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<a href="a01644.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// Versatile string utility -*- C++ -*-</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;</div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">// Copyright (C) 2005-2013 Free Software Foundation, Inc.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">// This file is part of the GNU ISO C++ Library.  This library is free</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// software; you can redistribute it and/or modify it under the</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">// terms of the GNU General Public License as published by the</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">// any later version.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">// This library is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">// GNU General Public License for more details.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">// 3.1, as published by the Free Software Foundation.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment">// You should have received a copy of the GNU General Public License and</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment">// &lt;http://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="comment">/** @file ext/vstring_util.h</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment"> *  This is an internal header file, included by other library headers.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment"> *  Do not attempt to use it directly. @headername{ext/vstring.h}</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#ifndef _VSTRING_UTIL_H</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define _VSTRING_UTIL_H 1</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#pragma GCC system_header</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01643.html">ext/vstring_fwd.h</a>&gt;</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01164.html">debug/debug.h</a>&gt;</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01551.html">bits/stl_function.h</a>&gt;</span>  <span class="comment">// For less</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01255.html">bits/functexcept.h</a>&gt;</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01349.html">bits/localefwd.h</a>&gt;</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01402.html">bits/ostream_insert.h</a>&gt;</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01553.html">bits/stl_iterator.h</a>&gt;</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01392.html">ext/numeric_traits.h</a>&gt;</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01368.html">bits/move.h</a>&gt;</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a01457.html">bits/range_access.h</a>&gt;</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="keyword">namespace </span>__gnu_cxx _GLIBCXX_VISIBILITY(default)</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;{</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;_GLIBCXX_BEGIN_NAMESPACE_VERSION</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _CharT, <span class="keyword">typename</span> _Traits, <span class="keyword">typename</span> _Alloc&gt;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="keyword">struct </span>__vstring_utility</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    {</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> _Alloc::template rebind&lt;_CharT&gt;::other _CharT_alloc_type;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;      <span class="keyword">typedef</span> _Traits                       traits_type;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> _Traits::char_type           value_type;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> _CharT_alloc_type::size_type     size_type;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> _CharT_alloc_type::difference_type   difference_type;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> _CharT_alloc_type::pointer       pointer;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> _CharT_alloc_type::const_pointer     const_pointer;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;      <span class="comment">// For __sso_string.</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;      <span class="keyword">typedef</span> __gnu_cxx::</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;      __normal_iterator&lt;pointer, <a class="code" href="a00021.html">__gnu_cxx::</a></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<a class="code" href="a00021.html">			__versa_string</a>&lt;_CharT, _Traits, _Alloc,</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                       __sso_string_base&gt; &gt;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    __sso_iterator;</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;      <span class="keyword">typedef</span> __gnu_cxx::</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;      __normal_iterator&lt;const_pointer, <a class="code" href="a00021.html">__gnu_cxx::</a></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<a class="code" href="a00021.html">			__versa_string</a>&lt;_CharT, _Traits, _Alloc,</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;                       __sso_string_base&gt; &gt;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    __const_sso_iterator;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;      <span class="comment">// For __rc_string.</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;      <span class="keyword">typedef</span> __gnu_cxx::</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;      __normal_iterator&lt;pointer, <a class="code" href="a00021.html">__gnu_cxx::</a></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<a class="code" href="a00021.html">			__versa_string</a>&lt;_CharT, _Traits, _Alloc,</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;                       __rc_string_base&gt; &gt;</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    __rc_iterator;</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;      <span class="keyword">typedef</span> __gnu_cxx::</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;      __normal_iterator&lt;const_pointer, <a class="code" href="a00021.html">__gnu_cxx::</a></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<a class="code" href="a00021.html">			__versa_string</a>&lt;_CharT, _Traits, _Alloc,</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;                       __rc_string_base&gt; &gt;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    __const_rc_iterator;</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;      <span class="comment">// NB:  When the allocator is empty, deriving from it saves space</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;      <span class="comment">// (http://www.cantrip.org/emptyopt.html).</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Alloc1&gt;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    <span class="keyword">struct </span>_Alloc_hider</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    : <span class="keyword">public</span> _Alloc1</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    {</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;      _Alloc_hider(_CharT* __ptr)</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;      : _Alloc1(), _M_p(__ptr) { }</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;      _Alloc_hider(<span class="keyword">const</span> _Alloc1&amp; __a, _CharT* __ptr)</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;      : _Alloc1(__a), _M_p(__ptr) { }</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;      _CharT*  _M_p; <span class="comment">// The actual data.</span></div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    };</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;      <span class="comment">// When __n = 1 way faster than the general multichar</span></div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;      <span class="comment">// traits_type::copy/move/assign.</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;      _S_copy(_CharT* __d, <span class="keyword">const</span> _CharT* __s, size_type __n)</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;      {</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    <span class="keywordflow">if</span> (__n == 1)</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;      traits_type::assign(*__d, *__s);</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;      traits_type::copy(__d, __s, __n);</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;      }</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;      _S_move(_CharT* __d, <span class="keyword">const</span> _CharT* __s, size_type __n)</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;      {</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    <span class="keywordflow">if</span> (__n == 1)</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;      traits_type::assign(*__d, *__s);</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;      traits_type::move(__d, __s, __n);</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;      }</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;      _S_assign(_CharT* __d, size_type __n, _CharT __c)</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;      {</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    <span class="keywordflow">if</span> (__n == 1)</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;      traits_type::assign(*__d, __c);</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;      traits_type::assign(__d, __n, __c);</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;      }</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;      <span class="comment">// _S_copy_chars is a separate template to permit specialization</span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;      <span class="comment">// to optimize for the common case of pointers as iterators.</span></div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Iterator&gt;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    {</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;      <span class="keywordflow">for</span> (; __k1 != __k2; ++__k1, ++__p)</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;        traits_type::assign(*__p, *__k1); <span class="comment">// These types are off.</span></div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    }</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;      _S_copy_chars(_CharT* __p, __sso_iterator __k1, __sso_iterator __k2)</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;      { _S_copy_chars(__p, __k1.base(), __k2.base()); }</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;      _S_copy_chars(_CharT* __p, __const_sso_iterator __k1,</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;            __const_sso_iterator __k2)</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;      { _S_copy_chars(__p, __k1.base(), __k2.base()); }</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;      _S_copy_chars(_CharT* __p, __rc_iterator __k1, __rc_iterator __k2)</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;      { _S_copy_chars(__p, __k1.base(), __k2.base()); }</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;      _S_copy_chars(_CharT* __p, __const_rc_iterator __k1,</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;            __const_rc_iterator __k2)</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;      { _S_copy_chars(__p, __k1.base(), __k2.base()); }</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;      _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2)</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;      { _S_copy(__p, __k1, __k2 - __k1); }</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;      _S_copy_chars(_CharT* __p, <span class="keyword">const</span> _CharT* __k1, <span class="keyword">const</span> _CharT* __k2)</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;      { _S_copy(__p, __k1, __k2 - __k1); }</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;      <span class="keyword">static</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;      _S_compare(size_type __n1, size_type __n2)</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;      {</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="keyword">const</span> difference_type __d = difference_type(__n1 - __n2);</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="keywordflow">if</span> (__d &gt; __numeric_traits_integer&lt;int&gt;::__max)</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;      <span class="keywordflow">return</span> __numeric_traits_integer&lt;int&gt;::__max;</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (__d &lt; __numeric_traits_integer&lt;int&gt;::__min)</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;      <span class="keywordflow">return</span> __numeric_traits_integer&lt;int&gt;::__min;</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;      <span class="keywordflow">return</span> int(__d);</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;      }</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    };</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;_GLIBCXX_END_NAMESPACE_VERSION</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;} <span class="comment">// namespace</span></div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* _VSTRING_UTIL_H */</span><span class="preprocessor"></span></div>
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