mirror of
https://github.com/ergochat/ergo.git
synced 2024-12-23 11:12:44 +01:00
26 lines
562 B
Go
26 lines
562 B
Go
// Copyright (c) 2021 Shivaram Lingamneni
|
|
// Released under the MIT License
|
|
|
|
package ircutils
|
|
|
|
import (
|
|
"unicode/utf8"
|
|
)
|
|
|
|
// truncate a message, taking care not to make valid UTF8 into invalid UTF8
|
|
func TruncateUTF8Safe(message string, byteLimit int) (result string) {
|
|
if len(message) <= byteLimit {
|
|
return message
|
|
}
|
|
message = message[:byteLimit]
|
|
for i := 0; i < (utf8.UTFMax - 1); i++ {
|
|
r, n := utf8.DecodeLastRuneInString(message)
|
|
if r == utf8.RuneError && n <= 1 {
|
|
message = message[:len(message)-1]
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
return message
|
|
}
|