Struct CompressionConfig 

pub struct CompressionConfig {
    pub level: i32,
    pub window_log: u32,
    pub checksum: bool,
    pub content_size: bool,
    pub dict_id: bool,
    pub format: FrameFormat,
}

Every compression setting, stated explicitly by the caller. Use one of the named presets or build your own; there is no implicit default.

Fields

level: i32

zstd level: MIN_LEVEL..=MAX_LEVEL, excluding 0. Levels mean what they mean in zstd.

window_log: u32

Upper bound on the window (log2 bytes, 10..=30). The window also shrinks to fit the input.

checksum: bool

Append the XXH64-based content checksum.

content_size: bool

Record the content size in the frame header.

dict_id: bool

Record the dictionary ID in the frame header (when the dictionary has one).

format: FrameFormat

Standard frames, or magicless ones (4 bytes smaller; the decoder must be told).

Implementations

impl CompressionConfig

pub const FAST: CompressionConfig

zstd level 1: fastest.

pub const DEFAULT: CompressionConfig

zstd level 3: the reference default.

pub const HIGH: CompressionConfig

zstd level 19: optimal parsing.

pub const MESSAGE: CompressionConfig

Small-message profile: level 3, no dictionary ID (the ID is known out of band).

pub fn validate(&self) -> Result<()>

Checks every field’s range.

Trait Implementations

impl Clone for CompressionConfig

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CompressionConfig

impl Debug for CompressionConfig

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

Formats the value using the given formatter.

impl Eq for CompressionConfig

impl PartialEq for CompressionConfig

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CompressionConfig