From bd347df5d57cc18aa22bd97fb834e99de1c962e5 Mon Sep 17 00:00:00 2001
From: Edgaru089 <sjs333@outlook.com>
Date: Sun, 7 Nov 2021 01:29:07 +0800
Subject: [PATCH] driver/random: linear congruential

---
 driver/random/random.c | 15 +++++++++++++++
 driver/random/random.h | 17 +++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 driver/random/random.c
 create mode 100644 driver/random/random.h

diff --git a/driver/random/random.c b/driver/random/random.c
new file mode 100644
index 0000000..8be38c7
--- /dev/null
+++ b/driver/random/random.c
@@ -0,0 +1,15 @@
+
+#include "random.h"
+
+// glibc defaults
+static const uint32_t a = 1103515245, c = 12345, m = 2147483648;
+static uint32_t       v = 1;
+
+
+void random_Seed(uint32_t seed) {
+	v = seed;
+}
+
+uint32_t random_Rand() {
+	return v = (uint32_t)(((uint64_t)v * a + c) % m);
+}
diff --git a/driver/random/random.h b/driver/random/random.h
new file mode 100644
index 0000000..0e99339
--- /dev/null
+++ b/driver/random/random.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+void random_Seed(uint32_t seed);
+
+uint32_t random_Rand();
+
+
+#ifdef __cplusplus
+}
+#endif