The line
log_finer("Random bytes: %s", rand);
tries to print "rand" as if it were a null-terminated string, which it
isn't.
Anyway, since rand might contain non-printable characters, a better
method of printing would be:
log_finer("Random bytes: %0X %0X %0X %0X", rand[0], rand[1],
rand[2], rand[3] );
Regards,
Thilo Stapff
Axton wrote:
I know this is not the right forum, but you are the people I know. I
am working on an arfilter plug-in and have a question about C. The
plug-in I am writing randomly returns true or false based on a
probability (e.g., 1 in 10 chance T is returned).
The output from the plug-in shows the following:
<ARSWIKI.ARF.PRNG> <INFO> ARFilterApiCall called by user Demo
<ARSWIKI.ARF.PRNG> <FINER> Random bytes: i{¤ïÓÅ
<ARSWIKI.ARF.PRNG> <FINEST> character 0:
<ARSWIKI.ARF.PRNG> <FINER> int val of char 0: 134
<ARSWIKI.ARF.PRNG> <FINEST> bit offset: 0
<ARSWIKI.ARF.PRNG> <FINEST> after bit offset: 134
<ARSWIKI.ARF.PRNG> <FINEST> character 1: i
<ARSWIKI.ARF.PRNG> <FINER> int val of char 1: 105
<ARSWIKI.ARF.PRNG> <FINEST> bit offset: 8
<ARSWIKI.ARF.PRNG> <FINEST> after bit offset: 26880
<ARSWIKI.ARF.PRNG> <FINEST> character 2: {
<ARSWIKI.ARF.PRNG> <FINER> int val of char 2: 123
<ARSWIKI.ARF.PRNG> <FINEST> bit offset: 16
<ARSWIKI.ARF.PRNG> <FINEST> after bit offset: 8060928
<ARSWIKI.ARF.PRNG> <FINEST> character 3: ¤
<ARSWIKI.ARF.PRNG> <FINER> int val of char 3: 164
<ARSWIKI.ARF.PRNG> <FINEST> bit offset: 24
<ARSWIKI.ARF.PRNG> <FINEST> after bit offset: 2751463424
<ARSWIKI.ARF.PRNG> <FINE> Random 32-bit int: 2894948742
<ARSWIKI.ARF.PRNG> <INFO> Received value: 2
<ARSWIKI.ARF.PRNG> <INFO> Return Value: 1
The Random bytes line should contain 4 bytes of data, but for some
reason it returns between 4 and 8 bytes.
The sources that retrive and log the value are available at:
http://arswiki.org/projects/arfprng/browser/trunk/lib/arfprng.c#L241
The program seems to work fine, but it worries me that I seem to be
reading memory I shouldn't be. Any help is appreciated.
fwiw, the plug-in functions properly on linux, though there are a few
things I need to clean up before I consider it production worthy
(e.g., handling text values, handling zero as an input value, breaking
the code into functions, etc.).
Main Page: http://arswiki.org/projects/arfprng
As a partial side note, I installed the Doxygen plug-in for Trac; the
doxygen docs are available within the project web page.
As another side note; there seem to be some undocumented functions
available that are exposed through ARPluginSetProperties:
AR_PLUGIN_PROP_LOG_FUNCTION
AR_PLUGIN_PROP_INSTALL_DIR
AR_PLUGIN_PROP_CONFIG_FILE
AR_PLUGIN_PROP_GETUSER_FUNCTION
AR_PLUGIN_PROP_GETAUTHSTRING_FUNCTION
AR_PLUGIN_PROP_GETUSERAUTHINFO_FUNCTION
AR_PLUGIN_PROP_REGISTERSIGNALHANDLER_FUNCTION
AR_PLUGIN_PROP_INITTLS_FUNCTION
Wondering if anyone had experimented with these and could share their comments.
Axton Grams
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