1 /* $Id: mdoc_macro.c,v 1.115 2012/01/05 00:43:51 schwarze 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 <assert.h>
23 #include <ctype.h>
24 #include <stdlib.h>
25 #include <stdio.h>
26 #include <string.h>
27 #include <time.h>
28
29 #include "mdoc.h"
30 #include "mandoc.h"
31 #include "libmdoc.h"
32 #include "libmandoc.h"
33
34 enum rew { /* see rew_dohalt() */
35 REWIND_NONE,
36 REWIND_THIS,
37 REWIND_MORE,
38 REWIND_FORCE,
39 REWIND_LATER,
40 REWIND_ERROR
41 };
42
43 static int blk_full(MACRO_PROT_ARGS);
44 static int blk_exp_close(MACRO_PROT_ARGS);
45 static int blk_part_exp(MACRO_PROT_ARGS);
46 static int blk_part_imp(MACRO_PROT_ARGS);
47 static int ctx_synopsis(MACRO_PROT_ARGS);
48 static int in_line_eoln(MACRO_PROT_ARGS);
49 static int in_line_argn(MACRO_PROT_ARGS);
50 static int in_line(MACRO_PROT_ARGS);
51 static int obsolete(MACRO_PROT_ARGS);
52 static int phrase_ta(MACRO_PROT_ARGS);
53
54 static int dword(struct mdoc *, int, int,
55 const char *, enum mdelim);
56 static int append_delims(struct mdoc *,
57 int, int *, char *);
58 static enum mdoct lookup(enum mdoct, const char *);
59 static enum mdoct lookup_raw(const char *);
60 static int make_pending(struct mdoc_node *, enum mdoct,
61 struct mdoc *, int, int);
62 static int phrase(struct mdoc *, int, int, char *);
63 static enum mdoct rew_alt(enum mdoct);
64 static enum rew rew_dohalt(enum mdoct, enum mdoc_type,
65 const struct mdoc_node *);
66 static int rew_elem(struct mdoc *, enum mdoct);
67 static int rew_last(struct mdoc *,
68 const struct mdoc_node *);
69 static int rew_sub(enum mdoc_type, struct mdoc *,
70 enum mdoct, int, int);
71
72 const struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
73 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ap */
74 { in_line_eoln, MDOC_PROLOGUE }, /* Dd */
75 { in_line_eoln, MDOC_PROLOGUE }, /* Dt */
76 { in_line_eoln, MDOC_PROLOGUE }, /* Os */
77 { blk_full, MDOC_PARSED }, /* Sh */
78 { blk_full, MDOC_PARSED }, /* Ss */
79 { in_line_eoln, 0 }, /* Pp */
80 { blk_part_imp, MDOC_PARSED }, /* D1 */
81 { blk_part_imp, MDOC_PARSED }, /* Dl */
82 { blk_full, MDOC_EXPLICIT }, /* Bd */
83 { blk_exp_close, MDOC_EXPLICIT }, /* Ed */
84 { blk_full, MDOC_EXPLICIT }, /* Bl */
85 { blk_exp_close, MDOC_EXPLICIT }, /* El */
86 { blk_full, MDOC_PARSED }, /* It */
87 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
88 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* An */
89 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
90 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cd */
91 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
92 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
93 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
94 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
95 { in_line_eoln, 0 }, /* Ex */
96 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */
97 { in_line_eoln, 0 }, /* Fd */
98 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
99 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */
100 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */
101 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */
102 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
103 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
104 { blk_full, 0 }, /* Nd */
105 { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
106 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
107 { obsolete, 0 }, /* Ot */
108 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
109 { in_line_eoln, 0 }, /* Rv */
110 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */
111 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
112 { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
113 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
114 { in_line_eoln, 0 }, /* %A */
115 { in_line_eoln, 0 }, /* %B */
116 { in_line_eoln, 0 }, /* %D */
117 { in_line_eoln, 0 }, /* %I */
118 { in_line_eoln, 0 }, /* %J */
119 { in_line_eoln, 0 }, /* %N */
120 { in_line_eoln, 0 }, /* %O */
121 { in_line_eoln, 0 }, /* %P */
122 { in_line_eoln, 0 }, /* %R */
123 { in_line_eoln, 0 }, /* %T */
124 { in_line_eoln, 0 }, /* %V */
125 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
126 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
127 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
128 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
129 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
130 { blk_full, MDOC_EXPLICIT }, /* Bf */
131 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bo */
132 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */
133 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
134 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
135 { in_line_eoln, 0 }, /* Db */
136 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
137 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
138 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
139 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
140 { blk_exp_close, MDOC_EXPLICIT }, /* Ef */
141 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Em */
142 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
143 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
144 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
145 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* No */
146 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Ns */
147 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
148 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
149 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
150 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
151 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
152 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
153 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
154 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
155 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
156 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
157 { blk_exp_close, MDOC_EXPLICIT }, /* Re */
158 { blk_full, MDOC_EXPLICIT }, /* Rs */
159 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
160 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* So */
161 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */
162 { in_line_eoln, 0 }, /* Sm */
163 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
164 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
165 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
166 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ux */
167 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
168 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
169 { blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */
170 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Fc */
171 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
172 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
173 { blk_full, MDOC_EXPLICIT }, /* Bk */
174 { blk_exp_close, MDOC_EXPLICIT }, /* Ek */
175 { in_line_eoln, 0 }, /* Bt */
176 { in_line_eoln, 0 }, /* Hf */
177 { obsolete, 0 }, /* Fr */
178 { in_line_eoln, 0 }, /* Ud */
179 { in_line, 0 }, /* Lb */
180 { in_line_eoln, 0 }, /* Lp */
181 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */
182 { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */
183 { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Brq */
184 { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bro */
185 { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Brc */
186 { in_line_eoln, 0 }, /* %C */
187 { obsolete, 0 }, /* Es */
188 { obsolete, 0 }, /* En */
189 { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
190 { in_line_eoln, 0 }, /* %Q */
191 { in_line_eoln, 0 }, /* br */
192 { in_line_eoln, 0 }, /* sp */
193 { in_line_eoln, 0 }, /* %U */
194 { phrase_ta, MDOC_CALLABLE | MDOC_PARSED }, /* Ta */
195 };
196
197 const struct mdoc_macro * const mdoc_macros = __mdoc_macros;
198
199
200 /*
201 * This is called at the end of parsing. It must traverse up the tree,
202 * closing out open [implicit] scopes. Obviously, open explicit scopes
203 * are errors.
204 */
205 int
206 mdoc_macroend(struct mdoc *m)
207 {
208 struct mdoc_node *n;
209
210 /* Scan for open explicit scopes. */
211
212 n = MDOC_VALID & m->last->flags ? m->last->parent : m->last;
213
214 for ( ; n; n = n->parent)
215 if (MDOC_BLOCK == n->type &&
216 MDOC_EXPLICIT & mdoc_macros[n->tok].flags)
217 mdoc_nmsg(m, n, MANDOCERR_SCOPEEXIT);
218
219 /* Rewind to the first. */
220
221 return(rew_last(m, m->first));
222 }
223
224
225 /*
226 * Look up a macro from within a subsequent context.
227 */
228 static enum mdoct
229 lookup(enum mdoct from, const char *p)
230 {
231
232 if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
233 return(MDOC_MAX);
234 return(lookup_raw(p));
235 }
236
237
238 /*
239 * Lookup a macro following the initial line macro.
240 */
241 static enum mdoct
242 lookup_raw(const char *p)
243 {
244 enum mdoct res;
245
246 if (MDOC_MAX == (res = mdoc_hash_find(p)))
247 return(MDOC_MAX);
248 if (MDOC_CALLABLE & mdoc_macros[res].flags)
249 return(res);
250 return(MDOC_MAX);
251 }
252
253
254 static int
255 rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
256 {
257 struct mdoc_node *n, *np;
258
259 assert(to);
260 mdoc->next = MDOC_NEXT_SIBLING;
261
262 /* LINTED */
263 while (mdoc->last != to) {
264 /*
265 * Save the parent here, because we may delete the
266 * m->last node in the post-validation phase and reset
267 * it to m->last->parent, causing a step in the closing
268 * out to be lost.
269 */
270 np = mdoc->last->parent;
271 if ( ! mdoc_valid_post(mdoc))
272 return(0);
273 n = mdoc->last;
274 mdoc->last = np;
275 assert(mdoc->last);
276 mdoc->last->last = n;
277 }
278
279 return(mdoc_valid_post(mdoc));
280 }
281
282
283 /*
284 * For a block closing macro, return the corresponding opening one.
285 * Otherwise, return the macro itself.
286 */
287 static enum mdoct
288 rew_alt(enum mdoct tok)
289 {
290 switch (tok) {
291 case (MDOC_Ac):
292 return(MDOC_Ao);
293 case (MDOC_Bc):
294 return(MDOC_Bo);
295 case (MDOC_Brc):
296 return(MDOC_Bro);
297 case (MDOC_Dc):
298 return(MDOC_Do);
299 case (MDOC_Ec):
300 return(MDOC_Eo);
301 case (MDOC_Ed):
302 return(MDOC_Bd);
303 case (MDOC_Ef):
304 return(MDOC_Bf);
305 case (MDOC_Ek):
306 return(MDOC_Bk);
307 case (MDOC_El):
308 return(MDOC_Bl);
309 case (MDOC_Fc):
310 return(MDOC_Fo);
311 case (MDOC_Oc):
312 return(MDOC_Oo);
313 case (MDOC_Pc):
314 return(MDOC_Po);
315 case (MDOC_Qc):
316 return(MDOC_Qo);
317 case (MDOC_Re):
318 return(MDOC_Rs);
319 case (MDOC_Sc):
320 return(MDOC_So);
321 case (MDOC_Xc):
322 return(MDOC_Xo);
323 default:
324 return(tok);
325 }
326 /* NOTREACHED */
327 }
328
329
330 /*
331 * Rewinding to tok, how do we have to handle *p?
332 * REWIND_NONE: *p would delimit tok, but no tok scope is open
333 * inside *p, so there is no need to rewind anything at all.
334 * REWIND_THIS: *p matches tok, so rewind *p and nothing else.
335 * REWIND_MORE: *p is implicit, rewind it and keep searching for tok.
336 * REWIND_FORCE: *p is explicit, but tok is full, force rewinding *p.
337 * REWIND_LATER: *p is explicit and still open, postpone rewinding.
338 * REWIND_ERROR: No tok block is open at all.
339 */
340 static enum rew
341 rew_dohalt(enum mdoct tok, enum mdoc_type type,
342 const struct mdoc_node *p)
343 {
344
345 /*
346 * No matching token, no delimiting block, no broken block.
347 * This can happen when full implicit macros are called for
348 * the first time but try to rewind their previous
349 * instance anyway.
350 */
351 if (MDOC_ROOT == p->type)
352 return(MDOC_BLOCK == type &&
353 MDOC_EXPLICIT & mdoc_macros[tok].flags ?
354 REWIND_ERROR : REWIND_NONE);
355
356 /*
357 * When starting to rewind, skip plain text
358 * and nodes that have already been rewound.
359 */
360 if (MDOC_TEXT == p->type || MDOC_VALID & p->flags)
361 return(REWIND_MORE);
362
363 /*
364 * The easiest case: Found a matching token.
365 * This applies to both blocks and elements.
366 */
367 tok = rew_alt(tok);
368 if (tok == p->tok)
369 return(p->end ? REWIND_NONE :
370 type == p->type ? REWIND_THIS : REWIND_MORE);
371
372 /*
373 * While elements do require rewinding for themselves,
374 * they never affect rewinding of other nodes.
375 */
376 if (MDOC_ELEM == p->type)
377 return(REWIND_MORE);
378
379 /*
380 * Blocks delimited by our target token get REWIND_MORE.
381 * Blocks delimiting our target token get REWIND_NONE.
382 */
383 switch (tok) {
384 case (MDOC_Bl):
385 if (MDOC_It == p->tok)
386 return(REWIND_MORE);
387 break;
388 case (MDOC_It):
389 if (MDOC_BODY == p->type && MDOC_Bl == p->tok)
390 return(REWIND_NONE);
391 break;
392 /*
393 * XXX Badly nested block handling still fails badly
394 * when one block is breaking two blocks of the same type.
395 * This is an incomplete and extremely ugly workaround,
396 * required to let the OpenBSD tree build.
397 */
398 case (MDOC_Oo):
399 if (MDOC_Op == p->tok)
400 return(REWIND_MORE);
401 break;
402 case (MDOC_Nm):
403 return(REWIND_NONE);
404 case (MDOC_Nd):
405 /* FALLTHROUGH */
406 case (MDOC_Ss):
407 if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
408 return(REWIND_NONE);
409 /* FALLTHROUGH */
410 case (MDOC_Sh):
411 if (MDOC_Nd == p->tok || MDOC_Ss == p->tok ||
412 MDOC_Sh == p->tok)
413 return(REWIND_MORE);
414 break;
415 default:
416 break;
417 }
418
419 /*
420 * Default block rewinding rules.
421 * In particular, always skip block end markers,
422 * and let all blocks rewind Nm children.
423 */
424 if (ENDBODY_NOT != p->end || MDOC_Nm == p->tok ||
425 (MDOC_BLOCK == p->type &&
426 ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)))
427 return(REWIND_MORE);
428
429 /*
430 * By default, closing out full blocks
431 * forces closing of broken explicit blocks,
432 * while closing out partial blocks
433 * allows delayed rewinding by default.
434 */
435 return (&blk_full == mdoc_macros[tok].fp ?
436 REWIND_FORCE : REWIND_LATER);
437 }
438
439
440 static int
441 rew_elem(struct mdoc *mdoc, enum mdoct tok)
442 {
443 struct mdoc_node *n;
444
445 n = mdoc->last;
446 if (MDOC_ELEM != n->type)
447 n = n->parent;
448 assert(MDOC_ELEM == n->type);
449 assert(tok == n->tok);
450
451 return(rew_last(mdoc, n));
452 }
453
454
455 /*
456 * We are trying to close a block identified by tok,
457 * but the child block *broken is still open.
458 * Thus, postpone closing the tok block
459 * until the rew_sub call closing *broken.
460 */
461 static int
462 make_pending(struct mdoc_node *broken, enum mdoct tok,
463 struct mdoc *m, int line, int ppos)
464 {
465 struct mdoc_node *breaker;
466
467 /*
468 * Iterate backwards, searching for the block matching tok,
469 * that is, the block breaking the *broken block.
470 */
471 for (breaker = broken->parent; breaker; breaker = breaker->parent) {
472
473 /*
474 * If the *broken block had already been broken before
475 * and we encounter its breaker, make the tok block
476 * pending on the inner breaker.
477 * Graphically, "[A breaker=[B broken=[C->B B] tok=A] C]"
478 * becomes "[A broken=[B [C->B B] tok=A] C]"
479 * and finally "[A [B->A [C->B B] A] C]".
480 */
481 if (breaker == broken->pending) {
482 broken = breaker;
483 continue;
484 }
485
486 if (REWIND_THIS != rew_dohalt(tok, MDOC_BLOCK, breaker))
487 continue;
488 if (MDOC_BODY == broken->type)
489 broken = broken->parent;
490
491 /*
492 * Found the breaker.
493 * If another, outer breaker is already pending on
494 * the *broken block, we must not clobber the link
495 * to the outer breaker, but make it pending on the
496 * new, now inner breaker.
497 * Graphically, "[A breaker=[B broken=[C->A A] tok=B] C]"
498 * becomes "[A breaker=[B->A broken=[C A] tok=B] C]"
499 * and finally "[A [B->A [C->B A] B] C]".
500 */
501 if (broken->pending) {
502 struct mdoc_node *taker;
503
504 /*
505 * If the breaker had also been broken before,
506 * it cannot take on the outer breaker itself,
507 * but must hand it on to its own breakers.
508 * Graphically, this is the following situation:
509 * "[A [B breaker=[C->B B] broken=[D->A A] tok=C] D]"
510 * "[A taker=[B->A breaker=[C->B B] [D->C A] C] D]"
511 */
512 taker = breaker;
513 while (taker->pending)
514 taker = taker->pending;
515 taker->pending = broken->pending;
516 }
517 broken->pending = breaker;
518 mandoc_vmsg(MANDOCERR_SCOPENEST, m->parse, line, ppos,
519 "%s breaks %s", mdoc_macronames[tok],
520 mdoc_macronames[broken->tok]);
521 return(1);
522 }
523
524 /*
525 * Found no matching block for tok.
526 * Are you trying to close a block that is not open?
527 */
528 return(0);
529 }
530
531
532 static int
533 rew_sub(enum mdoc_type t, struct mdoc *m,
534 enum mdoct tok, int line, int ppos)
535 {
536 struct mdoc_node *n;
537
538 n = m->last;
539 while (n) {
540 switch (rew_dohalt(tok, t, n)) {
541 case (REWIND_NONE):
542 return(1);
543 case (REWIND_THIS):
544 break;
545 case (REWIND_FORCE):
546 mandoc_vmsg(MANDOCERR_SCOPEBROKEN, m->parse,
547 line, ppos, "%s breaks %s",
548 mdoc_macronames[tok],
549 mdoc_macronames[n->tok]);
550 /* FALLTHROUGH */
551 case (REWIND_MORE):
552 n = n->parent;
553 continue;
554 case (REWIND_LATER):
555 if (make_pending(n, tok, m, line, ppos) ||
556 MDOC_BLOCK != t)
557 return(1);
558 /* FALLTHROUGH */
559 case (REWIND_ERROR):
560 mdoc_pmsg(m, line, ppos, MANDOCERR_NOSCOPE);
561 return(1);
562 }
563 break;
564 }
565
566 assert(n);
567 if ( ! rew_last(m, n))
568 return(0);
569
570 /*
571 * The current block extends an enclosing block.
572 * Now that the current block ends, close the enclosing block, too.
573 */
574 while (NULL != (n = n->pending)) {
575 if ( ! rew_last(m, n))
576 return(0);
577 if (MDOC_HEAD == n->type &&
578 ! mdoc_body_alloc(m, n->line, n->pos, n->tok))
579 return(0);
580 }
581
582 return(1);
583 }
584
585 /*
586 * Allocate a word and check whether it's punctuation or not.
587 * Punctuation consists of those tokens found in mdoc_isdelim().
588 */
589 static int
590 dword(struct mdoc *m, int line,
591 int col, const char *p, enum mdelim d)
592 {
593
594 if (DELIM_MAX == d)
595 d = mdoc_isdelim(p);
596
597 if ( ! mdoc_word_alloc(m, line, col, p))
598 return(0);
599
600 if (DELIM_OPEN == d)
601 m->last->flags |= MDOC_DELIMO;
602
603 /*
604 * Closing delimiters only suppress the preceding space
605 * when they follow something, not when they start a new
606 * block or element, and not when they follow `No'.
607 *
608 * XXX Explicitly special-casing MDOC_No here feels
609 * like a layering violation. Find a better way
610 * and solve this in the code related to `No'!
611 */
612
613 else if (DELIM_CLOSE == d && m->last->prev &&
614 m->last->prev->tok != MDOC_No)
615 m->last->flags |= MDOC_DELIMC;
616
617 return(1);
618 }
619
620 static int
621 append_delims(struct mdoc *m, int line, int *pos, char *buf)
622 {
623 int la;
624 enum margserr ac;
625 char *p;
626
627 if ('\0' == buf[*pos])
628 return(1);
629
630 for (;;) {
631 la = *pos;
632 ac = mdoc_zargs(m, line, pos, buf, &p);
633
634 if (ARGS_ERROR == ac)
635 return(0);
636 else if (ARGS_EOLN == ac)
637 break;
638
639 dword(m, line, la, p, DELIM_MAX);
640
641 /*
642 * If we encounter end-of-sentence symbols, then trigger
643 * the double-space.
644 *
645 * XXX: it's easy to allow this to propagate outward to
646 * the last symbol, such that `. )' will cause the
647 * correct double-spacing. However, (1) groff isn't
648 * smart enough to do this and (2) it would require
649 * knowing which symbols break this behaviour, for
650 * example, `. ;' shouldn't propagate the double-space.
651 */
652 if (mandoc_eos(p, strlen(p), 0))
653 m->last->flags |= MDOC_EOS;
654 }
655
656 return(1);
657 }
658
659
660 /*
661 * Close out block partial/full explicit.
662 */
663 static int
664 blk_exp_close(MACRO_PROT_ARGS)
665 {
666 struct mdoc_node *body; /* Our own body. */
667 struct mdoc_node *later; /* A sub-block starting later. */
668 struct mdoc_node *n; /* For searching backwards. */
669
670 int j, lastarg, maxargs, flushed, nl;
671 enum margserr ac;
672 enum mdoct atok, ntok;
673 char *p;
674
675 nl = MDOC_NEWLINE & m->flags;
676
677 switch (tok) {
678 case (MDOC_Ec):
679 maxargs = 1;
680 break;
681 default:
682 maxargs = 0;
683 break;
684 }
685
686 /*
687 * Search backwards for beginnings of blocks,
688 * both of our own and of pending sub-blocks.
689 */
690 atok = rew_alt(tok);
691 body = later = NULL;
692 for (n = m->last; n; n = n->parent) {
693 if (MDOC_VALID & n->flags)
694 continue;
695
696 /* Remember the start of our own body. */
697 if (MDOC_BODY == n->type && atok == n->tok) {
698 if (ENDBODY_NOT == n->end)
699 body = n;
700 continue;
701 }
702
703 if (MDOC_BLOCK != n->type || MDOC_Nm == n->tok)
704 continue;
705 if (atok == n->tok) {
706 assert(body);
707
708 /*
709 * Found the start of our own block.
710 * When there is no pending sub block,
711 * just proceed to closing out.
712 */
713 if (NULL == later)
714 break;
715
716 /*
717 * When there is a pending sub block,
718 * postpone closing out the current block
719 * until the rew_sub() closing out the sub-block.
720 */
721 make_pending(later, tok, m, line, ppos);
722
723 /*
724 * Mark the place where the formatting - but not
725 * the scope - of the current block ends.
726 */
727 if ( ! mdoc_endbody_alloc(m, line, ppos,
728 atok, body, ENDBODY_SPACE))
729 return(0);
730 break;
731 }
732
733 /*
734 * When finding an open sub block, remember the last
735 * open explicit block, or, in case there are only
736 * implicit ones, the first open implicit block.
737 */
738 if (later &&
739 MDOC_EXPLICIT & mdoc_macros[later->tok].flags)
740 continue;
741 if (MDOC_CALLABLE & mdoc_macros[n->tok].flags)
742 later = n;
743 }
744
745 if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
746 /* FIXME: do this in validate */
747 if (buf[*pos])
748 mdoc_pmsg(m, line, ppos, MANDOCERR_ARGSLOST);
749
750 if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
751 return(0);
752 return(rew_sub(MDOC_BLOCK, m, tok, line, ppos));
753 }
754
755 if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
756 return(0);
757
758 if (NULL == later && maxargs > 0)
759 if ( ! mdoc_tail_alloc(m, line, ppos, rew_alt(tok)))
760 return(0);
761
762 for (flushed = j = 0; ; j++) {
763 lastarg = *pos;
764
765 if (j == maxargs && ! flushed) {
766 if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
767 return(0);
768 flushed = 1;
769 }
770
771 ac = mdoc_args(m, line, pos, buf, tok, &p);
772
773 if (ARGS_ERROR == ac)
774 return(0);
775 if (ARGS_PUNCT == ac)
776 break;
777 if (ARGS_EOLN == ac)
778 break;
779
780 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
781
782 if (MDOC_MAX == ntok) {
783 if ( ! dword(m, line, lastarg, p, DELIM_MAX))
784 return(0);
785 continue;
786 }
787
788 if ( ! flushed) {
789 if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
790 return(0);
791 flushed = 1;
792 }
793 if ( ! mdoc_macro(m, ntok, line, lastarg, pos, buf))
794 return(0);
795 break;
796 }
797
798 if ( ! flushed && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
799 return(0);
800
801 if ( ! nl)
802 return(1);
803 return(append_delims(m, line, pos, buf));
804 }
805
806
807 static int
808 in_line(MACRO_PROT_ARGS)
809 {
810 int la, scope, cnt, nc, nl;
811 enum margverr av;
812 enum mdoct ntok;
813 enum margserr ac;
814 enum mdelim d;
815 struct mdoc_arg *arg;
816 char *p;
817
818 nl = MDOC_NEWLINE & m->flags;
819
820 /*
821 * Whether we allow ignored elements (those without content,
822 * usually because of reserved words) to squeak by.
823 */
824
825 switch (tok) {
826 case (MDOC_An):
827 /* FALLTHROUGH */
828 case (MDOC_Ar):
829 /* FALLTHROUGH */
830 case (MDOC_Fl):
831 /* FALLTHROUGH */
832 case (MDOC_Mt):
833 /* FALLTHROUGH */
834 case (MDOC_Nm):
835 /* FALLTHROUGH */
836 case (MDOC_Pa):
837 nc = 1;
838 break;
839 default:
840 nc = 0;
841 break;
842 }
843
844 for (arg = NULL;; ) {
845 la = *pos;
846 av = mdoc_argv(m, line, tok, &arg, pos, buf);
847
848 if (ARGV_WORD == av) {
849 *pos = la;
850 break;
851 }
852 if (ARGV_EOLN == av)
853 break;
854 if (ARGV_ARG == av)
855 continue;
856
857 mdoc_argv_free(arg);
858 return(0);
859 }
860
861 for (cnt = scope = 0;; ) {
862 la = *pos;
863 ac = mdoc_args(m, line, pos, buf, tok, &p);
864
865 if (ARGS_ERROR == ac)
866 return(0);
867 if (ARGS_EOLN == ac)
868 break;
869 if (ARGS_PUNCT == ac)
870 break;
871
872 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
873
874 /*
875 * In this case, we've located a submacro and must
876 * execute it. Close out scope, if open. If no
877 * elements have been generated, either create one (nc)
878 * or raise a warning.
879 */
880
881 if (MDOC_MAX != ntok) {
882 if (scope && ! rew_elem(m, tok))
883 return(0);
884 if (nc && 0 == cnt) {
885 if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
886 return(0);
887 if ( ! rew_last(m, m->last))
888 return(0);
889 } else if ( ! nc && 0 == cnt) {
890 mdoc_argv_free(arg);
891 mdoc_pmsg(m, line, ppos, MANDOCERR_MACROEMPTY);
892 }
893
894 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
895 return(0);
896 if ( ! nl)
897 return(1);
898 return(append_delims(m, line, pos, buf));
899 }
900
901 /*
902 * Non-quote-enclosed punctuation. Set up our scope, if
903 * a word; rewind the scope, if a delimiter; then append
904 * the word.
905 */
906
907 d = ARGS_QWORD == ac ? DELIM_NONE : mdoc_isdelim(p);
908
909 if (DELIM_NONE != d) {
910 /*
911 * If we encounter closing punctuation, no word
912 * has been omitted, no scope is open, and we're
913 * allowed to have an empty element, then start
914 * a new scope. `Ar', `Fl', and `Li', only do
915 * this once per invocation. There may be more
916 * of these (all of them?).
917 */
918 if (0 == cnt && (nc || MDOC_Li == tok) &&
919 DELIM_CLOSE == d && ! scope) {
920 if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
921 return(0);
922 if (MDOC_Ar == tok || MDOC_Li == tok ||
923 MDOC_Fl == tok)
924 cnt++;
925 scope = 1;
926 }
927 /*
928 * Close out our scope, if one is open, before
929 * any punctuation.
930 */
931 if (scope && ! rew_elem(m, tok))
932 return(0);
933 scope = 0;
934 } else if ( ! scope) {
935 if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
936 return(0);
937 scope = 1;
938 }
939
940 if (DELIM_NONE == d)
941 cnt++;
942
943 if ( ! dword(m, line, la, p, d))
944 return(0);
945
946 /*
947 * `Fl' macros have their scope re-opened with each new
948 * word so that the `-' can be added to each one without
949 * having to parse out spaces.
950 */
951 if (scope && MDOC_Fl == tok) {
952 if ( ! rew_elem(m, tok))
953 return(0);
954 scope = 0;
955 }
956 }
957
958 if (scope && ! rew_elem(m, tok))
959 return(0);
960
961 /*
962 * If no elements have been collected and we're allowed to have
963 * empties (nc), open a scope and close it out. Otherwise,
964 * raise a warning.
965 */
966
967 if (nc && 0 == cnt) {
968 if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
969 return(0);
970 if ( ! rew_last(m, m->last))
971 return(0);
972 } else if ( ! nc && 0 == cnt) {
973 mdoc_argv_free(arg);
974 mdoc_pmsg(m, line, ppos, MANDOCERR_MACROEMPTY);
975 }
976
977 if ( ! nl)
978 return(1);
979 return(append_delims(m, line, pos, buf));
980 }
981
982
983 static int
984 blk_full(MACRO_PROT_ARGS)
985 {
986 int la, nl, nparsed;
987 struct mdoc_arg *arg;
988 struct mdoc_node *head; /* save of head macro */
989 struct mdoc_node *body; /* save of body macro */
990 struct mdoc_node *n;
991 enum mdoc_type mtt;
992 enum mdoct ntok;
993 enum margserr ac, lac;
994 enum margverr av;
995 char *p;
996
997 nl = MDOC_NEWLINE & m->flags;
998
999 /* Close out prior implicit scope. */
1000
1001 if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
1002 if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1003 return(0);
1004 if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1005 return(0);
1006 }
1007
1008 /*
1009 * This routine accommodates implicitly- and explicitly-scoped
1010 * macro openings. Implicit ones first close out prior scope
1011 * (seen above). Delay opening the head until necessary to
1012 * allow leading punctuation to print. Special consideration
1013 * for `It -column', which has phrase-part syntax instead of
1014 * regular child nodes.
1015 */
1016
1017 for (arg = NULL;; ) {
1018 la = *pos;
1019 av = mdoc_argv(m, line, tok, &arg, pos, buf);
1020
1021 if (ARGV_WORD == av) {
1022 *pos = la;
1023 break;
1024 }
1025
1026 if (ARGV_EOLN == av)
1027 break;
1028 if (ARGV_ARG == av)
1029 continue;
1030
1031 mdoc_argv_free(arg);
1032 return(0);
1033 }
1034
1035 if ( ! mdoc_block_alloc(m, line, ppos, tok, arg))
1036 return(0);
1037
1038 head = body = NULL;
1039
1040 /*
1041 * Exception: Heads of `It' macros in `-diag' lists are not
1042 * parsed, even though `It' macros in general are parsed.
1043 */
1044 nparsed = MDOC_It == tok &&
1045 MDOC_Bl == m->last->parent->tok &&
1046 LIST_diag == m->last->parent->norm->Bl.type;
1047
1048 /*
1049 * The `Nd' macro has all arguments in its body: it's a hybrid
1050 * of block partial-explicit and full-implicit. Stupid.
1051 */
1052
1053 if (MDOC_Nd == tok) {
1054 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1055 return(0);
1056 head = m->last;
1057 if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1058 return(0);
1059 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1060 return(0);
1061 body = m->last;
1062 }
1063
1064 ac = ARGS_ERROR;
1065
1066 for ( ; ; ) {
1067 la = *pos;
1068 /* Initialise last-phrase-type with ARGS_PEND. */
1069 lac = ARGS_ERROR == ac ? ARGS_PEND : ac;
1070 ac = mdoc_args(m, line, pos, buf, tok, &p);
1071
1072 if (ARGS_PUNCT == ac)
1073 break;
1074
1075 if (ARGS_ERROR == ac)
1076 return(0);
1077
1078 if (ARGS_EOLN == ac) {
1079 if (ARGS_PPHRASE != lac && ARGS_PHRASE != lac)
1080 break;
1081 /*
1082 * This is necessary: if the last token on a
1083 * line is a `Ta' or tab, then we'll get
1084 * ARGS_EOLN, so we must be smart enough to
1085 * reopen our scope if the last parse was a
1086 * phrase or partial phrase.
1087 */
1088 if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1089 return(0);
1090 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1091 return(0);
1092 body = m->last;
1093 break;
1094 }
1095
1096 /*
1097 * Emit leading punctuation (i.e., punctuation before
1098 * the MDOC_HEAD) for non-phrase types.
1099 */
1100
1101 if (NULL == head &&
1102 ARGS_PEND != ac &&
1103 ARGS_PHRASE != ac &&
1104 ARGS_PPHRASE != ac &&
1105 ARGS_QWORD != ac &&
1106 DELIM_OPEN == mdoc_isdelim(p)) {
1107 if ( ! dword(m, line, la, p, DELIM_OPEN))
1108 return(0);
1109 continue;
1110 }
1111
1112 /* Open a head if one hasn't been opened. */
1113
1114 if (NULL == head) {
1115 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1116 return(0);
1117 head = m->last;
1118 }
1119
1120 if (ARGS_PHRASE == ac ||
1121 ARGS_PEND == ac ||
1122 ARGS_PPHRASE == ac) {
1123 /*
1124 * If we haven't opened a body yet, rewind the
1125 * head; if we have, rewind that instead.
1126 */
1127
1128 mtt = body ? MDOC_BODY : MDOC_HEAD;
1129 if ( ! rew_sub(mtt, m, tok, line, ppos))
1130 return(0);
1131
1132 /* Then allocate our body context. */
1133
1134 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1135 return(0);
1136 body = m->last;
1137
1138 /*
1139 * Process phrases: set whether we're in a
1140 * partial-phrase (this effects line handling)
1141 * then call down into the phrase parser.
1142 */
1143
1144 if (ARGS_PPHRASE == ac)
1145 m->flags |= MDOC_PPHRASE;
1146 if (ARGS_PEND == ac && ARGS_PPHRASE == lac)
1147 m->flags |= MDOC_PPHRASE;
1148
1149 if ( ! phrase(m, line, la, buf))
1150 return(0);
1151
1152 m->flags &= ~MDOC_PPHRASE;
1153 continue;
1154 }
1155
1156 ntok = nparsed || ARGS_QWORD == ac ?
1157 MDOC_MAX : lookup(tok, p);
1158
1159 if (MDOC_MAX == ntok) {
1160 if ( ! dword(m, line, la, p, DELIM_MAX))
1161 return(0);
1162 continue;
1163 }
1164
1165 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1166 return(0);
1167 break;
1168 }
1169
1170 if (NULL == head) {
1171 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1172 return(0);
1173 head = m->last;
1174 }
1175
1176 if (nl && ! append_delims(m, line, pos, buf))
1177 return(0);
1178
1179 /* If we've already opened our body, exit now. */
1180
1181 if (NULL != body)
1182 goto out;
1183
1184 /*
1185 * If there is an open (i.e., unvalidated) sub-block requiring
1186 * explicit close-out, postpone switching the current block from
1187 * head to body until the rew_sub() call closing out that
1188 * sub-block.
1189 */
1190 for (n = m->last; n && n != head; n = n->parent) {
1191 if (MDOC_BLOCK == n->type &&
1192 MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
1193 ! (MDOC_VALID & n->flags)) {
1194 n->pending = head;
1195 return(1);
1196 }
1197 }
1198
1199 /* Close out scopes to remain in a consistent state. */
1200
1201 if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1202 return(0);
1203 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1204 return(0);
1205
1206 out:
1207 if ( ! (MDOC_FREECOL & m->flags))
1208 return(1);
1209
1210 if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1211 return(0);
1212 if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1213 return(0);
1214
1215 m->flags &= ~MDOC_FREECOL;
1216 return(1);
1217 }
1218
1219
1220 static int
1221 blk_part_imp(MACRO_PROT_ARGS)
1222 {
1223 int la, nl;
1224 enum mdoct ntok;
1225 enum margserr ac;
1226 char *p;
1227 struct mdoc_node *blk; /* saved block context */
1228 struct mdoc_node *body; /* saved body context */
1229 struct mdoc_node *n;
1230
1231 nl = MDOC_NEWLINE & m->flags;
1232
1233 /*
1234 * A macro that spans to the end of the line. This is generally
1235 * (but not necessarily) called as the first macro. The block
1236 * has a head as the immediate child, which is always empty,
1237 * followed by zero or more opening punctuation nodes, then the
1238 * body (which may be empty, depending on the macro), then zero
1239 * or more closing punctuation nodes.
1240 */
1241
1242 if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
1243 return(0);
1244
1245 blk = m->last;
1246
1247 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1248 return(0);
1249 if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1250 return(0);
1251
1252 /*
1253 * Open the body scope "on-demand", that is, after we've
1254 * processed all our the leading delimiters (open parenthesis,
1255 * etc.).
1256 */
1257
1258 for (body = NULL; ; ) {
1259 la = *pos;
1260 ac = mdoc_args(m, line, pos, buf, tok, &p);
1261
1262 if (ARGS_ERROR == ac)
1263 return(0);
1264 if (ARGS_EOLN == ac)
1265 break;
1266 if (ARGS_PUNCT == ac)
1267 break;
1268
1269 if (NULL == body && ARGS_QWORD != ac &&
1270 DELIM_OPEN == mdoc_isdelim(p)) {
1271 if ( ! dword(m, line, la, p, DELIM_OPEN))
1272 return(0);
1273 continue;
1274 }
1275
1276 if (NULL == body) {
1277 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1278 return(0);
1279 body = m->last;
1280 }
1281
1282 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1283
1284 if (MDOC_MAX == ntok) {
1285 if ( ! dword(m, line, la, p, DELIM_MAX))
1286 return(0);
1287 continue;
1288 }
1289
1290 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1291 return(0);
1292 break;
1293 }
1294
1295 /* Clean-ups to leave in a consistent state. */
1296
1297 if (NULL == body) {
1298 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1299 return(0);
1300 body = m->last;
1301 }
1302
1303 for (n = body->child; n && n->next; n = n->next)
1304 /* Do nothing. */ ;
1305
1306 /*
1307 * End of sentence spacing: if the last node is a text node and
1308 * has a trailing period, then mark it as being end-of-sentence.
1309 */
1310
1311 if (n && MDOC_TEXT == n->type && n->string)
1312 if (mandoc_eos(n->string, strlen(n->string), 1))
1313 n->flags |= MDOC_EOS;
1314
1315 /* Up-propagate the end-of-space flag. */
1316
1317 if (n && (MDOC_EOS & n->flags)) {
1318 body->flags |= MDOC_EOS;
1319 body->parent->flags |= MDOC_EOS;
1320 }
1321
1322 /*
1323 * If there is an open sub-block requiring explicit close-out,
1324 * postpone closing out the current block
1325 * until the rew_sub() call closing out the sub-block.
1326 */
1327 for (n = m->last; n && n != body && n != blk->parent; n = n->parent) {
1328 if (MDOC_BLOCK == n->type &&
1329 MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
1330 ! (MDOC_VALID & n->flags)) {
1331 make_pending(n, tok, m, line, ppos);
1332 if ( ! mdoc_endbody_alloc(m, line, ppos,
1333 tok, body, ENDBODY_NOSPACE))
1334 return(0);
1335 return(1);
1336 }
1337 }
1338
1339 /*
1340 * If we can't rewind to our body, then our scope has already
1341 * been closed by another macro (like `Oc' closing `Op'). This
1342 * is ugly behaviour nodding its head to OpenBSD's overwhelming
1343 * crufty use of `Op' breakage.
1344 */
1345 if (n != body)
1346 mandoc_vmsg(MANDOCERR_SCOPENEST, m->parse, line, ppos,
1347 "%s broken", mdoc_macronames[tok]);
1348
1349 if (n && ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1350 return(0);
1351
1352 /* Standard appending of delimiters. */
1353
1354 if (nl && ! append_delims(m, line, pos, buf))
1355 return(0);
1356
1357 /* Rewind scope, if applicable. */
1358
1359 if (n && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1360 return(0);
1361
1362 return(1);
1363 }
1364
1365
1366 static int
1367 blk_part_exp(MACRO_PROT_ARGS)
1368 {
1369 int la, nl;
1370 enum margserr ac;
1371 struct mdoc_node *head; /* keep track of head */
1372 struct mdoc_node *body; /* keep track of body */
1373 char *p;
1374 enum mdoct ntok;
1375
1376 nl = MDOC_NEWLINE & m->flags;
1377
1378 /*
1379 * The opening of an explicit macro having zero or more leading
1380 * punctuation nodes; a head with optional single element (the
1381 * case of `Eo'); and a body that may be empty.
1382 */
1383
1384 if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
1385 return(0);
1386
1387 for (head = body = NULL; ; ) {
1388 la = *pos;
1389 ac = mdoc_args(m, line, pos, buf, tok, &p);
1390
1391 if (ARGS_ERROR == ac)
1392 return(0);
1393 if (ARGS_PUNCT == ac)
1394 break;
1395 if (ARGS_EOLN == ac)
1396 break;
1397
1398 /* Flush out leading punctuation. */
1399
1400 if (NULL == head && ARGS_QWORD != ac &&
1401 DELIM_OPEN == mdoc_isdelim(p)) {
1402 assert(NULL == body);
1403 if ( ! dword(m, line, la, p, DELIM_OPEN))
1404 return(0);
1405 continue;
1406 }
1407
1408 if (NULL == head) {
1409 assert(NULL == body);
1410 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1411 return(0);
1412 head = m->last;
1413 }
1414
1415 /*
1416 * `Eo' gobbles any data into the head, but most other
1417 * macros just immediately close out and begin the body.
1418 */
1419
1420 if (NULL == body) {
1421 assert(head);
1422 /* No check whether it's a macro! */
1423 if (MDOC_Eo == tok)
1424 if ( ! dword(m, line, la, p, DELIM_MAX))
1425 return(0);
1426
1427 if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1428 return(0);
1429 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1430 return(0);
1431 body = m->last;
1432
1433 if (MDOC_Eo == tok)
1434 continue;
1435 }
1436
1437 assert(NULL != head && NULL != body);
1438
1439 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1440
1441 if (MDOC_MAX == ntok) {
1442 if ( ! dword(m, line, la, p, DELIM_MAX))
1443 return(0);
1444 continue;
1445 }
1446
1447 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1448 return(0);
1449 break;
1450 }
1451
1452 /* Clean-up to leave in a consistent state. */
1453
1454 if (NULL == head)
1455 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1456 return(0);
1457
1458 if (NULL == body) {
1459 if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1460 return(0);
1461 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1462 return(0);
1463 }
1464
1465 /* Standard appending of delimiters. */
1466
1467 if ( ! nl)
1468 return(1);
1469 return(append_delims(m, line, pos, buf));
1470 }
1471
1472
1473 /* ARGSUSED */
1474 static int
1475 in_line_argn(MACRO_PROT_ARGS)
1476 {
1477 int la, flushed, j, maxargs, nl;
1478 enum margserr ac;
1479 enum margverr av;
1480 struct mdoc_arg *arg;
1481 char *p;
1482 enum mdoct ntok;
1483
1484 nl = MDOC_NEWLINE & m->flags;
1485
1486 /*
1487 * A line macro that has a fixed number of arguments (maxargs).
1488 * Only open the scope once the first non-leading-punctuation is
1489 * found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
1490 * keep it open until the maximum number of arguments are
1491 * exhausted.
1492 */
1493
1494 switch (tok) {
1495 case (MDOC_Ap):
1496 /* FALLTHROUGH */
1497 case (MDOC_No):
1498 /* FALLTHROUGH */
1499 case (MDOC_Ns):
1500 /* FALLTHROUGH */
1501 case (MDOC_Ux):
1502 maxargs = 0;
1503 break;
1504 case (MDOC_Bx):
1505 /* FALLTHROUGH */
1506 case (MDOC_Xr):
1507 maxargs = 2;
1508 break;
1509 default:
1510 maxargs = 1;
1511 break;
1512 }
1513
1514 for (arg = NULL; ; ) {
1515 la = *pos;
1516 av = mdoc_argv(m, line, tok, &arg, pos, buf);
1517
1518 if (ARGV_WORD == av) {
1519 *pos = la;
1520 break;
1521 }
1522
1523 if (ARGV_EOLN == av)
1524 break;
1525 if (ARGV_ARG == av)
1526 continue;
1527
1528 mdoc_argv_free(arg);
1529 return(0);
1530 }
1531
1532 for (flushed = j = 0; ; ) {
1533 la = *pos;
1534 ac = mdoc_args(m, line, pos, buf, tok, &p);
1535
1536 if (ARGS_ERROR == ac)
1537 return(0);
1538 if (ARGS_PUNCT == ac)
1539 break;
1540 if (ARGS_EOLN == ac)
1541 break;
1542
1543 if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1544 ARGS_QWORD != ac && 0 == j &&
1545 DELIM_OPEN == mdoc_isdelim(p)) {
1546 if ( ! dword(m, line, la, p, DELIM_OPEN))
1547 return(0);
1548 continue;
1549 } else if (0 == j)
1550 if ( ! mdoc_elem_alloc(m, line, la, tok, arg))
1551 return(0);
1552
1553 if (j == maxargs && ! flushed) {
1554 if ( ! rew_elem(m, tok))
1555 return(0);
1556 flushed = 1;
1557 }
1558
1559 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1560
1561 if (MDOC_MAX != ntok) {
1562 if ( ! flushed && ! rew_elem(m, tok))
1563 return(0);
1564 flushed = 1;
1565 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1566 return(0);
1567 j++;
1568 break;
1569 }
1570
1571 if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1572 ARGS_QWORD != ac &&
1573 ! flushed &&
1574 DELIM_NONE != mdoc_isdelim(p)) {
1575 if ( ! rew_elem(m, tok))
1576 return(0);
1577 flushed = 1;
1578 }
1579
1580 if ( ! dword(m, line, la, p, DELIM_MAX))
1581 return(0);
1582 j++;
1583 }
1584
1585 if (0 == j && ! mdoc_elem_alloc(m, line, la, tok, arg))
1586 return(0);
1587
1588 /* Close out in a consistent state. */
1589
1590 if ( ! flushed && ! rew_elem(m, tok))
1591 return(0);
1592 if ( ! nl)
1593 return(1);
1594 return(append_delims(m, line, pos, buf));
1595 }
1596
1597
1598 static int
1599 in_line_eoln(MACRO_PROT_ARGS)
1600 {
1601 int la;
1602 enum margserr ac;
1603 enum margverr av;
1604 struct mdoc_arg *arg;
1605 char *p;
1606 enum mdoct ntok;
1607
1608 assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
1609
1610 if (tok == MDOC_Pp)
1611 rew_sub(MDOC_BLOCK, m, MDOC_Nm, line, ppos);
1612
1613 /* Parse macro arguments. */
1614
1615 for (arg = NULL; ; ) {
1616 la = *pos;
1617 av = mdoc_argv(m, line, tok, &arg, pos, buf);
1618
1619 if (ARGV_WORD == av) {
1620 *pos = la;
1621 break;
1622 }
1623 if (ARGV_EOLN == av)
1624 break;
1625 if (ARGV_ARG == av)
1626 continue;
1627
1628 mdoc_argv_free(arg);
1629 return(0);
1630 }
1631
1632 /* Open element scope. */
1633
1634 if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1635 return(0);
1636
1637 /* Parse argument terms. */
1638
1639 for (;;) {
1640 la = *pos;
1641 ac = mdoc_args(m, line, pos, buf, tok, &p);
1642
1643 if (ARGS_ERROR == ac)
1644 return(0);
1645 if (ARGS_EOLN == ac)
1646 break;
1647
1648 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1649
1650 if (MDOC_MAX == ntok) {
1651 if ( ! dword(m, line, la, p, DELIM_MAX))
1652 return(0);
1653 continue;
1654 }
1655
1656 if ( ! rew_elem(m, tok))
1657 return(0);
1658 return(mdoc_macro(m, ntok, line, la, pos, buf));
1659 }
1660
1661 /* Close out (no delimiters). */
1662
1663 return(rew_elem(m, tok));
1664 }
1665
1666
1667 /* ARGSUSED */
1668 static int
1669 ctx_synopsis(MACRO_PROT_ARGS)
1670 {
1671 int nl;
1672
1673 nl = MDOC_NEWLINE & m->flags;
1674
1675 /* If we're not in the SYNOPSIS, go straight to in-line. */
1676 if ( ! (MDOC_SYNOPSIS & m->flags))
1677 return(in_line(m, tok, line, ppos, pos, buf));
1678
1679 /* If we're a nested call, same place. */
1680 if ( ! nl)
1681 return(in_line(m, tok, line, ppos, pos, buf));
1682
1683 /*
1684 * XXX: this will open a block scope; however, if later we end
1685 * up formatting the block scope, then child nodes will inherit
1686 * the formatting. Be careful.
1687 */
1688 if (MDOC_Nm == tok)
1689 return(blk_full(m, tok, line, ppos, pos, buf));
1690 assert(MDOC_Vt == tok);
1691 return(blk_part_imp(m, tok, line, ppos, pos, buf));
1692 }
1693
1694
1695 /* ARGSUSED */
1696 static int
1697 obsolete(MACRO_PROT_ARGS)
1698 {
1699
1700 mdoc_pmsg(m, line, ppos, MANDOCERR_MACROOBS);
1701 return(1);
1702 }
1703
1704
1705 /*
1706 * Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
1707 * They're unusual because they're basically free-form text until a
1708 * macro is encountered.
1709 */
1710 static int
1711 phrase(struct mdoc *m, int line, int ppos, char *buf)
1712 {
1713 int la, pos;
1714 enum margserr ac;
1715 enum mdoct ntok;
1716 char *p;
1717
1718 for (pos = ppos; ; ) {
1719 la = pos;
1720
1721 ac = mdoc_zargs(m, line, &pos, buf, &p);
1722
1723 if (ARGS_ERROR == ac)
1724 return(0);
1725 if (ARGS_EOLN == ac)
1726 break;
1727
1728 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1729
1730 if (MDOC_MAX == ntok) {
1731 if ( ! dword(m, line, la, p, DELIM_MAX))
1732 return(0);
1733 continue;
1734 }
1735
1736 if ( ! mdoc_macro(m, ntok, line, la, &pos, buf))
1737 return(0);
1738 return(append_delims(m, line, &pos, buf));
1739 }
1740
1741 return(1);
1742 }
1743
1744
1745 /* ARGSUSED */
1746 static int
1747 phrase_ta(MACRO_PROT_ARGS)
1748 {
1749 int la;
1750 enum mdoct ntok;
1751 enum margserr ac;
1752 char *p;
1753
1754 /*
1755 * FIXME: this is overly restrictive: if the `Ta' is unexpected,
1756 * it should simply error out with ARGSLOST.
1757 */
1758
1759 if ( ! rew_sub(MDOC_BODY, m, MDOC_It, line, ppos))
1760 return(0);
1761 if ( ! mdoc_body_alloc(m, line, ppos, MDOC_It))
1762 return(0);
1763
1764 for (;;) {
1765 la = *pos;
1766 ac = mdoc_zargs(m, line, pos, buf, &p);
1767
1768 if (ARGS_ERROR == ac)
1769 return(0);
1770 if (ARGS_EOLN == ac)
1771 break;
1772
1773 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1774
1775 if (MDOC_MAX == ntok) {
1776 if ( ! dword(m, line, la, p, DELIM_MAX))
1777 return(0);
1778 continue;
1779 }
1780
1781 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1782 return(0);
1783 return(append_delims(m, line, pos, buf));
1784 }
1785
1786 return(1);
1787 }