Struct Reader 

pub struct Reader<'a> { /* private fields */ }

A cursor over a protobuf-encoded byte slice. Every accessor returns None on a truncated or malformed input rather than panicking.

Implementations

impl<'a> Reader<'a>

pub fn new(buf: &'a [u8]) -> Self

Wrap a byte slice.

pub fn at_end(&self) -> bool

true once every byte has been consumed.

pub fn read_varint(&mut self) -> Option<u64>

Read a base-128 varint (max 10 bytes, i.e. 64 bits). None on truncation or overlong encoding.

pub fn read_tag(&mut self) -> Option<(u32, WireType)>

Read a field tag, returning (field_number, wire_type).

pub fn read_len_delimited(&mut self) -> Option<&'a [u8]>

Read a length-delimited payload (a varint length then that many bytes).

pub fn read_i32(&mut self) -> Option<u32>

Read a fixed 4-byte little-endian value.

pub fn read_i64(&mut self) -> Option<u64>

Read a fixed 8-byte little-endian value.

pub fn skip(&mut self, wt: WireType) -> Option<()>

Skip the payload of a field with the given wire type (for fields the descriptor walker does not care about).