roff_validate.c revision 1.7 
1/*	$OpenBSD: roff_validate.c,v 1.7 2017/06/06 15:00:56 schwarze Exp $ */
2/*
3 * Copyright (c) 2010, 2017 Ingo Schwarze <schwarze@openbsd.org>
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 <stddef.h>
21
22#include "mandoc.h"
23#include "roff.h"
24#include "libmandoc.h"
25#include "roff_int.h"
26
27#define	ROFF_VALID_ARGS struct roff_man *man, struct roff_node *n
28
29typedef	void	(*roff_valid_fp)(ROFF_VALID_ARGS);
30
31static	void	  roff_valid_ft(ROFF_VALID_ARGS);
32
33static	const roff_valid_fp roff_valids[ROFF_MAX] = {
34	NULL,  /* br */
35	NULL,  /* ce */
36	roff_valid_ft,  /* ft */
37	NULL,  /* ll */
38	NULL,  /* mc */
39	NULL,  /* sp */
40	NULL,  /* ta */
41	NULL,  /* ti */
42};
43
44
45void
46roff_validate(struct roff_man *man)
47{
48	struct roff_node	*n;
49
50	n = man->last;
51	assert(n->tok < ROFF_MAX);
52	if (roff_valids[n->tok] != NULL)
53		(*roff_valids[n->tok])(man, n);
54}
55
56static void
57roff_valid_ft(ROFF_VALID_ARGS)
58{
59	char	*cp;
60
61	if (n->child == NULL) {
62		man->next = ROFF_NEXT_CHILD;
63		roff_word_alloc(man, n->line, n->pos, "P");
64		man->last = n;
65		return;
66	}
67
68	cp = n->child->string;
69	switch (*cp) {
70	case '1':
71	case '2':
72	case '3':
73	case '4':
74	case 'I':
75	case 'P':
76	case 'R':
77		if (cp[1] == '\0')
78			return;
79		break;
80	case 'B':
81		if (cp[1] == '\0' || (cp[1] == 'I' && cp[2] == '\0'))
82			return;
83		break;
84	case 'C':
85		if (cp[1] == 'W' && cp[2] == '\0')
86			return;
87		break;
88	default:
89		break;
90	}
91
92	mandoc_vmsg(MANDOCERR_FT_BAD, man->parse,
93	    n->line, n->pos, "ft %s", cp);
94	roff_node_delete(man, n);
95}
96