use crate::AsciiChar;

pub trait AsciiCharConvertable {
    fn asAsciiChar(&self) -> AsciiChar;
}

impl AsciiCharConvertable for char {
    fn asAsciiChar(&self) -> AsciiChar {
        let raw = *self as u32;
        if raw < 128 {
            return AsciiChar::ASCII(raw as u8);
        } else {
            return AsciiChar::NOT_ASCII;
        }
    }
}

impl AsciiCharConvertable for u8 {
    fn asAsciiChar(&self) -> AsciiChar {
        if *self < 128 {
            return AsciiChar::ASCII(*self);
        } else {
            return AsciiChar::NOT_ASCII;
        }
    }
}

macro_rules! convert_unsigned {
    () => {};
    ($t0:ty $(, $tN:ty)* $(,)?) => {
        impl AsciiCharConvertable for $t0 {
            fn asAsciiChar(&self) -> AsciiChar {
                if *self < 128 {
                    return AsciiChar::ASCII(*self as u8);
                } else {
                    return AsciiChar::NOT_ASCII;
                }
            }
        }

        convert_unsigned!($($tN ,)*);
    }
}

convert_unsigned!(u16, u32, u64);

impl AsciiCharConvertable for i8 {
    fn asAsciiChar(&self) -> AsciiChar {
        if 0 <= *self {
            return AsciiChar::ASCII(*self as u8);
        } else {
            return AsciiChar::NOT_ASCII;
        }
    }
}

macro_rules! convert_signed {
    () => {};
    ($t0:ty $(, $tN:ty)* $(,)?) => {
        impl AsciiCharConvertable for $t0 {
            fn asAsciiChar(&self) -> AsciiChar {
                if 0 <= *self && *self < 128 {
                    return AsciiChar::ASCII(*self as u8);
                } else {
                    return AsciiChar::NOT_ASCII;
                }
            }
        }

        convert_unsigned!($($tN ,)*);
    }
}

convert_signed!(i16, i32, i64);