From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libstdc++-v3/include/debug/safe_iterator.tcc | 106 +++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 libstdc++-v3/include/debug/safe_iterator.tcc (limited to 'libstdc++-v3/include/debug/safe_iterator.tcc') diff --git a/libstdc++-v3/include/debug/safe_iterator.tcc b/libstdc++-v3/include/debug/safe_iterator.tcc new file mode 100644 index 000000000..942640c65 --- /dev/null +++ b/libstdc++-v3/include/debug/safe_iterator.tcc @@ -0,0 +1,106 @@ +// Debugging iterator implementation (out of line) -*- C++ -*- + +// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010 +// 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 +// . + +/** @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 + bool + _Safe_iterator<_Iterator, _Sequence>:: + _M_can_advance(const difference_type& __n) const + { + typedef typename _Sequence::const_iterator const_debug_iterator; + typedef typename const_debug_iterator::iterator_type const_iterator; + + if (this->_M_singular()) + return false; + if (__n == 0) + return true; + if (__n < 0) + { + const_iterator __begin = _M_get_sequence()->_M_base().begin(); + std::pair __dist = + this->_M_get_distance(__begin, base()); + bool __ok = ((__dist.second == __dp_exact && __dist.first >= -__n) + || (__dist.second != __dp_exact && __dist.first > 0)); + return __ok; + } + else + { + const_iterator __end = _M_get_sequence()->_M_base().end(); + std::pair __dist = + this->_M_get_distance(base(), __end); + bool __ok = ((__dist.second == __dp_exact && __dist.first >= __n) + || (__dist.second != __dp_exact && __dist.first > 0)); + return __ok; + } + } + + template + template + bool + _Safe_iterator<_Iterator, _Sequence>:: + _M_valid_range(const _Safe_iterator<_Other, _Sequence>& __rhs) const + { + if (!_M_can_compare(__rhs)) + return false; + + /* Determine if we can order the iterators without the help of + the container */ + std::pair __dist = + this->_M_get_distance(base(), __rhs.base()); + switch (__dist.second) { + case __dp_equality: + if (__dist.first == 0) + return true; + break; + + case __dp_sign: + case __dp_exact: + return __dist.first >= 0; + } + + /* We can only test for equality, but check if one of the + iterators is at an extreme. */ + /* Optim for classic [begin, it) or [it, end) ranges, limit checks + * when code is valid. */ + if (_M_is_begin() || __rhs._M_is_end()) + return true; + if (_M_is_end() || __rhs._M_is_begin()) + return false; + + // Assume that this is a valid range; we can't check anything else + return true; + } +} // namespace __gnu_debug + +#endif + -- cgit v1.2.3