1/*	$NetBSD: getsubopt.c,v 1.4 1998/02/03 18:44:15 perry Exp $	*/
2
3/*-
4 * Copyright (c) 1990, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#if ((!defined(WIN32))&&(!defined(macintosh)))
37#include <sys/cdefs.h>
38#endif /* WIN32 */
39#if defined(LIBC_SCCS) && !defined(lint)
40#if 0
41static char sccsid[] = "@(#)getsubopt.c	8.1 (Berkeley) 6/4/93";
42#else
43__RCSID("$NetBSD: getsubopt.c,v 1.4 1998/02/03 18:44:15 perry Exp $");
44#endif
45#endif /* LIBC_SCCS and not lint */
46
47#include <stdlib.h>
48#include <string.h>
49#ifdef HAVE_UNISTD_H
50#include <unistd.h>
51#endif /* HAVE_UNISTD_H */
52#if (defined(WIN32)||(defined(macintosh)))
53#include "sasl.h"
54LIBSASL_API int getsubopt(char **optionp, char * const *tokens, char **valuep);
55#endif /* WIN32 */
56/*
57 * The SVID interface to getsubopt provides no way of figuring out which
58 * part of the suboptions list wasn't matched.  This makes error messages
59 * tricky...  The extern variable suboptarg is a pointer to the token
60 * which didn't match.
61 */
62char *suboptarg;
63
64int
65getsubopt(optionp, tokens, valuep)
66	char **optionp, **valuep;
67	char * const *tokens;
68{
69	int cnt;
70	char *p;
71
72	suboptarg = *valuep = NULL;
73
74	if (!optionp || !*optionp)
75		return(-1);
76
77	/* skip leading white-space, commas */
78	for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
79
80	if (!*p) {
81		*optionp = p;
82		return(-1);
83	}
84
85	/* save the start of the token, and skip the rest of the token. */
86	for (suboptarg = p;
87	    *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
88
89	if (*p) {
90		/*
91		 * If there's an equals sign, set the value pointer, and
92		 * skip over the value part of the token.  Terminate the
93		 * token.
94		 */
95		if (*p == '=') {
96			*p = '\0';
97			for (*valuep = ++p;
98			    *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
99			if (*p)
100				*p++ = '\0';
101		} else
102			*p++ = '\0';
103		/* Skip any whitespace or commas after this token. */
104		for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
105	}
106
107	/* set optionp for next round. */
108	*optionp = p;
109
110	for (cnt = 0; *tokens; ++tokens, ++cnt)
111		if (!strcmp(suboptarg, *tokens))
112			return(cnt);
113	return(-1);
114}
115