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<title>Exiv2: Exiv2::Internal::TiffVisitor Class Reference</title>
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  <div class="navpath"><a class="el" href="namespaceExiv2.html">Exiv2</a>::<a class="el" href="namespaceExiv2_1_1Internal.html">Internal</a>::<a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html">TiffVisitor</a>
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<h1>Exiv2::Internal::TiffVisitor Class Reference</h1><!-- doxytag: class="Exiv2::Internal::TiffVisitor" -->Abstract base class defining the interface for TIFF composite vistors (Visitor pattern).  
<a href="#_details">More...</a>
<p>
<code>#include &lt;tiffvisitor_int.hpp&gt;</code>
<p>
<div class="dynheader">
Inheritance diagram for Exiv2::Internal::TiffVisitor:</div>
<div class="dynsection">
<p><center><img src="classExiv2_1_1Internal_1_1TiffVisitor__inherit__graph.png" border="0" usemap="#Exiv2_1_1Internal_1_1TiffVisitor__inherit__map" alt="Inheritance graph"></center>
<map name="Exiv2_1_1Internal_1_1TiffVisitor__inherit__map">
<area shape="rect" id="node3" href="classExiv2_1_1Internal_1_1TiffDecoder.html" title="TIFF composite visitor to decode metadata from the TIFF tree and add it to an Image..." alt="" coords="355,5,656,32"><area shape="rect" id="node5" href="classExiv2_1_1Internal_1_1TiffEncoder.html" title="TIFF composite visitor to encode metadata from an image to the TIFF tree. The metadata..." alt="" coords="355,56,656,83"><area shape="rect" id="node7" href="classExiv2_1_1Internal_1_1TiffFinder.html" title="Search the composite for a component with tag and group. Return a pointer to the..." alt="" coords="360,107,651,133"><area shape="rect" id="node9" href="classExiv2_1_1Internal_1_1TiffReader.html" title="TIFF composite visitor to read the TIFF structure from a block of memory and build..." alt="" coords="360,157,651,184"></map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>

<p>
<a href="classExiv2_1_1Internal_1_1TiffVisitor-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 Types</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">enum &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#576a540c43077dd03d768261ebfcec8a">GoEvent</a> { <a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#576a540c43077dd03d768261ebfcec8a143ea958e4dc68dc636fad5fea2c9180">geTraverse</a> =  0, 
<a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#576a540c43077dd03d768261ebfcec8a4c3cf947f58363d79cdf275c09357b31">geKnownMakernote</a> =  1
 }</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Events for the stop/go flag. See <a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#e5ba2a8d7d67f632470d585752a098b3" title="Set the stop/go flag: true for go, false for stop.">setGo()</a>.  <a href="classExiv2_1_1Internal_1_1TiffVisitor.html#576a540c43077dd03d768261ebfcec8a">More...</a><br></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td colspan="2"><div class="groupHeader">Creators</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="253cb67361289149b84f08811065d1e9"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::TiffVisitor" ref="253cb67361289149b84f08811065d1e9" args="()" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#253cb67361289149b84f08811065d1e9">TiffVisitor</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Default constructor. Initialises all stop/go flags to true. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="910e1688da74630910ccaa209bcbb8b6"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::~TiffVisitor" ref="910e1688da74630910ccaa209bcbb8b6" args="()" -->
virtual&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#910e1688da74630910ccaa209bcbb8b6">~TiffVisitor</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Virtual destructor. <br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Manipulators</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#e5ba2a8d7d67f632470d585752a098b3">setGo</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#576a540c43077dd03d768261ebfcec8a">GoEvent</a> event, bool go)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set the stop/go flag: true for go, false for stop.  <a href="#e5ba2a8d7d67f632470d585752a098b3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f004fb7a5e7c72caebdf729b3362b412"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitEntry" ref="f004fb7a5e7c72caebdf729b3362b412" args="(TiffEntry *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#f004fb7a5e7c72caebdf729b3362b412">visitEntry</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffEntry.html">TiffEntry</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for a TIFF entry. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="09a605d7c2e112ccebee4c55366467e3"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitDataEntry" ref="09a605d7c2e112ccebee4c55366467e3" args="(TiffDataEntry *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#09a605d7c2e112ccebee4c55366467e3">visitDataEntry</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffDataEntry.html">TiffDataEntry</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for a TIFF data entry. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ab5927f89109dc8cfcbcb3ccfbe2fb5b"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitImageEntry" ref="ab5927f89109dc8cfcbcb3ccfbe2fb5b" args="(TiffImageEntry *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#ab5927f89109dc8cfcbcb3ccfbe2fb5b">visitImageEntry</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffImageEntry.html">TiffImageEntry</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for a TIFF image entry. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="de6e6eead57ccb78ebc0844402bf3529"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitSizeEntry" ref="de6e6eead57ccb78ebc0844402bf3529" args="(TiffSizeEntry *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#de6e6eead57ccb78ebc0844402bf3529">visitSizeEntry</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffSizeEntry.html">TiffSizeEntry</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for a TIFF size entry. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="9f17fc91eaf54d71663d5d8258f940c3"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitDirectory" ref="9f17fc91eaf54d71663d5d8258f940c3" args="(TiffDirectory *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#9f17fc91eaf54d71663d5d8258f940c3">visitDirectory</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffDirectory.html">TiffDirectory</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for a TIFF directory. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="0f357e136a29ac28fd0b6fa75d3b639a"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitDirectoryNext" ref="0f357e136a29ac28fd0b6fa75d3b639a" args="(TiffDirectory *)" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#0f357e136a29ac28fd0b6fa75d3b639a">visitDirectoryNext</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffDirectory.html">TiffDirectory</a> *)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for a TIFF directory, after all components and before the next entry is processed. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="de800a785da8a0e361ecdac52fd359d6"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitDirectoryEnd" ref="de800a785da8a0e361ecdac52fd359d6" args="(TiffDirectory *)" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#de800a785da8a0e361ecdac52fd359d6">visitDirectoryEnd</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffDirectory.html">TiffDirectory</a> *)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for a TIFF directory, at the end of the processing. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="9ee375a20d3387b94f4c719472e7f196"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitSubIfd" ref="9ee375a20d3387b94f4c719472e7f196" args="(TiffSubIfd *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#9ee375a20d3387b94f4c719472e7f196">visitSubIfd</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffSubIfd.html">TiffSubIfd</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for a TIFF sub-IFD. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="baee0a5b57d41b46d1266c1aeae7f553"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitMnEntry" ref="baee0a5b57d41b46d1266c1aeae7f553" args="(TiffMnEntry *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#baee0a5b57d41b46d1266c1aeae7f553">visitMnEntry</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffMnEntry.html">TiffMnEntry</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for the makernote component. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c16398cc0d44e5aa759c9492b002461d"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitIfdMakernote" ref="c16398cc0d44e5aa759c9492b002461d" args="(TiffIfdMakernote *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#c16398cc0d44e5aa759c9492b002461d">visitIfdMakernote</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffIfdMakernote.html">TiffIfdMakernote</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for an IFD makernote. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="95f4a7b6b42b3dacf551a24ab83c3c72"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitIfdMakernoteEnd" ref="95f4a7b6b42b3dacf551a24ab83c3c72" args="(TiffIfdMakernote *)" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#95f4a7b6b42b3dacf551a24ab83c3c72">visitIfdMakernoteEnd</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffIfdMakernote.html">TiffIfdMakernote</a> *)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform after processing an IFD makernote. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c1aaf47a894685cafe4c9391da92ca2b"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitArrayEntry" ref="c1aaf47a894685cafe4c9391da92ca2b" args="(TiffArrayEntry *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#c1aaf47a894685cafe4c9391da92ca2b">visitArrayEntry</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffArrayEntry.html">TiffArrayEntry</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for an array entry (as found in Canon makernotes). <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e265ffd57c9f3e91d23660b2dad95236"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::visitArrayElement" ref="e265ffd57c9f3e91d23660b2dad95236" args="(TiffArrayElement *object)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#e265ffd57c9f3e91d23660b2dad95236">visitArrayElement</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffArrayElement.html">TiffArrayElement</a> *object)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operation to perform for an array element. <br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Accessors</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="3c0f0648fd65eb69bf96e7773c7bc812"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::go" ref="3c0f0648fd65eb69bf96e7773c7bc812" args="(GoEvent event) const " -->
bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#3c0f0648fd65eb69bf96e7773c7bc812">go</a> (<a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#576a540c43077dd03d768261ebfcec8a">GoEvent</a> event) const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Check if stop flag for <em>event</em> is clear, return true if it's clear. <br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Abstract base class defining the interface for TIFF composite vistors (Visitor pattern). 
<p>
A concrete visitor class is used as shown in the example below. Accept() will invoke the member function corresponding to the concrete type of each component in the composite.<p>
<div class="fragment"><pre class="fragment">      <span class="keywordtype">void</span> visitorExample(<a class="code" href="classExiv2_1_1Internal_1_1TiffComponent.html" title="Interface class for components of a TIFF directory hierarchy (Composite pattern)...">Exiv2::TiffComponent</a>* tiffComponent, <a class="code" href="classExiv2_1_1Internal_1_1TiffVisitor.html" title="Abstract base class defining the interface for TIFF composite vistors (Visitor pattern)...">Exiv2::TiffVisitor</a>&amp; visitor)
      {
          tiffComponent-&gt;<a class="code" href="classExiv2_1_1Internal_1_1TiffComponent.html#e76a57686b20b3f0db99dd43162e6aef" title="Interface to accept visitors (Visitor pattern). Visitors can perform operations on...">accept</a>(visitor);
      }
</pre></div> <hr><h2>Member Enumeration Documentation</h2>
<a class="anchor" name="576a540c43077dd03d768261ebfcec8a"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::GoEvent" ref="576a540c43077dd03d768261ebfcec8a" args="" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">enum <a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#576a540c43077dd03d768261ebfcec8a">Exiv2::Internal::TiffVisitor::GoEvent</a>          </td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Events for the stop/go flag. See <a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#e5ba2a8d7d67f632470d585752a098b3" title="Set the stop/go flag: true for go, false for stop.">setGo()</a>. 
<p>
<dl compact><dt><b>Enumerator: </b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" name="576a540c43077dd03d768261ebfcec8a143ea958e4dc68dc636fad5fea2c9180"></a><!-- doxytag: member="geTraverse" ref="576a540c43077dd03d768261ebfcec8a143ea958e4dc68dc636fad5fea2c9180" args="" -->geTraverse</em>&nbsp;</td><td>
Signal to control traversing of the composite tree. </td></tr>
<tr><td valign="top"><em><a class="anchor" name="576a540c43077dd03d768261ebfcec8a4c3cf947f58363d79cdf275c09357b31"></a><!-- doxytag: member="geKnownMakernote" ref="576a540c43077dd03d768261ebfcec8a4c3cf947f58363d79cdf275c09357b31" args="" -->geKnownMakernote</em>&nbsp;</td><td>
Signal used by <a class="el" href="classExiv2_1_1Internal_1_1TiffReader.html" title="TIFF composite visitor to read the TIFF structure from a block of memory and build...">TiffReader</a> to signal an unknown makernote. </td></tr>
</table>
</dl>

</div>
</div><p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="e5ba2a8d7d67f632470d585752a098b3"></a><!-- doxytag: member="Exiv2::Internal::TiffVisitor::setGo" ref="e5ba2a8d7d67f632470d585752a098b3" args="(GoEvent event, bool go)" -->
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          <td class="memname">void Exiv2::Internal::TiffVisitor::setGo           </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="classExiv2_1_1Internal_1_1TiffVisitor.html#576a540c43077dd03d768261ebfcec8a">GoEvent</a>&nbsp;</td>
          <td class="paramname"> <em>event</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">bool&nbsp;</td>
          <td class="paramname"> <em>go</em></td><td>&nbsp;</td>
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          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
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<div class="memdoc">

<p>
Set the stop/go flag: true for go, false for stop. 
<p>
This mechanism is used by visitors and components to signal special events. Specifically, <a class="el" href="classExiv2_1_1Internal_1_1TiffFinder.html" title="Search the composite for a component with tag and group. Return a pointer to the...">TiffFinder</a> sets the geTraverse flag as soon as it finds the correct component to signal to components that the search should be aborted. <a class="el" href="classExiv2_1_1Internal_1_1TiffReader.html" title="TIFF composite visitor to read the TIFF structure from a block of memory and build...">TiffReader</a> uses geKnownMakernote to signal problems reading a makernote to the <a class="el" href="classExiv2_1_1Internal_1_1TiffMnEntry.html" title="This class is the basis for Makernote support in TIFF. It contains a pointer to a...">TiffMnEntry</a> component. There is an array of flags, one for each defined <em>event</em>, so different signals can be used independent of each other. 
<p>Referenced by <a class="el" href="tiffvisitor_8cpp_source.html#l00117">Exiv2::Internal::TiffFinder::findObject()</a>, <a class="el" href="tiffvisitor_8cpp_source.html#l00515">Exiv2::Internal::TiffEncoder::setDirty()</a>, and <a class="el" href="tiffvisitor_8cpp_source.html#l01231">Exiv2::Internal::TiffReader::visitIfdMakernote()</a>.</p>

</div>
</div><p>
<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="tiffvisitor__int_8hpp.html">tiffvisitor_int.hpp</a><li>tiffvisitor.cpp</ul>
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<hr size="1"><address style="text-align: right;"><small>Generated on Thu Jun 25 15:18:16 2009 for Exiv2 by&nbsp;
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.9 </small></address>
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