feat: initial commit for feedback

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/heaviside/include/stdlib/math/base/special/heaviside.h

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 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.
+*/
+
+#ifndef STDLIB_MATH_BASE_SPECIAL_HEAVISIDE_H
+#define STDLIB_MATH_BASE_SPECIAL_HEAVISIDE_H
+
+/*
+* If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
+*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Enumeration of function continuity:
+typedef enum STDLIB_MATH_CONTINUITY {
+	// Half-maximum:
+	STDLIB_MATH_HALF_MAXIMUM = 0,
+
+	// Left-continuous:
+	STDLIB_MATH_LEFT_CONTINUOUS = 1,
+
+	// Right-continuous:
+	STDLIB_MATH_RIGHT_CONTINUOUS = 2,
+
+	// Discontinuous:
+	STDLIB_MATH_DISCONTINUOUS = 3
+} STDLIB_MATH_CONTINUITY;
+
+/**
+* Evaluates the Heaviside function.
+*/
+double stdlib_base_heaviside( const double x, const STDLIB_MATH_CONTINUITY continuity );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // !STDLIB_MATH_BASE_SPECIAL_HEAVISIDE_H

lib/node_modules/@stdlib/math/base/special/heaviside/lib/native.js

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 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 addon = require( './../src/addon.node' );
+
+
+// MAIN //
+
+/**
+* Evaluates the Heaviside function.
+*
+* @private
+* @param {number} x - input value
+* @param {string} [continuity] - continuity option
+* @returns {number} function value
+*
+* @example
+* var v = heaviside( 0.0, 0 );
+* // returns 0.5
+*
+* @example
+* var v = heaviside( 0.0, 1 );
+* // returns 0.0
+*
+* @example
+* var v = heaviside( 0.0, 2 );
+* // returns 1.0
+*
+* @example
+* var v = heaviside( 0.0, 3 );
+* // returns NaN
+*
+* @example
+* var v = heaviside( NaN, 2 );
+* // returns NaN
+*/
+function heaviside( x, continuity ) {
+	return addon( x, continuity );
+}
+
+
+// EXPORTS //
+
+module.exports = heaviside;

lib/node_modules/@stdlib/math/base/special/heaviside/src/addon.c

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 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.
+*/
+
+#include "stdlib/math/base/special/heaviside.h"
+#include "stdlib/napi/export.h"
+#include "stdlib/napi/argv.h"
+#include "stdlib/napi/argv_int32.h"
+#include "stdlib/napi/argv_double.h"
+#include "stdlib/napi/create_double.h"
+#include <node_api.h>
+
+/**
+* Receives JavaScript callback invocation data.
+*
+* @param env    environment under which the function is invoked
+* @param info   callback data
+* @return       Node-API value
+*/
+static napi_value addon( napi_env env, napi_callback_info info ) {
+	STDLIB_NAPI_ARGV( env, info, argv, argc, 2 );
+	STDLIB_NAPI_ARGV_DOUBLE( env, x, argv, 0 );
+	STDLIB_NAPI_ARGV_INT32( env, continuity, argv, 1 );
+	STDLIB_NAPI_CREATE_DOUBLE( env, stdlib_base_heaviside( x, (STDLIB_MATH_CONTINUITY)continuity ), out );
+	return out;
+}
+
+STDLIB_NAPI_MODULE_EXPORT_FCN( addon )

lib/node_modules/@stdlib/math/base/special/heaviside/src/main.c

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+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 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.
+*/
+
+#include "stdlib/math/base/special/heaviside.h"
+#include "stdlib/math/base/assert/is_nan.h"
+
+/**
+* Evaluates the Heaviside function.
+*
+* @param x             input value
+* @param continuity    continuity option
+* @return              function value
+*
+* @example
+* double y = stdlib_base_heaviside( 0.0, STDLIB_MATH_HALF_MAXIMUM );
+* // returns 0.5
+*/
+double stdlib_base_heaviside( const double x, const STDLIB_MATH_CONTINUITY continuity ) {
+	if ( stdlib_base_is_nan( x ) ) {
+		return 0.0 / 0.0; // NaN
+	}
+	if ( x > 0.0 ) {
+		return 1.0;
+	}
+	// Handle `+-0`...
+	if ( x == 0.0 ) {
+		switch ( continuity ) {
+			case STDLIB_MATH_HALF_MAXIMUM:
+				return 0.5;
+			case STDLIB_MATH_LEFT_CONTINUOUS:
+				return 0.0;
+			case STDLIB_MATH_RIGHT_CONTINUOUS:
+				return 1.0;
+			case STDLIB_MATH_DISCONTINUOUS:
+				return 0.0 / 0.0; // NaN
+			default:
+				return 0.0 / 0.0; // NaN
+		}
+	}
+	return 0.0;
+}