First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/layout-base/src/util/IMath.js

@@ -0,0 +1,30 @@
+function IMath() {
+}
+
+/**
+ * This method returns the sign of the input value.
+ */
+IMath.sign = function (value) {
+  if (value > 0)
+  {
+    return 1;
+  }
+  else if (value < 0)
+  {
+    return -1;
+  }
+  else
+  {
+    return 0;
+  }
+};
+
+IMath.floor = function (value) {
+  return value < 0 ? Math.ceil(value) : Math.floor(value);
+};
+
+IMath.ceil = function (value) {
+  return value < 0 ? Math.floor(value) : Math.ceil(value);
+};
+
+module.exports = IMath;