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
|
! ***********************************************************
!
! this example shows how to set the space allocation time
! for a dataset. the program first creates two datasets,
! one with the default allocation time (late) and one with
! early allocation time, and displays whether each has been
! allocated and their allocation size. next, it writes data
! to the datasets, and again displays whether each has been
! allocated and their allocation size.
!
! this file is intended for use with hdf5 library version 1.8
!
! ***********************************************************
PROGRAM main
USE HDF5
IMPLICIT NONE
CHARACTER(LEN=15), PARAMETER :: filename = "h5ex_d_alloc.h5"
CHARACTER(LEN=3) , PARAMETER :: dataset1 = "DS1"
CHARACTER(LEN=3) , PARAMETER :: dataset2 = "DS2"
INTEGER , PARAMETER :: dim0 = 4
INTEGER , PARAMETER :: dim1 = 7
INTEGER , PARAMETER :: fillval = 99
INTEGER , PARAMETER :: rank = 2
INTEGER :: space_status
INTEGER :: i, j
INTEGER :: hdferr
INTEGER(HID_T) :: file, space, dset1, dset2, dcpl ! handles
INTEGER(HSIZE_T) :: storage_size
INTEGER(HSIZE_T), DIMENSION(1:2) :: dims = (/dim0, dim1/) ! size write buffer
INTEGER , DIMENSION(1:dim0,1:dim1) :: wdata ! write buffer
!
! Initialize FORTRAN interface.
!
CALL h5open_f(hdferr)
!
! Initialize data.
!
DO i = 1, dim0
DO j = 1, dim1
wdata(i,j) = i*j-j
ENDDO
ENDDO
!
! Create a new file using the default properties.
!
CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file, hdferr)
!
! Create dataspace.
!
CALL h5screate_simple_f(rank, dims, space, hdferr)
!
! Create the dataset creation property list, and set the chunk size.
!
CALL h5pcreate_f(H5P_DATASET_CREATE_F, dcpl, hdferr)
!
! Set the allocation time to "early". This way we can be sure
! that reading from the dataset immediately after creation will
! return the fill value.
!
CALL h5pset_alloc_time_f(dcpl, H5D_ALLOC_TIME_EARLY_F,hdferr)
!
WRITE(*,'(/,"Creating datasets...",/)')
WRITE(*,'(A," has allocation time H5D_ALLOC_TIME_LATE_F")') dataset1
WRITE(*,'(A," has allocation time H5D_ALLOC_TIME_EARLY_F"/)') dataset2
!
! Create the dataset using the dataset creation property list.
!
CALL h5dcreate_f(file, dataset1, H5T_STD_I32LE, space, dset1, hdferr)
CALL h5dcreate_f(file, dataset2, H5T_STD_I32LE, space, dset2, hdferr, dcpl)
!
! Retrieve and print space status and storage size for dset1.
!
storage_size = 0
CALL h5dget_space_status_f(dset1, space_status, hdferr)
CALL h5dget_storage_size_f(dset1, storage_size, hdferr)
!
IF(space_status.EQ.H5D_SPACE_STS_ALLOCATED_F)THEN
WRITE(*,'("Space for ",A," has been allocated.")') dataset1
ELSE
WRITE(*,'("Space for ",A," has not been allocated.")') dataset1
END IF
WRITE(*,'("Storage size for ",A," is: ",I0," bytes.")') dataset1, storage_size
!
! Retrieve and print space status and storage size for dset2.
!
CALL h5dget_space_status_f(dset2, space_status, hdferr)
CALL h5dget_storage_size_f(dset2, storage_size, hdferr)
!
IF(space_status.EQ.H5D_SPACE_STS_ALLOCATED_F)THEN
WRITE(*,'("Space for ",A," has been allocated.")') dataset2
ELSE
WRITE(*,'("Space for ",A," has not been allocated.")') dataset2
END IF
WRITE(*,'("Storage size for ",A," is: ",I0," bytes.")') dataset2, storage_size
!
WRITE(*,'(/,"Writing data...",/)')
!
! Write the data to the datasets.
!
CALL h5dwrite_f(dset1, H5T_NATIVE_INTEGER, wdata, dims, hdferr)
CALL h5dwrite_f(dset2, H5T_NATIVE_INTEGER, wdata, dims, hdferr)
!
! Retrieve and print space status and storage size for dset1.
!
CALL h5dget_space_status_f(dset1, space_status, hdferr)
CALL h5dget_storage_size_f(dset1, storage_size, hdferr)
!
IF(space_status.EQ.H5D_SPACE_STS_ALLOCATED_F)THEN
WRITE(*,'("Space for ",A," has been allocated.")') dataset1
ELSE
WRITE(*,'("Space for ",A," has not been allocated.")') dataset1
END IF
WRITE(*,'("Storage size for ",A," is: ",I0," bytes.")') dataset1, storage_size
!
! Retrieve and print space status and storage size for dset2.
!
CALL h5dget_space_status_f(dset2, space_status, hdferr)
CALL h5dget_storage_size_f(dset2, storage_size, hdferr)
!
IF(space_status.EQ.H5D_SPACE_STS_ALLOCATED_F)THEN
WRITE(*,'("Space for ",A," has been allocated.")') dataset2
ELSE
WRITE(*,'("Space for ",A," has not been allocated.")') dataset2
END IF
WRITE(*,'("Storage size for ",A," is: ",I0," bytes.",/)') dataset2, storage_size
!
! Close and release resources.
!
CALL h5pclose_f(dcpl , hdferr)
CALL h5dclose_f(dset1, hdferr)
CALL h5dclose_f(dset2, hdferr)
CALL h5sclose_f(space, hdferr)
CALL h5fclose_f(file , hdferr)
!
END PROGRAM main
|
