Module conversions 

Conversion utilities between ndarray and OxiBLAS types.

This module provides two distinct kinds of conversions between ndarray’s Array2/ArrayView2/ArrayViewMut2 and OxiBLAS’s Mat/MatRef/MatMut types, and it is important not to confuse them:

• Genuinely zero-copy views: array_view_to_mat_ref, array_view_to_mat_ref_or_transposed, array_view_mut_to_mat_mut, array_viewd_to_mat_ref, array_viewd_to_mat_ref_or_transposed, and array_view_mutd_to_mat_mut wrap the source array’s existing buffer in a borrowing MatRef/MatMut - no allocation, no element copy - whenever the array is contiguous along one axis with a non-negative stride. They return None for layouts that cannot be represented this way (non-contiguous, or a reversed/negative-stride axis, which MatRef/MatMut do not support).
• Copying conversions: array2_to_mat, array2_into_mat, arrayd_to_mat, arrayd_into_mat, mat_to_array2, mat_to_array2_c, mat_ref_to_array2, mat_to_arrayd, and mat_ref_to_arrayd always allocate a brand-new buffer and copy every element. Mat’s storage (AlignedVec) is always a distinct, cache-line-aligned allocation with a possibly-padded column stride (see oxiblas_matrix::Mat’s memory layout docs), so it can never adopt/reuse an ndarray::Array2’s Vec-backed buffer - regardless of whether the source array happens to already be column-major. If you need a real zero-copy path, work with MatRef/MatMut via the view conversions above instead of Mat.

Functions

array1_to_vec

Converts an ndarray Array1 to a Vec.

array2_into_mat

Converts an ndarray Array2 to an OxiBLAS Mat, consuming the array.

array2_to_arrayd

Converts an Array2 to an ArrayD.

array2_to_mat

Converts an ndarray Array2 to an OxiBLAS Mat by copying every element.

array_view1_as_slice

Gets a slice from an ArrayView1 if contiguous.

array_view1_as_slice_mut

Gets a mutable slice from an ArrayViewMut1 if contiguous.

array_view_mut_to_mat_mut

Creates a MatMut view from an ndarray ArrayViewMut2.

array_view_mutd_to_mat_mut

Creates a MatMut view from an ndarray ArrayViewMutD.

array_view_to_mat_ref

Creates a MatRef view from an ndarray ArrayView2.

array_view_to_mat_ref_or_transposed

Creates a MatRef view from an ndarray ArrayView2, handling row-major layout by returning a transposed view if needed.

array_viewd_to_mat_ref

Creates a MatRef view from an ndarray ArrayViewD.

array_viewd_to_mat_ref_or_transposed

Creates a MatRef view from an ndarray ArrayViewD, handling row-major layout.

arrayd_into_mat

Converts an ndarray ArrayD to an OxiBLAS Mat, consuming the array.

arrayd_to_array2

Converts an ArrayD to an Array2.

arrayd_to_mat

Converts an ndarray ArrayD (dynamic dimension) to an OxiBLAS Mat.

filled_f

Creates a column-major Array2 filled with a value.

is_column_major

Checks if an Array2 is in column-major (Fortran) order.

is_row_major

Checks if an Array2 is in row-major (C) order.

mat_ref_to_array2

Converts an OxiBLAS MatRef to an ndarray Array2.

mat_ref_to_arrayd

Converts an OxiBLAS MatRef to an ndarray ArrayD.

mat_to_array2

Converts an OxiBLAS Mat to an ndarray Array2.

mat_to_array2_c

Converts an OxiBLAS Mat to a row-major ndarray Array2.

mat_to_arrayd

Converts an OxiBLAS Mat to an ndarray ArrayD.

slice_to_array1

Converts a slice to an ndarray Array1.

to_column_major

Converts a row-major Array2 to column-major.

zeros_f

Creates a column-major Array2 (Fortran order).