feat: add math/base/special/gcdf

lib/node_modules/@stdlib/math/base/special/gcdf/README.md

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+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2024 The Stdlib Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-->
+
+# gcdf
+
+> Compute the [greatest common divisor][gcd] (gcd) of two single-precision floating point numbers.
+
+<!-- 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">
+
+The [greatest common divisor][gcd] (gcd) of two non-zero integers `a` and `b` is the largest positive integer which divides both `a` and `b` without a remainder. The gcd is also known as the **greatest common factor** (gcf), **highest common factor** (hcf), **highest common divisor**, and **greatest common measure** (gcm).
+
+</section>
+
+<!-- /.intro -->
+
+<!-- Package usage documentation. -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var gcdf = require( '@stdlib/math/base/special/gcdf' );
+```
+
+#### gcdf( a, b )
+
+Computes the [greatest common divisor][gcd] (gcd).
+
+```javascript
+var v = gcdf( 48, 18 );
+// returns 6
+```
+
+If both `a` and `b` are `0`, the function returns `0`.
+
+```javascript
+var v = gcdf( 0, 0 );
+// returns 0
+```
+
+Both `a` and `b` must have integer values; otherwise, the function returns `NaN`.
+
+```javascript
+var v = gcdf( 3.14, 18 );
+// returns NaN
+
+v = gcdf( 48, 3.14 );
+// returns NaN
+
+v = gcdf( NaN, 18 );
+// returns NaN
+
+v = gcdf( 48, NaN );
+// returns NaN
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- Package usage examples. -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var gcdf = require( '@stdlib/math/base/special/gcdf' );
+
+var a = discreteUniform( 100, 0, 50 );
+var b = discreteUniform( a.length, 0, 50 );
+
+var i;
+for ( i = 0; i < a.length; i++ ) {
+    console.log( 'gcdf(%d,%d) = %d', a[ i ], b[ i ], gcdf( a[ i ], b[ i ] ) );
+}
+```
+
+</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">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- C usage documentation. -->
+
+<section class="usage">
+
+### Usage
+
+```c
+#include "stdlib/math/base/special/gcdf.h"
+```
+
+#### stdlib_base_gcdf( a, b )
+
+Computes the greatest common divisor (gcd).
+
+```c
+float v = stdlib_base_gcdf( 48.0f, 18.0f );
+// returns 6.0f
+```
+
+The function accepts the following arguments:
+
+-   **a**: `[in] float` input value.
+-   **b**: `[in] float` input value.
+
+```c
+float stdlib_base_gcdf( const float a, const float b );
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- C API usage examples. -->
+
+<section class="examples">
+
+### Examples
+
+```c
+#include "stdlib/math/base/special/gcdf.h"
+#include <stdio.h>
+
+int main( void ) {
+    const float a[] = { 24.0f, 32.0f, 48.0f, 116.0f, 33.0f };
+    const float b[] = { 12.0f, 6.0f, 15.0f, 52.0f, 22.0f };
+
+    float out;
+    int i;
+    for ( i = 0; i < 5; i++ ) {
+        out = stdlib_base_gcdf( a[ i ], b[ i ] );
+        printf( "gcdf(%f, %f) = %f\n", a[ i ], b[ i ], out );
+    }
+}
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
+<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="references">
+
+## References
+
+-   Stein, Josef. 1967. "Computational problems associated with Racah algebra." _Journal of Computational Physics_ 1 (3): 397–405. doi:[10.1016/0021-9991(67)90047-2][@stein:1967].
+
+</section>
+
+<!-- /.references -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+[gcd]: https://en.wikipedia.org/wiki/Greatest_common_divisor
+
+[@stein:1967]: https://doi.org/10.1016/0021-9991(67)90047-2
+
+<!-- <related-links> -->
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/math/base/special/gcdf/benchmark/benchmark.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var pkg = require( './../package.json' ).name;
+var gcdf = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var x;
+	var y;
+	var z;
+	var i;
+
+	x = discreteUniform( 100, 1.0, 100.0 );
+	y = discreteUniform( 100, 1.0, 100.0 );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		z = gcdf( x[ i%x.length ], y[ i%y.length ] );
+		if ( isnanf( z ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnanf( z ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/math/base/special/gcdf/benchmark/benchmark.native.js

@@ -0,0 +1,63 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var gcdf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( gcdf instanceof Error )
+};
+
+
+// MAIN //
+
+bench( pkg+'::native', opts, function benchmark( b ) {
+	var x;
+	var y;
+	var z;
+	var i;
+
+	x = discreteUniform( 100, 1.0, 100.0 );
+	y = discreteUniform( 100, 1.0, 100.0 );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		z = gcdf( x[ i%x.length ], y[ i%y.length ] );
+		if ( isnanf( z ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnanf( z ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});