feat: add math/base/special/logf

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

@@ -0,0 +1,198 @@
+<!--
+
+@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.
+
+-->
+
+# Logarithm
+
+> Compute the base `b` [logarithm][logarithm] of a single-precision floating-point number..
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var logf = require( '@stdlib/math/base/special/logf' );
+```
+
+#### logf( x, b )
+
+Computes the base `b` logarithm of a single-precision floating-point number.
+
+```javascript
+var v = logf( 100.0, 10.0 );
+// returns 2.0
+
+v = logf( 16.0, 2.0 );
+// returns 4.0
+
+v = logf( 5.0, 1.0 );
+// returns Infinity
+```
+
+For negative `x` or `b`, the [logarithm][logarithm] is **not** defined.
+
+```javascript
+var v = logf( -4.0, 1.0 );
+// returns NaN
+
+v = logf( 2.0, -4.0 );
+// returns NaN
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var randu = require( '@stdlib/random/base/randu' );
+var roundf = require( '@stdlib/math/base/special/roundf' );
+var logf = require( '@stdlib/math/base/special/logf' );
+
+var b;
+var x;
+var i;
+
+for ( i = 0; i < 100; i++ ) {
+ x = roundf( randu() * 100.0 );
+ b = roundf( randu() * 5.0 );
+ console.log( 'logf( %d, %d ) = %d', x, b, logf( x, b ) );
+}
+```
+
+</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/logf.h"
+```
+
+#### stdlib_base_logf( x, b )
+
+Computes the base `b` logarithm of a single-precision floating-point number.
+
+```c
+float v = stdlib_base_logf( 100.0f, 10.0f );
+// returns 2.0
+```
+
+The function accepts the following arguments:
+
+- **x**: `[in] float` input value.
+- **b**: `[in] float` input value.
+
+```c
+float stdlib_base_logf( const float x, const float b );
+```
+
+</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/logf.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+int main( void ) {
+ float out;
+ float x;
+ float b;
+ int i;
+
+ for ( i = 0; i < 100; i++ ) {
+ x = ( (float)rand() / (float)RAND_MAX ) * 100.0f;
+ b = ( (float)rand() / (float)RAND_MAX ) * 5.0f;
+ out = stdlib_base_logf( x, b );
+ printf( "logf(%f, %f) = %f\n", x, b, out );
+ }
+}
+```
+
+</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">
+
+[logarithm]: https://en.wikipedia.org/wiki/Logarithm
+
+<!-- <related-links> -->
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/math/base/special/logf/benchmark/benchmark.js

@@ -0,0 +1,54 @@
+/**
+* @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 randu = require( '@stdlib/random/base/randu' );
+var roundf = require( '@stdlib/math/base/special/roundf' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var pkg = require( './../package.json' ).name;
+var logf = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+ var base;
+ var x;
+ var y;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ x = ( randu() * 1000.0 ) - 0.0;
+ base = roundf( randu() * 10.0 ) + 1.0;
+ y = logf( x, base );
+ if ( isnanf( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnanf( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});

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

@@ -0,0 +1,62 @@
+/**
+* @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 resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var randu = require( '@stdlib/random/base/randu' );
+var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var logf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+ 'skip': ( logf instanceof Error )
+};
+
+
+// MAIN //
+
+bench( pkg+'::native', opts, function benchmark( b ) {
+ var x;
+ var n;
+ var y;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ x = ( randu() * 100.0 );
+ n = ( randu() * 5.0 );
+ y = logf( x, n );
+ if ( isnanf( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnanf( y ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+});