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* @license Apache-2.0
*
* Copyright (c) 2021 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 isBigUint64Array = require( '@stdlib/assert/is-biguint64array' );
var isBigInt = require( '@stdlib/assert/is-bigint' );
var GlobalBigUint64Array = require( './biguint64array.js' );
// VARIABLES //
var MAX_SIGNED_INT64 = '9223372036854775807'; // 2**63 - 1
var MAX_SIGNED_INT64_P2 = '9223372036854775809';
// MAIN //
/**
* Tests for native `BigUint64Array` support.
*
* @returns {boolean} boolean indicating if an environment has `BigUint64Array` support
*
* @example
* var bool = hasBigUint64ArraySupport();
* // returns <boolean>
*/
function hasBigUint64ArraySupport() {
var arr;
if ( typeof GlobalBigUint64Array !== 'function' ) {
return false;
}
// Test basic support...
try {
arr = new GlobalBigUint64Array([
MAX_SIGNED_INT64,
MAX_SIGNED_INT64_P2
]);
return (
isBigUint64Array( arr ) &&
isBigInt( arr[ 0 ] ) &&
arr[ 0 ].toString() === MAX_SIGNED_INT64 &&
isBigInt( arr[ 1 ] ) &&
arr[ 1 ].toString() === MAX_SIGNED_INT64_P2
);
} catch ( err ) { // eslint-disable-line no-unused-vars
return false;
}
}
// EXPORTS //
module.exports = hasBigUint64ArraySupport;
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