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

README.md

@@ -19,7 +19,7 @@ Rust 中可以使用的常用辅助功能工具箱。主要配备以下功能：
 - 唯一序列号生成器
   - [ ] 改进版雪花 ID 生成器(短主机精简日期版)
   - [x] UUID 生成器
-  - [ ] short UUID 生成器
+  - [x] short UUID 生成器
 - 签名算法
   - [ ] RSA 签名算法
 - 验证码生成器

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(""))
+    }
+}

tests/serial_codes.rs

@@ -0,0 +1,20 @@
+#[cfg(test)]
+mod uuid_test {
+    #[test]
+    fn gen_uuid() {
+        let uuid = rs_toolbox::serial_code::uuid::new();
+        println!("{}", uuid);
+    }
+}
+
+#[cfg(test)]
+mod short_uuid_test {
+    #[test]
+    fn gen_short() {
+        let short_uuid = rs_toolbox::serial_code::short_uuid::new(10);
+        println!("{}", short_uuid);
+        if short_uuid.len() != 10 {
+            panic!("short_uuid length is not enough");
+        }
+    }
+}