libgetopt/getopt.h

/*	A getopt implementation with GNU extensions
	Copyright 2007-2015 PC GO Ld.

	This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
*/

#ifndef _GETOPT_H
#define _GETOPT_H

#ifdef __cplusplus
extern "C" {
#endif

extern char *optarg;		/* pointer to argument of current option  */

extern int optind;		/* index of first non-option in argv      */
extern int optopt;		/* single option character, as parsed     */
extern int opterr;		/* flag to enable built-in diagnostics... */
				/* (user may set to zero, to suppress)    */

struct option {
	const char *name;
	int has_arg;
	int *flag;
	int val;
};

#define no_argument 0
#define required_argument 1
#define optional_argument 2

extern int getopt(int, char *const *, const char *);
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 *);

#ifdef __cplusplus
}
#endif

#endif