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initialism_index.go
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/
initialism_index.go
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// 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 swag
import (
"sort"
"strings"
"sync"
)
var (
// commonInitialisms are common acronyms that are kept as whole uppercased words.
commonInitialisms *indexOfInitialisms
// initialisms is a slice of sorted initialisms
initialisms []string
// a copy of initialisms pre-baked as []rune
initialismsRunes [][]rune
initialismsUpperCased [][]rune
isInitialism func(string) bool
maxAllocMatches int
)
func init() {
// Taken from https://github.com/golang/lint/blob/3390df4df2787994aea98de825b964ac7944b817/lint.go#L732-L769
configuredInitialisms := map[string]bool{
"ACL": true,
"API": true,
"ASCII": true,
"CPU": true,
"CSS": true,
"DNS": true,
"EOF": true,
"GUID": true,
"HTML": true,
"HTTPS": true,
"HTTP": true,
"ID": true,
"IP": true,
"IPv4": true,
"IPv6": true,
"JSON": true,
"LHS": true,
"OAI": true,
"QPS": true,
"RAM": true,
"RHS": true,
"RPC": true,
"SLA": true,
"SMTP": true,
"SQL": true,
"SSH": true,
"TCP": true,
"TLS": true,
"TTL": true,
"UDP": true,
"UI": true,
"UID": true,
"UUID": true,
"URI": true,
"URL": true,
"UTF8": true,
"VM": true,
"XML": true,
"XMPP": true,
"XSRF": true,
"XSS": true,
}
// a thread-safe index of initialisms
commonInitialisms = newIndexOfInitialisms().load(configuredInitialisms)
initialisms = commonInitialisms.sorted()
initialismsRunes = asRunes(initialisms)
initialismsUpperCased = asUpperCased(initialisms)
maxAllocMatches = maxAllocHeuristic(initialismsRunes)
// a test function
isInitialism = commonInitialisms.isInitialism
}
func asRunes(in []string) [][]rune {
out := make([][]rune, len(in))
for i, initialism := range in {
out[i] = []rune(initialism)
}
return out
}
func asUpperCased(in []string) [][]rune {
out := make([][]rune, len(in))
for i, initialism := range in {
out[i] = []rune(upper(trim(initialism)))
}
return out
}
func maxAllocHeuristic(in [][]rune) int {
heuristic := make(map[rune]int)
for _, initialism := range in {
heuristic[initialism[0]]++
}
var maxAlloc int
for _, val := range heuristic {
if val > maxAlloc {
maxAlloc = val
}
}
return maxAlloc
}
// AddInitialisms add additional initialisms
func AddInitialisms(words ...string) {
for _, word := range words {
// commonInitialisms[upper(word)] = true
commonInitialisms.add(upper(word))
}
// sort again
initialisms = commonInitialisms.sorted()
initialismsRunes = asRunes(initialisms)
initialismsUpperCased = asUpperCased(initialisms)
}
// indexOfInitialisms is a thread-safe implementation of the sorted index of initialisms.
// Since go1.9, this may be implemented with sync.Map.
type indexOfInitialisms struct {
sortMutex *sync.Mutex
index *sync.Map
}
func newIndexOfInitialisms() *indexOfInitialisms {
return &indexOfInitialisms{
sortMutex: new(sync.Mutex),
index: new(sync.Map),
}
}
func (m *indexOfInitialisms) load(initial map[string]bool) *indexOfInitialisms {
m.sortMutex.Lock()
defer m.sortMutex.Unlock()
for k, v := range initial {
m.index.Store(k, v)
}
return m
}
func (m *indexOfInitialisms) isInitialism(key string) bool {
_, ok := m.index.Load(key)
return ok
}
func (m *indexOfInitialisms) add(key string) *indexOfInitialisms {
m.index.Store(key, true)
return m
}
func (m *indexOfInitialisms) sorted() (result []string) {
m.sortMutex.Lock()
defer m.sortMutex.Unlock()
m.index.Range(func(key, _ interface{}) bool {
k := key.(string)
result = append(result, k)
return true
})
sort.Sort(sort.Reverse(byInitialism(result)))
return
}
type byInitialism []string
func (s byInitialism) Len() int {
return len(s)
}
func (s byInitialism) Swap(i, j int) {
s[i], s[j] = s[j], s[i]
}
func (s byInitialism) Less(i, j int) bool {
if len(s[i]) != len(s[j]) {
return len(s[i]) < len(s[j])
}
return strings.Compare(s[i], s[j]) > 0
}