summaryrefslogtreecommitdiffstats
path: root/contrib/mdocml/mdoc_argv.c
blob: b47c7dbdea342325a975c789b366a857c8b13187 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
/*	$Id: mdoc_argv.c,v 1.109 2016/08/28 16:15:12 schwarze Exp $ */
/*
 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2012, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "config.h"

#include <sys/types.h>

#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "mandoc_aux.h"
#include "mandoc.h"
#include "roff.h"
#include "mdoc.h"
#include "libmandoc.h"
#include "roff_int.h"
#include "libmdoc.h"

#define	MULTI_STEP	 5 /* pre-allocate argument values */
#define	DELIMSZ		 6 /* max possible size of a delimiter */

enum	argsflag {
	ARGSFL_NONE = 0,
	ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
	ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
};

enum	argvflag {
	ARGV_NONE, /* no args to flag (e.g., -split) */
	ARGV_SINGLE, /* one arg to flag (e.g., -file xxx)  */
	ARGV_MULTI /* multiple args (e.g., -column xxx yyy) */
};

struct	mdocarg {
	enum argsflag	 flags;
	const enum mdocargt *argvs;
};

static	void		 argn_free(struct mdoc_arg *, int);
static	enum margserr	 args(struct roff_man *, int, int *,
				char *, enum argsflag, char **);
static	int		 args_checkpunct(const char *, int);
static	void		 argv_multi(struct roff_man *, int,
				struct mdoc_argv *, int *, char *);
static	void		 argv_single(struct roff_man *, int,
				struct mdoc_argv *, int *, char *);

static	const enum argvflag argvflags[MDOC_ARG_MAX] = {
	ARGV_NONE,	/* MDOC_Split */
	ARGV_NONE,	/* MDOC_Nosplit */
	ARGV_NONE,	/* MDOC_Ragged */
	ARGV_NONE,	/* MDOC_Unfilled */
	ARGV_NONE,	/* MDOC_Literal */
	ARGV_SINGLE,	/* MDOC_File */
	ARGV_SINGLE,	/* MDOC_Offset */
	ARGV_NONE,	/* MDOC_Bullet */
	ARGV_NONE,	/* MDOC_Dash */
	ARGV_NONE,	/* MDOC_Hyphen */
	ARGV_NONE,	/* MDOC_Item */
	ARGV_NONE,	/* MDOC_Enum */
	ARGV_NONE,	/* MDOC_Tag */
	ARGV_NONE,	/* MDOC_Diag */
	ARGV_NONE,	/* MDOC_Hang */
	ARGV_NONE,	/* MDOC_Ohang */
	ARGV_NONE,	/* MDOC_Inset */
	ARGV_MULTI,	/* MDOC_Column */
	ARGV_SINGLE,	/* MDOC_Width */
	ARGV_NONE,	/* MDOC_Compact */
	ARGV_NONE,	/* MDOC_Std */
	ARGV_NONE,	/* MDOC_Filled */
	ARGV_NONE,	/* MDOC_Words */
	ARGV_NONE,	/* MDOC_Emphasis */
	ARGV_NONE,	/* MDOC_Symbolic */
	ARGV_NONE	/* MDOC_Symbolic */
};

static	const enum mdocargt args_Ex[] = {
	MDOC_Std,
	MDOC_ARG_MAX
};

static	const enum mdocargt args_An[] = {
	MDOC_Split,
	MDOC_Nosplit,
	MDOC_ARG_MAX
};

static	const enum mdocargt args_Bd[] = {
	MDOC_Ragged,
	MDOC_Unfilled,
	MDOC_Filled,
	MDOC_Literal,
	MDOC_File,
	MDOC_Offset,
	MDOC_Compact,
	MDOC_Centred,
	MDOC_ARG_MAX
};

static	const enum mdocargt args_Bf[] = {
	MDOC_Emphasis,
	MDOC_Literal,
	MDOC_Symbolic,
	MDOC_ARG_MAX
};

static	const enum mdocargt args_Bk[] = {
	MDOC_Words,
	MDOC_ARG_MAX
};

static	const enum mdocargt args_Bl[] = {
	MDOC_Bullet,
	MDOC_Dash,
	MDOC_Hyphen,
	MDOC_Item,
	MDOC_Enum,
	MDOC_Tag,
	MDOC_Diag,
	MDOC_Hang,
	MDOC_Ohang,
	MDOC_Inset,
	MDOC_Column,
	MDOC_Width,
	MDOC_Offset,
	MDOC_Compact,
	MDOC_Nested,
	MDOC_ARG_MAX
};

static	const struct mdocarg mdocargs[MDOC_MAX] = {
	{ ARGSFL_DELIM, NULL }, /* Ap */
	{ ARGSFL_NONE, NULL }, /* Dd */
	{ ARGSFL_NONE, NULL }, /* Dt */
	{ ARGSFL_NONE, NULL }, /* Os */
	{ ARGSFL_NONE, NULL }, /* Sh */
	{ ARGSFL_NONE, NULL }, /* Ss */
	{ ARGSFL_NONE, NULL }, /* Pp */
	{ ARGSFL_DELIM, NULL }, /* D1 */
	{ ARGSFL_DELIM, NULL }, /* Dl */
	{ ARGSFL_NONE, args_Bd }, /* Bd */
	{ ARGSFL_NONE, NULL }, /* Ed */
	{ ARGSFL_NONE, args_Bl }, /* Bl */
	{ ARGSFL_NONE, NULL }, /* El */
	{ ARGSFL_NONE, NULL }, /* It */
	{ ARGSFL_DELIM, NULL }, /* Ad */
	{ ARGSFL_DELIM, args_An }, /* An */
	{ ARGSFL_DELIM, NULL }, /* Ar */
	{ ARGSFL_DELIM, NULL }, /* Cd */
	{ ARGSFL_DELIM, NULL }, /* Cm */
	{ ARGSFL_DELIM, NULL }, /* Dv */
	{ ARGSFL_DELIM, NULL }, /* Er */
	{ ARGSFL_DELIM, NULL }, /* Ev */
	{ ARGSFL_NONE, args_Ex }, /* Ex */
	{ ARGSFL_DELIM, NULL }, /* Fa */
	{ ARGSFL_NONE, NULL }, /* Fd */
	{ ARGSFL_DELIM, NULL }, /* Fl */
	{ ARGSFL_DELIM, NULL }, /* Fn */
	{ ARGSFL_DELIM, NULL }, /* Ft */
	{ ARGSFL_DELIM, NULL }, /* Ic */
	{ ARGSFL_DELIM, NULL }, /* In */
	{ ARGSFL_DELIM, NULL }, /* Li */
	{ ARGSFL_NONE, NULL }, /* Nd */
	{ ARGSFL_DELIM, NULL }, /* Nm */
	{ ARGSFL_DELIM, NULL }, /* Op */
	{ ARGSFL_DELIM, NULL }, /* Ot */
	{ ARGSFL_DELIM, NULL }, /* Pa */
	{ ARGSFL_NONE, args_Ex }, /* Rv */
	{ ARGSFL_DELIM, NULL }, /* St */
	{ ARGSFL_DELIM, NULL }, /* Va */
	{ ARGSFL_DELIM, NULL }, /* Vt */
	{ ARGSFL_DELIM, NULL }, /* Xr */
	{ ARGSFL_NONE, NULL }, /* %A */
	{ ARGSFL_NONE, NULL }, /* %B */
	{ ARGSFL_NONE, NULL }, /* %D */
	{ ARGSFL_NONE, NULL }, /* %I */
	{ ARGSFL_NONE, NULL }, /* %J */
	{ ARGSFL_NONE, NULL }, /* %N */
	{ ARGSFL_NONE, NULL }, /* %O */
	{ ARGSFL_NONE, NULL }, /* %P */
	{ ARGSFL_NONE, NULL }, /* %R */
	{ ARGSFL_NONE, NULL }, /* %T */
	{ ARGSFL_NONE, NULL }, /* %V */
	{ ARGSFL_DELIM, NULL }, /* Ac */
	{ ARGSFL_NONE, NULL }, /* Ao */
	{ ARGSFL_DELIM, NULL }, /* Aq */
	{ ARGSFL_DELIM, NULL }, /* At */
	{ ARGSFL_DELIM, NULL }, /* Bc */
	{ ARGSFL_NONE, args_Bf }, /* Bf */
	{ ARGSFL_NONE, NULL }, /* Bo */
	{ ARGSFL_DELIM, NULL }, /* Bq */
	{ ARGSFL_DELIM, NULL }, /* Bsx */
	{ ARGSFL_DELIM, NULL }, /* Bx */
	{ ARGSFL_NONE, NULL }, /* Db */
	{ ARGSFL_DELIM, NULL }, /* Dc */
	{ ARGSFL_NONE, NULL }, /* Do */
	{ ARGSFL_DELIM, NULL }, /* Dq */
	{ ARGSFL_DELIM, NULL }, /* Ec */
	{ ARGSFL_NONE, NULL }, /* Ef */
	{ ARGSFL_DELIM, NULL }, /* Em */
	{ ARGSFL_NONE, NULL }, /* Eo */
	{ ARGSFL_DELIM, NULL }, /* Fx */
	{ ARGSFL_DELIM, NULL }, /* Ms */
	{ ARGSFL_DELIM, NULL }, /* No */
	{ ARGSFL_DELIM, NULL }, /* Ns */
	{ ARGSFL_DELIM, NULL }, /* Nx */
	{ ARGSFL_DELIM, NULL }, /* Ox */
	{ ARGSFL_DELIM, NULL }, /* Pc */
	{ ARGSFL_DELIM, NULL }, /* Pf */
	{ ARGSFL_NONE, NULL }, /* Po */
	{ ARGSFL_DELIM, NULL }, /* Pq */
	{ ARGSFL_DELIM, NULL }, /* Qc */
	{ ARGSFL_DELIM, NULL }, /* Ql */
	{ ARGSFL_NONE, NULL }, /* Qo */
	{ ARGSFL_DELIM, NULL }, /* Qq */
	{ ARGSFL_NONE, NULL }, /* Re */
	{ ARGSFL_NONE, NULL }, /* Rs */
	{ ARGSFL_DELIM, NULL }, /* Sc */
	{ ARGSFL_NONE, NULL }, /* So */
	{ ARGSFL_DELIM, NULL }, /* Sq */
	{ ARGSFL_NONE, NULL }, /* Sm */
	{ ARGSFL_DELIM, NULL }, /* Sx */
	{ ARGSFL_DELIM, NULL }, /* Sy */
	{ ARGSFL_DELIM, NULL }, /* Tn */
	{ ARGSFL_DELIM, NULL }, /* Ux */
	{ ARGSFL_DELIM, NULL }, /* Xc */
	{ ARGSFL_NONE, NULL }, /* Xo */
	{ ARGSFL_NONE, NULL }, /* Fo */
	{ ARGSFL_DELIM, NULL }, /* Fc */
	{ ARGSFL_NONE, NULL }, /* Oo */
	{ ARGSFL_DELIM, NULL }, /* Oc */
	{ ARGSFL_NONE, args_Bk }, /* Bk */
	{ ARGSFL_NONE, NULL }, /* Ek */
	{ ARGSFL_NONE, NULL }, /* Bt */
	{ ARGSFL_NONE, NULL }, /* Hf */
	{ ARGSFL_DELIM, NULL }, /* Fr */
	{ ARGSFL_NONE, NULL }, /* Ud */
	{ ARGSFL_DELIM, NULL }, /* Lb */
	{ ARGSFL_NONE, NULL }, /* Lp */
	{ ARGSFL_DELIM, NULL }, /* Lk */
	{ ARGSFL_DELIM, NULL }, /* Mt */
	{ ARGSFL_DELIM, NULL }, /* Brq */
	{ ARGSFL_NONE, NULL }, /* Bro */
	{ ARGSFL_DELIM, NULL }, /* Brc */
	{ ARGSFL_NONE, NULL }, /* %C */
	{ ARGSFL_NONE, NULL }, /* Es */
	{ ARGSFL_DELIM, NULL }, /* En */
	{ ARGSFL_DELIM, NULL }, /* Dx */
	{ ARGSFL_NONE, NULL }, /* %Q */
	{ ARGSFL_NONE, NULL }, /* br */
	{ ARGSFL_NONE, NULL }, /* sp */
	{ ARGSFL_NONE, NULL }, /* %U */
	{ ARGSFL_NONE, NULL }, /* Ta */
	{ ARGSFL_NONE, NULL }, /* ll */
};


/*
 * Parse flags and their arguments from the input line.
 * These come in the form -flag [argument ...].
 * Some flags take no argument, some one, some multiple.
 */
void
mdoc_argv(struct roff_man *mdoc, int line, int tok,
	struct mdoc_arg **reta, int *pos, char *buf)
{
	struct mdoc_argv	  tmpv;
	struct mdoc_argv	**retv;
	const enum mdocargt	 *argtable;
	char			 *argname;
	int			  ipos, retc;
	char			  savechar;

	*reta = NULL;

	/* Which flags does this macro support? */

	argtable = mdocargs[tok].argvs;
	if (argtable == NULL)
		return;

	/* Loop over the flags on the input line. */

	ipos = *pos;
	while (buf[ipos] == '-') {

		/* Seek to the first unescaped space. */

		for (argname = buf + ++ipos; buf[ipos] != '\0'; ipos++)
			if (buf[ipos] == ' ' && buf[ipos - 1] != '\\')
				break;

		/*
		 * We want to nil-terminate the word to look it up.
		 * But we may not have a flag, in which case we need
		 * to restore the line as-is.  So keep around the
		 * stray byte, which we'll reset upon exiting.
		 */

		if ((savechar = buf[ipos]) != '\0')
			buf[ipos++] = '\0';

		/*
		 * Now look up the word as a flag.  Use temporary
		 * storage that we'll copy into the node's flags.
		 */

		while ((tmpv.arg = *argtable++) != MDOC_ARG_MAX)
			if ( ! strcmp(argname, mdoc_argnames[tmpv.arg]))
				break;

		/* If it isn't a flag, restore the saved byte. */

		if (tmpv.arg == MDOC_ARG_MAX) {
			if (savechar != '\0')
				buf[ipos - 1] = savechar;
			break;
		}

		/* Read to the next word (the first argument). */

		while (buf[ipos] == ' ')
			ipos++;

		/* Parse the arguments of the flag. */

		tmpv.line  = line;
		tmpv.pos   = *pos;
		tmpv.sz    = 0;
		tmpv.value = NULL;

		switch (argvflags[tmpv.arg]) {
		case ARGV_SINGLE:
			argv_single(mdoc, line, &tmpv, &ipos, buf);
			break;
		case ARGV_MULTI:
			argv_multi(mdoc, line, &tmpv, &ipos, buf);
			break;
		case ARGV_NONE:
			break;
		}

		/* Append to the return values. */

		if (*reta == NULL)
			*reta = mandoc_calloc(1, sizeof(**reta));

		retc = ++(*reta)->argc;
		retv = &(*reta)->argv;
		*retv = mandoc_reallocarray(*retv, retc, sizeof(**retv));
		memcpy(*retv + retc - 1, &tmpv, sizeof(**retv));

		/* Prepare for parsing the next flag. */

		*pos = ipos;
		argtable = mdocargs[tok].argvs;
	}
}

void
mdoc_argv_free(struct mdoc_arg *p)
{
	int		 i;

	if (NULL == p)
		return;

	if (p->refcnt) {
		--(p->refcnt);
		if (p->refcnt)
			return;
	}
	assert(p->argc);

	for (i = (int)p->argc - 1; i >= 0; i--)
		argn_free(p, i);

	free(p->argv);
	free(p);
}

static void
argn_free(struct mdoc_arg *p, int iarg)
{
	struct mdoc_argv *arg;
	int		  j;

	arg = &p->argv[iarg];

	if (arg->sz && arg->value) {
		for (j = (int)arg->sz - 1; j >= 0; j--)
			free(arg->value[j]);
		free(arg->value);
	}

	for (--p->argc; iarg < (int)p->argc; iarg++)
		p->argv[iarg] = p->argv[iarg+1];
}

enum margserr
mdoc_args(struct roff_man *mdoc, int line, int *pos,
	char *buf, int tok, char **v)
{
	struct roff_node *n;
	char		 *v_local;
	enum argsflag	  fl;

	if (v == NULL)
		v = &v_local;
	fl = tok == TOKEN_NONE ? ARGSFL_NONE : mdocargs[tok].flags;
	if (tok != MDOC_It)
		return args(mdoc, line, pos, buf, fl, v);

	/*
	 * We know that we're in an `It', so it's reasonable to expect
	 * us to be sitting in a `Bl'.  Someday this may not be the case
	 * (if we allow random `It's sitting out there), so provide a
	 * safe fall-back into the default behaviour.
	 */

	for (n = mdoc->last; n; n = n->parent)
		if (MDOC_Bl == n->tok)
			if (LIST_column == n->norm->Bl.type) {
				fl = ARGSFL_TABSEP;
				break;
			}

	return args(mdoc, line, pos, buf, fl, v);
}

static enum margserr
args(struct roff_man *mdoc, int line, int *pos,
		char *buf, enum argsflag fl, char **v)
{
	char		*p;
	int		 pairs;

	if (buf[*pos] == '\0') {
		if (mdoc->flags & MDOC_PHRASELIT &&
		    ! (mdoc->flags & MDOC_PHRASE)) {
			mandoc_msg(MANDOCERR_ARG_QUOTE,
			    mdoc->parse, line, *pos, NULL);
			mdoc->flags &= ~MDOC_PHRASELIT;
		}
		return ARGS_EOLN;
	}

	*v = buf + *pos;

	if (fl == ARGSFL_DELIM && args_checkpunct(buf, *pos))
		return ARGS_PUNCT;

	/*
	 * Tabs in `It' lines in `Bl -column' can't be escaped.
	 * Phrases are reparsed for `Ta' and other macros later.
	 */

	if (fl == ARGSFL_TABSEP) {
		if ((p = strchr(*v, '\t')) != NULL) {

			/*
			 * Words right before and right after
			 * tab characters are not parsed,
			 * unless there is a blank in between.
			 */

			if (p > buf && p[-1] != ' ')
				mdoc->flags |= MDOC_PHRASEQL;
			if (p[1] != ' ')
				mdoc->flags |= MDOC_PHRASEQN;

			/*
			 * One or more blanks after a tab cause
			 * one leading blank in the next column.
			 * So skip all but one of them.
			 */

			*pos += (int)(p - *v) + 1;
			while (buf[*pos] == ' ' && buf[*pos + 1] == ' ')
				(*pos)++;

			/*
			 * A tab at the end of an input line
			 * switches to the next column.
			 */

			if (buf[*pos] == '\0' || buf[*pos + 1] == '\0')
				mdoc->flags |= MDOC_PHRASEQN;
		} else {
			p = strchr(*v, '\0');
			if (p[-1] == ' ')
				mandoc_msg(MANDOCERR_SPACE_EOL,
				    mdoc->parse, line, *pos, NULL);
			*pos += (int)(p - *v);
		}

		/* Skip any trailing blank characters. */
		while (p > *v && p[-1] == ' ' &&
		    (p - 1 == *v || p[-2] != '\\'))
			p--;
		*p = '\0';

		return ARGS_PHRASE;
	}

	/*
	 * Process a quoted literal.  A quote begins with a double-quote
	 * and ends with a double-quote NOT preceded by a double-quote.
	 * NUL-terminate the literal in place.
	 * Collapse pairs of quotes inside quoted literals.
	 * Whitespace is NOT involved in literal termination.
	 */

	if (mdoc->flags & MDOC_PHRASELIT || buf[*pos] == '\"') {
		if ( ! (mdoc->flags & MDOC_PHRASELIT))
			*v = &buf[++(*pos)];

		if (mdoc->flags & MDOC_PHRASE)
			mdoc->flags |= MDOC_PHRASELIT;

		pairs = 0;
		for ( ; buf[*pos]; (*pos)++) {
			/* Move following text left after quoted quotes. */
			if (pairs)
				buf[*pos - pairs] = buf[*pos];
			if ('\"' != buf[*pos])
				continue;
			/* Unquoted quotes end quoted args. */
			if ('\"' != buf[*pos + 1])
				break;
			/* Quoted quotes collapse. */
			pairs++;
			(*pos)++;
		}
		if (pairs)
			buf[*pos - pairs] = '\0';

		if (buf[*pos] == '\0') {
			if ( ! (mdoc->flags & MDOC_PHRASE))
				mandoc_msg(MANDOCERR_ARG_QUOTE,
				    mdoc->parse, line, *pos, NULL);
			return ARGS_QWORD;
		}

		mdoc->flags &= ~MDOC_PHRASELIT;
		buf[(*pos)++] = '\0';

		if ('\0' == buf[*pos])
			return ARGS_QWORD;

		while (' ' == buf[*pos])
			(*pos)++;

		if ('\0' == buf[*pos])
			mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
			    line, *pos, NULL);

		return ARGS_QWORD;
	}

	p = &buf[*pos];
	*v = mandoc_getarg(mdoc->parse, &p, line, pos);

	/*
	 * After parsing the last word in this phrase,
	 * tell lookup() whether or not to interpret it.
	 */

	if (*p == '\0' && mdoc->flags & MDOC_PHRASEQL) {
		mdoc->flags &= ~MDOC_PHRASEQL;
		mdoc->flags |= MDOC_PHRASEQF;
	}
	return ARGS_WORD;
}

/*
 * Check if the string consists only of space-separated closing
 * delimiters.  This is a bit of a dance: the first must be a close
 * delimiter, but it may be followed by middle delimiters.  Arbitrary
 * whitespace may separate these tokens.
 */
static int
args_checkpunct(const char *buf, int i)
{
	int		 j;
	char		 dbuf[DELIMSZ];
	enum mdelim	 d;

	/* First token must be a close-delimiter. */

	for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
		dbuf[j] = buf[i];

	if (DELIMSZ == j)
		return 0;

	dbuf[j] = '\0';
	if (DELIM_CLOSE != mdoc_isdelim(dbuf))
		return 0;

	while (' ' == buf[i])
		i++;

	/* Remaining must NOT be open/none. */

	while (buf[i]) {
		j = 0;
		while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
			dbuf[j++] = buf[i++];

		if (DELIMSZ == j)
			return 0;

		dbuf[j] = '\0';
		d = mdoc_isdelim(dbuf);
		if (DELIM_NONE == d || DELIM_OPEN == d)
			return 0;

		while (' ' == buf[i])
			i++;
	}

	return '\0' == buf[i];
}

static void
argv_multi(struct roff_man *mdoc, int line,
		struct mdoc_argv *v, int *pos, char *buf)
{
	enum margserr	 ac;
	char		*p;

	for (v->sz = 0; ; v->sz++) {
		if (buf[*pos] == '-')
			break;
		ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
		if (ac == ARGS_EOLN)
			break;

		if (v->sz % MULTI_STEP == 0)
			v->value = mandoc_reallocarray(v->value,
			    v->sz + MULTI_STEP, sizeof(char *));

		v->value[(int)v->sz] = mandoc_strdup(p);
	}
}

static void
argv_single(struct roff_man *mdoc, int line,
		struct mdoc_argv *v, int *pos, char *buf)
{
	enum margserr	 ac;
	char		*p;

	ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
	if (ac == ARGS_EOLN)
		return;

	v->sz = 1;
	v->value = mandoc_malloc(sizeof(char *));
	v->value[0] = mandoc_strdup(p);
}
OpenPOWER on IntegriCloud