encoding crashes on SunOS due to improper use of `qsort'
I just tracked down and fixed a bug on SunOS where each and every attempt to oggencode a wave-file crashed. Backtrace shows the crash to occur at psy.c:_vp_noise_normalize_sort, at the call to `qsort', within the callback `apsort'. qsort was called with following args: qsort ((float **) 0xffbfefb8, 8, 4, apsort) apsort was called with following args: apsort (a=0xffbfefb4, b=0xffbfefbc) As one can see 0xffbf4fb4<0xffbfefb8, a array underrun occured. A description of what seems to be the same problem dates back to 1999: http://www.geocrawler.com/mail/msg.php3?msg_id=1607386&list=117. The problem seems to be the "misuse" of qsort, validating the specification: `apsort' returns `-1' even for equal values. A patch that makes it return `0' for equals fixes the problem. Patch at: http://user.cs.tu-berlin.de/~dvdkhlng/bugfix-qsort-20031103.diff Some more info: uname -a SunOS siesta 5.9 Generic_112233-08 sun4u sparc SUNW,Ultra-4 gcc --version gcc (GCC) 3.3.1 ~/bin/oggenc --version OggEnc v1.0 (libvorbis 1.0) Oggenc also crashed when I tried to run it about half a year ago on an earlier version of SunOS, here at my university. I didn't do any debugging back then. Could it be, that this bug affects libvorbis on *all* SunOS installations? David Kuehling
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