88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
package pb
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import (
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"fmt"
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"strings"
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"time"
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)
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type Units int
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const (
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// U_NO are default units, they represent a simple value and are not formatted at all.
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U_NO Units = iota
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// U_BYTES units are formatted in a human readable way (b, Bb, Mb, ...)
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U_BYTES
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// U_DURATION units are formatted in a human readable way (3h14m15s)
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U_DURATION
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)
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func Format(i int64) *formatter {
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return &formatter{n: i}
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}
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type formatter struct {
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n int64
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unit Units
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width int
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perSec bool
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}
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func (f *formatter) Value(n int64) *formatter {
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f.n = n
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return f
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}
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func (f *formatter) To(unit Units) *formatter {
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f.unit = unit
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return f
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}
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func (f *formatter) Width(width int) *formatter {
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f.width = width
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return f
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}
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func (f *formatter) PerSec() *formatter {
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f.perSec = true
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return f
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}
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func (f *formatter) String() (out string) {
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switch f.unit {
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case U_BYTES:
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out = formatBytes(f.n)
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case U_DURATION:
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d := time.Duration(f.n)
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if d > time.Hour*24 {
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out = fmt.Sprintf("%dd", d/24/time.Hour)
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d -= (d / time.Hour / 24) * (time.Hour * 24)
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}
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out = fmt.Sprintf("%s%v", out, d)
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default:
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out = fmt.Sprintf(fmt.Sprintf("%%%dd", f.width), f.n)
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}
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if f.perSec {
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out += "/s"
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}
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return
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}
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// Convert bytes to human readable string. Like a 2 MB, 64.2 KB, 52 B
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func formatBytes(i int64) (result string) {
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switch {
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case i > (1024 * 1024 * 1024 * 1024):
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result = fmt.Sprintf("%.02f TB", float64(i)/1024/1024/1024/1024)
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case i > (1024 * 1024 * 1024):
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result = fmt.Sprintf("%.02f GB", float64(i)/1024/1024/1024)
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case i > (1024 * 1024):
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result = fmt.Sprintf("%.02f MB", float64(i)/1024/1024)
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case i > 1024:
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result = fmt.Sprintf("%.02f KB", float64(i)/1024)
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default:
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result = fmt.Sprintf("%d B", i)
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}
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result = strings.Trim(result, " ")
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return
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}
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