mirror of
https://github.com/rocky-linux/peridot.git
synced 2024-11-30 16:46:27 +00:00
72 lines
1.6 KiB
Go
72 lines
1.6 KiB
Go
// Copyright 2015 go-swagger maintainers
|
|
//
|
|
// 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 validate
|
|
|
|
import (
|
|
re "regexp"
|
|
"sync"
|
|
"sync/atomic"
|
|
)
|
|
|
|
// Cache for compiled regular expressions
|
|
var (
|
|
cacheMutex = &sync.Mutex{}
|
|
reDict = atomic.Value{} // map[string]*re.Regexp
|
|
)
|
|
|
|
func compileRegexp(pattern string) (*re.Regexp, error) {
|
|
if cache, ok := reDict.Load().(map[string]*re.Regexp); ok {
|
|
if r := cache[pattern]; r != nil {
|
|
return r, nil
|
|
}
|
|
}
|
|
|
|
r, err := re.Compile(pattern)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
cacheRegexp(r)
|
|
return r, nil
|
|
}
|
|
|
|
func mustCompileRegexp(pattern string) *re.Regexp {
|
|
if cache, ok := reDict.Load().(map[string]*re.Regexp); ok {
|
|
if r := cache[pattern]; r != nil {
|
|
return r
|
|
}
|
|
}
|
|
|
|
r := re.MustCompile(pattern)
|
|
cacheRegexp(r)
|
|
return r
|
|
}
|
|
|
|
func cacheRegexp(r *re.Regexp) {
|
|
cacheMutex.Lock()
|
|
defer cacheMutex.Unlock()
|
|
|
|
if cache, ok := reDict.Load().(map[string]*re.Regexp); !ok || cache[r.String()] == nil {
|
|
newCache := map[string]*re.Regexp{
|
|
r.String(): r,
|
|
}
|
|
|
|
for k, v := range cache {
|
|
newCache[k] = v
|
|
}
|
|
|
|
reDict.Store(newCache)
|
|
}
|
|
}
|