APAR status

• Closed as user error.

Error description

• PROBLEM DESCRIPTION:
  --------------------
  Problems with the streaming reading the hex string (with 0x as p
  converting to an interger.
  
  - The character "0x0A" from stream buffer should be converted to
  if the hex flag not set thus printing a corresponding decimal
  value of 10.
  - The result from the test case printed 0 instead.
  - I suspect that the compiler is not recognizing the prefix "0x"
  is only converting the characters before "x" (since x is not a v
  decimal digit).
  - This is not working as the documentation states it should.
  - Summarizing from the compiler online documentation:
  If the hex flag is not set, the character conversion is done acc
  to the C++ lexical convention. i.e. If these characters begins w
  either "0x" or "0X", the subsequent characters are converted to
  hexadecimal value.
  ENVIRONMENT:
  ------------
  AIX433
  vacpp v5.03
  TESTCASE:
  ---------
  // test2.C
  //
  // INCLUDES
  //
  #include <iostream.h>
  #include <strstream.h>
  int main()
  {
  int childVal;
  char* value("01x0A");
  
  cout << "value: " << value << endl;
   // We have a hex value
   istrstream valBuf(value);
  valBuf >> childVal;
  cout << "ChildVal: " << chi
  }
  COMPILE COMMAND:
  ----------------
  xlC test2.C
  EXPECTED RESULTS:
  -----------------
  value: 0x0A
  ChildVal: 10
  ACTUAL RESULTS:
  ---------------
  value: 0x0A
  ChildVal: 0
  

Local fix

• - Remove the "0x" prefix and use the hex manipulator.
  e.g. char* value("0A");
  valBuf >> hex >> childVal
  Please see test case.
  

Problem summary

Problem conclusion

Temporary fix

Comments

• The behavior described in the APAR
  occurs only when no format flag is set.
  This condition can
  be produced by clearing the ios::basefield as in the following
  exampl
  
  #include <iostream.h>
  #include <strstream.h>
  
  int main()
  {
    int childVal;
    char* value("0x0A");
  
    cout << "value: " << value << endl;
  
    // We have a hex value
    istrstream valBuf(value);
  
    // This cleares format flags
    valBuf.setf(0, ios::basefield);
  
    valBuf >> childVal;
    cout << "ChildVal: " << childVal << endl;
  }
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  VA C++ PROF FOR

• Fixed component ID

  5765E2600

Applicable component levels

IBM, the IBM logo and ibm.com are trademarks of International Business Machines Corp., registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the Web at "Copyright and trademark information" at www.ibm.com/legal/copytrade.shtml.

Product categories:

Software

Software Development

Analysis, Modeling, Design & Construction

VisualAge C++

Compiler

Software version:

500

Reference #:

IY32387

IBM Group:

Software Group

Modified date:

2007-11-06