feat: add implementation of math/base/special/cfloornf

lib/node_modules/@stdlib/math/base/special/cfloornf/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.
+
+-->
+
+# cfloornf
+
+> Round each component of a single-precision complex floating-point number to the nearest multiple of `10^n` toward negative infinity.
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var cfloornf = require( '@stdlib/math/base/special/cfloornf' );
+```
+
+#### cfloornf( z, n )
+
+Rounds each component of a single-precision complex floating-point number to the nearest multiple of `10^n` toward negative infinity.
+
+```javascript
+var Complex64 = require( '@stdlib/complex/float32/ctor' );
+
+// Round components to the nearest ten:
+var v = cfloornf( new Complex64( -15.0, 15.0 ), 1 );
+// returns <Complex64>[ -20.0, 10.0 ]
+
+// If n = 0, `cfloornf` behaves like `cfloorf`:
+v = cfloornf( new Complex64( -3.14, 3.14 ), 0 );
+// returns <Complex64>[ -4.0, 3.0 ]
+
+// Round components to the nearest hundred:
+v = cfloornf( new Complex64( -150.0, 150.0 ), 2 );
+// returns <Complex64>[ -200.0, 100.0 ]
+
+v = cfloornf( new Complex64( NaN, NaN ), 0 );
+// returns <Complex64>[ NaN, NaN ]
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   When operating on [floating-point numbers][ieee754] in bases other than `2`, rounding to specified digits can be **inexact**. For example,
+
+    ```javascript
+    var Complex64 = require( '@stdlib/complex/float32/ctor' );
+    var f32 = require( '@stdlib/number/float64/base/to-float32' );
+
+    var x = f32( -0.2 - 0.1 );
+    // returns ~-0.30000001192092896
+
+    // Should round components to -0.3, but may differ due to float32 precision:
+    var v = cfloornf( new Complex64( x, x ), -6 );
+    ```
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var Complex64 = require( '@stdlib/complex/float32/ctor' );
+var uniform = require( '@stdlib/random/base/uniform' );
+var randint = require( '@stdlib/random/base/discrete-uniform' );
+var cfloornf = require( '@stdlib/math/base/special/cfloornf' );
+
+var z;
+var w;
+var n;
+var i;
+
+for ( i = 0; i < 100; i++ ) {
+    z = new Complex64( uniform( -50.0, 50.0 ), uniform( -50.0, 50.0 ) );
+
+    n = randint( -5.0, 0.0 );
+    w = cfloornf( z, n );
+
+    console.log( 'cfloornf(%s,%s) = %s', z.toString(), n.toString(), w.toString() );
+}
+```
+
+</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/cfloornf.h"
+```
+
+#### stdlib_base_cfloornf( z, n )
+
+Rounds each component of a single-precision complex floating-point number to the nearest multiple of `10^n` toward negative infinity.
+
+```c
+#include "stdlib/complex/float32/ctor.h"
+#include "stdlib/complex/float32/real.h"
+#include "stdlib/complex/float32/imag.h"
+
+stdlib_complex64_t z = stdlib_complex64( -3.14f, 3.14f );
+stdlib_complex64_t out = stdlib_base_cfloornf( z, -2 );
+
+float re = stdlib_complex64_real( out );
+// returns -3.15f
+
+float im = stdlib_complex64_imag( out );
+// returns 3.14f
+```
+
+The function accepts the following arguments:
+
+-   **z**: `[in] stdlib_complex64_t` input value.
+-   **n**: `[in] int32_t` integer power of 10.
+
+```c
+stdlib_complex64_t stdlib_base_cfloornf( const stdlib_complex64_t z, const int32_t n );
+```
+
+</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/cfloornf.h"
+#include "stdlib/complex/float32/ctor.h"
+#include "stdlib/complex/float32/reim.h"
+#include <stdio.h>
+
+int main( void ) {
+    const stdlib_complex64_t x[] = {
+        stdlib_complex64( 3.14f, 1.5f ),
+        stdlib_complex64( -3.14f, -1.5f ),
+        stdlib_complex64( 0.0f, 0.0f ),
+        stdlib_complex64( 0.0f/0.0f, 0.0f/0.0f )
+    };
+
+    stdlib_complex64_t v;
+    stdlib_complex64_t y;
+    float re1;
+    float im1;
+    float re2;
+    float im2;
+    int i;
+    for ( i = 0; i < 4; i++ ) {
+        v = x[ i ];
+        y = stdlib_base_cfloornf( v, -2 );
+        stdlib_complex64_reim( v, &re1, &im1 );
+        stdlib_complex64_reim( y, &re2, &im2 );
+        printf( "cfloornf(%f + %fi, -2) = %f + %fi\n", re1, im1, re2, im2 );
+    }
+}
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+* * *
+
+## See Also
+
+-   <span class="package-name">[`@stdlib/math/base/special/cfloorn`][@stdlib/math/base/special/cfloorn]</span><span class="delimiter">: </span><span class="description">round each component of a double-precision complex floating-point number to the nearest multiple of 10^n toward negative infinity.</span>
+-   <span class="package-name">[`@stdlib/math/base/special/cfloorf`][@stdlib/math/base/special/cfloorf]</span><span class="delimiter">: </span><span class="description">round each component of a single-precision complex floating-point number toward negative infinity.</span>
+-   <span class="package-name">[`@stdlib/math/base/special/floornf`][@stdlib/math/base/special/floornf]</span><span class="delimiter">: </span><span class="description">round a single-precision floating-point number to the nearest multiple of 10^n toward negative infinity.</span>
+
+</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
+
+<!-- <related-links> -->
+
+[@stdlib/math/base/special/cfloorn]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/cfloorn
+
+[@stdlib/math/base/special/cfloorf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/cfloorf
+
+[@stdlib/math/base/special/floornf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/floornf
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/math/base/special/cfloornf/benchmark/benchmark.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';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var Complex64 = require( '@stdlib/complex/float32/ctor' );
+var real = require( '@stdlib/complex/float32/real' );
+var imag = require( '@stdlib/complex/float32/imag' );
+var uniform = require( '@stdlib/random/base/uniform' );
+var pkg = require( './../package.json' ).name;
+var cfloornf = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var values;
+	var y;
+	var i;
+
+	values = [
+		new Complex64( uniform( -500.0, 500.0 ), uniform( -500.0, 500.0 ) ),
+		new Complex64( uniform( -500.0, 500.0 ), uniform( -500.0, 500.0 ) )
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		y = cfloornf( values[ i%values.length ], -2 );
+		if ( isnanf( real( y ) ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnanf( imag( y ) ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/math/base/special/cfloornf/benchmark/benchmark.native.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';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/base/uniform' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var Complex64 = require( '@stdlib/complex/float32/ctor' );
+var real = require( '@stdlib/complex/float32/real' );
+var imag = require( '@stdlib/complex/float32/imag' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var cfloornf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( cfloornf instanceof Error )
+};
+
+
+// MAIN //
+
+bench( format( '%s::native', pkg ), opts, function benchmark( b ) {
+	var values;
+	var y;
+	var i;
+
+	values = [
+		new Complex64( uniform( -500.0, 500.0 ), uniform( -500.0, 500.0 ) ),
+		new Complex64( uniform( -500.0, 500.0 ), uniform( -500.0, 500.0 ) )
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		y = cfloornf( values[ i%values.length ], -2 );
+		if ( isnanf( real( y ) ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnanf( imag( y ) ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});