Replace std::os::raw with std::ffi (#540)

Author: mattiapenati

src/array.rs

@@ -3,10 +3,9 @@
 //! [ndarray]: https://numpy.org/doc/stable/reference/arrays.ndarray.html
 
 use std::{
+    ffi::{c_int, c_void},
     marker::PhantomData,
-    mem,
-    os::raw::{c_int, c_void},
-    ptr, slice,
+    mem, ptr, slice,
 };
 
 use ndarray::{

src/borrow/shared.rs

@@ -1,7 +1,6 @@
 use std::collections::hash_map::Entry;
-use std::ffi::{c_void, CString};
+use std::ffi::{c_char, c_int, c_void, CString};
 use std::mem::forget;
-use std::os::raw::{c_char, c_int};
 use std::ptr::NonNull;
 use std::slice::from_raw_parts;
 use std::sync::Mutex;

src/convert.rs

@@ -1,6 +1,6 @@
 //! Defines conversion traits between Rust types and NumPy data types.
 
-use std::{mem, os::raw::c_int, ptr};
+use std::{ffi::c_int, mem, ptr};
 
 use ndarray::{ArrayBase, Data, Dim, Dimension, IntoDimension, Ix1, OwnedRepr};
 use pyo3::{Bound, Python};

src/dtype.rs

@@ -1,5 +1,5 @@
+use std::ffi::{c_int, c_long, c_longlong, c_short, c_uint, c_ulong, c_ulonglong, c_ushort};
 use std::mem::size_of;
-use std::os::raw::{c_int, c_long, c_longlong, c_short, c_uint, c_ulong, c_ulonglong, c_ushort};
 use std::ptr;
 
 #[cfg(feature = "half")]

src/strings.rs

@@ -4,9 +4,9 @@
 //! [ucs4]: https://numpy.org/doc/stable/reference/c-api/dtype.html#c.NPY_UNICODE
 
 use std::collections::hash_map::Entry;
+use std::ffi::c_char;
 use std::fmt;
 use std::mem::size_of;
-use std::os::raw::c_char;
 use std::str;
 use std::sync::Mutex;