4 files changed, 37 insertions, 0 deletions
diff --git a/node_modules/es5-ext/math/log1p/implement.js b/node_modules/es5-ext/math/log1p/implement.js
new file mode 100644
index 000000000..36fcee619
--- /dev/null
+++ b/node_modules/es5-ext/math/log1p/implement.js
@@ -0,0 +1,8 @@
+"use strict";
+
+if (!require("./is-implemented")()) {
+	Object.defineProperty(Math, "log1p", { value: require("./shim"),
+		configurable: true,
+enumerable: false,
+writable: true });
+}
diff --git a/node_modules/es5-ext/math/log1p/index.js b/node_modules/es5-ext/math/log1p/index.js
new file mode 100644
index 000000000..41c67364f
--- /dev/null
+++ b/node_modules/es5-ext/math/log1p/index.js
@@ -0,0 +1,5 @@
+"use strict";
+
+module.exports = require("./is-implemented")()
+	? Math.log1p
+	: require("./shim");
diff --git a/node_modules/es5-ext/math/log1p/is-implemented.js b/node_modules/es5-ext/math/log1p/is-implemented.js
new file mode 100644
index 000000000..7626ab47e
--- /dev/null
+++ b/node_modules/es5-ext/math/log1p/is-implemented.js
@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = function () {
+	var log1p = Math.log1p;
+	if (typeof log1p !== "function") return false;
+	return log1p(1) === 0.6931471805599453;
+};
diff --git a/node_modules/es5-ext/math/log1p/shim.js b/node_modules/es5-ext/math/log1p/shim.js
new file mode 100644
index 000000000..7c6f22734
--- /dev/null
+++ b/node_modules/es5-ext/math/log1p/shim.js
@@ -0,0 +1,17 @@
+// Thanks: https://github.com/monolithed/ECMAScript-6/blob/master/ES6.js
+
+"use strict";
+
+var log = Math.log;
+
+module.exports = function (value) {
+	if (isNaN(value)) return NaN;
+	value = Number(value);
+	if (value < -1) return NaN;
+	if (value === -1) return -Infinity;
+	if (value === 0) return value;
+	if (value === Infinity) return Infinity;
+
+	if (value > -1.0e-8 && value < 1.0e-8) return value - value * value / 2;
+	return log(1 + value);
+};