Crate read_transform

ReadTransformer is a struct for functional Read objects processing.

It takes Read object, map function and acts as medium Read object.

Example

let mut data = Cursor::new(vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
let mut transformed = ReadTransformer::new(
    &mut data,
    5,
    Box::new(|buffer: &mut [u8], _position, _last_attempt| -> Option<(Vec<u8>, usize)> {
        return Some((
            buffer
                .iter()
                .map(|x| {
                    if x % 2 == 0 {
                        return 0;
                    };
                    return *x;
                })
                .collect::<Vec<_>>(),
            buffer.len(),
        ));
    }),
);
let mut out = vec![0; 10];
transformed.read_exact(&mut out).unwrap();
assert_eq!(out, [1, 0, 3, 0, 5, 0, 7, 0, 9, 0]);

Structs

ReadTransformer

Transforms Read object with function

Traits

TransformableRead

Convenience trait which implemented by all Read objects. Allows chaining of Read objects.

Type Definitions

TransformFn

transform function which takes buffer and returns Vec<u8> and length of processed bytes