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stdlib-bot committed Mar 9, 2024
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1 change: 1 addition & 0 deletions CONTRIBUTORS
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Expand Up @@ -34,6 +34,7 @@ Justin Dennison <[email protected]>
Karthik Prakash <[email protected]>
Khaldon <[email protected]>
Lovelin <[email protected]>
Manik Sharma <[email protected]>
Marcus Fantham <[email protected]>
Matt Cochrane <[email protected]>
Mihir Pandit <[email protected]>
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85 changes: 85 additions & 0 deletions base/special/asec/README.md
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Expand Up @@ -81,6 +81,91 @@ for ( i = 0; i < x.length; i++ ) {

<!-- /.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/asec.h"
```

#### stdlib_base_asec( x )

Computes the [inverse (arc) secant][arcsecant] of `x`.

```c
double out = stdlib_base_asec( 2.0 );
// returns ~1.0472
```

The function accepts the following arguments:

- **x**: `[in] double` input value.

```c
double stdlib_base_asec( const double 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/asec.h"
#include <stdio.h>
int main( void ) {
const double x[] = { -5.0, -3.89, -2.78, -1.67, -0.56, 0.56, 1.67, 2.78, 3.89, 5.0 };
double v;
int i;
for ( i = 0; i < 10; i++ ) {
v = stdlib_base_asec( x[ i ] );
printf( "asec(%lf) = %lf\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">
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60 changes: 60 additions & 0 deletions base/special/asec/benchmark/benchmark.native.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 resolve = require('path').resolve;
var bench = require('@stdlib/bench');
var randu = require('@stdlib/random/base/randu');
var isnan = require('./../../../../base/assert/is-nan');
var tryRequire = require('@stdlib/utils/try-require');
var pkg = require('./../package.json').name;


// VARIABLES //

var asec = tryRequire(resolve(__dirname, './../lib/native.js'));
var opts = {
'skip': (asec instanceof Error)
};


// MAIN //

bench(pkg + '::native', opts, function benchmark(b) {
var y;
var i;
var x;

b.tic();
for ( i = 0; i < b.iterations; i++ ) {
x = ( randu()*1000.0 ) + 1.0;
y = asec( x );
if ( isnan( y ) ) {
b.fail( 'should not return NaN' );
}
}
b.toc();
if ( isnan( y ) ) {
b.fail( 'should not return NaN' );
}
b.pass( 'benchmark finished' );
b.end();
});
126 changes: 126 additions & 0 deletions base/special/asec/benchmark/c/Makefile
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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.
#/

# VARIABLES #

ifndef VERBOSE
QUIET := @
else
QUIET :=
endif

# Determine the OS ([1][1], [2][2]).
#
# [1]: https://en.wikipedia.org/wiki/Uname#Examples
# [2]: http://stackoverflow.com/a/27776822/2225624
OS ?= $(shell uname)
ifneq (, $(findstring MINGW,$(OS)))
OS := WINNT
else
ifneq (, $(findstring MSYS,$(OS)))
OS := WINNT
else
ifneq (, $(findstring CYGWIN,$(OS)))
OS := WINNT
else
ifneq (, $(findstring Windows_NT,$(OS)))
OS := WINNT
endif
endif
endif
endif

# Define the program used for compiling C source files:
ifdef C_COMPILER
CC := $(C_COMPILER)
else
CC := gcc
endif

# Define the command-line options when compiling C files:
CFLAGS ?= \
-std=c99 \
-O3 \
-Wall \
-pedantic

# Determine whether to generate position independent code ([1][1], [2][2]).
#
# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
ifeq ($(OS), WINNT)
fPIC ?=
else
fPIC ?= -fPIC
endif

# List of C targets:
c_targets := benchmark.out


# RULES #

#/
# Compiles C source files.
#
# @param {string} [C_COMPILER] - C compiler
# @param {string} [CFLAGS] - C compiler flags
# @param {(string|void)} [fPIC] - compiler flag indicating whether to generate position independent code
#
# @example
# make
#
# @example
# make all
#/
all: $(c_targets)

.PHONY: all

#/
# Compiles C source files.
#
# @private
# @param {string} CC - C compiler
# @param {string} CFLAGS - C compiler flags
# @param {(string|void)} fPIC - compiler flag indicating whether to generate position independent code
#/
$(c_targets): %.out: %.c
$(QUIET) $(CC) $(CFLAGS) $(fPIC) -o $@ $< -lm

#/
# Runs compiled benchmarks.
#
# @example
# make run
#/
run: $(c_targets)
$(QUIET) ./$<

.PHONY: run

#/
# Removes generated files.
#
# @example
# make clean
#/
clean:
$(QUIET) -rm -f *.o *.out

.PHONY: clean
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