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/*
* Copyright (C) 2015, 2016 ,2017, 2018, 2019 "IoT\.bzh"
* Author "Loïc Collignon" <loic.collignon@iot.bzh>
*
* 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 "ini-config.hpp"
bool starts_with(const std::string& text, const std::string& token)
{
if(text.length() < token.length()) return false;
return (text.compare(0, token.length(), token) == 0);
}
void ini_config::read_file(const std::string& filename)
{
std::ifstream f(filename);
if (f)
{
std::regex r_section("^\\s*\\[([^\\]]+)\\]\\s*(#.*)?$");
std::regex r_key("^\\s*([^\\s]+)\\s*=\\s*\"([^\"]+)\"\\s*(#.*)?$");
std::string current_section;
std::string line;
while (std::getline(f, line))
{
std::smatch mr;
switch (qualify(line))
{
case line_type::section:
if (std::regex_match(line, mr, r_section) && mr.size() >= 2 && mr[1].matched)
{
current_section = mr[1].str();
}
break;
case line_type::key:
if(std::regex_match(line, mr, r_key) && mr.size() >= 2 && mr[1].matched)
{
std::string key = current_section + '/' + mr[1].str();
config_[key] = (mr.size() >= 3 && mr[2].matched) ? mr[2].str() : "";
}
break;
case line_type::ignore:
break;
}
}
}
}
ini_config::map ini_config::get_keys(const std::string& section, bool wo_prefix)
{
map ret;
std::string key;
std::string prefix = section + '/';
for(auto i = config_.begin();
i != config_.end();
++i)
{
if (starts_with(i->first, prefix))
{
if(wo_prefix)
key = i->first.substr(section.size()+1);
else
key = i->first;
ret[key] = i->second;
}
}
return ret;
}
std::string ini_config::get_value(const std::string& section, const std::string& key)
{
return config_[section + '/' + key];
}
ini_config::line_type ini_config::qualify(std::string& line)
{
if (line.size())
{
for (std::string::value_type c : line)
{
if (c == '#') return line_type::ignore;
if (c == '[') return line_type::section;
if (!std::isspace(c, std::locale("C"))) return line_type::key;
}
}
return line_type::ignore;
}
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