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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 isBuffer = require( '@stdlib/assert/is-buffer' );
var GlobalBuffer = require( './buffer.js' );
// MAIN //
/**
* Tests for native `Buffer` support.
*
* @returns {boolean} boolean indicating if an environment has `Buffer` support
*
* @example
* var bool = hasNodeBufferSupport();
* // returns <boolean>
*/
function hasNodeBufferSupport() {
var bool;
var b;
if ( typeof GlobalBuffer !== 'function' ) {
return false;
}
// Test basic support...
try {
if ( typeof GlobalBuffer.from === 'function' ) {
b = GlobalBuffer.from( [ 1, 2, 3, 4 ] );
} else {
b = new GlobalBuffer( [ 1, 2, 3, 4 ] ); // Note: this is deprecated behavior starting in Node v6 (see https://nodejs.org/api/buffer.html#buffer_new_buffer_array)
}
bool = (
isBuffer( b ) &&
b[ 0 ] === 1 &&
b[ 1 ] === 2 &&
b[ 2 ] === 3 &&
b[ 3 ] === 4
);
} catch ( err ) { // eslint-disable-line no-unused-vars
bool = false;
}
return bool;
}
// EXPORTS //
module.exports = hasNodeBufferSupport;
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