arg.h

/*
 * Copy me if you can.
 * by 20h
 */

#ifndef ARG_H__
#define ARG_H__

extern char *argv0;

/* use main(int argc, char *argv[]) */
#define ARGBEGIN                                     \
    for (argv0 = *argv, argv++, argc--;              \
         argv[0] && argv[0][0] == '-' && argv[0][1]; \
         argc--, argv++)                             \
    {                                                \
        char argc_;                                  \
        char **argv_;                                \
        int brk_;                                    \
        if (argv[0][1] == '-' && argv[0][2] == '\0') \
        {                                            \
            argv++;                                  \
            argc--;                                  \
            break;                                   \
        }                                            \
        for (brk_ = 0, argv[0]++, argv_ = argv;      \
             argv[0][0] && !brk_;                    \
             argv[0]++)                              \
        {                                            \
            if (argv_ != argv)                       \
                break;                               \
            argc_ = argv[0][0];                      \
            switch (argc_)

#define ARGEND \
    }          \
    }

#define ARGC() argc_

#define EARGF(x) ((argv[0][1] == '\0' && argv[1] == NULL) ? ((x), abort(), (char *)0) : (brk_ = 1, (argv[0][1] != '\0') ? (&argv[0][1]) : (argc--, argv++, argv[0])))

#define ARGF() ((argv[0][1] == '\0' && argv[1] == NULL) ? (char *)0 : (brk_ = 1, (argv[0][1] != '\0') ? (&argv[0][1]) : (argc--, argv++, argv[0])))

#endif