From: Tim "tim3z" Zeitz <dev@tim3z.net>
Date: Thu, 16 Dec 2021 09:46:05 +0000 (+0100)
Subject: remove time crate and use std lib
X-Git-Url: https://i11git.iti.kit.edu/anon-gitweb/?p=Mitarbeiter%2FTim-Zeitz%2Fstud-rust-base.git;a=commitdiff_plain;h=0cce9e796127fea9c3387e05ce2c68a1eeb0a83c

remove time crate and use std lib
---

diff --git a/src/time.rs b/src/time.rs
index 687f3e4..33c720c 100644
--- a/src/time.rs
+++ b/src/time.rs
@@ -1,28 +1,29 @@
 //! This module contains a few utilities to measure how long executing algorithms takes.
-//! It utilizes the `time` crate.
+
+use std::time::*;
 
 /// This function will measure how long it takes to execute the given lambda,
 /// print the time and return the result of the lambda.
 pub fn report_time<Out, F: FnOnce() -> Out>(name: &str, f: F) -> Out {
-    let start = time::now();
+    let start = Instant::now();
     eprintln!("starting {}", name);
     let res = f();
-    eprintln!("done {} - took: {}", name, (time::now() - start));
+    eprintln!("done {} - took: {}s", name, start.elapsed().as_secs_f64());
     res
 }
 
 /// This function will measure how long it takes to execute the given lambda
 /// and return a tuple of the result of the lambda and a duration object.
-pub fn measure<Out, F: FnOnce() -> Out>(f: F) -> (Out, time::Duration) {
-    let start = time::now();
+pub fn measure<Out, F: FnOnce() -> Out>(f: F) -> (Out, Duration) {
+    let start = Instant::now();
     let res = f();
-    (res, time::now() - start)
+    (res, start.elapsed())
 }
 
 /// A struct to repeatedly measure the time passed since the timer was started
 #[derive(Debug)]
 pub struct Timer {
-    start: time::Tm
+    start: Instant,
 }
 
 impl Default for Timer {
@@ -34,21 +35,26 @@ impl Default for Timer {
 impl Timer {
     /// Create and start a new `Timer`
     pub fn new() -> Timer {
-        Timer { start: time::now() }
+        Timer { start: Instant::now() }
     }
 
     /// Reset the `Timer`
     pub fn restart(&mut self) {
-        self.start = time::now();
+        self.start = Instant::now();
     }
 
     /// Print the passed time in ms since the timer was started
     pub fn report_passed_ms(&self) {
-        eprintln!("{}ms", (time::now() - self.start).num_milliseconds());
+        eprintln!("{}ms", self.start.elapsed().as_secs_f64() * 1000.0);
     }
 
     /// Return the number of ms passed since the timer was started as a `i64`
-    pub fn get_passed_ms(&self) -> i64 {
-        (time::now() - self.start).num_milliseconds()
+    pub fn get_passed_ms(&self) -> f64 {
+        self.start.elapsed().as_secs_f64() * 1000.0
+    }
+
+    /// Return the number of ms passed since the timer was started as a `std::time::Duration`
+    pub fn get_passed(&self) -> Duration {
+        self.start.elapsed()
     }
 }