From 26105034da4fcce7ac883c899d781f016559310d Mon Sep 17 00:00:00 2001
From: ruki <waruqi@gmail.com>
Date: Thu, 8 Nov 2018 00:38:48 +0800
Subject: switch to vuepress

---
 node_modules/es5-ext/math/log2/implement.js      |  8 ++++++++
 node_modules/es5-ext/math/log2/index.js          |  5 +++++
 node_modules/es5-ext/math/log2/is-implemented.js |  7 +++++++
 node_modules/es5-ext/math/log2/shim.js           | 14 ++++++++++++++
 4 files changed, 34 insertions(+)
 create mode 100644 node_modules/es5-ext/math/log2/implement.js
 create mode 100644 node_modules/es5-ext/math/log2/index.js
 create mode 100644 node_modules/es5-ext/math/log2/is-implemented.js
 create mode 100644 node_modules/es5-ext/math/log2/shim.js

(limited to 'node_modules/es5-ext/math/log2')

diff --git a/node_modules/es5-ext/math/log2/implement.js b/node_modules/es5-ext/math/log2/implement.js
new file mode 100644
index 00000000..f1c04e09
--- /dev/null
+++ b/node_modules/es5-ext/math/log2/implement.js
@@ -0,0 +1,8 @@
+"use strict";
+
+if (!require("./is-implemented")()) {
+	Object.defineProperty(Math, "log2", { value: require("./shim"),
+		configurable: true,
+enumerable: false,
+writable: true });
+}
diff --git a/node_modules/es5-ext/math/log2/index.js b/node_modules/es5-ext/math/log2/index.js
new file mode 100644
index 00000000..d319caec
--- /dev/null
+++ b/node_modules/es5-ext/math/log2/index.js
@@ -0,0 +1,5 @@
+"use strict";
+
+module.exports = require("./is-implemented")()
+	? Math.log2
+	: require("./shim");
diff --git a/node_modules/es5-ext/math/log2/is-implemented.js b/node_modules/es5-ext/math/log2/is-implemented.js
new file mode 100644
index 00000000..c70963f6
--- /dev/null
+++ b/node_modules/es5-ext/math/log2/is-implemented.js
@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = function () {
+	var log2 = Math.log2;
+	if (typeof log2 !== "function") return false;
+	return log2(3).toFixed(15) === "1.584962500721156";
+};
diff --git a/node_modules/es5-ext/math/log2/shim.js b/node_modules/es5-ext/math/log2/shim.js
new file mode 100644
index 00000000..51fcdae9
--- /dev/null
+++ b/node_modules/es5-ext/math/log2/shim.js
@@ -0,0 +1,14 @@
+"use strict";
+
+var log = Math.log, LOG2E = Math.LOG2E;
+
+module.exports = function (value) {
+	if (isNaN(value)) return NaN;
+	value = Number(value);
+	if (value < 0) return NaN;
+	if (value === 0) return -Infinity;
+	if (value === 1) return 0;
+	if (value === Infinity) return Infinity;
+
+	return log(value) * LOG2E;
+};
-- 
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