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package pb
import (
"fmt"
"time"
)
type Units int
const (
// U_NO are default units, they represent a simple value and are not formatted at all.
U_NO Units = iota
// U_BYTES units are formatted in a human readable way (B, KiB, MiB, ...)
U_BYTES
// U_BYTES_DEC units are like U_BYTES, but base 10 (B, KB, MB, ...)
U_BYTES_DEC
// U_DURATION units are formatted in a human readable way (3h14m15s)
U_DURATION
)
const (
KiB = 1024
MiB = 1048576
GiB = 1073741824
TiB = 1099511627776
KB = 1e3
MB = 1e6
GB = 1e9
TB = 1e12
)
func Format(i int64) *formatter {
return &formatter{n: i}
}
type formatter struct {
n int64
unit Units
width int
perSec bool
}
func (f *formatter) To(unit Units) *formatter {
f.unit = unit
return f
}
func (f *formatter) Width(width int) *formatter {
f.width = width
return f
}
func (f *formatter) PerSec() *formatter {
f.perSec = true
return f
}
func (f *formatter) String() (out string) {
switch f.unit {
case U_BYTES:
out = formatBytes(f.n)
case U_BYTES_DEC:
out = formatBytesDec(f.n)
case U_DURATION:
out = formatDuration(f.n)
default:
out = fmt.Sprintf(fmt.Sprintf("%%%dd", f.width), f.n)
}
if f.perSec {
out += "/s"
}
return
}
// Convert bytes to human readable string. Like 2 MiB, 64.2 KiB, 52 B
func formatBytes(i int64) (result string) {
switch {
case i >= TiB:
result = fmt.Sprintf("%.02f TiB", float64(i)/TiB)
case i >= GiB:
result = fmt.Sprintf("%.02f GiB", float64(i)/GiB)
case i >= MiB:
result = fmt.Sprintf("%.02f MiB", float64(i)/MiB)
case i >= KiB:
result = fmt.Sprintf("%.02f KiB", float64(i)/KiB)
default:
result = fmt.Sprintf("%d B", i)
}
return
}
// Convert bytes to base-10 human readable string. Like 2 MB, 64.2 KB, 52 B
func formatBytesDec(i int64) (result string) {
switch {
case i >= TB:
result = fmt.Sprintf("%.02f TB", float64(i)/TB)
case i >= GB:
result = fmt.Sprintf("%.02f GB", float64(i)/GB)
case i >= MB:
result = fmt.Sprintf("%.02f MB", float64(i)/MB)
case i >= KB:
result = fmt.Sprintf("%.02f KB", float64(i)/KB)
default:
result = fmt.Sprintf("%d B", i)
}
return
}
func formatDuration(n int64) (result string) {
d := time.Duration(n)
if d > time.Hour*24 {
result = fmt.Sprintf("%dd", d/24/time.Hour)
d -= (d / time.Hour / 24) * (time.Hour * 24)
}
if d > time.Hour {
result = fmt.Sprintf("%s%dh", result, d/time.Hour)
d -= d / time.Hour * time.Hour
}
m := d / time.Minute
d -= m * time.Minute
s := d / time.Second
result = fmt.Sprintf("%s%02dm%02ds", result, m, s)
return
}
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