<!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>Atlas-C++: Filter.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <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">Atlas-C++</div> </td> </tr> </tbody> </table> </div> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="files.html"><span>File List</span></a></li> </ul> </div> <div class="header"> <div class="headertitle"> <div class="title">Filter.h</div> </div> </div> <div class="contents"> <div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// This file may be redistributed and modified only under the terms of</span> <a name="l00002"></a>00002 <span class="comment">// the GNU Lesser General Public License (See COPYING for details).</span> <a name="l00003"></a>00003 <span class="comment">// Copyright (C) 2000-2001 Michael Day, Stefanus Du Toit</span> <a name="l00004"></a>00004 <a name="l00005"></a>00005 <span class="comment">// $Id$</span> <a name="l00006"></a>00006 <a name="l00007"></a>00007 <span class="preprocessor">#ifndef ATLAS_FILTER_H</span> <a name="l00008"></a>00008 <span class="preprocessor"></span><span class="preprocessor">#define ATLAS_FILTER_H</span> <a name="l00009"></a>00009 <span class="preprocessor"></span> <a name="l00010"></a>00010 <span class="preprocessor">#include <iostream></span> <a name="l00011"></a>00011 <span class="preprocessor">#include <string></span> <a name="l00012"></a>00012 <a name="l00013"></a>00013 <span class="keyword">namespace </span>Atlas { <a name="l00014"></a>00014 <a name="l00029"></a><a class="code" href="class_atlas_1_1_filter.html">00029</a> <span class="keyword">class </span><a class="code" href="class_atlas_1_1_filter.html" title="Atlas stream filter.">Filter</a> <a name="l00030"></a>00030 { <a name="l00031"></a>00031 <span class="keyword">public</span>: <a name="l00032"></a>00032 <a name="l00033"></a>00033 <a class="code" href="class_atlas_1_1_filter.html" title="Atlas stream filter.">Filter</a>(<a class="code" href="class_atlas_1_1_filter.html" title="Atlas stream filter.">Filter</a>* = 0); <a name="l00034"></a>00034 <span class="keyword">virtual</span> ~<a class="code" href="class_atlas_1_1_filter.html" title="Atlas stream filter.">Filter</a>(); <a name="l00035"></a>00035 <a name="l00036"></a>00036 <span class="keyword">virtual</span> <span class="keywordtype">void</span> begin() = 0; <a name="l00037"></a>00037 <span class="keyword">virtual</span> <span class="keywordtype">void</span> end() = 0; <a name="l00038"></a>00038 <a name="l00039"></a>00039 <span class="keyword">virtual</span> std::string encode(<span class="keyword">const</span> std::string&) = 0; <a name="l00040"></a>00040 <span class="keyword">virtual</span> std::string decode(<span class="keyword">const</span> std::string&) = 0; <a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="keyword">enum</span> Type <a name="l00043"></a>00043 { <a name="l00044"></a>00044 CHECKSUM, <a name="l00045"></a>00045 COMPRESSION, <a name="l00046"></a>00046 ENCRYPTION <a name="l00047"></a>00047 }; <a name="l00048"></a>00048 <a name="l00049"></a>00049 <span class="keyword">protected</span>: <a name="l00050"></a>00050 <a name="l00051"></a>00051 <a class="code" href="class_atlas_1_1_filter.html" title="Atlas stream filter.">Filter</a>* m_next; <a name="l00052"></a>00052 }; <a name="l00053"></a>00053 <a name="l00054"></a>00054 <span class="keyword">typedef</span> <span class="keywordtype">int</span> int_type; <a name="l00055"></a>00055 <a name="l00056"></a><a class="code" href="class_atlas_1_1filterbuf.html">00056</a> <span class="keyword">class </span><a class="code" href="class_atlas_1_1filterbuf.html">filterbuf</a> : <span class="keyword">public</span> std::streambuf { <a name="l00057"></a>00057 <a name="l00058"></a>00058 <span class="keyword">public</span>: <a name="l00059"></a>00059 <a name="l00060"></a>00060 <a class="code" href="class_atlas_1_1filterbuf.html">filterbuf</a>(std::streambuf& buffer, <a name="l00061"></a>00061 <a class="code" href="class_atlas_1_1_filter.html" title="Atlas stream filter.">Filter</a>& filter) <a name="l00062"></a>00062 : m_streamBuffer(buffer), m_filter(filter) <a name="l00063"></a>00063 { <a name="l00064"></a>00064 setp(m_outBuffer, m_outBuffer + (m_outBufferSize - 1)); <a name="l00065"></a>00065 setg(m_inBuffer + m_inPutback, m_inBuffer + m_inPutback, <a name="l00066"></a>00066 m_inBuffer + m_inPutback); <a name="l00067"></a>00067 } <a name="l00068"></a>00068 <a name="l00069"></a>00069 <span class="keyword">virtual</span> ~<a class="code" href="class_atlas_1_1filterbuf.html">filterbuf</a>(); <a name="l00070"></a>00070 <a name="l00071"></a>00071 <span class="keyword">protected</span>: <a name="l00072"></a>00072 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> m_outBufferSize = 10; <a name="l00073"></a>00073 <span class="keywordtype">char</span> m_outBuffer[m_outBufferSize]; <a name="l00074"></a>00074 <a name="l00075"></a>00075 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> m_inBufferSize = 10; <a name="l00076"></a>00076 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> m_inPutback = 4; <a name="l00077"></a>00077 <span class="keywordtype">char</span> m_inBuffer[m_inBufferSize]; <a name="l00078"></a>00078 <a name="l00079"></a>00079 <span class="keywordtype">int</span> flushOutBuffer() <a name="l00080"></a>00080 { <a name="l00081"></a>00081 <span class="keywordtype">int</span> num = pptr() - pbase(); <a name="l00082"></a>00082 std::string encoded = m_filter.encode(std::string(pbase(), pptr())); <a name="l00083"></a>00083 m_streamBuffer.sputn(encoded.c_str(), (long) encoded.size()); <a name="l00084"></a>00084 pbump(-num); <a name="l00085"></a>00085 <span class="keywordflow">return</span> num; <a name="l00086"></a>00086 } <a name="l00087"></a>00087 <a name="l00088"></a>00088 <span class="keyword">virtual</span> int_type overflow(int_type c); <a name="l00089"></a>00089 <span class="keyword">virtual</span> int_type underflow(); <a name="l00090"></a>00090 <span class="keyword">virtual</span> <span class="keywordtype">int</span> sync(); <a name="l00091"></a>00091 <a name="l00092"></a>00092 <span class="keyword">private</span>: <a name="l00093"></a>00093 <a name="l00094"></a>00094 std::streambuf& m_streamBuffer; <a name="l00095"></a>00095 <a class="code" href="class_atlas_1_1_filter.html" title="Atlas stream filter.">Filter</a>& m_filter; <a name="l00096"></a>00096 }; <a name="l00097"></a>00097 <a name="l00098"></a>00098 } <span class="comment">// Atlas namespace</span> <a name="l00099"></a>00099 <a name="l00100"></a>00100 <span class="preprocessor">#endif</span> </pre></div></div> </div> <HR> <P>Copyright 2000-2004 the respective authors.</P> <P>This document can be licensed under the terms of the GNU Free Documentation License or the GNU General Public License and may be freely distributed under the terms given by one of these licenses.</P>