time-to-botec/js/node_modules/@stdlib/buffer/from-string/lib/main.js

60 lines
1.6 KiB
JavaScript
Raw Normal View History

/**
* @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 isString = require( '@stdlib/assert/is-string' ).isPrimitive;
var Buffer = require( './../../ctor' );
// MAIN //
/**
* Allocates a buffer containing a provided string.
*
* @param {string} str - input string
* @param {string} [encoding="utf8"] - character encoding
* @throws {TypeError} first argument must be a string
* @throws {TypeError} second argument must be a string
* @throws {TypeError} second argument must be a valid encoding
* @returns {Buffer} new `Buffer` instance
*
* @example
* var buf = fromString( 'beep boop' );
* // returns <Buffer>
*/
function fromString( str, encoding ) {
if ( !isString( str ) ) {
throw new TypeError( 'invalid argument. First argument must be a string. Value: `' + str + '`' );
}
if ( arguments.length > 1 ) {
if ( !isString( encoding ) ) {
throw new TypeError( 'invalid argument. Second argument must be a string. Value: `' + encoding + '`' );
}
return Buffer.from( str, encoding );
}
return Buffer.from( str, 'utf8' );
}
// EXPORTS //
module.exports = fromString;