[−][src]Trait binjs_io::bytes::varnum::ReadVarNum

pub trait ReadVarNum {
    fn read_varnum(&mut self) -> Result<u32, Error>;

    fn read_signed_varnum(&mut self) -> Result<i32, Error>;

    fn read_maybe_varnum(&mut self) -> Result<Option<u32>, Error>;

    fn read_varnum_to(&mut self, num: &mut u32) -> Result<usize, Error>;

    fn read_extended_varnum_to(&mut self, num: &mut u32) -> Result<usize, Error>;

    fn read_extended_signed_varnum_to(
        &mut self, 
        num: &mut i32
    ) -> Result<usize, Error>;
}

Required methods

fn read_varnum(&mut self) -> Result<u32, Error>

fn read_signed_varnum(&mut self) -> Result<i32, Error>

fn read_maybe_varnum(&mut self) -> Result<Option<u32>, Error>

fn read_varnum_to(&mut self, num: &mut u32) -> Result<usize, Error>

fn read_extended_varnum_to(&mut self, num: &mut u32) -> Result<usize, Error>

As read_varnum_to, but ignore invalid 0s.

Used to implement e.g. read_varfloat.

fn read_extended_signed_varnum_to(
    &mut self,
    num: &mut i32
) -> Result<usize, Error>

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Implementors

impl<T> ReadVarNum for T where
    T: Read, [src]

fn read_varnum(&mut self) -> Result<u32, Error>[src]

use binjs_io::bytes::varnum::*;
use std::io::Cursor;

let source = vec![0];
eprintln!("Test {:?}", source);
assert_eq!(Cursor::new(source).read_varnum().unwrap(), 0);

// This odd encoding of 0 may be reserved as a magic header:
let source = vec![1, 0];
assert!(Cursor::new(source).read_varnum().is_err());

// This odd encoding of 0 may be reserved as a magic header:
let source = vec![1,1,0];
assert!(Cursor::new(source).read_varnum().is_err());

// This odd encoding of 0 may be reserved as a magic header:
let source = vec![1,1,1,0];
assert!(Cursor::new(source).read_varnum().is_err());
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