IronLanguages / IronLanguages/ironpython3

ctypes .from_buffer only works for array.array

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module-ctypes
Dominant language
C#
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Merged PRs (30d)
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Description

The .from_buffer[_copy] methods of ctypes types only accept an array.array argument. Other implementations such as cpython, pypy also accept bytes, bytearray, mmap, memoryview etc.

The struct and re module accept a wider variety of buffer-like objects. Strangely, re accepts mmap objects, but stuct does not.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at the ctypes .from_buffer and .from_buffer_copy entry points and compare their accepted inputs with array.array, bytes, bytearray, mmap, and memoryview; inspect the existing struct and re behavior noted in the issue. Done means both methods accept the intended buffer-like objects consistently.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, python
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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