[Boost-bugs] [Boost C++ Libraries] #9749: bzip2_decompressor input filter gives data_error_magic

Subject: [Boost-bugs] [Boost C++ Libraries] #9749: bzip2_decompressor input filter gives data_error_magic
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-03-06 20:11:05

#9749: bzip2_decompressor input filter gives data_error_magic
-------------------------------------------------+-------------------------
 Reporter:  Balazs Andor Zalanyi                 |      Owner:  turkanis
  <zalanyi.balazs@…>                             |     Status:  new
     Type:  Bugs                                 |  Component:  iostreams
Milestone:  To Be Determined                     |   Severity:  Problem
  Version:  Boost 1.55.0                         |
 Keywords:  bzip2_decompressor                   |
-------------------------------------------------+-------------------------
 The bzip2_decompressor input filter is not able to read some bz2 files
 properly. It can read only the first few lines of the file then terminates
 with data_error_magic (BZ_DATA_ERROR_MAGIC in bzlib.h).

 After examining the problematic bz2 files I noticed that the first
 compressed stream is much shorter (536 bytes long) than the following
 streams. Debugging lead me to the conclusion that the simmetric_filter
 class's read method fills the buffer with new data even when the buffer
 hasn't been consumed completely. With the proposed solution below the
 files can be read to the end without further problems.

 The original code segment:

 {{{
 if (status == f_good)
   status = fill(src);
 }}}

 The proposed modification:

 {{{
 if (status == f_good && buf.ptr() == buf.eptr())
   status = fill(src);
 }}}

 Could someone please make this modification?
 Regards,
   Balazs

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9749>
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