Trait WriteVarint

Source

pub trait WriteVarint {
    // Required methods
    fn write_varint(&mut self, value: u64) -> Result<()>;
    fn write_signed_varint(&mut self, value: i64) -> Result<()>;
}

Expand description

A trait for writing varint integers from a stream.

The API here is explicitly limited to u64 and i64 in order to reduce code size.

§Example

use pw_stream::{Cursor, WriteVarint};

let mut cursor = Cursor::new(vec![0x0; 16]);

cursor.write_varint(0xffff_fffe).unwrap();
cursor.write_signed_varint(i32::MIN.into()).unwrap();

let buffer = cursor.into_inner();
assert_eq!(buffer,vec![
  0xfe, 0xff, 0xff, 0xff, 0x0f, 0xff, 0xff, 0xff,
  0xff, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);