getopt.h

#ifndef _GETOPT_H_
#define _GETOPT_H_

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus

int getopt(int argc, char *const argv[],
           const char *optstring);

extern char *optarg;
extern int optind, opterr, optopt;

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

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

int getopt_long(int argc, char *const argv[],
                const char *optstring,
                const struct option *longopts, int *longindex);
/****************************************************************************
    int getopt_long_only(int argc, char* const argv[],
            const char* optstring,
            const struct option* longopts, int* longindex);
****************************************************************************/
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // _GETOPT_H_