Enum FileData 

pub enum FileData {
    Memory(Vec<u8>),
    Spool {
        spool: Arc<Mutex<File>>,
        offset: u64,
        len: u64,
    },
}

File content storage — either in-memory for small files or spooled to disk for large files to keep memory usage bounded.

Variants

Memory(Vec<u8>)

Small file content held in memory.

Spool

Large file content written to a shared spool file on disk. Multiple FileData::Spool entries can reference different regions of the same underlying spool file via Arc.

Fields

spool: Arc<Mutex<File>>

offset: u64

len: u64

Implementations

impl FileData

pub fn len(&self) -> usize

Total byte length of the file content.

pub fn is_empty(&self) -> bool

pub fn read_all(&self) -> Result<Vec<u8>>

Read the entire content into memory. For Memory variant this clones; for Spool this reads from disk.

pub fn as_bytes(&self) -> Option<&[u8]>

Borrow the in-memory bytes directly (only for Memory variant).

pub fn write_to(&self, out: &mut impl Write) -> Result<()>

Write content to an output writer, reading from spool if needed. Avoids loading the entire file into memory for large spooled files.

pub fn write_range( &self, start: usize, len: usize, out: &mut impl Write, ) -> Result<()>

Write a byte range of the content to an output writer.

Trait Implementations

impl Clone for FileData

fn clone(&self) -> FileData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FileData

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

Formats the value using the given formatter.

impl PartialEq for FileData

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