Some basic TUI widgets ported to Go

tools/utils/humanize/bytes.go

@@ -0,0 +1,61 @@
+package humanize
+
+import (
+	"fmt"
+	"math"
+)
+
+// IEC Sizes.
+// kibis of bits
+const (
+	Byte = 1 << (iota * 10)
+	KiByte
+	MiByte
+	GiByte
+	TiByte
+	PiByte
+	EiByte
+)
+
+// SI Sizes.
+const (
+	IByte = 1
+	KByte = IByte * 1000
+	MByte = KByte * 1000
+	GByte = MByte * 1000
+	TByte = GByte * 1000
+	PByte = TByte * 1000
+	EByte = PByte * 1000
+)
+
+func logn(n, b float64) float64 {
+	return math.Log(n) / math.Log(b)
+}
+
+func humanize_bytes(s uint64, base float64, sizes []string, sep string) string {
+	if s < 10 {
+		return fmt.Sprintf("%d%sB", s, sep)
+	}
+	e := math.Floor(logn(float64(s), base))
+	suffix := sizes[int(e)]
+	val := math.Floor(float64(s)/math.Pow(base, e)*10+0.5) / 10
+	f := "%.0f%s%s"
+	if val < 10 {
+		f = "%.1f%s%s"
+	}
+	return fmt.Sprintf(f, val, sep, suffix)
+}
+
+// Bytes produces a human readable representation of an SI size.
+// Bytes(82854982) -> 83 MB
+func Bytes(s uint64) string {
+	sizes := []string{"B", "kB", "MB", "GB", "TB", "PB", "EB"}
+	return humanize_bytes(s, 1000, sizes, " ")
+}
+
+// IBytes produces a human readable representation of an IEC size.
+// IBytes(82854982) -> 79 MiB
+func IBytes(s uint64) string {
+	sizes := []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"}
+	return humanize_bytes(s, 1024, sizes, " ")
+}