<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>libstdc++: streambuf.tcc Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript">
$(document).ready(initResizable);
</script>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.7.4 -->
<div id="top">
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">libstdc++</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
initNavTree('a01072.html','');
</script>
<div id="doc-content">
<div class="header">
<div class="headertitle">
<div class="title">streambuf.tcc</div> </div>
</div>
<div class="contents">
<a href="a01072.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Stream buffer classes -*- C++ -*-</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,</span>
<a name="l00004"></a>00004 <span class="comment">// 2006, 2007, 2008, 2009, 2010, 2011 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 bits/streambuf.tcc</span>
<a name="l00027"></a>00027 <span class="comment"> * This is an internal header file, included by other library headers.</span>
<a name="l00028"></a>00028 <span class="comment"> * Do not attempt to use it directly. @headername{streambuf}</span>
<a name="l00029"></a>00029 <span class="comment"> */</span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00032"></a>00032 <span class="comment">// ISO C++ 14882: 27.5 Stream buffers</span>
<a name="l00033"></a>00033 <span class="comment">//</span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="preprocessor">#ifndef _STREAMBUF_TCC</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">#define _STREAMBUF_TCC 1</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span>
<a name="l00038"></a>00038 <span class="preprocessor">#pragma GCC system_header</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 <span class="keyword">namespace </span>std _GLIBCXX_VISIBILITY(default)
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 _GLIBCXX_BEGIN_NAMESPACE_VERSION
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="keyword">template</span><<span class="keyword">typename</span> _CharT, <span class="keyword">typename</span> _Traits>
<a name="l00045"></a>00045 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a>
<a name="l00046"></a>00046 <a class="code" href="a00252.html#a5eaa7fbc16e49b8105d6387fcbbfad61" title="Multiple character extraction.">basic_streambuf<_CharT, _Traits>::</a>
<a name="l00047"></a><a class="code" href="a00252.html#a5eaa7fbc16e49b8105d6387fcbbfad61">00047</a> <a class="code" href="a00252.html#a5eaa7fbc16e49b8105d6387fcbbfad61" title="Multiple character extraction."> xsgetn</a>(<a class="code" href="a00252.html#a38ad1721a50a96c7d37d51a3f858a0cf">char_type</a>* __s, <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __n)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __ret = 0;
<a name="l00050"></a>00050 <span class="keywordflow">while</span> (__ret < __n)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 <span class="keyword">const</span> <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __buf_len = this->egptr() - this->gptr();
<a name="l00053"></a>00053 <span class="keywordflow">if</span> (__buf_len)
<a name="l00054"></a>00054 {
<a name="l00055"></a>00055 <span class="keyword">const</span> <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __remaining = __n - __ret;
<a name="l00056"></a>00056 <span class="keyword">const</span> <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __len = <a class="code" href="a01184.html#ga49f0c87cb0e1bf950f5c2d49aa106573" title="This does what you think it does.">std::min</a>(__buf_len, __remaining);
<a name="l00057"></a>00057 traits_type::copy(__s, this->gptr(), __len);
<a name="l00058"></a>00058 __ret += __len;
<a name="l00059"></a>00059 __s += __len;
<a name="l00060"></a>00060 this->__safe_gbump(__len);
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordflow">if</span> (__ret < __n)
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 <span class="keyword">const</span> <a class="code" href="a00252.html#a1c1565d5b66e703de4d9a8aef4957a8b">int_type</a> __c = this->uflow();
<a name="l00066"></a>00066 <span class="keywordflow">if</span> (!traits_type::eq_int_type(__c, traits_type::eof()))
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 traits_type::assign(*__s++, traits_type::to_char_type(__c));
<a name="l00069"></a>00069 ++__ret;
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071 <span class="keywordflow">else</span>
<a name="l00072"></a>00072 <span class="keywordflow">break</span>;
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075 <span class="keywordflow">return</span> __ret;
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keyword">template</span><<span class="keyword">typename</span> _CharT, <span class="keyword">typename</span> _Traits>
<a name="l00079"></a>00079 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a>
<a name="l00080"></a>00080 <a class="code" href="a00252.html#a23e843afc42e2875d1f2fc945821499a" title="Multiple character insertion.">basic_streambuf<_CharT, _Traits>::</a>
<a name="l00081"></a><a class="code" href="a00252.html#a23e843afc42e2875d1f2fc945821499a">00081</a> <a class="code" href="a00252.html#a23e843afc42e2875d1f2fc945821499a" title="Multiple character insertion."> xsputn</a>(<span class="keyword">const</span> <a class="code" href="a00252.html#a38ad1721a50a96c7d37d51a3f858a0cf">char_type</a>* __s, <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __n)
<a name="l00082"></a>00082 {
<a name="l00083"></a>00083 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __ret = 0;
<a name="l00084"></a>00084 <span class="keywordflow">while</span> (__ret < __n)
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 <span class="keyword">const</span> <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __buf_len = this->epptr() - this->pptr();
<a name="l00087"></a>00087 <span class="keywordflow">if</span> (__buf_len)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 <span class="keyword">const</span> <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __remaining = __n - __ret;
<a name="l00090"></a>00090 <span class="keyword">const</span> <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __len = <a class="code" href="a01184.html#ga49f0c87cb0e1bf950f5c2d49aa106573" title="This does what you think it does.">std::min</a>(__buf_len, __remaining);
<a name="l00091"></a>00091 traits_type::copy(this->pptr(), __s, __len);
<a name="l00092"></a>00092 __ret += __len;
<a name="l00093"></a>00093 __s += __len;
<a name="l00094"></a>00094 this->__safe_pbump(__len);
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordflow">if</span> (__ret < __n)
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 <a class="code" href="a00252.html#a1c1565d5b66e703de4d9a8aef4957a8b">int_type</a> __c = this->overflow(traits_type::to_int_type(*__s));
<a name="l00100"></a>00100 <span class="keywordflow">if</span> (!traits_type::eq_int_type(__c, traits_type::eof()))
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 ++__ret;
<a name="l00103"></a>00103 ++__s;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105 <span class="keywordflow">else</span>
<a name="l00106"></a>00106 <span class="keywordflow">break</span>;
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109 <span class="keywordflow">return</span> __ret;
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="comment">// Conceivably, this could be used to implement buffer-to-buffer</span>
<a name="l00113"></a>00113 <span class="comment">// copies, if this was ever desired in an un-ambiguous way by the</span>
<a name="l00114"></a>00114 <span class="comment">// standard.</span>
<a name="l00115"></a>00115 <span class="keyword">template</span><<span class="keyword">typename</span> _CharT, <span class="keyword">typename</span> _Traits>
<a name="l00116"></a>00116 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a>
<a name="l00117"></a>00117 __copy_streambufs_eof(<a class="code" href="a00252.html" title="The actual work of input and output (interface).This is a base class. Derived stream buffers each con...">basic_streambuf<_CharT, _Traits></a>* __sbin,
<a name="l00118"></a>00118 <a class="code" href="a00252.html" title="The actual work of input and output (interface).This is a base class. Derived stream buffers each con...">basic_streambuf<_CharT, _Traits></a>* __sbout,
<a name="l00119"></a>00119 <span class="keywordtype">bool</span>& __ineof)
<a name="l00120"></a>00120 {
<a name="l00121"></a>00121 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a> __ret = 0;
<a name="l00122"></a>00122 __ineof = <span class="keyword">true</span>;
<a name="l00123"></a>00123 <span class="keyword">typename</span> _Traits::int_type __c = __sbin-><a class="code" href="a00252.html#ac773fb2c87cf938fb6eb89c987f8e04e" title="Getting the next character.">sgetc</a>();
<a name="l00124"></a>00124 <span class="keywordflow">while</span> (!_Traits::eq_int_type(__c, _Traits::eof()))
<a name="l00125"></a>00125 {
<a name="l00126"></a>00126 __c = __sbout-><a class="code" href="a00252.html#af3504dac5b4cd940dbce97ddc5ed0c25" title="Entry point for all single-character output functions.">sputc</a>(_Traits::to_char_type(__c));
<a name="l00127"></a>00127 <span class="keywordflow">if</span> (_Traits::eq_int_type(__c, _Traits::eof()))
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 __ineof = <span class="keyword">false</span>;
<a name="l00130"></a>00130 <span class="keywordflow">break</span>;
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132 ++__ret;
<a name="l00133"></a>00133 __c = __sbin-><a class="code" href="a00252.html#a6d281db46069df3043b566f10e5397b2" title="Getting the next character.">snextc</a>();
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135 <span class="keywordflow">return</span> __ret;
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keyword">template</span><<span class="keyword">typename</span> _CharT, <span class="keyword">typename</span> _Traits>
<a name="l00139"></a>00139 <span class="keyword">inline</span> <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a>
<a name="l00140"></a>00140 __copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin,
<a name="l00141"></a>00141 basic_streambuf<_CharT, _Traits>* __sbout)
<a name="l00142"></a>00142 {
<a name="l00143"></a>00143 <span class="keywordtype">bool</span> __ineof;
<a name="l00144"></a>00144 <span class="keywordflow">return</span> __copy_streambufs_eof(__sbin, __sbout, __ineof);
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="comment">// Inhibit implicit instantiations for required instantiations,</span>
<a name="l00148"></a>00148 <span class="comment">// which are defined via explicit instantiations elsewhere.</span>
<a name="l00149"></a>00149 <span class="preprocessor">#if _GLIBCXX_EXTERN_TEMPLATE</span>
<a name="l00150"></a>00150 <span class="preprocessor"></span> <span class="keyword">extern</span> <span class="keyword">template</span> <span class="keyword">class </span>basic_streambuf<char>;
<a name="l00151"></a>00151 <span class="keyword">extern</span> <span class="keyword">template</span>
<a name="l00152"></a>00152 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a>
<a name="l00153"></a>00153 __copy_streambufs(basic_streambuf<char>*,
<a name="l00154"></a>00154 basic_streambuf<char>*);
<a name="l00155"></a>00155 <span class="keyword">extern</span> <span class="keyword">template</span>
<a name="l00156"></a>00156 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a>
<a name="l00157"></a>00157 __copy_streambufs_eof(basic_streambuf<char>*,
<a name="l00158"></a>00158 basic_streambuf<char>*, <span class="keywordtype">bool</span>&);
<a name="l00159"></a>00159
<a name="l00160"></a>00160 <span class="preprocessor">#ifdef _GLIBCXX_USE_WCHAR_T</span>
<a name="l00161"></a>00161 <span class="preprocessor"></span> <span class="keyword">extern</span> <span class="keyword">template</span> <span class="keyword">class </span>basic_streambuf<wchar_t>;
<a name="l00162"></a>00162 <span class="keyword">extern</span> <span class="keyword">template</span>
<a name="l00163"></a>00163 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a>
<a name="l00164"></a>00164 __copy_streambufs(basic_streambuf<wchar_t>*,
<a name="l00165"></a>00165 basic_streambuf<wchar_t>*);
<a name="l00166"></a>00166 <span class="keyword">extern</span> <span class="keyword">template</span>
<a name="l00167"></a>00167 <a class="code" href="a01137.html#a05eef5582eb5de62b76db4916f7adb84" title="Integral type for I/O operation counts and buffer sizes.">streamsize</a>
<a name="l00168"></a>00168 __copy_streambufs_eof(basic_streambuf<wchar_t>*,
<a name="l00169"></a>00169 basic_streambuf<wchar_t>*, <span class="keywordtype">bool</span>&);
<a name="l00170"></a>00170 <span class="preprocessor">#endif</span>
<a name="l00171"></a>00171 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00172"></a>00172 <span class="preprocessor"></span>
<a name="l00173"></a>00173 _GLIBCXX_END_NAMESPACE_VERSION
<a name="l00174"></a>00174 } <span class="comment">// namespace std</span>
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <span class="preprocessor">#endif</span>
</pre></div></div>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="navelem"><a class="el" href="a01072.html">streambuf.tcc</a> </li>
<li class="footer">Generated by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4 </li>
</ul>
</div>
</body>
</html>
