1/*	$Id: tbl_opts.c,v 1.24 2018/12/14 05:18:03 schwarze Exp $ */
2/*
3 * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2015 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 AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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 "config.h"
19
20#include <sys/types.h>
21
22#include <ctype.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26
27#include "mandoc.h"
28#include "tbl.h"
29#include "libmandoc.h"
30#include "tbl_int.h"
31
32#define	KEY_DPOINT	0
33#define	KEY_DELIM	1
34#define	KEY_LINESIZE	2
35#define	KEY_TAB		3
36
37struct	tbl_phrase {
38	const char	*name;
39	int		 key;
40};
41
42static	const struct tbl_phrase keys[] = {
43	{"decimalpoint", 0},
44	{"delim",	 0},
45	{"linesize",	 0},
46	{"tab",		 0},
47	{"allbox",	 TBL_OPT_ALLBOX | TBL_OPT_BOX},
48	{"box",		 TBL_OPT_BOX},
49	{"frame",	 TBL_OPT_BOX},
50	{"center",	 TBL_OPT_CENTRE},
51	{"centre",	 TBL_OPT_CENTRE},
52	{"doublebox",	 TBL_OPT_DBOX},
53	{"doubleframe",  TBL_OPT_DBOX},
54	{"expand",	 TBL_OPT_EXPAND},
55	{"nokeep",	 TBL_OPT_NOKEEP},
56	{"nospaces",	 TBL_OPT_NOSPACE},
57	{"nowarn",	 TBL_OPT_NOWARN},
58};
59
60#define KEY_MAXKEYS ((int)(sizeof(keys)/sizeof(keys[0])))
61
62static	void	 arg(struct tbl_node *, int, const char *, int *, int);
63
64
65static void
66arg(struct tbl_node *tbl, int ln, const char *p, int *pos, int key)
67{
68	int		 len, want;
69
70	while (p[*pos] == ' ' || p[*pos] == '\t')
71		(*pos)++;
72
73	/* Arguments are enclosed in parentheses. */
74
75	len = 0;
76	if (p[*pos] == '(') {
77		(*pos)++;
78		while (p[*pos + len] != ')')
79			len++;
80	}
81
82	switch (key) {
83	case KEY_DELIM:
84		mandoc_msg(MANDOCERR_TBLOPT_EQN,
85		    ln, *pos, "%.*s", len, p + *pos);
86		want = 2;
87		break;
88	case KEY_TAB:
89		want = 1;
90		if (len == want)
91			tbl->opts.tab = p[*pos];
92		break;
93	case KEY_LINESIZE:
94		want = 0;
95		break;
96	case KEY_DPOINT:
97		want = 1;
98		if (len == want)
99			tbl->opts.decimal = p[*pos];
100		break;
101	default:
102		abort();
103	}
104
105	if (len == 0)
106		mandoc_msg(MANDOCERR_TBLOPT_NOARG, ln, *pos,
107		    "%s", keys[key].name);
108	else if (want && len != want)
109		mandoc_msg(MANDOCERR_TBLOPT_ARGSZ, ln, *pos,
110		    "%s want %d have %d", keys[key].name, want, len);
111
112	*pos += len;
113	if (p[*pos] == ')')
114		(*pos)++;
115}
116
117/*
118 * Parse one line of options up to the semicolon.
119 * Each option can be preceded by blanks and/or commas,
120 * and some options are followed by arguments.
121 */
122void
123tbl_option(struct tbl_node *tbl, int ln, const char *p, int *offs)
124{
125	int		 i, pos, len;
126
127	pos = *offs;
128	for (;;) {
129		while (p[pos] == ' ' || p[pos] == '\t' || p[pos] == ',')
130			pos++;
131
132		if (p[pos] == ';') {
133			*offs = pos + 1;
134			return;
135		}
136
137		/* Parse one option name. */
138
139		len = 0;
140		while (isalpha((unsigned char)p[pos + len]))
141			len++;
142
143		if (len == 0) {
144			mandoc_msg(MANDOCERR_TBLOPT_ALPHA,
145			    ln, pos, "%c", p[pos]);
146			pos++;
147			continue;
148		}
149
150		/* Look up the option name. */
151
152		i = 0;
153		while (i < KEY_MAXKEYS &&
154		    (strncasecmp(p + pos, keys[i].name, len) ||
155		     keys[i].name[len] != '\0'))
156			i++;
157
158		if (i == KEY_MAXKEYS) {
159			mandoc_msg(MANDOCERR_TBLOPT_BAD,
160			    ln, pos, "%.*s", len, p + pos);
161			pos += len;
162			continue;
163		}
164
165		/* Handle the option. */
166
167		pos += len;
168		if (keys[i].key)
169			tbl->opts.opts |= keys[i].key;
170		else
171			arg(tbl, ln, p, &pos, i);
172	}
173}
174