Name change, the official usage is prefix

internal/ccUnits/ccUnitPrefix.go

@@ -0,0 +1,131 @@
+package ccunits
+
+import "regexp"
+
+type Prefix float64
+
+const (
+	Base  Prefix = iota
+	Peta         = 1e15
+	Tera         = 1e12
+	Giga         = 1e9
+	Mega         = 1e6
+	Kilo         = 1e3
+	Milli        = 1e-3
+	Micro        = 1e-6
+	Nano         = 1e-9
+	Kibi         = 1024
+	Mebi         = 1024 * 1024
+	Gibi         = 1024 * 1024 * 1024
+	Tebi         = 1024 * 1024 * 1024 * 1024
+)
+const prefixRegexStr = `^([kKmMgGtTpP]?[i]?)(.*)`
+
+var prefixRegex = regexp.MustCompile(prefixRegexStr)
+
+func (s *Prefix) String() string {
+	switch *s {
+	case Base:
+		return ""
+	case Kilo:
+		return "Kilo"
+	case Mega:
+		return "Mega"
+	case Giga:
+		return "Giga"
+	case Tera:
+		return "Tera"
+	case Peta:
+		return "Peta"
+	case Milli:
+		return "Milli"
+	case Micro:
+		return "Micro"
+	case Nano:
+		return "Nano"
+	case Kibi:
+		return "Kibi"
+	case Mebi:
+		return "Mebi"
+	case Gibi:
+		return "Gibi"
+	case Tebi:
+		return "Tebi"
+	default:
+		return "Unkn"
+	}
+}
+
+func (s *Prefix) Prefix() string {
+	switch *s {
+	case Base:
+		return ""
+	case Kilo:
+		return "K"
+	case Mega:
+		return "M"
+	case Giga:
+		return "G"
+	case Tera:
+		return "T"
+	case Peta:
+		return "P"
+	case Milli:
+		return "m"
+	case Micro:
+		return "u"
+	case Nano:
+		return "n"
+	case Kibi:
+		return "Ki"
+	case Mebi:
+		return "Mi"
+	case Gibi:
+		return "Gi"
+	case Tebi:
+		return "Ti"
+	default:
+		return "<unkn>"
+	}
+}
+
+func NewPrefix(prefix string) Prefix {
+	switch prefix {
+	case "k":
+		return Kilo
+	case "K":
+		return Kilo
+	case "m":
+		return Milli
+	case "M":
+		return Mega
+	case "g":
+		return Giga
+	case "G":
+		return Giga
+	case "t":
+		return Tera
+	case "T":
+		return Tera
+	case "u":
+		return Micro
+	case "n":
+		return Nano
+	case "ki":
+		return Kibi
+	case "Ki":
+		return Kibi
+	case "Mi":
+		return Mebi
+	case "gi":
+		return Gibi
+	case "Gi":
+		return Gibi
+	case "Ti":
+		return Tebi
+	case "":
+		return Base
+	default:
+		return Base
+	}
+}