Initial project import

tools/v/vlib/rand/wyrand/z_wyrand.c.v

@@ -0,0 +1,21 @@
+module wyrand
+
+fn C._wymix(u64, u64) u64
+
+// free should be called when the generator is no longer needed.
+// WyRandRNG contains no heap-allocated fields, so this is a no-op.
+@[unsafe]
+pub fn (mut rng WyRandRNG) free() {
+}
+
+// u64 returns a pseudorandom 64bit int in range `[0, 2⁶⁴)`.
+@[ignore_overflow; inline]
+pub fn (mut rng WyRandRNG) u64() u64 {
+	unsafe {
+		mut seed1 := rng.state
+		seed1 += wyp0
+		rng.state = seed1
+		return C._wymix(seed1 ^ wyp1, seed1)
+	}
+	return 0
+}