| // Copyright 2015 The etcd Authors |
| // |
| // 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 types |
| |
| import "strconv" |
| |
| // ID represents a generic identifier which is canonically |
| // stored as a uint64 but is typically represented as a |
| // base-16 string for input/output |
| type ID uint64 |
| |
| func (i ID) String() string { |
| return strconv.FormatUint(uint64(i), 16) |
| } |
| |
| // IDFromString attempts to create an ID from a base-16 string. |
| func IDFromString(s string) (ID, error) { |
| i, err := strconv.ParseUint(s, 16, 64) |
| return ID(i), err |
| } |
| |
| // IDSlice implements the sort interface |
| type IDSlice []ID |
| |
| func (p IDSlice) Len() int { return len(p) } |
| func (p IDSlice) Less(i, j int) bool { return uint64(p[i]) < uint64(p[j]) } |
| func (p IDSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] } |