1 /* $Id: read.c,v 1.39 2013/09/16 00:25:07 schwarze Exp $ */
2 /*
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2010, 2011, 2012, 2013 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 #ifdef HAVE_MMAP
23 # include <sys/stat.h>
24 # include <sys/mman.h>
25 #endif
26
27 #include <assert.h>
28 #include <ctype.h>
29 #include <fcntl.h>
30 #include <stdarg.h>
31 #include <stdint.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <unistd.h>
36
37 #include "mandoc.h"
38 #include "libmandoc.h"
39 #include "mdoc.h"
40 #include "man.h"
41 #include "main.h"
42
43 #define REPARSE_LIMIT 1000
44
45 struct buf {
46 char *buf; /* binary input buffer */
47 size_t sz; /* size of binary buffer */
48 };
49
50 struct mparse {
51 enum mandoclevel file_status; /* status of current parse */
52 enum mandoclevel wlevel; /* ignore messages below this */
53 int line; /* line number in the file */
54 enum mparset inttype; /* which parser to use */
55 struct man *pman; /* persistent man parser */
56 struct mdoc *pmdoc; /* persistent mdoc parser */
57 struct man *man; /* man parser */
58 struct mdoc *mdoc; /* mdoc parser */
59 struct roff *roff; /* roff parser (!NULL) */
60 int reparse_count; /* finite interp. stack */
61 mandocmsg mmsg; /* warning/error message handler */
62 void *arg; /* argument to mmsg */
63 const char *file;
64 struct buf *secondary;
65 char *defos; /* default operating system */
66 };
67
68 static void resize_buf(struct buf *, size_t);
69 static void mparse_buf_r(struct mparse *, struct buf, int);
70 static void pset(const char *, int, struct mparse *);
71 static int read_whole_file(const char *, int, struct buf *, int *);
72 static void mparse_end(struct mparse *);
73 static void mparse_parse_buffer(struct mparse *, struct buf,
74 const char *);
75
76 static const enum mandocerr mandoclimits[MANDOCLEVEL_MAX] = {
77 MANDOCERR_OK,
78 MANDOCERR_WARNING,
79 MANDOCERR_WARNING,
80 MANDOCERR_ERROR,
81 MANDOCERR_FATAL,
82 MANDOCERR_MAX,
83 MANDOCERR_MAX
84 };
85
86 static const char * const mandocerrs[MANDOCERR_MAX] = {
87 "ok",
88
89 "generic warning",
90
91 /* related to the prologue */
92 "no title in document",
93 "document title should be all caps",
94 "unknown manual section",
95 "unknown manual volume or arch",
96 "date missing, using today's date",
97 "cannot parse date, using it verbatim",
98 "prologue macros out of order",
99 "duplicate prologue macro",
100 "macro not allowed in prologue",
101 "macro not allowed in body",
102
103 /* related to document structure */
104 ".so is fragile, better use ln(1)",
105 "NAME section must come first",
106 "bad NAME section contents",
107 "sections out of conventional order",
108 "duplicate section name",
109 "section header suited to sections 2, 3, and 9 only",
110
111 /* related to macros and nesting */
112 "skipping obsolete macro",
113 "skipping paragraph macro",
114 "moving paragraph macro out of list",
115 "skipping no-space macro",
116 "blocks badly nested",
117 "child violates parent syntax",
118 "nested displays are not portable",
119 "already in literal mode",
120 "line scope broken",
121
122 /* related to missing macro arguments */
123 "skipping empty macro",
124 "argument count wrong",
125 "missing display type",
126 "list type must come first",
127 "tag lists require a width argument",
128 "missing font type",
129 "skipping end of block that is not open",
130
131 /* related to bad macro arguments */
132 "skipping argument",
133 "duplicate argument",
134 "duplicate display type",
135 "duplicate list type",
136 "unknown AT&T UNIX version",
137 "bad Boolean value",
138 "unknown font",
139 "unknown standard specifier",
140 "bad width argument",
141
142 /* related to plain text */
143 "blank line in non-literal context",
144 "tab in non-literal context",
145 "end of line whitespace",
146 "bad comment style",
147 "bad escape sequence",
148 "unterminated quoted string",
149
150 /* related to equations */
151 "unexpected literal in equation",
152
153 "generic error",
154
155 /* related to equations */
156 "unexpected equation scope closure",
157 "equation scope open on exit",
158 "overlapping equation scopes",
159 "unexpected end of equation",
160 "equation syntax error",
161
162 /* related to tables */
163 "bad table syntax",
164 "bad table option",
165 "bad table layout",
166 "no table layout cells specified",
167 "no table data cells specified",
168 "ignore data in cell",
169 "data block still open",
170 "ignoring extra data cells",
171
172 "input stack limit exceeded, infinite loop?",
173 "skipping bad character",
174 "escaped character not allowed in a name",
175 "manual name not yet set",
176 "skipping text before the first section header",
177 "skipping unknown macro",
178 "NOT IMPLEMENTED, please use groff: skipping request",
179 "argument count wrong",
180 "skipping column outside column list",
181 "skipping end of block that is not open",
182 "missing end of block",
183 "scope open on exit",
184 "uname(3) system call failed",
185 "macro requires line argument(s)",
186 "macro requires body argument(s)",
187 "macro requires argument(s)",
188 "request requires a numeric argument",
189 "missing list type",
190 "line argument(s) will be lost",
191 "body argument(s) will be lost",
192
193 "generic fatal error",
194
195 "not a manual",
196 "column syntax is inconsistent",
197 "NOT IMPLEMENTED: .Bd -file",
198 "argument count wrong, violates syntax",
199 "child violates parent syntax",
200 "argument count wrong, violates syntax",
201 "NOT IMPLEMENTED: .so with absolute path or \"..\"",
202 "no document body",
203 "no document prologue",
204 "static buffer exhausted",
205 };
206
207 static const char * const mandoclevels[MANDOCLEVEL_MAX] = {
208 "SUCCESS",
209 "RESERVED",
210 "WARNING",
211 "ERROR",
212 "FATAL",
213 "BADARG",
214 "SYSERR"
215 };
216
217 static void
218 resize_buf(struct buf *buf, size_t initial)
219 {
220
221 buf->sz = buf->sz > initial/2 ? 2 * buf->sz : initial;
222 buf->buf = mandoc_realloc(buf->buf, buf->sz);
223 }
224
225 static void
226 pset(const char *buf, int pos, struct mparse *curp)
227 {
228 int i;
229
230 /*
231 * Try to intuit which kind of manual parser should be used. If
232 * passed in by command-line (-man, -mdoc), then use that
233 * explicitly. If passed as -mandoc, then try to guess from the
234 * line: either skip dot-lines, use -mdoc when finding `.Dt', or
235 * default to -man, which is more lenient.
236 *
237 * Separate out pmdoc/pman from mdoc/man: the first persists
238 * through all parsers, while the latter is used per-parse.
239 */
240
241 if ('.' == buf[0] || '\'' == buf[0]) {
242 for (i = 1; buf[i]; i++)
243 if (' ' != buf[i] && '\t' != buf[i])
244 break;
245 if ('\0' == buf[i])
246 return;
247 }
248
249 switch (curp->inttype) {
250 case (MPARSE_MDOC):
251 if (NULL == curp->pmdoc)
252 curp->pmdoc = mdoc_alloc(curp->roff, curp,
253 curp->defos);
254 assert(curp->pmdoc);
255 curp->mdoc = curp->pmdoc;
256 return;
257 case (MPARSE_MAN):
258 if (NULL == curp->pman)
259 curp->pman = man_alloc(curp->roff, curp);
260 assert(curp->pman);
261 curp->man = curp->pman;
262 return;
263 default:
264 break;
265 }
266
267 if (pos >= 3 && 0 == memcmp(buf, ".Dd", 3)) {
268 if (NULL == curp->pmdoc)
269 curp->pmdoc = mdoc_alloc(curp->roff, curp,
270 curp->defos);
271 assert(curp->pmdoc);
272 curp->mdoc = curp->pmdoc;
273 return;
274 }
275
276 if (NULL == curp->pman)
277 curp->pman = man_alloc(curp->roff, curp);
278 assert(curp->pman);
279 curp->man = curp->pman;
280 }
281
282 /*
283 * Main parse routine for an opened file. This is called for each
284 * opened file and simply loops around the full input file, possibly
285 * nesting (i.e., with `so').
286 */
287 static void
288 mparse_buf_r(struct mparse *curp, struct buf blk, int start)
289 {
290 const struct tbl_span *span;
291 struct buf ln;
292 enum rofferr rr;
293 int i, of, rc;
294 int pos; /* byte number in the ln buffer */
295 int lnn; /* line number in the real file */
296 unsigned char c;
297
298 memset(&ln, 0, sizeof(struct buf));
299
300 lnn = curp->line;
301 pos = 0;
302
303 for (i = 0; i < (int)blk.sz; ) {
304 if (0 == pos && '\0' == blk.buf[i])
305 break;
306
307 if (start) {
308 curp->line = lnn;
309 curp->reparse_count = 0;
310 }
311
312 while (i < (int)blk.sz && (start || '\0' != blk.buf[i])) {
313
314 /*
315 * When finding an unescaped newline character,
316 * leave the character loop to process the line.
317 * Skip a preceding carriage return, if any.
318 */
319
320 if ('\r' == blk.buf[i] && i + 1 < (int)blk.sz &&
321 '\n' == blk.buf[i + 1])
322 ++i;
323 if ('\n' == blk.buf[i]) {
324 ++i;
325 ++lnn;
326 break;
327 }
328
329 /*
330 * Make sure we have space for at least
331 * one backslash and one other character
332 * and the trailing NUL byte.
333 */
334
335 if (pos + 2 >= (int)ln.sz)
336 resize_buf(&ln, 256);
337
338 /*
339 * Warn about bogus characters. If you're using
340 * non-ASCII encoding, you're screwing your
341 * readers. Since I'd rather this not happen,
342 * I'll be helpful and replace these characters
343 * with "?", so we don't display gibberish.
344 * Note to manual writers: use special characters.
345 */
346
347 c = (unsigned char) blk.buf[i];
348
349 if ( ! (isascii(c) &&
350 (isgraph(c) || isblank(c)))) {
351 mandoc_msg(MANDOCERR_BADCHAR, curp,
352 curp->line, pos, NULL);
353 i++;
354 ln.buf[pos++] = '?';
355 continue;
356 }
357
358 /* Trailing backslash = a plain char. */
359
360 if ('\\' != blk.buf[i] || i + 1 == (int)blk.sz) {
361 ln.buf[pos++] = blk.buf[i++];
362 continue;
363 }
364
365 /*
366 * Found escape and at least one other character.
367 * When it's a newline character, skip it.
368 * When there is a carriage return in between,
369 * skip that one as well.
370 */
371
372 if ('\r' == blk.buf[i + 1] && i + 2 < (int)blk.sz &&
373 '\n' == blk.buf[i + 2])
374 ++i;
375 if ('\n' == blk.buf[i + 1]) {
376 i += 2;
377 ++lnn;
378 continue;
379 }
380
381 if ('"' == blk.buf[i + 1] || '#' == blk.buf[i + 1]) {
382 i += 2;
383 /* Comment, skip to end of line */
384 for (; i < (int)blk.sz; ++i) {
385 if ('\n' == blk.buf[i]) {
386 ++i;
387 ++lnn;
388 break;
389 }
390 }
391
392 /* Backout trailing whitespaces */
393 for (; pos > 0; --pos) {
394 if (ln.buf[pos - 1] != ' ')
395 break;
396 if (pos > 2 && ln.buf[pos - 2] == '\\')
397 break;
398 }
399 break;
400 }
401
402 /* Catch escaped bogus characters. */
403
404 c = (unsigned char) blk.buf[i+1];
405
406 if ( ! (isascii(c) &&
407 (isgraph(c) || isblank(c)))) {
408 mandoc_msg(MANDOCERR_BADCHAR, curp,
409 curp->line, pos, NULL);
410 i += 2;
411 ln.buf[pos++] = '?';
412 continue;
413 }
414
415 /* Some other escape sequence, copy & cont. */
416
417 ln.buf[pos++] = blk.buf[i++];
418 ln.buf[pos++] = blk.buf[i++];
419 }
420
421 if (pos >= (int)ln.sz)
422 resize_buf(&ln, 256);
423
424 ln.buf[pos] = '\0';
425
426 /*
427 * A significant amount of complexity is contained by
428 * the roff preprocessor. It's line-oriented but can be
429 * expressed on one line, so we need at times to
430 * readjust our starting point and re-run it. The roff
431 * preprocessor can also readjust the buffers with new
432 * data, so we pass them in wholesale.
433 */
434
435 of = 0;
436
437 /*
438 * Maintain a lookaside buffer of all parsed lines. We
439 * only do this if mparse_keep() has been invoked (the
440 * buffer may be accessed with mparse_getkeep()).
441 */
442
443 if (curp->secondary) {
444 curp->secondary->buf =
445 mandoc_realloc
446 (curp->secondary->buf,
447 curp->secondary->sz + pos + 2);
448 memcpy(curp->secondary->buf +
449 curp->secondary->sz,
450 ln.buf, pos);
451 curp->secondary->sz += pos;
452 curp->secondary->buf
453 [curp->secondary->sz] = '\n';
454 curp->secondary->sz++;
455 curp->secondary->buf
456 [curp->secondary->sz] = '\0';
457 }
458 rerun:
459 rr = roff_parseln
460 (curp->roff, curp->line,
461 &ln.buf, &ln.sz, of, &of);
462
463 switch (rr) {
464 case (ROFF_REPARSE):
465 if (REPARSE_LIMIT >= ++curp->reparse_count)
466 mparse_buf_r(curp, ln, 0);
467 else
468 mandoc_msg(MANDOCERR_ROFFLOOP, curp,
469 curp->line, pos, NULL);
470 pos = 0;
471 continue;
472 case (ROFF_APPEND):
473 pos = (int)strlen(ln.buf);
474 continue;
475 case (ROFF_RERUN):
476 goto rerun;
477 case (ROFF_IGN):
478 pos = 0;
479 continue;
480 case (ROFF_ERR):
481 assert(MANDOCLEVEL_FATAL <= curp->file_status);
482 break;
483 case (ROFF_SO):
484 /*
485 * We remove `so' clauses from our lookaside
486 * buffer because we're going to descend into
487 * the file recursively.
488 */
489 if (curp->secondary)
490 curp->secondary->sz -= pos + 1;
491 mparse_readfd(curp, -1, ln.buf + of);
492 if (MANDOCLEVEL_FATAL <= curp->file_status)
493 break;
494 pos = 0;
495 continue;
496 default:
497 break;
498 }
499
500 /*
501 * If we encounter errors in the recursive parse, make
502 * sure we don't continue parsing.
503 */
504
505 if (MANDOCLEVEL_FATAL <= curp->file_status)
506 break;
507
508 /*
509 * If input parsers have not been allocated, do so now.
510 * We keep these instanced between parsers, but set them
511 * locally per parse routine since we can use different
512 * parsers with each one.
513 */
514
515 if ( ! (curp->man || curp->mdoc))
516 pset(ln.buf + of, pos - of, curp);
517
518 /*
519 * Lastly, push down into the parsers themselves. One
520 * of these will have already been set in the pset()
521 * routine.
522 * If libroff returns ROFF_TBL, then add it to the
523 * currently open parse. Since we only get here if
524 * there does exist data (see tbl_data.c), we're
525 * guaranteed that something's been allocated.
526 * Do the same for ROFF_EQN.
527 */
528
529 rc = -1;
530
531 if (ROFF_TBL == rr)
532 while (NULL != (span = roff_span(curp->roff))) {
533 rc = curp->man ?
534 man_addspan(curp->man, span) :
535 mdoc_addspan(curp->mdoc, span);
536 if (0 == rc)
537 break;
538 }
539 else if (ROFF_EQN == rr)
540 rc = curp->mdoc ?
541 mdoc_addeqn(curp->mdoc,
542 roff_eqn(curp->roff)) :
543 man_addeqn(curp->man,
544 roff_eqn(curp->roff));
545 else if (curp->man || curp->mdoc)
546 rc = curp->man ?
547 man_parseln(curp->man,
548 curp->line, ln.buf, of) :
549 mdoc_parseln(curp->mdoc,
550 curp->line, ln.buf, of);
551
552 if (0 == rc) {
553 assert(MANDOCLEVEL_FATAL <= curp->file_status);
554 break;
555 }
556
557 /* Temporary buffers typically are not full. */
558
559 if (0 == start && '\0' == blk.buf[i])
560 break;
561
562 /* Start the next input line. */
563
564 pos = 0;
565 }
566
567 free(ln.buf);
568 }
569
570 static int
571 read_whole_file(const char *file, int fd, struct buf *fb, int *with_mmap)
572 {
573 size_t off;
574 ssize_t ssz;
575
576 #ifdef HAVE_MMAP
577 struct stat st;
578 if (-1 == fstat(fd, &st)) {
579 perror(file);
580 return(0);
581 }
582
583 /*
584 * If we're a regular file, try just reading in the whole entry
585 * via mmap(). This is faster than reading it into blocks, and
586 * since each file is only a few bytes to begin with, I'm not
587 * concerned that this is going to tank any machines.
588 */
589
590 if (S_ISREG(st.st_mode)) {
591 if (st.st_size >= (1U << 31)) {
592 fprintf(stderr, "%s: input too large\n", file);
593 return(0);
594 }
595 *with_mmap = 1;
596 fb->sz = (size_t)st.st_size;
597 fb->buf = mmap(NULL, fb->sz, PROT_READ, MAP_SHARED, fd, 0);
598 if (fb->buf != MAP_FAILED)
599 return(1);
600 }
601 #endif
602
603 /*
604 * If this isn't a regular file (like, say, stdin), then we must
605 * go the old way and just read things in bit by bit.
606 */
607
608 *with_mmap = 0;
609 off = 0;
610 fb->sz = 0;
611 fb->buf = NULL;
612 for (;;) {
613 if (off == fb->sz) {
614 if (fb->sz == (1U << 31)) {
615 fprintf(stderr, "%s: input too large\n", file);
616 break;
617 }
618 resize_buf(fb, 65536);
619 }
620 ssz = read(fd, fb->buf + (int)off, fb->sz - off);
621 if (ssz == 0) {
622 fb->sz = off;
623 return(1);
624 }
625 if (ssz == -1) {
626 perror(file);
627 break;
628 }
629 off += (size_t)ssz;
630 }
631
632 free(fb->buf);
633 fb->buf = NULL;
634 return(0);
635 }
636
637 static void
638 mparse_end(struct mparse *curp)
639 {
640
641 if (MANDOCLEVEL_FATAL <= curp->file_status)
642 return;
643
644 if (curp->mdoc && ! mdoc_endparse(curp->mdoc)) {
645 assert(MANDOCLEVEL_FATAL <= curp->file_status);
646 return;
647 }
648
649 if (curp->man && ! man_endparse(curp->man)) {
650 assert(MANDOCLEVEL_FATAL <= curp->file_status);
651 return;
652 }
653
654 if ( ! (curp->man || curp->mdoc)) {
655 mandoc_msg(MANDOCERR_NOTMANUAL, curp, 1, 0, NULL);
656 curp->file_status = MANDOCLEVEL_FATAL;
657 return;
658 }
659
660 roff_endparse(curp->roff);
661 }
662
663 static void
664 mparse_parse_buffer(struct mparse *curp, struct buf blk, const char *file)
665 {
666 const char *svfile;
667 static int recursion_depth;
668
669 if (64 < recursion_depth) {
670 mandoc_msg(MANDOCERR_ROFFLOOP, curp, curp->line, 0, NULL);
671 return;
672 }
673
674 /* Line number is per-file. */
675 svfile = curp->file;
676 curp->file = file;
677 curp->line = 1;
678 recursion_depth++;
679
680 mparse_buf_r(curp, blk, 1);
681
682 if (0 == --recursion_depth && MANDOCLEVEL_FATAL > curp->file_status)
683 mparse_end(curp);
684
685 curp->file = svfile;
686 }
687
688 enum mandoclevel
689 mparse_readmem(struct mparse *curp, const void *buf, size_t len,
690 const char *file)
691 {
692 struct buf blk;
693
694 blk.buf = UNCONST(buf);
695 blk.sz = len;
696
697 mparse_parse_buffer(curp, blk, file);
698 return(curp->file_status);
699 }
700
701 enum mandoclevel
702 mparse_readfd(struct mparse *curp, int fd, const char *file)
703 {
704 struct buf blk;
705 int with_mmap;
706
707 if (-1 == fd)
708 if (-1 == (fd = open(file, O_RDONLY, 0))) {
709 perror(file);
710 curp->file_status = MANDOCLEVEL_SYSERR;
711 goto out;
712 }
713 /*
714 * Run for each opened file; may be called more than once for
715 * each full parse sequence if the opened file is nested (i.e.,
716 * from `so'). Simply sucks in the whole file and moves into
717 * the parse phase for the file.
718 */
719
720 if ( ! read_whole_file(file, fd, &blk, &with_mmap)) {
721 curp->file_status = MANDOCLEVEL_SYSERR;
722 goto out;
723 }
724
725 mparse_parse_buffer(curp, blk, file);
726
727 #ifdef HAVE_MMAP
728 if (with_mmap)
729 munmap(blk.buf, blk.sz);
730 else
731 #endif
732 free(blk.buf);
733
734 if (STDIN_FILENO != fd && -1 == close(fd))
735 perror(file);
736 out:
737 return(curp->file_status);
738 }
739
740 struct mparse *
741 mparse_alloc(enum mparset inttype, enum mandoclevel wlevel,
742 mandocmsg mmsg, void *arg, char *defos)
743 {
744 struct mparse *curp;
745
746 assert(wlevel <= MANDOCLEVEL_FATAL);
747
748 curp = mandoc_calloc(1, sizeof(struct mparse));
749
750 curp->wlevel = wlevel;
751 curp->mmsg = mmsg;
752 curp->arg = arg;
753 curp->inttype = inttype;
754 curp->defos = defos;
755
756 curp->roff = roff_alloc(inttype, curp);
757 return(curp);
758 }
759
760 void
761 mparse_reset(struct mparse *curp)
762 {
763
764 roff_reset(curp->roff);
765
766 if (curp->mdoc)
767 mdoc_reset(curp->mdoc);
768 if (curp->man)
769 man_reset(curp->man);
770 if (curp->secondary)
771 curp->secondary->sz = 0;
772
773 curp->file_status = MANDOCLEVEL_OK;
774 curp->mdoc = NULL;
775 curp->man = NULL;
776 }
777
778 void
779 mparse_free(struct mparse *curp)
780 {
781
782 if (curp->pmdoc)
783 mdoc_free(curp->pmdoc);
784 if (curp->pman)
785 man_free(curp->pman);
786 if (curp->roff)
787 roff_free(curp->roff);
788 if (curp->secondary)
789 free(curp->secondary->buf);
790
791 free(curp->secondary);
792 free(curp);
793 }
794
795 void
796 mparse_result(struct mparse *curp, struct mdoc **mdoc, struct man **man)
797 {
798
799 if (mdoc)
800 *mdoc = curp->mdoc;
801 if (man)
802 *man = curp->man;
803 }
804
805 void
806 mandoc_vmsg(enum mandocerr t, struct mparse *m,
807 int ln, int pos, const char *fmt, ...)
808 {
809 char buf[256];
810 va_list ap;
811
812 va_start(ap, fmt);
813 vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
814 va_end(ap);
815
816 mandoc_msg(t, m, ln, pos, buf);
817 }
818
819 void
820 mandoc_msg(enum mandocerr er, struct mparse *m,
821 int ln, int col, const char *msg)
822 {
823 enum mandoclevel level;
824
825 level = MANDOCLEVEL_FATAL;
826 while (er < mandoclimits[level])
827 level--;
828
829 if (level < m->wlevel)
830 return;
831
832 if (m->mmsg)
833 (*m->mmsg)(er, level, m->file, ln, col, msg);
834
835 if (m->file_status < level)
836 m->file_status = level;
837 }
838
839 const char *
840 mparse_strerror(enum mandocerr er)
841 {
842
843 return(mandocerrs[er]);
844 }
845
846 const char *
847 mparse_strlevel(enum mandoclevel lvl)
848 {
849 return(mandoclevels[lvl]);
850 }
851
852 void
853 mparse_keep(struct mparse *p)
854 {
855
856 assert(NULL == p->secondary);
857 p->secondary = mandoc_calloc(1, sizeof(struct buf));
858 }
859
860 const char *
861 mparse_getkeep(const struct mparse *p)
862 {
863
864 assert(p->secondary);
865 return(p->secondary->sz ? p->secondary->buf : NULL);
866 }