feat: add C APIs for half-precision floating-point number utilities

lib/node_modules/@stdlib/number/float16/README.md

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+<!--
+
+@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.
+
+-->
+
+# Float16
+
+> Utilities for half-precision floating-point numbers.
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var ns = require( '@stdlib/number/float16' );
+```
+
+#### ns
+
+Utilities for half-precision floating-point numbers.
+
+```javascript
+var o = ns;
+// returns {...}
+```
+
+The namespace contains the following:
+
+<!-- <toc pattern="*"> -->
+
+<div class="namespace-toc">
+
+-   <span class="signature">[`base`][@stdlib/number/float16/base]</span><span class="delimiter">: </span><span class="description">base utilities for half-precision floating-point numbers.</span>
+-   <span class="signature">[`reviver( key, value )`][@stdlib/number/float16/reviver]</span><span class="delimiter">: </span><span class="description">revive a JSON-serialized number.</span>
+-   <span class="signature">[`toJSON( x )`][@stdlib/number/float16/to-json]</span><span class="delimiter">: </span><span class="description">return a JSON representation of a number.</span>
+
+</div>
+
+<!-- </toc> -->
+
+</section>
+
+<!-- /.usage -->
+
+<section class="examples">
+
+## Examples
+
+<!-- TODO: better examples -->
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var objectKeys = require( '@stdlib/utils/keys' );
+var ns = require( '@stdlib/number/float16' );
+
+console.log( objectKeys( ns ) );
+```
+
+</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">
+
+<!-- <toc-links> -->
+
+[@stdlib/number/float16/base]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/number/float16/base
+
+[@stdlib/number/float16/reviver]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/number/float16/reviver
+
+[@stdlib/number/float16/to-json]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/number/float16/to-json
+
+<!-- </toc-links> -->
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/number/float16/docs/types/index.d.ts

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+/*
+* @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
+
+/* eslint-disable max-lines */
+
+import base = require( '@stdlib/number/float16/base' );
+import reviver = require( '@stdlib/number/float16/reviver' );
+import toJSON = require( '@stdlib/number/float16/to-json' );
+
+/**
+* Interface describing the `float16` namespace.
+*/
+interface Namespace {
+	/**
+	* Base utilities for half-precision floating-point numbers.
+	*/
+	base: typeof base;
+
+	/**
+	* Revives a JSON-serialized number.
+	*
+	* @param key - key
+	* @param value - value
+	* @returns value
+	*
+	* @example
+	* var parseJSON = require( '@stdlib/utils/parse-json' );
+	*
+	* var str = '{"type":"float16","value":"NaN"}';
+	*
+	* var out = parseJSON( str, ns.reviver );
+	* // returns NaN
+	*/
+	reviver: typeof reviver;
+
+	/**
+	* Returns a JSON representation of a number.
+	*
+	* @param x - input value
+	* @returns JSON representation
+	*
+	* @example
+	* var str = JSON.stringify( ns.toJSON( NaN ) );
+	* // returns '{"type":"float16","value":"NaN"}'
+	*/
+	toJSON: typeof toJSON;
+}
+
+/**
+* Utilities for half-precision floating-point numbers.
+*/
+declare var ns: Namespace;
+
+
+// EXPORTS //
+
+export = ns;

lib/node_modules/@stdlib/number/float16/docs/types/test.ts

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+/*
+* @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.
+*/
+
+/* eslint-disable @typescript-eslint/no-unused-expressions */
+
+import ns = require( './index' );
+
+
+// TESTS //
+
+// The exported value is the expected interface...
+{
+	ns; // $ExpectType Namespace
+}

lib/node_modules/@stdlib/number/float16/examples/index.js

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+/**
+* @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 objectKeys = require( '@stdlib/utils/keys' );
+var ns = require( './../lib' );
+
+console.log( objectKeys( ns ) );

lib/node_modules/@stdlib/number/float16/include/stdlib/number/float16.h

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+/**
+* @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.
+*/
+
+#ifndef STDLIB_NUMBER_FLOAT16_H
+#define STDLIB_NUMBER_FLOAT16_H
+
+// Note: keep in alphabetical order...
+#include "stdlib/number/float16/ctor.h"
+#include "stdlib/number/float16/base/exponent.h"
+#include "stdlib/number/float16/base/from_word.h"
+#include "stdlib/number/float16/base/signbit.h"
+#include "stdlib/number/float16/base/significand.h"
+#include "stdlib/number/float16/base/to_float32.h"
+#include "stdlib/number/float16/base/to_float64.h"
+#include "stdlib/number/float16/base/to_word.h"
+
+#endif // !STDLIB_NUMBER_FLOAT16_H

lib/node_modules/@stdlib/number/float16/lib/index.js

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+/**
+* @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';
+
+/*
+* When adding modules to the namespace, ensure that they are added in alphabetical order according to module name.
+*/
+
+// MODULES //
+
+var setReadOnly = require( '@stdlib/utils/define-read-only-property' );
+
+
+// MAIN //
+
+/**
+* Top-level namespace.
+*
+* @namespace ns
+*/
+var ns = {};
+
+/**
+* @name base
+* @memberof ns
+* @readonly
+* @type {Namespace}
+* @see {@link module:@stdlib/number/float16/base}
+*/
+setReadOnly( ns, 'base', require( '@stdlib/number/float16/base' ) );
+
+/**
+* @name ctor
+* @memberof ns
+* @readonly
+* @type {Namespace}
+* @see {@link module:@stdlib/number/float16/ctor}
+*/
+setReadOnly( ns, 'ctor', require( '@stdlib/number/float16/ctor' ) );
+
+/**
+* @name reviver
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/number/float16/reviver}
+*/
+setReadOnly( ns, 'reviver', require( '@stdlib/number/float16/reviver' ) );
+
+/**
+* @name toJSON
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/number/float16/to-json}
+*/
+setReadOnly( ns, 'toJSON', require( '@stdlib/number/float16/to-json' ) );
+
+
+// EXPORTS //
+
+module.exports = ns;

lib/node_modules/@stdlib/number/float16/manifest.json

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+{
+  "options": {},
+  "fields": [
+    {
+      "field": "src",
+      "resolve": true,
+      "relative": true
+    },
+    {
+      "field": "include",
+      "resolve": true,
+      "relative": true
+    },
+    {
+      "field": "libraries",
+      "resolve": false,
+      "relative": false
+    },
+    {
+      "field": "libpath",
+      "resolve": true,
+      "relative": false
+    }
+  ],
+  "confs": [
+    {
+      "src": [],
+      "include": [
+        "./include"
+      ],
+      "libraries": [],
+      "libpath": [],
+      "dependencies": [
+        "@stdlib/number/float16/ctor",
+        "@stdlib/number/float16/base/exponent",
+        "@stdlib/number/float16/base/from-word",
+        "@stdlib/number/float16/base/signbit",
+        "@stdlib/number/float16/base/significand",
+        "@stdlib/number/float16/base/to-float32",
+        "@stdlib/number/float16/base/to-float64",
+        "@stdlib/number/float16/base/to-word"
+      ]
+    }
+  ]
+}