Struct PerCodecData

pub struct PerCodecData { /* private fields */ }

Structure representing a PER Codec.

While En(De)coding ASN.1 Types using the APER encoding scheme, the encoded data is stored in a BitVec.

Implementations

impl PerCodecData

pub fn new_aper() -> Self

Default PerCodecData for AperCodec

pub fn new_uper() -> Self

Default PerCodecData for UperCodec

pub fn from_slice_aper(bytes: &[u8]) -> Self

Create Our PerCodecData Structure from a slice of u8 for AperCodec

pub fn from_slice_uper(bytes: &[u8]) -> Self

Create Our PerCodecData Structure from a slice of u8 for UperCodec

pub fn into_bytes(self) -> Vec<u8>

Get’s the inner buffer as a Vec<u8> consuming the struct.

pub fn decode_align(&mut self) -> Result<(), PerCodecError>

Align to 8 bit boundry during decode.

pub fn advance_maybe_err( &mut self, bits: usize, ignore: bool, ) -> Result<(), PerCodecError>

Advance the decode offset by a given number of bits. If there are not enough bits remaining, the behaviour depends on the ignore argument.

• If true, the offset is advanced to the end of the buffer, and Ok is returned.
• If false, the offset is left unchanged, and Err is returned.

pub fn get_inner(&self) -> Result<Vec<u8>, PerCodecError>

pub fn get_key(&self) -> Option<i128>

Get’s the current key value.

This value will be used by a decoder to determine which ‘decode’ function is to be called (for example in an enum, it will be used to determine which variant of the enum will be decoded.

pub fn set_key(&mut self, key: i128)

Sets the current key value.

During decoding ‘open’ types, the ‘key’ used to decode the type further is determined by a key_value field. ie. a field with attribute key_value set in a struct (derived from a SEQUENCE ASN.1 type.) This value is passed to the ‘decoder’ logic further through set_key function, which updates the internal state of the decoder data.

pub fn dump(&self)

Dump current ‘offset’.

pub fn dump_encode(&self)

pub fn reserve(&mut self, count: usize)

Reserve certain bits at the current offset.

pub fn seek(&mut self, offset: usize)

seek pointer to the offset in the internal buffer

pub fn swap_bits(&mut self, other: &mut BitSlice<u8, Msb0>, offset: usize)

pub fn set_bit(&mut self, index: usize, value: bool)

pub fn length_in_bytes(&self) -> usize

Get the length of the data in bytes This is useful when encoding an open type.

pub fn append_aligned(&mut self, other: &mut Self)

Append one encoding to another preserving byte alignment. This is useful when encoding an open type.

Trait Implementations

impl Debug for PerCodecData

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PerCodecData

fn default() -> PerCodecData

Returns the “default value” for a type.