Struct shadow_rs::host::syscall::io::IoVecWriter

pub struct IoVecWriter<'a, I> { /* private fields */ }

A writer which writes data to IoVec buffers of plugin memory.

If an error occurs while writing (for example if an IoVec points to an invalid memory address), the error will be returned only if no bytes have yet been written. If an error occurs after some bytes have already been written, the Write::write will return how many bytes have been written.

In the future we may want to merge this with MemoryWriterCursor.

Implementations

impl<'a, I> IoVecWriter<'a, I>

pub fn new<'b>( iovs: impl IntoIterator<Item = &'b IoVec, IntoIter = I>, mem: &'a mut MemoryManager, ) -> Self

Trait Implementations

impl<'a, I: Iterator<Item = &'a IoVec>> Write for IoVecWriter<'a, I>

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.