blame: source/code/common.h

/*

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

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

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

*/

/*

 *This is the common.h

 *It contains some basic functions that nearly all multiplatform games are going

 *to need.

 */

#ifndef _COMMON_H

#define	_COMMON_H

#include <string>

#include <iostream>

#include <map>

#include <stdlib.h>

#include <libintl.h>

#include <boost/format.hpp>

#define _(String) gettext (String)

struct commonTime

{

	unsigned int days;

	unsigned int hours;

	unsigned int minutes;

	unsigned int seconds;

};

std::string itoa(int num) __attribute__((const));

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

/**

 * 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 std::string &str2parse) __attribute__((const));

std::string double2str(double num) __attribute__((const));

void dieOnNullptr(bool, const char* msg);

/**

 * 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 std::string &str2parse) __attribute__((const));

/**

 * Does the eqivilent to snprintf but returns a C++ string

 * @param fmt The format string

 * @param ... Additional paremeters for the place holders

 * @return A string with the result

 */

std::string SPrintStringF(const char* fmt, ...) __attribute__ ((format (printf, 1, 2)));

/**

 * Prints to an internal C-buffer

 * Because it uses an internal buffer the returned buffer is only valid until the next call

 * The String is cut at 1024 chars (including the 0 terminator)

 * This is the larges string that can safely be parsed to NFont

 * @param fmt The format string

 * @param ... Additional paremeters for the place holders

 * @return Pointer to an internal buffer

 */

const char* SPrintCF(const char* fmt, ...) __attribute__ ((format (printf, 1, 2)));

class TimeHandler

{

public:

	static commonTime ms2ct(unsigned int milliseconds);

	static commonTime getTime(const std::string &name);

	static commonTime peekTime(const std::string &name, const commonTime &toAdd);

	static commonTime addTime(const std::string &name, const commonTime &toAdd);

};

#define MAX_VAR_LENGTH 1024

/*This is the Config class it is a map to hold config variables.

 *It is inspired by Quake 3's CVAR system although a lot simpler.

 *All variables have keys "varName" that is used to access a variable.

 *

 *This class is a singleton

 */

class Config

{

private:

	std::map<std::string, std::string> configMap;

	static Config *instance;

	void load();

	/* tells if the user has requested a shutdown */

	long shuttingDown;

protected:

	Config();

public:

	/*Config is a singleton.

	 *It is accessed like this:

	 *Config::getInstance()->method2call(paramters);

	 */

	static Config* getInstance();

	/*save()

	 *forces the config to be written to disk. This will also happened if the

	 *program terminates normally.

	 */

	void save();

	/*getString(varName)

	 *Looks in the config file and returns the string that matches the key "varName"

	 *Returns an empty string if varName does not exist.

	 */

	std::string getString(const std::string &varName);

	/*getInt(varName)

	 *Looks in the config file and returns the int that matches the key "varName"

	 *Returns "0" if varName does not exist or cannot be parsed.

	 */

	int getInt(const std::string &varName);

	/*getValue(varName)

	 *Looks in the config file and returns the double that matches the key "varName"

	 *Returns "0.0" if varName does not exist or cannot be parsed.

	 */

	double getValue(const std::string &varName);

	/*setString(varName,content)

	 *Sets the config variable with key "varName" to the value of "content"

	 */

	void setString(const std::string &varName, const std::string &content);

	/*setInt(varName,content)

	 *Sets the config variable with key "varName" to the value of "content"

	 */

	void setInt(const std::string &varName, int content);

	/**

	 * Sets a config variable to a given (double) value

	 * @param varName Name of the variable to set

	 * @param content Value to give the variable

	 */

	void setValue(const std::string &varName,double content);

	/**

	 * returns true if the key varName exists. This is used the first time 1.4.0

	 * starts so that it can see that it has to import configs from an earlier

	 * version.

	 * @param varName Name of the variable

	 * @return true if the varaible exists

	 */

	bool exists(const std::string &varName) const;

	/*setDefault(varName,value)

	 *if the variable "varName" does not exist it will be created with value "value"

	 *if varName exists then this will have no effect

	 */

	/**

	 * Set default value for a variable. If the variable "varName" does not exist it will be created with value "value"

	 * if varName exists then this will have no effect

	 * @param varName Name of the variable

	 * @param content The default value

	 */

	void setDefault(const std::string &varName, const std::string &content);

	/**

	 * Should be set if the user has requested the program to shutdown.

	 * @param shuttingDown value of shutdown command. 5 = default = shutdown but allow saving

	 */

	void setShuttingDown(long shuttingDown = 5);

	/**

	 * tells if the user wants to shutdown. This can be used if the exit button is pressed deaply in the program.

	 * @return

	 */

	long isShuttingDown() const;

};

#endif	/* _COMMON_H */