103 lines
3.2 KiB
C++
103 lines
3.2 KiB
C++
/*
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* Copyright (c) 2014, Andrzej Rybczak <electricityispower@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <boost/regex.hpp>
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#include <iostream>
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#include "utility/option_parser.h"
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bool option_parser::run(std::istream &is, bool ignore_errors)
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{
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// quoted value. leftmost and rightmost quotation marks are the delimiters.
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boost::regex quoted("(\\w+)\\h*=\\h*\"(.*)\"[^\"]*");
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// unquoted value. whitespaces get trimmed.
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boost::regex unquoted("(\\w+)\\h*=\\h*(.*?)\\h*");
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boost::smatch match;
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std::string line;
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while (std::getline(is, line))
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{
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if (boost::regex_match(line, match, quoted)
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|| boost::regex_match(line, match, unquoted))
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{
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std::string option = match[1];
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auto it = m_parsers.find(option);
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if (it != m_parsers.end())
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{
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try {
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it->second.parse(match[2]);
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} catch (std::exception &e) {
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std::cerr << "Error while processing option \"" << option << "\": " << e.what() << "\n";
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if (!ignore_errors)
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return false;
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}
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}
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else
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{
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std::cerr << "Unknown option: " << option << "\n";
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if (!ignore_errors)
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return false;
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}
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}
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}
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return true;
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}
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bool option_parser::initialize_undefined(bool ignore_errors)
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{
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for (auto &p : m_parsers)
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{
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if (!p.second.defined())
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{
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try {
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p.second.run_default();
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} catch (std::exception &e) {
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std::cerr << "Error while initializing option \"" << p.first << "\": " << e.what() << "\n";
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if (ignore_errors)
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return false;
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}
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}
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}
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return true;
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}
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option_parser::worker yes_no(bool &arg, bool value)
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{
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return option_parser::worker([&arg](std::string &&v) {
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if (v == "yes")
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arg = true;
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else if (v == "no")
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arg = false;
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else
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throw std::runtime_error("invalid argument: " + v);
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}, defaults_to(arg, value));
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}
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