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I’m engaged on my first huge venture and I’ve determined to combine Lua with my C++ framework. Everything’s labored out thus far, however the one approach I’ve managed to move the SDL_GetKeyboardState(NULL) array to Lua is by constructing a Lua desk manually.

void passKeyboard(const Uint8* keyboard){
    std::map<std::string,std::string> kmap;
    kmap.clear();
    kmap["UP"]=toString(keyboard[SDL_GetScancodeFromKey(SDLK_UP)]);
    kmap["DOWN"]=toString(keyboard[SDL_GetScancodeFromKey(SDLK_DOWN)]);
    kmap["LEFT"]=toString(keyboard[SDL_GetScancodeFromKey(SDLK_LEFT)]);
    kmap["RIGHT"]=toString(keyboard[SDL_GetScancodeFromKey(SDLK_RIGHT)]);
    ...
    vbind_SetTable("keyboard",kmap);
}

Now, the code works and in all fairness quick for my functions, nevertheless it’s undeniably ugly. I even really feel soiled it. Is there any approach I might to this extra elegantly?

For reference, vbind.h:

void vbind_SetTable(const std::string &identify,std::map<std::string,std::string> &t){
    lua_newtable(L);
    for(std::map<std::string,std::string>::iterator it=t.start();it!=t.finish();it++){
        lua_pushstring(L,it->first.c_str());
        std::string worth=it->second;
        const char* p=worth.c_str();
        char* finish;
        lengthy t=strtol(worth.c_str(),&finish,10);
        if(p!=finish&&errno!=ERANGE){
            lua_pushnumber(L,t);
        }
        else{
            lua_pushstring(L,worth.c_str());
        }
        lua_settable(L,-3);
    }
    lua_setglobal(L,identify.c_str());
}

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