pub fn read_int<T: FromPrimitive, R: RmpRead>(
rd: &mut R,
) -> Result<T, NumValueReadError<R::Error>>Expand description
Attempts to read up to 9 bytes from the given reader and to decode them as integral T value.
This function will try to read up to 9 bytes from the reader (1 for marker and up to 8 for data)
and interpret them as a big-endian T.
Unlike read_*, this function weakens type restrictions, allowing you to safely decode packed
values even if you aren’t sure about the actual integral type.
§Errors
This function will return NumValueReadError on any I/O error while reading either the marker
or the data.
It also returns NumValueReadError::OutOfRange if the actual type is not an integer or it does
not fit in the given numeric range.
§Examples
let buf = [0xcd, 0x1, 0x2c];
assert_eq!(300u16, rmp::decode::read_int(&mut &buf[..]).unwrap());
assert_eq!(300i16, rmp::decode::read_int(&mut &buf[..]).unwrap());
assert_eq!(300u32, rmp::decode::read_int(&mut &buf[..]).unwrap());
assert_eq!(300i32, rmp::decode::read_int(&mut &buf[..]).unwrap());
assert_eq!(300u64, rmp::decode::read_int(&mut &buf[..]).unwrap());
assert_eq!(300i64, rmp::decode::read_int(&mut &buf[..]).unwrap());
assert_eq!(300usize, rmp::decode::read_int(&mut &buf[..]).unwrap());
assert_eq!(300isize, rmp::decode::read_int(&mut &buf[..]).unwrap());