CConfigFile.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */

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

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

using namespace mrpt;
using namespace mrpt::utils;
using namespace mrpt::utils::simpleini;
using namespace std;

/*---------------------------------------------------------------
                                        Constructor
 ---------------------------------------------------------------*/
CConfigFile::CConfigFile(const std::string& fileName)
{
        MRPT_START

        m_file = fileName;
        m_modified = false;
        m_ini = (void*)new MRPT_CSimpleIni();
        static_cast<MRPT_CSimpleIni*>(m_ini.get())->LoadFile(fileName.c_str());

        MRPT_END
}

/*---------------------------------------------------------------
                                        Constructor
 ---------------------------------------------------------------*/
CConfigFile::CConfigFile()
{
        MRPT_START

        m_file = "";
        m_modified = false;
        m_ini = (void*)new MRPT_CSimpleIni();

        MRPT_END
}

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

        m_file = fil_path;
        m_modified = false;

        static_cast<MRPT_CSimpleIni*>(m_ini.get())->LoadFile(fil_path.c_str());
        MRPT_END
}

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

void CConfigFile::discardSavingChanges() { m_modified = false; }
/*---------------------------------------------------------------
                                        Destructor
 ---------------------------------------------------------------*/
CConfigFile::~CConfigFile()
{
        writeNow();
        delete static_cast<MRPT_CSimpleIni*>(m_ini.get());
}

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

        m_modified = true;

        if (0 > static_cast<MRPT_CSimpleIni*>(m_ini.get())
                                ->SetValue(section.c_str(), name.c_str(), str.c_str(), NULL))
                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 ? NULL : defaultStr.c_str();

        const char* aux =
                static_cast<const MRPT_CSimpleIni*>(m_ini.get())
                        ->GetValue(
                                section.c_str(), name.c_str(), defVal,
                                NULL);  // 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(vector_string& sections) const
{
        MRPT_CSimpleIni::TNamesDepend names;
        static_cast<const MRPT_CSimpleIni*>(m_ini.get())->GetAllSections(names);

        MRPT_CSimpleIni::TNamesDepend::iterator n;
        vector_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, vector_string& keys) const
{
        MRPT_CSimpleIni::TNamesDepend names;
        static_cast<const MRPT_CSimpleIni*>(m_ini.get())
                ->GetAllKeys(section.c_str(), names);

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