Thank you Scott for the quick response. It seems that the Fortran2003 interface for H5Dwrite solves both questions, but there are other subroutines like H5Screate_simple_f or H5Sselect_hyperslab_f using HSIZE_T integers to specify dimensions or offsets.
I still have the following doubts: - HSIZE_T can be an integer of different kinds depending on the platform? - What is the easiest way to handle dataspaces with offsets or dimensions bigger than HSIZE_T? Best regards, Víctor. 2015-11-10 15:53 GMT+01:00 Scot Breitenfeld <brtn...@hdfgroup.org>: > I would suggest you use the Fortran 2003 interface for h5dwrite_f instead: > > SUBROUTINE h5dwrite_f(dset_id, mem_type_id, buf, hdferr, & > mem_space_id, file_space_id, xfer_prp) > INTEGER(HID_T), INTENT(IN) :: dset_id > INTEGER(HID_T), INTENT(IN) :: mem_type_id > TYPE(C_PTR) , INTENT(IN) :: buf > INTEGER , INTENT(OUT) :: hdferr > INTEGER(HID_T), INTENT(IN) , OPTIONAL :: mem_space_id > INTEGER(HID_T), INTENT(IN) , OPTIONAL :: file_space_id > INTEGER(HID_T), INTENT(IN) , OPTIONAL :: xfer_prp > > as you don’t have to worry about passing the dimensions of the array to > the API. > > You can also use ‘h5kind_to_type' to pass the appropriate type, for example > ! > ! Find the HDF type corresponding to the specified KIND > ! > h5_kind_type_i = h5kind_to_type(ip,H5_INTEGER_KIND) > > Take a look at h5ex_d_rdwr_kind_F03.f90 for an example of how to handle > different kinds of integers and reals, > > https://www.hdfgroup.org/HDF5/examples/api18-fortran.html > > Scot > > > On Nov 10, 2015, at 2:17 AM, victor sv <victo...@gmail.com> wrote: > > > > Hi all, > > > > I'm trying to implement a layer to export the data of our application to > XDMF format on top of HDF5. The data > > types that we want to handle are integers and reals of both single and > double precision. > > > > I would like to know the actual state of the HDF5 Fortran interface for > handling double precision integers. > > > > In particular, if we observe to the interface of the H5DWrite_f > subroutine below (and its comments) we can see that the > > data type of the buffer (buf) could be INTEGER, and the data type of the > dimensions is HSIZE_T. > > > > SUBROUTINE h5dwrite_vl_f(dset_id, mem_type_id, buf, dims > > , len, hdferr, & > > mem_space_id, file_space_id, xfer_prp) > > IMPLICIT NONE > > ... > > > > INTEGER(HID_T), INTENT(IN) :: mem_type_id ! Memory datatype identifier > > TYPE, INTENT(IN), & DIMENSION(dims(1),dims(2)) :: buf > > ! Data buffer; may be a > scalar > > ! or an array > > ! TYPE must be one of the > following > > ! INTEGER > > ! REAL > > ! CHARACTER > > INTEGER(HSIZE_T), INTENT(IN), DIMENSION(2) :: dims > > ! Array to hold corresponding > > ! dimension sizes of data > > ! buffer buf > > ! dim(k) has value of the > k-th > > ! dimension of buffer buf > > ! Values are ignored if buf > is > > ! a scalar > > > > ... > > > > I've read that the HSIZE_T data type depends on the architecture and > it's defined at HDF5 compilation time and I can check > > that in my own compilation it's as double precision integer (64 bits). > Is there any case where this value is a single precision > > integer (32)? In any case, how can I handle the writing of datasets > bigger than max(HSIZE_T)? > > > > A different questions are about the data type of the raw data. In my > HDF5 compilation it seems that the H5DWrite_f procedure > > doesn't compile if the buf actual argument is a double precision > integer. There is a native Fortran HDF5 mem_type_id for > > double precision integers? > > > > In some forum I've also read that the H5T_NATIVE_INTEGER could be a > doble precision integer. If this is true, it is posible to > > handle single precision and double precision integers in the same > application/software? > > > > Thanks in advance, > > Víctor. > > > > > > > > _______________________________________________ > > Hdf-forum is for HDF software users discussion. > > Hdf-forum@lists.hdfgroup.org > > http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > > Twitter: https://twitter.com/hdf5 > > _______________________________________________ > Hdf-forum is for HDF software users discussion. > Hdf-forum@lists.hdfgroup.org > http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org > Twitter: https://twitter.com/hdf5
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