HDF5 1.8.9: H5F_ACC_CREAT

Hdf-forum archives
1

Dear all,

in the HDF5 version I am currently using (1.8.9) the flag

H5F_ACC_CREAT

is not working. An exception is thrown when I try to create a file like this:

H5::H5File H5file_ptr=newH5File("./test.h5",H5F_ACC_CREAT);

->

Exception at 0x761bc42d, code: 0xe06d7363: C++ exception, flags=0x1 (execution cannot be continued) (first chance) at c:\...\hdf5-1.8.9.tar\hdf5-1.8.9\hdf5-1.8.9\c++\src\h5file.cpp:121

refering to the following source code (h5file.cpp):

void H5File::p_get_file(const char* name, unsigned int flags, const FileCreatPropList& create_plist, const FileAccPropList& access_plist)
{
     // These bits only set for creation, so if any of them are set,
     // create the file.
     if( flags & (H5F_ACC_CREAT|H5F_ACC_EXCL|H5F_ACC_TRUNC|H5F_ACC_DEBUG))
     {
     hid_t create_plist_id = create_plist.getId();
     hid_t access_plist_id = access_plist.getId();
     id = H5Fcreate( name, flags, create_plist_id, access_plist_id );
     if( id < 0 ) // throw an exception when open/create fail
     {
         throw FileIException("H5File constructor", "H5Fcreate failed");
     }
     // Open the file if none of the bits above are set.
     else
     {
     hid_t access_plist_id = access_plist.getId();
     id = H5Fopen( name, flags, access_plist_id );
     if( id < 0 ) // throw an exception when open/create fail
     {
         throw FileIException("H5File constructor", "H5Fopen failed");
     }
}

A web search did not result in any information on if it has been solved or not in later releases.
Does anyone have some information on this ?

Furthermore, is my assumption correct, that this flag means:

Create/Openfile inRead/Writemodeandkeepfilecontentiffile already exists

?

Thank you

Best regards,

Florian

···

--
Mit freundlichen Grüßen
--
Dr.-Ing. Florian Hoffmann
inuTech GmbH Phone : +49-(0)911-323843-22
Fuerther Strasse 212 Fax : +49-(0)911-323843-43
90429 Nuernberg E-Mai l : florian.hoffmann@inutech.de
Germany Internet : http://www.inutech.de

inuTech GmbH
Sitz / Registered Office: Nuernberg
Handelsregister / Companies' Register: AG Nürnberg HRB Nr. 19026
Geschäftsführer / Managing Director: Frank Vogel

*****************************************************************
DIFFPACK - THE NEW GENERATION OF SIMULATION-SOFTWARE!

Go to http://www.diffpack.com to read the details
*****************************************************************

2

Hello Florian,

The flag H5F_ACC_CREAT is not supported in the main library and is removed from the C++ API in this coming release. The documentation will show the correct flags also, which are

H5F_ACC_EXCL|H5F_ACC_TRUNC for creating new files

and

H5F_ACC_RDONLY?|H5F_ACC_RDWR for opening existing files

Thanks,

Binh-Minh

···

________________________________
From: Hdf-forum <hdf-forum-bounces@lists.hdfgroup.org> on behalf of Florian Hoffmann <florian.hoffmann@inutech.de>
Sent: Wednesday, October 01, 2014 4:25 AM
To: hdf-forum@lists.hdfgroup.org
Subject: [Hdf-forum] HDF5 1.8.9: H5F_ACC_CREAT

Dear all,

in the HDF5 version I am currently using (1.8.9) the flag

H5F_ACC_CREAT

is not working. An exception is thrown when I try to create a file like this:

H5::H5File H5file_ptr = new H5File("./test.h5", H5F_ACC_CREAT);

->

Exception at 0x761bc42d, code: 0xe06d7363: C++ exception, flags=0x1 (execution cannot be continued) (first chance) at c:\...\hdf5-1.8.9.tar\hdf5-1.8.9\hdf5-1.8.9\c++\src\h5file.cpp:121

refering to the following source code (h5file.cpp):

void H5File::p_get_file(const char* name, unsigned int flags, const FileCreatPropList& create_plist, const FileAccPropList& access_plist)
{
    // These bits only set for creation, so if any of them are set,
    // create the file.
    if( flags & (H5F_ACC_CREAT|H5F_ACC_EXCL|H5F_ACC_TRUNC|H5F_ACC_DEBUG))
    {
    hid_t create_plist_id = create_plist.getId();
    hid_t access_plist_id = access_plist.getId();
    id = H5Fcreate( name, flags, create_plist_id, access_plist_id );
    if( id < 0 ) // throw an exception when open/create fail
    {
        throw FileIException("H5File constructor", "H5Fcreate failed");
    }
    }
    // Open the file if none of the bits above are set.
    else
    {
    hid_t access_plist_id = access_plist.getId();
    id = H5Fopen( name, flags, access_plist_id );
    if( id < 0 ) // throw an exception when open/create fail
    {
        throw FileIException("H5File constructor", "H5Fopen failed");
    }
    }
}

A web search did not result in any information on if it has been solved or not in later releases.
Does anyone have some information on this ?

Furthermore, is my assumption correct, that this flag means:

Create/Open file in Read/Write mode and keep file content if file already exists

?

Thank you

Best regards,

Florian

--
Mit freundlichen Grüßen
--
Dr.-Ing. Florian Hoffmann
inuTech GmbH Phone : +49-(0)911-323843-22
Fuerther Strasse 212 Fax : +49-(0)911-323843-43
90429 Nuernberg E-Mai l : florian.hoffmann@inutech.de<mailto:florian.hoffmann@inutech.de>
Germany Internet : http://www.inutech.de

inuTech GmbH
Sitz / Registered Office: Nuernberg
Handelsregister / Companies' Register: AG Nürnberg HRB Nr. 19026
Geschäftsführer / Managing Director: Frank Vogel

*****************************************************************
DIFFPACK - THE NEW GENERATION OF SIMULATION-SOFTWARE!

Go to http://www.diffpack.com to read the details
*****************************************************************