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feat: add essential files
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lib/node_modules/@stdlib/number/float32/base/signbit/README.md

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-->
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# signbit
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# signbitf
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> Return a boolean indicating if the sign bit for a [single-precision floating-point number][ieee754] is on (true) or off (false).
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<!-- /.examples -->
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<!-- C interface documentation. -->
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* * *
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<section class="c">
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## C APIs
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<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
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<section class="intro">
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</section>
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<!-- /.intro -->
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<!-- C usage documentation. -->
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<section class="usage">
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### Usage
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```c
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#include "stdlib/number/float32/base/signbit.h"
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```
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#### stdlib_base_float32_signbit( x )
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Returns an integer indicating whether the sign bit for a float-precision floating-point number is on (`1`) or off (`0`).
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```c
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#include <stdint.h>
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int8_t out = stdlib_base_float32_signbit( 3.14f );
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```
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The function accepts the following arguments:
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- **x**: `[in] float` input value.
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```c
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int8_t stdlib_base_float32_signbit( const float x );
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```
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</section>
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<!-- /.usage -->
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<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
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<section class="notes">
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</section>
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<!-- /.notes -->
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<!-- C API usage examples. -->
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<section class="examples">
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### Examples
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```c
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#include "stdlib/number/float32/base/signbit.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <inttypes.h>
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int main( void ) {
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float x[] = { 3.14f, -3.14f, 0.0f, -0.0f, 4.0f, 1.0f, -1.0f, 1.0e308f, -1.0e308f };
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int8_t out;
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int i;
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for ( i = 0; i < 9; i++ ) {
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stdlib_base_float32_signbit( x[ i ], &out );
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printf( "%f => signbit: %" PRId8 "\n", x[ i ], out );
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}
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}
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```
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</section>
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<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
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<section class="related">
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# @license Apache-2.0
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#
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# Copyright (c) 2024 The Stdlib Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# A `.gyp` file for building a Node.js native add-on.
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#
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# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
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# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
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{
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# List of files to include in this file:
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'includes': [
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'./include.gypi',
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],
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# Define variables to be used throughout the configuration for all targets:
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'variables': {
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# Target name should match the add-on export name:
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'addon_target_name%': 'addon',
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# Set variables based on the host OS:
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'conditions': [
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[
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'OS=="win"',
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{
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# Define the object file suffix:
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'obj': 'obj',
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},
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{
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# Define the object file suffix:
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'obj': 'o',
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}
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], # end condition (OS=="win")
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], # end conditions
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}, # end variables
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# Define compile targets:
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'targets': [
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# Target to generate an add-on:
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{
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# The target name should match the add-on export name:
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'target_name': '<(addon_target_name)',
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# Define dependencies:
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'dependencies': [],
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# Define directories which contain relevant include headers:
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'include_dirs': [
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# Local include directory:
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'<@(include_dirs)',
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],
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# List of source files:
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'sources': [
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'<@(src_files)',
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],
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# Settings which should be applied when a target's object files are used as linker input:
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'link_settings': {
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# Define libraries:
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'libraries': [
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'<@(libraries)',
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],
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# Define library directories:
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'library_dirs': [
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'<@(library_dirs)',
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],
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},
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# C/C++ compiler flags:
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'cflags': [
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# Enable commonly used warning options:
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'-Wall',
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# Aggressive optimization:
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'-O3',
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],
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# C specific compiler flags:
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'cflags_c': [
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# Specify the C standard to which a program is expected to conform:
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'-std=c99',
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],
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# C++ specific compiler flags:
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'cflags_cpp': [
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# Specify the C++ standard to which a program is expected to conform:
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'-std=c++11',
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],
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# Linker flags:
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'ldflags': [],
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# Apply conditions based on the host OS:
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'conditions': [
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[
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'OS=="mac"',
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{
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# Linker flags:
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'ldflags': [
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'-undefined dynamic_lookup',
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'-Wl,-no-pie',
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'-Wl,-search_paths_first',
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],
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},
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], # end condition (OS=="mac")
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[
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'OS!="win"',
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{
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# C/C++ flags:
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'cflags': [
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# Generate platform-independent code:
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'-fPIC',
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],
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},
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], # end condition (OS!="win")
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], # end conditions
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}, # end target <(addon_target_name)
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# Target to copy a generated add-on to a standard location:
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{
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'target_name': 'copy_addon',
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# Declare that the output of this target is not linked:
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'type': 'none',
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# Define dependencies:
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'dependencies': [
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# Require that the add-on be generated before building this target:
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'<(addon_target_name)',
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],
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# Define a list of actions:
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'actions': [
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{
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'action_name': 'copy_addon',
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'message': 'Copying addon...',
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# Explicitly list the inputs in the command-line invocation below:
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'inputs': [],
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# Declare the expected outputs:
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'outputs': [
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'<(addon_output_dir)/<(addon_target_name).node',
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],
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# Define the command-line invocation:
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'action': [
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'cp',
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'<(PRODUCT_DIR)/<(addon_target_name).node',
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'<(addon_output_dir)/<(addon_target_name).node',
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],
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},
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], # end actions
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}, # end target copy_addon
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], # end targets
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}
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# @license Apache-2.0
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#
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# Copyright (c) 2024 The Stdlib Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# A GYP include file for building a Node.js native add-on.
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#
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# Main documentation:
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#
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# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
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# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
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{
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# Define variables to be used throughout the configuration for all targets:
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'variables': {
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# Source directory:
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'src_dir': './src',
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# Include directories:
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'include_dirs': [
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'<!@(node -e "var arr = require(\'@stdlib/utils/library-manifest\')(\'./manifest.json\',{},{\'basedir\':process.cwd(),\'paths\':\'posix\'}).include; for ( var i = 0; i < arr.length; i++ ) { console.log( arr[ i ] ); }")',
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],
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# Add-on destination directory:
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'addon_output_dir': './src',
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# Source files:
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'src_files': [
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'<(src_dir)/addon.c',
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'<!@(node -e "var arr = require(\'@stdlib/utils/library-manifest\')(\'./manifest.json\',{},{\'basedir\':process.cwd(),\'paths\':\'posix\'}).src; for ( var i = 0; i < arr.length; i++ ) { console.log( arr[ i ] ); }")',
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],
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# Library dependencies:
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'libraries': [
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'<!@(node -e "var arr = require(\'@stdlib/utils/library-manifest\')(\'./manifest.json\',{},{\'basedir\':process.cwd(),\'paths\':\'posix\'}).libraries; for ( var i = 0; i < arr.length; i++ ) { console.log( arr[ i ] ); }")',
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],
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# Library directories:
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'library_dirs': [
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'<!@(node -e "var arr = require(\'@stdlib/utils/library-manifest\')(\'./manifest.json\',{},{\'basedir\':process.cwd(),\'paths\':\'posix\'}).libpath; for ( var i = 0; i < arr.length; i++ ) { console.log( arr[ i ] ); }")',
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],
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}, # end variables
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}
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2024 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef STDLIB_NUMBER_FLOAT32_BASE_SIGNBIT_H
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#define STDLIB_NUMBER_FLOAT32_BASE_SIGNBIT_H
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#include <stdint.h>
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/*
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* If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Returns an integer indicating whether the sign bit for a float-precision floating-point number is on (`1`) or off (`0`).
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*/
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int8_t stdlib_base_float32_signbit( const float x );
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#ifdef __cplusplus
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}
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#endif
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#endif // !STDLIB_NUMBER_FLOAT32_BASE_SIGNBIT_H

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