Add kiwi lib

thirdparty/include/kiwi/util.h

@@ -0,0 +1,24 @@
+/*-----------------------------------------------------------------------------
+| Copyright (c) 2013-2017, Nucleic Development Team.
+|
+| Distributed under the terms of the Modified BSD License.
+|
+| The full license is in the file LICENSE, distributed with this software.
+|----------------------------------------------------------------------------*/
+#pragma once
+
+namespace kiwi
+{
+
+namespace impl
+{
+
+inline bool nearZero(double value)
+{
+    const double eps = 1.0e-8;
+    return value < 0.0 ? -value < eps : value < eps;
+}
+
+} // namespace impl
+
+} // namespace kiwi