inline stream_offset position_to_offset(std::streampos pos)
{
// use implementation-specific member function get_fpos_t().
return fpos_t_to_offset(pos.get_fpos_t()) +
stream_offset(std::streamoff(pos)) -
stream_offset(std::streamoff(pos.get_fpos_t()));
}
// Extracts the member _Fpos from a std::fpos
inline std::fpos_t streampos_to_fpos_t(std::streampos pos)
{
# if defined (_CPPLIB_VER) || defined(__IBMCPP__)
return pos.seekpos();
# else
return pos.get_fpos_t();
# endif
}
inline OSGA_Archive::pos_type ARCHIVE_POS( const std::streampos & pos )
{
#if defined(_CPPLIB_VER)//newer Dinkumware(eg: one included with VC++ 2003,2005)
fpos_t position = pos.seekpos();
#else // older Dinkumware (eg: one included in Win Server 2003 Platform SDK )
fpos_t position = pos.get_fpos_t();
#endif
std::streamoff offset = pos.operator std::streamoff( ) - _FPOSOFF( position );
return OSGA_Archive::pos_type( position + offset );
}