encoder 0.2.4

use super::Encode;
use encoder_ryu::buffer::Sealed;

/// Encode Float
///
/// # Encode
///
/// ```
/// use encoder::number::Encode;
/// 
/// fn assert(val: impl Encode, cmp: &str) {
///     let mut buf = vec![];
///     val.encode(&mut buf);
///     assert_eq!(String::from_utf8_lossy(&buf), cmp);
/// }
///
/// assert(0_f32, "0.0");
/// assert(1.23456_f32, "1.23456");
/// assert(-1.23456_f32, "-1.23456");
///
/// assert(f32::NAN, "NaN");
/// assert(f32::INFINITY, "inf");
/// assert(f32::NEG_INFINITY, "-inf");
///
/// assert(0_f64, "0.0");
/// assert(1.23456789012345_f64, "1.23456789012345");
/// assert(-1.23456789012345_f64, "-1.23456789012345");
///
/// assert(f64::NAN, "NaN");
/// assert(f64::INFINITY, "inf");
/// assert(f64::NEG_INFINITY, "-inf");
/// ```
///
/// # Compose
///
/// ```
/// use encoder::number::Encode;
/// 
/// let mut buf = vec![];
/// 1_f32.encode(&mut buf);
/// 2_f32.encode(&mut buf);
/// 3_f32.encode(&mut buf);
/// 1_f64.encode(&mut buf);
/// 2_f64.encode(&mut buf);
/// 3_f64.encode(&mut buf);
/// assert_eq!(String::from_utf8_lossy(&buf), r#"1.02.03.01.02.03.0"#);
///
/// assert_eq!(1_f32.stringify(), "1.0");
/// assert_eq!(2_f32.stringify(), "2.0");
/// assert_eq!(3_f32.stringify(), "3.0");
/// ```
macro_rules! impl_float {
    ($t:ident) => {
        impl Encode for $t {
            #[inline]
            fn encode(&self, buf: &mut Vec<u8>) {
                match !self.is_nonfinite() {
                    true => {
                        buf.reserve(24);

                        unsafe {
                            let len = self.write_to_ryu_buffer(buf.as_mut_ptr().add(buf.len()));
                            buf.set_len(buf.len() + len);
                        }
                    }
                    false => {
                        buf.extend_from_slice(self.format_nonfinite().as_bytes());
                    }
                }
            }
        }
    };
}

impl_float!(f32);
impl_float!(f64);