fast_able/
fasttime.rs

1// fasttime 模块，扩展 chrono 时间功能
2
3/// 微秒相关的常量和工具函数
4pub mod a8_micros {
5    /// 一毫秒的微秒数
6    pub const MICROS_PER_MILLIS: u64 = 1_000;
7}
8
9/// 为 NaiveTime 添加扩展方法
10pub mod b2_time {
11    use chrono::{Timelike, NaiveTime};
12    
13    /// 为 NaiveTime 添加的扩展方法
14    pub trait TimeExt {
15        /// 获取微秒值
16        fn micros_of_day(&self) -> u64;
17        
18        /// 从微秒创建时间
19        fn from_micros_day_unsafe(micros: u64) -> NaiveTime;
20        
21        /// 从小时、分钟、秒、毫秒创建时间
22        fn from_hmsi_friendly_unsafe(millis: u64) -> NaiveTime;
23
24        fn hour_minute(&self) -> u32;
25        
26        fn to_string6(&self) -> String;
27
28        fn to_string3(&self) -> String;
29    }
30    
31    impl TimeExt for NaiveTime {
32        fn micros_of_day(&self) -> u64 {
33            // 计算当日微秒数，使用 Timelike trait 的公开方法
34            let hour = self.hour() as u64;
35            let minute = self.minute() as u64;
36            let second = self.second() as u64;
37            let nano = self.nanosecond() as u64; // 公开的 nanosecond 方法
38            let micro = nano / 1000; // 纳秒转微秒
39            
40            (hour * 3600 + minute * 60 + second) * 1_000_000 + micro
41        }
42        
43        fn from_micros_day_unsafe(micros: u64) -> NaiveTime {
44            let seconds = (micros / 1_000_000) as u32;
45            let micros_remainder = (micros % 1_000_000) as u32;
46            let nanos = micros_remainder * 1000; // 微秒转纳秒
47            
48            let hours = seconds / 3600;
49            let minutes = (seconds % 3600) / 60;
50            let seconds = seconds % 60;
51            
52            NaiveTime::from_hms_nano_opt(hours, minutes, seconds, nanos).unwrap_or_default()
53        }
54        
55        fn from_hmsi_friendly_unsafe(millis: u64) -> NaiveTime {
56            let micros = millis * crate::fasttime::a8_micros::MICROS_PER_MILLIS;
57            Self::from_micros_day_unsafe(micros)
58        }
59
60        fn hour_minute(&self) -> u32 {
61            self.hour() * 100 + self.minute()
62        }
63
64        fn to_string6(&self) -> String {
65            self.format("%H:%M:%S.%6f").to_string()
66        }
67        
68        fn to_string3(&self) -> String {
69            self.format("%H:%M:%S.%3f").to_string()
70        }
71    }
72}
fast_able/fasttime.rs

fast_able/
fasttime.rs
