(n->string);
 429         else
 430                 m->meta.msec = mandoc_strdup("");
 431
 432         /* TITLE MSEC ->DATE<- SOURCE VOL */
 433
 434         if (n)
 435                 n = n->next;
 436         if (n)
 437                 pos = n->pos;
 438         m->meta.date = mandoc_normdate
 439                 (m->parse, n ? n->string : NULL, line, pos);
 440
 441         /* TITLE MSEC DATE ->SOURCE<- VOL */
 442
 443         if (n && (n = n->next))
 444                 m->meta.source = mandoc_strdup(n->string);
 445
 446         /* TITLE MSEC DATE SOURCE ->VOL<- */
 447
 448         if (n && (n = n->next))
 449                 m->meta.vol = mandoc_strdup(n->string);
 450
 451         /*
 452          * Remove the `TH' node after we've processed it for our
 453          * meta-data.
 454          */
 455         man_node_delete(m, m->last);
 456         return(1);
 457 }
 458
 459 static int
 460 post_nf(CHKARGS)
 461 {
 462
 463         if (MAN_LITERAL & m->flags)
 464                 man_nmsg(m, n, MANDOCERR_SCOPEREP);
 465
 466         m->flags |= MAN_LITERAL;
 467         return(1);
 468 }
 469
 470 static int
 471 post_fi(CHKARGS)
 472 {
 473
 474         if ( ! (MAN_LITERAL & m->flags))
 475                 man_nmsg(m, n, MANDOCERR_WNOSCOPE);
 476
 477         m->flags &= ~MAN_LITERAL;
 478         return(1);
 479 }
 480
 481 static int
 482 post_UC(CHKARGS)
 483 {
 484         static const char * const bsd_versions[] = {
 485             "3rd Berkeley Distribution",
 486             "4th Berkeley Distribution",
 487             "4.2 Berkeley Distribution",
 488             "4.3 Berkeley Distribution",
 489             "4.4 Berkeley Distribution",
 490         };
 491
 492         const char      *p, *s;
 493
 494         n = n->child;
 495         n = m->last->child;
 496
 497         if (NULL == n || MAN_TEXT != n->type)
 498                 p = bsd_versions[0];
 499         else {
 500                 s = n->string;
 501                 if (0 == strcmp(s, "3"))
 502                         p = bsd_versions[0];
 503                 else if (0 == strcmp(s, "4"))
 504                         p = bsd_versions[1];
 505                 else if (0 == strcmp(s, "5"))
 506                         p = bsd_versions[2];
 507                 else if (0 == strcmp(s, "6"))
 508                         p = bsd_versions[3];
 509                 else if (0 == strcmp(s, "7"))
 510                         p = bsd_versions[4];
 511                 else
 512                         p = bsd_versions[0];
 513         }
 514
 515         if (m->meta.source)
 516                 free(m->meta.source);
 517
 518         m->meta.source = mandoc_strdup(p);
 519         return(1);
 520 }
 521
 522 static int
 523 post_AT(CHKARGS)
 524 {
 525         static const char * const unix_versions[] = {
 526             "7th Edition",
 527             "System III",
 528             "System V",
 529             "System V Release 2",
 530         };
 531
 532         const char      *p, *s;
 533         struct man_node *nn;
 534
 535         n = n->child;
 536
 537         if (NULL == n || MAN_TEXT != n->type)
 538                 p = unix_versions[0];
 539         else {
 540                 s = n->string;
 541                 if (0 == strcmp(s, "3"))
 542                         p = unix_versions[0];
 543                 else if (0 == strcmp(s, "4"))
 544                         p = unix_versions[1];
 545                 else if (0 == strcmp(s, "5")) {
 546                         nn = n->next;
 547                         if (nn && MAN_TEXT == nn->type && nn->string[0])
 548                                 p = unix_versions[3];
 549                         else
 550                                 p = unix_versions[2];
 551                 } else
 552                         p = unix_versions[0];
 553         }
 554
 555         if (m->meta.source)
 556                 free(m->meta.source);
 557
 558         m->meta.source = mandoc_strdup(p);
 559         return(1);
 560 }