Re: Lua C-API - create two tables parallel

[Andrew Gierth <andrew@...>]

>>>>> "Ervin" == Ervin Hegedüs <airween@gmail.com> writes:

 Ervin> As you can see I iterate through the list twice, because I don't
 Ervin> know how can I handle in two tables parallel.

I don't see why you think this is a problem - you can easily have
multiple tables on the stack.

untested:

    lua_newtable(L);  // lineerrors
    lua_newtable(L);  // lineerrorspos
    l.lineerrpool.currptr = l.lineerrpool.pool;
    for (int c = 0; c < l.lineerrcnt; ++c)
    {
        read_mylog_err(&l.lineerrpool, &logerr);
        // stack:  lineerrors \ lineerrorspos
        lua_pushstring(L, logerr.errmsg);
        // stack:  lineerrors \ lineerrorspos \ errmsg
        lua_seti(L, -3, c);
        lua_newtable(L);
        // stack:  lineerrors \ lineerrorspos \ subtable
        lua_pushinteger(L, *logerr.startpos);
        lua_seti(L, -2, 1);
        lua_pushinteger(L, *logerr.endpos);
        lua_seti(L, -2, 1);
        // stack:  lineerrors \ lineerrorspos \ subtable
        lua_seti(L, -2, c);
    }
    // stack:  lineerrors \ lineerrorspos
    lua_setfield(L, maintable_idx, "lineerrorspos");
    lua_setfield(L, maintable_idx, "lineerrors");

If you're stuck on Lua 5.1, then you can easily define lua_seti yourself
(in terms of lua_settable and lua_insert), or rewrite as

        lua_pushinteger(L, c);
        lua_pushstring(L, logerr.errmsg);
        // stack: lineerrors \ lineerrorspos \ c \ errmsg
        lua_settable(L, -4);

etc.

-- 
Andrew.