[−][src]Function ordcode::ser_to_buf_asc_exact
pub fn ser_to_buf_asc_exact<T: ?Sized>(buf: &mut [u8], value: &T) -> Result where
T: Serialize,
Serialize value
into pre-allocated, exact size byte buffer
Buffer is expected to be of exact size to hold serialized data. You can use calc_size()
to get exact size of required buffer before serialization.
In case of buffer underflow or buffer overflow, corresponding error is returned.
Example
#[derive(serde_derive::Serialize)] struct Foo(u16, String); let foo = Foo(1, "abc".to_string()); assert_eq!(calc_size_asc(&foo).unwrap(), 6); let mut buf = [0_u8; 6]; // need buffer of exact size! ser_to_buf_asc_exact(&mut buf, &foo).unwrap(); assert_eq!(&buf[2..5], b"abc"); assert_eq!(buf[5], 7); // last byte is string length (3) in varint encoding