stri_enc_isutf8: Check If a Data Stream Is Possibly in UTF-8
The function checks whether given sequences of bytes forms a proper UTF-8 string.
character vector, a raw vector, or a list of
FALSE means that a string is certainly not valid UTF-8. However, false positives are possible. For instance,
(c4,85) represents (‘a with ogonek’) in UTF-8 as well as (‘A umlaut’, ‘Ellipsis’) in WINDOWS-1250. Also note that UTF-8, as well as most 8-bit encodings, extend ASCII (note that
stri_enc_isascii implies that
However, the longer the sequence, the greater the possibility that the result is indeed in UTF-8 – this is because not all sequences of bytes are valid UTF-8.
Returns a logical vector. Its i-th element indicates whether the i-th string corresponds to a valid UTF-8 byte sequence.
The official online manual of stringi at https://stringi.gagolewski.com/
Gagolewski M., stringi: Fast and portable character string processing in R, Journal of Statistical Software 103(2), 2022, 1-59, doi: 10.18637/jss.v103.i02
stri_enc_isutf8(letters[1:3]) ##  TRUE TRUE TRUE stri_enc_isutf8('\u0105\u0104') ##  TRUE stri_enc_isutf8('\u1234\u0222') ##  TRUE