[apple/libc.git] / stdlib / FreeBSD / getsubopt.c

/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getsubopt.c	8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/stdlib/getsubopt.c,v 1.7 2007/01/09 00:28:10 imp Exp $");

#include <stdlib.h>
#include <string.h>

/*
 * The SVID interface to getsubopt provides no way of figuring out which
 * part of the suboptions list wasn't matched.  This makes error messages
 * tricky...  The extern variable suboptarg is a pointer to the token
 * which didn't match.
 */
char *suboptarg;

int
getsubopt(optionp, tokens, valuep)
	char **optionp, **valuep;
	char * const *tokens;
{
	int cnt;
	char *p;

	suboptarg = *valuep = NULL;

	if (!optionp || !*optionp)
		return(-1);

	/* skip leading white-space, commas */
	for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);

	if (!*p) {
		*optionp = p;
		return(-1);
	}

	/* save the start of the token, and skip the rest of the token. */
	for (suboptarg = p;
	    *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);

	if (*p) {
		/*
		 * If there's an equals sign, set the value pointer, and
		 * skip over the value part of the token.  Terminate the
		 * token.
		 */
		if (*p == '=') {
			*p = '\0';
			for (*valuep = ++p;
			    *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
			if (*p)
				*p++ = '\0';
		} else
			*p++ = '\0';
		/* Skip any whitespace or commas after this token. */
		for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
	}

	/* set optionp for next round. */
	*optionp = p;

	for (cnt = 0; *tokens; ++tokens, ++cnt)
		if (!strcmp(suboptarg, *tokens))
			return(cnt);
	return(-1);
}
Commit	Line	Data
9385eb3d	1	/*-
e9ce8d39 A	2	* Copyright (c) 1990, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
e9ce8d39 A	13	* 4. Neither the name of the University nor the names of its contributors
	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*/
	29
9385eb3d A	30	#if defined(LIBC_SCCS) && !defined(lint)
	31	static char sccsid[] = "@(#)getsubopt.c 8.1 (Berkeley) 6/4/93";
	32	#endif /* LIBC_SCCS and not lint */
	33	#include <sys/cdefs.h>
1f2f436a	34	__FBSDID("$FreeBSD: src/lib/libc/stdlib/getsubopt.c,v 1.7 2007/01/09 00:28:10 imp Exp $");
e9ce8d39	35
e9ce8d39	36	#include <stdlib.h>
9385eb3d	37	#include <string.h>
e9ce8d39 A	38
	39	/*
	40	* The SVID interface to getsubopt provides no way of figuring out which
	41	* part of the suboptions list wasn't matched. This makes error messages
	42	* tricky... The extern variable suboptarg is a pointer to the token
	43	* which didn't match.
	44	*/
	45	char *suboptarg;
	46
9385eb3d	47	int
e9ce8d39	48	getsubopt(optionp, tokens, valuep)
9385eb3d A	49	char optionp, valuep;
9385eb3d A	50	char * const *tokens;
e9ce8d39	51	{
9385eb3d A	52	int cnt;
9385eb3d A	53	char *p;
e9ce8d39 A	54
	55	suboptarg = *valuep = NULL;
	56
	57	if (!optionp \|\| !*optionp)
	58	return(-1);
	59
	60	/* skip leading white-space, commas */
	61	for (p = optionp; p && (p == ',' \|\| p == ' ' \|\| *p == '\t'); ++p);
	62
	63	if (!*p) {
	64	*optionp = p;
	65	return(-1);
	66	}
	67
	68	/* save the start of the token, and skip the rest of the token. */
	69	for (suboptarg = p;
	70	++p && p != ',' && p != '=' && p != ' ' && *p != '\t';);
	71
	72	if (*p) {
	73	/*
	74	* If there's an equals sign, set the value pointer, and
	75	* skip over the value part of the token. Terminate the
	76	* token.
	77	*/
	78	if (*p == '=') {
	79	*p = '\0';
	80	for (*valuep = ++p;
	81	p && p != ',' && p != ' ' && p != '\t'; ++p);
9385eb3d	82	if (*p)
e9ce8d39 A	83	*p++ = '\0';
	84	} else
	85	*p++ = '\0';
	86	/* Skip any whitespace or commas after this token. */
	87	for (; p && (p == ',' \|\| p == ' ' \|\| p == '\t'); ++p);
	88	}
	89
	90	/* set optionp for next round. */
	91	*optionp = p;
	92
	93	for (cnt = 0; *tokens; ++tokens, ++cnt)
	94	if (!strcmp(suboptarg, *tokens))
	95	return(cnt);
	96	return(-1);
	97	}