Struct CardAppendPlan 

pub struct CardAppendPlan {
    pub header: Header,
    pub card_offset: u64,
    pub old_len: u64,
    pub dead_bytes: u64,
    pub old_head: Vec<u8>,
}

What placing a new card after a file’s data does to its layout — see “The card after the data” in the module docs.

Fields

header: Header

The new header: the metadata section at card_offset, no build-info section yet (its length is only known when the record is sealed, after the hash — commit_card_append fills it), every other section where it was, and still the old content hash.

card_offset: u64

Where the new card starts: the file’s end as its header records it (in place — past the old footer, so the old file stays whole), or the old footer itself (a fresh file nobody has read yet, so no gap).

old_len: u64

The file’s length as its own header records it (Header::expected_file_len).

dead_bytes: u64

The bytes no section points at once the plan is committed: the old card and build record, and — in place — the old 4-byte footer.

old_head: Vec<u8>

The header bytes the plan was made from. commit_card_append refuses a file whose header no longer reads exactly this.

Trait Implementations

impl Clone for CardAppendPlan

fn clone(&self) -> CardAppendPlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CardAppendPlan

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

Formats the value using the given formatter.

impl Eq for CardAppendPlan

impl PartialEq for CardAppendPlan

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CardAppendPlan