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/length.rs | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/metric/length.rs

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

diff --git a/src/metric/length.rs b/src/metric/length.rs
new file mode 100644
index 0000000..a605ad2
--- /dev/null
+++ b/src/metric/length.rs
@@ -0,0 +1,44 @@
+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;
+
+#[derive(Copy, Clone, Debug, PartialOrd, PartialEq)]
+pub enum Length {
+    Base(f64, fn(f64) -> f64, &'static str),
+    Canonical(f64),
+    Meter(f64),
+    Metre(f64),
+    Centimeter(f64),
+    Centimetre(f64),
+    Kilometer(f64),
+    Kilometre(f64),
+    Inch(f64), // Zoll
+    Foot(f64), // Fuß
+    Yard(f64), // Schritt
+    Mile(f64), // Meile
+}
+
+impl Unit<Length> for Length {
+    fn to_si_unit(&self) -> Length {
+        match self {
+            Length::Base(_, _, _) => self.clone(),
+            Length::Canonical(value) => Length::Base(value.clone(), |x| x, "m"),
+            Length::Meter(value) => Length::Base(value.clone(), |x| x, "m"),
+            Length::Metre(value) => Length::Base(value.clone(), |x| x, "m"),
+            Length::Centimeter(value) => Length::Base(value / 100.0, |x| x * 100.0, "cm"),
+            Length::Centimetre(value) => Length::Base(value / 100.0, |x| x * 100.0, "cm"),
+            Length::Kilometer(value) => Length::Base(value * 1000.0, |x| x / 1000.0, "km"),
+            Length::Kilometre(value) => Length::Base(value * 1000.0, |x| x / 1000.0, "km"),
+            Length::Inch(value) => Length::Base(value * 0.0254, |x| x / 0.0254, "in"),
+            Length::Foot(value) => Length::Base(value * 0.3048, |x| x / 0.3048, "foot"),
+            Length::Yard(value) => Length::Base(value * 0.9144, |x| x / 0.9144, "yard"),
+            Length::Mile(value) => Length::Base(value * 1609.344, |x| x / 1609.344, "mile"),
+        }
+    }
+}
+
+declare_unit_basics!(Length);
\ No newline at end of file
-- 
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