From 4862c2cf3eafdb6fa017a4e86a6fad8b4fc64171 Mon Sep 17 00:00:00 2001
From: Andrew Guschin <guschin.drew@gmail.com>
Date: Sun, 13 Nov 2022 11:50:28 +0400
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---
 lab2/src/utils.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 lab2/src/utils.rs

(limited to 'lab2/src/utils.rs')

diff --git a/lab2/src/utils.rs b/lab2/src/utils.rs
new file mode 100644
index 0000000..801a108
--- /dev/null
+++ b/lab2/src/utils.rs
@@ -0,0 +1,20 @@
+pub fn powmod(x: u64, p: u64, m: u64) -> u64 {
+    let mut res = x;
+    for _ in 1..p {
+        res = (res * x) % m;
+    }
+    return res;
+}
+
+pub fn to_bytes(x: u64) -> (u8, u8, u8, u8) {
+    return (
+        ((x >> 0) & 0xFF) as u8,
+        ((x >> 8) & 0xFF) as u8,
+        ((x >> 16) & 0xFF) as u8,
+        ((x >> 24) & 0xFF) as u8,
+    );
+}
+
+pub fn from_bytes(x1: u8, x2: u8, x3: u8, x4: u8) -> u64 {
+    return (x1 as u64) << 0 | (x2 as u64) << 8 | (x3 as u64) << 16 | (x4 as u64) << 24;
+}
-- 
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