<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Rmudgett,<div><br></div><div>When I started this clean up my main goal was to improve the overall readability of the code, especially the main loop of the app. I think this patch achieves this, but there is lots of room for improvements. KNK has a few patches with new features and cleanups for this app too, and I might make some others. Your review is very much appreciated, I'll cook a patch to clean up this function, and also the NULL string ending issue that Mark commented.</div><div><br></div><div>Sorry for not commenting on the reviewboard, as I don't have access to it dev-list is the only option. I'll post the new patch on one of the related JIRA ticket.</div><div><br></div><div>Cheers,</div><div>Pedro Kiefer</div><div><br><div><div>On Aug 20, 2012, at 4:18 PM, rmudgett <<a href="mailto:reviewboard@asterisk.org">reviewboard@asterisk.org</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/2075/">https://reviewboard.asterisk.org/r/2075/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;"><p style="margin-top: 0;">On August 20th, 2012, 1:44 p.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/2075/diff/3/?file=31019#file31019line478" style="font-weight: bold; text-decoration: underline; ">/trunk/apps/app_alarmreceiver.c</a>
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(Diff revision 3)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int ademco_verify_checksum(char *event)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">static</span> <span class="kt">int</span> <span class="nf">ademco_verify_checksum</span><span class="p">(</span><span class="kt">char</span> <span class="o">*</span><span class="n">event</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; "><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; "> <span class="k">static</span> <span class="kt">char</span> <span class="n">digit_map</span><span class="p">[</span><span class="mi">15</span><span class="p">]</span> <span class="o">=</span> <span class="s">"0123456789*#ABC"</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; "> <span class="k">static</span> <span class="kt">unsigned</span> <span class="kt">char</span> <span class="n">digit_weights</span><span class="p">[</span><span class="mi">15</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">,</span> <span class="mi">9</span><span class="p">,</span> <span class="mi">11</span><span class="p">,</span> <span class="mi">12</span><span class="p">,</span> <span class="mi">13</span><span class="p">,</span> <span class="mi">14</span><span class="p">,</span> <span class="mi">15</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; "> <span class="kt">int</span> <span class="n">checksum</span> <span class="o">=</span> <span class="mi">0</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; "> <span class="kt">int</span> <span class="n">i</span><span class="p">,</span> <span class="n">j</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; "> <span class="k">for</span> <span class="p">(</span><span class="n">j</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">checksum</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">j</span> <span class="o"><</span> <span class="mi">16</span><span class="p">;</span> <span class="n">j</span><span class="o">++</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; "> <span class="k">for</span> <span class="p">(</span><span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">i</span> <span class="o"><</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">digit_map</span><span class="p">);</span> <span class="n">i</span><span class="o">++</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; "> <span class="k">if</span> <span class="p">(</span><span class="n">digit_map</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">==</span> <span class="n">event</span><span class="p">[</span><span class="n">j</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; "> <span class="k">break</span><span class="p">;</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">return</span> <span class="n">res</span><span class="p">;</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">i</span> <span class="o">==</span> <span class="mi">16</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; "> <span class="k">break</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; "> <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; "> <span class="n">checksum</span> <span class="o">+=</span> <span class="n">digit_weights</span><span class="p">[</span><span class="n">i</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;">There are a few things I don't like here.
First, I think you should pass the size of the event as a parameter to this function. This way there are fewer magic 16s being used in this function. I had to look a few times to make sure you could not possibly access data you should not be accessing.
Second, you can declare the arrays without the size being specified (e.g. static char digit_map[] = "0123456789*#ABC";)
Third, instead of using sizeof(digit_map) use ARRAY_LEN(digit_map). In this case, they evaluate to the same thing, but using ARRAY_LEN makes it much clearer that you mean the length of the array.
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<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;">You have to declare digit_map[15] = "0123456789*#ABC" because initializing it with a string would also includes a nul terminator in the array size. Of course you could initialize it character by character. Then you would not need the explicit array dimension.
Another way to declare this so you know what maps with what is:
struct {
char digit;
char weight;
} mapping[] = { {'0', 10 },... };
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<br><p>- rmudgett</p>
<br><p>On August 17th, 2012, 1:17 p.m., KNK wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By KNK.</div><p style="color: grey;"><i>Updated Aug. 17, 2012, 1:17 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;">Review on behalf of Pedro Kiefer: cleanups from ASTERISK-20224, ASTERISK-20157 and the updated ASTERISK-16694 (author Fred van Lieshout) + improvement from ASTERISK-20158
There are several issues opened for bugs in app_alarmreceiver (ASTERISK-19435, ASTERISK-18417, ASTERISK-16694 and ASTERISK-16668), which go away after the cleanup (ASTERISK-16694) replacing the proprietary toneburst code with ast_playtones_ functions, so the fix from ASTERISK-19435 is no longer necessary.
The new functionality from ASTERISK-20158 is a bugfix on my opinion, because 'we get stuck on the alarm receiver app until it times out'
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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;">Compile test only</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-16668">ASTERISK-16668</a>,
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-16694">ASTERISK-16694</a>,
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-18417">ASTERISK-18417</a>,
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-19435">ASTERISK-19435</a>,
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-20157">ASTERISK-20157</a>,
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-20158">ASTERISK-20158</a>,
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-20224">ASTERISK-20224</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs </h1>
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<li>/trunk/apps/app_alarmreceiver.c <span style="color: grey">(370760)</span></li>
</ul><p><a href="https://reviewboard.asterisk.org/r/2075/diff/" style="margin-left: 3em;">View Diff</a></p>
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