<h4>Pre-Submission Checklist</h4>



<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Commit message has the format required by CONTRIBUTING guide</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Commits are split per component (core, individual modules, libs, utils, ...)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Each component has a single commit (if not, squash them into one commit)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> No commits to README files for modules (changes must be done to docbook files<br>
in <code>doc/</code> subfolder, the README file is autogenerated)</li>
</ul>
<h4>Type Of Change</h4>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Small bug fix (non-breaking change which fixes an issue)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> New feature (non-breaking change which adds new functionality)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Breaking change (fix or feature that would change existing functionality)</li>
</ul>
<h4>Checklist:</h4>

<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> PR should be backported to stable branches</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Tested changes locally</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Related to issue #XXXX (replace XXXX with an open issue number)</li>
</ul>
<h4>Description</h4>
<p>MR to add another xavp_copy function taking 4 params</p>
<pre><code> xavc_copy("source_name", "source_index", "destination_name", "destination_index")
</code></pre>
<p>This will let the user copy to a specific position in the stack (replacing its value).<br>
This would bring coherent behaviour compared to assign to a specific index vs appending.</p>
<p>Example : swapping xavp in and existing stack:<br>
(second and third elements)</p>
<pre><code>$xavp(a=>x) = "a-0-x";
$xavp(a[0]=>y) = "a-0-y";
$xavp(a=>x) = "a-1-x";
$xavp(a[0]=>y) = "a-1-y";
$xavp(a=>x) = "a-2-x";
$xavp(a[0]=>y) = "a-2-y";

# INFO: <script>: NEW $xavp(a[0]) = [a-2-x][a-2-y]
# INFO: <script>: NEW $xavp(a[1]) = [a-1-x][a-1-y]
# INFO: <script>: NEW $xavp(a[2]) = [a-0-x][a-0-y]

xavp_copy("a", "1", "c");
xavp_copy("a", "2", "a", "1");
xavp_copy("c", "0", "a", "2");

# INFO: <script>: AFTER $xavp(a[0]) = [a-2-x][a-2-y]
# INFO: <script>: AFTER $xavp(a[1]) = [a-0-x][a-0-y]
# INFO: <script>: AFTER $xavp(a[2]) = [a-1-x][a-1-y]
</code></pre>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/kamailio/kamailio/pull/2097'>https://github.com/kamailio/kamailio/pull/2097</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>pv: adding xavp_copy with destination index</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2097/files#diff-0">src/modules/pv/pv.c</a>
    (78)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/kamailio/kamailio/pull/2097.patch'>https://github.com/kamailio/kamailio/pull/2097.patch</a></li>
  <li><a href='https://github.com/kamailio/kamailio/pull/2097.diff'>https://github.com/kamailio/kamailio/pull/2097.diff</a></li>
</ul>

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