Don Newton | 98fd881 | 2019-09-23 15:15:02 -0400 | [diff] [blame^] | 1 | /* |
| 2 | Copyright 2017 the original author or authors. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package openflow |
| 18 | |
| 19 | import ( |
| 20 | "fmt" |
| 21 | "strings" |
| 22 | "sync" |
| 23 | ) |
| 24 | |
| 25 | var mu sync.Mutex |
| 26 | var xid uint32 = 1 |
| 27 | |
| 28 | func GetXid() uint32 { |
| 29 | mu.Lock() |
| 30 | defer mu.Unlock() |
| 31 | xid++ |
| 32 | return xid |
| 33 | } |
| 34 | func PadString(value string, padSize int) string { |
| 35 | size := len(value) |
| 36 | nullsNeeded := padSize - size |
| 37 | null := fmt.Sprintf("%c", '\000') |
| 38 | padded := strings.Repeat(null, nullsNeeded) |
| 39 | return fmt.Sprintf("%s%s", value, padded) |
| 40 | } |