1/*	$Id: mdoc_argv.c,v 1.120 2019/07/11 17:06:17 schwarze Exp $ */
2/*
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2012, 2014-2019 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};
269
270
271/*
272 * Parse flags and their arguments from the input line.
273 * These come in the form -flag [argument ...].
274 * Some flags take no argument, some one, some multiple.
275 */
276void
277mdoc_argv(struct roff_man *mdoc, int line, enum roff_tok tok,
278	struct mdoc_arg **reta, int *pos, char *buf)
279{
280	struct mdoc_argv	  tmpv;
281	struct mdoc_argv	**retv;
282	const enum mdocargt	 *argtable;
283	char			 *argname;
284	int			  ipos, retc;
285	char			  savechar;
286
287	*reta = NULL;
288
289	/* Which flags does this macro support? */
290
291	assert(tok >= MDOC_Dd && tok < MDOC_MAX);
292	argtable = mdocargs[tok - MDOC_Dd].argvs;
293	if (argtable == NULL)
294		return;
295
296	/* Loop over the flags on the input line. */
297
298	ipos = *pos;
299	while (buf[ipos] == '-') {
300
301		/* Seek to the first unescaped space. */
302
303		for (argname = buf + ++ipos; buf[ipos] != '\0'; ipos++)
304			if (buf[ipos] == ' ' && buf[ipos - 1] != '\\')
305				break;
306
307		/*
308		 * We want to nil-terminate the word to look it up.
309		 * But we may not have a flag, in which case we need
310		 * to restore the line as-is.  So keep around the
311		 * stray byte, which we'll reset upon exiting.
312		 */
313
314		if ((savechar = buf[ipos]) != '\0')
315			buf[ipos++] = '\0';
316
317		/*
318		 * Now look up the word as a flag.  Use temporary
319		 * storage that we'll copy into the node's flags.
320		 */
321
322		while ((tmpv.arg = *argtable++) != MDOC_ARG_MAX)
323			if ( ! strcmp(argname, mdoc_argnames[tmpv.arg]))
324				break;
325
326		/* If it isn't a flag, restore the saved byte. */
327
328		if (tmpv.arg == MDOC_ARG_MAX) {
329			if (savechar != '\0')
330				buf[ipos - 1] = savechar;
331			break;
332		}
333
334		/* Read to the next word (the first argument). */
335
336		while (buf[ipos] == ' ')
337			ipos++;
338
339		/* Parse the arguments of the flag. */
340
341		tmpv.line  = line;
342		tmpv.pos   = *pos;
343		tmpv.sz    = 0;
344		tmpv.value = NULL;
345
346		switch (argvflags[tmpv.arg]) {
347		case ARGV_SINGLE:
348			argv_single(mdoc, line, &tmpv, &ipos, buf);
349			break;
350		case ARGV_MULTI:
351			argv_multi(mdoc, line, &tmpv, &ipos, buf);
352			break;
353		case ARGV_NONE:
354			break;
355		}
356
357		/* Append to the return values. */
358
359		if (*reta == NULL)
360			*reta = mandoc_calloc(1, sizeof(**reta));
361
362		retc = ++(*reta)->argc;
363		retv = &(*reta)->argv;
364		*retv = mandoc_reallocarray(*retv, retc, sizeof(**retv));
365		memcpy(*retv + retc - 1, &tmpv, sizeof(**retv));
366
367		/* Prepare for parsing the next flag. */
368
369		*pos = ipos;
370		argtable = mdocargs[tok - MDOC_Dd].argvs;
371	}
372}
373
374void
375mdoc_argv_free(struct mdoc_arg *p)
376{
377	int		 i;
378
379	if (NULL == p)
380		return;
381
382	if (p->refcnt) {
383		--(p->refcnt);
384		if (p->refcnt)
385			return;
386	}
387	assert(p->argc);
388
389	for (i = (int)p->argc - 1; i >= 0; i--)
390		argn_free(p, i);
391
392	free(p->argv);
393	free(p);
394}
395
396static void
397argn_free(struct mdoc_arg *p, int iarg)
398{
399	struct mdoc_argv *arg;
400	int		  j;
401
402	arg = &p->argv[iarg];
403
404	if (arg->sz && arg->value) {
405		for (j = (int)arg->sz - 1; j >= 0; j--)
406			free(arg->value[j]);
407		free(arg->value);
408	}
409
410	for (--p->argc; iarg < (int)p->argc; iarg++)
411		p->argv[iarg] = p->argv[iarg+1];
412}
413
414enum margserr
415mdoc_args(struct roff_man *mdoc, int line, int *pos,
416	char *buf, enum roff_tok tok, char **v)
417{
418	struct roff_node *n;
419	enum argsflag	  fl;
420
421	fl = tok == TOKEN_NONE ? ARGSFL_NONE : mdocargs[tok - MDOC_Dd].flags;
422
423	/*
424	 * We know that we're in an `It', so it's reasonable to expect
425	 * us to be sitting in a `Bl'.  Someday this may not be the case
426	 * (if we allow random `It's sitting out there), so provide a
427	 * safe fall-back into the default behaviour.
428	 */
429
430	if (tok == MDOC_It) {
431		for (n = mdoc->last; n != NULL; n = n->parent) {
432			if (n->tok != MDOC_Bl)
433				continue;
434			if (n->norm->Bl.type == LIST_column)
435				fl = ARGSFL_TABSEP;
436			break;
437		}
438	}
439
440	return args(mdoc, line, pos, buf, fl, v);
441}
442
443static enum margserr
444args(struct roff_man *mdoc, int line, int *pos,
445		char *buf, enum argsflag fl, char **v)
446{
447	char		*p;
448	char		*v_local;
449	int		 pairs;
450
451	if (buf[*pos] == '\0') {
452		if (mdoc->flags & MDOC_PHRASELIT &&
453		    ! (mdoc->flags & MDOC_PHRASE)) {
454			mandoc_msg(MANDOCERR_ARG_QUOTE, line, *pos, NULL);
455			mdoc->flags &= ~MDOC_PHRASELIT;
456		}
457		mdoc->flags &= ~MDOC_PHRASEQL;
458		return ARGS_EOLN;
459	}
460
461	if (v == NULL)
462		v = &v_local;
463	*v = buf + *pos;
464
465	if (fl == ARGSFL_DELIM && args_checkpunct(buf, *pos))
466		return ARGS_PUNCT;
467
468	/*
469	 * Tabs in `It' lines in `Bl -column' can't be escaped.
470	 * Phrases are reparsed for `Ta' and other macros later.
471	 */
472
473	if (fl == ARGSFL_TABSEP) {
474		if ((p = strchr(*v, '\t')) != NULL) {
475
476			/*
477			 * Words right before and right after
478			 * tab characters are not parsed,
479			 * unless there is a blank in between.
480			 */
481
482			if (p > buf && p[-1] != ' ')
483				mdoc->flags |= MDOC_PHRASEQL;
484			if (p[1] != ' ')
485				mdoc->flags |= MDOC_PHRASEQN;
486
487			/*
488			 * One or more blanks after a tab cause
489			 * one leading blank in the next column.
490			 * So skip all but one of them.
491			 */
492
493			*pos += (int)(p - *v) + 1;
494			while (buf[*pos] == ' ' && buf[*pos + 1] == ' ')
495				(*pos)++;
496
497			/*
498			 * A tab at the end of an input line
499			 * switches to the next column.
500			 */
501
502			if (buf[*pos] == '\0' || buf[*pos + 1] == '\0')
503				mdoc->flags |= MDOC_PHRASEQN;
504		} else {
505			p = strchr(*v, '\0');
506			if (p[-1] == ' ')
507				mandoc_msg(MANDOCERR_SPACE_EOL,
508				    line, *pos, NULL);
509			*pos += (int)(p - *v);
510		}
511
512		/* Skip any trailing blank characters. */
513		while (p > *v && p[-1] == ' ' &&
514		    (p - 1 == *v || p[-2] != '\\'))
515			p--;
516		*p = '\0';
517
518		return ARGS_PHRASE;
519	}
520
521	/*
522	 * Process a quoted literal.  A quote begins with a double-quote
523	 * and ends with a double-quote NOT preceded by a double-quote.
524	 * NUL-terminate the literal in place.
525	 * Collapse pairs of quotes inside quoted literals.
526	 * Whitespace is NOT involved in literal termination.
527	 */
528
529	if (mdoc->flags & MDOC_PHRASELIT ||
530	    (mdoc->flags & MDOC_PHRASE && buf[*pos] == '\"')) {
531		if ((mdoc->flags & MDOC_PHRASELIT) == 0) {
532			*v = &buf[++(*pos)];
533			mdoc->flags |= MDOC_PHRASELIT;
534		}
535		pairs = 0;
536		for ( ; buf[*pos]; (*pos)++) {
537			/* Move following text left after quoted quotes. */
538			if (pairs)
539				buf[*pos - pairs] = buf[*pos];
540			if ('\"' != buf[*pos])
541				continue;
542			/* Unquoted quotes end quoted args. */
543			if ('\"' != buf[*pos + 1])
544				break;
545			/* Quoted quotes collapse. */
546			pairs++;
547			(*pos)++;
548		}
549		if (pairs)
550			buf[*pos - pairs] = '\0';
551
552		if (buf[*pos] == '\0') {
553			if ( ! (mdoc->flags & MDOC_PHRASE))
554				mandoc_msg(MANDOCERR_ARG_QUOTE,
555				    line, *pos, NULL);
556			return ARGS_WORD;
557		}
558
559		mdoc->flags &= ~MDOC_PHRASELIT;
560		buf[(*pos)++] = '\0';
561
562		if ('\0' == buf[*pos])
563			return ARGS_WORD;
564
565		while (' ' == buf[*pos])
566			(*pos)++;
567
568		if ('\0' == buf[*pos])
569			mandoc_msg(MANDOCERR_SPACE_EOL, line, *pos, NULL);
570
571		return ARGS_WORD;
572	}
573
574	p = &buf[*pos];
575	*v = roff_getarg(mdoc->roff, &p, line, pos);
576	if (v == &v_local)
577		free(*v);
578
579	/*
580	 * After parsing the last word in this phrase,
581	 * tell lookup() whether or not to interpret it.
582	 */
583
584	if (*p == '\0' && mdoc->flags & MDOC_PHRASEQL) {
585		mdoc->flags &= ~MDOC_PHRASEQL;
586		mdoc->flags |= MDOC_PHRASEQF;
587	}
588	return ARGS_ALLOC;
589}
590
591/*
592 * Check if the string consists only of space-separated closing
593 * delimiters.  This is a bit of a dance: the first must be a close
594 * delimiter, but it may be followed by middle delimiters.  Arbitrary
595 * whitespace may separate these tokens.
596 */
597static int
598args_checkpunct(const char *buf, int i)
599{
600	int		 j;
601	char		 dbuf[DELIMSZ];
602	enum mdelim	 d;
603
604	/* First token must be a close-delimiter. */
605
606	for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
607		dbuf[j] = buf[i];
608
609	if (DELIMSZ == j)
610		return 0;
611
612	dbuf[j] = '\0';
613	if (DELIM_CLOSE != mdoc_isdelim(dbuf))
614		return 0;
615
616	while (' ' == buf[i])
617		i++;
618
619	/* Remaining must NOT be open/none. */
620
621	while (buf[i]) {
622		j = 0;
623		while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
624			dbuf[j++] = buf[i++];
625
626		if (DELIMSZ == j)
627			return 0;
628
629		dbuf[j] = '\0';
630		d = mdoc_isdelim(dbuf);
631		if (DELIM_NONE == d || DELIM_OPEN == d)
632			return 0;
633
634		while (' ' == buf[i])
635			i++;
636	}
637
638	return '\0' == buf[i];
639}
640
641static void
642argv_multi(struct roff_man *mdoc, int line,
643		struct mdoc_argv *v, int *pos, char *buf)
644{
645	enum margserr	 ac;
646	char		*p;
647
648	for (v->sz = 0; ; v->sz++) {
649		if (buf[*pos] == '-')
650			break;
651		ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
652		if (ac == ARGS_EOLN)
653			break;
654
655		if (v->sz % MULTI_STEP == 0)
656			v->value = mandoc_reallocarray(v->value,
657			    v->sz + MULTI_STEP, sizeof(char *));
658
659		if (ac != ARGS_ALLOC)
660			p = mandoc_strdup(p);
661		v->value[(int)v->sz] = p;
662	}
663}
664
665static void
666argv_single(struct roff_man *mdoc, int line,
667		struct mdoc_argv *v, int *pos, char *buf)
668{
669	enum margserr	 ac;
670	char		*p;
671
672	ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
673	if (ac == ARGS_EOLN)
674		return;
675
676	if (ac != ARGS_ALLOC)
677		p = mandoc_strdup(p);
678
679	v->sz = 1;
680	v->value = mandoc_malloc(sizeof(char *));
681	v->value[0] = p;
682}
683