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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 C64_BYTES_PER_ELEMENT = 8; // 4 bytes per float32 x (1 real + 1 imag component)
var C128_BYTES_PER_ELEMENT = 16; // 8 bytes per float64 x (1 real + 1 imag component)
// MAIN //
/**
* Returns a boolean indicating if a value is a complex typed array.
*
* @param {*} value - value to test
* @returns {boolean} boolean indicating if a value is a complex typed array
*
* @example
* var Complex128Array = require( '@stdlib/array/complex128' );
*
* var bool = isComplexTypedArray( new Complex128Array( 10 ) );
* // returns true
*
* bool = isComplexTypedArray( [] );
* // returns false
*/
function isComplexTypedArray( value ) {
// Note: the following is not robust and that is intentional. In this case, we are seeking a lower cost way to reasonably determine whether an input value is a `Complex128Array` in order to avoid walking the prototype chain and resolving constructors, which is necessary for robust identification of cross-realm instances. For more robust validation, see `@stdlib/assert/is-complex-typed-array`.
return (
typeof value === 'object' &&
value !== null &&
(
(
value.constructor.name === 'Complex128Array' &&
value.BYTES_PER_ELEMENT === C128_BYTES_PER_ELEMENT
) ||
(
value.constructor.name === 'Complex64Array' &&
value.BYTES_PER_ELEMENT === C64_BYTES_PER_ELEMENT
)
)
);
}
// EXPORTS //
module.exports = isComplexTypedArray;
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