Update crate with new APIs added for upstream 3.8 release

- max ragged API, docs and example

- API for cov, var & stdev fns that accept bias enum

- bitwise complement

Author: 9prady9

src/algorithm/mod.rs

@@ -133,6 +133,13 @@ extern "C" {
         dim: c_int,
         nan_val: c_double,
     ) -> c_int;
+    fn af_max_ragged(
+        val_out: *mut af_array,
+        idx_out: *mut af_array,
+        input: af_array,
+        ragged_len: af_array,
+        dim: c_int,
+    ) -> c_int;
 }
 
 macro_rules! dim_reduce_func_def {
@@ -1440,6 +1447,66 @@ dim_reduce_by_key_nan_func_def!(
     ValueType::ProductOutType
 );
 
+/// Max reduction along given axis as per ragged lengths provided
+///
+/// # Parameters
+///
+/// - `input` contains the input values to be reduced
+/// - `ragged_len` array containing number of elements to use when reducing along `dim`
+/// - `dim` is the dimension along which the max operation occurs
+///
+/// # Return Values
+///
+/// Tuple of Arrays:
+/// - First element: An Array containing the maximum ragged values in `input` along `dim`
+///                  according to `ragged_len`
+/// - Second Element: An Array containing the locations of the maximum ragged values in
+///                   `input` along `dim` according to `ragged_len`
+///
+/// # Examples
+/// ```rust
+/// use arrayfire::{Array, dim4, print, randu, max_ragged};
+/// let vals: [f32; 6] = [1.0f32, 2.0, 3.0, 4.0, 5.0, 6.0];
+/// let rlens: [u32; 2] = [9, 2];
+/// let varr = Array::new(&vals, dim4![3, 2]);
+/// let rarr = Array::new(&rlens, dim4![1, 2]);
+/// print(&varr);
+/// // 1 4
+/// // 2 5
+/// // 3 6
+/// print(&rarr); // numbers of elements to participate in reduction along given axis
+/// // 9 2
+/// let (out, idx) = max_ragged(&varr, &rarr, 0);
+/// print(&out);
+/// // 3 5
+/// print(&idx);
+/// // 2 1 //Since 3 is max element for given length 9 along first column
+///        //Since 5 is max element for given length 2 along second column
+/// ```
+pub fn max_ragged<T>(
+    input: &Array<T>,
+    ragged_len: &Array<u32>,
+    dim: i32,
+) -> (Array<T::InType>, Array<u32>)
+where
+    T: HasAfEnum,
+    T::InType: HasAfEnum,
+{
+    unsafe {
+        let mut out_vals: af_array = std::ptr::null_mut();
+        let mut out_idxs: af_array = std::ptr::null_mut();
+        let err_val = af_max_ragged(
+            &mut out_vals as *mut af_array,
+            &mut out_idxs as *mut af_array,
+            input.get(),
+            ragged_len.get(),
+            dim,
+        );
+        HANDLE_ERROR(AfError::from(err_val));
+        (out_vals.into(), out_idxs.into())
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::super::core::c32;

src/core/arith.rs

@@ -3,7 +3,7 @@ use super::data::{constant, tile, ConstGenerator};
 use super::defines::AfError;
 use super::dim4::Dim4;
 use super::error::HANDLE_ERROR;
-use super::util::{af_array, HasAfEnum, ImplicitPromote};
+use super::util::{af_array, HasAfEnum, ImplicitPromote, IntegralType};
 use num::Zero;
 
 use libc::c_int;
@@ -97,6 +97,7 @@ extern "C" {
     fn af_iszero(out: *mut af_array, arr: af_array) -> c_int;
     fn af_isinf(out: *mut af_array, arr: af_array) -> c_int;
     fn af_isnan(out: *mut af_array, arr: af_array) -> c_int;
+    fn af_bitnot(out: *mut af_array, arr: af_array) -> c_int;
 }
 
 /// Enables use of `!` on objects of type [Array](./struct.Array.html)
@@ -1008,3 +1009,16 @@ where
         sub(&cnst, &self, true)
     }
 }
+
+/// Perform bitwise complement on all values of Array
+pub fn bitnot<T: HasAfEnum>(input: &Array<T>) -> Array<T>
+where
+    T: HasAfEnum + IntegralType,
+{
+    unsafe {
+        let mut temp: af_array = std::ptr::null_mut();
+        let err_val = af_bitnot(&mut temp as *mut af_array, input.get());
+        HANDLE_ERROR(AfError::from(err_val));
+        temp.into()
+    }
+}

src/core/util.rs

@@ -827,3 +827,15 @@ impl Fromf64 for i16  { fn fromf64(value: f64) -> Self { value as Self }}
 impl Fromf64 for u8   { fn fromf64(value: f64) -> Self { value as Self }}
 #[rustfmt::skip]
 impl Fromf64 for bool { fn fromf64(value: f64) -> Self { value > 0.0   }}
+
+/// Trait qualifier for given type indicating computability of covariance
+pub trait IntegralType {}
+
+impl IntegralType for i64 {}
+impl IntegralType for u64 {}
+impl IntegralType for i32 {}
+impl IntegralType for u32 {}
+impl IntegralType for i16 {}
+impl IntegralType for u16 {}
+impl IntegralType for u8 {}
+impl IntegralType for bool {}