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