stri_enc_isutf8 {stringi} | R Documentation

## Check If a Data Stream Is Possibly in UTF-8

### Description

The function checks whether given sequences of bytes forms a proper UTF-8 string.

### Usage

    stri_enc_isutf8(str)

### Arguments

`str` | character vector, a raw vector, or a list of `raw` vectors

### Details

Negative answer means that a string is surely not valid UTF-8. Positive result does not mean that we should be absolutely sure. E.g. `(c4,85)` properly represents ("Polish 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, have ASCII as their subsets (note that `stri_enc_isascii` => `stri_enc_isutf8`).

However, the longer the sequence, the bigger the possibility that the result is indeed in UTF-8 – this is because not all sequences of bytes are valid UTF-8.

This function is independent of the way R marks encodings in character strings (see Encoding and stringi-encoding).

### Value

Returns a logical vector. Its i-th element indicates whether the i-th string corresponds to a valid UTF-8 byte sequence.

### See Also

Other encoding_detection: `stri_enc_detect2`, `stri_enc_detect`, `stri_enc_isascii`, `stri_enc_isutf16be`, `stringi-encoding`

### Examples

    stri_enc_isutf8(letters[1:3])
    stri_enc_isutf8("\u0105\u0104")
    stri_enc_isutf8("\u1234\u0222")

[Package stringi version 1.1.1 Index]