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

   1 // Copyright (C) 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2007
   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 2, 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 // You should have received a copy of the GNU General Public License
  17 // along with GCC; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  19 // Boston, MA 02110-1301, USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline enums from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 #include "tinfo.h"
  31
  32 namespace __cxxabiv1 {
  33
  34 __si_class_type_info::
  35 ~__si_class_type_info ()
  36 {}
  37
  38 __class_type_info::__sub_kind __si_class_type_info::
  39 __do_find_public_src (ptrdiff_t src2dst,
  40                       const void *obj_ptr,
  41                       const __class_type_info *src_type,
  42                       const void *src_ptr) const
  43 {
  44   if (src_ptr == obj_ptr && *this == *src_type)
  45     return __contained_public;
  46   return __base_type->__do_find_public_src (src2dst, obj_ptr, src_type, src_ptr);
  47 }
  48
  49 bool __si_class_type_info::
  50 __do_dyncast (ptrdiff_t src2dst,
  51               __sub_kind access_path,
  52               const __class_type_info *dst_type,
  53               const void *obj_ptr,
  54               const __class_type_info *src_type,
  55               const void *src_ptr,
  56               __dyncast_result &__restrict result) const
  57 {
  58   if (*this == *dst_type)
  59     {
  60       result.dst_ptr = obj_ptr;
  61       result.whole2dst = access_path;
  62       if (src2dst >= 0)
  63         result.dst2src = adjust_pointer <void> (obj_ptr, src2dst) == src_ptr
  64               ? __contained_public : __not_contained;
  65       else if (src2dst == -2)
  66         result.dst2src = __not_contained;
  67       return false;
  68     }
  69   if (obj_ptr == src_ptr && *this == *src_type)
  70     {
  71       // The src object we started from. Indicate how we are accessible from
  72       // the most derived object.
  73       result.whole2src = access_path;
  74       return false;
  75     }
  76   return __base_type->__do_dyncast (src2dst, access_path, dst_type, obj_ptr,
  77                              src_type, src_ptr, result);
  78 }
  79
  80 bool __si_class_type_info::
  81 __do_upcast (const __class_type_info *dst, const void *obj_ptr,
  82              __upcast_result &__restrict result) const
  83 {
  84   if (__class_type_info::__do_upcast (dst, obj_ptr, result))
  85     return true;
  86
  87   return __base_type->__do_upcast (dst, obj_ptr, result);
  88 }
  89
  90 }