93 lines
2.4 KiB
Rust
93 lines
2.4 KiB
Rust
#![allow(dead_code, unused_variables)]
|
|
#![feature(proc_macro, specialization, const_fn, const_align_of, const_size_of)]
|
|
|
|
extern crate pyo3;
|
|
|
|
use std::ptr;
|
|
use std::os::raw::{c_int, c_void};
|
|
|
|
use pyo3::*;
|
|
|
|
|
|
#[py::class]
|
|
struct TestClass {
|
|
vec: Vec<u8>,
|
|
token: PyToken,
|
|
}
|
|
|
|
#[py::proto]
|
|
impl class::PyBufferProtocol for TestClass {
|
|
|
|
fn bf_getbuffer(&self, view: *mut ffi::Py_buffer, flags: c_int) -> PyResult<()> {
|
|
if view.is_null() {
|
|
return Err(PyErr::new::<exc::BufferError, _>("View is null"))
|
|
}
|
|
|
|
unsafe {
|
|
(*view).obj = ptr::null_mut();
|
|
}
|
|
|
|
if (flags & ffi::PyBUF_WRITABLE) == ffi::PyBUF_WRITABLE {
|
|
return Err(PyErr::new::<exc::BufferError, _>("Object is not writable"))
|
|
}
|
|
|
|
let bytes = &self.vec;
|
|
|
|
unsafe {
|
|
(*view).buf = bytes.as_ptr() as *mut c_void;
|
|
(*view).len = bytes.len() as isize;
|
|
(*view).readonly = 1;
|
|
(*view).itemsize = 1;
|
|
|
|
(*view).format = ptr::null_mut();
|
|
if (flags & ffi::PyBUF_FORMAT) == ffi::PyBUF_FORMAT {
|
|
let msg = ::std::ffi::CStr::from_ptr("B\0".as_ptr() as *const _);
|
|
(*view).format = msg.as_ptr() as *mut _;
|
|
}
|
|
|
|
(*view).ndim = 1;
|
|
(*view).shape = ptr::null_mut();
|
|
if (flags & ffi::PyBUF_ND) == ffi::PyBUF_ND {
|
|
(*view).shape = (&((*view).len)) as *const _ as *mut _;
|
|
}
|
|
|
|
(*view).strides = ptr::null_mut();
|
|
if (flags & ffi::PyBUF_STRIDES) == ffi::PyBUF_STRIDES {
|
|
(*view).strides = &((*view).itemsize) as *const _ as *mut _;
|
|
}
|
|
|
|
(*view).suboffsets = ptr::null_mut();
|
|
(*view).internal = ptr::null_mut();
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
|
|
#[cfg(Py_3)]
|
|
#[test]
|
|
fn test_buffer() {
|
|
let gil = Python::acquire_gil();
|
|
let py = gil.python();
|
|
|
|
let t = py.init(|t| TestClass{vec: vec![b' ', b'2', b'3'], token: t}).unwrap();
|
|
|
|
let d = PyDict::new(py);
|
|
d.set_item("ob", t).unwrap();
|
|
py.run("assert bytes(ob) == b' 23'", None, Some(d)).unwrap();
|
|
}
|
|
|
|
#[cfg(not(Py_3))]
|
|
#[test]
|
|
fn test_buffer() {
|
|
let gil = Python::acquire_gil();
|
|
let py = gil.python();
|
|
|
|
let t = py.init(|t| TestClass{vec: vec![b' ', b'2', b'3'], token: t}).unwrap();
|
|
|
|
let d = PyDict::new(py);
|
|
d.set_item("ob", t).unwrap();
|
|
py.run("assert memoryview(ob).tobytes() == ' 23'", None, Some(d)).unwrap();
|
|
}
|