[Keymap] Lily58 : HELL0 NAVI. Interface (#15469)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Joel Challis <git@zvecr.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/keyboards/lily58/keymaps/druotoni/fast_random.c b/keyboards/lily58/keymaps/druotoni/fast_random.c
new file mode 100644
index 0000000000..3028b57ac6
--- /dev/null
+++ b/keyboards/lily58/keymaps/druotoni/fast_random.c
@@ -0,0 +1,17 @@
+// Copyright 2021 Nicolas Druoton (druotoni)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "fast_random.h"
+
+// seed for random
+static unsigned long g_seed = 0;
+
+int fastrand(void) {
+    // todo : try with random16();
+    g_seed = (214013 * g_seed + 2531011);
+    return (g_seed >> 16) & 0x7FFF;
+}
+
+unsigned long fastrand_long(void) {
+    g_seed = (214013 * g_seed + 2531011);
+    return g_seed;
+}