int MPIU_read_external32_conversion_fn(void *userbuf, MPI_Datatype datatype,
int count, void *filebuf)
{
int position_i = 0;
MPI_Aint position = 0;
MPI_Aint bytes = 0;
int mpi_errno = MPI_SUCCESS;
int is_contig = 0;
ADIOI_Datatype_iscontig(datatype, &is_contig);
mpi_errno = MPI_Pack_external_size("external32", count, datatype, &bytes);
if (mpi_errno != MPI_SUCCESS)
goto fn_exit;
if (is_contig)
{
mpi_errno = MPI_Unpack_external("external32", filebuf, bytes,
&position, userbuf, count, datatype);
if (mpi_errno != MPI_SUCCESS)
goto fn_exit;
}
else
{
void *tmp_buf = NULL;
tmp_buf = ADIOI_Malloc(bytes);
if (!tmp_buf)
{
mpi_errno = MPI_ERR_NO_MEM;
goto fn_exit;
}
mpi_errno = MPI_Pack(filebuf, count, datatype, tmp_buf, bytes,
&position_i, MPI_COMM_WORLD);
if (mpi_errno != MPI_SUCCESS)
{
ADIOI_Free(tmp_buf);
goto fn_exit;
}
mpi_errno = MPI_Unpack_external("external32", tmp_buf, bytes,
&position, userbuf, count, datatype);
if (mpi_errno != MPI_SUCCESS)
{
ADIOI_Free(tmp_buf);
goto fn_exit;
}
ADIOI_Free(tmp_buf);
}
fn_exit:
return mpi_errno;
}
int main(int argc, char *argv[])
{
/* Variable declarations */
MPI_Datatype oneslice, twoslice, threeslice;
int errs = 0;
MPI_Aint sizeofint, bufsize, position;
void *buffer;
int i, j, k;
/* Initialize a to some known values. */
for (i = 0; i < 100; i++) {
for (j = 0; j < 100; j++) {
for (k = 0; k < 100; k++) {
a[i][j][k] = i * 1000000 + j * 1000 + k;
}
}
}
/* Initialize MPI */
MPI_Init(&argc, &argv);
MPI_Type_extent(MPI_INT, &sizeofint);
parse_args(argc, argv);
/* Create data types. */
/* NOTE: This differs from the way that it's done on the sheet. */
/* On the sheet, the slice is a[0, 2, 4, ..., 16][2-10][1-9]. */
/* Below, the slice is a[0-8][2-10][1, 3, 5, ..., 17]. */
MPI_Type_vector(9, 1, 2, MPI_INT, &oneslice);
MPI_Type_hvector(9, 1, 100 * sizeofint, oneslice, &twoslice);
MPI_Type_hvector(9, 1, 100 * 100 * sizeofint, twoslice, &threeslice);
MPI_Type_commit(&threeslice);
/* Pack it into a buffer. */
position = 0;
/* MPI_Pack_size(1, threeslice, MPI_COMM_WORLD, &bufsize); */
MPI_Pack_external_size((char *) "external32", 1, threeslice, &bufsize);
if (bufsize != 2916) {
fprintf(stderr, " Error on pack size! Got %d; expecting %d\n", (int) bufsize, 2916);
}
buffer = (void *) malloc((unsigned) bufsize);
/* -1 to indices on sheet to compensate for Fortran --> C */
MPI_Pack_external((char *) "external32",
&(a[0][2][1]), 1, threeslice, buffer, bufsize, &position);
/* Unpack the buffer into e. */
position = 0;
MPI_Unpack_external((char *) "external32", buffer, bufsize, &position, e, 9 * 9 * 9, MPI_INT);
/* Display errors, if any. */
for (i = 0; i < 9; i++) {
for (j = 0; j < 9; j++) {
for (k = 0; k < 9; k++) {
/* The truncation in integer division makes this safe. */
if (e[i][j][k] != a[i][j + 2][k * 2 + 1]) {
errs++;
if (verbose) {
printf("Error in location %d x %d x %d: %d, should be %d.\n",
i, j, k, e[i][j][k], a[i][j + 2][k * 2 + 1]);
}
}
}
}
}
/* Release memory. */
free(buffer);
if (errs) {
fprintf(stderr, "Found %d errors\n", errs);
}
else {
printf(" No Errors\n");
}
MPI_Type_free(&oneslice);
MPI_Type_free(&twoslice);
MPI_Type_free(&threeslice);
MPI_Finalize();
return 0;
}
