gnss-sdr/src/core/libs/INIReader.cc

/*!
 * \file INIReader.cc
 * \brief This class reads an INI file into easy-to-access name/value pairs.
 * \author Brush Technologies, 2009.
 *
 * inih (INI Not Invented Here) is a simple .INI file parser written in C++.
 * It's only a couple of pages of code, and it was designed to be small
 * and simple, so it's good for embedded systems. To use it, just give
 * ini_parse() an INI file, and it will call a callback for every
 * name=value pair parsed, giving you strings for the section, name,
 * and value. It's done this way because it works well on low-memory
 * embedded systems, but also because it makes for a KISS implementation.
 *
 * -------------------------------------------------------------------------
 * inih and INIReader are released under the New BSD license:
 *
 * Copyright (c) 2009, Brush Technology
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *    * 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.
 *    * Neither the name of Brush Technology 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 BRUSH TECHNOLOGY ''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 BRUSH TECHNOLOGY 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.
 *
 * Go to the project home page for more info:
 *
 * http://code.google.com/p/inih/
 * -------------------------------------------------------------------------
 */

#include "INIReader.h"
#include "ini.h"
#include <cctype>   // for tolower
#include <cstdlib>  // for stro
#include <utility>


INIReader::INIReader(const std::string& filename)
{
    _error = ini_parse(filename.c_str(), ValueHandler, this);
}


int INIReader::ParseError()
{
    return _error;
}


std::string INIReader::Get(std::string section, std::string name, std::string default_value)
{
    std::string key = MakeKey(std::move(section), std::move(name));
    return _values.count(key) ? _values[key] : default_value;
}


int64_t INIReader::GetInteger(std::string section, std::string name, int64_t default_value)
{
    std::string valstr = Get(std::move(section), std::move(name), "");
    const char* value = valstr.c_str();
    char* end;
    // This parses "1234" (decimal) and also "0x4D2" (hex)
    int64_t n = strtol(value, &end, 0);
    return end > value ? n : default_value;
}


std::string INIReader::MakeKey(const std::string& section, const std::string& name)
{
    std::string key = section + "." + name;
    // Convert to lower case to make lookups case-insensitive
    for (char & i : key)
        i = tolower(i);
    return key;
}


int INIReader::ValueHandler(void* user, const char* section, const char* name,
    const char* value)
{
    auto* reader = static_cast<INIReader*>(user);
    reader->_values[MakeKey(section, name)] = value;
    return 1;
}