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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
|
!
! This program creates two files, copy1.h5, and copy2.h5.
! In copy1.h5, it creates a 3x4 dataset called 'Copy1',
! and write 0's to this dataset.
! In copy2.h5, it create a 3x4 dataset called 'Copy2',
! and write 1's to this dataset.
! It closes both files, reopens both files, selects two
! points in copy1.h5 and writes values to them. Then it
! uses an H5Scopy to write the same selection to copy2.h5.
! Program reopens the files, and reads and prints the contents of
! the two datasets.
!
PROGRAM SELECTEXAMPLE
USE HDF5 ! This module contains all necessary modules
IMPLICIT NONE
CHARACTER(LEN=8), PARAMETER :: filename1 = "copy1.h5" ! File name
CHARACTER(LEN=8), PARAMETER :: filename2 = "copy2.h5" !
CHARACTER(LEN=5), PARAMETER :: dsetname1 = "Copy1" ! Dataset name
CHARACTER(LEN=5), PARAMETER :: dsetname2 = "Copy2" !
INTEGER, PARAMETER :: RANK = 2 ! Dataset rank
INTEGER(SIZE_T), PARAMETER :: NUMP = 2 ! Number of points selected
INTEGER(HID_T) :: file1_id ! File1 identifier
INTEGER(HID_T) :: file2_id ! File2 identifier
INTEGER(HID_T) :: dset1_id ! Dataset1 identifier
INTEGER(HID_T) :: dset2_id ! Dataset2 identifier
INTEGER(HID_T) :: dataspace1 ! Dataspace identifier
INTEGER(HID_T) :: dataspace2 ! Dataspace identifier
INTEGER(HID_T) :: memspace ! memspace identifier
INTEGER(HSIZE_T), DIMENSION(1) :: dimsm = (/2/)
! Memory dataspace dimensions
INTEGER(HSIZE_T), DIMENSION(2) :: dimsf = (/3,4/)
! File dataspace dimensions
INTEGER(HSIZE_T), DIMENSION(RANK,NUMP) :: coord ! Elements coordinates
! in the file
INTEGER, DIMENSION(3,4) :: buf1, buf2, bufnew ! Data buffers
INTEGER, DIMENSION(2) :: val = (/53, 59/) ! Values to write
INTEGER :: memrank = 1 ! Rank of the dataset in memory
INTEGER :: i, j
INTEGER :: error ! Error flag
LOGICAL :: status
!
! Create two files containing identical datasets. Write 0's to one
! and 1's to the other.
!
!
! Data initialization.
!
do i = 1, 3
do j = 1, 4
buf1(i,j) = 0;
end do
end do
do i = 1, 3
do j = 1, 4
buf2(i,j) = 1;
end do
end do
!
! Initialize FORTRAN predefined datatypes
!
CALL h5open_f(error)
!
! Create file1, file2 using default properties.
!
CALL h5fcreate_f(filename1, H5F_ACC_TRUNC_F, file1_id, error)
CALL h5fcreate_f(filename2, H5F_ACC_TRUNC_F, file2_id, error)
!
! Create the data space for the datasets.
!
CALL h5screate_simple_f(RANK, dimsf, dataspace1, error)
CALL h5screate_simple_f(RANK, dimsf, dataspace2, error)
!
! Create the datasets with default properties.
!
CALL h5dcreate_f(file1_id, dsetname1, H5T_NATIVE_INTEGER, dataspace1, &
dset1_id, error)
CALL h5dcreate_f(file2_id, dsetname2, H5T_NATIVE_INTEGER, dataspace2, &
dset2_id, error)
!
! Write the datasets.
!
CALL h5dwrite_f(dset1_id, H5T_NATIVE_INTEGER, buf1, error)
CALL h5dwrite_f(dset2_id, H5T_NATIVE_INTEGER, buf2, error)
!
! Close the dataspace for the datasets.
!
CALL h5sclose_f(dataspace1, error)
CALL h5sclose_f(dataspace2, error)
!
! Close the datasets.
!
CALL h5dclose_f(dset1_id, error)
CALL h5dclose_f(dset2_id, error)
!
! Close the files.
!
CALL h5fclose_f(file1_id, error)
CALL h5fclose_f(file2_id, error)
!
! Open the two files. Select two points in one file, write values to
! those point locations, then do H5Scopy and write the values to the
! other file. Close files.
!
!
! Open the files.
!
CALL h5fopen_f (filename1, H5F_ACC_RDWR_F, file1_id, error)
CALL h5fopen_f (filename2, H5F_ACC_RDWR_F, file2_id, error)
!
! Open the datasets.
!
CALL h5dopen_f(file1_id, dsetname1, dset1_id, error)
CALL h5dopen_f(file2_id, dsetname2, dset2_id, error)
!
! Get dataset1's dataspace identifier.
!
CALL h5dget_space_f(dset1_id, dataspace1, error)
!
! Create memory dataspace.
!
CALL h5screate_simple_f(memrank, dimsm, memspace, error)
!
! Set the selected point positions. Because Fortran array index starts
! from 1, so add one to the actual select points in C.
!
coord(1,1) = 1
coord(2,1) = 2
coord(1,2) = 1
coord(2,2) = 4
!
! Select the elements in file space.
!
CALL h5sselect_elements_f(dataspace1, H5S_SELECT_SET_F, RANK, NUMP,&
coord, error)
!
! Write value into the selected points in dataset1.
!
CALL H5dwrite_f(dset1_id, H5T_NATIVE_INTEGER, val, error, &
mem_space_id=memspace, file_space_id=dataspace1)
!
! Copy the daspace1 into dataspace2.
!
CALL h5scopy_f(dataspace1, dataspace2, error)
!
! Write value into the selected points in dataset2.
!
CALL H5dwrite_f(dset2_id, H5T_NATIVE_INTEGER, val, error, &
mem_space_id=memspace, file_space_id=dataspace2)
!
! Close the dataspace for the datasets.
!
CALL h5sclose_f(dataspace1, error)
CALL h5sclose_f(dataspace2, error)
!
! Close the memoryspace.
!
CALL h5sclose_f(memspace, error)
!
! Close the datasets.
!
CALL h5dclose_f(dset1_id, error)
CALL h5dclose_f(dset2_id, error)
!
! Close the files.
!
CALL h5fclose_f(file1_id, error)
CALL h5fclose_f(file2_id, error)
!
! Open both files and print the contents of the datasets.
!
!
! Open the files.
!
CALL h5fopen_f (filename1, H5F_ACC_RDWR_F, file1_id, error)
CALL h5fopen_f (filename2, H5F_ACC_RDWR_F, file2_id, error)
!
! Open the datasets.
!
CALL h5dopen_f(file1_id, dsetname1, dset1_id, error)
CALL h5dopen_f(file2_id, dsetname2, dset2_id, error)
!
! Read dataset from the first file.
!
CALL h5dread_f(dset1_id, H5T_NATIVE_INTEGER, bufnew, error)
!
! Display the data read from dataset "Copy1"
!
write(*,*) "The data in dataset Copy1 is: "
do i = 1, 3
print *, (bufnew(i,j), j = 1,4)
end do
!
! Read dataset from the second file.
!
CALL h5dread_f(dset2_id, H5T_NATIVE_INTEGER, bufnew, error)
!
! Display the data read from dataset "Copy2"
!
write(*,*) "The data in dataset Copy2 is: "
do i = 1, 3
print *, (bufnew(i,j), j = 1,4)
end do
!
! Close datasets.
!
CALL h5dclose_f(dset1_id, error)
CALL h5dclose_f(dset2_id, error)
!
! Close files.
!
CALL h5fclose_f(file1_id, error)
CALL h5fclose_f(file2_id, error)
!
! Close FORTRAN predefined datatypes.
!
CALL h5close_f(error)
END PROGRAM SELECTEXAMPLE
|
