Struct Base64QuantumCodec 

pub struct Base64QuantumCodec { /* private fields */ }

Encodes and decodes one complete Base64 quantum.

A quantum maps exactly three raw bytes to four Base64 units. It does not handle final short input groups or = padding; callers that process streams must finalize those cases in a transcoder or facade layer.

Implementations

impl Base64QuantumCodec

pub fn standard() -> Self

Creates a standard-alphabet Base64 quantum codec.

Returns

Standard Base64 quantum codec.

pub fn url_safe() -> Self

Creates a URL-safe-alphabet Base64 quantum codec.

Returns

URL-safe Base64 quantum codec.

Trait Implementations

impl Clone for Base64QuantumCodec

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Codec for Base64QuantumCodec

unsafe fn decode( &mut self, input: &[u8], input_index: usize, ) -> Result<([u8; 3], NonZeroUsize), DecodeFailure<Self::DecodeError>>

Decodes one complete four-unit Base64 quantum.

Safety

The caller must provide four readable units at input_index.

unsafe fn encode( &mut self, value: &[u8; 3], output: &mut [u8], output_index: usize, ) -> Result<usize, Self::EncodeError>

Encodes one complete three-byte Base64 quantum.

Safety

The caller must provide four writable output units at output_index.

const MIN_UNITS_PER_VALUE: usize = 4

The minimum possible non-zero readable unit count for one decoded value.

const MAX_ENCODE_UNITS_PER_VALUE: usize = 4

The maximum unit count emitted when encoding one value.

const MAX_DECODE_UNITS_PER_VALUE: usize = 4

The maximum non-zero unit count consumed to decode one value.

type Value = [u8; 3]

The type of logical values decoded from or encoded into the buffer.

type Unit = u8

The type of buffer units used by the encoded representation.

type DecodeError = MiscCodecError

The type of errors reported when decoding malformed units.

type EncodeError = MiscCodecError

The type of errors reported when encoding an unsupported value.

const MAX_ENCODE_RESET_UNITS: usize = 0

The maximum unit count emitted when resetting encode state.

const MAX_ENCODE_FINISH_UNITS: usize = 0

The maximum unit count emitted when finishing encode state at EOF.

const MAX_DECODE_RESET_VALUES: usize = 0

The maximum value count emitted when resetting decode state.

const MAX_DECODE_FINISH_VALUES: usize = 0

The maximum value count emitted when finishing decode state.

fn can_encode_value(&self, _value: &Self::Value) -> bool

Returns whether value is in this codec’s encodable value domain.

fn encode_len(&self, _value: &Self::Value) -> usize

Returns the exact unit count this codec will write when encoding value.

unsafe fn encode_reset( &mut self, _output: &mut [Self::Unit], _output_index: usize, ) -> Result<usize, Self::EncodeError>

Emits stream-start output and resets encode-side state.

unsafe fn encode_finish( &mut self, _output: &mut [Self::Unit], _output_index: usize, ) -> Result<usize, Self::EncodeError>

Emits EOF trailer output and finishes encode-side state.

unsafe fn decode_reset( &mut self, _output: &mut [Self::Value], _output_index: usize, ) -> Result<usize, Self::DecodeError>

Emits stream-start values and resets decode-side state.

unsafe fn decode_eof( &mut self, input: &[Self::Unit], input_index: usize, ) -> Result<(Self::Value, NonZero<usize>), DecodeFailure<Self::DecodeError>>

Decodes one value after the caller has established end of input.

unsafe fn decode_finish( &mut self, _output: &mut [Self::Value], _output_index: usize, ) -> Result<usize, Self::DecodeError>

Finishes decode-side EOF state into output.

impl Copy for Base64QuantumCodec

impl Debug for Base64QuantumCodec

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

Formats the value using the given formatter.

impl Default for Base64QuantumCodec

fn default() -> Self

Creates a standard-alphabet Base64 quantum codec.

impl Eq for Base64QuantumCodec

impl PartialEq for Base64QuantumCodec

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Base64QuantumCodec