mirror of https://github.com/XTLS/Xray-core
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
1.8 KiB
101 lines
1.8 KiB
package units
|
|
|
|
import (
|
|
"errors"
|
|
"strconv"
|
|
"strings"
|
|
"unicode"
|
|
)
|
|
|
|
var (
|
|
errInvalidSize = errors.New("invalid size")
|
|
errInvalidUnit = errors.New("invalid or unsupported unit")
|
|
)
|
|
|
|
// ByteSize is the size of bytes
|
|
type ByteSize uint64
|
|
|
|
const (
|
|
_ = iota
|
|
// KB = 1KB
|
|
KB ByteSize = 1 << (10 * iota)
|
|
// MB = 1MB
|
|
MB
|
|
// GB = 1GB
|
|
GB
|
|
// TB = 1TB
|
|
TB
|
|
// PB = 1PB
|
|
PB
|
|
// EB = 1EB
|
|
EB
|
|
)
|
|
|
|
func (b ByteSize) String() string {
|
|
unit := ""
|
|
value := float64(0)
|
|
switch {
|
|
case b == 0:
|
|
return "0"
|
|
case b < KB:
|
|
unit = "B"
|
|
value = float64(b)
|
|
case b < MB:
|
|
unit = "KB"
|
|
value = float64(b) / float64(KB)
|
|
case b < GB:
|
|
unit = "MB"
|
|
value = float64(b) / float64(MB)
|
|
case b < TB:
|
|
unit = "GB"
|
|
value = float64(b) / float64(GB)
|
|
case b < PB:
|
|
unit = "TB"
|
|
value = float64(b) / float64(TB)
|
|
case b < EB:
|
|
unit = "PB"
|
|
value = float64(b) / float64(PB)
|
|
default:
|
|
unit = "EB"
|
|
value = float64(b) / float64(EB)
|
|
}
|
|
result := strconv.FormatFloat(value, 'f', 2, 64)
|
|
result = strings.TrimSuffix(result, ".0")
|
|
return result + unit
|
|
}
|
|
|
|
// Parse parses ByteSize from string
|
|
func (b *ByteSize) Parse(s string) error {
|
|
s = strings.TrimSpace(s)
|
|
s = strings.ToUpper(s)
|
|
i := strings.IndexFunc(s, unicode.IsLetter)
|
|
if i == -1 {
|
|
return errInvalidUnit
|
|
}
|
|
|
|
bytesString, multiple := s[:i], s[i:]
|
|
bytes, err := strconv.ParseFloat(bytesString, 64)
|
|
if err != nil || bytes <= 0 {
|
|
return errInvalidSize
|
|
}
|
|
switch multiple {
|
|
case "B":
|
|
*b = ByteSize(bytes)
|
|
case "K", "KB", "KIB":
|
|
*b = ByteSize(bytes * float64(KB))
|
|
case "M", "MB", "MIB":
|
|
*b = ByteSize(bytes * float64(MB))
|
|
case "G", "GB", "GIB":
|
|
*b = ByteSize(bytes * float64(GB))
|
|
case "T", "TB", "TIB":
|
|
*b = ByteSize(bytes * float64(TB))
|
|
case "P", "PB", "PIB":
|
|
*b = ByteSize(bytes * float64(PB))
|
|
case "E", "EB", "EIB":
|
|
*b = ByteSize(bytes * float64(EB))
|
|
default:
|
|
return errInvalidUnit
|
|
}
|
|
return nil
|
|
}
|