Enum EntryCompression 

#[non_exhaustive]
pub enum EntryCompression {
    Unknown,
    Entry(u64),
    SolidBlockStart(SolidBlock),
    SolidBlockMember,
}

How an archive entry’s data is compressed.

Solid 7z members share one compressed stream, so only the block as a whole has a meaningful ratio; encoding that here keeps a per-file ratio from being computed for them.

Examples

use exarch_core::EntryCompression;

assert_eq!(EntryCompression::Entry(40).compressed_size(), Some(40));
assert_eq!(EntryCompression::Unknown.compressed_size(), None);

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.

Unknown

The format does not expose a compressed size (TAR) or the entry has no data stream (empty 7z files)

Entry(u64)

The entry owns this many compressed bytes (ZIP, 7z single-file block)

SolidBlockStart(SolidBlock)

First file of a solid block; carries the totals of the whole block

SolidBlockMember

Later file of a solid block; its data is accounted to the block start

Implementations

impl EntryCompression

pub const fn compressed_size(&self) -> Option<u64>

Compressed size to report for the entry: the entry’s own size, or the whole block’s size for a solid block start.

pub const fn entry_compressed_size(&self) -> Option<u64>

Compressed size owned by the entry alone, for per-file ratio checks.

Trait Implementations

impl Clone for EntryCompression

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 EntryCompression

impl Debug for EntryCompression

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

Formats the value using the given formatter.

impl Eq for EntryCompression

impl PartialEq for EntryCompression

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for EntryCompression