Re: [Boost-bugs] [Boost C++ Libraries] #3352: CRC not correctly computed on x64 during decompression of gzip archive

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #3352: CRC not correctly computed on x64 during decompression of gzip archive
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-08-18 17:44:29


#3352: CRC not correctly computed on x64 during decompression of gzip archive
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 Reporter: thomas.suckow@… | Owner: turkanis
     Type: Bugs | Status: new
Milestone: Boost 1.40.0 | Component: iostreams
  Version: Boost Development Trunk | Severity: Problem
 Keywords: x64 64bit gzip iostreams |
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Comment(by thomas.suckow@…):

 Line of fault is:

 crc_ += value << (offset_ * 8);

 in gzip.cpp

 When the shift results in a large negative value, the 32bit crc should
 roll over. But long on x64 is 64bit and the result is incorrect.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3352#comment:1>
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