Struct Utf32U32Codec 

pub struct Utf32U32Codec;

Combined UTF-32 u32 code-unit codec.

Utf32U32Codec works with raw UTF-32 scalar-value units rather than serialized bytes. Use crate::Utf32ByteCodec for byte streams with an explicit byte order.

Examples

use qubit_codec_text::{
    CharsetCodec,
    CharsetEncodeProbe,
    Codec,
    Charset,
    Utf32,
    Utf32U32Codec,
};

let codec = Utf32U32Codec;
assert_eq!(Charset::UTF_32, codec.charset());
assert_eq!(Utf32::MAX_UNITS_PER_CHAR, codec.max_units_per_value().get());

let mut output = [0_u32; Utf32::MAX_UNITS_PER_CHAR];
let written = codec.encode_len('中', 0).expect("mappable");
unsafe {
    codec.encode_unchecked(&'中', &mut output, 0).expect("buffer fits");
}
let (value, consumed) = unsafe {
    codec.decode_unchecked(&output[..written], 0).expect("valid UTF-32")
};
assert_eq!(('中', written), (value, consumed.get()));

Implementations

impl Utf32U32Codec

pub const fn charset(self) -> Charset

Returns the UTF-32 encoding descriptor.

Returns

Returns Charset::UTF_32.

Trait Implementations

impl CharsetCodec for Utf32U32Codec

fn charset(&self) -> Charset

Returns UTF-32 charset descriptor.

Returns

Returns Charset::UTF_32.

impl CharsetEncodeProbe for Utf32U32Codec

fn encode_len(&self, _ch: char, _index: usize) -> CharsetEncodeResult<usize>

Encodes one Unicode scalar value into a u32 unit at index.

Arguments

• ch - The Unicode scalar value to encode.
• index - Input character index used for error context.

Returns

Always returns Ok(1).

impl Clone for Utf32U32Codec

fn clone(&self) -> Utf32U32Codec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Codec for Utf32U32Codec

type Value = char

Logical value decoded from or encoded into the buffer.

type Unit = u32

Buffer unit used by the encoded representation.

type DecodeError = CharsetDecodeError

Error reported when decoding malformed units.

type EncodeError = CharsetEncodeError

Error reported when encoding an unsupported value.

fn min_units_per_value(&self) -> NonZeroUsize

Returns the minimum possible unit count for one encoded value.

fn max_units_per_value(&self) -> NonZeroUsize

Returns the maximum non-zero unit count needed to encode or decode one value.

unsafe fn decode_unchecked( &self, input: &[u32], index: usize, ) -> CharsetDecodeResult<(char, NonZeroUsize)>

Decodes one value from input starting at index.

unsafe fn encode_unchecked( &self, ch: &char, output: &mut [u32], index: usize, ) -> CharsetEncodeResult<usize>

Encodes one borrowed value into output starting at index.

impl Copy for Utf32U32Codec

impl Debug for Utf32U32Codec

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

Formats the value using the given formatter.

impl Default for Utf32U32Codec

fn default() -> Utf32U32Codec

Returns the “default value” for a type.

impl Eq for Utf32U32Codec

impl Hash for Utf32U32Codec

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Utf32U32Codec

fn eq(&self, other: &Utf32U32Codec) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Utf32U32Codec