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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/4533/">https://reviewboard.asterisk.org/r/4533/</a>
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<p style="margin-top: 0;">On April 1st, 2015, 3:16 a.m. CEST, <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/4533/diff/7/?file=73369#file73369line174" style="color: black; font-weight: bold; text-decoration: underline;">/branches/13/funcs/func_curl.c</a>
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(Diff revision 7)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">ASTERISK_FILE_VERSION(__FILE__, "$Revision$")</pre></td>
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<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">174</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define CURLOPT_SPECIAL_HASHCOMPAT -500</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="c1"><span class="hl">//</span>#define CURLOPT_SPECIAL_HASHCOMPAT -500</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define CURLOPT_SPECIAL_HASHCOMPAT CURLOPT_SPECIAL_HASHCOMPAT</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;">Try defining this as:
#define CURLOPT_SPECIAL_HASHCOMPAT ((CURLoption) -500)
This should shut-up the compiler without changing the binary value.</pre>
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<p>On April 1st, 2015, 3:59 a.m. CEST, <b>Diederik de Groot</b> wrote:</p>
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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;">CurlOption is a positive enum though. So the warning about it not being allowed to be negative remains, won't it ?
BTW: I made a typo while changing this one
I was meaning to set it to:
#define CURLOPT_SPECIAL_HASHCOMPAT CURLOPT_LASTENTRY
Which is a legal value. Not really happy with this though.
Setting it to
#define CURLOPT_SPECIAL_HASHCOMPAT ((CURLoption) 500)
Might be an option, not sure if this is checked though.
This would require a little further source investigation.
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<p>On April 1st, 2015, 4:44 a.m. CEST, <b>rmudgett</b> wrote:</p>
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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;">The cast should shut the compiler up as you are telling the compiler to reinterpret the -500 to be a member of the enum. If not then it's another of those compilers that tenatiously guards their stupidity. Reinterpreting a negative number as an unsigned value results in a very large number on two's complement machines. Are there any modern machines that don't use two's complement?
Using CURLOPT_LASTENTRY should also work as a last resort since it has the down side of library updates adding new enum values and changing the last entry value.</pre>
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<p>On April 7th, 2015, 9:44 p.m. CEST, <b>rmudgett</b> wrote:</p>
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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;">This is the last issue I have with this patch.
I'd say ship it if clang is happy with my initial cast suggestion.</pre>
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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;">Will do !
clang is just fine with it.
does go against my grain a little, especially because we end up out of bounds of the CURLOPT_LASTENTRY, which could get checked at some time in the curl source code (if not already). Making the change though.</pre>
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<p>- Diederik</p>
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<p>On April 1st, 2015, 5:22 a.m. CEST, Diederik de Groot wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Diederik de Groot.</div>
<p style="color: grey;"><i>Updated April 1, 2015, 5:22 a.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-24917">ASTERISK-24917</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<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;">clang's static analyzer will throw quite a number warnings / errors during compilation, some of which can be very helpfull in finding corner-case bugs
clang compiler warning:-Wtautological-compare
Changes:
/branches/13/channels/pjsip/dialplan_functions.c:869
len is of type size_t, which is unsigned. It will not be able to hold a value < 0
/branches/13/funcs/func_curl.c:174
Not a 100% sure how to do this correctly. But assiging a negative value is problematic. Extending the enum in curl/curl.h is not possible either. I opted to use the enum last entry (CURL_LAST) which is currently not used for any thing. Another option would be to use one of the OBSOLETE VALUES like 16. Neither way is very nice though.
/branches/13/include/asterisk/app.h:988
Needed to convey the error state returned by res/res_stasis_recording.c:stasis_app_recording_if_exists_parse
/branches/13/include/asterisk/cel.h:77
Added to convey not-found or error state. Not sure which name would be prefered for such an enum value.
/branches/13/main/cel.c:536
Return actual enum instead of -1,l which can not be conveyed by this enum.
/branches/13/main/enum.c:260
dn_expand return signed int
/branches/13/main/event.c:202
enum type cannot be < 0
/branches/13/main/indications.c:362
tone_data.freq1 and freq2 are unsigned int's so no need to check if < 0. Not sure what should happend when freq1 / freq2 are 0 already... (needs recheck by source owner)
/branches/13/main/presencestate.c:293
Should use the actual enum value for INVALID State
/branches/13/main/security_events.c:432/890/1176/
enum event_type cannot be <0
/branches/13/main/udptl.c:365/649/661
encode_length returns and unsigned int, so checking if < 0 does not make sence. Not 100% if encode_length has side effects, so left the actual call the this function in place. (Needs to be rechecked by code-owner)
/branches/13/res/res_pjsip_exten_state.c:411
Used a temporary int variable to be able to check the return value from ast_hint_presence_state.. Not very nice, but did not want to change the signature of this function.
/branches/13/res/res_stasis_playback.c:634
operation is enum and cannot be < 0
/branches/13/res/res_stasis_recording.c:598/604
recording->state / operation is enum and cannot be < 0
/branches/13/res/res_security_log.c:992
enum event_type cannot be <0
use of ARRAY_IN_BOUNDS with enum results in tautological comparison for the lower limit which is always true.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/13/res/res_stasis_recording.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/res/res_stasis_playback.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/res/res_pjsip_exten_state.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/res/ari/resource_channels.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/res/ari/resource_bridges.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/main/udptl.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/main/security_events.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/main/presencestate.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/main/indications.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/main/event.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/main/enum.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/main/cel.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/main/app.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/include/asterisk/utils.h <span style="color: grey">(433444)</span></li>
<li>/branches/13/include/asterisk/logger.h <span style="color: grey">(433444)</span></li>
<li>/branches/13/include/asterisk/cel.h <span style="color: grey">(433444)</span></li>
<li>/branches/13/include/asterisk/app.h <span style="color: grey">(433444)</span></li>
<li>/branches/13/funcs/func_curl.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/channels/pjsip/dialplan_functions.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/channels/chan_skinny.c <span style="color: grey">(433444)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/4533/diff/" style="margin-left: 3em;">View Diff</a></p>
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