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