Enum CompressionMethod 

#[non_exhaustive]
pub enum CompressionMethod {
    Stored,
    Deflated,
    Deflate64,
    Bzip2,
    Aes,
    Zstd,
    Lzma,
    Shrink,
    Reduce(u8),
    Implode,
    Xz,
    Ppmd,
    Unsupported(u16),
}

Identifies the storage format used to compress a file within a ZIP archive.

Each file’s compression method is stored alongside it, allowing the contents to be read without context.

When creating ZIP files, you may choose the method to use with crate::write::FileOptions::compression_method

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Stored

Store the file as is

Deflated

Available on crate feature _deflate-any only.

Compress the file using Deflate

Deflate64

Available on crate feature deflate64 only.

Compress the file using Deflate64. Decoding deflate64 is supported but encoding deflate64 is not supported.

Bzip2

Available on crate feature bzip2 only.

Compress the file using BZIP2

Aes

Available on crate feature aes-crypto only.

Encrypted using AES.

The actual compression method has to be taken from the AES extra data field or from ZipFileData.

Zstd

Available on crate feature zstd only.

Compress the file using ZStandard

Lzma

Available on crate feature lzma only.

Compress the file using LZMA

Shrink

Available on crate feature legacy-zip only.

Method 1 Shrink

Reduce(u8)

Available on crate feature legacy-zip only.

Reduce (Method 2-5)

Implode

Available on crate feature legacy-zip only.

Method 6 Implode/explode

Xz

Available on crate feature xz only.

Compress the file using XZ

Ppmd

Available on crate feature ppmd only.

Compress the file using PPMd

Unsupported(u16)

👎Deprecated since 0.5.7: use the constants instead

Unsupported compression method

Implementations

impl CompressionMethod

All compression methods defined for the ZIP format

pub const STORE: Self = CompressionMethod::Stored

pub const SHRINK: Self = CompressionMethod::Shrink

Available on crate feature legacy-zip only.

pub const REDUCE_1: Self

Available on crate feature legacy-zip only.

Legacy compression method

pub const REDUCE_2: Self

Available on crate feature legacy-zip only.

Legacy compression method

pub const REDUCE_3: Self

Available on crate feature legacy-zip only.

Legacy compression method

pub const REDUCE_4: Self

Available on crate feature legacy-zip only.

Legacy compression method

pub const IMPLODE: Self = CompressionMethod::Implode

Available on crate feature legacy-zip only.

Legacy compression method

pub const DEFLATE: Self = CompressionMethod::Deflated

Available on crate feature _deflate-any only.

pub const DEFLATE64: Self = CompressionMethod::Deflate64

Available on crate feature deflate64 only.

pub const PKWARE_IMPLODE: Self

pub const BZIP2: Self = CompressionMethod::Bzip2

Available on crate feature bzip2 only.

pub const LZMA: Self = CompressionMethod::Lzma

Available on crate feature lzma only.

pub const IBM_ZOS_CMPSC: Self

pub const IBM_TERSE: Self

pub const ZSTD_DEPRECATED: Self

pub const ZSTD: Self = CompressionMethod::Zstd

Available on crate feature zstd only.

pub const MP3: Self

pub const XZ: Self = CompressionMethod::Xz

Available on crate feature xz only.

pub const JPEG: Self

pub const WAVPACK: Self

pub const PPMD: Self = CompressionMethod::Ppmd

Available on crate feature ppmd only.

pub const AES: Self = CompressionMethod::Aes

Available on crate feature aes-crypto only.

impl CompressionMethod

pub const fn from_u16(val: u16) -> CompressionMethod

👎Deprecated since 0.5.7: use a constant to construct a compression method

Converts a u16 to its corresponding CompressionMethod

pub const fn to_u16(self) -> u16

👎Deprecated since 0.5.7: to match on other compression methods, use a constant

Converts a CompressionMethod to a u16

Trait Implementations

impl Clone for CompressionMethod

fn clone(&self) -> CompressionMethod

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompressionMethod

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

Formats the value using the given formatter.

impl Default for CompressionMethod

fn default() -> Self

Returns the “default value” for a type.

impl Display for CompressionMethod

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

Formats the value using the given formatter.

impl PartialEq for CompressionMethod

fn eq(&self, other: &CompressionMethod) -> 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 Copy for CompressionMethod

impl Eq for CompressionMethod

impl StructuralPartialEq for CompressionMethod