Added gallons and gallons per minute (#35)

Co-authored-by: Zachary Levy <zachary@sunforge.is>
Reviewed-on: #35

quantity/volume.odin

@@ -2,6 +2,8 @@ package quantity
 
 import "base:intrinsics"
 
+LITERS_PER_GALLON :: 3.785411784
+
 //----- Liters ----------------------------------
 Liters :: struct($V: typeid) where intrinsics.type_is_numeric(V) {
 	v: V,
@@ -9,9 +11,16 @@ Liters :: struct($V: typeid) where intrinsics.type_is_numeric(V) {
 
 @(private = "file")
 liters_to_milli_liters :: #force_inline proc "contextless" (
-    liters: Liters($V),
+	liters: Liters($V),
 ) -> Milli_Liters(V) where intrinsics.type_is_numeric(V) {
-    return Milli_Liters(V){liters.v * MILLI}
+	return Milli_Liters(V){liters.v * MILLI}
+}
+
+@(private = "file")
+liters_to_gallons :: #force_inline proc "contextless" (
+	liters: Liters($V),
+) -> Gallons(V) where intrinsics.type_is_float(V) {
+	return Gallons(V){liters.v / LITERS_PER_GALLON}
 }
 
 //----- Milliliters ----------------------------------
@@ -26,15 +35,32 @@ milli_liters_to_liters :: #force_inline proc "contextless" (
 	return Liters(V){milli_liters.v / MILLI}
 }
 
+//----- Gallons ----------------------------------
+Gallons :: struct($V: typeid) where intrinsics.type_is_numeric(V) {
+	v: V,
+}
+
+@(private = "file")
+gallons_to_liters :: #force_inline proc "contextless" (
+	gallons: Gallons($V),
+) -> Liters(V) where intrinsics.type_is_float(V) {
+	return Liters(V){gallons.v * LITERS_PER_GALLON}
+}
+
 // ---------------------------------------------------------------------------------------------------------------------
 // ----- Conversion Overloads ------------------------
 // ---------------------------------------------------------------------------------------------------------------------
 to_liters :: proc {
-    milli_liters_to_liters,
+	milli_liters_to_liters,
+	gallons_to_liters,
 }
 
 to_milli_liters :: proc {
-    liters_to_milli_liters,
+	liters_to_milli_liters,
+}
+
+to_gallons :: proc {
+	liters_to_gallons,
 }
 
 // ---------------------------------------------------------------------------------------------------------------------
@@ -44,16 +70,32 @@ import "core:testing"
 
 @(test)
 test_liters_to_milli_liters :: proc(t: ^testing.T) {
-    liters := Liters(int){12}
-    milli_liters := to_milli_liters(liters)
+	liters := Liters(int){12}
+	milli_liters := to_milli_liters(liters)
 
-    testing.expect_value(t, milli_liters, Milli_Liters(int){12_000})
+	testing.expect_value(t, milli_liters, Milli_Liters(int){12_000})
 }
 
 @(test)
 test_milli_liters_to_liters :: proc(t: ^testing.T) {
-    milli_liters := Milli_Liters(int){12_000}
-    liters := to_liters(milli_liters)
+	milli_liters := Milli_Liters(int){12_000}
+	liters := to_liters(milli_liters)
 
-    testing.expect_value(t, liters, Liters(int){12})
+	testing.expect_value(t, liters, Liters(int){12})
+}
+
+@(test)
+test_gallons_to_liters :: proc(t: ^testing.T) {
+	gallons := Gallons(f32){1}
+	liters := to_liters(gallons)
+
+	testing.expect(t, liters.v > 3.78 && liters.v < 3.79)
+}
+
+@(test)
+test_liters_to_gallons :: proc(t: ^testing.T) {
+	liters := Liters(f32){3.785411784}
+	gallons := to_gallons(liters)
+
+	testing.expect(t, gallons.v > 0.99 && gallons.v < 1.01)
 }

quantity/volume_rate.odin

@@ -2,6 +2,58 @@ package quantity
 
 import "base:intrinsics"
 
+//----- Liters Per Minute ----------------------------------
 Liters_Per_Minute :: struct($V: typeid) where intrinsics.type_is_numeric(V) {
 	v: V,
 }
+
+@(private = "file")
+liters_per_minute_to_gallons_per_minute :: #force_inline proc "contextless" (
+	liters_per_minute: Liters_Per_Minute($V),
+) -> Gallons_Per_Minute(V) where intrinsics.type_is_float(V) {
+	return Gallons_Per_Minute(V){liters_per_minute.v / LITERS_PER_GALLON}
+}
+
+//----- Gallons Per Minute ----------------------------------
+Gallons_Per_Minute :: struct($V: typeid) where intrinsics.type_is_numeric(V) {
+	v: V,
+}
+
+@(private = "file")
+gallons_per_minute_to_liters_per_minute :: #force_inline proc "contextless" (
+	gallons_per_minute: Gallons_Per_Minute($V),
+) -> Liters_Per_Minute(V) where intrinsics.type_is_float(V) {
+	return Liters_Per_Minute(V){gallons_per_minute.v * LITERS_PER_GALLON}
+}
+
+// ---------------------------------------------------------------------------------------------------------------------
+// ----- Conversion Overloads ------------------------
+// ---------------------------------------------------------------------------------------------------------------------
+to_liters_per_minute :: proc {
+	gallons_per_minute_to_liters_per_minute,
+}
+
+to_gallons_per_minute :: proc {
+	liters_per_minute_to_gallons_per_minute,
+}
+
+// ---------------------------------------------------------------------------------------------------------------------
+// ----- Tests ------------------------
+// ---------------------------------------------------------------------------------------------------------------------
+import "core:testing"
+
+@(test)
+test_gallons_per_minute_to_liters_per_minute :: proc(t: ^testing.T) {
+	gallons_per_minute := Gallons_Per_Minute(f32){1}
+	liters_per_minute := to_liters_per_minute(gallons_per_minute)
+
+	testing.expect(t, liters_per_minute.v > 3.78 && liters_per_minute.v < 3.79)
+}
+
+@(test)
+test_liters_per_minute_to_gallons_per_minute :: proc(t: ^testing.T) {
+	liters_per_minute := Liters_Per_Minute(f32){3.785411784}
+	gallons_per_minute := to_gallons_per_minute(liters_per_minute)
+
+	testing.expect(t, gallons_per_minute.v > 0.99 && gallons_per_minute.v < 1.01)
+}