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// 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