Struct Slicer 

pub struct Slicer<'de> { /* private fields */ }

Takes a slice as input and divides it into smaller slices. This processes the slice from start to end by user-provided len sized chunks.

For example &[1, 2, 3, 4] --> &[1, 2] and &[3, 4].

Uses:

• When you know the length to slice at runtime but not compile time.
• When parsing formats within formats. For example, the DHCP format has an options field that contains TLV formatted options. See options/options.rs.

Implementations

impl<'de> Slicer<'de>

pub fn new(input: &'de [u8]) -> Self

Creates an instance of Slicer.

pub fn slice(&mut self, len: usize) -> Option<&'de [u8]>

Returns the next len number of bytes and changes the current position the same amount.

Returns an Option instead of panicking. Use slice_unchecked if it is okay to panic.

pub fn slice_unchecked(&mut self, len: usize) -> &'de [u8]

Returns the next len number of bytes and changes the current position the same amount.

Can panic if slicing past array length. Use slice for no panic.

pub fn slice_remainder(&mut self) -> &'de [u8]

Returns the remaining bytes in the input and resets the current position to the start.

pub fn reset(&mut self)

Slicer keeps track of how many bytes have been sliced (the position from start). This resets that internal state.