time-to-botec/squiggle/node_modules/@stdlib/assert/has-uint16array-support/lib/main.js
NunoSempere b6addc7f05 feat: add the node modules
Necessary in order to clearly see the squiggle hotwiring.
2022-12-03 12:44:49 +00:00

68 lines
1.7 KiB
JavaScript

/**
* @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 isUint16Array = require( './../../is-uint16array' );
var UINT16_MAX = require( '@stdlib/constants/uint16/max' );
var GlobalUint16Array = require( './uint16array.js' );
// MAIN //
/**
* Tests for native `Uint16Array` support.
*
* @returns {boolean} boolean indicating if an environment has `Uint16Array` support
*
* @example
* var bool = hasUint16ArraySupport();
* // returns <boolean>
*/
function hasUint16ArraySupport() {
var bool;
var arr;
if ( typeof GlobalUint16Array !== 'function' ) {
return false;
}
// Test basic support...
try {
arr = [ 1, 3.14, -3.14, UINT16_MAX+1, UINT16_MAX+2 ];
arr = new GlobalUint16Array( arr );
bool = (
isUint16Array( arr ) &&
arr[ 0 ] === 1 &&
arr[ 1 ] === 3 && // truncation
arr[ 2 ] === UINT16_MAX-2 && // truncation and wrap around
arr[ 3 ] === 0 && // wrap around
arr[ 4 ] === 1 // wrap around
);
} catch ( err ) { // eslint-disable-line no-unused-vars
bool = false;
}
return bool;
}
// EXPORTS //
module.exports = hasUint16ArraySupport;