/*
 * 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 2014 Garrett D'Amore <garrett@damore.org>
 *
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright 2020 Joyent Inc.
 */

/*
 * GNU-like getopt_long(), getopt_long_only().
 * Solaris-specific getopt_clip().
 */

#ifndef _GETOPT_H
#define _GETOPT_H

#ifdef  __cplusplus
extern "C" {
#endif


/*
 * Values for has_arg field.
 *
 * optional_argument is not supported by getopt_clip()
 */
#define no_argument             0
#define required_argument       1
#define optional_argument       2

struct option {
        const char *name;       /* name of long option */
        int has_arg;            /* whether option takes an argument */
        int *flag;              /* if not NULL, set *flag to val when option */
                                /* found */
        int val;                /* if flag is not NULL, value to set *flag */
                                /* to. */
                                /* if flag is NULL, return value */
};

/*
 * External variables used by these routines.
 */
extern char *optarg;
extern int  opterr;
extern int  optind;
extern int  optopt;

/*
 * The use of getopt_long_only in new development is strongly discouraged.
 */
extern int      getopt_long(int, char * const *, const char *,
                    const struct option *, int *);
extern int      getopt_long_only(int, char * const *, const char *,
                    const struct option *, int *);
extern int      getopt_clip(int, char * const *, const char *,
                    const struct option *, int *);

#ifdef __cplusplus
}
#endif

#endif  /* _GETOPT_H */