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Full Discussion: Functions defined in header / cpp file behaves different
Homework and Emergencies Emergency UNIX and Linux Support Functions defined in header / cpp file behaves different Post 302448930 by uunniixx on Friday 27th of August 2010 12:27:23 PM
Old 08-27-2010
Functions defined in header / cpp file behaves different
File: A.h

Code:
class A
{
  public:
  struct x X;
  int show()
  {
    x.member_variable ? 0: -1;
  }
};

Now if A.cpp is complied which includes A.h (which is actually in a huge project space) we see that x.member_variable value is not as expected. But if remove the show() method and place it in A.cpp the code behaves fine - meaning that x.member_variable value is correct.

How such a thing may happen - one thing we saw from objdump is that if the function is defined in A.h the the method is treated as inline function which otherwise is not if defined in A.cpp?

How the code can behave differently altogether?
Last edited by Scott; 08-27-2010 at 03:13 PM.. Reason: Added code tags
 

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LEARN ABOUT DEBIAN

zipios_zipoutputstream

zipios::ZipOutputStream(3)				     Library Functions Manual					zipios::ZipOutputStream(3)

NAME

       zipios::ZipOutputStream -

SYNOPSIS

       #include <zipoutputstream.h>

   Public Member Functions
       ZipOutputStream (std::ostream &os)
	   ZipOutputStream constructor.
       ZipOutputStream (const std::string &filename)
	   ZipOutputStream constructor.
       void closeEntry ()
	   Closes the current entry updates its header with the relevant size information and positions the stream write pointer for the next
	   entry header.
       void close ()
	   Calls finish and if the ZipOutputStream was created with a filename as a parameter that file is closed as well.
       void finish ()
	   Closes the current entry (if one is open), then writes the Zip Central Directory Structure closing the ZipOutputStream.
       void putNextEntry (const ZipCDirEntry &entry)
       void putNextEntry (const std::string &entryName)
       void setComment (const std::string &comment)
	   Sets the global comment for the Zip archive.
       void setLevel (int level)
	   Sets the compression level to be used for subsequent entries.
       void setMethod (StorageMethod method)
	   Sets the compression method to be used.
       virtual ~ZipOutputStream ()
	   Destructor.

Detailed Description
	ZipOutputStream is an ostream that writes the output to a zip file. The interface approximates the interface of the Java ZipOutputStream.

       Definition at line 18 of file zipoutputstream.h.

Constructor &; Destructor Documentation
   zipios::ZipOutputStream::ZipOutputStream (std::ostream &os) [explicit]
       ZipOutputStream constructor. Parameters:
	   os ostream to which the compressed zip archive is written.
	   pos position to reposition the ostream to before reading.

       Definition at line 13 of file zipoutputstream.cpp.

   zipios::ZipOutputStream::ZipOutputStream (const std::string &filename) [explicit]
       ZipOutputStream constructor. filename to write the zip archive to.

       Definition at line 24 of file zipoutputstream.cpp.

   zipios::ZipOutputStream::~ZipOutputStream () [virtual]
       Destructor.

       Definition at line 74 of file zipoutputstream.cpp.

Member Function Documentation
   void zipios::ZipOutputStream::close ()
       Calls finish and if the ZipOutputStream was created with a filename as a parameter that file is closed as well. If the ZipOutputStream was
       created with an ostream as its first parameter nothing but the call to finish happens.

       Definition at line 38 of file zipoutputstream.cpp.

   void zipios::ZipOutputStream::closeEntry ()
       Closes the current entry updates its header with the relevant size information and positions the stream write pointer for the next entry
       header. Puts the stream in EOF state. Call putNextEntry() to clear the EOF stream state flag.

       Definition at line 33 of file zipoutputstream.cpp.

   void zipios::ZipOutputStream::finish ()
       Closes the current entry (if one is open), then writes the Zip Central Directory Structure closing the ZipOutputStream. The output stream
       that the zip archive is being written to is not closed.

       Definition at line 45 of file zipoutputstream.cpp.

   void zipios::ZipOutputStream::putNextEntry (const ZipCDirEntry &entry) Begins writing the next entry.
       Definition at line 50 of file zipoutputstream.cpp.

   void zipios::ZipOutputStream::putNextEntry (const std::string &entryName) Begins writing the next entry.
       Definition at line 54 of file zipoutputstream.cpp.

   void zipios::ZipOutputStream::setComment (const std::string &comment)
       Sets the global comment for the Zip archive.

       Definition at line 59 of file zipoutputstream.cpp.

   void zipios::ZipOutputStream::setLevel (intlevel)
       Sets the compression level to be used for subsequent entries.

       Definition at line 64 of file zipoutputstream.cpp.

   void zipios::ZipOutputStream::setMethod (StorageMethodmethod)
       Sets the compression method to be used. only STORED and DEFLATED are supported.

       Definition at line 69 of file zipoutputstream.cpp.

Author
       Generated automatically by Doxygen for Zipios++ from the source code.

Zipios++							  Mon Oct 10 2011					zipios::ZipOutputStream(3)
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