mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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7f4fb34182
It is better developing vmctl tool in VictoriaMetrics repository, so it could be released together with the rest of vmutils tools such as vmalert, vmagent, vmbackup, vmrestore and vmauth.
92 lines
2.4 KiB
Go
92 lines
2.4 KiB
Go
// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package util
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import (
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"strconv"
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)
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// TODO(mdlayher): util packages are an anti-pattern and this should be moved
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// somewhere else that is more focused in the future.
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// A ValueParser enables parsing a single string into a variety of data types
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// in a concise and safe way. The Err method must be invoked after invoking
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// any other methods to ensure a value was successfully parsed.
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type ValueParser struct {
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v string
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err error
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}
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// NewValueParser creates a ValueParser using the input string.
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func NewValueParser(v string) *ValueParser {
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return &ValueParser{v: v}
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}
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// Int interprets the underlying value as an int and returns that value.
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func (vp *ValueParser) Int() int { return int(vp.int64()) }
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// PInt64 interprets the underlying value as an int64 and returns a pointer to
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// that value.
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func (vp *ValueParser) PInt64() *int64 {
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if vp.err != nil {
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return nil
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}
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v := vp.int64()
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return &v
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}
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// int64 interprets the underlying value as an int64 and returns that value.
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// TODO: export if/when necessary.
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func (vp *ValueParser) int64() int64 {
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if vp.err != nil {
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return 0
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}
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// A base value of zero makes ParseInt infer the correct base using the
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// string's prefix, if any.
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const base = 0
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v, err := strconv.ParseInt(vp.v, base, 64)
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if err != nil {
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vp.err = err
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return 0
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}
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return v
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}
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// PUInt64 interprets the underlying value as an uint64 and returns a pointer to
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// that value.
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func (vp *ValueParser) PUInt64() *uint64 {
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if vp.err != nil {
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return nil
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}
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// A base value of zero makes ParseInt infer the correct base using the
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// string's prefix, if any.
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const base = 0
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v, err := strconv.ParseUint(vp.v, base, 64)
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if err != nil {
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vp.err = err
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return nil
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}
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return &v
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}
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// Err returns the last error, if any, encountered by the ValueParser.
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func (vp *ValueParser) Err() error {
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return vp.err
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}
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