NAME

       MPI_Register_datarep -  Register functions for user-defined data  representations

SYNOPSIS

       int MPI_Register_datarep(ROMIO_CONST char *datarep,
                              MPI_Datarep_conversion_function *read_conversion_fn,
                              MPI_Datarep_conversion_function *write_conversion_fn,
                              MPI_Datarep_extent_function *dtype_file_extent_fn,
                              void *extra_state)

INPUT PARAMETERS

       datarep
              - data representation name (string)
       read_conversion_fn
              - function invoked to convert from file representation to native representation (function)
       write_conversion_fn
              - function invoked to convert from native representation to file representation (function)
       dtype_file_extent_fn
              - function invoked to get the exted of a datatype as represented in the file (function)
       extra_state
              - pointer to extra state that is passed to each of the three functions

NOTES

       This  function  allows the user to provide routines to convert data from an external representation, used
       within a file, and the native representation,  used  within  the  CPU.   There  is  one  predefined  data
       representation, external32 .  Please consult the MPI-2 standard for details on this function.

NOTES FOR FORTRAN

       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the
       end of the argument list.  ierr is an integer and has the same meaning as the return value of the routine
       in C.  In Fortran, MPI routines are subroutines, and are invoked with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

                                                    11/9/2015                            MPI_Register_datarep(3)