Struct WithForeignSource

pub struct WithForeignSource<'src, 'bufs> {
    pub ro_src: Option<&'src [u8]>,
    pub src: &'bufs mut Vec<u8>,
    /* private fields */
}

A utility to do buffer-swapping with, similar to Buffers, but with support for a read-only one-time buffer as source.

Fields

ro_src: Option<&'src [u8]>

The original source buffer, or None if already altered.

src: &'bufs mut Vec<u8>

The source buffer that will be used after the first call to swap.

Implementations

impl WithForeignSource<'_, '_>

pub fn swap(&mut self)

Must be called after every change (i.e. when it’s known that dest was written.

pub fn src_and_dest(&mut self) -> (&[u8], &mut Vec<u8>)

Obtain (source, destination), which reads from the read-only source exactly once.