Struct CardRewritePlan 

pub struct CardRewritePlan {
    pub header: Header,
    pub copies: Vec<(u64, u64)>,
    pub copies_before_card: usize,
    pub card_offset: u64,
    pub new_len: u64,
}

What a card rewrite does to a file’s layout.

Fields

header: Header

The new header: every section offset fixed, metadata and build info at their new lengths. The content hash is still the old one — rewrite_card writes the new one once it has folded it.

copies: Vec<(u64, u64)>

The sections of the old file copied verbatim, as (old offset, length), in file order — every section the header points at except the card and the build record. They are written back to back, so bytes no section points at (a card an in-place re-card left behind, say) are not copied.

copies_before_card: usize

How many of copies come before the new card: the new card and build record take the old ones’ place in the file order — first on every file the in-RAM writers produce, last on one whose card was placed after the data.

card_offset: u64

Where the new metadata section starts (build info follows it).

new_len: u64

The rewritten file’s length, footer included.

Trait Implementations

impl Clone for CardRewritePlan

fn clone(&self) -> CardRewritePlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CardRewritePlan

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

Formats the value using the given formatter.

impl Eq for CardRewritePlan

impl PartialEq for CardRewritePlan

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CardRewritePlan