Howdy HDF5 Folk!
I have a HDF5 question.
I just switched to a new, faster, computer, and when I compile my
usual set of HDF5 "tests," I get some new behavior.
(I have tests in quotes because I'm not really trying to test HDF5,
just exercising it in a way similar to that which netCDF-4 does -
more of a sanity check than a set of tests).
Anyway, the program is appended below. What happens is that I create a
VLEN of base type NC_INT. Then I check the size of the VLEN type, and
it has been, until today, 8. (Is this 4 bytes each for the two fields
in hvl_t?)
Now, when I run this program, I get a size of 16 instead of 8.
What's up with that, I wonder?
Here's my new system name info, in case it helps:
Linux shecky.unidata.ucar.edu 2.6.12-1.1398_FC4smp #1 SMP Fri Jul 15
01:05:24 EDT 2005 x86_64 x86_64 x86_64 GNU/Linux
It does seem to imply some 64-bit stuff going on...
Any thoughts or suggestions would be most welcome.
Ed
int
main()
{
hid_t fileid, grpid, spaceid, typeid, attid;
hsize_t dims[1] = {DIM1_LEN};
hvl_t data[DIM1_LEN];
int *phoney;
int i, j;
size_t size;
/* Create some phoney data, an array of struct s1, which holds a
* pointer to a variable length array of int. */
for (i=0; i<DIM1_LEN; i++)
{
if (!(phoney = malloc(sizeof(int) * i+1)))
return NC_ENOMEM;
for (j=0; j<i+1; j++)
phoney[j] = -99;
data[i].p = phoney;
data[i].len = i+1;
}
printf("*** Checking simple HDF5 variable length types...");
/* Open file. */
if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT,
H5P_DEFAULT)) < 0) ERR;
if ((grpid = H5Gcreate(fileid, "grp1", 0)) < 0) ERR;
/* Create VLEN type. */
if ((typeid = H5Tvlen_create(H5T_NATIVE_INT)) < 0) ERR;
/* Although it's a vlen of ints, the size is rouned up to 8. */
if (!(size = H5Tget_size(typeid))) ERR;
if (size != 8) ERR;
/* Write an attribute of this vlen type. */
if ((spaceid = H5Screate_simple(1, dims, NULL)) < 0) ERR;
if ((attid = H5Acreate(grpid, ATT_NAME, typeid, spaceid,
H5P_DEFAULT)) < 0) ERR;
if (H5Awrite(attid, typeid, data) < 0) ERR;
if (H5Aclose(attid) < 0) ERR;
if (H5Tclose(typeid) < 0) ERR;
if (H5Gclose(grpid) < 0) ERR;
if (H5Fclose(fileid) < 0) ERR;
SUMMARIZE_ERR;
/* Print out our number of errors, if any, and exit badly. */
if (total_err)
{
printf("%d errors detected! Sorry!\n", total_err);
return 2;
}
printf("*** Tests successful!\n");
return 0;
}
--
Ed Hartnett -- ed@xxxxxxxxxxxxxxxx
