feat: add number/uint64/base/get-low-word

lib/node_modules/@stdlib/number/uint64/base/get-low-word/README.md

@@ -0,0 +1,100 @@
+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2026 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.
+
+-->
+
+# Low Word
+
+> Return a 32-bit unsigned integer corresponding to the low 32-bit word of a [64-bit unsigned integer][@stdlib/number/uint64/ctor].
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var getLowWord = require( '@stdlib/number/uint64/base/get-low-word' );
+```
+
+#### getLowWord( a )
+
+Returns a 32-bit unsigned integer corresponding to the low 32-bit word of a [64-bit unsigned integer][@stdlib/number/uint64/ctor].
+
+```javascript
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+
+var a = new Uint64( 4294967296 );
+var w = getLowWord( a );
+// returns 0
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+var getLowWord = require( '@stdlib/number/uint64/base/get-low-word' );
+
+var a = new Uint64( 4294967296 );
+console.log( getLowWord( a ) );
+// => 0
+
+a = new Uint64( 0xffffffff );
+console.log( getLowWord( a ) );
+// => 4294967295
+
+a = new Uint64( 0x123400005678 );
+console.log( getLowWord( a ) );
+// => 22136
+
+a = Uint64.of( 1234, 5678 );
+console.log( getLowWord( a ) );
+// => 5678
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- 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">
+
+[@stdlib/number/uint64/ctor]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/number/uint64/ctor
+
+<!-- <related-links> -->
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/number/uint64/base/get-low-word/benchmark/benchmark.js

@@ -0,0 +1,66 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 isnan = require( '@stdlib/assert/is-nan' ).isPrimitive;
+var bench = require( '@stdlib/bench' );
+var MAX_SAFE_INTEGER = require( '@stdlib/constants/float64/max-safe-integer' );
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
+var pkg = require( './../package.json' ).name;
+var getLowWord = require( './../lib' );
+
+
+// VARIABLES //
+
+var rand = discreteUniform.factory( 0, MAX_SAFE_INTEGER );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var values;
+	var N;
+	var a;
+	var i;
+	var w;
+
+	N = 100;
+	values = [];
+	for ( i = 0; i < N; i++ ) {
+		values.push( new Uint64( rand() ) );
+	}
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		a = values[ i % N ];
+		w = getLowWord( a );
+		if ( isnan( w ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnan( w ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/number/uint64/base/get-low-word/docs/repl.txt

@@ -0,0 +1,25 @@
+
+{{alias}}( a )
+    Returns a 32-bit unsigned integer corresponding to the low 32-bit word of a
+    64-bit unsigned integer.
+
+    Parameters
+    ----------
+    a: Uint64
+        Input value.
+
+    Returns
+    -------
+    out: integer
+        Lower order word (32-bit unsigned integer).
+
+    Examples
+    --------
+    > var a = new {{alias:@stdlib/number/uint64/ctor}}( 4294967296 )
+    <Uint64>[ 4294967296n ]
+    > var w = {{alias}}( a )
+    0
+
+    See Also
+    --------
+

lib/node_modules/@stdlib/number/uint64/base/get-low-word/docs/types/index.d.ts

@@ -0,0 +1,43 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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.
+*/
+
+// TypeScript Version: 4.1
+
+/// <reference types="@stdlib/types"/>
+
+import { Uint64 } from '@stdlib/types/number';
+
+/**
+* Returns a 32-bit unsigned integer corresponding to the low 32-bit word of a 64-bit unsigned integer.
+*
+* @param a - input value
+* @returns lower order word (32-bit unsigned integer)
+*
+* @example
+* var Uint64 = require( '@stdlib/number/uint64/ctor' );
+*
+* var a = new Uint64( 4294967296 );
+* var w = getLowWord( a );
+* // returns 0
+*/
+declare function getLowWord( a: Uint64 ): number;
+
+
+// EXPORTS //
+
+export = getLowWord;

lib/node_modules/@stdlib/number/uint64/base/get-low-word/docs/types/test.ts

@@ -0,0 +1,47 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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.
+*/
+
+import Uint64 = require( '@stdlib/number/uint64/ctor' );
+import getLowWord = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+	const a = new Uint64( 5 );
+	getLowWord( a ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided an argument that is not a 64-bit unsigned integer...
+{
+	getLowWord( 5 ); // $ExpectError
+	getLowWord( '5' ); // $ExpectError
+	getLowWord( true ); // $ExpectError
+	getLowWord( false ); // $ExpectError
+	getLowWord( [] ); // $ExpectError
+	getLowWord( {} ); // $ExpectError
+	getLowWord( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+	const a = new Uint64( 5 );
+	getLowWord(); // $ExpectError
+	getLowWord( a, a ); // $ExpectError
+}

lib/node_modules/@stdlib/number/uint64/base/get-low-word/examples/index.js

@@ -0,0 +1,38 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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';
+
+var Uint64 = require( '@stdlib/number/uint64/ctor' );
+var getLowWord = require( './../lib' );
+
+var a = new Uint64( 4294967296 );
+console.log( getLowWord( a ) );
+// => 0
+
+a = new Uint64( 0xffffffff );
+console.log( getLowWord( a ) );
+// => 4294967295
+
+a = new Uint64( 0x123400005678 );
+console.log( getLowWord( a ) );
+// => 22136
+
+a = Uint64.of( 1234, 5678 );
+console.log( getLowWord( a ) );
+// => 5678

lib/node_modules/@stdlib/number/uint64/base/get-low-word/lib/index.js

@@ -0,0 +1,42 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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';
+
+/**
+* Return a 32-bit unsigned integer corresponding to the low 32-bit word of a 64-bit unsigned integer.
+*
+* @module @stdlib/number/uint64/base/get-low-word
+*
+* @example
+* var Uint64 = require( '@stdlib/number/uint64/ctor' );
+* var getLowWord = require( '@stdlib/number/uint64/base/get-low-word' );
+*
+* var a = new Uint64( 4294967296 );
+* var w = getLowWord( a );
+* // returns 0
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;