1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
!
! This program shows how to create, store and dereference references
! to the dataset regions.
! Program creates a file and writes two dimensional integer dataset
! to it. Then program creates and stores references to the hyperslab
! and 3 points selected in the integer dataset, in the second dataset.
! Program reopens the second dataset, reads and dereferences region
! references, and then reads and displays selected data from the
! integer dataset.
!
PROGRAM REG_REFERENCE
USE HDF5 ! This module contains all necessary modules
IMPLICIT NONE
CHARACTER(LEN=10), PARAMETER :: filename = "FORTRAN.h5"
CHARACTER(LEN=6), PARAMETER :: dsetnamev = "MATRIX"
CHARACTER(LEN=17), PARAMETER :: dsetnamer = "REGION_REFERENCES"
INTEGER(HID_T) :: file_id ! File identifier
INTEGER(HID_T) :: space_id ! Dataspace identifier
INTEGER(HID_T) :: spacer_id ! Dataspace identifier
INTEGER(HID_T) :: dsetv_id ! Dataset identifier
INTEGER(HID_T) :: dsetr_id ! Dataset identifier
INTEGER :: error
TYPE(hdset_reg_ref_t_f) , DIMENSION(2) :: ref ! Buffers to store references
TYPE(hdset_reg_ref_t_f) , DIMENSION(2) :: ref_out !
INTEGER(HSIZE_T), DIMENSION(2) :: dims = (/2,9/) ! Datasets dimensions
INTEGER(HSIZE_T), DIMENSION(1) :: dimsr = (/2/) !
INTEGER(HSSIZE_T), DIMENSION(2) :: start
INTEGER(HSIZE_T), DIMENSION(2) :: count
INTEGER :: rankr = 1
INTEGER :: rank = 2
INTEGER , DIMENSION(2,9) :: data
INTEGER , DIMENSION(2,9) :: data_out = 0
INTEGER(HSSIZE_T) , DIMENSION(2,3) :: coord
INTEGER(SIZE_T) ::num_points = 3 ! Number of selected points
INTEGER :: i, j
INTEGER :: ref_size
coord = reshape((/1,1,2,7,1,9/), (/2,3/)) ! Coordinates of selected points
data = reshape ((/1,1,1,2,2,2,3,3,3,4,4,4,5,5,5,6,6,6/), (/2,9/))
!
! Initialize FORTRAN predefined datatypes.
!
CALL h5init_types_f(error)
!
! Create a new file.
!
CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)
! Default file access and file creation
! properties are used.
!
! Create dataspaces:
!
! for dataset with references to dataset regions
!
CALL h5screate_simple_f(rankr, dimsr, spacer_id, error)
!
! for integer dataset
!
CALL h5screate_simple_f(rank, dims, space_id, error)
!
! Create and write datasets:
!
! Integer dataset
!
CALL h5dcreate_f(file_id, dsetnamev, H5T_NATIVE_INTEGER, space_id, &
dsetv_id, error)
CALL h5dwrite_f(dsetv_id, H5T_NATIVE_INTEGER, data, error)
CALL h5dclose_f(dsetv_id, error)
!
! Dataset with references
!
CALL h5dcreate_f(file_id, dsetnamer, H5T_STD_REF_DSETREG, spacer_id, &
dsetr_id, error)
!
! Create a reference to the hyperslab selection.
!
start(1) = 0
start(2) = 3
count(1) = 2
count(2) = 3
CALL h5sselect_hyperslab_f(space_id, H5S_SELECT_SET_F, &
start, count, error)
CALL h5rcreate_f(file_id, dsetnamev, space_id, ref(1), error)
!
! Create a reference to elements selection.
!
CALL h5sselect_none_f(space_id, error)
CALL h5sselect_elements_f(space_id, H5S_SELECT_SET_F, rank, num_points,&
coord, error)
CALL h5rcreate_f(file_id, dsetnamev, space_id, ref(2), error)
!
! Write dataset with the references.
!
ref_size = size(ref)
CALL h5dwrite_f(dsetr_id, H5T_STD_REF_DSETREG, ref, ref_size, error)
!
! Close all objects.
!
CALL h5sclose_f(space_id, error)
CALL h5sclose_f(spacer_id, error)
CALL h5dclose_f(dsetr_id, error)
CALL h5fclose_f(file_id, error)
!
! Reopen the file to test selections.
!
CALL h5fopen_f (filename, H5F_ACC_RDWR_F, file_id, error)
CALL h5dopen_f(file_id, dsetnamer, dsetr_id, error)
!
! Read references to the dataset regions.
!
ref_size = size(ref_out)
CALL h5dread_f(dsetr_id, H5T_STD_REF_DSETREG, ref_out, ref_size, error)
!
! Dereference the first reference.
!
CALL H5rdereference_f(dsetr_id, ref_out(1), dsetv_id, error)
CALL H5rget_region_f(dsetr_id, ref_out(1), space_id, error)
!
! Read selected data from the dataset.
!
CALL h5dread_f(dsetv_id, H5T_NATIVE_INTEGER, data_out, error, &
mem_space_id = space_id, file_space_id = space_id)
write(*,*) "Hypeslab selection"
write(*,*)
do i = 1,2
write(*,*) (data_out (i,j), j = 1,9)
enddo
write(*,*)
CALL h5sclose_f(space_id, error)
CALL h5dclose_f(dsetv_id, error)
data_out = 0
!
! Dereference the second reference.
!
CALL H5rdereference_f(dsetr_id, ref_out(2), dsetv_id, error)
CALL H5rget_region_f(dsetr_id, ref_out(2), space_id, error)
!
! Read selected data from the dataset.
!
CALL h5dread_f(dsetv_id, H5T_NATIVE_INTEGER, data_out, error, &
mem_space_id = space_id, file_space_id = space_id)
write(*,*) "Point selection"
write(*,*)
do i = 1,2
write(*,*) (data_out (i,j), j = 1,9)
enddo
!
! Close all objects
!
CALL h5sclose_f(space_id, error)
CALL h5dclose_f(dsetv_id, error)
CALL h5dclose_f(dsetr_id, error)
!
! Close FORTRAN predefined datatypes.
!
CALL h5close_types_f(error)
END PROGRAM REG_REFERENCE
|
