1 // Copyright (C) 1994-2018 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 26 namespace __cxxabiv1 { 27 28 __class_type_info:: 29 ~__class_type_info () 30 {} 31 32 bool __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 45 bool __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 70 bool __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 96 bool __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