vendorify
diff --git a/go/vendor/github.com/go-openapi/validate/rexp.go b/go/vendor/github.com/go-openapi/validate/rexp.go
new file mode 100644
index 0000000..5a08243
--- /dev/null
+++ b/go/vendor/github.com/go-openapi/validate/rexp.go
@@ -0,0 +1,71 @@
+// 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)
+ }
+}