CConfigFile.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2020, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include "config-precomp.h"  // Precompiled headers

#include <mrpt/config/CConfigFile.h>
#include <mrpt/system/os.h>
#include "simpleini/SimpleIni.h"

using namespace mrpt;
using namespace mrpt::config;
using namespace mrpt::config::simpleini;
using namespace std;

struct CConfigFile::Impl
{
    MRPT_CSimpleIni m_ini;
};

/*---------------------------------------------------------------
                    Constructor
 ---------------------------------------------------------------*/
CConfigFile::CConfigFile(const std::string& fileName)
    : m_impl(mrpt::make_impl<CConfigFile::Impl>())
{
    MRPT_START

    m_file = fileName;
    m_modified = false;
    m_impl->m_ini.LoadFile(fileName.c_str());

    MRPT_END
}

/*---------------------------------------------------------------
                    Constructor
 ---------------------------------------------------------------*/
CConfigFile::CConfigFile() : m_impl(mrpt::make_impl<CConfigFile::Impl>())
{
    MRPT_START

    m_file = "";
    m_modified = false;

    MRPT_END
}

/*---------------------------------------------------------------
                    setFileName
 ---------------------------------------------------------------*/
void CConfigFile::setFileName(const std::string& fil_path)
{
    MRPT_START

    m_file = fil_path;
    m_modified = false;

    m_impl->m_ini.LoadFile(fil_path.c_str());
    MRPT_END
}

/*---------------------------------------------------------------
                    writeNow
 ---------------------------------------------------------------*/
void CConfigFile::writeNow()
{
    MRPT_START
    if (m_modified && !m_file.empty())
    {
        m_impl->m_ini.SaveFile(m_file.c_str());
        m_modified = false;
    }
    MRPT_END
}

void CConfigFile::discardSavingChanges() { m_modified = false; }

CConfigFile::~CConfigFile()
{
    try
    {
        writeNow();
    }
    catch (const std::exception& e)
    {
        std::cerr << "[~CConfigFile] Exception:\n" << mrpt::exception_to_str(e);
    }
}

void CConfigFile::writeString(
    const std::string& section, const std::string& name, const std::string& str)
{
    MRPT_START

    m_modified = true;

    if (0 > m_impl->m_ini.SetValue(
                section.c_str(), name.c_str(), str.c_str(), nullptr))
        THROW_EXCEPTION("Error changing value in INI-style file!");

    MRPT_END
}

/*---------------------------------------------------------------
                    readString
 ---------------------------------------------------------------*/
std::string CConfigFile::readString(
    const std::string& section, const std::string& name,
    const std::string& defaultStr, bool failIfNotFound) const
{
    MRPT_START
    const char* defVal = failIfNotFound ? nullptr : defaultStr.c_str();

    const char* aux = m_impl->m_ini.GetValue(
        section.c_str(), name.c_str(), defVal,
        nullptr);  // The memory is managed by the SimpleIni object

    if (failIfNotFound && !aux)
    {
        string tmpStr(format(
            "Value '%s' not found in section '%s' of file '%s' and "
            "failIfNotFound=true.",
            name.c_str(), section.c_str(), m_file.c_str()));
        THROW_EXCEPTION(tmpStr);
    }

    // Remove possible comments: "//"
    std::string ret = aux;
    size_t pos;
    if ((pos = ret.find("//")) != string::npos && pos > 0 &&
        isspace(ret[pos - 1]))
        ret = ret.substr(0, pos);
    return ret;

    MRPT_END
}

/*---------------------------------------------------------------
                     getAllSections
 ---------------------------------------------------------------*/
void CConfigFile::getAllSections(std::vector<std::string>& sections) const
{
    MRPT_CSimpleIni::TNamesDepend names;
    m_impl->m_ini.GetAllSections(names);

    MRPT_CSimpleIni::TNamesDepend::iterator n;
    std::vector<std::string>::iterator s;
    sections.resize(names.size());
    for (n = names.begin(), s = sections.begin(); n != names.end(); ++n, ++s)
        *s = n->pItem;
}

/*---------------------------------------------------------------
                      getAllKeys
 ---------------------------------------------------------------*/
void CConfigFile::getAllKeys(
    const string& section, std::vector<std::string>& keys) const
{
    MRPT_CSimpleIni::TNamesDepend names;
    m_impl->m_ini.GetAllKeys(section.c_str(), names);

    MRPT_CSimpleIni::TNamesDepend::iterator n;
    std::vector<std::string>::iterator s;
    keys.resize(names.size());
    for (n = names.begin(), s = keys.begin(); n != names.end(); ++n, ++s)
        *s = n->pItem;
}

void CConfigFile::clear() { m_impl->m_ini.Reset(); }