npm package: @stdlib/strided-base-mskunary
Description: Apply a unary callback to elements in a strided input array according to elements in a strided mask array and assign results to elements in a strided output array.
Author: The Stdlib Authors
Latest version: 0.3.1

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<details>
  <summary>
    About stdlib...
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</details>

# mskunary

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Apply a unary callback to elements in a strided input array according to elements in a strided mask array and assign results to elements in a strided output array.

<section class="intro">

</section>

<!-- /.intro -->

<section class="installation">

## Installation

```bash
npm install @stdlib/strided-base-mskunary
```

</section>

<section class="usage">

## Usage

```javascript
var mskunary = require( '@stdlib/strided-base-mskunary' );
```

#### mskunary( arrays, shape, strides, fcn )

Applies a unary callback to elements in a strided input array according to elements in a strided mask array and assigns results to elements in a strided output array.

```javascript
var Float64Array = require( '@stdlib/array-float64' );
var Uint8Array = require( '@stdlib/array-uint8' );
var abs = require( '@stdlib/math-base-special-abs' );

var x = new Float64Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );
var mask = new Uint8Array( [ 0, 0, 0, 1, 0, 0, 0, 1 ] );

// Compute the absolute values in-place:
mskunary( [ x, mask, x ], [ x.length ], [ 1, 1, 1 ], abs );
// x => <Float64Array>[ 2.0, 1.0, 3.0, -5.0, 4.0, 0.0, 1.0, -3.0 ]
```

The function accepts the following arguments:

-   **arrays**: array-like object containing one strided input array, a strided mask array, and one strided output array.
-   **shape**: array-like object containing a single element, the number of indexed elements.
-   **strides**: array-like object containing the stride lengths for the strided arrays.
-   **fcn**: unary function to apply.

The `shape` and `strides` parameters determine which elements in the strided arrays are accessed at runtime. For example, to index every other value in the strided input array and to index the first `N` elements of the strided output array in reverse order,

```javascript
var Float64Array = require( '@stdlib/array-float64' );
var Uint8Array = require( '@stdlib/array-uint8' );
var abs = require( '@stdlib/math-base-special-abs' );

var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );
var mask = new Uint8Array( [ 0, 1, 0, 0, 0, 0 ] );
var y = new Float64Array( [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ] );

mskunary( [ x, mask, y ], [ 3 ], [ 2, 1, -1 ], abs );
// y => <Float64Array>[ 5.0, 0.0, 1.0, 0.0, 0.0, 0.0 ]
```

Note that indexing is relative to the first index. To introduce an offset, use [`typed array`][mdn-typed-array] views.

```javascript
var Float64Array = require( '@stdlib/array-float64' );
var Uint8Array = require( '@stdlib/array-uint8' );
var abs = require( '@stdlib/math-base-special-abs' );

// Initial arrays...
var x0 = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );
var m0 = new Uint8Array( [ 0, 0, 0, 0, 0, 1 ] );
var y0 = new Float64Array( [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ] );

// Create offset views...
var x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
var m1 = new Uint8Array( m0.buffer, m0.BYTES_PER_ELEMENT*3 ); // start at 4th element
var y1 = new Float64Array( y0.buffer, y0.BYTES_PER_ELEMENT*3 ); // start at 4th element

mskunary( [ x1, m1, y1 ], [ 3 ], [ -2, 1, 1 ], abs );
// y0 => <Float64Array>[ 0.0, 0.0, 0.0, 6.0, 4.0, 0.0 ]
```

#### mskunary.ndarray( arrays, shape, strides, offsets, fcn )

Applies a unary callback to elements in a strided input array according to elements in a strided mask array and assigns results to elements in a strided output array using alternative indexing semantics.

```javascript
var Float64Array = require( '@stdlib/array-float64' );
var Uint8Array = require( '@stdlib/array-uint8' );
var abs = require( '@stdlib/math-base-special-abs' );

var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0 ] );
var mask = new Uint8Array( [ 0, 0, 1, 0, 0 ] );
var y = new Float64Array( [ 0.0, 0.0, 0.0, 0.0, 0.0 ] );

mskunary.ndarray( [ x, mask, y ], [ x.length ], [ 1, 1, 1 ], [ 0, 0, 0 ], abs );
// y => <Float64Array>[ 1.0, 2.0, 0.0, 4.0, 5.0 ]
```

The function accepts the following additional arguments:

-   **offsets**: array-like object containing the starting indices (i.e., index offsets) for the strided arrays.

While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying `buffer`, the `offsets` parameter supports indexing semantics based on starting indices. For example, to index every other value in the strided input array starting from the second value and to index the last `N` elements in the strided output array,

<!-- eslint-disable max-len -->

```javascript
var Float64Array = require( '@stdlib/array-float64' );
var Uint8Array = require( '@stdlib/array-uint8' );
var abs = require( '@stdlib/math-base-special-abs' );

var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );
var mask = new Uint8Array( [ 0, 1, 0, 0, 0, 0 ] );
var y = new Float64Array( [ 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ] );

mskunary.ndarray( [ x, mask, y ], [ 3 ], [ 2, 1, -1 ], [ 1, 0, y.length-1 ], abs );
// y => <Float64Array>[ 0.0, 0.0, 0.0, 6.0, 0.0, 2.0 ]
```

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
var bernoulli = require( '@stdlib/random-base-bernoulli' ).factory;
var filledarray = require( '@stdlib/array-filled' );
var filledarrayBy = require( '@stdlib/array-filled-by' );
var mskunary = require( '@stdlib/strided-base-mskunary' );

function add10( x ) {
    return x + 10;
}

var N = 10;

var x = filledarrayBy( N, 'generic', discreteUniform( -100, 100 ) );
console.log( x );

var m = filledarrayBy( N, 'generic', bernoulli( 0.5 ) );
console.log( m );

var y = filledarray( 0.0, N, 'generic' );
console.log( y );

var shape = [ N ];
var strides = [ 1, 1, -1 ];
var offsets = [ 0, 0, N-1 ];

mskunary.ndarray( [ x, m, y ], shape, strides, offsets, add10 );
console.log( y );
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

Character codes for data types:

<!-- The following is auto-generated. Do not manually edit. See scripts/loops.js. -->

<!-- charcodes -->

-   **x**: `bool` (boolean).
-   **c**: `complex64` (single-precision floating-point complex number).
-   **z**: `complex128` (double-precision floating-point complex number).
-   **f**: `float32` (single-precision floating-point number).
-   **d**: `float64` (double-precision floating-point number).
-   **k**: `int16` (signed 16-bit integer).
-   **i**: `int32` (signed 32-bit integer).
-   **s**: `int8` (signed 8-bit integer).
-   **t**: `uint16` (unsigned 16-bit integer).
-   **u**: `uint32` (unsigned 32-bit integer).
-   **b**: `uint8` (unsigned 8-bit integer).

<!-- ./charcodes -->

Function name suffix naming convention:

```text
stdlib_strided_mask_<input_data_type>_<output_data_type>[_as_<callback_arg_data_type>_<callback_return_data_type>]
```

For example,

```c
void stdlib_strided_mask_d_d(...) {...}
```

is a function which accepts one double-precision floating-point strided input array and one double-precision floating-point strided output array. In other words, the suffix encodes the function type signature.

To support callbacks whose input arguments and/or return values are of a different data type than the strided input and/or output array data types, the naming convention supports appending an `as` suffix. For example,

```c
void stdlib_strided_mask_f_f_as_d_d(...) {...}
```

is a function which accepts one single-precision floating-point strided input array and one single-precision floating-point strided output array. However, the callback accepts and returns double-precision floating-point numbers. Accordingly, the input and output values need to be cast using the following conversion sequence

```c
// Convert each input array element to double-precision:
double in1 = (double)x[ i ];

// Evaluate the callback:
double out = f( in1 );

// Convert the callback return value to single-precision:
y[ i ] = (float)out;
```

When the strided input array and the callback (i.e., the input argument and return value) share the same data type, the `as` suffix can be omitted. For example,

<!-- run-disable -->

```c
void stdlib_strided_mask_f_d(...) {...}
```

is a function which accepts one single-precision floating-point strided input array and one double-precision floating-point strided output array. The callback is assumed to accept and return single-precision floating-point numbers. Accordingly, the input and output values are cast according to the following conversion sequence

<!-- run-disable -->

```c
// Retrieve each input array element as single-precision:
float in1 = (float)x[ i ];

// Evaluate the callback:
float out = f( in1 );

// Convert the callback return value to double-precision:
y[ i ] = (double)out;
```

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/strided/base/mskunary.h"
```

<!-- The following is auto-generated. Do not manually edit. See scripts/loops.js. -->

<!-- loops -->

#### stdlib_strided_mask_b_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 1 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_b_as_u_u( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 1 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint32_t fcn( uint32_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_b_as_u_u( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint32_t (*f)(uint32_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_b_as_u_u( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_c( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_c( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_c( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_c_as_b_c( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float32/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex64_t fcn( uint8_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_c_as_b_c( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex64_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_c_as_b_c( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_c_as_c_c( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float32/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex64_t fcn( stdlib_complex64_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_c_as_c_c( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex64_t (*f)(stdlib_complex64_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_c_as_c_c( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_c_as_z_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float64/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex128_t fcn( stdlib_complex128_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_c_as_z_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex128_t (*f)(stdlib_complex128_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_c_as_z_z( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_d( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_d( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_d( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_d_as_b_d( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static double fcn( uint8_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_d_as_b_d( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `double (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_d_as_b_d( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_d_as_d_d( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static double fcn( double x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_d_as_d_d( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `double (*f)(double)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_d_as_d_d( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_f( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_f( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_f( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_f_as_b_f( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static float fcn( uint8_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_f_as_b_f( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `float (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_f_as_b_f( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_f_as_d_d( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static double fcn( double x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_f_as_d_d( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `double (*f)(double)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_f_as_d_d( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_f_as_f_f( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static float fcn( float x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_f_as_f_f( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `float (*f)(float)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_f_as_f_f( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_i( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_i( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_i( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_i_as_b_i( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int32_t fcn( uint8_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_i_as_b_i( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int32_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_i_as_b_i( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_i_as_i_i( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int32_t fcn( int32_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_i_as_i_i( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int32_t (*f)(int32_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_i_as_i_i( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_k_as_b_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int16_t fcn( uint8_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_k_as_b_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int16_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_k_as_b_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_k_as_i_i( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int32_t fcn( int32_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_k_as_i_i( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int32_t (*f)(int32_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_k_as_i_i( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_k_as_k_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int16_t fcn( int16_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_k_as_k_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int16_t (*f)(int16_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_k_as_k_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_t_as_b_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( uint8_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_t_as_b_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_t_as_b_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_t_as_t_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( uint16_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_t_as_t_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)(uint16_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_t_as_t_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_t_as_u_u( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint32_t fcn( uint32_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_t_as_u_u( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint32_t (*f)(uint32_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_t_as_u_u( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_u( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_u( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_u( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_u_as_b_u( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint32_t fcn( uint8_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_u_as_b_u( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint32_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_u_as_b_u( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_u_as_u_u( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint32_t fcn( uint32_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_u_as_u_u( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint32_t (*f)(uint32_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_u_as_u_u( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( uint8_t x ) {
    return x;
}

// Apply the callback:
stdlib_strided_mask_b_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_z( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_z_as_b_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float64/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex128_t fcn( uint8_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_z_as_b_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex128_t (*f)(uint8_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_z_as_b_z( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_b_z_as_z_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float64/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 1, 1, 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex128_t fcn( stdlib_complex128_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_b_z_as_z_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex128_t (*f)(stdlib_complex128_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_b_z_as_z_z( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_c_c( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float32/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 8, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex64_t fcn( stdlib_complex64_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_c_c( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex64_t (*f)(stdlib_complex64_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_c_c( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_c_c_as_z_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float64/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 8, 1, 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex128_t fcn( stdlib_complex128_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_c_c_as_z_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex128_t (*f)(stdlib_complex128_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_c_c_as_z_z( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_c_f_as_c_f( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float32/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 8, 1, 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static float fcn( stdlib_complex64_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_c_f_as_c_f( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `float (*f)(stdlib_complex64_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_c_f_as_c_f( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_c_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float32/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 8, 1, 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex64_t fcn( stdlib_complex64_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_c_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex64_t (*f)(stdlib_complex64_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask_c_z( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_mask_c_z_as_c_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a unary callback to strided input array elements according to a strided mask array and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float64/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t x[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
uint8_t m[] = { 0, 0, 0 };
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { x, m, out };

// Define the strides:
int64_t strides[] = { 8, 1, 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex128_t fcn( stdlib_complex64_t x ) {
    // ...
}

// Apply the callback:
stdlib_strided_mask_c_z_as_c_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose first element is a pointer to a strided input array, whose second element is a pointer to a strided mask array, and whose last element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex128_t (*f)(stdlib_complex64_t)` function to apply provided as a `void` pointer.

```c
void stdlib_strided_mask