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.

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

Arguments

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.

Value

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.

Author

Simon Urbanek