pseudo

function compareButtonPress(buttonToPress, buttonPressed) {

array possibleButtons(space, shift, enter, left, right, up, down, etc.);
int pressedMatch = 0;

for (x = 0; x < possibleButtons.length; x++) {
    if (possibleButtons(x) == buttonToPress && buttonPressed == buttonToPress) {
        pressedMatch++;
    } else if (buttonPressed == possibleButtons(x)) {
        pressedMatch = pressedMatch + 2;
    }
}

if (pressedMatch != 1) {
    return FALSE;
} else {
    return TRUE;
}

}