lua-utf8string

Simple UTF8 support in pure lua

Current Status

The module emulate the string capabilities

• string.byte
• string.char
• string.dump
• string.find
• string.format
• string.gmatch
• string.gsub
• string.len
• string.lower (*)
• string.match
• string.rep
• string.reverse
• string.sub
• string.upper (*)

(*) don't thread Unicode, only ascii upper/lower cases.

Sample of use

local u = require("utf8string")

local data = "àbcdéêèf"
local udata = u(data)

print(type(data), data)   -- the orignal
print(type(udata), udata) -- automatic convertion to string

print(#data)  -- is not the good number of printed characters on screen
print(#udata) -- is the number of printed characters on screen

print(udata:sub(4,5)) -- be able to use the sub() like a string

TODO

• See all other utf8 implementation
• Try to follow the lua5.3's utf8 API
• ...

License

My code is under MIT License