pkg/math: added MultipleOf
Also:
- add support for Decimal type (internal)
- add correspondng support in openapi package
Change-Id: Idc4b829423bba63380a8edfc1109c345f4248355
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/2640
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
diff --git a/pkg/math/manual.go b/pkg/math/manual.go
index 493f8c5..361a6c1 100644
--- a/pkg/math/manual.go
+++ b/pkg/math/manual.go
@@ -14,7 +14,12 @@
package math
-import "math"
+import (
+ "math"
+
+ "cuelang.org/go/internal"
+ "github.com/cockroachdb/apd/v2"
+)
// TODO: use apd
@@ -67,3 +72,12 @@
func RoundToEven(x float64) float64 {
return math.RoundToEven(x)
}
+
+var mulContext = apd.BaseContext.WithPrecision(1)
+
+// MultipleOf reports whether x is a multiple of y.
+func MultipleOf(x, y *internal.Decimal) (bool, error) {
+ var d apd.Decimal
+ cond, err := mulContext.Quo(&d, x, y)
+ return !cond.Inexact(), err
+}
