rename

Sources/ECGSynKit/SplitMix64.swift

@@ -0,0 +1,21 @@
+
+struct SplitMix64 : RandomNumberGenerator {
+    public typealias State = UInt64
+    public private(set) var state: State
+
+    init(state: UInt64) {
+        self.state = state
+    }
+
+    public mutating func next() -> UInt64 {
+        state &+= 0x9E3779B97F4A7C15
+        var z = state
+        z = (z ^ (z >> 30)) &* 0xBF58476D1CE4E5B9
+        z = (z ^ (z >> 27)) &* 0x94D049BB133111EB
+        return z ^ (z >> 31)
+    }
+
+    public mutating func nextDouble() -> Double {
+        Double(next() >> 11) * 0x1.0p-53
+    }
+}