Function rmp::encode::write_i8

pub fn write_i8<W: RmpWrite>(
    wr: &mut W,
    val: i8,
) -> Result<(), ValueWriteError<W::Error>>

Encodes and attempts to write an i8 value as a 2-byte sequence into the given write.

The first byte becomes the marker and the second one will represent the data itself.

Note, that this function will encode the given value in 2-byte sequence no matter what, even if the value can be represented using single byte as a fixnum. Also note, that the first byte will always be the i8 marker (0xd0).

If you need to fit the given buffer efficiently use write_sint instead, which automatically selects the appropriate integer representation.

Errors

This function will return ValueWriteError on any I/O error occurred while writing either the marker or the data.

Examples

let mut buf = [0x00, 0x00];

rmp::encode::write_i8(&mut &mut buf[..], 42).ok().unwrap();
assert_eq!([0xd0, 0x2a], buf);

// Note, that -18 can be represented simply as `[0xee]`, but the function emits 2-byte sequence.
rmp::encode::write_i8(&mut &mut buf[..], -18).ok().unwrap();
assert_eq!([0xd0, 0xee], buf);