utf8Conversion: Convert Integer Vectors to or from UTF-8-encoded Character Vectors

Description

Conversion of UTF-8 encoded character vectors to and from integer vectors.

utf8ToInt(x)
intToUtf8(x, multiple = FALSE)

object to be converted.

multiple

logical: should the conversion be to a single character string or multiple individual characters?

Unicode defines a name and a number of all of the glyphs it encompasses: the numbers are called code points: they run from 0 to 0x10FFFF. utf8ToInt converts a length-one character string encoded in UTF-8 to an integer vector of Unicode code points. As from R3.2.1 it checks validity of the input and returns NA if it is invalid.
intToUtf8 converts a numeric vector of Unicode code points either to a single character string or a character vector of single characters. (For a single character string 0 is silently omitted: otherwise 0 is mapped to "". Non-integral numeric values are truncated to integers.) The Encoding is declared as "UTF-8".
NA inputs are mapped to NA output.

These will work in any locale, including on platforms that do not otherwise support multi-byte character sets.

## will only display in some locales and fonts
intToUtf8(0x03B2L) # Greek beta
utf8ToInt("biu00dfchen")
utf8ToInt("xfaxb4xbfxbfx9f")

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