1 files changed, 17 insertions, 0 deletions
diff --git a/src/rand.rs b/src/rand.rs
new file mode 100644
index 0000000..f9aee46
--- /dev/null
+++ b/src/rand.rs
@@ -0,0 +1,17 @@
+pub struct Gen {
+    state: i64,
+}
+
+
+pub fn new(seed: i64) -> Gen {
+    Gen{
+        state: seed,
+    }
+}
+
+impl Gen {
+    pub fn rand(&mut self, max: i32) -> i32 {
+        self.state = self.state.wrapping_mul(6364136223846793005).wrapping_add(1);
+        (self.state >> 33 & 0x7fffffff) as i32 % max
+    }
+}