Remove lazy_static from dependencies (#847)

* Remove lazy_static from dependencies * Apply auto rustfmt
TheAlgorithms · Dec 10, 2024 · 7903120 · 7903120
1 parent f66f836
commit 7903120
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diff --git a/Cargo.toml b/Cargo.toml
@@ -5,7 +5,6 @@ version = "0.1.0"
 authors = ["Anshul Malik <malikanshul29@gmail.com>"]
 
 [dependencies]
-lazy_static = "1.4.0"
 num-bigint = { version = "0.4", optional = true }
 num-traits = { version = "0.2", optional = true }
 rand = "0.8"

diff --git a/src/ciphers/diffie_hellman.rs b/src/ciphers/diffie_hellman.rs
@@ -2,57 +2,57 @@
 // RFC 3526 - More Modular Exponential (MODP) Diffie-Hellman groups for
 // Internet Key Exchange (IKE) https://tools.ietf.org/html/rfc3526
 
-use lazy_static;
 use num_bigint::BigUint;
 use num_traits::{Num, Zero};
 use std::{
     collections::HashMap,
+    sync::LazyLock,
     time::{SystemTime, UNIX_EPOCH},
 };
 
-// Using lazy static to initialize statics that require code to be executed at runtime.
-lazy_static! {
-    // A map of predefined prime numbers for different bit lengths, as specified in RFC 3526
-    static ref PRIMES: HashMap<u8, BigUint> = {
-        let mut m:HashMap<u8, BigUint> = HashMap::new();
-        m.insert(
-            // 1536-bit
-            5,
-            BigUint::parse_bytes(
-                b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1\
-                    29024E088A67CC74020BBEA63B139B22514A08798E3404DD\
-                    EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245\
-                    E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED\
-                    EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D\
-                    C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F\
-                    83655D23DCA3AD961C62F356208552BB9ED529077096966D\
-                    670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF",
-                16
-            ).unwrap()
-        );
-        m.insert(
-            // 2048-bit
-            14,
-            BigUint::parse_bytes(
-                b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1\
+// A map of predefined prime numbers for different bit lengths, as specified in RFC 3526
+static PRIMES: LazyLock<HashMap<u8, BigUint>> = LazyLock::new(|| {
+    let mut m: HashMap<u8, BigUint> = HashMap::new();
+    m.insert(
+        // 1536-bit
+        5,
+        BigUint::parse_bytes(
+            b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1\
                 29024E088A67CC74020BBEA63B139B22514A08798E3404DD\
                 EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245\
                 E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED\
                 EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D\
                 C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F\
                 83655D23DCA3AD961C62F356208552BB9ED529077096966D\
-                670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B\
-                E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9\
-                DE2BCBF6955817183995497CEA956AE515D2261898FA0510\
-                15728E5A8AACAA68FFFFFFFFFFFFFFFF",
-                16
-            ).unwrap()
-        );
+                670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF",
+            16,
+        )
+        .unwrap(),
+    );
+    m.insert(
+        // 2048-bit
+        14,
+        BigUint::parse_bytes(
+            b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1\
+            29024E088A67CC74020BBEA63B139B22514A08798E3404DD\
+            EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245\
+            E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED\
+            EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D\
+            C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F\
+            83655D23DCA3AD961C62F356208552BB9ED529077096966D\
+            670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B\
+            E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9\
+            DE2BCBF6955817183995497CEA956AE515D2261898FA0510\
+            15728E5A8AACAA68FFFFFFFFFFFFFFFF",
+            16,
+        )
+        .unwrap(),
+    );
 
     m.insert(
-    // 3072-bit
-    15,
-    BigUint::parse_bytes(
+        // 3072-bit
+        15,
+        BigUint::parse_bytes(
             b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1\
             29024E088A67CC74020BBEA63B139B22514A08798E3404DD\
             EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245\
@@ -69,13 +69,14 @@ lazy_static! {
             F12FFA06D98A0864D87602733EC86A64521F2B18177B200C\
             BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31\
             43DB5BFCE0FD108E4B82D120A93AD2CAFFFFFFFFFFFFFFFF",
-            16
-        ).unwrap()
+            16,
+        )
+        .unwrap(),
     );
     m.insert(
-    // 4096-bit
-    16,
-    BigUint::parse_bytes(
+        // 4096-bit
+        16,
+        BigUint::parse_bytes(
             b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1\
             29024E088A67CC74020BBEA63B139B22514A08798E3404DD\
             EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245\
@@ -98,13 +99,14 @@ lazy_static! {
             1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9\
             93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199\
             FFFFFFFFFFFFFFFF",
-            16
-        ).unwrap()
+            16,
+        )
+        .unwrap(),
     );
     m.insert(
-    // 6144-bit
-    17,
-     BigUint::parse_bytes(
+        // 6144-bit
+        17,
+        BigUint::parse_bytes(
             b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08\
              8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B\
              302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9\
@@ -133,15 +135,16 @@ lazy_static! {
              B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632\
              387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E\
              6DCC4024FFFFFFFFFFFFFFFF",
-            16
-        ).unwrap()
+            16,
+        )
+        .unwrap(),
     );
 
     m.insert(
-    // 8192-bit
-    18,
-    BigUint::parse_bytes(
-             b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1\
+        // 8192-bit
+        18,
+        BigUint::parse_bytes(
+            b"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1\
                29024E088A67CC74020BBEA63B139B22514A08798E3404DD\
                EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245\
                E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED\
@@ -184,12 +187,12 @@ lazy_static! {
                4009438B481C6CD7889A002ED5EE382BC9190DA6FC026E47\
                9558E4475677E9AA9E3050E2765694DFC81F56E880B96E71\
                60C980DD98EDD3DFFFFFFFFFFFFFFFFF",
-            16
-        ).unwrap()
+            16,
+        )
+        .unwrap(),
     );
     m
-    };
-}
+});
 
 /// Generating random number, should use num_bigint::RandomBits if possible.
 fn rand() -> usize {

diff --git a/src/lib.rs b/src/lib.rs
@@ -1,5 +1,3 @@
-#[macro_use]
-extern crate lazy_static;
 pub mod backtracking;
 pub mod big_integer;
 pub mod bit_manipulation;