Hi Gerd,
Thanks for replying. The header info for this dataset is:
GROUP "/" {
GROUP "Metadata" {
DATASET "datetime" {
DATATYPE H5T_STRING {
STRSIZE H5T_VARIABLE;
STRPAD H5T_STR_NULLTERM;
CSET H5T_CSET_ASCII;
CTYPE H5T_C_S1;
}
DATASPACE SCALAR
}
}
Many thanks
Adam
From: Hdf-forum [mailto:[email protected]] On Behalf Of Gerd
Heber
Sent: 09 November 2015 12:53
To: HDF Users Discussion List <[email protected]>
Subject: Re: [Hdf-forum] H5Dread
Adam, how are you? Can you send us the h5dump output from
the dataset you are trying to read? A small sample file would be
great, but just the header information should be sufficient (h5dump –H).
Thanks, G.
From: Hdf-forum [mailto:[email protected]] On Behalf Of Adam
Edwards
Sent: Friday, November 6, 2015 3:25 AM
To: [email protected]<mailto:[email protected]>
Subject: [Hdf-forum] H5Dread
Hello,
I am working with ILNumerics on use of their HDF5 wrapper in an x64 c#.NET
application. I have encountered an issue when trying to read a vlen string:
Basic code is:
datasetId = H5D.H5Dopen2 ( ds.File.ID, ds.Path, Constants.H5P_DEFAULT );
// prepare vlen data type (string)
memType = H5T.H5Tcopy ( H5T.H5T_C_S1 );
int err = H5T.H5Tset_size ( memType, unchecked ( ( uint ) -1 )
);
if ( err != 0 )
{
throw new ArgumentException ( "Unable to determine data
size" );
}
ILSize size = ds.Size;
// buffer for reading pointer(s) to the string(s)
IntPtr [] buffer = new IntPtr [size.NumberOfElements];
GCHandle h = GCHandle.Alloc ( buffer, GCHandleType.Pinned );
err = H5D.H5Dread ( datasetId, memType, H5S.ALL, H5S.ALL,
Constants.H5P_DEFAULT, h.AddrOfPinnedObject () );
h.Free ();
// now the _pointers_ to the strings should be in the buffer.
We need to copy / convert them to new strings on the managed heap.
ILArray<string> ret = ILMath.array<string> ( "", ds.Size );
int i = 0;
foreach ( var element in buffer )
{
ret [i++] = Marshal.PtrToStringAnsi ( element );
}
return ret;
When run on x86 it performs as expected, but on x64 we get a -1 error from the
Dread call with the following std output:
HDF5-DIAG: Error detected in HDF5 (1.8.9) thread 0:
#000: C:\autotest\HDF518ReleaseCMake\src\H5Dio.c line 174 in H5Dread(): can't
read data
major: Dataset
minor: Read failed
#001: C:\autotest\HDF518ReleaseCMake\src\H5Dio.c line 337 in H5D_read():
unable to set up type info
major: Dataset
minor: Unable to initialize object
#002: C:\autotest\HDF518ReleaseCMake\src\H5Dio.c line 838 in
H5D_typeinfo_init(): unable to convert between src and dest datatype
major: Dataset
minor: Feature is unsupported
#003: C:\autotest\HDF518ReleaseCMake\src\H5T.c line 4481 in H5T_path_find():
no appropriate function for conversion path
major: Datatype
minor: Unable to initialize object
The only difference between x86 and x64 I could find was the IntPtr size (4 & 8
respectively). The current build version being used is 1.8.9. Has this issue
been encountered before, and if so was it fixed in a later build?
Many Thanks for any guidance you can offer.
Adam Edwards | AP Sensing UK
Phone: +49-7031-309-6645 | Fax: +49-7031-309-6611 |
www.apsensing.com<http://www.apsensing.com/> |
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LinkedIn<http://www.linkedin.com/company/ap-sensing>
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