Struct MmapNpyArray1I64 

pub struct MmapNpyArray1I64 { /* private fields */ }

Memory-mapped NPY array for i64 values (used for codes).

This struct provides zero-copy access to 1D i64 arrays stored in NPY format.

Implementations

impl MmapNpyArray1I64

pub fn empty() -> Self

Create an empty instance backed by an anonymous mmap (no file).

Used to release file-backed mmap handles before file operations on Windows, where deleting or renaming a memory-mapped file causes OS error 1224.

pub fn from_npy_file(path: &Path) -> Result<Self>

Load a 1D i64 array from an NPY file.

pub fn len(&self) -> usize

Get the length of the array.

pub fn is_empty(&self) -> bool

Returns true if the array is empty.

pub fn slice(&self, start: usize, end: usize) -> Vec<i64>

Get a slice of the data as &i64.

Returns a Vec<i64> instead of &i64 to handle unaligned data safely.

Safety

The caller must ensure start <= end <= len.

pub fn get(&self, idx: usize) -> i64

Get a value at an index.