xref: /dragonfly/contrib/mdocml/mdoc_argv.c (revision e65bc1c3) 
1 /*	$Id: mdoc_argv.c,v 1.82 2012/03/23 05:50:24 kristaps Exp $ */
2 /*
3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 #ifdef HAVE_CONFIG_H
18 #include "config.h"
19 #endif
20 
21 #include <sys/types.h>
22 
23 #include <assert.h>
24 #include <stdlib.h>
25 #include <stdio.h>
26 #include <string.h>
27 
28 #include "mdoc.h"
29 #include "mandoc.h"
30 #include "libmdoc.h"
31 #include "libmandoc.h"
32 
33 #define	MULTI_STEP	 5 /* pre-allocate argument values */
34 #define	DELIMSZ	  	 6 /* max possible size of a delimiter */
35 
36 enum	argsflag {
37 	ARGSFL_NONE = 0,
38 	ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
39 	ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
40 };
41 
42 enum	argvflag {
43 	ARGV_NONE, /* no args to flag (e.g., -split) */
44 	ARGV_SINGLE, /* one arg to flag (e.g., -file xxx)  */
45 	ARGV_MULTI, /* multiple args (e.g., -column xxx yyy) */
46 	ARGV_OPT_SINGLE /* optional arg (e.g., -offset [xxx]) */
47 };
48 
49 struct	mdocarg {
50 	enum argsflag	 flags;
51 	const enum mdocargt *argvs;
52 };
53 
54 static	void		 argn_free(struct mdoc_arg *, int);
55 static	enum margserr	 args(struct mdoc *, int, int *,
56 				char *, enum argsflag, char **);
57 static	int		 args_checkpunct(const char *, int);
58 static	int		 argv_multi(struct mdoc *, int,
59 				struct mdoc_argv *, int *, char *);
60 static	int		 argv_opt_single(struct mdoc *, int,
61 				struct mdoc_argv *, int *, char *);
62 static	int		 argv_single(struct mdoc *, int,
63 				struct mdoc_argv *, int *, char *);
64 
65 static	const enum argvflag argvflags[MDOC_ARG_MAX] = {
66 	ARGV_NONE,	/* MDOC_Split */
67 	ARGV_NONE,	/* MDOC_Nosplit */
68 	ARGV_NONE,	/* MDOC_Ragged */
69 	ARGV_NONE,	/* MDOC_Unfilled */
70 	ARGV_NONE,	/* MDOC_Literal */
71 	ARGV_SINGLE,	/* MDOC_File */
72 	ARGV_OPT_SINGLE, /* MDOC_Offset */
73 	ARGV_NONE,	/* MDOC_Bullet */
74 	ARGV_NONE,	/* MDOC_Dash */
75 	ARGV_NONE,	/* MDOC_Hyphen */
76 	ARGV_NONE,	/* MDOC_Item */
77 	ARGV_NONE,	/* MDOC_Enum */
78 	ARGV_NONE,	/* MDOC_Tag */
79 	ARGV_NONE,	/* MDOC_Diag */
80 	ARGV_NONE,	/* MDOC_Hang */
81 	ARGV_NONE,	/* MDOC_Ohang */
82 	ARGV_NONE,	/* MDOC_Inset */
83 	ARGV_MULTI,	/* MDOC_Column */
84 	ARGV_OPT_SINGLE, /* MDOC_Width */
85 	ARGV_NONE,	/* MDOC_Compact */
86 	ARGV_NONE,	/* MDOC_Std */
87 	ARGV_NONE,	/* MDOC_Filled */
88 	ARGV_NONE,	/* MDOC_Words */
89 	ARGV_NONE,	/* MDOC_Emphasis */
90 	ARGV_NONE,	/* MDOC_Symbolic */
91 	ARGV_NONE	/* MDOC_Symbolic */
92 };
93 
94 static	const enum mdocargt args_Ex[] = {
95 	MDOC_Std,
96 	MDOC_ARG_MAX
97 };
98 
99 static	const enum mdocargt args_An[] = {
100 	MDOC_Split,
101 	MDOC_Nosplit,
102 	MDOC_ARG_MAX
103 };
104 
105 static	const enum mdocargt args_Bd[] = {
106 	MDOC_Ragged,
107 	MDOC_Unfilled,
108 	MDOC_Filled,
109 	MDOC_Literal,
110 	MDOC_File,
111 	MDOC_Offset,
112 	MDOC_Compact,
113 	MDOC_Centred,
114 	MDOC_ARG_MAX
115 };
116 
117 static	const enum mdocargt args_Bf[] = {
118 	MDOC_Emphasis,
119 	MDOC_Literal,
120 	MDOC_Symbolic,
121 	MDOC_ARG_MAX
122 };
123 
124 static	const enum mdocargt args_Bk[] = {
125 	MDOC_Words,
126 	MDOC_ARG_MAX
127 };
128 
129 static	const enum mdocargt args_Bl[] = {
130 	MDOC_Bullet,
131 	MDOC_Dash,
132 	MDOC_Hyphen,
133 	MDOC_Item,
134 	MDOC_Enum,
135 	MDOC_Tag,
136 	MDOC_Diag,
137 	MDOC_Hang,
138 	MDOC_Ohang,
139 	MDOC_Inset,
140 	MDOC_Column,
141 	MDOC_Width,
142 	MDOC_Offset,
143 	MDOC_Compact,
144 	MDOC_Nested,
145 	MDOC_ARG_MAX
146 };
147 
148 static	const struct mdocarg mdocargs[MDOC_MAX] = {
149 	{ ARGSFL_NONE, NULL }, /* Ap */
150 	{ ARGSFL_NONE, NULL }, /* Dd */
151 	{ ARGSFL_NONE, NULL }, /* Dt */
152 	{ ARGSFL_NONE, NULL }, /* Os */
153 	{ ARGSFL_NONE, NULL }, /* Sh */
154 	{ ARGSFL_NONE, NULL }, /* Ss */
155 	{ ARGSFL_NONE, NULL }, /* Pp */
156 	{ ARGSFL_DELIM, NULL }, /* D1 */
157 	{ ARGSFL_DELIM, NULL }, /* Dl */
158 	{ ARGSFL_NONE, args_Bd }, /* Bd */
159 	{ ARGSFL_NONE, NULL }, /* Ed */
160 	{ ARGSFL_NONE, args_Bl }, /* Bl */
161 	{ ARGSFL_NONE, NULL }, /* El */
162 	{ ARGSFL_NONE, NULL }, /* It */
163 	{ ARGSFL_DELIM, NULL }, /* Ad */
164 	{ ARGSFL_DELIM, args_An }, /* An */
165 	{ ARGSFL_DELIM, NULL }, /* Ar */
166 	{ ARGSFL_NONE, NULL }, /* Cd */
167 	{ ARGSFL_DELIM, NULL }, /* Cm */
168 	{ ARGSFL_DELIM, NULL }, /* Dv */
169 	{ ARGSFL_DELIM, NULL }, /* Er */
170 	{ ARGSFL_DELIM, NULL }, /* Ev */
171 	{ ARGSFL_NONE, args_Ex }, /* Ex */
172 	{ ARGSFL_DELIM, NULL }, /* Fa */
173 	{ ARGSFL_NONE, NULL }, /* Fd */
174 	{ ARGSFL_DELIM, NULL }, /* Fl */
175 	{ ARGSFL_DELIM, NULL }, /* Fn */
176 	{ ARGSFL_DELIM, NULL }, /* Ft */
177 	{ ARGSFL_DELIM, NULL }, /* Ic */
178 	{ ARGSFL_NONE, NULL }, /* In */
179 	{ ARGSFL_DELIM, NULL }, /* Li */
180 	{ ARGSFL_NONE, NULL }, /* Nd */
181 	{ ARGSFL_DELIM, NULL }, /* Nm */
182 	{ ARGSFL_DELIM, NULL }, /* Op */
183 	{ ARGSFL_NONE, NULL }, /* Ot */
184 	{ ARGSFL_DELIM, NULL }, /* Pa */
185 	{ ARGSFL_NONE, args_Ex }, /* Rv */
186 	{ ARGSFL_DELIM, NULL }, /* St */
187 	{ ARGSFL_DELIM, NULL }, /* Va */
188 	{ ARGSFL_DELIM, NULL }, /* Vt */
189 	{ ARGSFL_DELIM, NULL }, /* Xr */
190 	{ ARGSFL_NONE, NULL }, /* %A */
191 	{ ARGSFL_NONE, NULL }, /* %B */
192 	{ ARGSFL_NONE, NULL }, /* %D */
193 	{ ARGSFL_NONE, NULL }, /* %I */
194 	{ ARGSFL_NONE, NULL }, /* %J */
195 	{ ARGSFL_NONE, NULL }, /* %N */
196 	{ ARGSFL_NONE, NULL }, /* %O */
197 	{ ARGSFL_NONE, NULL }, /* %P */
198 	{ ARGSFL_NONE, NULL }, /* %R */
199 	{ ARGSFL_NONE, NULL }, /* %T */
200 	{ ARGSFL_NONE, NULL }, /* %V */
201 	{ ARGSFL_DELIM, NULL }, /* Ac */
202 	{ ARGSFL_NONE, NULL }, /* Ao */
203 	{ ARGSFL_DELIM, NULL }, /* Aq */
204 	{ ARGSFL_DELIM, NULL }, /* At */
205 	{ ARGSFL_DELIM, NULL }, /* Bc */
206 	{ ARGSFL_NONE, args_Bf }, /* Bf */
207 	{ ARGSFL_NONE, NULL }, /* Bo */
208 	{ ARGSFL_DELIM, NULL }, /* Bq */
209 	{ ARGSFL_DELIM, NULL }, /* Bsx */
210 	{ ARGSFL_DELIM, NULL }, /* Bx */
211 	{ ARGSFL_NONE, NULL }, /* Db */
212 	{ ARGSFL_DELIM, NULL }, /* Dc */
213 	{ ARGSFL_NONE, NULL }, /* Do */
214 	{ ARGSFL_DELIM, NULL }, /* Dq */
215 	{ ARGSFL_DELIM, NULL }, /* Ec */
216 	{ ARGSFL_NONE, NULL }, /* Ef */
217 	{ ARGSFL_DELIM, NULL }, /* Em */
218 	{ ARGSFL_NONE, NULL }, /* Eo */
219 	{ ARGSFL_DELIM, NULL }, /* Fx */
220 	{ ARGSFL_DELIM, NULL }, /* Ms */
221 	{ ARGSFL_DELIM, NULL }, /* No */
222 	{ ARGSFL_DELIM, NULL }, /* Ns */
223 	{ ARGSFL_DELIM, NULL }, /* Nx */
224 	{ ARGSFL_DELIM, NULL }, /* Ox */
225 	{ ARGSFL_DELIM, NULL }, /* Pc */
226 	{ ARGSFL_DELIM, NULL }, /* Pf */
227 	{ ARGSFL_NONE, NULL }, /* Po */
228 	{ ARGSFL_DELIM, NULL }, /* Pq */
229 	{ ARGSFL_DELIM, NULL }, /* Qc */
230 	{ ARGSFL_DELIM, NULL }, /* Ql */
231 	{ ARGSFL_NONE, NULL }, /* Qo */
232 	{ ARGSFL_DELIM, NULL }, /* Qq */
233 	{ ARGSFL_NONE, NULL }, /* Re */
234 	{ ARGSFL_NONE, NULL }, /* Rs */
235 	{ ARGSFL_DELIM, NULL }, /* Sc */
236 	{ ARGSFL_NONE, NULL }, /* So */
237 	{ ARGSFL_DELIM, NULL }, /* Sq */
238 	{ ARGSFL_NONE, NULL }, /* Sm */
239 	{ ARGSFL_DELIM, NULL }, /* Sx */
240 	{ ARGSFL_DELIM, NULL }, /* Sy */
241 	{ ARGSFL_DELIM, NULL }, /* Tn */
242 	{ ARGSFL_DELIM, NULL }, /* Ux */
243 	{ ARGSFL_DELIM, NULL }, /* Xc */
244 	{ ARGSFL_NONE, NULL }, /* Xo */
245 	{ ARGSFL_NONE, NULL }, /* Fo */
246 	{ ARGSFL_NONE, NULL }, /* Fc */
247 	{ ARGSFL_NONE, NULL }, /* Oo */
248 	{ ARGSFL_DELIM, NULL }, /* Oc */
249 	{ ARGSFL_NONE, args_Bk }, /* Bk */
250 	{ ARGSFL_NONE, NULL }, /* Ek */
251 	{ ARGSFL_NONE, NULL }, /* Bt */
252 	{ ARGSFL_NONE, NULL }, /* Hf */
253 	{ ARGSFL_NONE, NULL }, /* Fr */
254 	{ ARGSFL_NONE, NULL }, /* Ud */
255 	{ ARGSFL_NONE, NULL }, /* Lb */
256 	{ ARGSFL_NONE, NULL }, /* Lp */
257 	{ ARGSFL_DELIM, NULL }, /* Lk */
258 	{ ARGSFL_DELIM, NULL }, /* Mt */
259 	{ ARGSFL_DELIM, NULL }, /* Brq */
260 	{ ARGSFL_NONE, NULL }, /* Bro */
261 	{ ARGSFL_DELIM, NULL }, /* Brc */
262 	{ ARGSFL_NONE, NULL }, /* %C */
263 	{ ARGSFL_NONE, NULL }, /* Es */
264 	{ ARGSFL_NONE, NULL }, /* En */
265 	{ ARGSFL_NONE, NULL }, /* Dx */
266 	{ ARGSFL_NONE, NULL }, /* %Q */
267 	{ ARGSFL_NONE, NULL }, /* br */
268 	{ ARGSFL_NONE, NULL }, /* sp */
269 	{ ARGSFL_NONE, NULL }, /* %U */
270 	{ ARGSFL_NONE, NULL }, /* Ta */
271 };
272 
273 
274 /*
275  * Parse an argument from line text.  This comes in the form of -key
276  * [value0...], which may either have a single mandatory value, at least
277  * one mandatory value, an optional single value, or no value.
278  */
279 enum margverr
280 mdoc_argv(struct mdoc *m, int line, enum mdoct tok,
281 		struct mdoc_arg **v, int *pos, char *buf)
282 {
283 	char		 *p, sv;
284 	struct mdoc_argv tmp;
285 	struct mdoc_arg	 *arg;
286 	const enum mdocargt *ap;
287 
288 	if ('\0' == buf[*pos])
289 		return(ARGV_EOLN);
290 	else if (NULL == (ap = mdocargs[tok].argvs))
291 		return(ARGV_WORD);
292 	else if ('-' != buf[*pos])
293 		return(ARGV_WORD);
294 
295 	/* Seek to the first unescaped space. */
296 
297 	p = &buf[++(*pos)];
298 
299 	assert(*pos > 0);
300 
301 	for ( ; buf[*pos] ; (*pos)++)
302 		if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
303 			break;
304 
305 	/*
306 	 * We want to nil-terminate the word to look it up (it's easier
307 	 * that way).  But we may not have a flag, in which case we need
308 	 * to restore the line as-is.  So keep around the stray byte,
309 	 * which we'll reset upon exiting (if necessary).
310 	 */
311 
312 	if ('\0' != (sv = buf[*pos]))
313 		buf[(*pos)++] = '\0';
314 
315 	/*
316 	 * Now look up the word as a flag.  Use temporary storage that
317 	 * we'll copy into the node's flags, if necessary.
318 	 */
319 
320 	memset(&tmp, 0, sizeof(struct mdoc_argv));
321 
322 	tmp.line = line;
323 	tmp.pos = *pos;
324 	tmp.arg = MDOC_ARG_MAX;
325 
326 	while (MDOC_ARG_MAX != (tmp.arg = *ap++))
327 		if (0 == strcmp(p, mdoc_argnames[tmp.arg]))
328 			break;
329 
330 	if (MDOC_ARG_MAX == tmp.arg) {
331 		/*
332 		 * The flag was not found.
333 		 * Restore saved zeroed byte and return as a word.
334 		 */
335 		if (sv)
336 			buf[*pos - 1] = sv;
337 		return(ARGV_WORD);
338 	}
339 
340 	/* Read to the next word (the argument). */
341 
342 	while (buf[*pos] && ' ' == buf[*pos])
343 		(*pos)++;
344 
345 	switch (argvflags[tmp.arg]) {
346 	case (ARGV_SINGLE):
347 		if ( ! argv_single(m, line, &tmp, pos, buf))
348 			return(ARGV_ERROR);
349 		break;
350 	case (ARGV_MULTI):
351 		if ( ! argv_multi(m, line, &tmp, pos, buf))
352 			return(ARGV_ERROR);
353 		break;
354 	case (ARGV_OPT_SINGLE):
355 		if ( ! argv_opt_single(m, line, &tmp, pos, buf))
356 			return(ARGV_ERROR);
357 		break;
358 	case (ARGV_NONE):
359 		break;
360 	}
361 
362 	if (NULL == (arg = *v))
363 		arg = *v = mandoc_calloc(1, sizeof(struct mdoc_arg));
364 
365 	arg->argc++;
366 	arg->argv = mandoc_realloc
367 		(arg->argv, arg->argc * sizeof(struct mdoc_argv));
368 
369 	memcpy(&arg->argv[(int)arg->argc - 1],
370 			&tmp, sizeof(struct mdoc_argv));
371 
372 	return(ARGV_ARG);
373 }
374 
375 void
376 mdoc_argv_free(struct mdoc_arg *p)
377 {
378 	int		 i;
379 
380 	if (NULL == p)
381 		return;
382 
383 	if (p->refcnt) {
384 		--(p->refcnt);
385 		if (p->refcnt)
386 			return;
387 	}
388 	assert(p->argc);
389 
390 	for (i = (int)p->argc - 1; i >= 0; i--)
391 		argn_free(p, i);
392 
393 	free(p->argv);
394 	free(p);
395 }
396 
397 static void
398 argn_free(struct mdoc_arg *p, int iarg)
399 {
400 	struct mdoc_argv *arg;
401 	int		  j;
402 
403 	arg = &p->argv[iarg];
404 
405 	if (arg->sz && arg->value) {
406 		for (j = (int)arg->sz - 1; j >= 0; j--)
407 			free(arg->value[j]);
408 		free(arg->value);
409 	}
410 
411 	for (--p->argc; iarg < (int)p->argc; iarg++)
412 		p->argv[iarg] = p->argv[iarg+1];
413 }
414 
415 enum margserr
416 mdoc_zargs(struct mdoc *m, int line, int *pos, char *buf, char **v)
417 {
418 
419 	return(args(m, line, pos, buf, ARGSFL_NONE, v));
420 }
421 
422 enum margserr
423 mdoc_args(struct mdoc *m, int line, int *pos,
424 		char *buf, enum mdoct tok, char **v)
425 {
426 	enum argsflag	  fl;
427 	struct mdoc_node *n;
428 
429 	fl = mdocargs[tok].flags;
430 
431 	if (MDOC_It != tok)
432 		return(args(m, line, pos, buf, fl, v));
433 
434 	/*
435 	 * We know that we're in an `It', so it's reasonable to expect
436 	 * us to be sitting in a `Bl'.  Someday this may not be the case
437 	 * (if we allow random `It's sitting out there), so provide a
438 	 * safe fall-back into the default behaviour.
439 	 */
440 
441 	for (n = m->last; n; n = n->parent)
442 		if (MDOC_Bl == n->tok)
443 			if (LIST_column == n->norm->Bl.type) {
444 				fl = ARGSFL_TABSEP;
445 				break;
446 			}
447 
448 	return(args(m, line, pos, buf, fl, v));
449 }
450 
451 static enum margserr
452 args(struct mdoc *m, int line, int *pos,
453 		char *buf, enum argsflag fl, char **v)
454 {
455 	char		*p, *pp;
456 	enum margserr	 rc;
457 
458 	if ('\0' == buf[*pos]) {
459 		if (MDOC_PPHRASE & m->flags)
460 			return(ARGS_EOLN);
461 		/*
462 		 * If we're not in a partial phrase and the flag for
463 		 * being a phrase literal is still set, the punctuation
464 		 * is unterminated.
465 		 */
466 		if (MDOC_PHRASELIT & m->flags)
467 			mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);
468 
469 		m->flags &= ~MDOC_PHRASELIT;
470 		return(ARGS_EOLN);
471 	}
472 
473 	*v = &buf[*pos];
474 
475 	if (ARGSFL_DELIM == fl)
476 		if (args_checkpunct(buf, *pos))
477 			return(ARGS_PUNCT);
478 
479 	/*
480 	 * First handle TABSEP items, restricted to `Bl -column'.  This
481 	 * ignores conventional token parsing and instead uses tabs or
482 	 * `Ta' macros to separate phrases.  Phrases are parsed again
483 	 * for arguments at a later phase.
484 	 */
485 
486 	if (ARGSFL_TABSEP == fl) {
487 		/* Scan ahead to tab (can't be escaped). */
488 		p = strchr(*v, '\t');
489 		pp = NULL;
490 
491 		/* Scan ahead to unescaped `Ta'. */
492 		if ( ! (MDOC_PHRASELIT & m->flags))
493 			for (pp = *v; ; pp++) {
494 				if (NULL == (pp = strstr(pp, "Ta")))
495 					break;
496 				if (pp > *v && ' ' != *(pp - 1))
497 					continue;
498 				if (' ' == *(pp + 2) || '\0' == *(pp + 2))
499 					break;
500 			}
501 
502 		/* By default, assume a phrase. */
503 		rc = ARGS_PHRASE;
504 
505 		/*
506 		 * Adjust new-buffer position to be beyond delimiter
507 		 * mark (e.g., Ta -> end + 2).
508 		 */
509 		if (p && pp) {
510 			*pos += pp < p ? 2 : 1;
511 			rc = pp < p ? ARGS_PHRASE : ARGS_PPHRASE;
512 			p = pp < p ? pp : p;
513 		} else if (p && ! pp) {
514 			rc = ARGS_PPHRASE;
515 			*pos += 1;
516 		} else if (pp && ! p) {
517 			p = pp;
518 			*pos += 2;
519 		} else {
520 			rc = ARGS_PEND;
521 			p = strchr(*v, 0);
522 		}
523 
524 		/* Whitespace check for eoln case... */
525 		if ('\0' == *p && ' ' == *(p - 1))
526 			mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);
527 
528 		*pos += (int)(p - *v);
529 
530 		/* Strip delimiter's preceding whitespace. */
531 		pp = p - 1;
532 		while (pp > *v && ' ' == *pp) {
533 			if (pp > *v && '\\' == *(pp - 1))
534 				break;
535 			pp--;
536 		}
537 		*(pp + 1) = 0;
538 
539 		/* Strip delimiter's proceeding whitespace. */
540 		for (pp = &buf[*pos]; ' ' == *pp; pp++, (*pos)++)
541 			/* Skip ahead. */ ;
542 
543 		return(rc);
544 	}
545 
546 	/*
547 	 * Process a quoted literal.  A quote begins with a double-quote
548 	 * and ends with a double-quote NOT preceded by a double-quote.
549 	 * Whitespace is NOT involved in literal termination.
550 	 */
551 
552 	if (MDOC_PHRASELIT & m->flags || '\"' == buf[*pos]) {
553 		if ( ! (MDOC_PHRASELIT & m->flags))
554 			*v = &buf[++(*pos)];
555 
556 		if (MDOC_PPHRASE & m->flags)
557 			m->flags |= MDOC_PHRASELIT;
558 
559 		for ( ; buf[*pos]; (*pos)++) {
560 			if ('\"' != buf[*pos])
561 				continue;
562 			if ('\"' != buf[*pos + 1])
563 				break;
564 			(*pos)++;
565 		}
566 
567 		if ('\0' == buf[*pos]) {
568 			if (MDOC_PPHRASE & m->flags)
569 				return(ARGS_QWORD);
570 			mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);
571 			return(ARGS_QWORD);
572 		}
573 
574 		m->flags &= ~MDOC_PHRASELIT;
575 		buf[(*pos)++] = '\0';
576 
577 		if ('\0' == buf[*pos])
578 			return(ARGS_QWORD);
579 
580 		while (' ' == buf[*pos])
581 			(*pos)++;
582 
583 		if ('\0' == buf[*pos])
584 			mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);
585 
586 		return(ARGS_QWORD);
587 	}
588 
589 	p = &buf[*pos];
590 	*v = mandoc_getarg(m->parse, &p, line, pos);
591 
592 	return(ARGS_WORD);
593 }
594 
595 /*
596  * Check if the string consists only of space-separated closing
597  * delimiters.  This is a bit of a dance: the first must be a close
598  * delimiter, but it may be followed by middle delimiters.  Arbitrary
599  * whitespace may separate these tokens.
600  */
601 static int
602 args_checkpunct(const char *buf, int i)
603 {
604 	int		 j;
605 	char		 dbuf[DELIMSZ];
606 	enum mdelim	 d;
607 
608 	/* First token must be a close-delimiter. */
609 
610 	for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
611 		dbuf[j] = buf[i];
612 
613 	if (DELIMSZ == j)
614 		return(0);
615 
616 	dbuf[j] = '\0';
617 	if (DELIM_CLOSE != mdoc_isdelim(dbuf))
618 		return(0);
619 
620 	while (' ' == buf[i])
621 		i++;
622 
623 	/* Remaining must NOT be open/none. */
624 
625 	while (buf[i]) {
626 		j = 0;
627 		while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
628 			dbuf[j++] = buf[i++];
629 
630 		if (DELIMSZ == j)
631 			return(0);
632 
633 		dbuf[j] = '\0';
634 		d = mdoc_isdelim(dbuf);
635 		if (DELIM_NONE == d || DELIM_OPEN == d)
636 			return(0);
637 
638 		while (' ' == buf[i])
639 			i++;
640 	}
641 
642 	return('\0' == buf[i]);
643 }
644 
645 static int
646 argv_multi(struct mdoc *m, int line,
647 		struct mdoc_argv *v, int *pos, char *buf)
648 {
649 	enum margserr	 ac;
650 	char		*p;
651 
652 	for (v->sz = 0; ; v->sz++) {
653 		if ('-' == buf[*pos])
654 			break;
655 		ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
656 		if (ARGS_ERROR == ac)
657 			return(0);
658 		else if (ARGS_EOLN == ac)
659 			break;
660 
661 		if (0 == v->sz % MULTI_STEP)
662 			v->value = mandoc_realloc(v->value,
663 				(v->sz + MULTI_STEP) * sizeof(char *));
664 
665 		v->value[(int)v->sz] = mandoc_strdup(p);
666 	}
667 
668 	return(1);
669 }
670 
671 static int
672 argv_opt_single(struct mdoc *m, int line,
673 		struct mdoc_argv *v, int *pos, char *buf)
674 {
675 	enum margserr	 ac;
676 	char		*p;
677 
678 	if ('-' == buf[*pos])
679 		return(1);
680 
681 	ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
682 	if (ARGS_ERROR == ac)
683 		return(0);
684 	if (ARGS_EOLN == ac)
685 		return(1);
686 
687 	v->sz = 1;
688 	v->value = mandoc_malloc(sizeof(char *));
689 	v->value[0] = mandoc_strdup(p);
690 
691 	return(1);
692 }
693 
694 static int
695 argv_single(struct mdoc *m, int line,
696 		struct mdoc_argv *v, int *pos, char *buf)
697 {
698 	int		 ppos;
699 	enum margserr	 ac;
700 	char		*p;
701 
702 	ppos = *pos;
703 
704 	ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
705 	if (ARGS_EOLN == ac) {
706 		mdoc_pmsg(m, line, ppos, MANDOCERR_SYNTARGVCOUNT);
707 		return(0);
708 	} else if (ARGS_ERROR == ac)
709 		return(0);
710 
711 	v->sz = 1;
712 	v->value = mandoc_malloc(sizeof(char *));
713 	v->value[0] = mandoc_strdup(p);
714 
715 	return(1);
716 }
717