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
|
/*
* Copyright (C) 1998 Spizella Software
* All rights reserved.
*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Friday, January 30, 1998
*
* Purpose: Tests extendible datasets.
*/
#include <assert.h>
#include <hdf5.h>
#define NX 100 /* USE AN EVEN NUMBER!*/
#define NY 100 /* USE AN EVEN NUMBER!*/
/*-------------------------------------------------------------------------
* Function: main
*
* Purpose: Tests extendible datasets
*
* Return: Success: exit(0)
*
* Failure: exit(non-zero)
*
* Programmer: Robb Matzke
* Friday, January 30, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
int
main (void)
{
hid_t file, dataset, mem_space, file_space, cparms;
herr_t status;
int i, j, k, m;
static int buf1[NY][NX], buf2[NX/2][NY/2];
static const hsize_t dims[2] = {NX, NY};
static const hsize_t half_dims[2] = {NX/2, NY/2};
static const hsize_t chunk_dims[2] = {NX/2, NY/2};
static hsize_t maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
static hsize_t size[2];
hssize_t offset[2];
/* Initialize buffer and space */
for (i=0; i<NX; i++) {
for (j=0; j<NY; j++) {
buf1[i][j] = i*NY+j;
}
}
mem_space = H5Screate_simple (2, dims, maxdims);
assert (mem_space>=0);
/* Create the file */
file = H5Fcreate ("extend.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
assert (file>=0);
/* Create the dataset which is originally NX by NY */
cparms = H5Pcreate (H5P_DATASET_CREATE);
assert (cparms>=0);
status = H5Pset_chunk (cparms, 2, chunk_dims);
assert (status>=0);
dataset = H5Dcreate (file, "dataset", H5T_NATIVE_INT, mem_space, cparms);
assert (dataset>=0);
H5Pclose (cparms);
/* Write the data */
for (i=0; i<5; i++) {
for (j=0; j<5; j++) {
/* Extend the dataset */
offset[0] = i * NX;
offset[1] = j * NY;
size[0] = offset[0] + NX;
size[1] = offset[1] + NY;
status = H5Dextend (dataset, size);
assert (status>=0);
/* Select a hyperslab */
file_space = H5Dget_space (dataset);
assert (file_space>=0);
status = H5Sset_hyperslab (file_space, offset, dims, NULL);
assert (status>=0);
/* Write to the hyperslab */
status = H5Dwrite (dataset, H5T_NATIVE_INT, mem_space, file_space,
H5P_DEFAULT, buf1);
assert (status>=0);
H5Sclose (file_space);
}
}
H5Sclose (mem_space);
/* Read the data */
mem_space = H5Screate_simple (2, half_dims, NULL);
file_space = H5Dget_space (dataset);
for (i=0; i<10; i++) {
for (j=0; j<10; j++) {
/* Select a hyperslab */
offset[0] = i * NX/2;
offset[1] = j * NY/2;
assert (file_space>=0);
status = H5Sset_hyperslab (file_space, offset, half_dims, NULL);
assert (status>=0);
/* Read */
status = H5Dread (dataset, H5T_NATIVE_INT, mem_space, file_space,
H5P_DEFAULT, buf2);
assert (status>=0);
/* Compare */
for (k=0; k<NX/2; k++) {
for (m=0; m<NY/2; m++) {
assert (buf2[k][m]==buf1[(i%2)*NX/2+k][(j%2)*NY/2+m]);
}
}
}
}
H5Dclose (dataset);
H5Fclose (file);
return 0;
}
|
