Re: C API to check if string is valid varible name
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- Subject: Re: C API to check if string is valid varible name
- From: Tomas Mudrunka <mudrunka@...>
- Date: 2023年3月27日 17:34:35 +0200
Dne 2023年03月24日 14:29, Roberto Ierusalimschy napsal:
> For instance?
I have lua embedded in system where users can define table of
variables and
then write expressions to process them. However i think it would be
reasonable to have some sanity checks in place, so i don't have to
explain
why formulas using variable called "TIME-MAX" are not working :-) and
stuff
like that...
Up to reserved words, the Lua pattern "^[%a_][%w_]*$" should do the
job.
-- Roberto
So just to give happy end to this thread, thanks for your sugestion.
I've ended using this C code, probably will simplify it later:
int lua_string_match(lua_State *LUA, const char *string, const char
*pattern) {
int ret;
lua_getglobal(LUA, "string");
lua_getfield(LUA, -1, "match");
lua_pushstring(LUA, string);
lua_pushstring(LUA, pattern);
lua_call(LUA, 2, 1); //2args, 1ret
ret = lua_toboolean(LUA, -1);
lua_pop(LUA, lua_gettop(LUA));
return ret;
}
int lua_check_variable_name(lua_State *LUA, const char *string) {
return lua_string_match(LUA, string, "^[%a_][%w_]*$"); //TODO: Prepsat
do lua souboru???
}
--
S pozdravem
Best regards
Tomáš Mudruňka - SPOJE.NET s.r.o.