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Copy pathoption_parser.cpp
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125 lines (115 loc) · 3.49 KB
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/*
* Copyright (c) 2014-2021, Andrzej Rybczak <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <boost/regex.hpp>
#include <iostream>
#include "utility/option_parser.h"
bool yes_no(const std::string &v)
{
if (v == "yes")
return true;
else if (v == "no")
return false;
else
invalid_value(v);
}
std::vector<size_t> parse_ratio(const std::string &v, const std::vector<size_t>::size_type length)
{
std::vector<size_t> ret = list_of<size_t>(v, verbose_lexical_cast<size_t>, length, "", ":", "");
size_t total = 0;
for (auto i : ret)
total += i;
if (total == 0)
invalid_value(v);
return ret;
}
////////////////////////////////////////////////////////////////////////////////
bool option_parser::run(std::istream &is, bool ignore_errors)
{
// quoted value. leftmost and rightmost quotation marks are the delimiters.
boost::regex quoted("(\\w+)\\h*=\\h*\"(.*)\"[^\"]*");
// unquoted value. whitespaces get trimmed.
boost::regex unquoted("(\\w+)\\h*=\\h*(.*?)\\h*");
boost::smatch match;
std::string line;
while (std::getline(is, line))
{
if (boost::regex_match(line, match, quoted)
|| boost::regex_match(line, match, unquoted))
{
std::string option = match[1];
auto it = m_parsers.find(option);
if (it != m_parsers.end())
{
try
{
it->second.parse(match[2]);
}
catch (std::exception &e)
{
std::cerr << "Error while processing option \"" << option
<< "\": " << e.what() << "\n";
if (!ignore_errors)
return false;
}
}
else
{
std::cerr << "Unknown option: " << option << "\n";
if (!ignore_errors)
return false;
}
}
}
return true;
}
bool option_parser::initialize_undefined(bool ignore_errors)
{
for (auto &pp : m_parsers)
{
auto &p = pp.second;
if (!p.used())
{
try
{
p.parse_default();
}
catch (std::exception &e)
{
std::cerr << "Error while initializing option \"" << pp.first
<< "\": " << e.what() << "\n";
if (ignore_errors)
return false;
}
}
}
return true;
}