added main.c and Makefile

Author: RiyaChy072

lib/node_modules/@stdlib/math/base/special/cosc/src/Makefile

@@ -0,0 +1,70 @@
+#/
+# @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
+
+
+# RULES #
+
+#/
+# Removes generated files for building an add-on.
+#
+# @example
+# make clean-addon
+#/
+clean-addon:
+	$(QUIET) -rm -f *.o *.node
+
+.PHONY: clean-addon
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean: clean-addon
+
+.PHONY: clean

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

@@ -0,0 +1,66 @@
+/**
+* @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.
+*/
+
+#include "stdlib/math/base/special/cosc.h"
+#include "stdlib/math/base/special/sinpi.h"
+#include "stdlib/math/base/special/cospi.h"
+#include "stdlib/math/base/assert/is_nan.h"
+#include "stdlib/math/base/assert/is_infinite.h"
+#include "stdlib/constants/float64/pi.h"
+
+/**
+* Computes the normalized derivative of cardinal sine of a number.
+*
+* ## Method
+*
+* For \\( x \neq 0 \\), the normalized derivative of cardinal sine is calculated as
+*
+* ```tex
+*\operatorname{cosc}(x) = \frac{{\operatorname{cos}(\pi x)}-\frac{\operatorname{sin}(\pi x)}{\pi x}}{x}.
+* ```
+*
+* ## Special Cases
+*
+* ```tex
+* \begin{align*}
+* \operatorname{cosc}(0) &= 0 & \\
+* \operatorname{cosc}(\infty) &= 0 & \\
+* \operatorname{cosc}(-\infty) &= 0 & \\
+* \operatorname{cosc}(\mathrm{NaN}) &= \mathrm{NaN}
+* \end{align*}
+* ```
+*
+* @param x    input value
+* @return     derivative of cardinal sine
+*
+* @example
+* double y = stdlib_base_cosc( 0.5 );
+* // returns ~-1.273
+*/
+double stdlib_base_cosc( const double x ) {
+	if ( stdlib_base_is_nan( x ) ) {
+		return 0.0 / 0.0; // NaN
+	}
+	if ( stdlib_base_is_infinite( x ) ) {
+		return 0.0;
+	}
+	if ( x == 0.0 ) {
+		return 0.0;
+	}
+    return (stdlib_base_cospi( x ) - (stdlib_base_sinpi( x )/(STDLIB_CONSTANT_FLOAT64_PI * x))) / x;
+}