@stdlib/number-float64-base-to-float32/lib/polyfill.js

Convert a double-precision floating-point number to the nearest single-precision floating-point number.

/**
* @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 Float32Array = require( '@stdlib/array-float32' );


// VARIABLES //

var FLOAT32_VIEW = new Float32Array( 1 );


// MAIN //

/**
* Converts a double-precision floating-point number to the nearest single-precision floating-point number.
*
* @param {number} x - double-precision floating-point number
* @returns {number} nearest single-precision floating-point number
*
* @example
* var y = float64ToFloat32( 1.337 );
* // returns 1.3370000123977661
*/
function float64ToFloat32( x ) {
	FLOAT32_VIEW[ 0 ] = x;
	return FLOAT32_VIEW[ 0 ];
}


// EXPORTS //

module.exports = float64ToFloat32;