You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
790 B
44 lines
790 B
// Package intern interns strings.
|
|
// Interning is best effort only.
|
|
// Interned strings may be removed automatically
|
|
// at any time without notification.
|
|
// All functions may be called concurrently
|
|
// with themselves and each other.
|
|
package intern
|
|
|
|
import "sync"
|
|
|
|
var (
|
|
pool sync.Pool = sync.Pool{
|
|
New: func() interface{} {
|
|
return make(map[string]string)
|
|
},
|
|
}
|
|
)
|
|
|
|
// String returns s, interned.
|
|
func String(s string) string {
|
|
m := pool.Get().(map[string]string)
|
|
c, ok := m[s]
|
|
if ok {
|
|
pool.Put(m)
|
|
return c
|
|
}
|
|
m[s] = s
|
|
pool.Put(m)
|
|
return s
|
|
}
|
|
|
|
// Bytes returns b converted to a string, interned.
|
|
func Bytes(b []byte) string {
|
|
m := pool.Get().(map[string]string)
|
|
c, ok := m[string(b)]
|
|
if ok {
|
|
pool.Put(m)
|
|
return c
|
|
}
|
|
s := string(b)
|
|
m[s] = s
|
|
pool.Put(m)
|
|
return s
|
|
}
|
|
|