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
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	ARGV_OPT_SINGLE /* optional arg (e.g., -offset [xxx]) */
47};
48
49struct	mdocarg {
50	enum argsflag	 flags;
51	const enum mdocargt *argvs;
52};
53
54static	void		 argn_free(struct mdoc_arg *, int);
55static	enum margserr	 args(struct mdoc *, int, int *,
56				char *, enum argsflag, char **);
57static	int		 args_checkpunct(const char *, int);
58static	int		 argv_multi(struct mdoc *, int,
59				struct mdoc_argv *, int *, char *);
60static	int		 argv_opt_single(struct mdoc *, int,
61				struct mdoc_argv *, int *, char *);
62static	int		 argv_single(struct mdoc *, int,
63				struct mdoc_argv *, int *, char *);
64
65static	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
94static	const enum mdocargt args_Ex[] = {
95	MDOC_Std,
96	MDOC_ARG_MAX
97};
98
99static	const enum mdocargt args_An[] = {
100	MDOC_Split,
101	MDOC_Nosplit,
102	MDOC_ARG_MAX
103};
104
105static	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
117static	const enum mdocargt args_Bf[] = {
118	MDOC_Emphasis,
119	MDOC_Literal,
120	MDOC_Symbolic,
121	MDOC_ARG_MAX
122};
123
124static	const enum mdocargt args_Bk[] = {
125	MDOC_Words,
126	MDOC_ARG_MAX
127};
128
129static	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
148static	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 */
279enum margverr
280mdoc_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
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_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
422enum margserr
423mdoc_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
451static enum margserr
452args(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 */
601static int
602args_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
645static int
646argv_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
671static int
672argv_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
694static int
695argv_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