76   lua_CFunction f = (lua_CFunction)dlsym(lib, sym);  in ll_sym()  local
77   if (f == NULL) lua_pushstring(L, dlerror());  in ll_sym()
78   return f;  in ll_sym()
135   lua_CFunction f = (lua_CFunction)GetProcAddress((HINSTANCE)lib, sym);  in ll_sym()  local
136   if (f == NULL) pusherror(L);  in ll_sym()
137   return f;  in ll_sym()
300     lua_CFunction f = ll_sym(L, *reg, sym);  in ll_loadfunc()  local
301     if (f == NULL)  in ll_loadfunc()
303     lua_pushcfunction(L, f);  in ll_loadfunc()
333   FILE *f = fopen(filename, "r");  /* try to open file */  in readable()  local
334   if (f == NULL) return 0;  /* open failed */  in readable()
335   fclose(f);  in readable()