1 /* $Id: mdoc.c,v 1.206 2013/12/24 19:11:46 schwarze Exp $ */
2 /*
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2010, 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 #include <sys/types.h>
23
24 #include <assert.h>
25 #include <stdarg.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <time.h>
30
31 #include "mdoc.h"
32 #include "mandoc.h"
33 #include "libmdoc.h"
34 #include "libmandoc.h"
35
36 const char *const __mdoc_macronames[MDOC_MAX] = {
37 "Ap", "Dd", "Dt", "Os",
38 "Sh", "Ss", "Pp", "D1",
39 "Dl", "Bd", "Ed", "Bl",
40 "El", "It", "Ad", "An",
41 "Ar", "Cd", "Cm", "Dv",
42 "Er", "Ev", "Ex", "Fa",
43 "Fd", "Fl", "Fn", "Ft",
44 "Ic", "In", "Li", "Nd",
45 "Nm", "Op", "Ot", "Pa",
46 "Rv", "St", "Va", "Vt",
47 /* LINTED */
48 "Xr", "%A", "%B", "%D",
49 /* LINTED */
50 "%I", "%J", "%N", "%O",
51 /* LINTED */
52 "%P", "%R", "%T", "%V",
53 "Ac", "Ao", "Aq", "At",
54 "Bc", "Bf", "Bo", "Bq",
55 "Bsx", "Bx", "Db", "Dc",
56 "Do", "Dq", "Ec", "Ef",
57 "Em", "Eo", "Fx", "Ms",
58 "No", "Ns", "Nx", "Ox",
59 "Pc", "Pf", "Po", "Pq",
60 "Qc", "Ql", "Qo", "Qq",
61 "Re", "Rs", "Sc", "So",
62 "Sq", "Sm", "Sx", "Sy",
63 "Tn", "Ux", "Xc", "Xo",
64 "Fo", "Fc", "Oo", "Oc",
65 "Bk", "Ek", "Bt", "Hf",
66 "Fr", "Ud", "Lb", "Lp",
67 "Lk", "Mt", "Brq", "Bro",
68 /* LINTED */
69 "Brc", "%C", "Es", "En",
70 /* LINTED */
71 "Dx", "%Q", "br", "sp",
72 /* LINTED */
73 "%U", "Ta"
74 };
75
76 const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
77 "split", "nosplit", "ragged",
78 "unfilled", "literal", "file",
79 "offset", "bullet", "dash",
80 "hyphen", "item", "enum",
81 "tag", "diag", "hang",
82 "ohang", "inset", "column",
83 "width", "compact", "std",
84 "filled", "words", "emphasis",
85 "symbolic", "nested", "centered"
86 };
87
88 const char * const *mdoc_macronames = __mdoc_macronames;
89 const char * const *mdoc_argnames = __mdoc_argnames;
90
91 static void mdoc_node_free(struct mdoc_node *);
92 static void mdoc_node_unlink(struct mdoc *,
93 struct mdoc_node *);
94 static void mdoc_free1(struct mdoc *);
95 static void mdoc_alloc1(struct mdoc *);
96 static struct mdoc_node *node_alloc(struct mdoc *, int, int,
97 enum mdoct, enum mdoc_type);
98 static int node_append(struct mdoc *,
99 struct mdoc_node *);
100 #if 0
101 static int mdoc_preptext(struct mdoc *, int, char *, int);
102 #endif
103 static int mdoc_ptext(struct mdoc *, int, char *, int);
104 static int mdoc_pmacro(struct mdoc *, int, char *, int);
105
106 const struct mdoc_node *
107 mdoc_node(const struct mdoc *mdoc)
108 {
109
110 assert( ! (MDOC_HALT & mdoc->flags));
111 return(mdoc->first);
112 }
113
114
115 const struct mdoc_meta *
116 mdoc_meta(const struct mdoc *mdoc)
117 {
118
119 assert( ! (MDOC_HALT & mdoc->flags));
120 return(&mdoc->meta);
121 }
122
123
124 /*
125 * Frees volatile resources (parse tree, meta-data, fields).
126 */
127 static void
128 mdoc_free1(struct mdoc *mdoc)
129 {
130
131 if (mdoc->first)
132 mdoc_node_delete(mdoc, mdoc->first);
133 if (mdoc->meta.title)
134 free(mdoc->meta.title);
135 if (mdoc->meta.os)
136 free(mdoc->meta.os);
137 if (mdoc->meta.name)
138 free(mdoc->meta.name);
139 if (mdoc->meta.arch)
140 free(mdoc->meta.arch);
141 if (mdoc->meta.vol)
142 free(mdoc->meta.vol);
143 if (mdoc->meta.msec)
144 free(mdoc->meta.msec);
145 if (mdoc->meta.date)
146 free(mdoc->meta.date);
147 }
148
149
150 /*
151 * Allocate all volatile resources (parse tree, meta-data, fields).
152 */
153 static void
154 mdoc_alloc1(struct mdoc *mdoc)
155 {
156
157 memset(&mdoc->meta, 0, sizeof(struct mdoc_meta));
158 mdoc->flags = 0;
159 mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
160 mdoc->last = mandoc_calloc(1, sizeof(struct mdoc_node));
161 mdoc->first = mdoc->last;
162 mdoc->last->type = MDOC_ROOT;
163 mdoc->last->tok = MDOC_MAX;
164 mdoc->next = MDOC_NEXT_CHILD;
165 }
166
167
168 /*
169 * Free up volatile resources (see mdoc_free1()) then re-initialises the
170 * data with mdoc_alloc1(). After invocation, parse data has been reset
171 * and the parser is ready for re-invocation on a new tree; however,
172 * cross-parse non-volatile data is kept intact.
173 */
174 void
175 mdoc_reset(struct mdoc *mdoc)
176 {
177
178 mdoc_free1(mdoc);
179 mdoc_alloc1(mdoc);
180 }
181
182
183 /*
184 * Completely free up all volatile and non-volatile parse resources.
185 * After invocation, the pointer is no longer usable.
186 */
187 void
188 mdoc_free(struct mdoc *mdoc)
189 {
190
191 mdoc_free1(mdoc);
192 free(mdoc);
193 }
194
195
196 /*
197 * Allocate volatile and non-volatile parse resources.
198 */
199 struct mdoc *
200 mdoc_alloc(struct roff *roff, struct mparse *parse, char *defos)
201 {
202 struct mdoc *p;
203
204 p = mandoc_calloc(1, sizeof(struct mdoc));
205
206 p->parse = parse;
207 p->defos = defos;
208 p->roff = roff;
209
210 mdoc_hash_init();
211 mdoc_alloc1(p);
212 return(p);
213 }
214
215
216 /*
217 * Climb back up the parse tree, validating open scopes. Mostly calls
218 * through to macro_end() in macro.c.
219 */
220 int
221 mdoc_endparse(struct mdoc *mdoc)
222 {
223
224 assert( ! (MDOC_HALT & mdoc->flags));
225 if (mdoc_macroend(mdoc))
226 return(1);
227 mdoc->flags |= MDOC_HALT;
228 return(0);
229 }
230
231 int
232 mdoc_addeqn(struct mdoc *mdoc, const struct eqn *ep)
233 {
234 struct mdoc_node *n;
235
236 assert( ! (MDOC_HALT & mdoc->flags));
237
238 /* No text before an initial macro. */
239
240 if (SEC_NONE == mdoc->lastnamed) {
241 mdoc_pmsg(mdoc, ep->ln, ep->pos, MANDOCERR_NOTEXT);
242 return(1);
243 }
244
245 n = node_alloc(mdoc, ep->ln, ep->pos, MDOC_MAX, MDOC_EQN);
246 n->eqn = ep;
247
248 if ( ! node_append(mdoc, n))
249 return(0);
250
251 mdoc->next = MDOC_NEXT_SIBLING;
252 return(1);
253 }
254
255 int
256 mdoc_addspan(struct mdoc *mdoc, const struct tbl_span *sp)
257 {
258 struct mdoc_node *n;
259
260 assert( ! (MDOC_HALT & mdoc->flags));
261
262 /* No text before an initial macro. */
263
264 if (SEC_NONE == mdoc->lastnamed) {
265 mdoc_pmsg(mdoc, sp->line, 0, MANDOCERR_NOTEXT);
266 return(1);
267 }
268
269 n = node_alloc(mdoc, sp->line, 0, MDOC_MAX, MDOC_TBL);
270 n->span = sp;
271
272 if ( ! node_append(mdoc, n))
273 return(0);
274
275 mdoc->next = MDOC_NEXT_SIBLING;
276 return(1);
277 }
278
279
280 /*
281 * Main parse routine. Parses a single line -- really just hands off to
282 * the macro (mdoc_pmacro()) or text parser (mdoc_ptext()).
283 */
284 int
285 mdoc_parseln(struct mdoc *mdoc, int ln, char *buf, int offs)
286 {
287
288 assert( ! (MDOC_HALT & mdoc->flags));
289
290 mdoc->flags |= MDOC_NEWLINE;
291
292 /*
293 * Let the roff nS register switch SYNOPSIS mode early,
294 * such that the parser knows at all times
295 * whether this mode is on or off.
296 * Note that this mode is also switched by the Sh macro.
297 */
298 if (roff_getreg(mdoc->roff, "nS"))
299 mdoc->flags |= MDOC_SYNOPSIS;
300 else
301 mdoc->flags &= ~MDOC_SYNOPSIS;
302
303 return(roff_getcontrol(mdoc->roff, buf, &offs) ?
304 mdoc_pmacro(mdoc, ln, buf, offs) :
305 mdoc_ptext(mdoc, ln, buf, offs));
306 }
307
308 int
309 mdoc_macro(MACRO_PROT_ARGS)
310 {
311 assert(tok < MDOC_MAX);
312
313 /* If we're in the body, deny prologue calls. */
314
315 if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
316 MDOC_PBODY & mdoc->flags) {
317 mdoc_pmsg(mdoc, line, ppos, MANDOCERR_BADBODY);
318 return(1);
319 }
320
321 /* If we're in the prologue, deny "body" macros. */
322
323 if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
324 ! (MDOC_PBODY & mdoc->flags)) {
325 mdoc_pmsg(mdoc, line, ppos, MANDOCERR_BADPROLOG);
326 if (NULL == mdoc->meta.msec)
327 mdoc->meta.msec = mandoc_strdup("1");
328 if (NULL == mdoc->meta.title)
329 mdoc->meta.title = mandoc_strdup("UNKNOWN");
330 if (NULL == mdoc->meta.vol)
331 mdoc->meta.vol = mandoc_strdup("LOCAL");
332 if (NULL == mdoc->meta.os)
333 mdoc->meta.os = mandoc_strdup("LOCAL");
334 if (NULL == mdoc->meta.date)
335 mdoc->meta.date = mandoc_normdate
336 (mdoc->parse, NULL, line, ppos);
337 mdoc->flags |= MDOC_PBODY;
338 }
339
340 return((*mdoc_macros[tok].fp)(mdoc, tok, line, ppos, pos, buf));
341 }
342
343
344 static int
345 node_append(struct mdoc *mdoc, struct mdoc_node *p)
346 {
347
348 assert(mdoc->last);
349 assert(mdoc->first);
350 assert(MDOC_ROOT != p->type);
351
352 switch (mdoc->next) {
353 case (MDOC_NEXT_SIBLING):
354 mdoc->last->next = p;
355 p->prev = mdoc->last;
356 p->parent = mdoc->last->parent;
357 break;
358 case (MDOC_NEXT_CHILD):
359 mdoc->last->child = p;
360 p->parent = mdoc->last;
361 break;
362 default:
363 abort();
364 /* NOTREACHED */
365 }
366
367 p->parent->nchild++;
368
369 /*
370 * Copy over the normalised-data pointer of our parent. Not
371 * everybody has one, but copying a null pointer is fine.
372 */
373
374 switch (p->type) {
375 case (MDOC_BODY):
376 if (ENDBODY_NOT != p->end)
377 break;
378 /* FALLTHROUGH */
379 case (MDOC_TAIL):
380 /* FALLTHROUGH */
381 case (MDOC_HEAD):
382 p->norm = p->parent->norm;
383 break;
384 default:
385 break;
386 }
387
388 if ( ! mdoc_valid_pre(mdoc, p))
389 return(0);
390
391 switch (p->type) {
392 case (MDOC_HEAD):
393 assert(MDOC_BLOCK == p->parent->type);
394 p->parent->head = p;
395 break;
396 case (MDOC_TAIL):
397 assert(MDOC_BLOCK == p->parent->type);
398 p->parent->tail = p;
399 break;
400 case (MDOC_BODY):
401 if (p->end)
402 break;
403 assert(MDOC_BLOCK == p->parent->type);
404 p->parent->body = p;
405 break;
406 default:
407 break;
408 }
409
410 mdoc->last = p;
411
412 switch (p->type) {
413 case (MDOC_TBL):
414 /* FALLTHROUGH */
415 case (MDOC_TEXT):
416 if ( ! mdoc_valid_post(mdoc))
417 return(0);
418 break;
419 default:
420 break;
421 }
422
423 return(1);
424 }
425
426
427 static struct mdoc_node *
428 node_alloc(struct mdoc *mdoc, int line, int pos,
429 enum mdoct tok, enum mdoc_type type)
430 {
431 struct mdoc_node *p;
432
433 p = mandoc_calloc(1, sizeof(struct mdoc_node));
434 p->sec = mdoc->lastsec;
435 p->line = line;
436 p->pos = pos;
437 p->lastline = line;
438 p->tok = tok;
439 p->type = type;
440
441 /* Flag analysis. */
442
443 if (MDOC_SYNOPSIS & mdoc->flags)
444 p->flags |= MDOC_SYNPRETTY;
445 else
446 p->flags &= ~MDOC_SYNPRETTY;
447 if (MDOC_NEWLINE & mdoc->flags)
448 p->flags |= MDOC_LINE;
449 mdoc->flags &= ~MDOC_NEWLINE;
450
451 return(p);
452 }
453
454
455 int
456 mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, enum mdoct tok)
457 {
458 struct mdoc_node *p;
459
460 p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
461 if ( ! node_append(mdoc, p))
462 return(0);
463 mdoc->next = MDOC_NEXT_CHILD;
464 return(1);
465 }
466
467
468 int
469 mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, enum mdoct tok)
470 {
471 struct mdoc_node *p;
472
473 assert(mdoc->first);
474 assert(mdoc->last);
475
476 p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
477 if ( ! node_append(mdoc, p))
478 return(0);
479 mdoc->next = MDOC_NEXT_CHILD;
480 return(1);
481 }
482
483
484 int
485 mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, enum mdoct tok)
486 {
487 struct mdoc_node *p;
488
489 p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
490 if ( ! node_append(mdoc, p))
491 return(0);
492 mdoc->next = MDOC_NEXT_CHILD;
493 return(1);
494 }
495
496
497 int
498 mdoc_endbody_alloc(struct mdoc *mdoc, int line, int pos, enum mdoct tok,
499 struct mdoc_node *body, enum mdoc_endbody end)
500 {
501 struct mdoc_node *p;
502
503 p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
504 p->pending = body;
505 p->norm = body->norm;
506 p->end = end;
507 if ( ! node_append(mdoc, p))
508 return(0);
509 mdoc->next = MDOC_NEXT_SIBLING;
510 return(1);
511 }
512
513
514 int
515 mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
516 enum mdoct tok, struct mdoc_arg *args)
517 {
518 struct mdoc_node *p;
519
520 p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
521 p->args = args;
522 if (p->args)
523 (args->refcnt)++;
524
525 switch (tok) {
526 case (MDOC_Bd):
527 /* FALLTHROUGH */
528 case (MDOC_Bf):
529 /* FALLTHROUGH */
530 case (MDOC_Bl):
531 /* FALLTHROUGH */
532 case (MDOC_Rs):
533 p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
534 break;
535 default:
536 break;
537 }
538
539 if ( ! node_append(mdoc, p))
540 return(0);
541 mdoc->next = MDOC_NEXT_CHILD;
542 return(1);
543 }
544
545
546 int
547 mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
548 enum mdoct tok, struct mdoc_arg *args)
549 {
550 struct mdoc_node *p;
551
552 p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
553 p->args = args;
554 if (p->args)
555 (args->refcnt)++;
556
557 switch (tok) {
558 case (MDOC_An):
559 p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
560 break;
561 default:
562 break;
563 }
564
565 if ( ! node_append(mdoc, p))
566 return(0);
567 mdoc->next = MDOC_NEXT_CHILD;
568 return(1);
569 }
570
571 int
572 mdoc_word_alloc(struct mdoc *mdoc, int line, int pos, const char *p)
573 {
574 struct mdoc_node *n;
575
576 n = node_alloc(mdoc, line, pos, MDOC_MAX, MDOC_TEXT);
577 n->string = roff_strdup(mdoc->roff, p);
578
579 if ( ! node_append(mdoc, n))
580 return(0);
581
582 mdoc->next = MDOC_NEXT_SIBLING;
583 return(1);
584 }
585
586 void
587 mdoc_word_append(struct mdoc *mdoc, const char *p)
588 {
589 struct mdoc_node *n;
590 char *addstr, *newstr;
591
592 n = mdoc->last;
593 addstr = roff_strdup(mdoc->roff, p);
594 if (-1 == asprintf(&newstr, "%s %s", n->string, addstr)) {
595 perror(NULL);
596 exit((int)MANDOCLEVEL_SYSERR);
597 }
598 free(addstr);
599 free(n->string);
600 n->string = newstr;
601 mdoc->next = MDOC_NEXT_SIBLING;
602 }
603
604 static void
605 mdoc_node_free(struct mdoc_node *p)
606 {
607
608 if (MDOC_BLOCK == p->type || MDOC_ELEM == p->type)
609 free(p->norm);
610 if (p->string)
611 free(p->string);
612 if (p->args)
613 mdoc_argv_free(p->args);
614 free(p);
615 }
616
617
618 static void
619 mdoc_node_unlink(struct mdoc *mdoc, struct mdoc_node *n)
620 {
621
622 /* Adjust siblings. */
623
624 if (n->prev)
625 n->prev->next = n->next;
626 if (n->next)
627 n->next->prev = n->prev;
628
629 /* Adjust parent. */
630
631 if (n->parent) {
632 n->parent->nchild--;
633 if (n->parent->child == n)
634 n->parent->child = n->prev ? n->prev : n->next;
635 if (n->parent->last == n)
636 n->parent->last = n->prev ? n->prev : NULL;
637 }
638
639 /* Adjust parse point, if applicable. */
640
641 if (mdoc && mdoc->last == n) {
642 if (n->prev) {
643 mdoc->last = n->prev;
644 mdoc->next = MDOC_NEXT_SIBLING;
645 } else {
646 mdoc->last = n->parent;
647 mdoc->next = MDOC_NEXT_CHILD;
648 }
649 }
650
651 if (mdoc && mdoc->first == n)
652 mdoc->first = NULL;
653 }
654
655
656 void
657 mdoc_node_delete(struct mdoc *mdoc, struct mdoc_node *p)
658 {
659
660 while (p->child) {
661 assert(p->nchild);
662 mdoc_node_delete(mdoc, p->child);
663 }
664 assert(0 == p->nchild);
665
666 mdoc_node_unlink(mdoc, p);
667 mdoc_node_free(p);
668 }
669
670 int
671 mdoc_node_relink(struct mdoc *mdoc, struct mdoc_node *p)
672 {
673
674 mdoc_node_unlink(mdoc, p);
675 return(node_append(mdoc, p));
676 }
677
678 #if 0
679 /*
680 * Pre-treat a text line.
681 * Text lines can consist of equations, which must be handled apart from
682 * the regular text.
683 * Thus, use this function to step through a line checking if it has any
684 * equations embedded in it.
685 * This must handle multiple equations AND equations that do not end at
686 * the end-of-line, i.e., will re-enter in the next roff parse.
687 */
688 static int
689 mdoc_preptext(struct mdoc *mdoc, int line, char *buf, int offs)
690 {
691 char *start, *end;
692 char delim;
693
694 while ('\0' != buf[offs]) {
695 /* Mark starting position if eqn is set. */
696 start = NULL;
697 if ('\0' != (delim = roff_eqndelim(mdoc->roff)))
698 if (NULL != (start = strchr(buf + offs, delim)))
699 *start++ = '\0';
700
701 /* Parse text as normal. */
702 if ( ! mdoc_ptext(mdoc, line, buf, offs))
703 return(0);
704
705 /* Continue only if an equation exists. */
706 if (NULL == start)
707 break;
708
709 /* Read past the end of the equation. */
710 offs += start - (buf + offs);
711 assert(start == &buf[offs]);
712 if (NULL != (end = strchr(buf + offs, delim))) {
713 *end++ = '\0';
714 while (' ' == *end)
715 end++;
716 }
717
718 /* Parse the equation itself. */
719 roff_openeqn(mdoc->roff, NULL, line, offs, buf);
720
721 /* Process a finished equation? */
722 if (roff_closeeqn(mdoc->roff))
723 if ( ! mdoc_addeqn(mdoc, roff_eqn(mdoc->roff)))
724 return(0);
725 offs += (end - (buf + offs));
726 }
727
728 return(1);
729 }
730 #endif
731
732 /*
733 * Parse free-form text, that is, a line that does not begin with the
734 * control character.
735 */
736 static int
737 mdoc_ptext(struct mdoc *mdoc, int line, char *buf, int offs)
738 {
739 char *c, *ws, *end;
740 struct mdoc_node *n;
741
742 /* No text before an initial macro. */
743
744 if (SEC_NONE == mdoc->lastnamed) {
745 mdoc_pmsg(mdoc, line, offs, MANDOCERR_NOTEXT);
746 return(1);
747 }
748
749 assert(mdoc->last);
750 n = mdoc->last;
751
752 /*
753 * Divert directly to list processing if we're encountering a
754 * columnar MDOC_BLOCK with or without a prior MDOC_BLOCK entry
755 * (a MDOC_BODY means it's already open, in which case we should
756 * process within its context in the normal way).
757 */
758
759 if (MDOC_Bl == n->tok && MDOC_BODY == n->type &&
760 LIST_column == n->norm->Bl.type) {
761 /* `Bl' is open without any children. */
762 mdoc->flags |= MDOC_FREECOL;
763 return(mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf));
764 }
765
766 if (MDOC_It == n->tok && MDOC_BLOCK == n->type &&
767 NULL != n->parent &&
768 MDOC_Bl == n->parent->tok &&
769 LIST_column == n->parent->norm->Bl.type) {
770 /* `Bl' has block-level `It' children. */
771 mdoc->flags |= MDOC_FREECOL;
772 return(mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf));
773 }
774
775 /*
776 * Search for the beginning of unescaped trailing whitespace (ws)
777 * and for the first character not to be output (end).
778 */
779
780 /* FIXME: replace with strcspn(). */
781 ws = NULL;
782 for (c = end = buf + offs; *c; c++) {
783 switch (*c) {
784 case ' ':
785 if (NULL == ws)
786 ws = c;
787 continue;
788 case '\t':
789 /*
790 * Always warn about trailing tabs,
791 * even outside literal context,
792 * where they should be put on the next line.
793 */
794 if (NULL == ws)
795 ws = c;
796 /*
797 * Strip trailing tabs in literal context only;
798 * outside, they affect the next line.
799 */
800 if (MDOC_LITERAL & mdoc->flags)
801 continue;
802 break;
803 case '\\':
804 /* Skip the escaped character, too, if any. */
805 if (c[1])
806 c++;
807 /* FALLTHROUGH */
808 default:
809 ws = NULL;
810 break;
811 }
812 end = c + 1;
813 }
814 *end = '\0';
815
816 if (ws)
817 mdoc_pmsg(mdoc, line, (int)(ws-buf), MANDOCERR_EOLNSPACE);
818
819 if ('\0' == buf[offs] && ! (MDOC_LITERAL & mdoc->flags)) {
820 mdoc_pmsg(mdoc, line, (int)(c-buf), MANDOCERR_NOBLANKLN);
821
822 /*
823 * Insert a `sp' in the case of a blank line. Technically,
824 * blank lines aren't allowed, but enough manuals assume this
825 * behaviour that we want to work around it.
826 */
827 if ( ! mdoc_elem_alloc(mdoc, line, offs, MDOC_sp, NULL))
828 return(0);
829
830 mdoc->next = MDOC_NEXT_SIBLING;
831
832 return(mdoc_valid_post(mdoc));
833 }
834
835 if ( ! mdoc_word_alloc(mdoc, line, offs, buf+offs))
836 return(0);
837
838 if (MDOC_LITERAL & mdoc->flags)
839 return(1);
840
841 /*
842 * End-of-sentence check. If the last character is an unescaped
843 * EOS character, then flag the node as being the end of a
844 * sentence. The front-end will know how to interpret this.
845 */
846
847 assert(buf < end);
848
849 if (mandoc_eos(buf+offs, (size_t)(end-buf-offs), 0))
850 mdoc->last->flags |= MDOC_EOS;
851
852 return(1);
853 }
854
855
856 /*
857 * Parse a macro line, that is, a line beginning with the control
858 * character.
859 */
860 static int
861 mdoc_pmacro(struct mdoc *mdoc, int ln, char *buf, int offs)
862 {
863 enum mdoct tok;
864 int i, sv;
865 char mac[5];
866 struct mdoc_node *n;
867
868 /* Empty post-control lines are ignored. */
869
870 if ('"' == buf[offs]) {
871 mdoc_pmsg(mdoc, ln, offs, MANDOCERR_BADCOMMENT);
872 return(1);
873 } else if ('\0' == buf[offs])
874 return(1);
875
876 sv = offs;
877
878 /*
879 * Copy the first word into a nil-terminated buffer.
880 * Stop copying when a tab, space, or eoln is encountered.
881 */
882
883 i = 0;
884 while (i < 4 && '\0' != buf[offs] &&
885 ' ' != buf[offs] && '\t' != buf[offs])
886 mac[i++] = buf[offs++];
887
888 mac[i] = '\0';
889
890 tok = (i > 1 || i < 4) ? mdoc_hash_find(mac) : MDOC_MAX;
891
892 if (MDOC_MAX == tok) {
893 mandoc_vmsg(MANDOCERR_MACRO, mdoc->parse,
894 ln, sv, "%s", buf + sv - 1);
895 return(1);
896 }
897
898 /* Disregard the first trailing tab, if applicable. */
899
900 if ('\t' == buf[offs])
901 offs++;
902
903 /* Jump to the next non-whitespace word. */
904
905 while (buf[offs] && ' ' == buf[offs])
906 offs++;
907
908 /*
909 * Trailing whitespace. Note that tabs are allowed to be passed
910 * into the parser as "text", so we only warn about spaces here.
911 */
912
913 if ('\0' == buf[offs] && ' ' == buf[offs - 1])
914 mdoc_pmsg(mdoc, ln, offs - 1, MANDOCERR_EOLNSPACE);
915
916 /*
917 * If an initial macro or a list invocation, divert directly
918 * into macro processing.
919 */
920
921 if (NULL == mdoc->last || MDOC_It == tok || MDOC_El == tok) {
922 if ( ! mdoc_macro(mdoc, tok, ln, sv, &offs, buf))
923 goto err;
924 return(1);
925 }
926
927 n = mdoc->last;
928 assert(mdoc->last);
929
930 /*
931 * If the first macro of a `Bl -column', open an `It' block
932 * context around the parsed macro.
933 */
934
935 if (MDOC_Bl == n->tok && MDOC_BODY == n->type &&
936 LIST_column == n->norm->Bl.type) {
937 mdoc->flags |= MDOC_FREECOL;
938 if ( ! mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf))
939 goto err;
940 return(1);
941 }
942
943 /*
944 * If we're following a block-level `It' within a `Bl -column'
945 * context (perhaps opened in the above block or in ptext()),
946 * then open an `It' block context around the parsed macro.
947 */
948
949 if (MDOC_It == n->tok && MDOC_BLOCK == n->type &&
950 NULL != n->parent &&
951 MDOC_Bl == n->parent->tok &&
952 LIST_column == n->parent->norm->Bl.type) {
953 mdoc->flags |= MDOC_FREECOL;
954 if ( ! mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf))
955 goto err;
956 return(1);
957 }
958
959 /* Normal processing of a macro. */
960
961 if ( ! mdoc_macro(mdoc, tok, ln, sv, &offs, buf))
962 goto err;
963
964 return(1);
965
966 err: /* Error out. */
967
968 mdoc->flags |= MDOC_HALT;
969 return(0);
970 }
971
972 enum mdelim
973 mdoc_isdelim(const char *p)
974 {
975
976 if ('\0' == p[0])
977 return(DELIM_NONE);
978
979 if ('\0' == p[1])
980 switch (p[0]) {
981 case('('):
982 /* FALLTHROUGH */
983 case('['):
984 return(DELIM_OPEN);
985 case('|'):
986 return(DELIM_MIDDLE);
987 case('.'):
988 /* FALLTHROUGH */
989 case(','):
990 /* FALLTHROUGH */
991 case(';'):
992 /* FALLTHROUGH */
993 case(':'):
994 /* FALLTHROUGH */
995 case('?'):
996 /* FALLTHROUGH */
997 case('!'):
998 /* FALLTHROUGH */
999 case(')'):
1000 /* FALLTHROUGH */
1001 case(']'):
1002 return(DELIM_CLOSE);
1003 default:
1004 return(DELIM_NONE);
1005 }
1006
1007 if ('\\' != p[0])
1008 return(DELIM_NONE);
1009
1010 if (0 == strcmp(p + 1, "."))
1011 return(DELIM_CLOSE);
1012 if (0 == strcmp(p + 1, "fR|\\fP"))
1013 return(DELIM_MIDDLE);
1014
1015 return(DELIM_NONE);
1016 }