feat: add math/base/assert/is-integerf

PR-URL: #2762

---------

Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>
Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>

lib/node_modules/@stdlib/math/base/assert/is-integerf/README.md

@@ -0,0 +1,202 @@
+<!--
+
+@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.
+
+-->
+
+# isIntegerf
+
+> Test if a finite [single-precision floating-point number][ieee754] is an integer.
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var isIntegerf = require( '@stdlib/math/base/assert/is-integerf' );
+```
+
+#### isIntegerf( x )
+
+Tests if a finite [single-precision floating-point number][ieee754] is an integer.
+
+```javascript
+var bool = isIntegerf( 1.0 );
+// returns true
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   The function assumes a **finite** number. If provided positive or negative `infinity`, the function will return `true`, when, in fact, the result is undefined. If `x` can be `infinite`, wrap the implementation as follows:
+
+    ```javascript
+    function check( x ) {
+        return (
+            x < Infinity &&
+            x > -Infinity &&
+            isIntegerf( x )
+        );
+    }
+
+    var bool = check( Infinity );
+    // returns false
+
+    bool = check( -Infinity );
+    // returns false
+    ```
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var isIntegerf = require( '@stdlib/math/base/assert/is-integerf' );
+
+var bool = isIntegerf( -5.0 );
+// returns true
+
+bool = isIntegerf( 3.14 );
+// returns false
+
+bool = isIntegerf( NaN );
+// returns false
+```
+
+</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/assert/is_integerf.h"
+```
+
+#### stdlib_base_is_integerf( x )
+
+Tests if a finite [single-precision floating-point number][ieee754] is an integer.
+
+```c
+bool out = stdlib_base_is_integerf( 1.0 );
+// returns true
+
+out = stdlib_base_is_integerf( 3.14 );
+// returns false
+```
+
+The function accepts the following arguments:
+
+-   **x**: `[in] float` input value.
+
+```c
+bool stdlib_base_is_integerf( const float x );
+```
+
+</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/assert/is_integerf.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+int main( void ) {
+    float x;
+    bool v;
+    int i;
+
+    for ( i = 0; i < 100; i++ ) {
+        x = ( ( (float)rand() / (float)RAND_MAX ) * 100.0f ) - 50.0f;
+        v = stdlib_base_is_integerf( x );
+        printf( "x = %f, is_integerf(x) = %s\n", x, ( v ) ? "true" : "false" );
+    }
+}
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
+<!-- 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">
+
+[ieee754]: https://en.wikipedia.org/wiki/IEEE_754-1985
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/math/base/assert/is-integerf/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 isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
+var pkg = require( './../package.json' ).name;
+var isIntegerf = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg+'::true', function benchmark( b ) {
+	var values;
+	var bool;
+	var i;
+
+	values = [
+		0,
+		1,
+		2,
+		3,
+		4,
+		5,
+		6,
+		7,
+		8,
+		9,
+		1.0e38,
+		10,
+		-0,
+		-1,
+		-2,
+		-3,
+		-4,
+		-5,
+		-6,
+		-7,
+		-8,
+		-9,
+		-10,
+		-1.0e38
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		bool = isIntegerf( values[ i % values.length ] );
+		if ( typeof bool !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( bool ) && bool !== true ) {
+		b.fail( 'should return true' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( pkg+'::false', function benchmark( b ) {
+	var values;
+	var bool;
+	var i;
+
+	values = [
+		0.1,
+		1.1,
+		2.1,
+		3.1,
+		4.1,
+		5.1,
+		6.1,
+		7.1,
+		8.1,
+		9.1,
+		10.1,
+		-0.1,
+		-1.1,
+		-2.1,
+		-3.1,
+		-4.1,
+		-5.1,
+		-6.1,
+		-7.1,
+		-8.1,
+		-9.1,
+		-10.1
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		bool = isIntegerf( values[ i % values.length ] );
+		if ( typeof bool !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( bool ) && bool !== false ) {
+		b.fail( 'should return false' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});