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)