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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>PASN_Null class Reference</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.2.18 --><center><a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="namespaces.html">Namespace List</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="annotated.html">Compound List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Compound Members</a> <a class="qindex" href="globals.html">File Members</a> </center><hr><h1>PASN_Null Class Reference</h1><code>#include <<a class="el" href="asner_8h-source.html">asner.h</a>></code><p><p>Inheritance diagram for PASN_Null:<p><center><img src="classPASN__Null.png" usemap="#PASN_Null_map" border="0" alt=""></center><map name="PASN_Null_map"><area href="classPASN__Object.html" alt="PASN_Object" shape="rect" coords="0,56,90,80"><area href="classPObject.html" alt="PObject" shape="rect" coords="0,0,90,24"></map><a href="classPASN__Null-members.html">List of all members.</a><table border=0 cellpadding=0 cellspacing=0><tr><td></td></tr><tr><td colspan=2><br><h2>Public Methods</h2></td></tr><tr><td nowrap align=right valign=top> </td><td valign=bottom><a class="el" href="classPASN__Null.html#a0">PASN_Null</a> (unsigned <a class="el" href="classPASN__Object.html#n2">tag</a>=UniversalNull, <a class="el" href="classPASN__Object.html#s38">TagClass</a> <a class="el" href="classPASN__Object.html#n1">tagClass</a>=UniversalTagClass)</td></tr><tr><td nowrap align=right valign=top>virtual <a class="el" href="classPObject.html#z199_0">Comparison</a> </td><td valign=bottom><a class="el" href="classPASN__Null.html#a1">Compare</a> (const <a class="el" href="classPObject.html">PObject</a> &obj) const</td></tr><tr><td nowrap align=right valign=top>virtual <a class="el" href="classPObject.html">PObject</a> * </td><td valign=bottom><a class="el" href="classPASN__Null.html#a2">Clone</a> () const</td></tr><tr><td nowrap align=right valign=top>virtual void </td><td valign=bottom><a class="el" href="classPASN__Null.html#a3">PrintOn</a> (ostream &strm) const</td></tr><tr><td nowrap align=right valign=top>virtual <a class="el" href="classPString.html">PString</a> </td><td valign=bottom><a class="el" href="classPASN__Null.html#a4">GetTypeAsString</a> () const</td></tr><tr><td nowrap align=right valign=top>virtual PINDEX </td><td valign=bottom><a class="el" href="classPASN__Null.html#a5">GetDataLength</a> () const</td></tr><tr><td nowrap align=right valign=top>virtual BOOL </td><td valign=bottom><a class="el" href="classPASN__Null.html#a6">Decode</a> (<a class="el" href="classPASN__Stream.html">PASN_Stream</a> &)</td></tr><tr><td nowrap align=right valign=top>virtual void </td><td valign=bottom><a class="el" href="classPASN__Null.html#a7">Encode</a> (<a class="el" href="classPASN__Stream.html">PASN_Stream</a> &) const</td></tr></table><hr><a name="_details"></a><h2>Detailed Description</h2>Class for ASN Null type. <p><hr><h2>Constructor & Destructor Documentation</h2><a name="a0" doxytag="PASN_Null::PASN_Null"></a><p><table width="100%" cellpadding="2" cellspacing="0" border="0"> <tr> <td class="md"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> PASN_Null::PASN_Null </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">unsigned </td> <td class="mdname" nowrap> <em>tag</em> = UniversalNull, </td> </tr> <tr> <td></td> <td></td> <td class="md" nowrap><a class="el" href="classPASN__Object.html#s38">TagClass</a> </td> <td class="mdname" nowrap> <em>tagClass</em> = UniversalTagClass</td> </tr> <tr> <td></td> <td class="md">) </td> <td class="md" colspan="2"></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p> </td> </tr></table><hr><h2>Member Function Documentation</h2><a name="a2" doxytag="PASN_Null::Clone"></a><p><table width="100%" cellpadding="2" cellspacing="0" border="0"> <tr> <td class="md"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> virtual <a class="el" href="classPObject.html">PObject</a>* PASN_Null::Clone </td> <td class="md" valign="top">( </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top">) </td> <td class="md" nowrap><code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p>Create a copy of the class on the heap. The exact semantics of the descendent class determine what is required to make a duplicate of the instance. Not all classes can even {\bf do} a clone operation.<p>The main user of the clone function is the PDictionary# class as it requires copies of the dictionary keys.<p>The default behaviour is for this function to assert.<p><dl compact><dt><b>Returns: </b></dt><dd> pointer to new copy of the class instance. </dl><p>Reimplemented from <a class="el" href="classPObject.html#z203_0">PObject</a>. </td> </tr></table><a name="a1" doxytag="PASN_Null::Compare"></a><p><table width="100%" cellpadding="2" cellspacing="0" border="0"> <tr> <td class="md"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> virtual <a class="el" href="classPObject.html#z199_0">Comparison</a> PASN_Null::Compare </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">const <a class="el" href="classPObject.html">PObject</a> & </td> <td class="mdname1" valign="top" nowrap> <em>obj</em> </td> <td class="md" valign="top">) </td> <td class="md" nowrap> const<code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p>Compare the two objects and return their relative rank. This function is usually overridden by descendent classes to yield the ranking according to the semantics of the object.<p>The default function is to use the <a class="el" href="classPObject.html#z199_2">CompareObjectMemoryDirect()</a># function to do a byte wise memory comparison of the two objects.<p><dl compact><dt><b>Returns: </b></dt><dd> <a class="el" href="classPObject.html#z199_0s0">LessThan</a>#, <a class="el" href="classPObject.html#z199_0s1">EqualTo</a># or <a class="el" href="classPObject.html#z199_0s2">GreaterThan</a># according to the relative rank of the objects. </dl><p>Reimplemented from <a class="el" href="classPObject.html#z199_1">PObject</a>. </td> </tr></table><a name="a6" doxytag="PASN_Null::Decode"></a><p><table width="100%" cellpadding="2" cellspacing="0" border="0"> <tr> <td class="md"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> virtual BOOL PASN_Null::Decode </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top"><a class="el" href="classPASN__Stream.html">PASN_Stream</a> & </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top">) </td> <td class="md" nowrap><code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p><p>Implements <a class="el" href="classPASN__Object.html#a4">PASN_Object</a>. </td> </tr></table><a name="a7" doxytag="PASN_Null::Encode"></a><p><table width="100%" cellpadding="2" cellspacing="0" border="0"> <tr> <td class="md"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> virtual void PASN_Null::Encode </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top"><a class="el" href="classPASN__Stream.html">PASN_Stream</a> & </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top">) </td> <td class="md" nowrap> const<code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p><p>Implements <a class="el" href="classPASN__Object.html#a5">PASN_Object</a>. </td> </tr></table><a name="a5" doxytag="PASN_Null::GetDataLength"></a><p><table width="100%" cellpadding="2" cellspacing="0" border="0"> <tr> <td class="md"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> virtual PINDEX PASN_Null::GetDataLength </td> <td class="md" valign="top">( </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top">) </td> <td class="md" nowrap><code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p><p>Implements <a class="el" href="classPASN__Object.html#a2">PASN_Object</a>. </td> </tr></table><a name="a4" doxytag="PASN_Null::GetTypeAsString"></a><p><table width="100%" cellpadding="2" cellspacing="0" border="0"> <tr> <td class="md"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> virtual <a class="el" href="classPString.html">PString</a> PASN_Null::GetTypeAsString </td> <td class="md" valign="top">( </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top">) </td> <td class="md" nowrap><code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p>Return a string giving the type of the object <p>Implements <a class="el" href="classPASN__Object.html#a0">PASN_Object</a>. </td> </tr></table><a name="a3" doxytag="PASN_Null::PrintOn"></a><p><table width="100%" cellpadding="2" cellspacing="0" border="0"> <tr> <td class="md"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> virtual void PASN_Null::PrintOn </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">ostream & </td> <td class="mdname1" valign="top" nowrap> <em>strm</em> </td> <td class="md" valign="top">) </td> <td class="md" nowrap> const<code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p>Output the contents of the object to the stream. The exact output is dependent on the exact semantics of the descendent class. This is primarily used by the standard operator<<# function.<p>The default behaviour is to print the class name. <p>Reimplemented from <a class="el" href="classPObject.html#z201_0">PObject</a>. </td> </tr></table><hr>The documentation for this class was generated from the following file:<ul><li><a class="el" href="asner_8h-source.html">asner.h</a></ul><hr><address style="align: right;"><small>Generated on Wed Sep 29 22:44:13 2004 for PWLib by<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border=0 width=110 height=53></a>1.2.18 </small></address></body></html>⌨️ 快捷键说明
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