ArgParser/argparser.cpp at master · apilaskowski/ArgParser · GitHub

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//
// Created by Artur Laskowski on 10/11/2017.
//

#include "argparser.h"


typedef int64_t lint;

argparser::argparser::argparser() {}
argparser::argparser::~argparser() {}

std::string fill_space(int shrt_size, int full_size) {
    std::string res = "";
    for(int i = 40 - shrt_size - full_size - 1; i--;) {
        res += ' ';
    }
    return res;
}

void argparser::argparser::show_usage(std::string name) {
    std::cerr << "Usage: " << name << " <option(s)>\n"
              << "Options:\n"
              << "    -h,--help";
    for(int i = 40 - 9; i--;) {
        std::cerr << " ";
    }
    std::cerr << "Show this help message;\n";
    for(int i = 0; i < this->args_types.size(); ++i) {
        std::string shrt, full, desc;
        shrt = this->args_types[i].short_name;
        full = this->args_types[i].long_name;
        desc = this->args_types[i].description;

        std::cerr << "    " << shrt << "," << full << fill_space(shrt.size(), full.size()) << desc;
        if(i + 1 == this->args_types.size()) {
            std::cerr << ".\n";
        } else {
            std::cerr << ";\n";
        }
    }
}

bool argparser::argparser::parse_args(int argc, char* argv[]) {
    for(int i = 1; i < argc; ++i) {
        std::string arg = argv[i];
        bool arg_found = false;
        for(int j = 0; j < this->args_types.size(); ++j) {
            std::string shrt, full;
            shrt = this->args_types[j].short_name;
            full = this->args_types[j].long_name;
            bool bin  = this->args_types[j].binary;
            if(arg == shrt || arg == full) {
                if(bin == true) {
                    args.insert({shrt, "true"});
                    args.insert({full, "true"});
                    arg_found = true;
                    break;
                } else if(i + 1 < argc) {
                    args.insert({shrt, argv[++i]});
                    args.insert({full, argv[i]});
                    arg_found = true;
                    break;
                }
            }
        }
        if(!arg_found){
            if((arg != "-h") && (arg != "--help")) {
                std::cerr << "Unrecognized option: " << arg << std::endl;
            }
            show_usage(argv[0]);
            return false;
        }
    }
    for(int i = 0; i < this->args_types.size(); ++i) {
        std::string shrt, full;
        shrt = this->args_types[i].short_name;
        full = this->args_types[i].long_name;
        bool bin  = this->args_types[i].binary;
        if(bin == true && args.count(shrt) == 0) {
            args.insert({shrt, "false"});
            args.insert({full, "false"});
        }
    }
    return true;
}

void argparser::argparser::addArgHandler(__type t) {
    args_types.push_back(t);
}

bool argparser::argparser::exists(std::string argument_name) {
    return args.count(argument_name);
}

std::string argparser::argparser::handle_argument(std::string param, std::string default_value) {
    std::string argument_value = "";
    if(this->exists(param)) {
        return this->args[param];
    } else if(default_value == "") {
        std::cerr << "Missing " << param << " param" << std::endl;
        this->show_usage("<binary>");
        throw "Missing " + param + " param";
    }
    return default_value;
}