// 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} // ParsePInt64s parses a slice of strings into a slice of int64 pointers.func ParsePInt64s(ss []string) ([]*int64, error) {	us := make([]*int64, 0, len(ss))	for _, s := range ss {		u, err := strconv.ParseInt(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)} // ParseBool parses a string into a boolean pointer.func ParseBool(b string) *bool {	var truth bool	switch b {	case "enabled":		truth = true	case "disabled":		truth = false	default:		return nil	}	return &truth}