mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-30 07:32:45 +00:00
72 lines
2.1 KiB
Go
72 lines
2.1 KiB
Go
/*
|
|
* Copyright 2022 ByteDance Inc.
|
|
*
|
|
* 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 utf8
|
|
|
|
import (
|
|
`github.com/bytedance/sonic/internal/rt`
|
|
`github.com/bytedance/sonic/internal/native/types`
|
|
`github.com/bytedance/sonic/internal/native`
|
|
)
|
|
|
|
// CorrectWith corrects the invalid utf8 byte with repl string.
|
|
func CorrectWith(dst []byte, src []byte, repl string) []byte {
|
|
sstr := rt.Mem2Str(src)
|
|
sidx := 0
|
|
|
|
/* state machine records the invalid postions */
|
|
m := types.NewStateMachine()
|
|
m.Sp = 0 // invalid utf8 numbers
|
|
|
|
for sidx < len(sstr) {
|
|
scur := sidx
|
|
ecode := native.ValidateUTF8(&sstr, &sidx, m)
|
|
|
|
if m.Sp != 0 {
|
|
if m.Sp > len(sstr) {
|
|
panic("numbers of invalid utf8 exceed the string len!")
|
|
}
|
|
}
|
|
|
|
for i := 0; i < m.Sp; i++ {
|
|
ipos := m.Vt[i] // invalid utf8 position
|
|
dst = append(dst, sstr[scur:ipos]...)
|
|
dst = append(dst, repl...)
|
|
scur = m.Vt[i] + 1
|
|
}
|
|
/* append the remained valid utf8 bytes */
|
|
dst = append(dst, sstr[scur:sidx]...)
|
|
|
|
/* not enough space, reset and continue */
|
|
if ecode != 0 {
|
|
m.Sp = 0
|
|
}
|
|
}
|
|
|
|
types.FreeStateMachine(m)
|
|
return dst
|
|
}
|
|
|
|
// Validate is a simd-accelereated drop-in replacement for the standard library's utf8.Valid.
|
|
func Validate(src []byte) bool {
|
|
return ValidateString(rt.Mem2Str(src))
|
|
}
|
|
|
|
// ValidateString as Validate, but for string.
|
|
func ValidateString(src string) bool {
|
|
return native.ValidateUTF8Fast(&src) == 0
|
|
}
|