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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
! Copyright by The HDF Group. *
! Copyright by the Board of Trustees of the University of Illinois. *
! All rights reserved. *
! *
! This file is part of HDF5. The full HDF5 copyright notice, including *
! terms governing use, modification, and redistribution, is contained in *
! the COPYING file, which can be found at the root of the source code *
! distribution tree, or in https://www.hdfgroup.org/licenses. *
! If you do not have access to either file, you may request a copy from *
! help@hdfgroup.org. *
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!
! This example shows how to write and read a hyperslab.
! It is used in the HDF5 Tutorial.
!
PROGRAM H5_SUBSET
USE HDF5 ! This module contains all necessary modules
IMPLICIT NONE
CHARACTER(LEN=9), PARAMETER :: filename = "subset.h5" ! File name
CHARACTER(LEN=8), PARAMETER :: dsetname = "IntArray" ! Dataset name
INTEGER(HID_T) :: file_id ! File identifier
INTEGER(HID_T) :: dset_id ! Dataset identifier
INTEGER(HID_T) :: dataspace ! Dataspace identifier
INTEGER(HID_T) :: memspace ! memspace identifier
!
! To change the subset size, modify size of dimsm, sdata, dim0_sub,
! dim1_sub, and count
!
INTEGER(HSIZE_T), DIMENSION(1:2) :: dimsm = (/4,3/) ! Dataset dimensions
INTEGER, DIMENSION(1:4,1:3) :: sdata ! Subset buffer
INTEGER :: dim0_sub = 4
INTEGER :: dim1_sub = 3
INTEGER(HSIZE_T), DIMENSION(1:2) :: count = (/4,3/) ! Size of hyperslab
INTEGER(HSIZE_T), DIMENSION(1:2) :: offset = (/2,1/) ! Hyperslab offset
INTEGER(HSIZE_T), DIMENSION(1:2) :: stride = (/1,1/) ! Hyperslab stride
INTEGER(HSIZE_T), DIMENSION(1:2) :: block = (/1,1/) ! Hyperslab block size
INTEGER(HSIZE_T), DIMENSION(1:2) :: dimsf = (/10,8/) ! Dataset dimensions
INTEGER, DIMENSION(1:10,1:8) :: data ! Data to write
INTEGER, DIMENSION(1:10,1:8) :: rdata ! Data to read
INTEGER :: rank = 2 ! Dataset rank ( in file )
INTEGER :: dim0 = 10 ! Dataset size in file
INTEGER :: dim1 = 8
INTEGER :: i, j
INTEGER :: error ! Error flag
INTEGER(HSIZE_T), DIMENSION(2) :: data_dims
!
! Write data to the HDF5 file.
!
!
! Data initialization.
!
DO i = 1, dim0
DO j = 1, dim1
IF (i .LE. (dim0 / 2)) THEN
data(i,j) = 1
ELSE
data(i,j) = 2
END IF
END DO
END DO
!
! Initialize FORTRAN interface.
!
CALL h5open_f(error)
!
! Create a new file using default properties.
!
CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)
!
! Create the data space for the dataset.
!
CALL h5screate_simple_f(rank, dimsf, dataspace, error)
!
! Create the dataset with default properties.
!
CALL h5dcreate_f(file_id, dsetname, H5T_NATIVE_INTEGER, dataspace, &
dset_id, error)
!
! Write the dataset.
!
data_dims(1) = dim0
data_dims(2) = dim1
CALL h5dwrite_f(dset_id, H5T_NATIVE_INTEGER, data, data_dims, error)
!
! Data Written to File
!
WRITE(*,'(/,A)') "Original Data Written to File:"
DO i = 1, dim0
WRITE(*,'(100(1X,I0,1X))') DATA(i,1:dim1)
END DO
!
!
! Close the dataspace, dataset, and file.
!
CALL h5sclose_f(dataspace, error)
CALL h5dclose_f(dset_id, error)
CALL h5fclose_f(file_id, error)
!
! Initialize subset data array.
!
sdata(1:dim0_sub,1:dim1_sub) = 5
!
! Open the file.
!
CALL h5fopen_f(filename, H5F_ACC_RDWR_F, file_id, error)
!
! Open the dataset.
!
CALL h5dopen_f(file_id, dsetname, dset_id, error)
!
! Get dataset's dataspace identifier and select subset.
!
CALL h5dget_space_f(dset_id, dataspace, error)
CALL h5sselect_hyperslab_f(dataspace, H5S_SELECT_SET_F, &
offset, count, error, stride, BLOCK)
!
! Create memory dataspace.
!
CALL h5screate_simple_f(rank, dimsm, memspace, error)
WRITE(*,'(/,A)') "Write subset to file specifying:"
WRITE(*,'(A,/)') " offset=2x1 stride=1x1 count=4x3 block=1x1"
!
! Write subset to dataset
!
data_dims(1:2) = (/dim0_sub, dim1_sub/)
CALL h5dwrite_f(dset_id, H5T_NATIVE_INTEGER, sdata, data_dims, error, &
memspace, dataspace)
data_dims(1:2) = (/dim0, dim1/)
CALL h5dread_f(dset_id, H5T_NATIVE_INTEGER, rdata, data_dims, error)
!
! Read entire dataset back
!
WRITE(*,'(A)') "Data in File after Subset Written:"
DO i = 1, dim0
WRITE(*,'(100(1X,I0,1X))') rdata(i,1:dim1)
END DO
PRINT *, " "
!
! Close everything opened.
!
CALL h5sclose_f(dataspace, error)
CALL h5sclose_f(memspace, error)
CALL h5dclose_f(dset_id, error)
CALL h5fclose_f(file_id, error)
!
! Close FORTRAN interface.
!
CALL h5close_f(error)
END PROGRAM H5_SUBSET
|
