1/*	$NetBSD: bootconfig.c,v 1.2 2002/03/10 19:56:39 lukem Exp $	*/
2
3/*-
4 * Copyright (c) 1994-1998 Mark Brinicombe.
5 * Copyright (c) 1994 Brini.
6 * All rights reserved.
7 *
8 * This code is derived from software written for Brini by Mark Brinicombe
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by Mark Brinicombe
21 *	for the NetBSD Project.
22 * 4. The name of the company nor the name of the author may be used to
23 *    endorse or promote products derived from this software without specific
24 *    prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD$");
41
42#include <sys/param.h>
43
44#include <sys/systm.h>
45
46#include <machine/bootconfig.h>
47
48
49/*
50 * Function to identify and process different types of boot argument
51 */
52
53int
54get_bootconf_option(opts, opt, type, result)
55	char *opts;
56	char *opt;
57	int type;
58	void *result;
59{
60	char *ptr;
61	char *optstart;
62	int not;
63
64	ptr = opts;
65
66	while (*ptr) {
67		/* Find start of option */
68		while (*ptr == ' ' || *ptr == '\t')
69			++ptr;
70
71		if (*ptr == 0)
72			break;
73
74		not = 0;
75
76		/* Is it a negate option */
77		if ((type & BOOTOPT_TYPE_MASK) == BOOTOPT_TYPE_BOOLEAN && *ptr == '!') {
78			not = 1;
79			++ptr;
80		}
81
82		/* Find the end of option */
83		optstart = ptr;
84		while (*ptr != 0 && *ptr != ' ' && *ptr != '\t' && *ptr != '=')
85			++ptr;
86
87		if ((*ptr == '=')
88		    || (*ptr != '=' && ((type & BOOTOPT_TYPE_MASK) == BOOTOPT_TYPE_BOOLEAN))) {
89			/* compare the option */
90			if (strncmp(optstart, opt, (ptr - optstart)) == 0) {
91				/* found */
92
93				if (*ptr == '=')
94					++ptr;
95
96				switch(type & BOOTOPT_TYPE_MASK) {
97				case BOOTOPT_TYPE_BOOLEAN :
98					if (*(ptr - 1) == '=')
99						*((int *)result) = ((u_int)strtoul(ptr, NULL, 10) != 0);
100					else
101						*((int *)result) = !not;
102					break;
103				case BOOTOPT_TYPE_STRING :
104					*((char **)result) = ptr;
105					break;
106				case BOOTOPT_TYPE_INT :
107					*((int *)result) = (u_int)strtoul(ptr, NULL, 10);
108					break;
109				case BOOTOPT_TYPE_BININT :
110					*((int *)result) = (u_int)strtoul(ptr, NULL, 2);
111					break;
112				case BOOTOPT_TYPE_HEXINT :
113					*((int *)result) = (u_int)strtoul(ptr, NULL, 16);
114					break;
115				default:
116					return(0);
117				}
118				return(1);
119			}
120		}
121		/* skip to next option */
122		while (*ptr != ' ' && *ptr != '\t' && *ptr != 0)
123			++ptr;
124	}
125	return(0);
126}
127