Refactor

internal/importer/normalize.go

@@ -0,0 +1,58 @@
+// Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package importer
+
+import (
+	"math"
+
+	ccunits "github.com/ClusterCockpit/cc-units"
+)
+
+func getNormalizationFactor(v float64) (float64, int) {
+	count := 0
+	scale := -3
+
+	if v > 1000.0 {
+		for v > 1000.0 {
+			v *= 1e-3
+			count++
+		}
+	} else {
+		for v < 1.0 {
+			v *= 1e3
+			count++
+		}
+		scale = 3
+	}
+	return math.Pow10(count * scale), count * scale
+}
+
+func getExponent(p float64) int {
+	count := 0
+
+	for p > 1.0 {
+		p = p / 1000.0
+		count++
+	}
+
+	return count * 3
+}
+
+func newPrefixFromFactor(op ccunits.Prefix, e int) ccunits.Prefix {
+	f := float64(op)
+	exp := math.Pow10(getExponent(f) - e)
+	return ccunits.Prefix(exp)
+}
+
+func Normalize(avg float64, p string) (float64, string) {
+	f, e := getNormalizationFactor(avg)
+
+	if e != 0 {
+		np := newPrefixFromFactor(ccunits.NewPrefix(p), e)
+		return f, np.Prefix()
+	}
+
+	return f, p
+}