Enum XlsxPathSource 

pub enum XlsxPathSource {
    SharedFile,
    DirectMmap,
}

Selects the retained backing source used for an XLSX filesystem path.

This policy applies only to path-based Calamine XLSX loads. Byte and reader inputs always retain one shared immutable byte allocation.

Variants

SharedFile

Retain one opened file and serialize physical seeks and reads while giving each XLSX consumer an independent logical cursor.

This mutation-safe option is the default. Renaming or replacing the pathname is safe because the opened handle is retained.

DirectMmap

Retain the opened file and map it read-only.

Mapping is attempted explicitly and errors are returned without falling back to SharedFile. The caller guarantees that the opened underlying file/inode is not destructively modified or truncated for the adapter’s lifetime. Violating this contract can terminate the process; in particular, Unix may deliver SIGBUS when a mapped page past a new end-of-file is accessed. Renaming or replacing the pathname is safe because the original opened handle remains retained.

Trait Implementations

impl Clone for XlsxPathSource

fn clone(&self) -> XlsxPathSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for XlsxPathSource

impl Debug for XlsxPathSource

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

Formats the value using the given formatter.

impl Default for XlsxPathSource

fn default() -> XlsxPathSource

Returns the “default value” for a type.

impl Eq for XlsxPathSource

impl PartialEq for XlsxPathSource

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for XlsxPathSource