1/*	$OpenBSD: mdoc_argv.c,v 1.76 2019/07/11 16:56:52 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 <sys/types.h>
19
20#include <assert.h>
21#include <stdlib.h>
22#include <stdio.h>
23#include <string.h>
24
25#include "mandoc_aux.h"
26#include "mandoc.h"
27#include "roff.h"
28#include "mdoc.h"
29#include "libmandoc.h"
30#include "roff_int.h"
31#include "libmdoc.h"
32
33#define	MULTI_STEP	 5 /* pre-allocate argument values */
34#define	DELIMSZ		 6 /* max possible size of a delimiter */
35
36enum	argsflag {
37	ARGSFL_NONE = 0,
38	ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
39	ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
40};
41
42enum	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};
47
48struct	mdocarg {
49	enum argsflag	 flags;
50	const enum mdocargt *argvs;
51};
52
53static	void		 argn_free(struct mdoc_arg *, int);
54static	enum margserr	 args(struct roff_man *, int, int *,
55				char *, enum argsflag, char **);
56static	int		 args_checkpunct(const char *, int);
57static	void		 argv_multi(struct roff_man *, int,
58				struct mdoc_argv *, int *, char *);
59static	void		 argv_single(struct roff_man *, int,
60				struct mdoc_argv *, int *, char *);
61
62static	const enum argvflag argvflags[MDOC_ARG_MAX] = {
63	ARGV_NONE,	/* MDOC_Split */
64	ARGV_NONE,	/* MDOC_Nosplit */
65	ARGV_NONE,	/* MDOC_Ragged */
66	ARGV_NONE,	/* MDOC_Unfilled */
67	ARGV_NONE,	/* MDOC_Literal */
68	ARGV_SINGLE,	/* MDOC_File */
69	ARGV_SINGLE,	/* MDOC_Offset */
70	ARGV_NONE,	/* MDOC_Bullet */
71	ARGV_NONE,	/* MDOC_Dash */
72	ARGV_NONE,	/* MDOC_Hyphen */
73	ARGV_NONE,	/* MDOC_Item */
74	ARGV_NONE,	/* MDOC_Enum */
75	ARGV_NONE,	/* MDOC_Tag */
76	ARGV_NONE,	/* MDOC_Diag */
77	ARGV_NONE,	/* MDOC_Hang */
78	ARGV_NONE,	/* MDOC_Ohang */
79	ARGV_NONE,	/* MDOC_Inset */
80	ARGV_MULTI,	/* MDOC_Column */
81	ARGV_SINGLE,	/* MDOC_Width */
82	ARGV_NONE,	/* MDOC_Compact */
83	ARGV_NONE,	/* MDOC_Std */
84	ARGV_NONE,	/* MDOC_Filled */
85	ARGV_NONE,	/* MDOC_Words */
86	ARGV_NONE,	/* MDOC_Emphasis */
87	ARGV_NONE,	/* MDOC_Symbolic */
88	ARGV_NONE	/* MDOC_Symbolic */
89};
90
91static	const enum mdocargt args_Ex[] = {
92	MDOC_Std,
93	MDOC_ARG_MAX
94};
95
96static	const enum mdocargt args_An[] = {
97	MDOC_Split,
98	MDOC_Nosplit,
99	MDOC_ARG_MAX
100};
101
102static	const enum mdocargt args_Bd[] = {
103	MDOC_Ragged,
104	MDOC_Unfilled,
105	MDOC_Filled,
106	MDOC_Literal,
107	MDOC_File,
108	MDOC_Offset,
109	MDOC_Compact,
110	MDOC_Centred,
111	MDOC_ARG_MAX
112};
113
114static	const enum mdocargt args_Bf[] = {
115	MDOC_Emphasis,
116	MDOC_Literal,
117	MDOC_Symbolic,
118	MDOC_ARG_MAX
119};
120
121static	const enum mdocargt args_Bk[] = {
122	MDOC_Words,
123	MDOC_ARG_MAX
124};
125
126static	const enum mdocargt args_Bl[] = {
127	MDOC_Bullet,
128	MDOC_Dash,
129	MDOC_Hyphen,
130	MDOC_Item,
131	MDOC_Enum,
132	MDOC_Tag,
133	MDOC_Diag,
134	MDOC_Hang,
135	MDOC_Ohang,
136	MDOC_Inset,
137	MDOC_Column,
138	MDOC_Width,
139	MDOC_Offset,
140	MDOC_Compact,
141	MDOC_Nested,
142	MDOC_ARG_MAX
143};
144
145static	const struct mdocarg mdocargs[MDOC_MAX - MDOC_Dd] = {
146	{ ARGSFL_NONE, NULL }, /* Dd */
147	{ ARGSFL_NONE, NULL }, /* Dt */
148	{ ARGSFL_NONE, NULL }, /* Os */
149	{ ARGSFL_NONE, NULL }, /* Sh */
150	{ ARGSFL_NONE, NULL }, /* Ss */
151	{ ARGSFL_NONE, NULL }, /* Pp */
152	{ ARGSFL_DELIM, NULL }, /* D1 */
153	{ ARGSFL_DELIM, NULL }, /* Dl */
154	{ ARGSFL_NONE, args_Bd }, /* Bd */
155	{ ARGSFL_NONE, NULL }, /* Ed */
156	{ ARGSFL_NONE, args_Bl }, /* Bl */
157	{ ARGSFL_NONE, NULL }, /* El */
158	{ ARGSFL_NONE, NULL }, /* It */
159	{ ARGSFL_DELIM, NULL }, /* Ad */
160	{ ARGSFL_DELIM, args_An }, /* An */
161	{ ARGSFL_DELIM, NULL }, /* Ap */
162	{ ARGSFL_DELIM, NULL }, /* Ar */
163	{ ARGSFL_DELIM, NULL }, /* Cd */
164	{ ARGSFL_DELIM, NULL }, /* Cm */
165	{ ARGSFL_DELIM, NULL }, /* Dv */
166	{ ARGSFL_DELIM, NULL }, /* Er */
167	{ ARGSFL_DELIM, NULL }, /* Ev */
168	{ ARGSFL_NONE, args_Ex }, /* Ex */
169	{ ARGSFL_DELIM, NULL }, /* Fa */
170	{ ARGSFL_NONE, NULL }, /* Fd */
171	{ ARGSFL_DELIM, NULL }, /* Fl */
172	{ ARGSFL_DELIM, NULL }, /* Fn */
173	{ ARGSFL_DELIM, NULL }, /* Ft */
174	{ ARGSFL_DELIM, NULL }, /* Ic */
175	{ ARGSFL_DELIM, NULL }, /* In */
176	{ ARGSFL_DELIM, NULL }, /* Li */
177	{ ARGSFL_NONE, NULL }, /* Nd */
178	{ ARGSFL_DELIM, NULL }, /* Nm */
179	{ ARGSFL_DELIM, NULL }, /* Op */
180	{ ARGSFL_DELIM, NULL }, /* Ot */
181	{ ARGSFL_DELIM, NULL }, /* Pa */
182	{ ARGSFL_NONE, args_Ex }, /* Rv */
183	{ ARGSFL_DELIM, NULL }, /* St */
184	{ ARGSFL_DELIM, NULL }, /* Va */
185	{ ARGSFL_DELIM, NULL }, /* Vt */
186	{ ARGSFL_DELIM, NULL }, /* Xr */
187	{ ARGSFL_NONE, NULL }, /* %A */
188	{ ARGSFL_NONE, NULL }, /* %B */
189	{ ARGSFL_NONE, NULL }, /* %D */
190	{ ARGSFL_NONE, NULL }, /* %I */
191	{ ARGSFL_NONE, NULL }, /* %J */
192	{ ARGSFL_NONE, NULL }, /* %N */
193	{ ARGSFL_NONE, NULL }, /* %O */
194	{ ARGSFL_NONE, NULL }, /* %P */
195	{ ARGSFL_NONE, NULL }, /* %R */
196	{ ARGSFL_NONE, NULL }, /* %T */
197	{ ARGSFL_NONE, NULL }, /* %V */
198	{ ARGSFL_DELIM, NULL }, /* Ac */
199	{ ARGSFL_NONE, NULL }, /* Ao */
200	{ ARGSFL_DELIM, NULL }, /* Aq */
201	{ ARGSFL_DELIM, NULL }, /* At */
202	{ ARGSFL_DELIM, NULL }, /* Bc */
203	{ ARGSFL_NONE, args_Bf }, /* Bf */
204	{ ARGSFL_NONE, NULL }, /* Bo */
205	{ ARGSFL_DELIM, NULL }, /* Bq */
206	{ ARGSFL_DELIM, NULL }, /* Bsx */
207	{ ARGSFL_DELIM, NULL }, /* Bx */
208	{ ARGSFL_NONE, NULL }, /* Db */
209	{ ARGSFL_DELIM, NULL }, /* Dc */
210	{ ARGSFL_NONE, NULL }, /* Do */
211	{ ARGSFL_DELIM, NULL }, /* Dq */
212	{ ARGSFL_DELIM, NULL }, /* Ec */
213	{ ARGSFL_NONE, NULL }, /* Ef */
214	{ ARGSFL_DELIM, NULL }, /* Em */
215	{ ARGSFL_NONE, NULL }, /* Eo */
216	{ ARGSFL_DELIM, NULL }, /* Fx */
217	{ ARGSFL_DELIM, NULL }, /* Ms */
218	{ ARGSFL_DELIM, NULL }, /* No */
219	{ ARGSFL_DELIM, NULL }, /* Ns */
220	{ ARGSFL_DELIM, NULL }, /* Nx */
221	{ ARGSFL_DELIM, NULL }, /* Ox */
222	{ ARGSFL_DELIM, NULL }, /* Pc */
223	{ ARGSFL_DELIM, NULL }, /* Pf */
224	{ ARGSFL_NONE, NULL }, /* Po */
225	{ ARGSFL_DELIM, NULL }, /* Pq */
226	{ ARGSFL_DELIM, NULL }, /* Qc */
227	{ ARGSFL_DELIM, NULL }, /* Ql */
228	{ ARGSFL_NONE, NULL }, /* Qo */
229	{ ARGSFL_DELIM, NULL }, /* Qq */
230	{ ARGSFL_NONE, NULL }, /* Re */
231	{ ARGSFL_NONE, NULL }, /* Rs */
232	{ ARGSFL_DELIM, NULL }, /* Sc */
233	{ ARGSFL_NONE, NULL }, /* So */
234	{ ARGSFL_DELIM, NULL }, /* Sq */
235	{ ARGSFL_NONE, NULL }, /* Sm */
236	{ ARGSFL_DELIM, NULL }, /* Sx */
237	{ ARGSFL_DELIM, NULL }, /* Sy */
238	{ ARGSFL_DELIM, NULL }, /* Tn */
239	{ ARGSFL_DELIM, NULL }, /* Ux */
240	{ ARGSFL_DELIM, NULL }, /* Xc */
241	{ ARGSFL_NONE, NULL }, /* Xo */
242	{ ARGSFL_NONE, NULL }, /* Fo */
243	{ ARGSFL_DELIM, NULL }, /* Fc */
244	{ ARGSFL_NONE, NULL }, /* Oo */
245	{ ARGSFL_DELIM, NULL }, /* Oc */
246	{ ARGSFL_NONE, args_Bk }, /* Bk */
247	{ ARGSFL_NONE, NULL }, /* Ek */
248	{ ARGSFL_NONE, NULL }, /* Bt */
249	{ ARGSFL_NONE, NULL }, /* Hf */
250	{ ARGSFL_DELIM, NULL }, /* Fr */
251	{ ARGSFL_NONE, NULL }, /* Ud */
252	{ ARGSFL_DELIM, NULL }, /* Lb */
253	{ ARGSFL_NONE, NULL }, /* Lp */
254	{ ARGSFL_DELIM, NULL }, /* Lk */
255	{ ARGSFL_DELIM, NULL }, /* Mt */
256	{ ARGSFL_DELIM, NULL }, /* Brq */
257	{ ARGSFL_NONE, NULL }, /* Bro */
258	{ ARGSFL_DELIM, NULL }, /* Brc */
259	{ ARGSFL_NONE, NULL }, /* %C */
260	{ ARGSFL_NONE, NULL }, /* Es */
261	{ ARGSFL_DELIM, NULL }, /* En */
262	{ ARGSFL_DELIM, NULL }, /* Dx */
263	{ ARGSFL_NONE, NULL }, /* %Q */
264	{ ARGSFL_NONE, NULL }, /* %U */
265	{ ARGSFL_NONE, NULL }, /* Ta */
266};
267
268
269/*
270 * Parse flags and their arguments from the input line.
271 * These come in the form -flag [argument ...].
272 * Some flags take no argument, some one, some multiple.
273 */
274void
275mdoc_argv(struct roff_man *mdoc, int line, enum roff_tok tok,
276	struct mdoc_arg **reta, int *pos, char *buf)
277{
278	struct mdoc_argv	  tmpv;
279	struct mdoc_argv	**retv;
280	const enum mdocargt	 *argtable;
281	char			 *argname;
282	int			  ipos, retc;
283	char			  savechar;
284
285	*reta = NULL;
286
287	/* Which flags does this macro support? */
288
289	assert(tok >= MDOC_Dd && tok < MDOC_MAX);
290	argtable = mdocargs[tok - MDOC_Dd].argvs;
291	if (argtable == NULL)
292		return;
293
294	/* Loop over the flags on the input line. */
295
296	ipos = *pos;
297	while (buf[ipos] == '-') {
298
299		/* Seek to the first unescaped space. */
300
301		for (argname = buf + ++ipos; buf[ipos] != '\0'; ipos++)
302			if (buf[ipos] == ' ' && buf[ipos - 1] != '\\')
303				break;
304
305		/*
306		 * We want to nil-terminate the word to look it up.
307		 * But we may not have a flag, in which case we need
308		 * to restore the line as-is.  So keep around the
309		 * stray byte, which we'll reset upon exiting.
310		 */
311
312		if ((savechar = buf[ipos]) != '\0')
313			buf[ipos++] = '\0';
314
315		/*
316		 * Now look up the word as a flag.  Use temporary
317		 * storage that we'll copy into the node's flags.
318		 */
319
320		while ((tmpv.arg = *argtable++) != MDOC_ARG_MAX)
321			if ( ! strcmp(argname, mdoc_argnames[tmpv.arg]))
322				break;
323
324		/* If it isn't a flag, restore the saved byte. */
325
326		if (tmpv.arg == MDOC_ARG_MAX) {
327			if (savechar != '\0')
328				buf[ipos - 1] = savechar;
329			break;
330		}
331
332		/* Read to the next word (the first argument). */
333
334		while (buf[ipos] == ' ')
335			ipos++;
336
337		/* Parse the arguments of the flag. */
338
339		tmpv.line  = line;
340		tmpv.pos   = *pos;
341		tmpv.sz    = 0;
342		tmpv.value = NULL;
343
344		switch (argvflags[tmpv.arg]) {
345		case ARGV_SINGLE:
346			argv_single(mdoc, line, &tmpv, &ipos, buf);
347			break;
348		case ARGV_MULTI:
349			argv_multi(mdoc, line, &tmpv, &ipos, buf);
350			break;
351		case ARGV_NONE:
352			break;
353		}
354
355		/* Append to the return values. */
356
357		if (*reta == NULL)
358			*reta = mandoc_calloc(1, sizeof(**reta));
359
360		retc = ++(*reta)->argc;
361		retv = &(*reta)->argv;
362		*retv = mandoc_reallocarray(*retv, retc, sizeof(**retv));
363		memcpy(*retv + retc - 1, &tmpv, sizeof(**retv));
364
365		/* Prepare for parsing the next flag. */
366
367		*pos = ipos;
368		argtable = mdocargs[tok - MDOC_Dd].argvs;
369	}
370}
371
372void
373mdoc_argv_free(struct mdoc_arg *p)
374{
375	int		 i;
376
377	if (NULL == p)
378		return;
379
380	if (p->refcnt) {
381		--(p->refcnt);
382		if (p->refcnt)
383			return;
384	}
385	assert(p->argc);
386
387	for (i = (int)p->argc - 1; i >= 0; i--)
388		argn_free(p, i);
389
390	free(p->argv);
391	free(p);
392}
393
394static void
395argn_free(struct mdoc_arg *p, int iarg)
396{
397	struct mdoc_argv *arg;
398	int		  j;
399
400	arg = &p->argv[iarg];
401
402	if (arg->sz && arg->value) {
403		for (j = (int)arg->sz - 1; j >= 0; j--)
404			free(arg->value[j]);
405		free(arg->value);
406	}
407
408	for (--p->argc; iarg < (int)p->argc; iarg++)
409		p->argv[iarg] = p->argv[iarg+1];
410}
411
412enum margserr
413mdoc_args(struct roff_man *mdoc, int line, int *pos,
414	char *buf, enum roff_tok tok, char **v)
415{
416	struct roff_node *n;
417	enum argsflag	  fl;
418
419	fl = tok == TOKEN_NONE ? ARGSFL_NONE : mdocargs[tok - MDOC_Dd].flags;
420
421	/*
422	 * We know that we're in an `It', so it's reasonable to expect
423	 * us to be sitting in a `Bl'.  Someday this may not be the case
424	 * (if we allow random `It's sitting out there), so provide a
425	 * safe fall-back into the default behaviour.
426	 */
427
428	if (tok == MDOC_It) {
429		for (n = mdoc->last; n != NULL; n = n->parent) {
430			if (n->tok != MDOC_Bl)
431				continue;
432			if (n->norm->Bl.type == LIST_column)
433				fl = ARGSFL_TABSEP;
434			break;
435		}
436	}
437
438	return args(mdoc, line, pos, buf, fl, v);
439}
440
441static enum margserr
442args(struct roff_man *mdoc, int line, int *pos,
443		char *buf, enum argsflag fl, char **v)
444{
445	char		*p;
446	char		*v_local;
447	int		 pairs;
448
449	if (buf[*pos] == '\0') {
450		if (mdoc->flags & MDOC_PHRASELIT &&
451		    ! (mdoc->flags & MDOC_PHRASE)) {
452			mandoc_msg(MANDOCERR_ARG_QUOTE, line, *pos, NULL);
453			mdoc->flags &= ~MDOC_PHRASELIT;
454		}
455		mdoc->flags &= ~MDOC_PHRASEQL;
456		return ARGS_EOLN;
457	}
458
459	if (v == NULL)
460		v = &v_local;
461	*v = buf + *pos;
462
463	if (fl == ARGSFL_DELIM && args_checkpunct(buf, *pos))
464		return ARGS_PUNCT;
465
466	/*
467	 * Tabs in `It' lines in `Bl -column' can't be escaped.
468	 * Phrases are reparsed for `Ta' and other macros later.
469	 */
470
471	if (fl == ARGSFL_TABSEP) {
472		if ((p = strchr(*v, '\t')) != NULL) {
473
474			/*
475			 * Words right before and right after
476			 * tab characters are not parsed,
477			 * unless there is a blank in between.
478			 */
479
480			if (p > buf && p[-1] != ' ')
481				mdoc->flags |= MDOC_PHRASEQL;
482			if (p[1] != ' ')
483				mdoc->flags |= MDOC_PHRASEQN;
484
485			/*
486			 * One or more blanks after a tab cause
487			 * one leading blank in the next column.
488			 * So skip all but one of them.
489			 */
490
491			*pos += (int)(p - *v) + 1;
492			while (buf[*pos] == ' ' && buf[*pos + 1] == ' ')
493				(*pos)++;
494
495			/*
496			 * A tab at the end of an input line
497			 * switches to the next column.
498			 */
499
500			if (buf[*pos] == '\0' || buf[*pos + 1] == '\0')
501				mdoc->flags |= MDOC_PHRASEQN;
502		} else {
503			p = strchr(*v, '\0');
504			if (p[-1] == ' ')
505				mandoc_msg(MANDOCERR_SPACE_EOL,
506				    line, *pos, NULL);
507			*pos += (int)(p - *v);
508		}
509
510		/* Skip any trailing blank characters. */
511		while (p > *v && p[-1] == ' ' &&
512		    (p - 1 == *v || p[-2] != '\\'))
513			p--;
514		*p = '\0';
515
516		return ARGS_PHRASE;
517	}
518
519	/*
520	 * Process a quoted literal.  A quote begins with a double-quote
521	 * and ends with a double-quote NOT preceded by a double-quote.
522	 * NUL-terminate the literal in place.
523	 * Collapse pairs of quotes inside quoted literals.
524	 * Whitespace is NOT involved in literal termination.
525	 */
526
527	if (mdoc->flags & MDOC_PHRASELIT ||
528	    (mdoc->flags & MDOC_PHRASE && buf[*pos] == '\"')) {
529		if ((mdoc->flags & MDOC_PHRASELIT) == 0) {
530			*v = &buf[++(*pos)];
531			mdoc->flags |= MDOC_PHRASELIT;
532		}
533		pairs = 0;
534		for ( ; buf[*pos]; (*pos)++) {
535			/* Move following text left after quoted quotes. */
536			if (pairs)
537				buf[*pos - pairs] = buf[*pos];
538			if ('\"' != buf[*pos])
539				continue;
540			/* Unquoted quotes end quoted args. */
541			if ('\"' != buf[*pos + 1])
542				break;
543			/* Quoted quotes collapse. */
544			pairs++;
545			(*pos)++;
546		}
547		if (pairs)
548			buf[*pos - pairs] = '\0';
549
550		if (buf[*pos] == '\0') {
551			if ( ! (mdoc->flags & MDOC_PHRASE))
552				mandoc_msg(MANDOCERR_ARG_QUOTE,
553				    line, *pos, NULL);
554			return ARGS_WORD;
555		}
556
557		mdoc->flags &= ~MDOC_PHRASELIT;
558		buf[(*pos)++] = '\0';
559
560		if ('\0' == buf[*pos])
561			return ARGS_WORD;
562
563		while (' ' == buf[*pos])
564			(*pos)++;
565
566		if ('\0' == buf[*pos])
567			mandoc_msg(MANDOCERR_SPACE_EOL, line, *pos, NULL);
568
569		return ARGS_WORD;
570	}
571
572	p = &buf[*pos];
573	*v = roff_getarg(mdoc->roff, &p, line, pos);
574	if (v == &v_local)
575		free(*v);
576
577	/*
578	 * After parsing the last word in this phrase,
579	 * tell lookup() whether or not to interpret it.
580	 */
581
582	if (*p == '\0' && mdoc->flags & MDOC_PHRASEQL) {
583		mdoc->flags &= ~MDOC_PHRASEQL;
584		mdoc->flags |= MDOC_PHRASEQF;
585	}
586	return ARGS_ALLOC;
587}
588
589/*
590 * Check if the string consists only of space-separated closing
591 * delimiters.  This is a bit of a dance: the first must be a close
592 * delimiter, but it may be followed by middle delimiters.  Arbitrary
593 * whitespace may separate these tokens.
594 */
595static int
596args_checkpunct(const char *buf, int i)
597{
598	int		 j;
599	char		 dbuf[DELIMSZ];
600	enum mdelim	 d;
601
602	/* First token must be a close-delimiter. */
603
604	for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
605		dbuf[j] = buf[i];
606
607	if (DELIMSZ == j)
608		return 0;
609
610	dbuf[j] = '\0';
611	if (DELIM_CLOSE != mdoc_isdelim(dbuf))
612		return 0;
613
614	while (' ' == buf[i])
615		i++;
616
617	/* Remaining must NOT be open/none. */
618
619	while (buf[i]) {
620		j = 0;
621		while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
622			dbuf[j++] = buf[i++];
623
624		if (DELIMSZ == j)
625			return 0;
626
627		dbuf[j] = '\0';
628		d = mdoc_isdelim(dbuf);
629		if (DELIM_NONE == d || DELIM_OPEN == d)
630			return 0;
631
632		while (' ' == buf[i])
633			i++;
634	}
635
636	return '\0' == buf[i];
637}
638
639static void
640argv_multi(struct roff_man *mdoc, int line,
641		struct mdoc_argv *v, int *pos, char *buf)
642{
643	enum margserr	 ac;
644	char		*p;
645
646	for (v->sz = 0; ; v->sz++) {
647		if (buf[*pos] == '-')
648			break;
649		ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
650		if (ac == ARGS_EOLN)
651			break;
652
653		if (v->sz % MULTI_STEP == 0)
654			v->value = mandoc_reallocarray(v->value,
655			    v->sz + MULTI_STEP, sizeof(char *));
656
657		if (ac != ARGS_ALLOC)
658			p = mandoc_strdup(p);
659		v->value[(int)v->sz] = p;
660	}
661}
662
663static void
664argv_single(struct roff_man *mdoc, int line,
665		struct mdoc_argv *v, int *pos, char *buf)
666{
667	enum margserr	 ac;
668	char		*p;
669
670	ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
671	if (ac == ARGS_EOLN)
672		return;
673
674	if (ac != ARGS_ALLOC)
675		p = mandoc_strdup(p);
676
677	v->sz = 1;
678	v->value = mandoc_malloc(sizeof(char *));
679	v->value[0] = p;
680}
681