Function lua_getlocal

third-party/lua-5.3.5/src/ldebug.c:171–192

LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
  const char *name;
  lua_lock(L);
  swapextra(L);
  if (ar == NULL) {  /* information about non-active function? */
    if (!isLfunction(L->top - 1))  /* not a Lua function? */
      name = NULL;
    else  /* consider live variables at function start (parameters) */
      name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
  }
  else {  /* active function; get information through 'ar' */
    StkId pos = NULL;  /* to avoid warnings */
    name = findlocal(L, ar->i_ci, n, &pos);
    if (name) {
      setobj2s(L, L->top, pos);
      api_incr_top(L);
    }
  }
  swapextra(L);
  lua_unlock(L);
  return name;
}


LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {