Check the validity of a byte stream ot be interpreted as UTF8.

checkUTF8 check whether a given raw vector can be used as a valid string encoded in UTF8.

Usage

checkUTF8(what, quiet = FALSE,  charlen = FALSE, min.char = 1L)

what: raw vector with the payload
quiet: logical, if TRUE then the function will not fail but report success/failure via its result, otherwise failures are considered errors.
charlen: logical, if TRUE then the function returns the length of the longest byte sequence representing a character in the file.
min.char: integer, any bytes below this value are considered control chacters and reported as errors. The default value of 1L guards against strings including NULs.

If charlen=FALSE: TRUE on success, FALSE if the payload is invalid and quite=TRUE.

If charlen=TRUE: positive integer corresponding to the longest encoded sequence on success, negative integer on failure.

Simon Urbanek