feat: add strided for csignumf function

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---

Author: Deepak91168

lib/node_modules/@stdlib/math/base/special/csignumf/lib/strided.js

@@ -0,0 +1,71 @@
+/**
+* @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 Complex64 = require( '@stdlib/complex/float32/ctor' );
+var real = require( '@stdlib/complex/float32/real' );
+var imag = require( '@stdlib/complex/float32/imag' );
+var csignumf = require( './main.js' );
+
+
+// MAIN //
+
+/**
+* Computes the signum of a single-precision complex number stored in a real-valued strided array view and assigns the result to a provided strided output array.
+*
+* @param {Float32Array} z - complex number view (interleaved real and imaginary)
+* @param {integer} strideZ - stride length for `z`
+* @param {NonNegativeInteger} offsetZ - starting index for `z`
+* @param {Float32Array} out - output array
+* @param {integer} strideOut - stride length for `out`
+* @param {NonNegativeInteger} offsetOut - starting index for `out`
+* @returns {Float32Array} output array
+*
+* @example
+* var Float32Array = require( '@stdlib/array/float32' );
+* var strided = require( '@stdlib/math/base/special/csignumf' ).strided;
+*
+* var z = new Float32Array( [ 3.0, 4.0 ] );
+* var out = new Float32Array( 2 );
+*
+* strided( z, 1, 0, out, 1, 0 );
+* console.log( out );
+* // => <Float32Array>[ ~0.6, ~0.8 ]
+*/
+function strided( z, strideZ, offsetZ, out, strideOut, offsetOut ) {
+	var result;
+	var re;
+	var im;
+
+	re = z[ offsetZ ];
+	im = z[ offsetZ + strideZ ];
+	result = csignumf( new Complex64( re, im ) );
+
+	out[ offsetOut ] = real( result );
+	out[ offsetOut + strideOut ] = imag( result );
+
+	return out;
+}
+
+
+// EXPORTS //
+
+module.exports = strided;