CmdArguments.cpp

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//
// Class CmdArguments
//   Parsing command line arguments
//
//   In order to have a flexible framework, each component implementation gets
//   access to all command line arguments.
//   All command line options have the form:
//       --name=value
//   Spaces before and after the "=" will be trimmed.
//
// Copyright (c) 2010 - 2013, Yves Ineichen, ETH Zürich
// All rights reserved
//
// Implemented as part of the PhD thesis
// "Toward massively parallel multi-objective optimization with application to
// particle accelerators" (https://doi.org/10.3929/ethz-a-009792359)
//
// This file is part of OPAL.
//
// OPAL 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 3 of the License, or
// (at your option) any later version.
//
// You should have received a copy of the GNU General Public License
// along with OPAL. If not, see <https://www.gnu.org/licenses/>.
//
#include "Util/CmdArguments.h"
 
#include "Utilities/Util.h"
 
#include <cstddef>
#include <cstring>
#include <string>
 
void CmdArguments::addArguments(int argc, char **argv) {
 
    for (int i=1; i<argc; i++) {
        std::string arg = argv[i];
        std::string name, value;
        this->split(name, value, arg);
        arguments_.insert(std::pair<std::string, std::string>(name, value));
    }
}
 
void CmdArguments::split(std::string& name,
                         std::string& value, std::string arg) {
 
    std::size_t pos = arg.find("=");
    //strip leading '--' and '='
    name = arg.substr(2, pos - 2);
    value = arg.substr(pos + 1);
 
    name  = Util::trim_chars(name, " \t\n\r\f\v");
    value = Util::trim_chars(value, " \t\n\r\f\v");
}
 
char** CmdArguments::getArguments() const {
    const unsigned int size = arguments_.size();
    char** args = new char*[2 * size];
 
    unsigned int i = 0;
    auto it = arguments_.cbegin();
    const auto end = arguments_.cend();
    for (; it != end; ++ it) {
        const std::string& key = it->first;
        char* argname = new char[key.length() + 1];
        std::strcpy(argname, key.c_str());
        args[i++] = argname;
 
        const std::string& value = it->second;
        char* argvalue = new char[value.length() + 1];
        std::strcpy(argvalue, value.c_str());
        args[i++] = argvalue;
    }
 
    return args;
}