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35 lines
741 B
35 lines
741 B
/* global Float32Array */ |
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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 pack = require("../_pack-ieee754") |
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, unpack = require("../_unpack-ieee754"); |
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return function (value) { |
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return unpack(pack(value, 8, 23), 8, 23); |
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}; |
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}()); |
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} else { |
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toFloat32 = (function () { |
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var float32Array = new Float32Array(1); |
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return function (num) { |
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float32Array[0] = num; |
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return float32Array[0]; |
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}; |
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}()); |
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} |
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module.exports = function (value) { |
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if (isNaN(value)) return NaN; |
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value = Number(value); |
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if (value === 0) return value; |
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if (!isFinite(value)) return value; |
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return toFloat32(value); |
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};
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