mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-12-29 11:35:39 +00:00
110 lines
2.0 KiB
Go
110 lines
2.0 KiB
Go
package bytes
|
|
|
|
import (
|
|
"fmt"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
type (
|
|
// Bytes struct
|
|
Bytes struct{}
|
|
)
|
|
|
|
const (
|
|
_ = 1.0 << (10 * iota) // ignore first value by assigning to blank identifier
|
|
KB
|
|
MB
|
|
GB
|
|
TB
|
|
PB
|
|
EB
|
|
)
|
|
|
|
var (
|
|
pattern = regexp.MustCompile(`(?i)^(-?\d+(?:\.\d+)?)\s?([KMGTPE]B?|B?)$`)
|
|
global = New()
|
|
)
|
|
|
|
// New creates a Bytes instance.
|
|
func New() *Bytes {
|
|
return &Bytes{}
|
|
}
|
|
|
|
// Format formats bytes integer to human readable string.
|
|
// For example, 31323 bytes will return 30.59KB.
|
|
func (*Bytes) Format(b int64) string {
|
|
multiple := ""
|
|
value := float64(b)
|
|
|
|
switch {
|
|
case b >= EB:
|
|
value /= EB
|
|
multiple = "EB"
|
|
case b >= PB:
|
|
value /= PB
|
|
multiple = "PB"
|
|
case b >= TB:
|
|
value /= TB
|
|
multiple = "TB"
|
|
case b >= GB:
|
|
value /= GB
|
|
multiple = "GB"
|
|
case b >= MB:
|
|
value /= MB
|
|
multiple = "MB"
|
|
case b >= KB:
|
|
value /= KB
|
|
multiple = "KB"
|
|
case b == 0:
|
|
return "0"
|
|
default:
|
|
return strconv.FormatInt(b, 10) + "B"
|
|
}
|
|
|
|
return fmt.Sprintf("%.2f%s", value, multiple)
|
|
}
|
|
|
|
// Parse parses human readable bytes string to bytes integer.
|
|
// For example, 6GB (6G is also valid) will return 6442450944.
|
|
func (*Bytes) Parse(value string) (i int64, err error) {
|
|
parts := pattern.FindStringSubmatch(value)
|
|
if len(parts) < 3 {
|
|
return 0, fmt.Errorf("error parsing value=%s", value)
|
|
}
|
|
bytesString := parts[1]
|
|
multiple := strings.ToUpper(parts[2])
|
|
bytes, err := strconv.ParseFloat(bytesString, 64)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
switch multiple {
|
|
default:
|
|
return int64(bytes), nil
|
|
case "K", "KB":
|
|
return int64(bytes * KB), nil
|
|
case "M", "MB":
|
|
return int64(bytes * MB), nil
|
|
case "G", "GB":
|
|
return int64(bytes * GB), nil
|
|
case "T", "TB":
|
|
return int64(bytes * TB), nil
|
|
case "P", "PB":
|
|
return int64(bytes * PB), nil
|
|
case "E", "EB":
|
|
return int64(bytes * EB), nil
|
|
}
|
|
}
|
|
|
|
// Format wraps global Bytes's Format function.
|
|
func Format(b int64) string {
|
|
return global.Format(b)
|
|
}
|
|
|
|
// Parse wraps global Bytes's Parse function.
|
|
func Parse(val string) (int64, error) {
|
|
return global.Parse(val)
|
|
}
|