<!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"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.14"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>Crypto++: NullNameValuePairs Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">Crypto++  <span id="projectnumber">7.0</span> </div> <div id="projectbrief">Free C++ class library of cryptographic schemes</div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.14 --> <script type="text/javascript" src="menudata.js"></script> <script type="text/javascript" src="menu.js"></script> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(function() { initMenu('',false,false,'search.php','Search'); }); /* @license-end */</script> <div id="main-nav"></div> </div><!-- top --> <div class="header"> <div class="summary"> <a href="#pub-methods">Public Member Functions</a> | <a href="class_null_name_value_pairs-members.html">List of all members</a> </div> <div class="headertitle"> <div class="title">NullNameValuePairs Class Reference</div> </div> </div><!--header--> <div class="contents"> <p>Interface for retrieving values given their names. <a href="class_null_name_value_pairs.html#details">More...</a></p> <div id="dynsection-0" onclick="return toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"> <img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for NullNameValuePairs:</div> <div id="dynsection-0-summary" class="dynsummary" style="display:block;"> </div> <div id="dynsection-0-content" class="dyncontent" style="display:none;"> <div class="center"> <img src="class_null_name_value_pairs.png" usemap="#NullNameValuePairs_map" alt=""/> <map id="NullNameValuePairs_map" name="NullNameValuePairs_map"> <area href="class_name_value_pairs.html" title="Interface for retrieving values given their names. " alt="NameValuePairs" shape="rect" coords="0,0,128,24"/> </map> </div></div> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr class="memitem:a9cda624f55e8f6f5dff28152d91bf18d"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_null_name_value_pairs.html#a9cda624f55e8f6f5dff28152d91bf18d">GetVoidValue</a> (const char *name, const std::type_info &valueType, void *pValue) const</td></tr> <tr class="memdesc:a9cda624f55e8f6f5dff28152d91bf18d"><td class="mdescLeft"> </td><td class="mdescRight">Get a named value. <a href="#a9cda624f55e8f6f5dff28152d91bf18d">More...</a><br /></td></tr> <tr class="separator:a9cda624f55e8f6f5dff28152d91bf18d"><td class="memSeparator" colspan="2"> </td></tr> <tr class="inherit_header pub_methods_class_name_value_pairs"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_name_value_pairs')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_name_value_pairs.html">NameValuePairs</a></td></tr> <tr class="memitem:a3401528f3d69d70f200086501b8af282 inherit pub_methods_class_name_value_pairs"><td class="memTemplParams" colspan="2">template<class T > </td></tr> <tr class="memitem:a3401528f3d69d70f200086501b8af282 inherit pub_methods_class_name_value_pairs"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#a3401528f3d69d70f200086501b8af282">GetThisObject</a> (T &object) const</td></tr> <tr class="memdesc:a3401528f3d69d70f200086501b8af282 inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Get a copy of this object or subobject. <a href="class_name_value_pairs.html#a3401528f3d69d70f200086501b8af282">More...</a><br /></td></tr> <tr class="separator:a3401528f3d69d70f200086501b8af282 inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:abce7b413ce1345ab7b7d05fa3d1834f5 inherit pub_methods_class_name_value_pairs"><td class="memTemplParams" colspan="2">template<class T > </td></tr> <tr class="memitem:abce7b413ce1345ab7b7d05fa3d1834f5 inherit pub_methods_class_name_value_pairs"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#abce7b413ce1345ab7b7d05fa3d1834f5">GetThisPointer</a> (T *&ptr) const</td></tr> <tr class="memdesc:abce7b413ce1345ab7b7d05fa3d1834f5 inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Get a pointer to this object. <a href="class_name_value_pairs.html#abce7b413ce1345ab7b7d05fa3d1834f5">More...</a><br /></td></tr> <tr class="separator:abce7b413ce1345ab7b7d05fa3d1834f5 inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a5357c3a09602e44671d1e42cb9a9408d inherit pub_methods_class_name_value_pairs"><td class="memTemplParams" colspan="2">template<class T > </td></tr> <tr class="memitem:a5357c3a09602e44671d1e42cb9a9408d inherit pub_methods_class_name_value_pairs"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#a5357c3a09602e44671d1e42cb9a9408d">GetValue</a> (const char *name, T &value) const</td></tr> <tr class="memdesc:a5357c3a09602e44671d1e42cb9a9408d inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Get a named value. <a href="class_name_value_pairs.html#a5357c3a09602e44671d1e42cb9a9408d">More...</a><br /></td></tr> <tr class="separator:a5357c3a09602e44671d1e42cb9a9408d inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a4daf1ef67b547c6be96188a43e5ec05e inherit pub_methods_class_name_value_pairs"><td class="memTemplParams" colspan="2">template<class T > </td></tr> <tr class="memitem:a4daf1ef67b547c6be96188a43e5ec05e inherit pub_methods_class_name_value_pairs"><td class="memTemplItemLeft" align="right" valign="top">T </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#a4daf1ef67b547c6be96188a43e5ec05e">GetValueWithDefault</a> (const char *name, T defaultValue) const</td></tr> <tr class="memdesc:a4daf1ef67b547c6be96188a43e5ec05e inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Get a named value. <a href="class_name_value_pairs.html#a4daf1ef67b547c6be96188a43e5ec05e">More...</a><br /></td></tr> <tr class="separator:a4daf1ef67b547c6be96188a43e5ec05e inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a13faea827ee047cd58557282806ed2e1 inherit pub_methods_class_name_value_pairs"><td class="memItemLeft" align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#a13faea827ee047cd58557282806ed2e1">GetValueNames</a> () const</td></tr> <tr class="memdesc:a13faea827ee047cd58557282806ed2e1 inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Get a list of value names that can be retrieved. <a href="class_name_value_pairs.html#a13faea827ee047cd58557282806ed2e1">More...</a><br /></td></tr> <tr class="separator:a13faea827ee047cd58557282806ed2e1 inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a94e5b19dc54625799797668ff8627c57 inherit pub_methods_class_name_value_pairs"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#a94e5b19dc54625799797668ff8627c57">GetIntValue</a> (const char *name, int &value) const</td></tr> <tr class="memdesc:a94e5b19dc54625799797668ff8627c57 inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Get a named value with type int. <a href="class_name_value_pairs.html#a94e5b19dc54625799797668ff8627c57">More...</a><br /></td></tr> <tr class="separator:a94e5b19dc54625799797668ff8627c57 inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a7ddb654b7afcd1a04422a7b4b01366d9 inherit pub_methods_class_name_value_pairs"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#a7ddb654b7afcd1a04422a7b4b01366d9">GetIntValueWithDefault</a> (const char *name, int defaultValue) const</td></tr> <tr class="memdesc:a7ddb654b7afcd1a04422a7b4b01366d9 inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Get a named value with type int, with default. <a href="class_name_value_pairs.html#a7ddb654b7afcd1a04422a7b4b01366d9">More...</a><br /></td></tr> <tr class="separator:a7ddb654b7afcd1a04422a7b4b01366d9 inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:af28f6e7abf98606d8146bfda271e99db inherit pub_methods_class_name_value_pairs"><td class="memTemplParams" colspan="2">template<class T > </td></tr> <tr class="memitem:af28f6e7abf98606d8146bfda271e99db inherit pub_methods_class_name_value_pairs"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#af28f6e7abf98606d8146bfda271e99db">GetRequiredParameter</a> (const char *className, const char *name, T &value) const</td></tr> <tr class="memdesc:af28f6e7abf98606d8146bfda271e99db inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Retrieves a required name/value pair. <a href="class_name_value_pairs.html#af28f6e7abf98606d8146bfda271e99db">More...</a><br /></td></tr> <tr class="separator:af28f6e7abf98606d8146bfda271e99db inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:acfb673d912e1bc19386bebba9d58c23f inherit pub_methods_class_name_value_pairs"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#acfb673d912e1bc19386bebba9d58c23f">GetRequiredIntParameter</a> (const char *className, const char *name, int &value) const</td></tr> <tr class="memdesc:acfb673d912e1bc19386bebba9d58c23f inherit pub_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Retrieves a required name/value pair. <a href="class_name_value_pairs.html#acfb673d912e1bc19386bebba9d58c23f">More...</a><br /></td></tr> <tr class="separator:acfb673d912e1bc19386bebba9d58c23f inherit pub_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> </table><table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a> Additional Inherited Members</h2></td></tr> <tr class="inherit_header pub_static_methods_class_name_value_pairs"><td colspan="2" onclick="javascript:toggleInherit('pub_static_methods_class_name_value_pairs')"><img src="closed.png" alt="-"/> Static Public Member Functions inherited from <a class="el" href="class_name_value_pairs.html">NameValuePairs</a></td></tr> <tr class="memitem:ad4b80eeeb5f1f58e3cedb12f02a6b870 inherit pub_static_methods_class_name_value_pairs"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_name_value_pairs.html#ad4b80eeeb5f1f58e3cedb12f02a6b870">ThrowIfTypeMismatch</a> (const char *name, const std::type_info &stored, const std::type_info &retrieving)</td></tr> <tr class="memdesc:ad4b80eeeb5f1f58e3cedb12f02a6b870 inherit pub_static_methods_class_name_value_pairs"><td class="mdescLeft"> </td><td class="mdescRight">Ensures an expected name and type is present. <a href="class_name_value_pairs.html#ad4b80eeeb5f1f58e3cedb12f02a6b870">More...</a><br /></td></tr> <tr class="separator:ad4b80eeeb5f1f58e3cedb12f02a6b870 inherit pub_static_methods_class_name_value_pairs"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> <div class="textblock"><p>Interface for retrieving values given their names. </p> <p>This class is used when no names or values are present. Typically a program uses g_nullNameValuePairs rather than creating its own <a class="el" href="class_null_name_value_pairs.html" title="Interface for retrieving values given their names. ">NullNameValuePairs</a> object.</p> <p><a class="el" href="class_null_name_value_pairs.html" title="Interface for retrieving values given their names. ">NullNameValuePairs</a> always existed in <a class="el" href="cryptlib_8cpp_source.html">cryptlib.cpp</a>. Crypto++ 6.0 moved <a class="el" href="class_null_name_value_pairs.html" title="Interface for retrieving values given their names. ">NullNameValuePairs</a> into the header. This allowed the library to define g_nullNameValuePairs in the header rather than declaring it as extern and placing the definition in the source file. As an external definition the string g_nullNameValuePairs was subject to static initialization order fiasco problems. </p><dl class="section see"><dt>See also</dt><dd><a class="el" href="class_name_value_pairs.html" title="Interface for retrieving values given their names. ">NameValuePairs</a>, <a class="el" href="cryptlib_8h.html#a04be65ada92ccb1e6aac0d94b4cc394b" title="An empty set of name-value pairs. ">g_nullNameValuePairs</a>, <a href="http://www.cryptopp.com/wiki/NameValuePairs">NameValuePairs</a> on the Crypto++ wiki </dd></dl> <p class="definition">Definition at line <a class="el" href="cryptlib_8h_source.html#l00461">461</a> of file <a class="el" href="cryptlib_8h_source.html">cryptlib.h</a>.</p> </div><h2 class="groupheader">Member Function Documentation</h2> <a id="a9cda624f55e8f6f5dff28152d91bf18d"></a> <h2 class="memtitle"><span class="permalink"><a href="#a9cda624f55e8f6f5dff28152d91bf18d">◆ </a></span>GetVoidValue()</h2> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">bool NullNameValuePairs::GetVoidValue </td> <td>(</td> <td class="paramtype">const char * </td> <td class="paramname"><em>name</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">const std::type_info & </td> <td class="paramname"><em>valueType</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">void * </td> <td class="paramname"><em>pValue</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td> const</td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">virtual</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Get a named value. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">name</td><td>the name of the object or value to retrieve </td></tr> <tr><td class="paramname">valueType</td><td>reference to a variable that receives the value </td></tr> <tr><td class="paramname">pValue</td><td>void pointer to a variable that receives the value </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>true if the value was retrieved, false otherwise</dd></dl> <p><a class="el" href="class_null_name_value_pairs.html#a9cda624f55e8f6f5dff28152d91bf18d" title="Get a named value. ">GetVoidValue()</a> retrieves the value of name if it exists. </p><dl class="section note"><dt>Note</dt><dd><a class="el" href="class_null_name_value_pairs.html#a9cda624f55e8f6f5dff28152d91bf18d" title="Get a named value. ">GetVoidValue()</a> is an internal function and should be implemented by derived classes. Users should use one of the other functions instead. </dd></dl> <dl class="section see"><dt>See also</dt><dd><a class="el" href="class_name_value_pairs.html#a5357c3a09602e44671d1e42cb9a9408d" title="Get a named value. ">GetValue()</a>, <a class="el" href="class_name_value_pairs.html#a4daf1ef67b547c6be96188a43e5ec05e" title="Get a named value. ">GetValueWithDefault()</a>, <a class="el" href="class_name_value_pairs.html#a94e5b19dc54625799797668ff8627c57" title="Get a named value with type int. ">GetIntValue()</a>, <a class="el" href="class_name_value_pairs.html#a7ddb654b7afcd1a04422a7b4b01366d9" title="Get a named value with type int, with default. ">GetIntValueWithDefault()</a>, <a class="el" href="class_name_value_pairs.html#af28f6e7abf98606d8146bfda271e99db" title="Retrieves a required name/value pair. ">GetRequiredParameter()</a> and <a class="el" href="class_name_value_pairs.html#acfb673d912e1bc19386bebba9d58c23f" title="Retrieves a required name/value pair. ">GetRequiredIntParameter()</a> </dd></dl> <p>Implements <a class="el" href="class_name_value_pairs.html#a9fc3f5c4480d53b8104c67ca7958e332">NameValuePairs</a>.</p> <p class="definition">Definition at line <a class="el" href="cryptlib_8h_source.html#l00465">465</a> of file <a class="el" href="cryptlib_8h_source.html">cryptlib.h</a>.</p> </div> </div> <hr/>The documentation for this class was generated from the following file:<ul> <li><a class="el" href="cryptlib_8h_source.html">cryptlib.h</a></li> </ul> </div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated on Sun Sep 16 2018 07:58:45 for Crypto++ by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.14 </small></address> </body> </html>