.github
alerting
client
config
core
docs
example
jsonpath
k8s
metric
pattern
security
static
vendor
cloud.google.com
github.com
beorn7
cespare
davecgh
gogo
golang
google
googleapis
imdario
json-iterator
matttproud
modern-go
prometheus
client_golang
client_model
common
procfs
internal
fs
util
parse.go
readfile.go
sysreadfile.go
sysreadfile_compat.go
valueparser.go
.gitignore
.golangci.yml
CONTRIBUTING.md
LICENSE
MAINTAINERS.md
Makefile
Makefile.common
NOTICE
README.md
arp.go
buddyinfo.go
cpuinfo.go
cpuinfo_arm.go
cpuinfo_arm64.go
cpuinfo_default.go
cpuinfo_mips.go
cpuinfo_mips64.go
cpuinfo_mips64le.go
cpuinfo_mipsle.go
cpuinfo_ppc64.go
cpuinfo_ppc64le.go
cpuinfo_s390x.go
crypto.go
doc.go
fixtures.ttar
fs.go
fscache.go
go.mod
go.sum
ipvs.go
kernel_random.go
loadavg.go
mdstat.go
meminfo.go
mountinfo.go
mountstats.go
net_conntrackstat.go
net_dev.go
net_sockstat.go
net_softnet.go
net_udp.go
net_unix.go
proc.go
proc_cgroup.go
proc_environ.go
proc_fdinfo.go
proc_io.go
proc_limits.go
proc_maps.go
proc_ns.go
proc_psi.go
proc_smaps.go
proc_stat.go
proc_status.go
schedstat.go
stat.go
swaps.go
ttar
vm.go
xfrm.go
zoneinfo.go
spf13
golang.org
google.golang.org
gopkg.in
k8s.io
sigs.k8s.io
modules.txt
watchdog
.dockerignore
.gitattributes
.gitignore
Dockerfile
LICENSE.md
README.md
config.yaml
go.mod
go.sum
gzip.go
main.go
92 lines
2.4 KiB
Go
92 lines
2.4 KiB
Go
// Copyright 2019 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 (
|
|
"strconv"
|
|
)
|
|
|
|
// TODO(mdlayher): util packages are an anti-pattern and this should be moved
|
|
// somewhere else that is more focused in the future.
|
|
|
|
// A ValueParser enables parsing a single string into a variety of data types
|
|
// in a concise and safe way. The Err method must be invoked after invoking
|
|
// any other methods to ensure a value was successfully parsed.
|
|
type ValueParser struct {
|
|
v string
|
|
err error
|
|
}
|
|
|
|
// NewValueParser creates a ValueParser using the input string.
|
|
func NewValueParser(v string) *ValueParser {
|
|
return &ValueParser{v: v}
|
|
}
|
|
|
|
// Int interprets the underlying value as an int and returns that value.
|
|
func (vp *ValueParser) Int() int { return int(vp.int64()) }
|
|
|
|
// PInt64 interprets the underlying value as an int64 and returns a pointer to
|
|
// that value.
|
|
func (vp *ValueParser) PInt64() *int64 {
|
|
if vp.err != nil {
|
|
return nil
|
|
}
|
|
|
|
v := vp.int64()
|
|
return &v
|
|
}
|
|
|
|
// int64 interprets the underlying value as an int64 and returns that value.
|
|
// TODO: export if/when necessary.
|
|
func (vp *ValueParser) int64() int64 {
|
|
if vp.err != nil {
|
|
return 0
|
|
}
|
|
|
|
// A base value of zero makes ParseInt infer the correct base using the
|
|
// string's prefix, if any.
|
|
const base = 0
|
|
v, err := strconv.ParseInt(vp.v, base, 64)
|
|
if err != nil {
|
|
vp.err = err
|
|
return 0
|
|
}
|
|
|
|
return v
|
|
}
|
|
|
|
// PUInt64 interprets the underlying value as an uint64 and returns a pointer to
|
|
// that value.
|
|
func (vp *ValueParser) PUInt64() *uint64 {
|
|
if vp.err != nil {
|
|
return nil
|
|
}
|
|
|
|
// A base value of zero makes ParseInt infer the correct base using the
|
|
// string's prefix, if any.
|
|
const base = 0
|
|
v, err := strconv.ParseUint(vp.v, base, 64)
|
|
if err != nil {
|
|
vp.err = err
|
|
return nil
|
|
}
|
|
|
|
return &v
|
|
}
|
|
|
|
// Err returns the last error, if any, encountered by the ValueParser.
|
|
func (vp *ValueParser) Err() error {
|
|
return vp.err
|
|
}
|