[Boost-bugs] [Boost C++ Libraries] #8745: stream operator << for number/cpp_int_backend with 8 bit or less precision not working

Subject: [Boost-bugs] [Boost C++ Libraries] #8745: stream operator << for number/cpp_int_backend with 8 bit or less precision not working
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-06-28 16:29:48

#8745: stream operator << for number/cpp_int_backend with 8 bit or less precision
not working
-------------------------------------------------+-------------------------
 Reporter:  neal.p.smith@…                       |      Owner:  johnmaddock
     Type:  Bugs                                 |     Status:  new
Milestone:  To Be Determined                     |  Component:
  Version:  Boost 1.53.0                         |  multiprecision
 Keywords:  multiprecision cpp_int_backend       |   Severity:  Problem
  stream                                         |
-------------------------------------------------+-------------------------
 for 8 bit or less numbers << with hex format sets characters to the
 numeric value of their digit rather than the ascii value.  ie if the
 character should be 'F' the returned value is 15 rather than the ASCII
 value for F.

     number<cpp_int_backend<7,   7, unsigned_magnitude, unchecked, void>>
 myNum07(   "0xF");
     number<cpp_int_backend<8,   8, unsigned_magnitude, unchecked, void>>
 myNum08(  "0x0F");
     number<cpp_int_backend<9,   9, unsigned_magnitude, unchecked, void>>
 myNum09(  "0x0F");
     number<cpp_int_backend<16, 16, unsigned_magnitude, unchecked, void>>
 myNum16("0x000F");

     char outBuf[1000];
     std::stringstream ss;
     ss << setfill('0');
     ss << "7 bit : " << std::setw(2) << std::hex << myNum07 << endl;
     ss << "8 bit : " << std::setw(2) << std::hex << myNum08 << endl;
     ss << "9 bit : " << std::setw(2) << std::hex << myNum09 << endl;
     ss << "16 bit: " << std::setw(2) << std::hex << myNum16 << endl;
     strncpy(outBuf, ss.str().c_str(), 999);
     printf("%s\n", outBuf);

 output is:
 ----------
 7 bit : 0☼
 8 bit : 0☼
 9 bit : 0f
 16 bit: 0f

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8745>
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