Re: [Boost-users] [iostream] gzip filter buggy on windows

Subject: Re: [Boost-users] [iostream] gzip filter buggy on windows
From: Bo Jensen (jensen.bo_at_[hidden])
Date: 2011-04-28 08:41:16

On Thu, Apr 28, 2011 at 12:29 PM, Anders Knudby <knudby_at_[hidden]> wrote:
> On Thu, Apr 28, 2011 at 8:06 AM, Bo Jensen <jensen.bo_at_[hidden]> wrote:
>>
>> In my quest of making gzip work for my application on windows, I found
>> the following bug :
>>
>> int main(int argc, char *argv[])
>> {
>>  std::ofstream strm("test.gz");
>>
>>  boost::iostreams::filtering_ostream  sink;
>>
>>  /* Push gzip compressor */
>>  sink.push(boost::iostreams::gzip_compressor());
>>
>>  /* Push file writer */
>>  sink.push(strm);
>>
>>  #if 0
>>  /* This does not work */
>>  sink <<"  OBJ   N"<< std::endl;
>>  #else
>>  /* This works */
>>  sink <<"  OBJ N"<< std::endl;
>>  #endif
>> }
>>
>>
>> The first string results in a invalid gzip file i.e invalid compressed
>> data--length error. I am aware this might be a bug in zib lib. It
>> works on without any problems on linux.
>>
>> Does anyone use gzip on windows on a regular basis ?
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users_at_[hidden]
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>
> Hi Bo, I have recently tried getting boost/gzip to work on Windows (x86) and
> also run into some weird behaviour. It is chronicled in two recent posts,
> "Read/write with gzip" and "Writing large binary files with boost gzip". I
> can't say for sure that all my problems have been Windows issues, but others
> have successfully run some of my code on Linux when I couldn't get it to
> behave.
>
> Anders

Yes, after some tweaks with flushing it works absolutely fine for me
on linux. Windows on the other hand show some strange stuff like the
one I mention. I tried to upgrade from zlib 1.2.4 to zlib 1.2.5, but
can not make it compile with msvc-10. What version of zlib do you use
? Compiler ?

>
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