| William Kurkian | ea86948 | 2019-04-09 15:16:11 -0400 | [diff] [blame] | 1 | // Copyright 2015 The etcd Authors |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package types |
| 16 | |
| 17 | import "strconv" |
| 18 | |
| 19 | // ID represents a generic identifier which is canonically |
| 20 | // stored as a uint64 but is typically represented as a |
| 21 | // base-16 string for input/output |
| 22 | type ID uint64 |
| 23 | |
| 24 | func (i ID) String() string { |
| 25 | return strconv.FormatUint(uint64(i), 16) |
| 26 | } |
| 27 | |
| 28 | // IDFromString attempts to create an ID from a base-16 string. |
| 29 | func IDFromString(s string) (ID, error) { |
| 30 | i, err := strconv.ParseUint(s, 16, 64) |
| 31 | return ID(i), err |
| 32 | } |
| 33 | |
| 34 | // IDSlice implements the sort interface |
| 35 | type IDSlice []ID |
| 36 | |
| 37 | func (p IDSlice) Len() int { return len(p) } |
| 38 | func (p IDSlice) Less(i, j int) bool { return uint64(p[i]) < uint64(p[j]) } |
| 39 | func (p IDSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] } |