1// Copyright (C) 1994-2017 Free Software Foundation, Inc.
2//
3// This file is part of GCC.
4//
5// GCC is free software; you can redistribute it and/or modify
6// it under the terms of the GNU General Public License as published by
7// the Free Software Foundation; either version 3, or (at your option)
8// any later version.
9
10// GCC is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14
15// Under Section 7 of GPL version 3, you are granted additional
16// permissions described in the GCC Runtime Library Exception, version
17// 3.1, as published by the Free Software Foundation.
18
19// You should have received a copy of the GNU General Public License and
20// a copy of the GCC Runtime Library Exception along with this program;
21// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
22// <http://www.gnu.org/licenses/>.
23
24#include "tinfo.h"
25
26namespace __cxxabiv1 {
27
28__class_type_info::
29~__class_type_info ()
30{}
31
32bool __class_type_info::
33__do_catch (const type_info *thr_type,
34 void **thr_obj,
35 unsigned outer) const
36{
37 if (*this == *thr_type)
38 return true;
39 if (outer >= 4)
40 // Neither `A' nor `A *'.
41 return false;
42 return thr_type->__do_upcast (this, thr_obj);
43}
44
45bool __class_type_info::
46__do_upcast (const __class_type_info *dst_type,
47 void **obj_ptr) const
48{
49 __upcast_result result (__vmi_class_type_info::__flags_unknown_mask);
50
51 __do_upcast (dst_type, *obj_ptr, result);
52 if (!contained_public_p (result.part2dst))
53 return false;
54 *obj_ptr = const_cast <void *> (result.dst_ptr);
55 return true;
56}
57
58__class_type_info::__sub_kind __class_type_info::
59__do_find_public_src (ptrdiff_t,
60 const void *obj_ptr,
61 const __class_type_info *,
62 const void *src_ptr) const
63{
64 if (src_ptr == obj_ptr)
65 // Must be our type, as the pointers match.
66 return __contained_public;
67 return __not_contained;
68}
69
70bool __class_type_info::
71__do_dyncast (ptrdiff_t,
72 __sub_kind access_path,
73 const __class_type_info *dst_type,
74 const void *obj_ptr,
75 const __class_type_info *src_type,
76 const void *src_ptr,
77 __dyncast_result &__restrict result) const
78{
79 if (obj_ptr == src_ptr && *this == *src_type)
80 {
81 // The src object we started from. Indicate how we are accessible from
82 // the most derived object.
83 result.whole2src = access_path;
84 return false;
85 }
86 if (*this == *dst_type)
87 {
88 result.dst_ptr = obj_ptr;
89 result.whole2dst = access_path;
90 result.dst2src = __not_contained;
91 return false;
92 }
93 return false;
94}
95
96bool __class_type_info::
97__do_upcast (const __class_type_info *dst, const void *obj,
98 __upcast_result &__restrict result) const
99{
100 if (*this == *dst)
101 {
102 result.dst_ptr = obj;
103 result.base_type = nonvirtual_base_type;
104 result.part2dst = __contained_public;
105 return true;
106 }
107 return false;
108}
109
110}
111