optionparser.h

/*
 * Copyright (c) 2015 Philip Taylor
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "third_party/optionparser-1.3/optionparser.h"

struct Arg : public option::Arg
{
    static void printError(const char* msg1, const option::Option& opt,
            const char* msg2)
    {
        std::cerr << msg1;
        std::cerr << std::string(opt.name, opt.namelen);
        std::cerr << msg2;
    }

    static option::ArgStatus Unknown(const option::Option& option, bool msg)
    {
        if (msg)
            printError("Unknown option '", option, "'\n");
        return option::ARG_ILLEGAL;
    }

    static option::ArgStatus Required(const option::Option& option, bool msg)
    {
        if (option.arg != 0)
            return option::ARG_OK;

        if (msg)
            printError("Option '", option, "' requires an argument\n");
        return option::ARG_ILLEGAL;
    }
};