blame: source/code/common.cpp

/*

===========================================================================

blockattack - Block Attack - Rise of the Blocks

Copyright (C) 2005-2012 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, see http://www.gnu.org/licenses/

Source information and contacts persons can be found at

http://blockattack.net

===========================================================================

*/

#include "common.h"

#include <sstream>

#include <cstring>

#include "os.hpp"

using namespace std;

using boost::format;

static stringstream converter;

//Function to convert numbers to string

string itoa(int num) {

	converter.str(std::string());

	converter.clear();

	converter << num;

	return converter.str();

}

string double2str(double num) {

	converter.str(std::string());

	converter.clear();

	converter << num;

	return converter.str();

}

bool strequals(const char* a, const char* b) {

	return strcmp(a,b) == 0;

}

void dieOnNullptr(bool ptr, const char* msg) {

	if (!ptr) {

		cerr << "Fatal error: " << msg << endl;

		abort();

	}

}

/**

 * 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(const string& str2parse) {

	try {

		converter.clear();

		converter.str(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(const string& str2parse) {

	try {

		converter.clear();

		converter.str(str2parse);

		int val = 0;

		converter >> val;

		return val;

	}

	catch (ios_base::failure& f) {

		return 0;

	}

}

/**

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

 */

commonTime TimeHandler::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 TimeHandler::getTime(const string& name) {

	commonTime ct;

	ct.days = Config::getInstance()->getInt(name+"Days");

	ct.hours = Config::getInstance()->getInt(name+"Hours");

	ct.minutes = Config::getInstance()->getInt(name+"Minutes");

	ct.seconds = Config::getInstance()->getInt(name+"Seconds");

	return ct;

}

/**

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

 * Used for stats

 */

commonTime TimeHandler::peekTime(const string& name, const commonTime& toAdd) {

	commonTime ct = getTime(name);

	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 TimeHandler::addTime(const string& name, const commonTime& toAdd) {

	commonTime ct = peekTime(name,toAdd);

	Config::getInstance()->setInt(name+"Days",ct.days);

	Config::getInstance()->setInt(name+"Hours",ct.hours);

	Config::getInstance()->setInt(name+"Minutes",ct.minutes);

	Config::getInstance()->setInt(name+"Seconds",ct.seconds);

	return ct;

}

Config* Config::instance = 0;

Config::Config() {

	configMap.clear();

	load();

	shuttingDown = 0; // Not shutting down

}

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(const string& varName) const {

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

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

}

void Config::setDefault(const string& varName,const string& content) {

	if (exists(varName)) {

		return;    //Already exists do not change

	}

	setString(varName,content);

}

void Config::setShuttingDown(long shuttingDown) {

	this->shuttingDown = shuttingDown;

}

long Config::isShuttingDown() const {

	return shuttingDown;

}

void Config::setString(const string& varName, const string& content) {

	configMap[varName] = content;

}

void Config::setInt(const string& varName, int content) {

	configMap[varName] = itoa(content);

}

void Config::setValue(const string& varName,double content) {

	configMap[varName] = double2str(content);

}

string Config::getString(const string& varName) {

	if (exists(varName)) {

		return configMap[varName];

	}

	else {

		return "";

	}

}

int Config::getInt(const string& varName) {

	if (exists(varName)) {

		return str2int(configMap[varName]);

	}

	else {

		return 0;

	}

}

double Config::getValue(const string& varName) {

	if (exists(varName)) {

		return str2double(configMap[varName]);

	}

	else {

		return 0.0;

	}

}