/**
* @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 BYTES_PER_ELEMENT = require( './bytes_per_element.json' );


// MAIN //

/**
* Returns the number of bytes per element provided an underlying array data type.
*
* @param {string} dtype - data type
* @returns {(NonNegativeInteger|null)} number of bytes per element
*
* @example
* var nbytes = bytesPerElement( 'float64' );
* // returns 8
*
* nbytes = bytesPerElement( 'generic' );
* // returns null
*/
function bytesPerElement( dtype ) {
	return BYTES_PER_ELEMENT[ dtype ] || null;
}


// EXPORTS //

module.exports = bytesPerElement;