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      This is an automatically generated e-mail. To reply, visit:
      <a href="https://reviewboard.asterisk.org/r/2264/">https://reviewboard.asterisk.org/r/2264/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
 <p style="margin-top: 0;">On January 10th, 2013, 2:57 a.m., <b>wdoekes</b> wrote:</p>
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    <a href="https://reviewboard.asterisk.org/r/2264/diff/2/?file=32776#file32776line357" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/res/res_json.c</a>
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     (Diff revision 2)

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   <td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
   <td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int write_to_ast_str(const char *buffer, size_t size, void *data)</pre></td>

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    <th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">357</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">        <span class="k">while</span> <span class="p">(</span><span class="n">remaining</span> <span class="o">&lt;</span> <span class="n">size</span><span class="p">)</span> <span class="p">{</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">358</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">                <span class="cm">/* doubling the size of the buffer gives us &#39;amortized</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">359</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm">                 * constant&#39; time.</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">360</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm">                 * See http://stackoverflow.com/a/249695/115478 for info.</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">361</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm">                 */</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">362</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">                <span class="kt">int</span> <span class="n">ret</span> <span class="o">=</span> <span class="n">ast_str_make_space</span><span class="p">(</span><span class="n">dst</span><span class="p">,</span> <span class="mi">2</span> <span class="o">*</span> <span class="n">ast_str_size</span><span class="p">(</span><span class="o">*</span><span class="n">dst</span><span class="p">));</span></pre></td>
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  <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Ok, you&#39;re doubling it because we can expect more data in the future.

But putting the make_space() call inside the loop looks inefficient.

while(remaining &lt; size) {
  multiplier &lt;&lt;= 1;
  remaining = ast_str_size(*dst) * multiplier - ast_str_strlen(*dst);
}

.. and I believe make_space() does not account for the terminating NUL that append_substr() will be adding.

P.S. Should dump_str() get a load_str() friend?</pre>
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</blockquote>
<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Done.</pre>
<br />




<p>- David</p>


<br />
<p>On January 9th, 2013, 11:26 p.m., David Lee wrote:</p>






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<div>Review request for Asterisk Developers.</div>
<div>By David Lee.</div>


<p style="color: grey;"><i>Updated Jan. 9, 2013, 11:26 p.m.</i></p>




<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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   <pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This provides a JSON API by pulling in and wrapping the Jansson JSON
library[1]. The Asterisk API basically mirrors the Jansson
functionality, with a few minor tweaks:

 * Jansson provides both reference-stealing and reference-borrowing
   versions of several API&#39;s. The Asterisk API is exclusively
   reference-stealing for operations that put elements into arrays and
   objects.
 * No support for doubles, since we usually don&#39;t need that.
 * Coming along for the ride is the ast_test_check macro, which makes
   it easier to accumulate the results of several operations in a test.

 [1]: http://www.digip.org/jansson/</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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   <pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Behold, extensive unit tests!</pre>
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<div style="margin-top: 1.5em;">
 <b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>


 <a href="https://issues.asterisk.org/jira/browse/ASTERISK-20888">ASTERISK-20888</a>


</div>


<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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 <li>/trunk/build_tools/menuselect-deps.in <span style="color: grey">(378906)</span></li>

 <li>/trunk/configure.ac <span style="color: grey">(378906)</span></li>

 <li>/trunk/contrib/scripts/install_prereq <span style="color: grey">(378906)</span></li>

 <li>/trunk/include/asterisk/autoconfig.h.in <span style="color: grey">(378906)</span></li>

 <li>/trunk/include/asterisk/json.h <span style="color: grey">(PRE-CREATION)</span></li>

 <li>/trunk/include/asterisk/test.h <span style="color: grey">(378906)</span></li>

 <li>/trunk/main/Makefile <span style="color: grey">(378906)</span></li>

 <li>/trunk/main/test.c <span style="color: grey">(378906)</span></li>

 <li>/trunk/makeopts.in <span style="color: grey">(378906)</span></li>

 <li>/trunk/res/res_json.c <span style="color: grey">(PRE-CREATION)</span></li>

 <li>/trunk/res/res_json.exports.in <span style="color: grey">(PRE-CREATION)</span></li>

 <li>/trunk/tests/test_json.c <span style="color: grey">(PRE-CREATION)</span></li>

</ul>

<p><a href="https://reviewboard.asterisk.org/r/2264/diff/" style="margin-left: 3em;">View Diff</a></p>




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