1 files changed, 184 insertions, 0 deletions
diff --git a/lib/base/math-script.cpp b/lib/base/math-script.cpp
new file mode 100644
index 0000000..6cd7b0e
--- /dev/null
+++ b/lib/base/math-script.cpp
@@ -0,0 +1,184 @@
+/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
+
+#include "base/dictionary.hpp"
+#include "base/function.hpp"
+#include "base/functionwrapper.hpp"
+#include "base/scriptframe.hpp"
+#include "base/initialize.hpp"
+#include "base/namespace.hpp"
+#include <boost/math/special_functions/round.hpp>
+#include <cmath>
+
+using namespace icinga;
+
+static double MathAbs(double x)
+{
+	return std::fabs(x);
+}
+
+static double MathAcos(double x)
+{
+	return std::acos(x);
+}
+
+static double MathAsin(double x)
+{
+	return std::asin(x);
+}
+
+static double MathAtan(double x)
+{
+	return std::atan(x);
+}
+
+static double MathAtan2(double y, double x)
+{
+	return std::atan2(y, x);
+}
+
+static double MathCeil(double x)
+{
+	return std::ceil(x);
+}
+
+static double MathCos(double x)
+{
+	return std::cos(x);
+}
+
+static double MathExp(double x)
+{
+	return std::exp(x);
+}
+
+static double MathFloor(double x)
+{
+	return std::floor(x);
+}
+
+static double MathLog(double x)
+{
+	return std::log(x);
+}
+
+static Value MathMax(const std::vector<Value>& args)
+{
+	bool first = true;
+	Value result = -INFINITY;
+
+	for (const Value& arg : args) {
+		if (first || arg > result) {
+			first = false;
+			result = arg;
+		}
+	}
+
+	return result;
+}
+
+static Value MathMin(const std::vector<Value>& args)
+{
+	bool first = true;
+	Value result = INFINITY;
+
+	for (const Value& arg : args) {
+		if (first || arg < result) {
+			first = false;
+			result = arg;
+		}
+	}
+
+	return result;
+}
+
+static double MathPow(double x, double y)
+{
+	return std::pow(x, y);
+}
+
+static double MathRandom()
+{
+	return (double)std::rand() / RAND_MAX;
+}
+
+static double MathRound(double x)
+{
+	return boost::math::round(x);
+}
+
+static double MathSin(double x)
+{
+	return std::sin(x);
+}
+
+static double MathSqrt(double x)
+{
+	return std::sqrt(x);
+}
+
+static double MathTan(double x)
+{
+	return std::tan(x);
+}
+
+static bool MathIsnan(double x)
+{
+	return boost::math::isnan(x);
+}
+
+static bool MathIsinf(double x)
+{
+	return boost::math::isinf(x);
+}
+
+static double MathSign(double x)
+{
+	if (x > 0)
+		return 1;
+	else if (x < 0)
+		return -1;
+	else
+		return 0;
+}
+
+INITIALIZE_ONCE([]() {
+	Namespace::Ptr mathNS = new Namespace(true);
+
+	/* Constants */
+	mathNS->Set("E", 2.71828182845904523536);
+	mathNS->Set("LN2", 0.693147180559945309417);
+	mathNS->Set("LN10", 2.30258509299404568402);
+	mathNS->Set("LOG2E", 1.44269504088896340736);
+	mathNS->Set("LOG10E", 0.434294481903251827651);
+	mathNS->Set("PI", 3.14159265358979323846);
+	mathNS->Set("SQRT1_2", 0.707106781186547524401);
+	mathNS->Set("SQRT2", 1.41421356237309504880);
+
+	/* Methods */
+	mathNS->Set("abs", new Function("Math#abs", MathAbs, { "x" }, true));
+	mathNS->Set("acos", new Function("Math#acos", MathAcos, { "x" }, true));
+	mathNS->Set("asin", new Function("Math#asin", MathAsin, { "x" }, true));
+	mathNS->Set("atan", new Function("Math#atan", MathAtan, { "x" }, true));
+	mathNS->Set("atan2", new Function("Math#atan2", MathAtan2, { "x", "y" }, true));
+	mathNS->Set("ceil", new Function("Math#ceil", MathCeil, { "x" }, true));
+	mathNS->Set("cos", new Function("Math#cos", MathCos, { "x" }, true));
+	mathNS->Set("exp", new Function("Math#exp", MathExp, { "x" }, true));
+	mathNS->Set("floor", new Function("Math#floor", MathFloor, { "x" }, true));
+	mathNS->Set("log", new Function("Math#log", MathLog, { "x" }, true));
+	mathNS->Set("max", new Function("Math#max", MathMax, {}, true));
+	mathNS->Set("min", new Function("Math#min", MathMin, {}, true));
+	mathNS->Set("pow", new Function("Math#pow", MathPow, { "x", "y" }, true));
+	mathNS->Set("random", new Function("Math#random", MathRandom, {}, true));
+	mathNS->Set("round", new Function("Math#round", MathRound, { "x" }, true));
+	mathNS->Set("sin", new Function("Math#sin", MathSin, { "x" }, true));
+	mathNS->Set("sqrt", new Function("Math#sqrt", MathSqrt, { "x" }, true));
+	mathNS->Set("tan", new Function("Math#tan", MathTan, { "x" }, true));
+	mathNS->Set("isnan", new Function("Math#isnan", MathIsnan, { "x" }, true));
+	mathNS->Set("isinf", new Function("Math#isinf", MathIsinf, { "x" }, true));
+	mathNS->Set("sign", new Function("Math#sign", MathSign, { "x" }, true));
+
+	mathNS->Freeze();
+
+	Namespace::Ptr systemNS = ScriptGlobal::Get("System");
+	systemNS->Set("Math", mathNS, true);
+});