blame: source/code/common.cc

/*

Block Attack - Rise of the Blocks, SDL game, besed on Nintendo's Tetris Attack

Copyright (C) 2008 Poul Sander

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Poul Sander

    R�vehjvej 36, V. 1111

    2800 Kgs. Lyngby

    DENMARK

    blockattack@poulsander.com

    http://blockattack.sf.net

*/

#include "common.h"

#include <sstream>

//Function to convert numbers to string

string itoa(int num)

{

    stringstream converter;

    converter << num;

    return converter.str();

}

string double2str(double num)

{

    stringstream converter;

    converter << num;

    return converter.str();

}        

/**

 * str2double parses a string and returns a double with the value of the string.

 * if the string is not a double then 0.0 is returned instead of throing an error

 * in that way this function will always return a useable value.

 */

double str2double(string str2parse)

{

    try{

        stringstream converter(str2parse);

        double val = 0.0;

        converter >> val;

        return val;

    }catch(ios_base::failure f)

    {

        return 0.0;

    }

}

/**

 * str2int parses a string and returns an int with the value of the string.

 * if the string is not an int then 0 is returned instead of throing an error

 * in that way this function will always return a useable value.

 */

int str2int(string str2parse)

{

    try{

        stringstream converter(str2parse);

        int val = 0;

        converter >> val;

        return val;

    }catch(ios_base::failure f)

    {

        return 0;

    }

}

#ifdef WIN32

//Returns path to "my Documents" in windows:

string getMyDocumentsPath()

{

    TCHAR pszPath[MAX_PATH];

    if (SUCCEEDED(SHGetSpecialFolderPath(NULL, pszPath, CSIDL_PERSONAL, FALSE))) {

        // pszPath is now the path that you want

#if DEBUG

        cout << "MyDocuments Located: " << pszPath << endl;

#endif

        string theResult= pszPath;

        return theResult;

    }

    else

    {

        cout << "Warning: My Documents not found!" << endl;

        string theResult ="";

        return theResult;

    }

}

#endif

/**

 * Returns the path to where all settings must be saved.

 * On unix-like systems this is the home-folder under: ~/.gamesaves/GAMENAME

 * In Windows it is My Documents/My Games

 * Consider changing this for Vista that has a special save games folder

 */

string getPathToSaveFiles()

{

#ifdef __unix__

    return (string)getenv("HOME")+(string)"/.gamesaves/"+GAMENAME;

#elif WIN32

    return getMyDocumentsPath()+(string)"/My Games/"+GAMENAME;

#else

    return ".";

#endif

}

/**

 * Takes a number of milliseconds and returns the value in commonTime format.

 */

commonTime ms2ct(unsigned int milliseconds)

{

    commonTime ct;

    ct.days = 0;

    unsigned int time = milliseconds;

    ct.hours = time/(1000*60*60);

    time = time % (1000*60*60);

    ct.minutes = time/(1000*60);

    time = time % (1000*60);

    ct.seconds = time/1000;

    return ct;

}

commonTime getTotalTime()

{

    commonTime ct;

    ct.days = Config::getInstance()->getInt("totalTimeDays");

    ct.hours = Config::getInstance()->getInt("totalTimeHours");

    ct.minutes = Config::getInstance()->getInt("totalTimeMinutes");

    ct.seconds = Config::getInstance()->getInt("totalTimeSeconds");

    return ct;

}

/**

 * Returns the total runtime with toAdd added but without writing it to config file. 

 * Used for stats

 */

commonTime peekTotalTime(commonTime toAdd)

{

    commonTime ct = getTotalTime();

    ct.seconds +=toAdd.seconds;

    ct.minutes +=ct.seconds/60;

    ct.seconds = ct.seconds%60;

    ct.minutes += toAdd.minutes;

    ct.hours += ct.minutes/60;

    ct.minutes = ct.minutes%60;

    ct.hours += toAdd.hours;

    ct.days += ct.hours/24;

    ct.hours = ct.hours%24;

    ct.days += toAdd.days;

    return ct;

}

/**

 * Same as peekTotalTime but writes the time to the config file.

 * Should only be called only once! when the program shuts down

 */

commonTime addTotalTime(commonTime toAdd)

{

    commonTime ct = peekTotalTime(toAdd);

    Config::getInstance()->setInt("totalTimeDays",ct.days);

    Config::getInstance()->setInt("totalTimeHours",ct.hours);

    Config::getInstance()->setInt("totalTimeMinutes",ct.minutes);

    Config::getInstance()->setInt("totalTimeSeconds",ct.seconds);

    return ct;

}

Config* Config::instance = 0;

Config::Config()

{

    configMap.clear();

    load();

}

void Config::load()

{

    string filename = getPathToSaveFiles()+"/configFile";

    ifstream inFile(filename.c_str());

    string key;

    string previuskey;

    char value[MAX_VAR_LENGTH];

    if(inFile)

    {

        while(!inFile.eof())

        {

            inFile >> key;

            if(key==previuskey) //the last entry will be read 2 times if a linebreak is missing in the end

                    continue; 

            previuskey = key;

            inFile.get(); //Read the space between the key and the content

            inFile.getline(value,MAX_VAR_LENGTH);

            #if DEBUG

                cout << "Config "<< "read: " << key << " with:\"" << value << "\"" << endl;

            #endif

            configMap[key] = (string)value;

        }

        inFile.close();

    }

}

Config* Config::getInstance()

{

    if(Config::instance==0)

    {

        Config::instance = new Config();

    }

    return Config::instance; 

}

void Config::save()

{

    string filename = getPathToSaveFiles()+"/configFile";

    ofstream outFile(filename.c_str(),ios::trunc);

    if(outFile)

    {

        map<string,string>::iterator iter;

        for(iter = configMap.begin(); iter != configMap.end(); iter++)

        {

            outFile << iter->first << " " << iter->second << endl;

        }

        outFile << "\n"; //The last entry in the file will be read double if a linebreak is missing

        //This is checked on load too in case a user changes it himself.

    }

    outFile.close();

}

bool Config::exists(string varName)

{

    //Using that find returns an iterator to the end of the map if not found

    return configMap.find(varName) != configMap.end();

}

void Config::setString(string varName, string content)

{

    configMap[varName] = content;

}

void Config::setInt(string varName, int content)

{

    configMap[varName] = itoa(content);

}

void Config::setValue(string varName,double content)

{

    configMap[varName] = double2str(content);

}

string Config::getString(string varName)

{

    if(exists(varName))

    {

        return configMap[varName];

    }

    else

        return "";

}

int Config::getInt(string varName)

{

    if(exists(varName))

    {

        return str2int(configMap[varName]);

    }

    else

        return 0;

}

double Config::getValue(string varName)

{

    if(exists(varName))

    {

        return str2double(configMap[varName]);

    }

    else

        return 0.0;

}