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Diffstat (limited to 'fortran/examples/attrexample.f90')
-rw-r--r-- | fortran/examples/attrexample.f90 | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/fortran/examples/attrexample.f90 b/fortran/examples/attrexample.f90 new file mode 100644 index 0000000..c71939e --- /dev/null +++ b/fortran/examples/attrexample.f90 @@ -0,0 +1,102 @@ +! This example shows how to create and write a dataset attribute. +! It opens the existing file 'dset.h5', obtains the identifier of +! the dataset "/dset", defines attribute's dataspace, +! creates dataset attribute, writes the attribute, and then closes +! the attribute's dataspace, attribute, dataset, and file. + + PROGRAM ATTREXAMPLE + + + USE HDF5 ! This module contains all necessary modules + + IMPLICIT NONE + + CHARACTER(LEN=8), PARAMETER :: filename = "dsetf.h5" ! File name + CHARACTER(LEN=4), PARAMETER :: dsetname = "dset" ! Dataset name + CHARACTER(LEN=9), PARAMETER :: aname = "attr_long" ! Attribute name + + INTEGER(HID_T) :: file_id ! File identifier + INTEGER(HID_T) :: dset_id ! Dataset identifier + INTEGER(HID_T) :: attr_id ! Attribute identifier + INTEGER(HID_T) :: aspace_id ! Attribute Dataspace identifier + INTEGER(HID_T) :: atype_id ! Attribute Dataspace identifier + INTEGER(HSIZE_T), DIMENSION(1) :: adims = (/2/) ! Attribute dimension + INTEGER :: arank = 1 ! Attribure rank + INTEGER(SIZE_T) :: attrlen ! Length of the attribute string + +! CHARACTER*27, DIMENSION(2) :: attr_data ! Attribute data + CHARACTER*80, DIMENSION(2) :: attr_data ! Attribute data + + INTEGER :: error ! Error flag + + + ! + ! Initialize attribute's data + ! + attr_data(1) = "Dataset character attribute" + attr_data(2) = "Some other string here " +! attrlen = 27 + attrlen = 80 + ! + ! Initialize FORTRAN predefined datatypes. + ! + CALL h5init_types_f(error) + + ! + ! Open an existing file. + ! + CALL h5fopen_f (filename, H5F_ACC_RDWR_F, file_id, error) + + ! + ! Open an existing dataset. + ! + CALL h5dopen_f(file_id, dsetname, dset_id, error) + + ! + ! Create scalar data space for the attribute. + ! + CALL h5screate_simple_f(arank, adims, aspace_id, error) + ! + ! Create datatype for the attribute. + ! + CALL h5tcopy_f(H5T_NATIVE_CHARACTER, atype_id, error) + CALL h5tset_size_f(atype_id, attrlen, error) + + ! + ! Create dataset attribute. + ! + CALL h5acreate_f(dset_id, aname, atype_id, aspace_id, & + attr_id, error) + + ! + ! Write the attribute data. + ! + CALL h5awrite_f(attr_id, atype_id, attr_data, error) + + ! + ! Close the attribute. + ! + CALL h5aclose_f(attr_id, error) + + ! + ! Terminate access to the data space. + ! + CALL h5sclose_f(aspace_id, error) + + ! + ! End access to the dataset and release resources used by it. + ! + CALL h5dclose_f(dset_id, error) + + ! + ! Close the file. + ! + CALL h5fclose_f(file_id, error) + + ! + ! Close FORTRAN predefined datatypes. + ! + CALL h5close_types_f(error) + + END PROGRAM ATTREXAMPLE + |