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Diffstat (limited to 'libstdc++/libsupc++/tinfo2.cc')
| -rw-r--r-- | libstdc++/libsupc++/tinfo2.cc | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/libstdc++/libsupc++/tinfo2.cc b/libstdc++/libsupc++/tinfo2.cc new file mode 100644 index 0000000..2f5a2cd --- /dev/null +++ b/libstdc++/libsupc++/tinfo2.cc @@ -0,0 +1,167 @@ +// Methods for type_info for -*- C++ -*- Run Time Type Identification. + +// Copyright (C) 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2002 +// Free Software Foundation +// +// This file is part of GCC. +// +// GCC is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 2, or (at your option) +// any later version. + +// GCC is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with GCC; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02110-1301, USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +#include <cstddef> +#include "tinfo.h" +#include "new" // for placement new + +// We can't rely on having stdlib.h if we're freestanding. +extern "C" void abort (); + +using std::type_info; + +#if !__GXX_MERGED_TYPEINFO_NAMES + +bool +type_info::before (const type_info &arg) const +{ + return __builtin_strcmp (name (), arg.name ()) < 0; +} + +#endif + +#include <cxxabi.h> + +namespace __cxxabiv1 { + +using namespace std; + +// This has special meaning to the compiler, and will cause it +// to emit the type_info structures for the fundamental types which are +// mandated to exist in the runtime. +__fundamental_type_info:: +~__fundamental_type_info () +{} + +__array_type_info:: +~__array_type_info () +{} + +__function_type_info:: +~__function_type_info () +{} + +__enum_type_info:: +~__enum_type_info () +{} + +__pbase_type_info:: +~__pbase_type_info () +{} + +__pointer_type_info:: +~__pointer_type_info () +{} + +__pointer_to_member_type_info:: +~__pointer_to_member_type_info () +{} + +bool __pointer_type_info:: +__is_pointer_p () const +{ + return true; +} + +bool __function_type_info:: +__is_function_p () const +{ + return true; +} + +bool __pbase_type_info:: +__do_catch (const type_info *thr_type, + void **thr_obj, + unsigned outer) const +{ + if (*this == *thr_type) + return true; // same type + if (typeid (*this) != typeid (*thr_type)) + return false; // not both same kind of pointers + + if (!(outer & 1)) + // We're not the same and our outer pointers are not all const qualified + // Therefore there must at least be a qualification conversion involved + // But for that to be valid, our outer pointers must be const qualified. + return false; + + const __pbase_type_info *thrown_type = + static_cast <const __pbase_type_info *> (thr_type); + + if (thrown_type->__flags & ~__flags) + // We're less qualified. + return false; + + if (!(__flags & __const_mask)) + outer &= ~1; + + return __pointer_catch (thrown_type, thr_obj, outer); +} + +inline bool __pbase_type_info:: +__pointer_catch (const __pbase_type_info *thrown_type, + void **thr_obj, + unsigned outer) const +{ + return __pointee->__do_catch (thrown_type->__pointee, thr_obj, outer + 2); +} + +bool __pointer_type_info:: +__pointer_catch (const __pbase_type_info *thrown_type, + void **thr_obj, + unsigned outer) const +{ + if (outer < 2 && *__pointee == typeid (void)) + { + // conversion to void + return !thrown_type->__pointee->__is_function_p (); + } + + return __pbase_type_info::__pointer_catch (thrown_type, thr_obj, outer); +} + +bool __pointer_to_member_type_info:: +__pointer_catch (const __pbase_type_info *thr_type, + void **thr_obj, + unsigned outer) const +{ + // This static cast is always valid, as our caller will have determined that + // thr_type is really a __pointer_to_member_type_info. + const __pointer_to_member_type_info *thrown_type = + static_cast <const __pointer_to_member_type_info *> (thr_type); + + if (*__context != *thrown_type->__context) + return false; // not pointers to member of same class + + return __pbase_type_info::__pointer_catch (thrown_type, thr_obj, outer); +} + +} // namespace std |
