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
|
! This is the F2003 version of the h5_compound.c example source code.
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
! 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 files COPYING and Copyright.html. COPYING can be found at the root *
! of the source code distribution tree; Copyright.html can be found at the *
! root level of an installed copy of the electronic HDF5 document set and *
! is linked from the top-level documents page. It can also be found at *
! http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
! access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!
! This example shows how to create a compound data type,
! write an array which has the compound data type to the file,
! and read back fields' subsets.
!
PROGRAM main
USE hdf5
USE ISO_C_BINDING
IMPLICIT NONE
! KIND parameters
INTEGER, PARAMETER :: int_k1 = SELECTED_INT_KIND(1) ! This should map to INTEGER*1 on most modern processors
INTEGER, PARAMETER :: int_k2 = SELECTED_INT_KIND(4) ! This should map to INTEGER*2 on most modern processors
INTEGER, PARAMETER :: int_k4 = SELECTED_INT_KIND(8) ! This should map to INTEGER*4 on most modern processors
INTEGER, PARAMETER :: int_k8 = SELECTED_INT_KIND(16) ! This should map to INTEGER*8 on most modern processors
INTEGER, PARAMETER :: r_k4 = SELECTED_REAL_KIND(5) ! This should map to REAL*4 on most modern processors
INTEGER, PARAMETER :: r_k8 = SELECTED_REAL_KIND(10) ! This should map to REAL*8 on most modern processors
! FILES
CHARACTER(LEN=*), PARAMETER :: H5FILE_NAME = "SDScompound.h5"
CHARACTER(LEN=*), PARAMETER :: DATASETNAME = "ArrayOfStructures"
INTEGER, PARAMETER :: LENGTH = 10
INTEGER, PARAMETER :: RANK = 1
!----------------------------------------------------------------
! First derived-type and dataset
TYPE s1_t
CHARACTER(LEN=1), DIMENSION(1:13) :: chr
INTEGER(KIND=int_k1) :: a
REAL(KIND=r_k4) :: b
REAL(KIND=r_k8) :: c
END TYPE s1_t
TYPE(s1_t), TARGET :: s1(LENGTH)
INTEGER(hid_t) :: s1_tid ! File datatype identifier
!----------------------------------------------------------------
! Second derived-type (subset of s1_t) and dataset
TYPE s2_t
CHARACTER(LEN=1), DIMENSION(1:13) :: chr
REAL(KIND=r_k8) :: c
INTEGER(KIND=int_k1) :: a
END TYPE s2_t
type(s2_t), target :: s2(LENGTH)
integer(hid_t) :: s2_tid ! Memory datatype handle
!----------------------------------------------------------------
! Third "derived-type" (will be used to read float field of s1)
INTEGER(hid_t) :: s3_tid ! Memory datatype handle
REAL(KIND=r_k4), TARGET :: s3(LENGTH)
INTEGER :: i
INTEGER(hid_t) :: file, dataset, space
!type(H5F_fileid_type) :: file
!type(H5D_dsetid_type) :: dataset
!type(H5S_spaceid_type) :: space
INTEGER(hsize_t) :: DIM(1) = (/LENGTH/) ! Dataspace dimensions
INTEGER(SIZE_T) :: type_size ! Size of the datatype
INTEGER(SIZE_T) :: offset, sizeof_compound
INTEGER :: hdferr
TYPE(C_PTR) :: f_ptr
INTEGER(SIZE_T) :: type_sizei ! Size of the integer datatype
INTEGER(SIZE_T) :: type_sizer ! Size of the real datatype
INTEGER(SIZE_T) :: type_sized ! Size of the double datatype
INTEGER(hid_t) :: tid3 ! /* Nested Array Datatype ID */
INTEGER(HSIZE_T), DIMENSION(1) :: tdims1=(/13/)
!
! Initialize FORTRAN interface.
!
CALL h5open_f(hdferr)
!
! Initialize the data
!
DO i = 0, LENGTH-1
s1(i+1)%chr(1)(1:1) = 'a'
s1(i+1)%chr(2)(1:1) = 'b'
s1(i+1)%chr(3)(1:1) = 'c'
s1(i+1)%chr(4:12)(1:1) = ' '
s1(i+1)%chr(13)(1:1) = 'd'
s1(i+1)%a = i
s1(i+1)%b = i*i
s1(i+1)%c = 1./REAL(i+1)
END DO
!
! Create the data space.
!
!
CALL H5Screate_simple_f(RANK, dim, space, hdferr)
!
! Create the file.
!
CALL H5Fcreate_f(H5FILE_NAME, H5F_ACC_TRUNC_F, file, hdferr)
!
! Create the memory data type.
!
CALL H5Tcreate_f(H5T_COMPOUND_F, H5OFFSETOF(C_LOC(s1(1)), C_LOC(s1(2))), s1_tid, hdferr)
CALL h5tarray_create_f(H5T_NATIVE_CHARACTER, 1, tdims1, tid3, hdferr)
CALL H5Tinsert_f(s1_tid, "chr_name", H5OFFSETOF(C_LOC(s1(1)),C_LOC(s1(1)%chr)),tid3, hdferr)
CALL H5Tinsert_f(s1_tid, "a_name", H5OFFSETOF(C_LOC(s1(1)),C_LOC(s1(1)%a)), h5kind_to_type(int_k1,H5_INTEGER_KIND), hdferr)
CALL H5Tinsert_f(s1_tid, "c_name", H5OFFSETOF(C_LOC(s1(1)),C_LOC(s1(1)%c)), h5kind_to_type(r_k8,H5_REAL_KIND), hdferr)
CALL H5Tinsert_f(s1_tid, "b_name", H5OFFSETOF(C_LOC(s1(1)),C_LOC(s1(1)%b)), h5kind_to_type(r_k4,H5_REAL_KIND), hdferr)
!
! Create the dataset.
!
CALL H5Dcreate_f(file, DATASETNAME, s1_tid, space, dataset, hdferr)
!
! Write data to the dataset
!
f_ptr = C_LOC(s1(1))
CALL H5Dwrite_f(dataset, s1_tid, f_ptr, hdferr)
!
! Release resources
!
CALL H5Tclose_f(s1_tid, hdferr)
CALL H5Sclose_f(space, hdferr)
CALL H5Dclose_f(dataset, hdferr)
CALL H5Fclose_f(file, hdferr)
!
! Open the file and the dataset.
!
CALL H5Fopen_f(H5FILE_NAME, H5F_ACC_RDONLY_F, file, hdferr)
CALL H5Dopen_f(file, DATASETNAME, dataset,hdferr)
!
! Create a data type for s2
!
CALL H5Tcreate_f(H5T_COMPOUND_F, H5OFFSETOF(C_LOC(s2(1)), C_LOC(s2(2))), s2_tid, hdferr)
CALL H5Tinsert_f(s2_tid, "chr_name", H5OFFSETOF(C_LOC(s2(1)),C_LOC(s2(1)%chr)), tid3, hdferr)
CALL H5Tinsert_f(s2_tid, "c_name", H5OFFSETOF(C_LOC(s2(1)),C_LOC(s2(1)%c)), h5kind_to_type(r_k8,H5_REAL_KIND), hdferr)
CALL H5Tinsert_f(s2_tid, "a_name", H5OFFSETOF(C_LOC(s2(1)),C_LOC(s2(1)%a)), h5kind_to_type(int_k1,H5_INTEGER_KIND), hdferr)
!
! Read two fields c and a from s1 dataset. Fields in the file
! are found by their names "c_name" and "a_name".
s2(:)%c=-1; s2(:)%a=-1;
f_ptr = C_LOC(s2(1))
CALL H5Dread_f(dataset, s2_tid, f_ptr, hdferr)
!
! Display the fields
!
DO i = 1, length
WRITE(*,'(/,A,/,999(A,1X))') "Field chr :", s2(i)%chr(1:13)(1:1)
ENDDO
WRITE(*,'(/,A,/,999(F8.4,1X))') "Field c :", s2(:)%c
WRITE(*,'(/,A,/,999(I0,1X))') "Field a :", s2(:)%a
!
! Create a data type for s3.
!
CALL H5Tcreate_f(H5T_COMPOUND_F, H5OFFSETOF(C_LOC(s3(1)),C_LOC(s3(2))),s3_tid, hdferr)
CALL H5Tinsert_f(s3_tid, "b_name", 0_size_t, h5kind_to_type(r_k4,H5_REAL_KIND), hdferr)
!
! Read field b from s1 dataset. Field in the file is found by its name.
!
s3(:)=-1
f_ptr = C_LOC(s3(1))
CALL H5Dread_f(dataset, s3_tid, f_ptr, hdferr)
!
! Display the field
!
WRITE(*,'(/,A,/,999(F8.4,1X))') "Field b :",s3(:)
!
! Release resources
!
CALL H5Tclose_f(s2_tid, hdferr)
CALL H5Tclose_f(s3_tid, hdferr)
CALL H5Dclose_f(dataset, hdferr)
CALL H5Fclose_f(file, hdferr)
END PROGRAM main
|
