With these functions, any data can be cleaned from the PGM space.

pgm.hpp

/**
* @licence WTFPL
*
*/

#pragma once

#include "avr/pgmspace.h"

template<typename T> void PROGMEM_readAnything(const T * source, T& dest)
{
	memcpy_P(&dest, source, sizeof(T));
}

template<typename T> T PROGMEM_getAnything(const T * source)
{
	static T temp;
	memcpy_P(&temp, source, sizeof(T));
	return temp;
}