rust_rcs_core/util/
rand.rs

1// Copyright 2023 宋昊文
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use rand::prelude::*;
16
17pub fn create_raw_alpha_numeric_string(length: usize) -> Vec<u8> {
18    let mut s = Vec::with_capacity(length);
19    let mut rng = rand::thread_rng();
20    for _ in 0..length {
21        let mut c = rng.gen_range(0..62);
22        if c < 10 {
23            c = 48 + c
24        } else if c < 36 {
25            c = 65 + c - 10
26        } else {
27            c = 97 + c - 36
28        }
29        s.push(c);
30    }
31    s
32}
33
34#[cfg(test)]
35mod tests {
36    use super::create_raw_alpha_numeric_string;
37
38    #[test]
39    fn test_create_raw_alpha_numeric_string() {
40        let data = create_raw_alpha_numeric_string(16);
41        let s = String::from_utf8_lossy(&data);
42
43        println!("{}", &s);
44
45        assert_eq!(s.len(), 16)
46    }
47}
rust_rcs_core/util/rand.rs

rust_rcs_core/util/
rand.rs
