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This change adds the exported PyBuffer_FillContiguousStrides function. For positive dimensions, it fills strides using wrapping multiplication. It traverses dimensions forward for order 'F' and backward for other order values. For nonpositive dimensions, it returns without accessing pointers.

Changes: Buffer strides

Layer / File(s)	Summary
Stride calculation and validation crates/capi/src/pybuffer.rs	Adds PyBuffer_FillContiguousStrides and tests C-order, Fortran-order, fallback-order, zero-sized dimensions, aliased pointers, and nonpositive dimensions.

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Possibly related issues

• C-API tracking: missing Stable ABI functions in crates/capi #8156: This issue lists PyBuffer_FillContiguousStrides as a missing Stable ABI function. This change adds that function.

Suggested reviewers: bschoenmaeckers, youknowone

Merge Risk: Minimal · up to c2cfa

The stride-filling implementation has no identified merge-blocking defect and is ready to merge subject to normal checks.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentat…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely identifies the main change: adding PyBuffer_FillContiguousStrides to the C API.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 1 functions across 1 files.

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

Generate unit tests (beta)

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