libstdc++-v3/libsupc++/si_class_type_info.cc

   1 // Copyright (C) 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2007, 2009
   2 // Free Software Foundation
   3 //
   4 // This file is part of GCC.
   5 //
   6 // GCC is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // GCC is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 #include "tinfo.h"
  26
  27 namespace __cxxabiv1 {
  28
  29 __si_class_type_info::
  30 ~__si_class_type_info ()
  31 {}
  32
  33 __class_type_info::__sub_kind __si_class_type_info::
  34 __do_find_public_src (ptrdiff_t src2dst,
  35                       const void *obj_ptr,
  36                       const __class_type_info *src_type,
  37                       const void *src_ptr) const
  38 {
  39   if (src_ptr == obj_ptr && *this == *src_type)
  40     return __contained_public;
  41   return __base_type->__do_find_public_src (src2dst, obj_ptr, src_type, src_ptr);
  42 }
  43
  44 bool __si_class_type_info::
  45 __do_dyncast (ptrdiff_t src2dst,
  46               __sub_kind access_path,
  47               const __class_type_info *dst_type,
  48               const void *obj_ptr,
  49               const __class_type_info *src_type,
  50               const void *src_ptr,
  51               __dyncast_result &__restrict result) const
  52 {
  53   if (*this == *dst_type)
  54     {
  55       result.dst_ptr = obj_ptr;
  56       result.whole2dst = access_path;
  57       if (src2dst >= 0)
  58         result.dst2src = adjust_pointer <void> (obj_ptr, src2dst) == src_ptr
  59               ? __contained_public : __not_contained;
  60       else if (src2dst == -2)
  61         result.dst2src = __not_contained;
  62       return false;
  63     }
  64   if (obj_ptr == src_ptr && *this == *src_type)
  65     {
  66       // The src object we started from. Indicate how we are accessible from
  67       // the most derived object.
  68       result.whole2src = access_path;
  69       return false;
  70     }
  71   return __base_type->__do_dyncast (src2dst, access_path, dst_type, obj_ptr,
  72                              src_type, src_ptr, result);
  73 }
  74
  75 bool __si_class_type_info::
  76 __do_upcast (const __class_type_info *dst, const void *obj_ptr,
  77              __upcast_result &__restrict result) const
  78 {
  79   if (__class_type_info::__do_upcast (dst, obj_ptr, result))
  80     return true;
  81
  82   return __base_type->__do_upcast (dst, obj_ptr, result);
  83 }
  84
  85 }