read.c

   1 /*      $Id: read.c,v 1.7 2011/03/28 21:49:42 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010, 2011 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 #include <sys/stat.h>
  19 #include <sys/mman.h>
  20
  21 #include <assert.h>
  22 #include <ctype.h>
  23 #include <fcntl.h>
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29
  30 #include "mandoc.h"
  31 #include "libmandoc.h"
  32 #include "mdoc.h"
  33 #include "man.h"
  34
  35 #ifndef MAP_FILE
  36 #define MAP_FILE        0
  37 #endif
  38
  39 #define REPARSE_LIMIT   1000
  40
  41 struct  buf {
  42         char             *buf; /* binary input buffer */
  43         size_t            sz; /* size of binary buffer */
  44 };
  45
  46 struct  mparse {
  47         enum mandoclevel  file_status; /* status of current parse */
  48         enum mandoclevel  wlevel; /* ignore messages below this */
  49         int               line; /* line number in the file */
  50         enum mparset      inttype; /* which parser to use */
  51         struct man       *pman; /* persistent man parser */
  52         struct mdoc      *pmdoc; /* persistent mdoc parser */
  53         struct man       *man; /* man parser */
  54         struct mdoc      *mdoc; /* mdoc parser */
  55         struct roff      *roff; /* roff parser (!NULL) */
  56         struct regset     regs; /* roff registers */
  57         int               reparse_count; /* finite interp. stack */
  58         mandocmsg         mmsg; /* warning/error message handler */
  59         void             *arg; /* argument to mmsg */
  60         const char       *file;
  61 };
  62
  63 static  void      resize_buf(struct buf *, size_t);
  64 static  void      mparse_buf_r(struct mparse *, struct buf, int);
  65 static  void      mparse_readfd_r(struct mparse *, int, const char *, int);
  66 static  void      pset(const char *, int, struct mparse *);
  67 static  void      pdesc(struct mparse *, const char *, int);
  68 static  int       read_whole_file(const char *, int, struct buf *, int *);
  69 static  void      mparse_end(struct mparse *);
  70
  71 static  const enum mandocerr    mandoclimits[MANDOCLEVEL_MAX] = {
  72         MANDOCERR_OK,
  73         MANDOCERR_WARNING,
  74         MANDOCERR_WARNING,
  75         MANDOCERR_ERROR,
  76         MANDOCERR_FATAL,
  77         MANDOCERR_MAX,
  78         MANDOCERR_MAX
  79 };
  80
  81 static  const char * const      mandocerrs[MANDOCERR_MAX] = {
  82         "ok",
  83
  84         "generic warning",
  85
  86         /* related to the prologue */
  87         "no title in document",
  88         "document title should be all caps",
  89         "unknown manual section",
  90         "date missing, using today's date",
  91         "cannot parse date, using it verbatim",
  92         "prologue macros out of order",
  93         "duplicate prologue macro",
  94         "macro not allowed in prologue",
  95         "macro not allowed in body",
  96
  97         /* related to document structure */
  98         ".so is fragile, better use ln(1)",
  99         "NAME section must come first",
 100         "bad NAME section contents",
 101         "manual name not yet set",
 102         "sections out of conventional order",
 103         "duplicate section name",
 104         "section not in conventional manual section",
 105
 106         /* related to macros and nesting */
 107         "skipping obsolete macro",
 108         "skipping paragraph macro",
 109         "skipping no-space macro",
 110         "blocks badly nested",
 111         "child violates parent syntax",
 112         "nested displays are not portable",
 113         "already in literal mode",
 114         "line scope broken",
 115
 116         /* related to missing macro arguments */
 117         "skipping empty macro",
 118         "argument count wrong",
 119         "missing display type",
 120         "list type must come first",
 121         "tag lists require a width argument",
 122         "missing font type",
 123         "skipping end of block that is not open",
 124
 125         /* related to bad macro arguments */
 126         "skipping argument",
 127         "duplicate argument",
 128         "duplicate display type",
 129         "duplicate list type",
 130         "unknown AT&T UNIX version",
 131         "bad Boolean value",
 132         "unknown font",
 133         "unknown standard specifier",
 134         "bad width argument",
 135
 136         /* related to plain text */
 137         "blank line in non-literal context",
 138         "tab in non-literal context",
 139         "end of line whitespace",
 140         "bad comment style",
 141         "unknown escape sequence",
 142         "unterminated quoted string",
 143
 144         "generic error",
 145
 146         /* related to tables */
 147         "bad table syntax",
 148         "bad table option",
 149         "bad table layout",
 150         "no table layout cells specified",
 151         "no table data cells specified",
 152         "ignore data in cell",
 153         "data block still open",
 154         "ignoring extra data cells",
 155
 156         "input stack limit exceeded, infinite loop?",
 157         "skipping bad character",
 158         "escaped character not allowed in a name",
 159         "skipping text before the first section header",
 160         "skipping unknown macro",
 161         "NOT IMPLEMENTED, please use groff: skipping request",
 162         "argument count wrong",
 163         "skipping end of block that is not open",
 164         "missing end of block",
 165         "scope open on exit",
 166         "uname(3) system call failed",
 167         "macro requires line argument(s)",
 168         "macro requires body argument(s)",
 169         "macro requires argument(s)",
 170         "missing list type",
 171         "line argument(s) will be lost",
 172         "body argument(s) will be lost",
 173
 174         "generic fatal error",
 175
 176         "not a manual",
 177         "column syntax is inconsistent",
 178         "NOT IMPLEMENTED: .Bd -file",
 179         "line scope broken, syntax violated",
 180         "argument count wrong, violates syntax",
 181         "child violates parent syntax",
 182         "argument count wrong, violates syntax",
 183         "NOT IMPLEMENTED: .so with absolute path or \"..\"",
 184         "no document body",
 185         "no document prologue",
 186         "static buffer exhausted",
 187 };
 188
 189 static  const char * const      mandoclevels[MANDOCLEVEL_MAX] = {
 190         "SUCCESS",
 191         "RESERVED",
 192         "WARNING",
 193         "ERROR",
 194         "FATAL",
 195         "BADARG",
 196         "SYSERR"
 197 };
 198
 199 static void
 200 resize_buf(struct buf *buf, size_t initial)
 201 {
 202
 203         buf->sz = buf->sz > initial/2 ? 2 * buf->sz : initial;
 204         buf->buf = mandoc_realloc(buf->buf, buf->sz);
 205 }
 206
 207 static void
 208 pset(const char *buf, int pos, struct mparse *curp)
 209 {
 210         int              i;
 211
 212         /*
 213          * Try to intuit which kind of manual parser should be used.  If
 214          * passed in by command-line (-man, -mdoc), then use that
 215          * explicitly.  If passed as -mandoc, then try to guess from the
 216          * line: either skip dot-lines, use -mdoc when finding `.Dt', or
 217          * default to -man, which is more lenient.
 218          *
 219          * Separate out pmdoc/pman from mdoc/man: the first persists
 220          * through all parsers, while the latter is used per-parse.
 221          */
 222
 223         if ('.' == buf[0] || '\'' == buf[0]) {
 224                 for (i = 1; buf[i]; i++)
 225                         if (' ' != buf[i] && '\t' != buf[i])
 226                                 break;
 227                 if ('\0' == buf[i])
 228                         return;
 229         }
 230
 231         switch (curp->inttype) {
 232         case (MPARSE_MDOC):
 233                 if (NULL == curp->pmdoc)
 234                         curp->pmdoc = mdoc_alloc(&curp->regs, curp);
 235                 assert(curp->pmdoc);
 236                 curp->mdoc = curp->pmdoc;
 237                 return;
 238         case (MPARSE_MAN):
 239                 if (NULL == curp->pman)
 240                         curp->pman = man_alloc(&curp->regs, curp);
 241                 assert(curp->pman);
 242                 curp->man = curp->pman;
 243                 return;
 244         default:
 245                 break;
 246         }
 247
 248         if (pos >= 3 && 0 == memcmp(buf, ".Dd", 3))  {
 249                 if (NULL == curp->pmdoc)
 250                         curp->pmdoc = mdoc_alloc(&curp->regs, curp);
 251                 assert(curp->pmdoc);
 252                 curp->mdoc = curp->pmdoc;
 253                 return;
 254         }
 255
 256         if (NULL == curp->pman)
 257                 curp->pman = man_alloc(&curp->regs, curp);
 258         assert(curp->pman);
 259         curp->man = curp->pman;
 260 }
 261
 262 /*
 263  * Main parse routine for an opened file.  This is called for each
 264  * opened file and simply loops around the full input file, possibly
 265  * nesting (i.e., with `so').
 266  */
 267 static void
 268 mparse_buf_r(struct mparse *curp, struct buf blk, int start)
 269 {
 270         const struct tbl_span   *span;
 271         struct buf       ln;
 272         enum rofferr     rr;
 273         int              i, of, rc;
 274         int              pos; /* byte number in the ln buffer */
 275         int              lnn; /* line number in the real file */
 276         unsigned char    c;
 277
 278         memset(&ln, 0, sizeof(struct buf));
 279
 280         lnn = curp->line;
 281         pos = 0;
 282
 283         for (i = 0; i < (int)blk.sz; ) {
 284                 if (0 == pos && '\0' == blk.buf[i])
 285                         break;
 286
 287                 if (start) {
 288                         curp->line = lnn;
 289                         curp->reparse_count = 0;
 290                 }
 291
 292                 while (i < (int)blk.sz && (start || '\0' != blk.buf[i])) {
 293
 294                         /*
 295                          * When finding an unescaped newline character,
 296                          * leave the character loop to process the line.
 297                          * Skip a preceding carriage return, if any.
 298                          */
 299
 300                         if ('\r' == blk.buf[i] && i + 1 < (int)blk.sz &&
 301                             '\n' == blk.buf[i + 1])
 302                                 ++i;
 303                         if ('\n' == blk.buf[i]) {
 304                                 ++i;
 305                                 ++lnn;
 306                                 break;
 307                         }
 308
 309                         /*
 310                          * Warn about bogus characters.  If you're using
 311                          * non-ASCII encoding, you're screwing your
 312                          * readers.  Since I'd rather this not happen,
 313                          * I'll be helpful and drop these characters so
 314                          * we don't display gibberish.  Note to manual
 315                          * writers: use special characters.
 316                          */
 317
 318                         c = (unsigned char) blk.buf[i];
 319
 320                         if ( ! (isascii(c) &&
 321                                         (isgraph(c) || isblank(c)))) {
 322                                 mandoc_msg(MANDOCERR_BADCHAR, curp,
 323                                                 curp->line, pos, "ignoring byte");
 324                                 i++;
 325                                 continue;
 326                         }
 327
 328                         /* Trailing backslash = a plain char. */
 329
 330                         if ('\\' != blk.buf[i] || i + 1 == (int)blk.sz) {
 331                                 if (pos >= (int)ln.sz)
 332                                         resize_buf(&ln, 256);
 333                                 ln.buf[pos++] = blk.buf[i++];
 334                                 continue;
 335                         }
 336
 337                         /*
 338                          * Found escape and at least one other character.
 339                          * When it's a newline character, skip it.
 340                          * When there is a carriage return in between,
 341                          * skip that one as well.
 342                          */
 343
 344                         if ('\r' == blk.buf[i + 1] && i + 2 < (int)blk.sz &&
 345                             '\n' == blk.buf[i + 2])
 346                                 ++i;
 347                         if ('\n' == blk.buf[i + 1]) {
 348                                 i += 2;
 349                                 ++lnn;
 350                                 continue;
 351                         }
 352
 353                         if ('"' == blk.buf[i + 1]) {
 354                                 i += 2;
 355                                 /* Comment, skip to end of line */
 356                                 for (; i < (int)blk.sz; ++i) {
 357                                         if ('\n' == blk.buf[i]) {
 358                                                 ++i;
 359                                                 ++lnn;
 360                                                 break;
 361                                         }
 362                                 }
 363
 364                                 /* Backout trailing whitespaces */
 365                                 for (; pos > 0; --pos) {
 366                                         if (ln.buf[pos - 1] != ' ')
 367                                                 break;
 368                                         if (pos > 2 && ln.buf[pos - 2] == '\\')
 369                                                 break;
 370                                 }
 371                                 break;
 372                         }
 373
 374                         /* Some other escape sequence, copy & cont. */
 375
 376                         if (pos + 1 >= (int)ln.sz)
 377                                 resize_buf(&ln, 256);
 378
 379                         ln.buf[pos++] = blk.buf[i++];
 380                         ln.buf[pos++] = blk.buf[i++];
 381                 }
 382
 383                 if (pos >= (int)ln.sz)
 384                         resize_buf(&ln, 256);
 385
 386                 ln.buf[pos] = '\0';
 387
 388                 /*
 389                  * A significant amount of complexity is contained by
 390                  * the roff preprocessor.  It's line-oriented but can be
 391                  * expressed on one line, so we need at times to
 392                  * readjust our starting point and re-run it.  The roff
 393                  * preprocessor can also readjust the buffers with new
 394                  * data, so we pass them in wholesale.
 395                  */
 396
 397                 of = 0;
 398
 399 rerun:
 400                 rr = roff_parseln
 401                         (curp->roff, curp->line,
 402                          &ln.buf, &ln.sz, of, &of);
 403
 404                 switch (rr) {
 405                 case (ROFF_REPARSE):
 406                         if (REPARSE_LIMIT >= ++curp->reparse_count)
 407                                 mparse_buf_r(curp, ln, 0);
 408                         else
 409                                 mandoc_msg(MANDOCERR_ROFFLOOP, curp,
 410                                         curp->line, pos, NULL);
 411                         pos = 0;
 412                         continue;
 413                 case (ROFF_APPEND):
 414                         pos = (int)strlen(ln.buf);
 415                         continue;
 416                 case (ROFF_RERUN):
 417                         goto rerun;
 418                 case (ROFF_IGN):
 419                         pos = 0;
 420                         continue;
 421                 case (ROFF_ERR):
 422                         assert(MANDOCLEVEL_FATAL <= curp->file_status);
 423                         break;
 424                 case (ROFF_SO):
 425                         mparse_readfd_r(curp, -1, ln.buf + of, 1);
 426                         if (MANDOCLEVEL_FATAL <= curp->file_status)
 427                                 break;
 428                         pos = 0;
 429                         continue;
 430                 default:
 431                         break;
 432                 }
 433
 434                 /*
 435                  * If we encounter errors in the recursive parse, make
 436                  * sure we don't continue parsing.
 437                  */
 438
 439                 if (MANDOCLEVEL_FATAL <= curp->file_status)
 440                         break;
 441
 442                 /*
 443                  * If input parsers have not been allocated, do so now.
 444                  * We keep these instanced betwen parsers, but set them
 445                  * locally per parse routine since we can use different
 446                  * parsers with each one.
 447                  */
 448
 449                 if ( ! (curp->man || curp->mdoc))
 450                         pset(ln.buf + of, pos - of, curp);
 451
 452                 /*
 453                  * Lastly, push down into the parsers themselves.  One
 454                  * of these will have already been set in the pset()
 455                  * routine.
 456                  * If libroff returns ROFF_TBL, then add it to the
 457                  * currently open parse.  Since we only get here if
 458                  * there does exist data (see tbl_data.c), we're
 459                  * guaranteed that something's been allocated.
 460                  * Do the same for ROFF_EQN.
 461                  */
 462
 463                 rc = -1;
 464
 465                 if (ROFF_TBL == rr)
 466                         while (NULL != (span = roff_span(curp->roff))) {
 467                                 rc = curp->man ?
 468                                         man_addspan(curp->man, span) :
 469                                         mdoc_addspan(curp->mdoc, span);
 470                                 if (0 == rc)
 471                                         break;
 472                         }
 473                 else if (ROFF_EQN == rr)
 474                         rc = curp->mdoc ?
 475                                 mdoc_addeqn(curp->mdoc,
 476                                         roff_eqn(curp->roff)) :
 477                                 man_addeqn(curp->man,
 478                                         roff_eqn(curp->roff));
 479                 else if (curp->man || curp->mdoc)
 480                         rc = curp->man ?
 481                                 man_parseln(curp->man,
 482                                         curp->line, ln.buf, of) :
 483                                 mdoc_parseln(curp->mdoc,
 484                                         curp->line, ln.buf, of);
 485
 486                 if (0 == rc) {
 487                         assert(MANDOCLEVEL_FATAL <= curp->file_status);
 488                         break;
 489                 }
 490
 491                 /* Temporary buffers typically are not full. */
 492
 493                 if (0 == start && '\0' == blk.buf[i])
 494                         break;
 495
 496                 /* Start the next input line. */
 497
 498                 pos = 0;
 499         }
 500
 501         free(ln.buf);
 502 }
 503
 504 static void
 505 pdesc(struct mparse *curp, const char *file, int fd)
 506 {
 507         struct buf       blk;
 508         int              with_mmap;
 509
 510         /*
 511          * Run for each opened file; may be called more than once for
 512          * each full parse sequence if the opened file is nested (i.e.,
 513          * from `so').  Simply sucks in the whole file and moves into
 514          * the parse phase for the file.
 515          */
 516
 517         if ( ! read_whole_file(file, fd, &blk, &with_mmap)) {
 518                 curp->file_status = MANDOCLEVEL_SYSERR;
 519                 return;
 520         }
 521
 522         /* Line number is per-file. */
 523
 524         curp->line = 1;
 525
 526         mparse_buf_r(curp, blk, 1);
 527
 528         if (with_mmap)
 529                 munmap(blk.buf, blk.sz);
 530         else
 531                 free(blk.buf);
 532 }
 533
 534 static int
 535 read_whole_file(const char *file, int fd, struct buf *fb, int *with_mmap)
 536 {
 537         struct stat      st;
 538         size_t           off;
 539         ssize_t          ssz;
 540
 541         if (-1 == fstat(fd, &st)) {
 542                 perror(file);
 543                 return(0);
 544         }
 545
 546         /*
 547          * If we're a regular file, try just reading in the whole entry
 548          * via mmap().  This is faster than reading it into blocks, and
 549          * since each file is only a few bytes to begin with, I'm not
 550          * concerned that this is going to tank any machines.
 551          */
 552
 553         if (S_ISREG(st.st_mode)) {
 554                 if (st.st_size >= (1U << 31)) {
 555                         fprintf(stderr, "%s: input too large\n", file);
 556                         return(0);
 557                 }
 558                 *with_mmap = 1;
 559                 fb->sz = (size_t)st.st_size;
 560                 fb->buf = mmap(NULL, fb->sz, PROT_READ,
 561                                 MAP_FILE|MAP_SHARED, fd, 0);
 562                 if (fb->buf != MAP_FAILED)
 563                         return(1);
 564         }
 565
 566         /*
 567          * If this isn't a regular file (like, say, stdin), then we must
 568          * go the old way and just read things in bit by bit.
 569          */
 570
 571         *with_mmap = 0;
 572         off = 0;
 573         fb->sz = 0;
 574         fb->buf = NULL;
 575         for (;;) {
 576                 if (off == fb->sz) {
 577                         if (fb->sz == (1U << 31)) {
 578                                 fprintf(stderr, "%s: input too large\n", file);
 579                                 break;
 580                         }
 581                         resize_buf(fb, 65536);
 582                 }
 583                 ssz = read(fd, fb->buf + (int)off, fb->sz - off);
 584                 if (ssz == 0) {
 585                         fb->sz = off;
 586                         return(1);
 587                 }
 588                 if (ssz == -1) {
 589                         perror(file);
 590                         break;
 591                 }
 592                 off += (size_t)ssz;
 593         }
 594
 595         free(fb->buf);
 596         fb->buf = NULL;
 597         return(0);
 598 }
 599
 600 static void
 601 mparse_end(struct mparse *curp)
 602 {
 603
 604         if (MANDOCLEVEL_FATAL <= curp->file_status)
 605                 return;
 606
 607         if (curp->mdoc && ! mdoc_endparse(curp->mdoc)) {
 608                 assert(MANDOCLEVEL_FATAL <= curp->file_status);
 609                 return;
 610         }
 611
 612         if (curp->man && ! man_endparse(curp->man)) {
 613                 assert(MANDOCLEVEL_FATAL <= curp->file_status);
 614                 return;
 615         }
 616
 617         if ( ! (curp->man || curp->mdoc)) {
 618                 mandoc_msg(MANDOCERR_NOTMANUAL, curp, 1, 0, NULL);
 619                 curp->file_status = MANDOCLEVEL_FATAL;
 620                 return;
 621         }
 622
 623         roff_endparse(curp->roff);
 624 }
 625
 626 static void
 627 mparse_readfd_r(struct mparse *curp, int fd, const char *file, int re)
 628 {
 629         const char      *svfile;
 630
 631         if (-1 == fd)
 632                 if (-1 == (fd = open(file, O_RDONLY, 0))) {
 633                         perror(file);
 634                         curp->file_status = MANDOCLEVEL_SYSERR;
 635                         return;
 636                 }
 637
 638         svfile = curp->file;
 639         curp->file = file;
 640
 641         pdesc(curp, file, fd);
 642
 643         if (0 == re && MANDOCLEVEL_FATAL > curp->file_status)
 644                 mparse_end(curp);
 645
 646         if (STDIN_FILENO != fd && -1 == close(fd))
 647                 perror(file);
 648
 649         curp->file = svfile;
 650 }
 651
 652 enum mandoclevel
 653 mparse_readfd(struct mparse *curp, int fd, const char *file)
 654 {
 655
 656         mparse_readfd_r(curp, fd, file, 0);
 657         return(curp->file_status);
 658 }
 659
 660 struct mparse *
 661 mparse_alloc(enum mparset inttype, enum mandoclevel wlevel, mandocmsg mmsg, void *arg)
 662 {
 663         struct mparse   *curp;
 664
 665         curp = mandoc_calloc(1, sizeof(struct mparse));
 666
 667         curp->wlevel = wlevel;
 668         curp->mmsg = mmsg;
 669         curp->arg = arg;
 670         curp->inttype = inttype;
 671
 672         curp->roff = roff_alloc(&curp->regs, curp);
 673         return(curp);
 674 }
 675
 676 void
 677 mparse_reset(struct mparse *curp)
 678 {
 679
 680         memset(&curp->regs, 0, sizeof(struct regset));
 681
 682         roff_reset(curp->roff);
 683
 684         if (curp->mdoc)
 685                 mdoc_reset(curp->mdoc);
 686         if (curp->man)
 687                 man_reset(curp->man);
 688
 689         curp->file_status = MANDOCLEVEL_OK;
 690         curp->mdoc = NULL;
 691         curp->man = NULL;
 692 }
 693
 694 void
 695 mparse_free(struct mparse *curp)
 696 {
 697
 698         if (curp->pmdoc)
 699                 mdoc_free(curp->pmdoc);
 700         if (curp->pman)
 701                 man_free(curp->pman);
 702         if (curp->roff)
 703                 roff_free(curp->roff);
 704
 705         free(curp);
 706 }
 707
 708 void
 709 mparse_result(struct mparse *curp, struct mdoc **mdoc, struct man **man)
 710 {
 711
 712         *mdoc = curp->mdoc;
 713         *man = curp->man;
 714 }
 715
 716 void
 717 mandoc_vmsg(enum mandocerr t, struct mparse *m,
 718                 int ln, int pos, const char *fmt, ...)
 719 {
 720         char             buf[256];
 721         va_list          ap;
 722
 723         va_start(ap, fmt);
 724         vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
 725         va_end(ap);
 726
 727         mandoc_msg(t, m, ln, pos, buf);
 728 }
 729
 730 void
 731 mandoc_msg(enum mandocerr er, struct mparse *m,
 732                 int ln, int col, const char *msg)
 733 {
 734         enum mandoclevel level;
 735
 736         level = MANDOCLEVEL_FATAL;
 737         while (er < mandoclimits[level])
 738                 level--;
 739
 740         if (level < m->wlevel)
 741                 return;
 742
 743         (*m->mmsg)(er, level, m->file, ln, col, msg);
 744
 745         if (m->file_status < level)
 746                 m->file_status = level;
 747 }
 748
 749 const char *
 750 mparse_strerror(enum mandocerr er)
 751 {
 752
 753         return(mandocerrs[er]);
 754 }
 755
 756 const char *
 757 mparse_strlevel(enum mandoclevel lvl)
 758 {
 759         return(mandoclevels[lvl]);
 760 }