src/wrapper_base.cpp

   1 // Copyright (c) 2003 Daniel Wallin and Arvid Norberg
   2
   3 // Permission is hereby granted, free of charge, to any person obtaining a
   4 // copy of this software and associated documentation files (the "Software"),
   5 // to deal in the Software without restriction, including without limitation
   6 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   7 // and/or sell copies of the Software, and to permit persons to whom the
   8 // Software is furnished to do so, subject to the following conditions:
   9
  10 // The above copyright notice and this permission notice shall be included
  11 // in all copies or substantial portions of the Software.
  12
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
  14 // ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  15 // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  16 // PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
  17 // SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  18 // ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  19 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
  21 // OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 #include <luabind/config.hpp>
  24 #include <luabind/lua_include.hpp>
  25 #include <luabind/detail/object_rep.hpp>
  26 #include <luabind/detail/class_rep.hpp>
  27 #include <luabind/detail/stack_utils.hpp>
  28
  29 namespace luabind { namespace detail
  30 {
  31         LUABIND_API void do_call_member_selection(lua_State* L, char const* name)
  32         {
  33                 object_rep* obj = static_cast<object_rep*>(lua_touserdata(L, -1));
  34                 lua_pop(L, 1); // pop self
  35
  36                 obj->crep()->get_table(L); // push the crep table
  37                 lua_pushstring(L, name);
  38                 lua_gettable(L, -2);
  39                 lua_remove(L, -2); // remove the crep table
  40
  41                 {
  42                         if (!lua_iscfunction(L, -1)) return;
  43                         if (lua_getupvalue(L, -1, 3) == 0) return;
  44                         detail::stack_pop p(L, 1);
  45                         if (lua_touserdata(L, -1) != reinterpret_cast<void*>(0x1337)) return;
  46                 }
  47
  48                 // this (usually) means the function has not been
  49                 // overridden by lua, call the default implementation
  50                 lua_pop(L, 1);
  51                 obj->crep()->get_default_table(L); // push the crep table
  52                 lua_pushstring(L, name);
  53                 lua_gettable(L, -2);
  54                 assert(!lua_isnil(L, -1));
  55                 lua_remove(L, -2); // remove the crep table
  56         }
  57 }}