1/*	$Id: mdoc_argv.c,v 1.115 2017/05/30 16:22:03 schwarze Exp $ */
2/*
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2012, 2014-2017 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 AUTHORS DISCLAIM ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18#include "config.h"
19
20#include <sys/types.h>
21
22#include <assert.h>
23#include <stdlib.h>
24#include <stdio.h>
25#include <string.h>
26
27#include "mandoc_aux.h"
28#include "mandoc.h"
29#include "roff.h"
30#include "mdoc.h"
31#include "libmandoc.h"
32#include "roff_int.h"
33#include "libmdoc.h"
34
35#define	MULTI_STEP	 5 /* pre-allocate argument values */
36#define	DELIMSZ		 6 /* max possible size of a delimiter */
37
38enum	argsflag {
39	ARGSFL_NONE = 0,
40	ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
41	ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
42};
43
44enum	argvflag {
45	ARGV_NONE, /* no args to flag (e.g., -split) */
46	ARGV_SINGLE, /* one arg to flag (e.g., -file xxx)  */
47	ARGV_MULTI /* multiple args (e.g., -column xxx yyy) */
48};
49
50struct	mdocarg {
51	enum argsflag	 flags;
52	const enum mdocargt *argvs;
53};
54
55static	void		 argn_free(struct mdoc_arg *, int);
56static	enum margserr	 args(struct roff_man *, int, int *,
57				char *, enum argsflag, char **);
58static	int		 args_checkpunct(const char *, int);
59static	void		 argv_multi(struct roff_man *, int,
60				struct mdoc_argv *, int *, char *);
61static	void		 argv_single(struct roff_man *, int,
62				struct mdoc_argv *, int *, char *);
63
64static	const enum argvflag argvflags[MDOC_ARG_MAX] = {
65	ARGV_NONE,	/* MDOC_Split */
66	ARGV_NONE,	/* MDOC_Nosplit */
67	ARGV_NONE,	/* MDOC_Ragged */
68	ARGV_NONE,	/* MDOC_Unfilled */
69	ARGV_NONE,	/* MDOC_Literal */
70	ARGV_SINGLE,	/* MDOC_File */
71	ARGV_SINGLE,	/* MDOC_Offset */
72	ARGV_NONE,	/* MDOC_Bullet */
73	ARGV_NONE,	/* MDOC_Dash */
74	ARGV_NONE,	/* MDOC_Hyphen */
75	ARGV_NONE,	/* MDOC_Item */
76	ARGV_NONE,	/* MDOC_Enum */
77	ARGV_NONE,	/* MDOC_Tag */
78	ARGV_NONE,	/* MDOC_Diag */
79	ARGV_NONE,	/* MDOC_Hang */
80	ARGV_NONE,	/* MDOC_Ohang */
81	ARGV_NONE,	/* MDOC_Inset */
82	ARGV_MULTI,	/* MDOC_Column */
83	ARGV_SINGLE,	/* MDOC_Width */
84	ARGV_NONE,	/* MDOC_Compact */
85	ARGV_NONE,	/* MDOC_Std */
86	ARGV_NONE,	/* MDOC_Filled */
87	ARGV_NONE,	/* MDOC_Words */
88	ARGV_NONE,	/* MDOC_Emphasis */
89	ARGV_NONE,	/* MDOC_Symbolic */
90	ARGV_NONE	/* MDOC_Symbolic */
91};
92
93static	const enum mdocargt args_Ex[] = {
94	MDOC_Std,
95	MDOC_ARG_MAX
96};
97
98static	const enum mdocargt args_An[] = {
99	MDOC_Split,
100	MDOC_Nosplit,
101	MDOC_ARG_MAX
102};
103
104static	const enum mdocargt args_Bd[] = {
105	MDOC_Ragged,
106	MDOC_Unfilled,
107	MDOC_Filled,
108	MDOC_Literal,
109	MDOC_File,
110	MDOC_Offset,
111	MDOC_Compact,
112	MDOC_Centred,
113	MDOC_ARG_MAX
114};
115
116static	const enum mdocargt args_Bf[] = {
117	MDOC_Emphasis,
118	MDOC_Literal,
119	MDOC_Symbolic,
120	MDOC_ARG_MAX
121};
122
123static	const enum mdocargt args_Bk[] = {
124	MDOC_Words,
125	MDOC_ARG_MAX
126};
127
128static	const enum mdocargt args_Bl[] = {
129	MDOC_Bullet,
130	MDOC_Dash,
131	MDOC_Hyphen,
132	MDOC_Item,
133	MDOC_Enum,
134	MDOC_Tag,
135	MDOC_Diag,
136	MDOC_Hang,
137	MDOC_Ohang,
138	MDOC_Inset,
139	MDOC_Column,
140	MDOC_Width,
141	MDOC_Offset,
142	MDOC_Compact,
143	MDOC_Nested,
144	MDOC_ARG_MAX
145};
146
147static	const struct mdocarg __mdocargs[MDOC_MAX - MDOC_Dd] = {
148	{ ARGSFL_NONE, NULL }, /* Dd */
149	{ ARGSFL_NONE, NULL }, /* Dt */
150	{ ARGSFL_NONE, NULL }, /* Os */
151	{ ARGSFL_NONE, NULL }, /* Sh */
152	{ ARGSFL_NONE, NULL }, /* Ss */
153	{ ARGSFL_NONE, NULL }, /* Pp */
154	{ ARGSFL_DELIM, NULL }, /* D1 */
155	{ ARGSFL_DELIM, NULL }, /* Dl */
156	{ ARGSFL_NONE, args_Bd }, /* Bd */
157	{ ARGSFL_NONE, NULL }, /* Ed */
158	{ ARGSFL_NONE, args_Bl }, /* Bl */
159	{ ARGSFL_NONE, NULL }, /* El */
160	{ ARGSFL_NONE, NULL }, /* It */
161	{ ARGSFL_DELIM, NULL }, /* Ad */
162	{ ARGSFL_DELIM, args_An }, /* An */
163	{ ARGSFL_DELIM, NULL }, /* Ap */
164	{ ARGSFL_DELIM, NULL }, /* Ar */
165	{ ARGSFL_DELIM, NULL }, /* Cd */
166	{ ARGSFL_DELIM, NULL }, /* Cm */
167	{ ARGSFL_DELIM, NULL }, /* Dv */
168	{ ARGSFL_DELIM, NULL }, /* Er */
169	{ ARGSFL_DELIM, NULL }, /* Ev */
170	{ ARGSFL_NONE, args_Ex }, /* Ex */
171	{ ARGSFL_DELIM, NULL }, /* Fa */
172	{ ARGSFL_NONE, NULL }, /* Fd */
173	{ ARGSFL_DELIM, NULL }, /* Fl */
174	{ ARGSFL_DELIM, NULL }, /* Fn */
175	{ ARGSFL_DELIM, NULL }, /* Ft */
176	{ ARGSFL_DELIM, NULL }, /* Ic */
177	{ ARGSFL_DELIM, NULL }, /* In */
178	{ ARGSFL_DELIM, NULL }, /* Li */
179	{ ARGSFL_NONE, NULL }, /* Nd */
180	{ ARGSFL_DELIM, NULL }, /* Nm */
181	{ ARGSFL_DELIM, NULL }, /* Op */
182	{ ARGSFL_DELIM, NULL }, /* Ot */
183	{ ARGSFL_DELIM, NULL }, /* Pa */
184	{ ARGSFL_NONE, args_Ex }, /* Rv */
185	{ ARGSFL_DELIM, NULL }, /* St */
186	{ ARGSFL_DELIM, NULL }, /* Va */
187	{ ARGSFL_DELIM, NULL }, /* Vt */
188	{ ARGSFL_DELIM, NULL }, /* Xr */
189	{ ARGSFL_NONE, NULL }, /* %A */
190	{ ARGSFL_NONE, NULL }, /* %B */
191	{ ARGSFL_NONE, NULL }, /* %D */
192	{ ARGSFL_NONE, NULL }, /* %I */
193	{ ARGSFL_NONE, NULL }, /* %J */
194	{ ARGSFL_NONE, NULL }, /* %N */
195	{ ARGSFL_NONE, NULL }, /* %O */
196	{ ARGSFL_NONE, NULL }, /* %P */
197	{ ARGSFL_NONE, NULL }, /* %R */
198	{ ARGSFL_NONE, NULL }, /* %T */
199	{ ARGSFL_NONE, NULL }, /* %V */
200	{ ARGSFL_DELIM, NULL }, /* Ac */
201	{ ARGSFL_NONE, NULL }, /* Ao */
202	{ ARGSFL_DELIM, NULL }, /* Aq */
203	{ ARGSFL_DELIM, NULL }, /* At */
204	{ ARGSFL_DELIM, NULL }, /* Bc */
205	{ ARGSFL_NONE, args_Bf }, /* Bf */
206	{ ARGSFL_NONE, NULL }, /* Bo */
207	{ ARGSFL_DELIM, NULL }, /* Bq */
208	{ ARGSFL_DELIM, NULL }, /* Bsx */
209	{ ARGSFL_DELIM, NULL }, /* Bx */
210	{ ARGSFL_NONE, NULL }, /* Db */
211	{ ARGSFL_DELIM, NULL }, /* Dc */
212	{ ARGSFL_NONE, NULL }, /* Do */
213	{ ARGSFL_DELIM, NULL }, /* Dq */
214	{ ARGSFL_DELIM, NULL }, /* Ec */
215	{ ARGSFL_NONE, NULL }, /* Ef */
216	{ ARGSFL_DELIM, NULL }, /* Em */
217	{ ARGSFL_NONE, NULL }, /* Eo */
218	{ ARGSFL_DELIM, NULL }, /* Fx */
219	{ ARGSFL_DELIM, NULL }, /* Ms */
220	{ ARGSFL_DELIM, NULL }, /* No */
221	{ ARGSFL_DELIM, NULL }, /* Ns */
222	{ ARGSFL_DELIM, NULL }, /* Nx */
223	{ ARGSFL_DELIM, NULL }, /* Ox */
224	{ ARGSFL_DELIM, NULL }, /* Pc */
225	{ ARGSFL_DELIM, NULL }, /* Pf */
226	{ ARGSFL_NONE, NULL }, /* Po */
227	{ ARGSFL_DELIM, NULL }, /* Pq */
228	{ ARGSFL_DELIM, NULL }, /* Qc */
229	{ ARGSFL_DELIM, NULL }, /* Ql */
230	{ ARGSFL_NONE, NULL }, /* Qo */
231	{ ARGSFL_DELIM, NULL }, /* Qq */
232	{ ARGSFL_NONE, NULL }, /* Re */
233	{ ARGSFL_NONE, NULL }, /* Rs */
234	{ ARGSFL_DELIM, NULL }, /* Sc */
235	{ ARGSFL_NONE, NULL }, /* So */
236	{ ARGSFL_DELIM, NULL }, /* Sq */
237	{ ARGSFL_NONE, NULL }, /* Sm */
238	{ ARGSFL_DELIM, NULL }, /* Sx */
239	{ ARGSFL_DELIM, NULL }, /* Sy */
240	{ ARGSFL_DELIM, NULL }, /* Tn */
241	{ ARGSFL_DELIM, NULL }, /* Ux */
242	{ ARGSFL_DELIM, NULL }, /* Xc */
243	{ ARGSFL_NONE, NULL }, /* Xo */
244	{ ARGSFL_NONE, NULL }, /* Fo */
245	{ ARGSFL_DELIM, NULL }, /* Fc */
246	{ ARGSFL_NONE, NULL }, /* Oo */
247	{ ARGSFL_DELIM, NULL }, /* Oc */
248	{ ARGSFL_NONE, args_Bk }, /* Bk */
249	{ ARGSFL_NONE, NULL }, /* Ek */
250	{ ARGSFL_NONE, NULL }, /* Bt */
251	{ ARGSFL_NONE, NULL }, /* Hf */
252	{ ARGSFL_DELIM, NULL }, /* Fr */
253	{ ARGSFL_NONE, NULL }, /* Ud */
254	{ ARGSFL_DELIM, NULL }, /* Lb */
255	{ ARGSFL_NONE, NULL }, /* Lp */
256	{ ARGSFL_DELIM, NULL }, /* Lk */
257	{ ARGSFL_DELIM, NULL }, /* Mt */
258	{ ARGSFL_DELIM, NULL }, /* Brq */
259	{ ARGSFL_NONE, NULL }, /* Bro */
260	{ ARGSFL_DELIM, NULL }, /* Brc */
261	{ ARGSFL_NONE, NULL }, /* %C */
262	{ ARGSFL_NONE, NULL }, /* Es */
263	{ ARGSFL_DELIM, NULL }, /* En */
264	{ ARGSFL_DELIM, NULL }, /* Dx */
265	{ ARGSFL_NONE, NULL }, /* %Q */
266	{ ARGSFL_NONE, NULL }, /* %U */
267	{ ARGSFL_NONE, NULL }, /* Ta */
268};
269static	const struct mdocarg *const mdocargs = __mdocargs - MDOC_Dd;
270
271
272/*
273 * Parse flags and their arguments from the input line.
274 * These come in the form -flag [argument ...].
275 * Some flags take no argument, some one, some multiple.
276 */
277void
278mdoc_argv(struct roff_man *mdoc, int line, enum roff_tok tok,
279	struct mdoc_arg **reta, int *pos, char *buf)
280{
281	struct mdoc_argv	  tmpv;
282	struct mdoc_argv	**retv;
283	const enum mdocargt	 *argtable;
284	char			 *argname;
285	int			  ipos, retc;
286	char			  savechar;
287
288	*reta = NULL;
289
290	/* Which flags does this macro support? */
291
292	assert(tok >= MDOC_Dd && tok < MDOC_MAX);
293	argtable = mdocargs[tok].argvs;
294	if (argtable == NULL)
295		return;
296
297	/* Loop over the flags on the input line. */
298
299	ipos = *pos;
300	while (buf[ipos] == '-') {
301
302		/* Seek to the first unescaped space. */
303
304		for (argname = buf + ++ipos; buf[ipos] != '\0'; ipos++)
305			if (buf[ipos] == ' ' && buf[ipos - 1] != '\\')
306				break;
307
308		/*
309		 * We want to nil-terminate the word to look it up.
310		 * But we may not have a flag, in which case we need
311		 * to restore the line as-is.  So keep around the
312		 * stray byte, which we'll reset upon exiting.
313		 */
314
315		if ((savechar = buf[ipos]) != '\0')
316			buf[ipos++] = '\0';
317
318		/*
319		 * Now look up the word as a flag.  Use temporary
320		 * storage that we'll copy into the node's flags.
321		 */
322
323		while ((tmpv.arg = *argtable++) != MDOC_ARG_MAX)
324			if ( ! strcmp(argname, mdoc_argnames[tmpv.arg]))
325				break;
326
327		/* If it isn't a flag, restore the saved byte. */
328
329		if (tmpv.arg == MDOC_ARG_MAX) {
330			if (savechar != '\0')
331				buf[ipos - 1] = savechar;
332			break;
333		}
334
335		/* Read to the next word (the first argument). */
336
337		while (buf[ipos] == ' ')
338			ipos++;
339
340		/* Parse the arguments of the flag. */
341
342		tmpv.line  = line;
343		tmpv.pos   = *pos;
344		tmpv.sz    = 0;
345		tmpv.value = NULL;
346
347		switch (argvflags[tmpv.arg]) {
348		case ARGV_SINGLE:
349			argv_single(mdoc, line, &tmpv, &ipos, buf);
350			break;
351		case ARGV_MULTI:
352			argv_multi(mdoc, line, &tmpv, &ipos, buf);
353			break;
354		case ARGV_NONE:
355			break;
356		}
357
358		/* Append to the return values. */
359
360		if (*reta == NULL)
361			*reta = mandoc_calloc(1, sizeof(**reta));
362
363		retc = ++(*reta)->argc;
364		retv = &(*reta)->argv;
365		*retv = mandoc_reallocarray(*retv, retc, sizeof(**retv));
366		memcpy(*retv + retc - 1, &tmpv, sizeof(**retv));
367
368		/* Prepare for parsing the next flag. */
369
370		*pos = ipos;
371		argtable = mdocargs[tok].argvs;
372	}
373}
374
375void
376mdoc_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
397static void
398argn_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
415enum margserr
416mdoc_args(struct roff_man *mdoc, int line, int *pos,
417	char *buf, enum roff_tok tok, char **v)
418{
419	struct roff_node *n;
420	char		 *v_local;
421	enum argsflag	  fl;
422
423	if (v == NULL)
424		v = &v_local;
425	fl = tok == TOKEN_NONE ? ARGSFL_NONE : mdocargs[tok].flags;
426
427	/*
428	 * We know that we're in an `It', so it's reasonable to expect
429	 * us to be sitting in a `Bl'.  Someday this may not be the case
430	 * (if we allow random `It's sitting out there), so provide a
431	 * safe fall-back into the default behaviour.
432	 */
433
434	if (tok == MDOC_It) {
435		for (n = mdoc->last; n != NULL; n = n->parent) {
436			if (n->tok != MDOC_Bl)
437				continue;
438			if (n->norm->Bl.type == LIST_column)
439				fl = ARGSFL_TABSEP;
440			break;
441		}
442	}
443
444	return args(mdoc, line, pos, buf, fl, v);
445}
446
447static enum margserr
448args(struct roff_man *mdoc, int line, int *pos,
449		char *buf, enum argsflag fl, char **v)
450{
451	char		*p;
452	int		 pairs;
453
454	if (buf[*pos] == '\0') {
455		if (mdoc->flags & MDOC_PHRASELIT &&
456		    ! (mdoc->flags & MDOC_PHRASE)) {
457			mandoc_msg(MANDOCERR_ARG_QUOTE,
458			    mdoc->parse, line, *pos, NULL);
459			mdoc->flags &= ~MDOC_PHRASELIT;
460		}
461		return ARGS_EOLN;
462	}
463
464	*v = buf + *pos;
465
466	if (fl == ARGSFL_DELIM && args_checkpunct(buf, *pos))
467		return ARGS_PUNCT;
468
469	/*
470	 * Tabs in `It' lines in `Bl -column' can't be escaped.
471	 * Phrases are reparsed for `Ta' and other macros later.
472	 */
473
474	if (fl == ARGSFL_TABSEP) {
475		if ((p = strchr(*v, '\t')) != NULL) {
476
477			/*
478			 * Words right before and right after
479			 * tab characters are not parsed,
480			 * unless there is a blank in between.
481			 */
482
483			if (p > buf && p[-1] != ' ')
484				mdoc->flags |= MDOC_PHRASEQL;
485			if (p[1] != ' ')
486				mdoc->flags |= MDOC_PHRASEQN;
487
488			/*
489			 * One or more blanks after a tab cause
490			 * one leading blank in the next column.
491			 * So skip all but one of them.
492			 */
493
494			*pos += (int)(p - *v) + 1;
495			while (buf[*pos] == ' ' && buf[*pos + 1] == ' ')
496				(*pos)++;
497
498			/*
499			 * A tab at the end of an input line
500			 * switches to the next column.
501			 */
502
503			if (buf[*pos] == '\0' || buf[*pos + 1] == '\0')
504				mdoc->flags |= MDOC_PHRASEQN;
505		} else {
506			p = strchr(*v, '\0');
507			if (p[-1] == ' ')
508				mandoc_msg(MANDOCERR_SPACE_EOL,
509				    mdoc->parse, line, *pos, NULL);
510			*pos += (int)(p - *v);
511		}
512
513		/* Skip any trailing blank characters. */
514		while (p > *v && p[-1] == ' ' &&
515		    (p - 1 == *v || p[-2] != '\\'))
516			p--;
517		*p = '\0';
518
519		return ARGS_PHRASE;
520	}
521
522	/*
523	 * Process a quoted literal.  A quote begins with a double-quote
524	 * and ends with a double-quote NOT preceded by a double-quote.
525	 * NUL-terminate the literal in place.
526	 * Collapse pairs of quotes inside quoted literals.
527	 * Whitespace is NOT involved in literal termination.
528	 */
529
530	if (mdoc->flags & MDOC_PHRASELIT || buf[*pos] == '\"') {
531		if ( ! (mdoc->flags & MDOC_PHRASELIT))
532			*v = &buf[++(*pos)];
533
534		if (mdoc->flags & MDOC_PHRASE)
535			mdoc->flags |= MDOC_PHRASELIT;
536
537		pairs = 0;
538		for ( ; buf[*pos]; (*pos)++) {
539			/* Move following text left after quoted quotes. */
540			if (pairs)
541				buf[*pos - pairs] = buf[*pos];
542			if ('\"' != buf[*pos])
543				continue;
544			/* Unquoted quotes end quoted args. */
545			if ('\"' != buf[*pos + 1])
546				break;
547			/* Quoted quotes collapse. */
548			pairs++;
549			(*pos)++;
550		}
551		if (pairs)
552			buf[*pos - pairs] = '\0';
553
554		if (buf[*pos] == '\0') {
555			if ( ! (mdoc->flags & MDOC_PHRASE))
556				mandoc_msg(MANDOCERR_ARG_QUOTE,
557				    mdoc->parse, line, *pos, NULL);
558			return ARGS_WORD;
559		}
560
561		mdoc->flags &= ~MDOC_PHRASELIT;
562		buf[(*pos)++] = '\0';
563
564		if ('\0' == buf[*pos])
565			return ARGS_WORD;
566
567		while (' ' == buf[*pos])
568			(*pos)++;
569
570		if ('\0' == buf[*pos])
571			mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
572			    line, *pos, NULL);
573
574		return ARGS_WORD;
575	}
576
577	p = &buf[*pos];
578	*v = mandoc_getarg(mdoc->parse, &p, line, pos);
579
580	/*
581	 * After parsing the last word in this phrase,
582	 * tell lookup() whether or not to interpret it.
583	 */
584
585	if (*p == '\0' && mdoc->flags & MDOC_PHRASEQL) {
586		mdoc->flags &= ~MDOC_PHRASEQL;
587		mdoc->flags |= MDOC_PHRASEQF;
588	}
589	return ARGS_WORD;
590}
591
592/*
593 * Check if the string consists only of space-separated closing
594 * delimiters.  This is a bit of a dance: the first must be a close
595 * delimiter, but it may be followed by middle delimiters.  Arbitrary
596 * whitespace may separate these tokens.
597 */
598static int
599args_checkpunct(const char *buf, int i)
600{
601	int		 j;
602	char		 dbuf[DELIMSZ];
603	enum mdelim	 d;
604
605	/* First token must be a close-delimiter. */
606
607	for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
608		dbuf[j] = buf[i];
609
610	if (DELIMSZ == j)
611		return 0;
612
613	dbuf[j] = '\0';
614	if (DELIM_CLOSE != mdoc_isdelim(dbuf))
615		return 0;
616
617	while (' ' == buf[i])
618		i++;
619
620	/* Remaining must NOT be open/none. */
621
622	while (buf[i]) {
623		j = 0;
624		while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
625			dbuf[j++] = buf[i++];
626
627		if (DELIMSZ == j)
628			return 0;
629
630		dbuf[j] = '\0';
631		d = mdoc_isdelim(dbuf);
632		if (DELIM_NONE == d || DELIM_OPEN == d)
633			return 0;
634
635		while (' ' == buf[i])
636			i++;
637	}
638
639	return '\0' == buf[i];
640}
641
642static void
643argv_multi(struct roff_man *mdoc, int line,
644		struct mdoc_argv *v, int *pos, char *buf)
645{
646	enum margserr	 ac;
647	char		*p;
648
649	for (v->sz = 0; ; v->sz++) {
650		if (buf[*pos] == '-')
651			break;
652		ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
653		if (ac == ARGS_EOLN)
654			break;
655
656		if (v->sz % MULTI_STEP == 0)
657			v->value = mandoc_reallocarray(v->value,
658			    v->sz + MULTI_STEP, sizeof(char *));
659
660		v->value[(int)v->sz] = mandoc_strdup(p);
661	}
662}
663
664static void
665argv_single(struct roff_man *mdoc, int line,
666		struct mdoc_argv *v, int *pos, char *buf)
667{
668	enum margserr	 ac;
669	char		*p;
670
671	ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
672	if (ac == ARGS_EOLN)
673		return;
674
675	v->sz = 1;
676	v->value = mandoc_malloc(sizeof(char *));
677	v->value[0] = mandoc_strdup(p);
678}
679