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Diffstat (limited to 'argument.cpp')
-rw-r--r-- | argument.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/argument.cpp b/argument.cpp new file mode 100644 index 0000000..3df84e7 --- /dev/null +++ b/argument.cpp @@ -0,0 +1,83 @@ +/** + * 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 <iostream> +#include <iterator> +#include <algorithm> +#include <cassert> +#include "argument.hpp" + +namespace phosphor +{ +namespace led +{ + +const std::string ArgumentParser::true_string = "true"; +const std::string ArgumentParser::empty_string = ""; + +const char* ArgumentParser::optionstr = "n:p:?h"; +const option ArgumentParser::options[] = +{ + { "name", required_argument, nullptr, 'n' }, + { "path", required_argument, nullptr, 'p' }, + { "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) + arguments[i->name] = (i->has_arg ? optarg : true_string); + } +} + +const std::string& ArgumentParser::operator[](const std::string& opt) +{ + auto i = arguments.find(opt); + if (i == arguments.end()) + { + return empty_string; + } + else + { + return i->second; + } +} + +void ArgumentParser::usage(char** argv) +{ + std::cerr << "Usage: " << argv[0] << " [options]" << std::endl; + std::cerr << "Options:" << std::endl; + std::cerr << " --help Print this menu" << std::endl; + std::cerr << " --name=<name> Name of the LED" + << std::endl; + std::cerr << " --path=<path> sysfs path like /sys/class/leds" + << std::endl; +} +} // namespace led +} // namespace phosphor |