Struct Compression 

pub struct Compression {
    pub algo: CompressionAlgorithm,
    pub level: i32,
}

Compression specifies how a block should be compressed.

Fields

algo: CompressionAlgorithm

compression algorithm

level: i32

only for zstd, <= 0 use default(3) compression level, 1 - 21 uses the exact level of zstd compression level, >=22 use the largest compression level supported by zstd.

Implementations

impl Compression

pub const fn new() -> Self

Returns a new Compression with the None algorithm.

pub const fn set_level(self, level: i32) -> Self

Set the compression level, only used for zstd compression

pub const fn set_algorithm(self, algo: CompressionAlgorithm) -> Self

Set the compression algorithm

pub const fn lz4() -> Self

Available on crate features lz4 or lz4-std only.

Returns a new Compression with the lz4 algorithm.

pub const fn zstd(level: i32) -> Self

Available on crate feature zstd only.

Returns a new Compression with the Zstd algorithm.

pub const fn snappy() -> Self

Available on crate feature snappy only.

Returns a new Compression with the Snappy algorithm.

pub const fn is_none(&self) -> bool

Returns true if the compression algorithm is None.

pub const fn is_some(&self) -> bool

Returns true if the compression algorithm is not None.

Trait Implementations

impl Clone for Compression

fn clone(&self) -> Compression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Compression

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

Formats the value using the given formatter.

impl Default for Compression

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Compression

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Compression

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 Message for Compression

Available on crate feature prost only.

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError>

where B: BufMut, Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError>

where B: BufMut, Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode<B>(buf: B) -> Result<Self, DecodeError>

where B: Buf, Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError>

where B: Buf, Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError>

where B: Buf, Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError>

where B: Buf, Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for Compression

fn eq(&self, other: &Compression) -> 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 Serialize for Compression

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Compression

impl Eq for Compression

impl StructuralPartialEq for Compression