[Boost-bugs] [Boost C++ Libraries] #5670: Construction from a character array leads to path with an embedded zero terminator

Subject: [Boost-bugs] [Boost C++ Libraries] #5670: Construction from a character array leads to path with an embedded zero terminator
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-07-05 10:49:11

#5670: Construction from a character array leads to path with an embedded zero
terminator
-----------------------------------------+----------------------------------
 Reporter:  davidjward30@…               |       Owner:  bemandawes
     Type:  Bugs                         |      Status:  new       
Milestone:  To Be Determined             |   Component:  filesystem
  Version:  Boost 1.44.0                 |    Severity:  Regression
 Keywords:  constructor character array  |  
-----------------------------------------+----------------------------------
 Boost filesystem v3.

 Demonstrated with an example:

 wchar_t filename[256];

 filename[0]=L'D';
 filename[1]=0;

 std::wstring s(filename);
 std::cout << "Length of s: " << s.length() << " "  << std::endl;

 boost::filesystem::path p2(filename);
 std::cout << "Length of p: " << p2.native().length() << std::endl;

 Displays:

 Length of s: 1
 Length of p: 255

 When initializing a std::wstring with a character array, the embedded zero
 terminator is taken in to account. However, with filesystem::path, the
 resulting path ends up longer than expected with  an embedded zero
 terminator.

 I would expect length of p to be 1 with the path ending at the first zero
 terminator.

 This bug leads to all sorts of hard to find bugs as many operations seem
 to work fine, but calling path::filename() results in an empty string.

 An obvious workaround is to do:

 boost::filesystem::path p2(&filename[0]);

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5670>
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