argsparse/argsparse.h

/*
 * argsparse.h
 * 
 * Copyright 2026 
 * 
 * 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.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 * 
 * 
 */

#if (!defined(__LIB_argsparse_H_))
#define __LIB_argsparse_H_

#define ArgsGetSimpleFlags() simple_flags
#define ArgsGetNamesVals() names_vals
#define ArgsGetNamesFlags() names_flags
#define ArgsGetDefault() default_arg
#define ArgsGetSimpleSize() simple_size
#define ArgsGetNamesSize() names_size
#define ArgsGetSimpleNumbers() options_numbers_simple
#define ArgsGetNamesNumbers() options_numbers_names

typedef struct {
    char** simple_flags;
    char** names_vals;
    char** names_flags;
    char* default_arg;
    size_t* options_numbers_simple;
    size_t* options_numbers_names;
    size_t simple_size;
    size_t names_size;
} __args_parse_t;

int _lib_argparse_emulated_main(__args_parse_t* arg_list_named);

__args_parse_t __sfdgssg_parse_result;

#define arg_property_t char*

/* Simulate array type */
#define args_config_t
#define args_config_size_t (size_t)

/* Macro for parsing the arguments of the main function */
#define __arglist(arg_list_named, conf, size) {                   \
    __sfdgssg_parse_result.ArgsGetDefault() = NULL;               \
    __sfdgssg_parse_result.ArgsGetSimpleNumbers() = NULL;         \
    __sfdgssg_parse_result.ArgsGetNamesNumbers() = NULL;          \
    _lib_argsparse_main(__argc__, __argv__, (conf), (size));      \
    int stat = _lib_argparse_emulated_main(                       \
        &__sfdgssg_parse_result);                                 \
    size_t __flags = __conf_flags_size((conf), (size));           \
    __free_string_array(                                          \
        __sfdgssg_parse_result.ArgsGetSimpleFlags(),              \
        __flags);                                                 \
    __free_string_array(                                          \
        __sfdgssg_parse_result.ArgsGetNamesFlags(),               \
        (size) - __flags);                                        \
    __free_string_array(                                          \
        __sfdgssg_parse_result.ArgsGetNamesVals(),                \
        (size) - __flags);                                        \
    free(__sfdgssg_parse_result.ArgsGetDefault());                \
    free(__sfdgssg_parse_result.ArgsGetSimpleNumbers());          \
    free(__sfdgssg_parse_result.ArgsGetNamesNumbers());           \
    return stat;                                                  \
}                                                                 \
int _lib_argparse_emulated_main(__args_parse_t* arg_list_named) 

/* Data type instead of argc and argv in the main function */
#define args_t int __argc__, char** __argv__) __arglist(

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

size_t __conf_flags_size(char** conf, size_t size) {
    unsigned int d = 0;
    size_t s = 0;
    while (d < size) {
        if (strchr(conf[d], '=') == NULL) {
            s ++;
        }
        d ++;
    }
    return s;
}

void __free_string_array(char** arr, size_t size) {
    unsigned int d = 0;
    while (d < size) {
        free(arr[d]);
        d ++;
    }
    free(arr);
}

static void* __sized_malloc(size_t size) {
    void* ptr = malloc(size);
    memset(ptr, ((int)(unsigned long)NULL), size);
    return ptr;
}

static unsigned char __compile_and_equals_sflag(char* flags, char* str) {
    if (strlen(str) > strlen(flags)) return 0;
    size_t i = 0;
    size_t slashes = 0;
    while (i < strlen(flags)) {
        if (flags[i] == '/') {
            slashes ++;
        }
        i ++;
    }
    i = 0;
    size_t f = 0;
    while (f < (slashes + 1)) {
        char st[32];
        size_t d = i;
        char* slt = &flags[i];
        while (flags[d] != '/' && flags[d] != '=' && flags[d] != '\0') {
            d ++;
        }
        strncpy(st, slt, d - i);
        st[d - i] = '\0';
        i = d + 1;
        f ++;
        if (strncmp(st, str, strlen(st)) == 0) {
            return 1;
        }
    }
    return 0;
}

static void* malloc_str(char* str) {
    char* ptr = malloc((strlen(str)) * sizeof(char) + sizeof(char));
    strcpy(ptr, str);
    return ptr;
}

int _lib_argsparse_main(int argc, char** argv, char** config, size_t size) {
    int i = 1;
    size_t flags = __conf_flags_size(config, size);
    __sfdgssg_parse_result.ArgsGetSimpleFlags() = 
                __sized_malloc((flags) * sizeof(char**));
    __sfdgssg_parse_result.ArgsGetNamesFlags() = 
                __sized_malloc((size - flags) * sizeof(char**));
    __sfdgssg_parse_result.ArgsGetNamesVals() = 
                __sized_malloc((size - flags) * sizeof(char**));
    __sfdgssg_parse_result.ArgsGetNamesNumbers() = 
                __sized_malloc((size - flags) * sizeof(size_t));
    __sfdgssg_parse_result.ArgsGetSimpleNumbers() = 
                __sized_malloc((flags) * sizeof(size_t));
    __args_parse_t* out = &__sfdgssg_parse_result;
    size_t simple_flags_count = 0; 
    size_t names_flags_count = 0;
    unsigned char named_flag = 0;
    while (i < argc) {
        char* str = argv[i];
        if (named_flag == 1) {
            out->ArgsGetNamesVals()[names_flags_count] = malloc_str(str);
            named_flag = 0;
            names_flags_count ++;
            i ++;
            continue;
        }
        unsigned int d = 0;
        while (d < size) {
            if (__compile_and_equals_sflag(config[d], str)) {
                if (strchr(config[d], '=') == NULL) {
                    out->ArgsGetSimpleFlags()[simple_flags_count] = malloc_str(str);
                    out->ArgsGetSimpleNumbers()[simple_flags_count] = d;
                    simple_flags_count ++;
                } else {
                    out->ArgsGetNamesFlags()[names_flags_count] = malloc_str(str);
                    out->ArgsGetNamesNumbers()[names_flags_count] = d;
                    named_flag = 1;
                }
            } else {
                free(out->ArgsGetDefault());
                out->ArgsGetDefault() = malloc_str(str);
            }
            d ++;
        }
        i ++;
    }
    out->simple_size = simple_flags_count;
    out->names_size = names_flags_count;
    return EXIT_SUCCESS;
}

#endif /* __LIB_argsparse_H_ */