[−][src]Trait wasabi_leb128::WriteLeb128

pub trait WriteLeb128<T>: Write {
    fn write_leb128(&mut self, value: T) -> Result<usize>;
}

A trait that extends writers (implementers of the io::Write trait) with a method to write LEB128 encodings of primitive integers.

Required methods

fn write_leb128(&mut self, value: T) -> Result<usize>

Writes a primitive integer value as a variable-length LEB128 byte sequence into self.

If successful, it returns the number of bytes written to self, i.e., the length of the LEB128 encoding of value.

Note that there is no specific error type (just the regular io::Error of the writer) for encoding integers to LEB128, because all primitive integer values can always be represented as a (wide enough) LEB128 byte sequence.

Example

use wasabi_leb128::WriteLeb128;

// Vec<u8> implements io::Write.
let mut buf = Vec::new();
let bytes_written = buf.write_leb128(128u8).unwrap();
assert_eq!(buf, [0x80, 0x01]);
assert_eq!(bytes_written, 2);
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Implementors

impl<W, T> WriteLeb128<T> for W where
    W: Write,
    T: PrimInt,
    T: AsPrimitive<u8>, [src]

Combined implementation for writing signed and unsigned primitive integers as LEB128.

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