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34 lines
666 B
34 lines
666 B
10 years ago
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// Credit: https://github.com/paulmillr/es6-shim/blob/master/es6-shim.js
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'use strict';
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var toFloat32;
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if (typeof Float32Array !== 'undefined') {
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toFloat32 = (function () {
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var float32Array = new Float32Array(1);
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return function (x) {
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float32Array[0] = x;
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return float32Array[0];
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};
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}());
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} else {
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toFloat32 = (function () {
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var pack = require('../_pack-ieee754')
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, unpack = require('../_unpack-ieee754');
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return function (x) {
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return unpack(pack(x, 8, 23), 8, 23);
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};
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}());
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}
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module.exports = function (x) {
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if (isNaN(x)) return NaN;
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x = Number(x);
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if (x === 0) return x;
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if (!isFinite(x)) return x;
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return toFloat32(x);
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};
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