mirror of git://gcc.gnu.org/git/gcc.git
96 lines
2.9 KiB
C++
96 lines
2.9 KiB
C++
// Debugging iterator implementation (out of line) -*- C++ -*-
|
|
|
|
// Copyright (C) 2003-2016 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library 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 3, or (at your option)
|
|
// any later version.
|
|
|
|
// This library 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.
|
|
|
|
// Under Section 7 of GPL version 3, you are granted additional
|
|
// permissions described in the GCC Runtime Library Exception, version
|
|
// 3.1, as published by the Free Software Foundation.
|
|
|
|
// You should have received a copy of the GNU General Public License and
|
|
// a copy of the GCC Runtime Library Exception along with this program;
|
|
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
/** @file debug/safe_iterator.tcc
|
|
* This file is a GNU debug extension to the Standard C++ Library.
|
|
*/
|
|
|
|
#ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC
|
|
#define _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC 1
|
|
|
|
namespace __gnu_debug
|
|
{
|
|
template<typename _Iterator, typename _Sequence>
|
|
bool
|
|
_Safe_iterator<_Iterator, _Sequence>::
|
|
_M_can_advance(const difference_type& __n) const
|
|
{
|
|
if (this->_M_singular())
|
|
return false;
|
|
|
|
if (__n == 0)
|
|
return true;
|
|
|
|
if (__n < 0)
|
|
{
|
|
std::pair<difference_type, _Distance_precision> __dist =
|
|
__get_distance_from_begin(*this);
|
|
bool __ok = ((__dist.second == __dp_exact && __dist.first >= -__n)
|
|
|| (__dist.second != __dp_exact && __dist.first > 0));
|
|
return __ok;
|
|
}
|
|
else
|
|
{
|
|
std::pair<difference_type, _Distance_precision> __dist =
|
|
__get_distance_to_end(*this);
|
|
bool __ok = ((__dist.second == __dp_exact && __dist.first >= __n)
|
|
|| (__dist.second != __dp_exact && __dist.first > 0));
|
|
return __ok;
|
|
}
|
|
}
|
|
|
|
template<typename _Iterator, typename _Sequence>
|
|
bool
|
|
_Safe_iterator<_Iterator, _Sequence>::
|
|
_M_valid_range(const _Safe_iterator& __rhs,
|
|
std::pair<difference_type, _Distance_precision>& __dist,
|
|
bool __check_dereferenceable) const
|
|
{
|
|
if (!_M_can_compare(__rhs))
|
|
return false;
|
|
|
|
/* Determine iterators order */
|
|
__dist = __get_distance(*this, __rhs);
|
|
switch (__dist.second)
|
|
{
|
|
case __dp_equality:
|
|
if (__dist.first == 0)
|
|
return true;
|
|
break;
|
|
|
|
case __dp_sign:
|
|
case __dp_exact:
|
|
// If range is not empty first iterator must be dereferenceable.
|
|
if (__dist.first > 0)
|
|
return !__check_dereferenceable || _M_dereferenceable();
|
|
return __dist.first == 0;
|
|
}
|
|
|
|
// Assume that this is a valid range; we can't check anything else.
|
|
return true;
|
|
}
|
|
} // namespace __gnu_debug
|
|
|
|
#endif
|