Re: Adding utf-8 handling support to Lua 5.1 in 2017

[Philipp Janda <siffiejoe@...>]

Am 13.04.2017 um 16:28 schröbte Luiz Henrique de Figueiredo:
> > I'd like to add support for dealing with utf-8 text in Lua 5.1 - for
> > functions such as string.gsub, string.len and etc. I'm aware 5.3 comes with
> > a utf8 library but I'm not considering breaking capability for the huge
> > ecosystem of code that's been developed for 5.1 for my application just yet.
> >
> > I know there's starwing/luautf8, are there any other options that I should
> > be considering?
>
> With the simple changes below, lutf8lib.c from 5.3 compiles fine in 5.1.
> I haven't tested it though.

It won't work because of `lua_pushfstring(L, "%U", ?)`. You can #define 
it to something reasonable, though. Compat-5.3[1] has lutf8lib.c 
backported to Lua 5.1, btw.

>     10d9
>     < #include "lprefix.h"
>     250,251c249,250
>     < LUAMOD_API int luaopen_utf8 (lua_State *L) {
>     <   luaL_newlib(L, funcs);
>     ---
>     > LUALIB_API int luaopen_utf8 (lua_State *L) {
>     >   luaL_register(L, "utf8", funcs);

Philipp

  [1]: https://github.com/keplerproject/lua-compat-5.3