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* @license Apache-2.0
*
* Copyright (c) 2018 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 isFloat64Array = require( '@stdlib/assert/is-float64array' );
var GlobalFloat64Array = require( './float64array.js' );
// MAIN //
/**
* Tests for native `Float64Array` support.
*
* @returns {boolean} boolean indicating if an environment has `Float64Array` support
*
* @example
* var bool = hasFloat64ArraySupport();
* // returns <boolean>
*/
function hasFloat64ArraySupport() {
var bool;
var arr;
if ( typeof GlobalFloat64Array !== 'function' ) {
return false;
}
// Test basic support...
try {
arr = new GlobalFloat64Array( [ 1.0, 3.14, -3.14, NaN ] );
bool = (
isFloat64Array( arr ) &&
arr[ 0 ] === 1.0 &&
arr[ 1 ] === 3.14 &&
arr[ 2 ] === -3.14 &&
arr[ 3 ] !== arr[ 3 ]
);
} catch ( err ) { // eslint-disable-line no-unused-vars
bool = false;
}
return bool;
}
// EXPORTS //
module.exports = hasFloat64ArraySupport;
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