From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001
From: Vladimir Azarov <avm@intermediate-node.net>
Date: Tue, 1 Oct 2024 15:47:05 +0200
Subject: Initial version

---
 src/prng/rand.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 src/prng/rand.c

(limited to 'src/prng/rand.c')

diff --git a/src/prng/rand.c b/src/prng/rand.c
new file mode 100644
index 0000000..c000cd2
--- /dev/null
+++ b/src/prng/rand.c
@@ -0,0 +1,15 @@
+#include <stdlib.h>
+#include <stdint.h>
+
+static uint64_t seed;
+
+void srand(unsigned s)
+{
+	seed = s-1;
+}
+
+int rand(void)
+{
+	seed = 6364136223846793005ULL*seed + 1;
+	return seed>>33;
+}
-- 
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