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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/es5-ext/math/fround/shim.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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Diffstat (limited to 'node_modules/es5-ext/math/fround/shim.js')
-rw-r--r--node_modules/es5-ext/math/fround/shim.js35
1 files changed, 35 insertions, 0 deletions
diff --git a/node_modules/es5-ext/math/fround/shim.js b/node_modules/es5-ext/math/fround/shim.js
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+/* 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);
+};