From 3e4fb93a594f11a80904653396698d6c70e07cb0 Mon Sep 17 00:00:00 2001
From: Niklas Halle <niklas@niklashalle.net>
Date: Sat, 31 Oct 2020 20:44:44 +0100
Subject: Initial public release

---
 src/metric/frequency.rs | 59 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/metric/frequency.rs

(limited to 'src/metric/frequency.rs')

diff --git a/src/metric/frequency.rs b/src/metric/frequency.rs
new file mode 100644
index 0000000..c35f874
--- /dev/null
+++ b/src/metric/frequency.rs
@@ -0,0 +1,59 @@
+use std::fmt::{Display, Formatter, Result};
+use std::ops::{Add, Sub, AddAssign, SubAssign, Div, Mul, DivAssign, MulAssign};
+
+use crate::metric::Unit;
+use crate::metric::Primitive;
+
+use crate::declare_unit_basics;
+
+use crate::metric::time::Time;
+
+#[derive(Copy, Clone, Debug, PartialOrd, PartialEq)]
+pub enum Frequency {
+    Base(f64, fn(f64) -> f64, &'static str),
+    Canonical(f64),
+    Hertz(f64),
+    Becquerel(f64),
+}
+
+impl Unit<Frequency> for Frequency {
+    fn to_si_unit(&self) -> Frequency {
+        match self {
+            Frequency::Base(_, _, _) => self.clone(),
+            Frequency::Canonical(value) => Frequency::Base(value.clone(), |x| x, "Hz"),
+            Frequency::Hertz(value) => Frequency::Base(value.clone(), |x| x, "Hz"),
+            Frequency::Becquerel(value) => Frequency::Base(value.clone(), |x| x, "Bq"),
+        }
+    }
+}
+
+declare_unit_basics!(Frequency);
+
+// 1/s = Hz
+impl Div<Time> for f64 {
+    type Output = Frequency;
+
+    fn div(self, rhs: Time) -> Self::Output {
+        Frequency::Canonical(self * rhs.to_si_primitive())
+    }
+}
+
+// Hz * s = 1
+impl Mul<Time> for Frequency {
+    type Output = f64;
+
+    fn mul(self, rhs: Time) -> Self::Output {
+        self.to_si_primitive() * rhs.to_si_primitive()
+    }
+}
+
+// s * Hz = 1
+impl Mul<Frequency> for Time {
+    type Output = f64;
+
+    fn mul(self, rhs: Frequency) -> Self::Output {
+        self.to_si_primitive() * rhs.to_si_primitive()
+    }
+}
+
+pub type Activity = Frequency;
\ No newline at end of file
-- 
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