init

tools/gen.d

@@ -0,0 +1,42 @@
+#!/usr/bin/rdmd
+
+import std.stdio : write, writef, writeln;
+import std.random : Random, unpredictableSeed, uniform;
+
+void main()
+{
+	enum N = 256;
+	ulong[N] gear;
+
+	auto rng = Random(unpredictableSeed);
+
+	bool[ulong] seen;
+	ulong[] vals;
+	vals.reserve(N);
+
+	while (vals.length < N)
+	{
+		const v = uniform!ulong(rng);
+		if (v in seen)
+			continue;
+		seen[v] = true;
+		vals ~= v;
+	}
+
+	gear[] = vals[0 .. N];
+
+	writeln("immutable ulong[256] gear = [");
+	foreach (i, v; gear)
+	{
+		if (i % 4 == 0)
+			write("\t");
+		writef("0x%016x", v);
+		if (i != N - 1)
+			write(",");
+		if ((i + 1) % 4 == 0 || i == N - 1)
+			writeln();
+		else
+			write(" ");
+	}
+	writeln("];");
+}