OpenSolaris_b135/cmd/fmli/sys/estrtok.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/


/*
 * Copyright  (c) 1985 AT&T
 *	All Rights Reserved
 */
#ident	"%Z%%M%	%I%	%E% SMI"       /* SVr4.0 1.1 */

#include	<stdio.h>
#include	<string.h>

char *
estrtok(env, ptr, sep)
char	**env;
char	*ptr;
char	sep[];
{
	if (ptr == NULL)
		ptr = *env;
	else
		*env = ptr;
	if (ptr == NULL || *ptr == '\0')
		return NULL;
	ptr += strspn(ptr, sep);
	*env = ptr + strcspn(ptr, sep);
	if (**env != '\0') {
		**env = '\0';
		(*env)++;
	}
	return ptr;
}