1 files changed, 29 insertions, 0 deletions
diff --git a/include/smrandom.hpp b/include/smrandom.hpp
new file mode 100644
index 0000000..ed560e0
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+++ b/include/smrandom.hpp
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+// -*- C++ -*-
+/*
+ * Simple MultimEdia LiTerator(SMELT)
+ * by Chris Xiong 2015
+ * Random engine header & implementation
+ *
+ * WARNING: This library is in development and interfaces would be very
+ * unstable.
+ *
+ */
+class smRandomEngine
+{
+private:
+	unsigned int cseed;
+public:
+	void setSeed(unsigned int seed){cseed=seed;}
+	int nextInt(int min,int max)
+	{
+		if (min>max){int t=min;min=max;max=t;}
+		cseed*=214013;cseed+=2531011;
+		return min+(cseed^cseed>>15)%(max-min+1);
+	}
+	double nextDouble(double min,double max)
+	{
+		if (min>max){double t=min;min=max;max=t;}
+		cseed*=214013;cseed+=2531011;
+		return min+(cseed>>16)*(1.0f/65535.0f)*(max-min);
+	}
+};