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vsphere-influxdb-go/vendor/github.com/vmware/govmomi/units/size.go
2017-10-25 20:52:40 +00:00

110 lines
2.2 KiB
Go

/*
Copyright (c) 2015 VMware, Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package units
import (
"errors"
"fmt"
"regexp"
"strconv"
)
type ByteSize int64
const (
_ = iota
KB = 1 << (10 * iota)
MB
GB
TB
PB
EB
)
func (b ByteSize) String() string {
switch {
case b >= EB:
return fmt.Sprintf("%.1fEB", float32(b)/EB)
case b >= PB:
return fmt.Sprintf("%.1fPB", float32(b)/PB)
case b >= TB:
return fmt.Sprintf("%.1fTB", float32(b)/TB)
case b >= GB:
return fmt.Sprintf("%.1fGB", float32(b)/GB)
case b >= MB:
return fmt.Sprintf("%.1fMB", float32(b)/MB)
case b >= KB:
return fmt.Sprintf("%.1fKB", float32(b)/KB)
}
return fmt.Sprintf("%dB", b)
}
type FileSize int64
func (b FileSize) String() string {
switch {
case b >= EB:
return fmt.Sprintf("%.1fE", float32(b)/EB)
case b >= PB:
return fmt.Sprintf("%.1fP", float32(b)/PB)
case b >= TB:
return fmt.Sprintf("%.1fT", float32(b)/TB)
case b >= GB:
return fmt.Sprintf("%.1fG", float32(b)/GB)
case b >= MB:
return fmt.Sprintf("%.1fM", float32(b)/MB)
case b >= KB:
return fmt.Sprintf("%.1fK", float32(b)/KB)
}
return fmt.Sprintf("%d", b)
}
var bytesRegexp = regexp.MustCompile(`^(?i)(\d+)([BKMGTPE]?)(ib|b)?$`)
func (b *ByteSize) Set(s string) error {
m := bytesRegexp.FindStringSubmatch(s)
if len(m) == 0 {
return errors.New("invalid byte value")
}
i, err := strconv.ParseInt(m[1], 10, 64)
if err != nil {
return err
}
*b = ByteSize(i)
switch m[2] {
case "B", "b", "":
case "K", "k":
*b *= ByteSize(KB)
case "M", "m":
*b *= ByteSize(MB)
case "G", "g":
*b *= ByteSize(GB)
case "T", "t":
*b *= ByteSize(TB)
case "P", "p":
*b *= ByteSize(PB)
case "E", "e":
*b *= ByteSize(EB)
default:
return errors.New("invalid byte suffix")
}
return nil
}