MPI_Pack_external

int MPI_Pack_external(char *, void *, int, MPI_Datatype, void *, MPI_Aint, MPI_Aint *);int MPI_Pack_external_size(char *, int, MPI_Datatype, MPI_Aint *);int MPI_Request_get_status(MPI_Request, int *, MPI_Status *);
Packs the message in the specified send buffer into the specified buffer space, using the external32 data format.