major refactorings

Signed-off-by: kaguya3311 <kaguya3311@national.shitposting.agency>

oldsrc/rand/random.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <stdint.h>
+#include <stddef.h>
+
+#define GRND_NONBLOCK	0x0001
+#define GRND_RANDOM	0x0002
+#define GRND_INSECURE	0x0004
+
+void random_init(void);
+int random_read(void* buf, size_t len);
+int random_write(const void* buf, size_t len);
+int getrandom(void *buf, size_t buflen, unsigned int flags);