mirror of
https://github.com/HDFGroup/hdf5.git
synced 2024-11-27 02:10:55 +08:00
ae818ca9df
Purpose:
Code clean up.
Description:
Many F90 compilers were not happy about character*(*) declarations.
Solution:
Used F90 character(len=*) declarations.
Platforms tested:
Solaris 2.7 and Linux 2.4
218 lines
7.5 KiB
Fortran
218 lines
7.5 KiB
Fortran
!
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! This program creates a dataset that is one dimensional array of
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! structures {
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! character*2
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! integer
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! double precision
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! real
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! }
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! Data is written and read back by fields.
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!
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PROGRAM COMPOUNDEXAMPLE
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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 = "compound.h5" ! File name
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CHARACTER(LEN=8), PARAMETER :: dsetname = "Compound" ! Dataset name
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INTEGER, PARAMETER :: dimsize = 6 ! Size of the dataset
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INTEGER(HID_T) :: file_id ! File identifier
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INTEGER(HID_T) :: dset_id ! Dataset identifier
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INTEGER(HID_T) :: dspace_id ! Dataspace identifier
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INTEGER(HID_T) :: dtype_id ! Compound datatype identifier
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INTEGER(HID_T) :: dt1_id ! Memory datatype identifier (for character field)
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INTEGER(HID_T) :: dt2_id ! Memory datatype identifier (for integer field)
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INTEGER(HID_T) :: dt3_id ! Memory datatype identifier (for double precision field)
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INTEGER(HID_T) :: dt4_id ! Memory datatype identifier (for real field)
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INTEGER(HID_T) :: dt5_id ! Memory datatype identifier
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INTEGER(HID_T) :: plist_id ! Dataset trasfer property
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INTEGER(SIZE_T) :: typesize
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INTEGER(HSIZE_T), DIMENSION(1) :: dims = (/dimsize/) ! Dataset dimensions
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INTEGER :: rank = 1 ! Dataset rank
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INTEGER :: error ! Error flag
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INTEGER(SIZE_T) :: type_size ! Size of the datatype
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INTEGER(SIZE_T) :: type_sizec ! Size of the character datatype
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INTEGER(SIZE_T) :: type_sizei ! Size of the integer datatype
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INTEGER(SIZE_T) :: type_sized ! Size of the double precision datatype
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INTEGER(SIZE_T) :: type_sizer ! Size of the real datatype
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INTEGER(SIZE_T) :: offset ! Member's offset
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CHARACTER(LEN=2), DIMENSION(dimsize) :: char_member
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CHARACTER(LEN=2), DIMENSION(dimsize) :: char_member_out ! Buffer to read data out
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INTEGER, DIMENSION(dimsize) :: int_member
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DOUBLE PRECISION, DIMENSION(dimsize) :: double_member
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REAL, DIMENSION(dimsize) :: real_member
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INTEGER :: i
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INTEGER, DIMENSION(7) :: data_dims
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data_dims(1) = dimsize
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!
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! Initialize data buffer.
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!
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do i = 1, dimsize
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char_member(i)(1:1) = char(65+i)
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char_member(i)(2:2) = char(65+i)
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char_member_out(i)(1:1) = char(65)
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char_member_out(i)(2:2) = char(65)
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int_member(i) = i
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double_member(i) = 2.* i
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real_member(i) = 3. * i
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enddo
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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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! Set dataset transfer property to preserve partially initialized fields
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! during write/read to/from dataset with compound datatype.
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!
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CALL h5pcreate_f(H5P_DATASET_XFER_F, plist_id, error)
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CALL h5pset_preserve_f(plist_id, 1, 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 the dataspace.
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!
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CALL h5screate_simple_f(rank, dims, dspace_id, error)
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!
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! Create compound datatype.
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!
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! First calculate total size by calculating sizes of each member
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!
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CALL h5tcopy_f(H5T_NATIVE_CHARACTER, dt5_id, error)
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typesize = 2
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CALL h5tset_size_f(dt5_id, typesize, error)
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CALL h5tget_size_f(dt5_id, type_sizec, error)
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CALL h5tget_size_f(H5T_NATIVE_INTEGER, type_sizei, error)
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CALL h5tget_size_f(H5T_NATIVE_DOUBLE, type_sized, error)
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CALL h5tget_size_f(H5T_NATIVE_REAL, type_sizer, error)
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type_size = type_sizec + type_sizei + type_sized + type_sizer
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CALL h5tcreate_f(H5T_COMPOUND_F, type_size, dtype_id, error)
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!
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! Insert memebers
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!
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! CHARACTER*2 memeber
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!
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offset = 0
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CALL h5tinsert_f(dtype_id, "char_field", offset, dt5_id, error)
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!
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! INTEGER member
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!
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offset = offset + type_sizec ! Offset of the second memeber is 2
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CALL h5tinsert_f(dtype_id, "integer_field", offset, H5T_NATIVE_INTEGER, error)
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!
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! DOUBLE PRECISION member
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!
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offset = offset + type_sizei ! Offset of the third memeber is 6
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CALL h5tinsert_f(dtype_id, "double_field", offset, H5T_NATIVE_DOUBLE, error)
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!
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! REAL member
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!
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offset = offset + type_sized ! Offset of the last member is 14
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CALL h5tinsert_f(dtype_id, "real_field", offset, H5T_NATIVE_REAL, error)
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!
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! Create the dataset with compound datatype.
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!
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CALL h5dcreate_f(file_id, dsetname, dtype_id, dspace_id, &
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dset_id, error)
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!
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! Create memory types. We have to create a compound datatype
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! for each member we want to write.
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!
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CALL h5tcreate_f(H5T_COMPOUND_F, type_sizec, dt1_id, error)
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offset = 0
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CALL h5tinsert_f(dt1_id, "char_field", offset, dt5_id, error)
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!
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CALL h5tcreate_f(H5T_COMPOUND_F, type_sizei, dt2_id, error)
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offset = 0
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CALL h5tinsert_f(dt2_id, "integer_field", offset, H5T_NATIVE_INTEGER, error)
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!
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CALL h5tcreate_f(H5T_COMPOUND_F, type_sized, dt3_id, error)
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offset = 0
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CALL h5tinsert_f(dt3_id, "double_field", offset, H5T_NATIVE_DOUBLE, error)
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!
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CALL h5tcreate_f(H5T_COMPOUND_F, type_sizer, dt4_id, error)
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offset = 0
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CALL h5tinsert_f(dt4_id, "real_field", offset, H5T_NATIVE_REAL, error)
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!
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! Write data by fields in the datatype. Fields order is not important.
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!
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CALL h5dwrite_f(dset_id, dt4_id, real_member, data_dims, error, xfer_prp = plist_id)
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CALL h5dwrite_f(dset_id, dt1_id, char_member, data_dims, error, xfer_prp = plist_id)
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CALL h5dwrite_f(dset_id, dt3_id, double_member, data_dims, error, xfer_prp = plist_id)
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CALL h5dwrite_f(dset_id, dt2_id, int_member, data_dims, error, xfer_prp = plist_id)
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!
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! End access to the dataset and release resources used by it.
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!
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CALL h5dclose_f(dset_id, error)
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!
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! Terminate access to the data space.
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!
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CALL h5sclose_f(dspace_id, error)
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!
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! Terminate access to the datatype
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!
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CALL h5tclose_f(dtype_id, error)
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CALL h5tclose_f(dt1_id, error)
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CALL h5tclose_f(dt2_id, error)
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CALL h5tclose_f(dt3_id, error)
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CALL h5tclose_f(dt4_id, error)
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CALL h5tclose_f(dt5_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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! Open the file.
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!
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CALL h5fopen_f (filename, H5F_ACC_RDWR_F, file_id, error)
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!
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! Open the dataset.
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!
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CALL h5dopen_f(file_id, dsetname, dset_id, error)
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!
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! Create memeory datatyoe to read character member of the compound datatype.
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!
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CALL h5tcopy_f(H5T_NATIVE_CHARACTER, dt2_id, error)
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typesize = 2
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CALL h5tset_size_f(dt2_id, typesize, error)
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CALL h5tget_size_f(dt2_id, type_size, error)
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CALL h5tcreate_f(H5T_COMPOUND_F, type_size, dt1_id, error)
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offset = 0
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CALL h5tinsert_f(dt1_id, "char_field", offset, dt2_id, error)
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!
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! Read part of the datatset and display it.
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!
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CALL h5dread_f(dset_id, dt1_id, char_member_out, data_dims, error)
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write(*,*) (char_member_out(i), i=1, dimsize)
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!
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! Close all open objects.
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!
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CALL h5dclose_f(dset_id, error)
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CALL h5tclose_f(dt1_id, error)
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CALL h5tclose_f(dt2_id, error)
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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 COMPOUNDEXAMPLE
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