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doc/html/Tutor/examples/grpit.f90
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194
doc/html/Tutor/examples/grpit.f90
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!
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! In this example we iterate through the members of the groups.
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!
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PROGRAM GRPITEXAMPLE
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USE HDF5 ! This module contains all necessary modules
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IMPLICIT NONE
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CHARACTER(LEN=11), PARAMETER :: filename = "iteratef.h5" ! File name
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CHARACTER(LEN=7), PARAMETER :: groupname1 = "MyGroup" ! Group name
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CHARACTER(LEN=15), PARAMETER :: groupname2 = "Group_A" ! Group name
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CHARACTER(LEN=13), PARAMETER :: dsetname1 = "dset1" ! Dataset name
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CHARACTER(LEN=5), PARAMETER :: dsetname2 = "dset2" !
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CHARACTER(LEN=20) :: name_buffer ! Buffer to hold object's name
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INTEGER :: type ! Type of the object
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INTEGER :: nmembers ! Number of group members
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INTEGER(HID_T) :: file_id ! File identifier
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INTEGER(HID_T) :: dataset1_id ! Dataset1 identifier
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INTEGER(HID_T) :: dataset2_id ! Dataset2 identifier
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INTEGER(HID_T) :: dataspace1_id ! Data space identifier
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INTEGER(HID_T) :: dataspace2_id ! Data space identifier
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INTEGER(HID_T) :: group1_id, group2_id ! Group identifiers
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INTEGER :: i, j
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INTEGER :: error ! Error flag
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INTEGER, DIMENSION(3,3) :: dset1_data ! Arrays to hold data
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INTEGER, DIMENSION(2,10) :: dset2_data !
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INTEGER(HSIZE_T), DIMENSION(2) :: dims1 = (/3,3/) ! Dataset dimensions
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INTEGER(HSIZE_T), DIMENSION(2) :: dims2 = (/2,10/)!
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INTEGER :: rank = 2 ! Datasets rank
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!
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! Initialize dset1_data array.
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!
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do i = 1, 3
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do j = 1, 3
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dset1_data(i,j) = j;
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end do
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end do
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!
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! Initialize dset2_data array.
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!
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do i = 1, 2
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do j = 1, 10
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dset2_data(i,j) = j;
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end do
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end do
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!
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! Initialize FORTRAN interface.
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!
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CALL h5open_f(error)
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!
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! Create a new file using default properties.
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!
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CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)
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!
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! Create group "MyGroup" in the root group using absolute name.
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!
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CALL h5gcreate_f(file_id, groupname1, group1_id, error)
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!
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! Create group "Group_A" in group "MyGroup" using relative name.
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!
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CALL h5gcreate_f(group1_id, groupname2, group2_id, error)
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!
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! Create the data space for the first dataset.
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!
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CALL h5screate_simple_f(rank, dims1, dataspace1_id, error)
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!
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! Create a dataset in group "MyGroup" with default properties.
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!
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CALL h5dcreate_f(group1_id, dsetname1, H5T_NATIVE_INTEGER, dataspace1_id, &
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dataset1_id, error)
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!
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! Write the first dataset.
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!
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CALL h5dwrite_f(dataset1_id, H5T_NATIVE_INTEGER, dset1_data, error)
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!
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! Create the data space for the second dataset.
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!
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CALL h5screate_simple_f(rank, dims2, dataspace2_id, error)
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!
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! Create the second dataset in group "Group_A" with default properties
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!
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CALL h5dcreate_f(group2_id, dsetname2, H5T_NATIVE_INTEGER, dataspace2_id, &
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dataset2_id, error)
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!
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! Write the second dataset
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!
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CALL h5dwrite_f(dataset2_id, H5T_NATIVE_INTEGER, dset2_data, error)
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!
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! Get number of members in the root group.
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!
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CALL h5gn_members_f(file_id, "/", nmembers, error)
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write(*,*) "Number of root group member is " , nmembers
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!
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! Print each group member's name and type.
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!
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do i = 0, nmembers - 1
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CALL h5gget_obj_info_idx_f(file_id, "/", i, name_buffer, type, &
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error)
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write(*,*) name_buffer, type
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end do
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!
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! Get number of members in MyGroup.
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!
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CALL h5gn_members_f(file_id, "MyGroup", nmembers, error)
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write(*,*) "Number of group MyGroup member is ", nmembers
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!
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! Print each group member's name and type in "MyGroup" group.
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!
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do i = 0, nmembers - 1
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CALL h5gget_obj_info_idx_f(file_id, groupname1, i, name_buffer, type, &
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error)
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write(*,*) name_buffer, type
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end do
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!
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! Get number of members in MyGroup/Group_A.
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!
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CALL h5gn_members_f(file_id, "MyGroup/Group_A", nmembers, error)
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write(*,*) "Number of group MyGroup/Group_A member is ", nmembers
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!
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! Print each group member's name and type in "MyGroup/Group_A" group.
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!
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do i = 0, nmembers - 1
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CALL h5gget_obj_info_idx_f(file_id,"MyGroup/Group_A" , i, name_buffer, type, &
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error)
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write(*,*) name_buffer, type
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end do
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!
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! Close the dataspace for the first dataset.
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!
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CALL h5sclose_f(dataspace1_id, error)
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!
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! Close the first dataset.
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!
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CALL h5dclose_f(dataset1_id, error)
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!
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! Close the dataspace for the second dataset.
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!
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CALL h5sclose_f(dataspace2_id, error)
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!
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! Close the second dataset.
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!
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CALL h5dclose_f(dataset2_id, error)
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!
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! Close the groups.
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!
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CALL h5gclose_f(group1_id, error)
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CALL h5gclose_f(group2_id, error)
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!
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! Close the file.
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!
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CALL h5fclose_f(file_id, error)
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!
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! Close FORTRAN interface.
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!
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CALL h5close_f(error)
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END PROGRAM GRPITEXAMPLE
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