Struct CParameter 

pub struct CParameter(/* private fields */);

Available on async_compression_unstable and crate feature zstd-mzstd only.

A compression parameter for the mzstd backend. This is a stable wrapper around mzstd’s own encoder configuration, to abstract over different versions of the mzstd library.

As with the zstd backend, a value of 0 selects the default for the parameter, and the last value given for a parameter wins.

See the zstd documentation for more information on these parameters.

Implementations

impl CParameter

pub fn quality(level: Level) -> i32

pub fn window_log(value: u32) -> CParameter

Window size in bytes (as a power of two)

pub fn hash_log(value: u32) -> CParameter

Size of the initial probe table in 4-byte entries (as a power of two)

pub fn chain_log(value: u32) -> CParameter

Size of the multi-probe table in 4-byte entries (as a power of two)

pub fn search_log(value: u32) -> CParameter

Number of search attempts (as a power of two)

pub fn min_match(value: u32) -> CParameter

Minimum size of matches searched for

pub fn target_length(value: u32) -> CParameter

Strategy-dependent length modifier

pub fn enable_long_distance_matching(value: bool) -> CParameter

Enable long-distance matching mode to look for and emit long-distance references.

This increases the default window size.

pub fn ldm_hash_log(value: u32) -> CParameter

Size of the long-distance matching table (as a power of two)

Only used when long-distance matching is explicitly enabled.

pub fn ldm_min_match(value: u32) -> CParameter

Minimum size of long-distance matches searched for

Only used when long-distance matching is explicitly enabled.

pub fn ldm_bucket_size_log(value: u32) -> CParameter

Size of each bucket in the LDM hash table for collision resolution (as a power of two)

Only used when long-distance matching is explicitly enabled.

pub fn ldm_hash_rate_log(value: u32) -> CParameter

Frequency of using the LDM hash table (as a power of two)

Only used when long-distance matching is explicitly enabled.

pub fn content_size_flag(value: bool) -> CParameter

Emit the size of the content (default: true).

pub fn checksum_flag(value: bool) -> CParameter

Emit a checksum (default: false).

Trait Implementations

impl Clone for CParameter

fn clone(&self) -> CParameter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CParameter

impl Debug for CParameter

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

Formats the value using the given formatter.

impl Eq for CParameter

impl PartialEq for CParameter

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CParameter