Function key_shiftpressed

src/inputdevice.cpp:6343–6346

	return (input_getqualifiers() & ID_FLAG_QUALIFIER_SPECIAL) != 0;
}
bool key_shiftpressed(void)
{
	return (input_getqualifiers() & ID_FLAG_QUALIFIER_SHIFT) != 0;
}
bool key_altpressed(void)
{
	return (input_getqualifiers() & ID_FLAG_QUALIFIER_ALT) != 0;