Trait DataWriter 

pub trait DataWriter {
    // Required methods
    fn reserve(&mut self, size: u64) -> Result<(), ParsingError>;
    fn append(&mut self, bytes: &[u8]) -> Result<(), ParsingError>;
    fn pad_to(&mut self, target_size: u64) -> Result<(), ParsingError>;
}

An abstraction over an appendable buffer for reading out files.

Required Methods

fn reserve(&mut self, size: u64) -> Result<(), ParsingError>

Reserves size in the underlying buffer.

Does not affect the write offset within the buffer.

fn append(&mut self, bytes: &[u8]) -> Result<(), ParsingError>

Appends bytes to the buffer.

The internal write offset is incremented by bytes.len(). Partial writes must return an error.

fn pad_to(&mut self, target_size: u64) -> Result<(), ParsingError>

Pads the buffer to target_size.

Moves the buffer’s write offset forward to target_size filling with zeroes. Returns an error if the write offset is larger than target_size.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl DataWriter for Vec<u8>

fn reserve(&mut self, size: u64) -> Result<(), ParsingError>

fn append(&mut self, bytes: &[u8]) -> Result<(), ParsingError>

fn pad_to(&mut self, target_size: u64) -> Result<(), ParsingError>

Implementors

impl DataWriter for VmoWriter

Available on Fuchsia only.