opts.h

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#pragma once
 
 
#include <stdbool.h>
#include <inttypes.h>
 
typedef struct cr8r_opt cr8r_opt;
struct cr8r_opt {
    void *dest;
    bool found;
    int arg_mode;
    const char *short_name;
    const char *long_name;
    const char *description;
    bool (*on_opt)(cr8r_opt *self, char *opt);
    bool (*on_missing)(cr8r_opt *self);
};
 
typedef struct{
    void *data;
    uint64_t flags;
    bool (*on_arg)(void *data, int argc, char **argv, int i);
} cr8r_opt_cfg;
 
bool cr8r_opt_missing_optional(cr8r_opt *self);
 
bool cr8r_opt_print_help(cr8r_opt *self, char *opt);
 
bool cr8r_opt_set_enum_0(cr8r_opt *self, char *opt);
 
bool cr8r_opt_set_enum_1(cr8r_opt *self, char *opt);
 
bool cr8r_opt_ignore_arg(void *data, int argc, char **argv, int i);
 
bool cr8r_opt_parse(cr8r_opt *opts, cr8r_opt_cfg *cfg, int argc, char **argv);
 
bool cr8r_opt_parse_ull(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_ll(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_ul(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_l(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_u(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_i(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_us(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_s(cr8r_opt *self, char *opt);
 
bool cr8r_opt_parse_uc(cr8r_opt *self, char *opt);
 
bool cr8r_opt_parse_sc(cr8r_opt *self, char *opt);
 
bool cr8r_opt_parse_c(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_f(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_d(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_ld(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_cstr(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_b(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_i128(cr8r_opt *self, char *opt);
bool cr8r_opt_parse_u128(cr8r_opt *self, char *opt);
 
char *cr8r_sprint_i128(char buf[static 41], __int128 i);
 
char *cr8r_sprint_u128(char buf[static 40], unsigned __int128 i);
 
typedef enum{
    CR8R_OPT_ARGMODE_NONE = 0,
    CR8R_OPT_ARGMODE_REQUIRED = 1,
    CR8R_OPT_ARGMODE_OPTIONAL = 2
} cr8r_opt_argmode;
 
typedef enum{
    CR8R_OPTS_FATAL_ERRS = 1ull,
    CR8R_OPTS_ALLOW_STRAY_DASH = 2ull,
    CR8R_OPTS_CB_ON_DD = 4ull
} cr8r_opts_flags;
 
#define _CR8R_OPT_GENERIC_OPTFIELDS(_dest, _short_name, _long_name, _description)   .dest = (_dest),\
    .arg_mode = CR8R_OPT_ARGMODE_REQUIRED,                                     \
    .short_name = (_short_name),                                               \
    .long_name = (_long_name),                                                 \
    .description = (_description),                                             \
    .on_opt = _Generic(*(_dest),                                               \
    unsigned long long: cr8r_opt_parse_ull,                                    \
    long long: cr8r_opt_parse_ll,                                              \
    unsigned long: cr8r_opt_parse_ul,                                          \
    long: cr8r_opt_parse_l,                                                    \
    unsigned: cr8r_opt_parse_u,                                                \
    int: cr8r_opt_parse_i,                                                     \
    unsigned short: cr8r_opt_parse_us,                                         \
    short: cr8r_opt_parse_s,                                                   \
    unsigned char: cr8r_opt_parse_uc,                                          \
    signed char: cr8r_opt_parse_sc,                                            \
    char: cr8r_opt_parse_c,                                                    \
    float: cr8r_opt_parse_f,                                                   \
    double: cr8r_opt_parse_d,                                                  \
    long double: cr8r_opt_parse_ld,                                            \
    char*: cr8r_opt_parse_cstr,                                                \
    _Bool: cr8r_opt_parse_b,                                                   \
    __int128: cr8r_opt_parse_i128,                                             \
    unsigned __int128: cr8r_opt_parse_u128),
 
#define CR8R_OPT_GENERIC_OPTIONAL(_dest, _short_name, _long_name, _description) ((cr8r_opt){\
    _CR8R_OPT_GENERIC_OPTFIELDS((_dest),(_short_name), (_long_name), (_description))\
    .on_missing = cr8r_opt_missing_optional,})
 
#define CR8R_OPT_GENERIC_REQUIRED(_dest, _short_name, _long_name, _description) ((cr8r_opt){\
    _CR8R_OPT_GENERIC_OPTFIELDS((_dest), (_short_name), (_long_name), (_description))})
 
#define CR8R_OPT_ENUM_CASE(_dest, _num, _short_name, _long_name, _description) ((cr8r_opt){\
    .dest=(_dest), .arg_mode=CR8R_OPT_ARGMODE_NONE, .short_name=(_short_name), .long_name=(_long_name), .description=(_description), .on_opt=cr8r_opt_set_enum_##_num, .on_missing=cr8r_opt_missing_optional})
 
#define CR8R_OPT_HELP(_opts, _description) ((cr8r_opt){.dest=(_opts), .short_name="h", .long_name="help", .description=(_description), .on_opt=cr8r_opt_print_help, .on_missing=cr8r_opt_missing_optional})
 
#define CR8R_OPT_END() ((cr8r_opt){.short_name=NULL, .long_name=NULL})