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/*
* Copyright (c) 2001-2002 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
*
* $Id: pack.c,v 6.6 2002/12/11 19:15:13 jsquyres Exp $
*
* Function: - pack from data buffer
* Accepts: - data buffer
* - data count
* - data type
* - packing buffer
* - packing buffer size
* - packing buffer position (in-out)
* - communicator
* Returns: - MPI_SUCCESS or error code
*/
#include <blktype.h>
#include <mpi.h>
#include <mpisys.h>
/*@
MPI_Pack - Packs a datatype into contiguous memory
Input Parameters:
+ buf - input buffer start (choice)
. count - number of input data items (integer)
. dtype - datatype of each input data item (handle)
. packsize - output buffer size, in bytes (integer)
- comm - communicator for packed message (handle)
Input/Output Parameter:
. packpos - current position in buffer, in bytes (integer)
Output Parameter:
. packbuf - output buffer start (choice)
.N fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
.N MPI_ERR_TYPE
.N MPI_ERR_COUNT
.N MPI_ERR_ARG
.N MPI_ERR_BUFFER
.N MPI_ERR_TRUNCATE
.seealso: MPI_Pack_size, MPI_Unpack
.N ACK
@*/
int MPI_Pack(void *buf, int count, MPI_Datatype dtype,
void *packbuf, int packsize, int *packpos,
MPI_Comm comm)
{
int size;
char *p;
lam_initerr();
lam_setfunc(BLKMPIPACK);
/*
* Check the arguments.
*/
if (comm == MPI_COMM_NULL) {
return(lam_errfunc(MPI_COMM_WORLD,
BLKMPIPACK, lam_mkerr(MPI_ERR_COMM, EINVAL)));
}
if (dtype == MPI_DATATYPE_NULL || (!dtype->dt_commit)) {
return(lam_errfunc(comm,
BLKMPIPACK, lam_mkerr(MPI_ERR_TYPE, EINVAL)));
}
if (count < 0) {
return(lam_errfunc(comm,
BLKMPIPACK, lam_mkerr(MPI_ERR_COUNT, EINVAL)));
}
if ((packsize < 0) || (packpos == 0)) {
return(lam_errfunc(comm,
BLKMPIPACK, lam_mkerr(MPI_ERR_ARG, EINVAL)));
}
if ((*packpos < 0) || ((*packpos >= packsize) && (packsize > 0))) {
return(lam_errfunc(comm,
BLKMPIPACK, lam_mkerr(MPI_ERR_ARG, EINVAL)));
}
if ((packsize > 0) && (packbuf == 0)) {
return(lam_errfunc(comm,
BLKMPIPACK, lam_mkerr(MPI_ERR_BUFFER, EINVAL)));
}
/*
* Pack the data.
*/
p = ((char *) packbuf) + *packpos;
size = packsize - *packpos;
size = lam_pack((char *) buf, count, dtype, p, size);
if (size < 0) {
return(lam_errfunc(comm,
BLKMPIPACK, lam_mkerr(MPI_ERR_TRUNCATE, EIO)));
}
*packpos += size;
lam_resetfunc(BLKMPIPACK);
return(MPI_SUCCESS);
}
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