Hi Binh-Minh,
Thanks for your response. The ::FloatType( const PredType& pred_type ) works for me. However, it's still not clear to me why the flag 'predefined' is removed from constructor H5::DataType(hid_t existing_id, bool predefined) without extra code to handle the predefined datatype.
Cheers,
Zane
···
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Message: 2
Date: Wed, 4 Jan 2012 11:35:58 -0500
From: "Binh-Minh Ribler" <bmribler@hdfgroup.org>
To: "'HDF Users Discussion List'" <hdf-forum@hdfgroup.org>
Subject: Re: [Hdf-forum] Construct H5::DataType with predefined
datatype in C++1.8.6
Message-ID: <023e01cccafe$f1f43880$0c00000a@lap>
Content-Type: text/plain; charset="us-ascii"
Hi Zane,
The predefined type should be in the form of H5::PredType::NATIVE_FLOAT, not
H5::H5T_NATIVE_FLOAT. I'm surprised it passed the compilation. Does
FloatType::FloatType( const PredType& pred_type ) work for you?
Binh-Minh
_____
From: hdf-forum-bounces@hdfgroup.org [mailto:hdf-forum-bounces@hdfgroup.org]
On Behalf Of Zhengying Wang
Sent: Wednesday, January 04, 2012 5:04 AM
To: 'hdf-forum@hdfgroup.org'
Subject: [Hdf-forum] Construct H5::DataType with predefined datatype in
C++1.8.6
Hi,
I'm in the process to upgrade our application from 1.6.5 to 1.8.6. I have
noticed the constructor of H5::DataType (hitd_t existing_id, bool
predefined) has changed to H5::DataType (hitd_t existing_id). The interface
changes do make sense from the point view of users, however I have problem
to create an object with the predefined datatype - Here is a very simple
example:
#include <H5cpp.h>
int main ()
{
H5::DataType (H5::H5T_NATIVE_FLOAT);
return 0;
}
The destructor complains with the following errors:
DataType::~DataType - H5Tclose failed
HDF5-DIAG: Error detected in HDF5 (1.8.6) thread 140429119538976:
#000: H5T.c line 1723 in H5Tclose(): immutable datatype
major: Invalid arguments to routine
minor: Bad value
DataType::~DataType - H5Tclose failed
I also tried to the following code:
#include <H5cpp.h>
int main ()
{
H5::DataType (H5::PredType::NATIVE_FLOAT);
return 0;
}
The code works for 1.8.6 but not 1.6.5 unfortunately.
Here are the errors when trying to insert the object to a compound datatype.
HDF5-DIAG: Error detected in HDF5 library version: 1.6.5 thread 3077396992.
Back trace follows.
#000: H5Tcompound.c line 351 in H5Tinsert(): not a datatype
major(01): Function arguments
minor(03): Inappropriate type
H5Tinsert failed
Could anyone please instruct a proper way to construct H5::DataType with the
predefined datatype? It'd be nice if the code can work in both 1.6.5 and
1.8.6.
Thanks,
Zane
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