util_arg.c   [plain text]

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2001,2007 Oracle.  All rights reserved.
 *
 * $Id: util_arg.c,v 12.6 2007/05/17 15:14:55 bostic Exp $
 */

#include "db_config.h"

#include "db_int.h"

static char *__db_strsep __P((char **, const char *));

/*
 * __db_util_arg --
 *	Convert a string into an argc/argv pair.
 *
 * PUBLIC: int __db_util_arg __P((char *, char *, int *, char ***));
 */
int
__db_util_arg(arg0, str, argcp, argvp)
	char *arg0, *str, ***argvp;
	int *argcp;
{
	int n, ret;
	char **ap, **argv;

#define	MAXARGS	25
	if ((ret =
	    __os_malloc(NULL, (MAXARGS + 1) * sizeof(char **), &argv)) != 0)
		return (ret);

	ap = argv;
	*ap++ = arg0;
	for (n = 1; (*ap = __db_strsep(&str, " \t")) != NULL;)
		if (**ap != '\0') {
			++ap;
			if (++n == MAXARGS)
				break;
		}
	*ap = NULL;

	*argcp = ap - argv;
	*argvp = argv;

	return (0);
}

/*-
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 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.
 */
/*
 * Get next token from string *stringp, where tokens are possibly-empty
 * strings separated by characters from delim.
 *
 * Writes NULs into the string at *stringp to end tokens.
 * delim need not remain constant from call to call.
 * On return, *stringp points past the last NUL written (if there might
 * be further tokens), or is NULL (if there are definitely no more tokens).
 *
 * If *stringp is NULL, strsep returns NULL.
 */
static char *
__db_strsep(stringp, delim)
	char **stringp;
	const char *delim;
{
	const char *spanp;
	int c, sc;
	char *s, *tok;

	if ((s = *stringp) == NULL)
		return (NULL);
	for (tok = s;;) {
		c = *s++;
		spanp = delim;
		do {
			if ((sc = *spanp++) == c) {
				if (c == 0)
					s = NULL;
				else
					s[-1] = 0;
				*stringp = s;
				return (tok);
			}
		} while (sc != 0);
	}
	/* NOTREACHED */
}