141 lines
3.9 KiB
Rust
141 lines
3.9 KiB
Rust
#![cfg(feature = "macros")]
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#![cfg(any(not(Py_LIMITED_API), Py_3_11))]
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use pyo3::{buffer::PyBuffer, exceptions::PyBufferError, ffi, prelude::*};
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use std::{
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ffi::CStr,
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os::raw::{c_int, c_void},
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ptr,
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};
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#[macro_use]
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mod common;
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enum TestGetBufferError {
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NullShape,
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NullStrides,
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IncorrectItemSize,
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IncorrectFormat,
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IncorrectAlignment,
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}
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#[pyclass]
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struct TestBufferErrors {
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buf: Vec<u32>,
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error: Option<TestGetBufferError>,
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}
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#[pymethods]
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impl TestBufferErrors {
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unsafe fn __getbuffer__(
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slf: PyRefMut<'_, Self>,
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view: *mut ffi::Py_buffer,
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flags: c_int,
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) -> PyResult<()> {
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if view.is_null() {
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return Err(PyBufferError::new_err("View is null"));
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}
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if (flags & ffi::PyBUF_WRITABLE) == ffi::PyBUF_WRITABLE {
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return Err(PyBufferError::new_err("Object is not writable"));
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}
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(*view).obj = ffi::_Py_NewRef(slf.as_ptr());
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let bytes = &slf.buf;
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(*view).buf = bytes.as_ptr() as *mut c_void;
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(*view).len = bytes.len() as isize;
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(*view).readonly = 1;
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(*view).itemsize = std::mem::size_of::<u32>() as isize;
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let msg = CStr::from_bytes_with_nul(b"I\0").unwrap();
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(*view).format = msg.as_ptr() as *mut _;
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(*view).ndim = 1;
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(*view).shape = &mut (*view).len;
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(*view).strides = &mut (*view).itemsize;
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(*view).suboffsets = ptr::null_mut();
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(*view).internal = ptr::null_mut();
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if let Some(err) = &slf.error {
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use TestGetBufferError::*;
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match err {
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NullShape => {
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(*view).shape = std::ptr::null_mut();
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}
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NullStrides => {
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(*view).strides = std::ptr::null_mut();
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}
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IncorrectItemSize => {
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(*view).itemsize += 1;
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}
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IncorrectFormat => {
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(*view).format = CStr::from_bytes_with_nul(b"B\0").unwrap().as_ptr() as _;
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}
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IncorrectAlignment => (*view).buf = (*view).buf.add(1),
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}
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}
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Ok(())
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}
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}
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#[test]
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fn test_get_buffer_errors() {
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Python::with_gil(|py| {
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let instance = Py::new(
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py,
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TestBufferErrors {
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buf: vec![0, 1, 2, 3],
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error: None,
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},
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)
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.unwrap();
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assert!(PyBuffer::<u32>::get(instance.as_ref(py)).is_ok());
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instance.borrow_mut(py).error = Some(TestGetBufferError::NullShape);
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assert_eq!(
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PyBuffer::<u32>::get(instance.as_ref(py))
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.unwrap_err()
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.to_string(),
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"BufferError: shape is null"
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);
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instance.borrow_mut(py).error = Some(TestGetBufferError::NullStrides);
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assert_eq!(
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PyBuffer::<u32>::get(instance.as_ref(py))
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.unwrap_err()
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.to_string(),
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"BufferError: strides is null"
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);
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instance.borrow_mut(py).error = Some(TestGetBufferError::IncorrectItemSize);
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assert_eq!(
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PyBuffer::<u32>::get(instance.as_ref(py))
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.unwrap_err()
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.to_string(),
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"BufferError: buffer contents are not compatible with u32"
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);
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instance.borrow_mut(py).error = Some(TestGetBufferError::IncorrectFormat);
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assert_eq!(
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PyBuffer::<u32>::get(instance.as_ref(py))
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.unwrap_err()
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.to_string(),
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"BufferError: buffer contents are not compatible with u32"
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);
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instance.borrow_mut(py).error = Some(TestGetBufferError::IncorrectAlignment);
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assert_eq!(
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PyBuffer::<u32>::get(instance.as_ref(py))
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.unwrap_err()
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.to_string(),
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"BufferError: buffer contents are insufficiently aligned for u32"
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);
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});
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}
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