Struct MappedFile 

pub struct MappedFile { /* private fields */ }

A memory-buffered view of a file, providing mmap-like random-access semantics.

Implementations

impl MappedFile

pub fn open(path: impl AsRef<Path>) -> Result<Self, StreamingError>

Opens path and loads its entire contents into memory.

Errors

Returns StreamingError on any I/O failure.

pub fn read_range( &self, start: u64, len: usize, ) -> Result<&[u8], StreamingError>

Returns a slice covering bytes [start, start + len).

Errors

Returns an error if the requested range falls outside the file.

pub fn as_slice(&self) -> &[u8]

Returns a slice of all file bytes.

pub fn file_size(&self) -> u64

Returns the file size in bytes.

pub fn path(&self) -> &Path

Returns the path used to open this file.

pub fn is_empty(&self) -> bool

Returns true if the file contains no bytes.

pub fn read_ranges( &self, ranges: &[(u64, usize)], ) -> Vec<Result<&[u8], StreamingError>>

Reads multiple (start, len) ranges simultaneously.

The returned Vec preserves the order of the input slice.