feat(serial):基本完成UUID和Short UUID的生成功能。

src/serial_code/mod.rs

@@ -3,3 +3,46 @@ pub mod uuid {
         Box::from(uuid::Uuid::new_v4().to_string())
     }
 }
+
+pub mod short_uuid {
+    const STR_SRC: &str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
+    pub fn new(length: i16) -> Box<String> {
+        let length = if length < 2 {
+            2
+        } else if length > 128 {
+            128
+        } else {
+            length
+        };
+        let choices = STR_SRC.as_bytes();
+        let mut uuid = uuid::Uuid::new_v4().as_u128();
+        let mut mask = 0_u128;
+        let mut result_bits: Vec<i64> = Vec::new();
+        let (mask_length, last_mask_length) = if 128 % length == 0 {
+            (128 / length, 0)
+        } else {
+            (128 / length + 1, 128 / length - 128 % length)
+        };
+        for _ in 1..mask_length {
+            mask = (mask << 1) | 0b1;
+        }
+        if last_mask_length > 0 {
+            let mut last_mask = 0_u128;
+            for _ in 1..last_mask_length {
+                last_mask = (last_mask << 1) | 0b1;
+            }
+            result_bits.push(((uuid & last_mask) as i64) % choices.len() as i64);
+            uuid = uuid >> last_mask_length;
+        }
+        for _ in 0..(length - if last_mask_length > 0 { 1 } else { 0 }) {
+            result_bits.push(((uuid & mask) as i64) % choices.len() as i64);
+            uuid = uuid >> mask_length;
+        }
+        let mut code: Vec<String> = Vec::new();
+        result_bits.reverse();
+        for i in result_bits {
+            code.push(String::from_utf8(vec![choices[i as usize]]).unwrap());
+        }
+        Box::from(code.join(""))
+    }
+}