mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-11-25 12:11:35 +00:00
144 lines
2.5 KiB
Go
144 lines
2.5 KiB
Go
package humanize
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"strconv"
|
|
"strings"
|
|
"unicode"
|
|
)
|
|
|
|
// 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
|
|
)
|
|
|
|
var bytesSizeTable = map[string]uint64{
|
|
"b": Byte,
|
|
"kib": KiByte,
|
|
"kb": KByte,
|
|
"mib": MiByte,
|
|
"mb": MByte,
|
|
"gib": GiByte,
|
|
"gb": GByte,
|
|
"tib": TiByte,
|
|
"tb": TByte,
|
|
"pib": PiByte,
|
|
"pb": PByte,
|
|
"eib": EiByte,
|
|
"eb": EByte,
|
|
// Without suffix
|
|
"": Byte,
|
|
"ki": KiByte,
|
|
"k": KByte,
|
|
"mi": MiByte,
|
|
"m": MByte,
|
|
"gi": GiByte,
|
|
"g": GByte,
|
|
"ti": TiByte,
|
|
"t": TByte,
|
|
"pi": PiByte,
|
|
"p": PByte,
|
|
"ei": EiByte,
|
|
"e": EByte,
|
|
}
|
|
|
|
func logn(n, b float64) float64 {
|
|
return math.Log(n) / math.Log(b)
|
|
}
|
|
|
|
func humanateBytes(s uint64, base float64, sizes []string) string {
|
|
if s < 10 {
|
|
return fmt.Sprintf("%d B", s)
|
|
}
|
|
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"
|
|
if val < 10 {
|
|
f = "%.1f %s"
|
|
}
|
|
|
|
return fmt.Sprintf(f, val, suffix)
|
|
}
|
|
|
|
// Bytes produces a human readable representation of an SI size.
|
|
//
|
|
// See also: ParseBytes.
|
|
//
|
|
// Bytes(82854982) -> 83 MB
|
|
func Bytes(s uint64) string {
|
|
sizes := []string{"B", "kB", "MB", "GB", "TB", "PB", "EB"}
|
|
return humanateBytes(s, 1000, sizes)
|
|
}
|
|
|
|
// IBytes produces a human readable representation of an IEC size.
|
|
//
|
|
// See also: ParseBytes.
|
|
//
|
|
// IBytes(82854982) -> 79 MiB
|
|
func IBytes(s uint64) string {
|
|
sizes := []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"}
|
|
return humanateBytes(s, 1024, sizes)
|
|
}
|
|
|
|
// ParseBytes parses a string representation of bytes into the number
|
|
// of bytes it represents.
|
|
//
|
|
// See Also: Bytes, IBytes.
|
|
//
|
|
// ParseBytes("42 MB") -> 42000000, nil
|
|
// ParseBytes("42 mib") -> 44040192, nil
|
|
func ParseBytes(s string) (uint64, error) {
|
|
lastDigit := 0
|
|
hasComma := false
|
|
for _, r := range s {
|
|
if !(unicode.IsDigit(r) || r == '.' || r == ',') {
|
|
break
|
|
}
|
|
if r == ',' {
|
|
hasComma = true
|
|
}
|
|
lastDigit++
|
|
}
|
|
|
|
num := s[:lastDigit]
|
|
if hasComma {
|
|
num = strings.Replace(num, ",", "", -1)
|
|
}
|
|
|
|
f, err := strconv.ParseFloat(num, 64)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
extra := strings.ToLower(strings.TrimSpace(s[lastDigit:]))
|
|
if m, ok := bytesSizeTable[extra]; ok {
|
|
f *= float64(m)
|
|
if f >= math.MaxUint64 {
|
|
return 0, fmt.Errorf("too large: %v", s)
|
|
}
|
|
return uint64(f), nil
|
|
}
|
|
|
|
return 0, fmt.Errorf("unhandled size name: %v", extra)
|
|
}
|