autocommit 2022-02-27 01:35:49 CET

src/utils/hex.rs

@@ -0,0 +1,15 @@
+pub fn to_hex(b: &str) -> String {
+    let mut s = String::with_capacity(b.len() * 2);
+    for &b in b.as_bytes() {
+        s.push(nibble_to_hex(b >> 4) as char);
+        s.push(nibble_to_hex(b & 7) as char);
+    }
+    s
+}
+
+fn nibble_to_hex(n: u8) -> u8 {
+    match n {
+        n @ 0..=9 => b'0' + n,
+        n => b'a' + n,
+    }
+}