risingwave_common/util/
pretty_bytes.rs

1// Copyright 2025 RisingWave Labs
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 number_prefix::NumberPrefix;
16
17/// convert bytes to binary pretty format
18pub fn convert(num_bytes: f64) -> String {
19    match NumberPrefix::binary(num_bytes) {
20        NumberPrefix::Standalone(bytes) => {
21            format!("{} bytes", bytes)
22        }
23        NumberPrefix::Prefixed(prefix, n) => {
24            format!("{:.2} {}B", n, prefix)
25        }
26    }
27}
28
29#[cfg(test)]
30mod test {
31    use super::convert;
32
33    #[test]
34    fn test_bytes_convert() {
35        let base = 1024_f64;
36
37        assert_eq!(convert(1_f64), "1 bytes".to_owned());
38        assert_eq!(convert(base), "1.00 KiB".to_owned());
39        assert_eq!(convert(base * base), "1.00 MiB".to_owned());
40        assert_eq!(convert(base * base * base), "1.00 GiB".to_owned());
41    }
42}
risingwave_common/util/pretty_bytes.rs

risingwave_common/util/
pretty_bytes.rs
