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/**
* Copyright © 2016 IBM Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "argument.hpp"
#include <algorithm>
#include <cassert>
#include <iostream>
#include <iterator>
namespace phosphor
{
namespace gpio
{
using namespace std::string_literals;
const std::string ArgumentParser::trueString = "true"s;
const std::string ArgumentParser::emptyString = ""s;
const char* ArgumentParser::optionStr = "p:k:r:t:?h";
const option ArgumentParser::options[] = {
{"path", required_argument, nullptr, 'p'},
{"key", required_argument, nullptr, 'k'},
{"polarity", required_argument, nullptr, 'r'},
{"target", required_argument, nullptr, 't'},
{"continue", no_argument, nullptr, 'c'},
{"help", no_argument, nullptr, 'h'},
{0, 0, 0, 0},
};
ArgumentParser::ArgumentParser(int argc, char** argv)
{
int option = 0;
while (-1 !=
(option = getopt_long(argc, argv, optionStr, options, nullptr)))
{
if ((option == '?') || (option == 'h'))
{
usage(argv);
exit(-1);
}
auto i = &options[0];
while ((i->val != option) && (i->val != 0))
{
++i;
}
if (i->val)
{
// optional argument may get nullptr for optarg
// make it empty string in such case
auto arg = (optarg == nullptr ? "" : optarg);
arguments[i->name] = (i->has_arg ? arg : trueString);
}
}
}
const std::string& ArgumentParser::operator[](const std::string& opt)
{
auto i = arguments.find(opt);
if (i == arguments.end())
{
return emptyString;
}
else
{
return i->second;
}
}
void ArgumentParser::usage(char** argv)
{
std::cerr << "Usage: " << argv[0] << " [options]\n";
std::cerr << "Options:\n";
std::cerr << " --help Print this menu\n";
std::cerr << " --path=<path> Path of input device."
" Ex: /dev/input/event2\n";
std::cerr << " --key=<key> Input GPIO key number\n";
std::cerr << " --polarity=<polarity> Asertion polarity to look for."
" This is 0 / 1 \n";
std::cerr << " --target=<systemd unit> Systemd unit to be called on GPIO"
" state change\n";
std::cerr << " [--continue] Whether or not to continue"
" after key pressed\n";
}
} // namespace gpio
} // namespace phosphor
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