std::basic_streambuf::pubseekoff,(3)

NAME
std::basic_streambuf::pubseekoff, - std::basic_streambuf::pubseekoff,

Synopsis
   pos_type pubseekoff( off_type off, std::ios_base::seekdir dir,
                        std::ios_base::openmode which = ios_base::in | (1)
   ios_base::out );
   protected:
   virtual pos_type seekoff( off_type off, std::ios_base::seekdir dir, (2)
                        std::ios_base::openmode which = ios_base::in |
   ios_base::out );
   Sets the position indicator of the input and/or output sequence relative to some
   other position.
   1) Calls seekoff(off, dir, which) of the most derived class.
   2) The base class version of this function has no effect. The derived classes may
   override this function to allow relative positioning of the position indicator.

Parameters
   off - relative position to set the position indicator to.
           defines base position to apply the relative offset to. It can be one of the
           following constants:
   dir - Constant Explanation
           beg the beginning of a stream
           end the ending of a stream
           cur the current position of stream position indicator
           defines which of the input and/or output sequences to affect. It can be one
           or a combination of the following constants:
   which -
           Constant Explanation
           in affect the input sequence
           out affect the output sequence

Note
   Not all combinations of parameters may be valid, see the derived versions of seekoff
   for details.

Return value
   1) The return value of seekoff(off, dir, which)
   2) The resulting absolute position as defined by the position indicator. The base
   class version returns pos_type(off_type(-1)).

Example
    This section is incomplete
    Reason: no example
   Defect reports
   The following behavior-changing defect reports were applied retroactively to
   previously published C++ standards.
     DR Applied to Behavior as published Correct behavior
                     the base class version of seekoff
   LWG 55 C++98 returned returns pos_type(off_type(-1))
                     an undefined invalid stream
                     position

See also
   pubseekpos invokes seekpos()
              (public member function)
   seekoff repositions the file position, using relative addressing
   [virtual] (virtual protected member function of std::basic_filebuf<CharT,Traits>)
              repositions the next pointer in the input sequence, output sequence, or
   seekoff both, using relative addressing
   [virtual] (virtual protected member function of
              std::basic_stringbuf<CharT,Traits,Allocator>)
   seekoff repositions the next pointer in the input sequence, output sequence, or
   [virtual] both, using relative addressing
              (virtual protected member function of std::strstreambuf)

Category:
     * Todo no example