| // Copyright 2018 The Prometheus 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 util |
| |
| import ( |
| "io/ioutil" |
| "strconv" |
| "strings" |
| ) |
| |
| // ParseUint32s parses a slice of strings into a slice of uint32s. |
| func ParseUint32s(ss []string) ([]uint32, error) { |
| us := make([]uint32, 0, len(ss)) |
| for _, s := range ss { |
| u, err := strconv.ParseUint(s, 10, 32) |
| if err != nil { |
| return nil, err |
| } |
| |
| us = append(us, uint32(u)) |
| } |
| |
| return us, nil |
| } |
| |
| // ParseUint64s parses a slice of strings into a slice of uint64s. |
| func ParseUint64s(ss []string) ([]uint64, error) { |
| us := make([]uint64, 0, len(ss)) |
| for _, s := range ss { |
| u, err := strconv.ParseUint(s, 10, 64) |
| if err != nil { |
| return nil, err |
| } |
| |
| us = append(us, u) |
| } |
| |
| return us, nil |
| } |
| |
| // ReadUintFromFile reads a file and attempts to parse a uint64 from it. |
| func ReadUintFromFile(path string) (uint64, error) { |
| data, err := ioutil.ReadFile(path) |
| if err != nil { |
| return 0, err |
| } |
| return strconv.ParseUint(strings.TrimSpace(string(data)), 10, 64) |
| } |