ok

2023-03-10 00:25:08 +00:00
commit e491435dea
60 changed files with 4542 additions and 0 deletions
@@ -0,0 +1,35 @@
+
+use alloc::{boxed::Box, string::{String, ToString}, vec::Vec};
+use rand::{Rng, SeedableRng, rngs::SmallRng, RngCore};
+use spin::Mutex;
+use lazy_static::lazy_static;
+
+lazy_static! {
+    pub static ref RANDOM: Mutex<SmallRng> = Mutex::new(SmallRng::seed_from_u64(1));
+}
+
+
+
+
+pub struct Random;
+
+impl Random {
+    pub fn int(lower: usize, upper: usize) -> usize {
+        loop {
+            let integer: u64 = RANDOM.lock().next_u64();
+            let mut integer: String = integer.to_string();
+            integer = "0".repeat(20 - integer.len()) + &integer;
+            let integer: usize = integer[1..upper.to_string().len() + 1].parse().unwrap();
+            if integer <= upper && integer >= lower {
+                return integer;
+            } else {
+                continue;
+            }
+        }
+
+    }
+    pub fn selection<T: Clone>(ls: Vec<T>) -> T {
+        let range = Random::int(0, ls.len() - 1);
+        ls[range as usize].clone()
+    }
+}