Bring in OpenBSD's mandoc(1) tool for formatting manual pages.
[dragonfly.git] / usr.bin / mandoc / mdoc_argv.c
... / ...
CommitLineData
1/* $Id: mdoc_argv.c,v 1.17 2009/10/21 19:13:50 schwarze Exp $ */
2/*
3 * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
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#include <sys/types.h>
18
19#include <assert.h>
20#include <ctype.h>
21#include <stdlib.h>
22#include <stdio.h>
23#include <string.h>
24
25#include "libmdoc.h"
26
27/*
28 * Routines to parse arguments of macros. Arguments follow the syntax
29 * of `-arg [val [valN...]]'. Arguments come in all types: quoted
30 * arguments, multiple arguments per value, no-value arguments, etc.
31 *
32 * There's no limit to the number or arguments that may be allocated.
33 */
34
35#define ARGV_NONE (1 << 0)
36#define ARGV_SINGLE (1 << 1)
37#define ARGV_MULTI (1 << 2)
38#define ARGV_OPT_SINGLE (1 << 3)
39
40#define MULTI_STEP 5
41
42static int argv_a2arg(int, const char *);
43static int args(struct mdoc *, int, int *,
44 char *, int, char **);
45static int argv(struct mdoc *, int,
46 struct mdoc_argv *, int *, char *);
47static int argv_single(struct mdoc *, int,
48 struct mdoc_argv *, int *, char *);
49static int argv_opt_single(struct mdoc *, int,
50 struct mdoc_argv *, int *, char *);
51static int argv_multi(struct mdoc *, int,
52 struct mdoc_argv *, int *, char *);
53
54/* Per-argument flags. */
55
56static int mdoc_argvflags[MDOC_ARG_MAX] = {
57 ARGV_NONE, /* MDOC_Split */
58 ARGV_NONE, /* MDOC_Nosplit */
59 ARGV_NONE, /* MDOC_Ragged */
60 ARGV_NONE, /* MDOC_Unfilled */
61 ARGV_NONE, /* MDOC_Literal */
62 ARGV_SINGLE, /* MDOC_File */
63 ARGV_OPT_SINGLE, /* MDOC_Offset */
64 ARGV_NONE, /* MDOC_Bullet */
65 ARGV_NONE, /* MDOC_Dash */
66 ARGV_NONE, /* MDOC_Hyphen */
67 ARGV_NONE, /* MDOC_Item */
68 ARGV_NONE, /* MDOC_Enum */
69 ARGV_NONE, /* MDOC_Tag */
70 ARGV_NONE, /* MDOC_Diag */
71 ARGV_NONE, /* MDOC_Hang */
72 ARGV_NONE, /* MDOC_Ohang */
73 ARGV_NONE, /* MDOC_Inset */
74 ARGV_MULTI, /* MDOC_Column */
75 ARGV_SINGLE, /* MDOC_Width */
76 ARGV_NONE, /* MDOC_Compact */
77 ARGV_NONE, /* MDOC_Std */
78 ARGV_NONE, /* MDOC_Filled */
79 ARGV_NONE, /* MDOC_Words */
80 ARGV_NONE, /* MDOC_Emphasis */
81 ARGV_NONE, /* MDOC_Symbolic */
82 ARGV_NONE /* MDOC_Symbolic */
83};
84
85static int mdoc_argflags[MDOC_MAX] = {
86 0, /* Ap */
87 0, /* Dd */
88 0, /* Dt */
89 0, /* Os */
90 0, /* Sh */
91 0, /* Ss */
92 ARGS_DELIM, /* Pp */
93 ARGS_DELIM, /* D1 */
94 ARGS_DELIM, /* Dl */
95 0, /* Bd */
96 0, /* Ed */
97 0, /* Bl */
98 0, /* El */
99 0, /* It */
100 ARGS_DELIM, /* Ad */
101 ARGS_DELIM, /* An */
102 ARGS_DELIM, /* Ar */
103 0, /* Cd */
104 ARGS_DELIM, /* Cm */
105 ARGS_DELIM, /* Dv */
106 ARGS_DELIM, /* Er */
107 ARGS_DELIM, /* Ev */
108 0, /* Ex */
109 ARGS_DELIM, /* Fa */
110 0, /* Fd */
111 ARGS_DELIM, /* Fl */
112 ARGS_DELIM, /* Fn */
113 ARGS_DELIM, /* Ft */
114 ARGS_DELIM, /* Ic */
115 0, /* In */
116 ARGS_DELIM, /* Li */
117 0, /* Nd */
118 ARGS_DELIM, /* Nm */
119 ARGS_DELIM, /* Op */
120 0, /* Ot */
121 ARGS_DELIM, /* Pa */
122 0, /* Rv */
123 ARGS_DELIM, /* St */
124 ARGS_DELIM, /* Va */
125 ARGS_DELIM, /* Vt */
126 ARGS_DELIM, /* Xr */
127 0, /* %A */
128 0, /* %B */
129 0, /* %D */
130 0, /* %I */
131 0, /* %J */
132 0, /* %N */
133 0, /* %O */
134 0, /* %P */
135 0, /* %R */
136 0, /* %T */
137 0, /* %V */
138 ARGS_DELIM, /* Ac */
139 0, /* Ao */
140 ARGS_DELIM, /* Aq */
141 ARGS_DELIM, /* At */
142 ARGS_DELIM, /* Bc */
143 0, /* Bf */
144 0, /* Bo */
145 ARGS_DELIM, /* Bq */
146 ARGS_DELIM, /* Bsx */
147 ARGS_DELIM, /* Bx */
148 0, /* Db */
149 ARGS_DELIM, /* Dc */
150 0, /* Do */
151 ARGS_DELIM, /* Dq */
152 ARGS_DELIM, /* Ec */
153 0, /* Ef */
154 ARGS_DELIM, /* Em */
155 0, /* Eo */
156 ARGS_DELIM, /* Fx */
157 ARGS_DELIM, /* Ms */
158 ARGS_DELIM, /* No */
159 ARGS_DELIM, /* Ns */
160 ARGS_DELIM, /* Nx */
161 ARGS_DELIM, /* Ox */
162 ARGS_DELIM, /* Pc */
163 ARGS_DELIM, /* Pf */
164 0, /* Po */
165 ARGS_DELIM, /* Pq */
166 ARGS_DELIM, /* Qc */
167 ARGS_DELIM, /* Ql */
168 0, /* Qo */
169 ARGS_DELIM, /* Qq */
170 0, /* Re */
171 0, /* Rs */
172 ARGS_DELIM, /* Sc */
173 0, /* So */
174 ARGS_DELIM, /* Sq */
175 0, /* Sm */
176 ARGS_DELIM, /* Sx */
177 ARGS_DELIM, /* Sy */
178 ARGS_DELIM, /* Tn */
179 ARGS_DELIM, /* Ux */
180 ARGS_DELIM, /* Xc */
181 0, /* Xo */
182 0, /* Fo */
183 0, /* Fc */
184 0, /* Oo */
185 ARGS_DELIM, /* Oc */
186 0, /* Bk */
187 0, /* Ek */
188 0, /* Bt */
189 0, /* Hf */
190 0, /* Fr */
191 0, /* Ud */
192 0, /* Lb */
193 ARGS_DELIM, /* Lp */
194 ARGS_DELIM, /* Lk */
195 ARGS_DELIM, /* Mt */
196 ARGS_DELIM, /* Brq */
197 0, /* Bro */
198 ARGS_DELIM, /* Brc */
199 0, /* %C */
200 0, /* Es */
201 0, /* En */
202 0, /* Dx */
203 0, /* %Q */
204 0, /* br */
205 0, /* sp */
206};
207
208
209/*
210 * Parse an argument from line text. This comes in the form of -key
211 * [value0...], which may either have a single mandatory value, at least
212 * one mandatory value, an optional single value, or no value.
213 */
214int
215mdoc_argv(struct mdoc *m, int line, int tok,
216 struct mdoc_arg **v, int *pos, char *buf)
217{
218 char *p, sv;
219 struct mdoc_argv tmp;
220 struct mdoc_arg *arg;
221
222 if (0 == buf[*pos])
223 return(ARGV_EOLN);
224
225 assert(' ' != buf[*pos]);
226
227 /* Parse through to the first unescaped space. */
228
229 p = &buf[++(*pos)];
230
231 assert(*pos > 0);
232
233 /* LINTED */
234 while (buf[*pos]) {
235 if (' ' == buf[*pos])
236 if ('\\' != buf[*pos - 1])
237 break;
238 (*pos)++;
239 }
240
241 /* XXX - save zeroed byte, if not an argument. */
242
243 sv = 0;
244 if (buf[*pos]) {
245 sv = buf[*pos];
246 buf[(*pos)++] = 0;
247 }
248
249 (void)memset(&tmp, 0, sizeof(struct mdoc_argv));
250 tmp.line = line;
251 tmp.pos = *pos;
252
253 /* See if our token accepts the argument. */
254
255 if (MDOC_ARG_MAX == (tmp.arg = argv_a2arg(tok, p))) {
256 /* XXX - restore saved zeroed byte. */
257 if (sv)
258 buf[*pos - 1] = sv;
259 return(ARGV_WORD);
260 }
261
262 while (buf[*pos] && ' ' == buf[*pos])
263 (*pos)++;
264
265 if ( ! argv(m, line, &tmp, pos, buf))
266 return(ARGV_ERROR);
267
268 if (NULL == (arg = *v)) {
269 *v = calloc(1, sizeof(struct mdoc_arg));
270 if (NULL == *v) {
271 (void)mdoc_nerr(m, m->last, EMALLOC);
272 return(ARGV_ERROR);
273 }
274 arg = *v;
275 }
276
277 arg->argc++;
278 arg->argv = realloc(arg->argv, arg->argc *
279 sizeof(struct mdoc_argv));
280
281 if (NULL == arg->argv) {
282 (void)mdoc_nerr(m, m->last, EMALLOC);
283 return(ARGV_ERROR);
284 }
285
286 (void)memcpy(&arg->argv[(int)arg->argc - 1],
287 &tmp, sizeof(struct mdoc_argv));
288
289 return(ARGV_ARG);
290}
291
292
293void
294mdoc_argv_free(struct mdoc_arg *p)
295{
296 int i, j;
297
298 if (NULL == p)
299 return;
300
301 if (p->refcnt) {
302 --(p->refcnt);
303 if (p->refcnt)
304 return;
305 }
306 assert(p->argc);
307
308 /* LINTED */
309 for (i = 0; i < (int)p->argc; i++) {
310 if (0 == p->argv[i].sz)
311 continue;
312 if (NULL == p->argv[i].value)
313 continue;
314
315 /* LINTED */
316 for (j = 0; j < (int)p->argv[i].sz; j++)
317 if (p->argv[i].value[j])
318 free(p->argv[i].value[j]);
319
320 free(p->argv[i].value);
321 }
322
323 free(p->argv);
324 free(p);
325}
326
327
328int
329mdoc_zargs(struct mdoc *m, int line, int *pos,
330 char *buf, int flags, char **v)
331{
332
333 return(args(m, line, pos, buf, flags, v));
334}
335
336
337int
338mdoc_args(struct mdoc *m, int line,
339 int *pos, char *buf, int tok, char **v)
340{
341 int fl, c, i;
342 struct mdoc_node *n;
343
344 fl = (0 == tok) ? 0 : mdoc_argflags[tok];
345
346 if (MDOC_It != tok)
347 return(args(m, line, pos, buf, fl, v));
348
349 /*
350 * The `It' macro is a special case, as it acquires parameters from its
351 * parent `Bl' context, specifically, we're concerned with -column.
352 */
353
354 for (n = m->last; n; n = n->parent)
355 if (MDOC_BLOCK == n->type && MDOC_Bl == n->tok)
356 break;
357
358 assert(n);
359 c = (int)(n->args ? n->args->argc : 0);
360 assert(c > 0);
361
362 /* LINTED */
363 for (i = 0; i < c; i++) {
364 if (MDOC_Column != n->args->argv[i].arg)
365 continue;
366 fl |= ARGS_TABSEP;
367 fl &= ~ARGS_DELIM;
368 break;
369 }
370
371 return(args(m, line, pos, buf, fl, v));
372}
373
374
375static int
376args(struct mdoc *m, int line, int *pos,
377 char *buf, int fl, char **v)
378{
379 int i;
380 char *p, *pp;
381
382 /*
383 * Parse out the terms (like `val' in `.Xx -arg val' or simply
384 * `.Xx val'), which can have all sorts of properties:
385 *
386 * ARGS_DELIM: use special handling if encountering trailing
387 * delimiters in the form of [[::delim::][ ]+]+.
388 *
389 * ARGS_NOWARN: don't post warnings. This is only used when
390 * re-parsing delimiters, as the warnings have already been
391 * posted.
392 *
393 * ARGS_TABSEP: use special handling for tab/`Ta' separated
394 * phrases like in `Bl -column'.
395 */
396
397 assert(*pos);
398 assert(' ' != buf[*pos]);
399
400 if (0 == buf[*pos])
401 return(ARGS_EOLN);
402
403 /*
404 * If the first character is a delimiter and we're to look for
405 * delimited strings, then pass down the buffer seeing if it
406 * follows the pattern of [[::delim::][ ]+]+.
407 */
408
409 if ((fl & ARGS_DELIM) && mdoc_iscdelim(buf[*pos])) {
410 for (i = *pos; buf[i]; ) {
411 if ( ! mdoc_iscdelim(buf[i]))
412 break;
413 i++;
414 if (0 == buf[i] || ' ' != buf[i])
415 break;
416 i++;
417 while (buf[i] && ' ' == buf[i])
418 i++;
419 }
420
421 if (0 == buf[i]) {
422 *v = &buf[*pos];
423 if (' ' != buf[i - 1])
424 return(ARGS_PUNCT);
425 if (ARGS_NOWARN & fl)
426 return(ARGS_PUNCT);
427 if ( ! mdoc_pwarn(m, line, *pos, ETAILWS))
428 return(ARGS_ERROR);
429 return(ARGS_PUNCT);
430 }
431 }
432
433 *v = &buf[*pos];
434
435 /*
436 * First handle TABSEP items, restricted to `Bl -column'. This
437 * ignores conventional token parsing and instead uses tabs or
438 * `Ta' macros to separate phrases. Phrases are parsed again
439 * for arguments at a later phase.
440 */
441
442 if (ARGS_TABSEP & fl) {
443 /* Scan ahead to tab (can't be escaped). */
444 p = strchr(*v, '\t');
445
446 /* Scan ahead to unescaped `Ta'. */
447 for (pp = *v; ; pp++) {
448 if (NULL == (pp = strstr(pp, "Ta")))
449 break;
450 if (pp > *v && ' ' != *(pp - 1))
451 continue;
452 if (' ' == *(pp + 2) || 0 == *(pp + 2))
453 break;
454 }
455
456 /*
457 * Adjust new-buffer position to be beyond delimiter
458 * mark (e.g., Ta -> end + 2).
459 */
460 if (p && pp) {
461 *pos += pp < p ? 2 : 1;
462 p = pp < p ? pp : p;
463 } else if (p && ! pp) {
464 *pos += 1;
465 } else if (pp && ! p) {
466 p = pp;
467 *pos += 2;
468 } else
469 p = strchr(*v, 0);
470
471 /* Whitespace check for eoln case... */
472 if (0 == *p && ' ' == *(p - 1) && ! (ARGS_NOWARN & fl))
473 if ( ! mdoc_pwarn(m, line, *pos, ETAILWS))
474 return(ARGS_ERROR);
475
476 *pos += (int)(p - *v);
477
478 /* Strip delimiter's preceding whitespace. */
479 pp = p - 1;
480 while (pp > *v && ' ' == *pp) {
481 if (pp > *v && '\\' == *(pp - 1))
482 break;
483 pp--;
484 }
485 *(pp + 1) = 0;
486
487 /* Strip delimiter's proceeding whitespace. */
488 for (pp = &buf[*pos]; ' ' == *pp; pp++, (*pos)++)
489 /* Skip ahead. */ ;
490
491 return(ARGS_PHRASE);
492 }
493
494 /*
495 * Process a quoted literal. A quote begins with a double-quote
496 * and ends with a double-quote NOT preceded by a double-quote.
497 * Whitespace is NOT involved in literal termination.
498 */
499
500 if ('\"' == buf[*pos]) {
501 *v = &buf[++(*pos)];
502
503 for ( ; buf[*pos]; (*pos)++) {
504 if ('\"' != buf[*pos])
505 continue;
506 if ('\"' != buf[*pos + 1])
507 break;
508 (*pos)++;
509 }
510
511 if (0 == buf[*pos]) {
512 if (ARGS_NOWARN & fl)
513 return(ARGS_QWORD);
514 if ( ! mdoc_pwarn(m, line, *pos, EQUOTTERM))
515 return(ARGS_ERROR);
516 return(ARGS_QWORD);
517 }
518
519 buf[(*pos)++] = 0;
520
521 if (0 == buf[*pos])
522 return(ARGS_QWORD);
523
524 while (' ' == buf[*pos])
525 (*pos)++;
526
527 if (0 == buf[*pos] && ! (ARGS_NOWARN & fl))
528 if ( ! mdoc_pwarn(m, line, *pos, ETAILWS))
529 return(ARGS_ERROR);
530
531 return(ARGS_QWORD);
532 }
533
534 /*
535 * A non-quoted term progresses until either the end of line or
536 * a non-escaped whitespace.
537 */
538
539 for ( ; buf[*pos]; (*pos)++)
540 if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
541 break;
542
543 if (0 == buf[*pos])
544 return(ARGS_WORD);
545
546 buf[(*pos)++] = 0;
547
548 while (' ' == buf[*pos])
549 (*pos)++;
550
551 if (0 == buf[*pos] && ! (ARGS_NOWARN & fl))
552 if ( ! mdoc_pwarn(m, line, *pos, ETAILWS))
553 return(ARGS_ERROR);
554
555 return(ARGS_WORD);
556}
557
558
559static int
560argv_a2arg(int tok, const char *p)
561{
562
563 /*
564 * Parse an argument identifier from its text. XXX - this
565 * should really be table-driven to clarify the code.
566 *
567 * If you add an argument to the list, make sure that you
568 * register it here with its one or more macros!
569 */
570
571 switch (tok) {
572 case (MDOC_An):
573 if (0 == strcmp(p, "split"))
574 return(MDOC_Split);
575 else if (0 == strcmp(p, "nosplit"))
576 return(MDOC_Nosplit);
577 break;
578
579 case (MDOC_Bd):
580 if (0 == strcmp(p, "ragged"))
581 return(MDOC_Ragged);
582 else if (0 == strcmp(p, "unfilled"))
583 return(MDOC_Unfilled);
584 else if (0 == strcmp(p, "filled"))
585 return(MDOC_Filled);
586 else if (0 == strcmp(p, "literal"))
587 return(MDOC_Literal);
588 else if (0 == strcmp(p, "file"))
589 return(MDOC_File);
590 else if (0 == strcmp(p, "offset"))
591 return(MDOC_Offset);
592 else if (0 == strcmp(p, "compact"))
593 return(MDOC_Compact);
594 else if (0 == strcmp(p, "centered"))
595 return(MDOC_Centred);
596 break;
597
598 case (MDOC_Bf):
599 if (0 == strcmp(p, "emphasis"))
600 return(MDOC_Emphasis);
601 else if (0 == strcmp(p, "literal"))
602 return(MDOC_Literal);
603 else if (0 == strcmp(p, "symbolic"))
604 return(MDOC_Symbolic);
605 break;
606
607 case (MDOC_Bk):
608 if (0 == strcmp(p, "words"))
609 return(MDOC_Words);
610 break;
611
612 case (MDOC_Bl):
613 if (0 == strcmp(p, "bullet"))
614 return(MDOC_Bullet);
615 else if (0 == strcmp(p, "dash"))
616 return(MDOC_Dash);
617 else if (0 == strcmp(p, "hyphen"))
618 return(MDOC_Hyphen);
619 else if (0 == strcmp(p, "item"))
620 return(MDOC_Item);
621 else if (0 == strcmp(p, "enum"))
622 return(MDOC_Enum);
623 else if (0 == strcmp(p, "tag"))
624 return(MDOC_Tag);
625 else if (0 == strcmp(p, "diag"))
626 return(MDOC_Diag);
627 else if (0 == strcmp(p, "hang"))
628 return(MDOC_Hang);
629 else if (0 == strcmp(p, "ohang"))
630 return(MDOC_Ohang);
631 else if (0 == strcmp(p, "inset"))
632 return(MDOC_Inset);
633 else if (0 == strcmp(p, "column"))
634 return(MDOC_Column);
635 else if (0 == strcmp(p, "width"))
636 return(MDOC_Width);
637 else if (0 == strcmp(p, "offset"))
638 return(MDOC_Offset);
639 else if (0 == strcmp(p, "compact"))
640 return(MDOC_Compact);
641 else if (0 == strcmp(p, "nested"))
642 return(MDOC_Nested);
643 break;
644
645 case (MDOC_Rv):
646 /* FALLTHROUGH */
647 case (MDOC_Ex):
648 if (0 == strcmp(p, "std"))
649 return(MDOC_Std);
650 break;
651 default:
652 break;
653 }
654
655 return(MDOC_ARG_MAX);
656}
657
658
659static int
660argv_multi(struct mdoc *m, int line,
661 struct mdoc_argv *v, int *pos, char *buf)
662{
663 int c;
664 char *p;
665
666 for (v->sz = 0; ; v->sz++) {
667 if ('-' == buf[*pos])
668 break;
669 c = args(m, line, pos, buf, 0, &p);
670 if (ARGS_ERROR == c)
671 return(0);
672 else if (ARGS_EOLN == c)
673 break;
674
675 if (0 == v->sz % MULTI_STEP) {
676 v->value = realloc(v->value,
677 (v->sz + MULTI_STEP) * sizeof(char *));
678 if (NULL == v->value) {
679 (void)mdoc_nerr(m, m->last, EMALLOC);
680 return(ARGV_ERROR);
681 }
682 }
683 if (NULL == (v->value[(int)v->sz] = strdup(p)))
684 return(mdoc_nerr(m, m->last, EMALLOC));
685 }
686
687 return(1);
688}
689
690
691static int
692argv_opt_single(struct mdoc *m, int line,
693 struct mdoc_argv *v, int *pos, char *buf)
694{
695 int c;
696 char *p;
697
698 if ('-' == buf[*pos])
699 return(1);
700
701 c = args(m, line, pos, buf, 0, &p);
702 if (ARGS_ERROR == c)
703 return(0);
704 if (ARGS_EOLN == c)
705 return(1);
706
707 v->sz = 1;
708 if (NULL == (v->value = calloc(1, sizeof(char *))))
709 return(mdoc_nerr(m, m->last, EMALLOC));
710 if (NULL == (v->value[0] = strdup(p)))
711 return(mdoc_nerr(m, m->last, EMALLOC));
712
713 return(1);
714}
715
716
717/*
718 * Parse a single, mandatory value from the stream.
719 */
720static int
721argv_single(struct mdoc *m, int line,
722 struct mdoc_argv *v, int *pos, char *buf)
723{
724 int c, ppos;
725 char *p;
726
727 ppos = *pos;
728
729 c = args(m, line, pos, buf, 0, &p);
730 if (ARGS_ERROR == c)
731 return(0);
732 if (ARGS_EOLN == c)
733 return(mdoc_perr(m, line, ppos, EARGVAL));
734
735 v->sz = 1;
736 if (NULL == (v->value = calloc(1, sizeof(char *))))
737 return(mdoc_nerr(m, m->last, EMALLOC));
738 if (NULL == (v->value[0] = strdup(p)))
739 return(mdoc_nerr(m, m->last, EMALLOC));
740
741 return(1);
742}
743
744
745/*
746 * Determine rules for parsing arguments. Arguments can either accept
747 * no parameters, an optional single parameter, one parameter, or
748 * multiple parameters.
749 */
750static int
751argv(struct mdoc *mdoc, int line,
752 struct mdoc_argv *v, int *pos, char *buf)
753{
754
755 v->sz = 0;
756 v->value = NULL;
757
758 switch (mdoc_argvflags[v->arg]) {
759 case (ARGV_SINGLE):
760 return(argv_single(mdoc, line, v, pos, buf));
761 case (ARGV_MULTI):
762 return(argv_multi(mdoc, line, v, pos, buf));
763 case (ARGV_OPT_SINGLE):
764 return(argv_opt_single(mdoc, line, v, pos, buf));
765 default:
766 /* ARGV_NONE */
767 break;
768 }
769
770 return(1);
771}