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<div class="title">safe_iterator.tcc</div> </div>
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<a href="a01019.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Debugging iterator implementation (out of line) -*- C++ -*-</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010</span>
<a name="l00004"></a>00004 <span class="comment">// Free Software Foundation, Inc.</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span>
<a name="l00007"></a>00007 <span class="comment">// software; you can redistribute it and/or modify it under the</span>
<a name="l00008"></a>00008 <span class="comment">// terms of the GNU General Public License as published by the</span>
<a name="l00009"></a>00009 <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span>
<a name="l00010"></a>00010 <span class="comment">// any later version.</span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="comment">// This library is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00015"></a>00015 <span class="comment">// GNU General Public License for more details.</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span>
<a name="l00018"></a>00018 <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span>
<a name="l00019"></a>00019 <span class="comment">// 3.1, as published by the Free Software Foundation.</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="comment">// You should have received a copy of the GNU General Public License and</span>
<a name="l00022"></a>00022 <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span>
<a name="l00023"></a>00023 <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span>
<a name="l00024"></a>00024 <span class="comment">// <http://www.gnu.org/licenses/>.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">/** @file debug/safe_iterator.tcc</span>
<a name="l00027"></a>00027 <span class="comment"> * This file is a GNU debug extension to the Standard C++ Library.</span>
<a name="l00028"></a>00028 <span class="comment"> */</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC 1</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <span class="keyword">namespace </span>__gnu_debug
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <span class="keyword">template</span><<span class="keyword">typename</span> _Iterator, <span class="keyword">typename</span> _Sequence>
<a name="l00036"></a>00036 <span class="keywordtype">bool</span>
<a name="l00037"></a>00037 _Safe_iterator<_Iterator, _Sequence>::
<a name="l00038"></a>00038 _M_can_advance(<span class="keyword">const</span> difference_type& __n)<span class="keyword"> const</span>
<a name="l00039"></a>00039 <span class="keyword"> </span>{
<a name="l00040"></a>00040 <span class="keyword">typedef</span> <span class="keyword">typename</span> _Sequence::const_iterator const_debug_iterator;
<a name="l00041"></a>00041 <span class="keyword">typedef</span> <span class="keyword">typename</span> const_debug_iterator::iterator_type const_iterator;
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keywordflow">if</span> (this->_M_singular())
<a name="l00044"></a>00044 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00045"></a>00045 <span class="keywordflow">if</span> (__n == 0)
<a name="l00046"></a>00046 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00047"></a>00047 <span class="keywordflow">if</span> (__n < 0)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 const_iterator __begin = _M_get_sequence()->_M_base().begin();
<a name="l00050"></a>00050 <a class="code" href="a00263.html" title="Struct holding two objects of arbitrary type.">std::pair<difference_type, _Distance_precision></a> __dist =
<a name="l00051"></a>00051 this->_M_get_distance(__begin, base());
<a name="l00052"></a>00052 <span class="keywordtype">bool</span> __ok = ((__dist.<a class="code" href="a00263.html#a91179413226db12e66346d3673b7835f" title="first is a copy of the first object">second</a> == __dp_exact && __dist.<a class="code" href="a00263.html#a198b03cffc037835dc1dc01c926ce251" title="second_type is the second bound type">first</a> >= -__n)
<a name="l00053"></a>00053 || (__dist.<a class="code" href="a00263.html#a91179413226db12e66346d3673b7835f" title="first is a copy of the first object">second</a> != __dp_exact && __dist.<a class="code" href="a00263.html#a198b03cffc037835dc1dc01c926ce251" title="second_type is the second bound type">first</a> > 0));
<a name="l00054"></a>00054 <span class="keywordflow">return</span> __ok;
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056 <span class="keywordflow">else</span>
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 const_iterator __end = _M_get_sequence()->_M_base().end();
<a name="l00059"></a>00059 <a class="code" href="a00263.html" title="Struct holding two objects of arbitrary type.">std::pair<difference_type, _Distance_precision></a> __dist =
<a name="l00060"></a>00060 this->_M_get_distance(base(), __end);
<a name="l00061"></a>00061 <span class="keywordtype">bool</span> __ok = ((__dist.<a class="code" href="a00263.html#a91179413226db12e66346d3673b7835f" title="first is a copy of the first object">second</a> == __dp_exact && __dist.<a class="code" href="a00263.html#a198b03cffc037835dc1dc01c926ce251" title="second_type is the second bound type">first</a> >= __n)
<a name="l00062"></a>00062 || (__dist.<a class="code" href="a00263.html#a91179413226db12e66346d3673b7835f" title="first is a copy of the first object">second</a> != __dp_exact && __dist.<a class="code" href="a00263.html#a198b03cffc037835dc1dc01c926ce251" title="second_type is the second bound type">first</a> > 0));
<a name="l00063"></a>00063 <span class="keywordflow">return</span> __ok;
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="keyword">template</span><<span class="keyword">typename</span> _Iterator, <span class="keyword">typename</span> _Sequence>
<a name="l00068"></a>00068 <span class="keyword">template</span><<span class="keyword">typename</span> _Other>
<a name="l00069"></a>00069 <span class="keywordtype">bool</span>
<a name="l00070"></a>00070 _Safe_iterator<_Iterator, _Sequence>::
<a name="l00071"></a>00071 _M_valid_range(<span class="keyword">const</span> _Safe_iterator<_Other, _Sequence>& __rhs)<span class="keyword"> const</span>
<a name="l00072"></a>00072 <span class="keyword"> </span>{
<a name="l00073"></a>00073 <span class="keywordflow">if</span> (!_M_can_compare(__rhs))
<a name="l00074"></a>00074 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="comment">/* Determine if we can order the iterators without the help of</span>
<a name="l00077"></a>00077 <span class="comment"> the container */</span>
<a name="l00078"></a>00078 <a class="code" href="a00263.html" title="Struct holding two objects of arbitrary type.">std::pair<difference_type, _Distance_precision></a> __dist =
<a name="l00079"></a>00079 this->_M_get_distance(base(), __rhs.base());
<a name="l00080"></a>00080 <span class="keywordflow">switch</span> (__dist.<a class="code" href="a00263.html#a91179413226db12e66346d3673b7835f" title="first is a copy of the first object">second</a>) {
<a name="l00081"></a>00081 <span class="keywordflow">case</span> __dp_equality:
<a name="l00082"></a>00082 <span class="keywordflow">if</span> (__dist.<a class="code" href="a00263.html#a198b03cffc037835dc1dc01c926ce251" title="second_type is the second bound type">first</a> == 0)
<a name="l00083"></a>00083 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00084"></a>00084 <span class="keywordflow">break</span>;
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keywordflow">case</span> __dp_sign:
<a name="l00087"></a>00087 <span class="keywordflow">case</span> __dp_exact:
<a name="l00088"></a>00088 <span class="keywordflow">return</span> __dist.<a class="code" href="a00263.html#a198b03cffc037835dc1dc01c926ce251" title="second_type is the second bound type">first</a> >= 0;
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="comment">/* We can only test for equality, but check if one of the</span>
<a name="l00092"></a>00092 <span class="comment"> iterators is at an extreme. */</span>
<a name="l00093"></a>00093 <span class="comment">/* Optim for classic [begin, it) or [it, end) ranges, limit checks</span>
<a name="l00094"></a>00094 <span class="comment"> * when code is valid. */</span>
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (_M_is_begin() || __rhs._M_is_end())
<a name="l00096"></a>00096 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00097"></a>00097 <span class="keywordflow">if</span> (_M_is_end() || __rhs._M_is_begin())
<a name="l00098"></a>00098 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">// Assume that this is a valid range; we can't check anything else</span>
<a name="l00101"></a>00101 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103 } <span class="comment">// namespace __gnu_debug</span>
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="preprocessor">#endif</span>
<a name="l00106"></a>00106 <span class="preprocessor"></span>
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