main.js (1503B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var isFloat64Array = require( './../../is-float64array' ); 24 var GlobalFloat64Array = require( './float64array.js' ); 25 26 27 // MAIN // 28 29 /** 30 * Tests for native `Float64Array` support. 31 * 32 * @returns {boolean} boolean indicating if an environment has `Float64Array` support 33 * 34 * @example 35 * var bool = hasFloat64ArraySupport(); 36 * // returns <boolean> 37 */ 38 function hasFloat64ArraySupport() { 39 var bool; 40 var arr; 41 42 if ( typeof GlobalFloat64Array !== 'function' ) { 43 return false; 44 } 45 // Test basic support... 46 try { 47 arr = new GlobalFloat64Array( [ 1.0, 3.14, -3.14, NaN ] ); 48 bool = ( 49 isFloat64Array( arr ) && 50 arr[ 0 ] === 1.0 && 51 arr[ 1 ] === 3.14 && 52 arr[ 2 ] === -3.14 && 53 arr[ 3 ] !== arr[ 3 ] 54 ); 55 } catch ( err ) { // eslint-disable-line no-unused-vars 56 bool = false; 57 } 58 return bool; 59 } 60 61 62 // EXPORTS // 63 64 module.exports = hasFloat64ArraySupport;