feat: add math/base/special/acschf

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

@@ -0,0 +1,214 @@
+<!--
+
+@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.
+
+-->
+
+# acschf
+
+> Computes the [hyperbolic arccosecant][inverse-hyperbolic-functions] of a single-precision floating-point number.
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var acschf = require( '@stdlib/math/base/special/acschf' );
+```
+
+#### acschf( x )
+
+Computes the [hyperbolic arccosecant][inverse-hyperbolic-functions] of `x`.
+
+```javascript
+var v = acschf( 0.0 );
+// returns Infinity
+
+v = acschf( -0.0 );
+// returns -Infinity
+
+v = acschf( 1.0 );
+// returns ~0.881
+
+v = acschf( -1.0 );
+// returns ~-0.881
+
+v = acschf( NaN );
+// returns NaN
+
+v = acschf( -Infinity );
+// returns -0.0
+
+v = acschf( Infinity );
+// returns 0.0
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var acschf = require( '@stdlib/math/base/special/acschf' );
+
+var x = uniform( 100, 1.0, 5.0, {
+    'dtype': 'float32'
+});
+
+logEachMap( 'acschf(%0.4f) = %0.4f', x, acschf );
+```
+
+</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/acschf.h"
+```
+
+#### stdlib_base_acschf( x )
+
+> Compute the [hyperbolic arccosecant][inverse-hyperbolic-functions] of a single-precision floating-point number.
+
+```c
+float out = stdlib_base_acschf( 1.0 );
+// returns ~0.881
+```
+
+The function accepts the following arguments:
+
+-   **x**: `[in] float` input value.
+
+```c
+float stdlib_base_acschf( 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/special/acschf.h"
+#include <stdio.h>
+
+int main( void ) {
+    const float x[] = { -5.0f, -3.89f, -2.78f, -1.67f, -0.55f, 0.55f, 1.67f, 2.78f, 3.89f, 5.0f };
+
+    float v;
+    int i;
+    for ( i = 0; i < 10; i++ ) {
+        v = stdlib_base_acschf( x[ i ] );
+        printf( "acsch(%f) = %f\n", x[ i ], v );
+    }
+}
+```
+
+</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/acothf`][@stdlib/math/base/special/acothf]</span><span class="delimiter">: </span><span class="description">compute the inverse hyperbolic cotangent of a single-precision floating-point number.</span>
+-   <span class="package-name">[`@stdlib/math/base/special/acscf`][@stdlib/math/base/special/acscf]</span><span class="delimiter">: </span><span class="description">compute the arccosecant of a single-precision floating-point number.</span>
+-   <span class="package-name">[`@stdlib/math/base/special/asechf`][@stdlib/math/base/special/asechf]</span><span class="delimiter">: </span><span class="description">compute the hyperbolic arcsecant of a single-precision floating-point number.</span>
+-   <span class="package-name">[`@stdlib/math/base/special/asinhf`][@stdlib/math/base/special/asinhf]</span><span class="delimiter">: </span><span class="description">compute the hyperbolic arcsine of a single-precision floating-point number.</span>
+-   <span class="package-name">[`@stdlib/math/base/special/cscf`][@stdlib/math/base/special/cscf]</span><span class="delimiter">: </span><span class="description">compute the cosecant of a single-precision floating-point number.</span>
+-   <span class="package-name">[`@stdlib/math/base/special/cschf`][@stdlib/math/base/special/cschf]</span><span class="delimiter">: </span><span class="description">compute the hyperbolic cosecant of a single-precision floating-point number.</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">
+
+[inverse-hyperbolic-functions]: https://en.wikipedia.org/wiki/Inverse_hyperbolic_functions
+
+<!-- <related-links> -->
+
+[@stdlib/math/base/special/acothf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/acothf
+
+[@stdlib/math/base/special/acscf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/acscf
+
+[@stdlib/math/base/special/asechf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/asechf
+
+[@stdlib/math/base/special/asinhf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/asinhf
+
+[@stdlib/math/base/special/cscf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/cscf
+
+[@stdlib/math/base/special/cschf]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/math/base/special/cschf
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/math/base/special/acschf/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 f32 = require( '@stdlib/number/float64/base/to-float32' );
+var pkg = require( './../package.json' ).name;
+var acschf = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var x;
+	var i;
+
+	x = f32( 1.234567 );
+	i = 0;
+
+	b.tic();
+	while ( i < b.iterations ) {
+		x = acschf( x );
+		i += 1;
+	}
+	b.toc();
+
+	if ( x !== x ) {
+		b.fail( 'unexpected NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

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

@@ -0,0 +1,59 @@
+/**
+* @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 tryRequire = require( '@stdlib/utils/try-require' );
+var f32 = require( '@stdlib/number/float64/base/to-float32' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var acschf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( acschf instanceof Error )
+};
+
+
+// MAIN //
+
+bench( pkg+'::native', opts, function benchmark( b ) {
+	var x;
+	var i;
+
+	x = f32( 1.234567 );
+	i = 0;
+
+	b.tic();
+	while ( i < b.iterations ) {
+		x = acschf( x );
+		i += 1;
+	}
+	b.toc();
+
+	if ( x !== x ) {
+		b.fail( 'unexpected NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});