| // Copyright 2022 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 flags |
| |
| import ( |
| "flag" |
| "strconv" |
| ) |
| |
| type uint32Value uint32 |
| |
| // NewUint32Value creates an uint32 instance with the provided value. |
| func NewUint32Value(v uint32) *uint32Value { |
| val := new(uint32Value) |
| *val = uint32Value(v) |
| return val |
| } |
| |
| // Set parses a command line uint32 value. |
| // Implements "flag.Value" interface. |
| func (i *uint32Value) Set(s string) error { |
| v, err := strconv.ParseUint(s, 0, 32) |
| *i = uint32Value(v) |
| return err |
| } |
| |
| func (i *uint32Value) String() string { return strconv.FormatUint(uint64(*i), 10) } |
| |
| // Uint32FromFlag return the uint32 value of a flag with the given name |
| func Uint32FromFlag(fs *flag.FlagSet, name string) uint32 { |
| val := *fs.Lookup(name).Value.(*uint32Value) |
| return uint32(val) |
| } |