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R. Belmont Cuckoo for IGAvania Reged: 09/21/03 Posts: 9716 Loc: ECV-197 The Orville Send PM Re: bug: chdman output depends on system qsort() implementation 06/16/12 03:56 PM Reply > Hi, > > trying to rebuild the 0.146 CHD set on Unix to avoid re-downloading, I found that the > Huffman compressor (src/lib/util/huffman.c) depends on an exact behavior of the > external qsort() function. Because Quicksort is not a stable sort and the node > weights which are compared can be the same for different node entries, output of > Quicksort is not unambiguously defined. > > This makes chdman produce different outputs on different operating systems. AFAIK Huffman was used for v4 CHDs and those produced the same output on different operating systems. Are you sure this is actually the problem - ie, you've dumped qsort() output from a CHDMAN run on Windows and Linux?

Entire thread Subject Posted by Posted on bug: chdman output depends on system qsort() implementation jmak 06/16/12 12:55 PM Re: bug: chdman output depends on system qsort() implementation R. Belmont  06/16/12 03:56 PM Re: bug: chdman output depends on system qsort() implementation krick  06/16/12 04:16 PM Re: bug: chdman output depends on system qsort() implementation R. Belmont  06/16/12 05:50 PM Re: bug: chdman output depends on system qsort() implementation krick  06/16/12 06:28 PM Re: bug: chdman output depends on system qsort() implementation R. Belmont  06/16/12 06:39 PM Re: bug: chdman output depends on system qsort() implementation italie  06/16/12 08:38 PM Re: bug: chdman output depends on system qsort() implementation jmak  06/16/12 08:22 PM Re: bug: chdman output depends on system qsort() implementation krick  06/17/12 07:38 PM Re: bug: chdman output depends on system qsort() implementation jmak  06/17/12 07:44 PM Re: bug: chdman output depends on system qsort() implementation R. Belmont  06/17/12 10:13 PM Re: bug: chdman output depends on system qsort() implementation AaronGiles  06/17/12 11:37 PM Re: bug: chdman output depends on system qsort() implementation krick  06/18/12 04:08 AM Re: bug: chdman output depends on system qsort() implementation R. Belmont  06/16/12 10:13 PM Re: bug: chdman output depends on system qsort() implementation jmak  06/17/12 06:47 PM Re: bug: chdman output depends on system qsort() implementation jmak  06/17/12 06:58 PM Re: bug: chdman output depends on system qsort() implementation R. Belmont  06/17/12 10:00 PM Re: bug: chdman output depends on system qsort() implementation jmak  06/19/12 09:30 PM Re: bug: chdman output depends on system qsort() implementation AaronGiles  06/17/12 02:09 AM Re: bug: chdman output depends on system qsort() implementation Tafoid  06/16/12 09:06 PM Re: bug: chdman output depends on system qsort() implementation krick  06/16/12 08:10 PM Re: bug: chdman output depends on system qsort() implementation jmak  06/16/12 08:33 PM

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