Module utf8x 

UTF-8 encoding for TeX characters.

TeX characters are code points 0–0x10FFFF, including surrogates, which LuaTeX encodes like any other value (a superset of standard UTF-8, as in WTF-8). Strings of TeX characters are therefore kept as byte vectors.

Functions

chars

Decodes a whole byte string into characters.

decode

Decodes the character starting at bytes[i], returning it and its length. Malformed sequences decode as their first byte (length 1), which is how LuaTeX treats invalid input bytes.

encode

The encoding of a single character.

len

Number of bytes in the encoding of c.

push

Appends the encoding of c to out.

single_char

If bytes encodes exactly one character, returns it.