-
-
Notifications
You must be signed in to change notification settings - Fork 269
/
Copy pathh5ex_t_regrefatt.c
263 lines (225 loc) · 8.33 KB
/
h5ex_t_regrefatt.c
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
/************************************************************
This example shows how to read and write region references
to an attribute. The program first creates a dataset
containing characters and writes references to region of
the dataset to a new attribute with a dataspace of DIM0,
then closes the file. Next, it reopens the file,
dereferences the references, and outputs the referenced
regions to the screen.
************************************************************/
#include "hdf5.h"
#include <stdio.h>
#include <stdlib.h>
#define FILENAME "h5ex_t_regrefatt.h5"
#define DATASET "DS1"
#define DATASET2 "DS2"
#define ATTRIBUTE "A1"
#define DIM0 2
#define DS2DIM0 3
#define DS2DIM1 16
int
main(void)
{
hid_t file = H5I_INVALID_HID; /* File Handle */
hid_t space = H5I_INVALID_HID; /* Dataspace Handle */
hid_t dset = H5I_INVALID_HID; /* Dataset Handle */
hid_t dset2 = H5I_INVALID_HID; /* Dataset Handle */
hid_t memspace = H5I_INVALID_HID; /* Mem dataspace */
hid_t attr = H5I_INVALID_HID; /* Attribute dataspace */
herr_t status;
hsize_t dims[1] = {DIM0};
hsize_t dims2[2] = {DS2DIM0, DS2DIM1};
hsize_t coords[4][2] = {{0, 1}, {2, 11}, {1, 0}, {2, 4}};
hsize_t start[2] = {0, 0};
hsize_t stride[2] = {2, 11};
hsize_t count[2] = {2, 2};
hsize_t block[2] = {1, 3};
hssize_t npoints;
ssize_t size;
char *name = NULL;
int ndims;
hsize_t i;
char wdata2[DS2DIM0][DS2DIM1] = {"The quick brown", "fox jumps over ", "the 5 lazy dogs"};
char *rdata2 = NULL;
#if H5_VERSION_GE(1, 12, 0) && !defined(H5_USE_110_API) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
hid_t ref_type = H5T_STD_REF; /* Reference datatype */
H5R_ref_t wdata[DIM0]; /* buffer to write to disk */
H5R_ref_t *rdata = NULL; /* buffer to read into*/
H5R_type_t objtype; /* Reference type */
#else
hid_t ref_type = H5T_STD_REF_DSETREG; /* Reference datatype */
hdset_reg_ref_t wdata[DIM0]; /* Write buffer */
hdset_reg_ref_t *rdata = NULL; /* Read buffer */
H5O_type_t objtype;
#endif
/*
* Create a new file using the default properties.
*/
file = H5Fcreate(FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
if (file < 0)
goto done;
/*
* Create a dataset with character data.
*/
space = H5Screate_simple(2, dims2, NULL);
dset2 = H5Dcreate(file, DATASET2, H5T_STD_I8LE, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
if (dset2 < 0)
goto done;
status = H5Dwrite(dset2, H5T_NATIVE_CHAR, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata2);
/*
* Create reference to a list of elements in dset2.
*/
status = H5Sselect_elements(space, H5S_SELECT_SET, 4, coords[0]);
#if H5_VERSION_GE(1, 12, 0) && !defined(H5_USE_110_API) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
status = H5Rcreate_region(file, DATASET2, space, H5P_DEFAULT, &wdata[0]);
#else
status = H5Rcreate(&wdata[0], file, DATASET2, H5R_DATASET_REGION, space);
#endif
if (status < 0)
goto done;
/*
* Create reference to a hyperslab in dset2, close dataspace.
*/
status = H5Sselect_hyperslab(space, H5S_SELECT_SET, start, stride, count, block);
#if H5_VERSION_GE(1, 12, 0) && !defined(H5_USE_110_API) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
status = H5Rcreate_region(file, DATASET2, space, H5P_DEFAULT, &wdata[1]);
#else
status = H5Rcreate(&wdata[1], file, DATASET2, H5R_DATASET_REGION, space);
#endif
if (status < 0)
goto done;
status = H5Sclose(space);
/*
* Create dataset with a null dataspace to serve as the parent for
* the attribute.
*/
space = H5Screate(H5S_NULL);
dset = H5Dcreate(file, DATASET, H5T_STD_I32LE, space, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
status = H5Sclose(space);
/*
* Create dataspace. Setting maximum size to NULL sets the maximum
* size to be the current size.
*/
space = H5Screate_simple(1, dims, NULL);
/*
* Create the attribute and write the region references to it.
*/
attr = H5Acreate(dset, ATTRIBUTE, ref_type, space, H5P_DEFAULT, H5P_DEFAULT);
if (attr < 0)
goto done;
status = H5Awrite(attr, ref_type, wdata);
/*
* Close and release resources.
*/
#if H5_VERSION_GE(1, 12, 0) && !defined(H5_USE_110_API) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
status = H5Rdestroy(&wdata[0]);
status = H5Rdestroy(&wdata[1]);
#endif
status = H5Aclose(attr);
status = H5Dclose(dset);
status = H5Dclose(dset2);
status = H5Sclose(space);
status = H5Fclose(file);
/*
* Now we begin the read section of this example. Here we assume
* the attribute has the same name and rank, but can have any size.
* Therefore we must allocate a new array to read in data using
* malloc().
*/
/*
* Open file, dataset, and attribute.
*/
file = H5Fopen(FILENAME, H5F_ACC_RDONLY, H5P_DEFAULT);
if (file < 0)
goto done;
dset = H5Dopen(file, DATASET, H5P_DEFAULT);
if (dset < 0)
goto done;
attr = H5Aopen(dset, ATTRIBUTE, H5P_DEFAULT);
if (attr < 0)
goto done;
/*
* Get dataspace and allocate memory for read buffer.
*/
space = H5Aget_space(attr);
ndims = H5Sget_simple_extent_dims(space, dims, NULL);
#if H5_VERSION_GE(1, 12, 0) && !defined(H5_USE_110_API) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
rdata = (H5R_ref_t *)malloc(dims[0] * sizeof(H5R_ref_t));
#else
rdata = (hdset_reg_ref_t *)malloc(dims[0] * sizeof(hdset_reg_ref_t));
#endif
status = H5Sclose(space);
/*
* Read the data.
*/
status = H5Aread(attr, ref_type, rdata);
/*
* Output the data to the screen.
*/
for (i = 0; i < dims[0]; i++) {
printf("%s[%" PRIuHSIZE "]:\n ->", ATTRIBUTE, i);
/*
* Open the referenced object, retrieve its region as a
* dataspace selection.
*/
#if H5_VERSION_GE(1, 10, 0) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
#if H5_VERSION_GE(1, 12, 0) && !defined(H5_USE_110_API) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
dset2 = H5Ropen_object(&rdata[i], H5P_DEFAULT, H5P_DEFAULT);
space = H5Ropen_region(&rdata[i], H5P_DEFAULT, H5P_DEFAULT);
#else
dset2 = H5Rdereference(dset, H5P_DEFAULT, H5R_DATASET_REGION, &rdata[i]);
space = H5Rget_region(dset, H5R_DATASET_REGION, &rdata[i]);
#endif
#else
dset2 = H5Rdereference(dset, H5R_DATASET_REGION, &rdata[i]);
space = H5Rget_region(dset, H5R_DATASET_REGION, &rdata[i]);
#endif
if (dset2 < 0)
goto done;
/*
* Get the length of the object's name, allocate space, then
* retrieve the name.
*/
size = 1 + H5Iget_name(dset2, NULL, 0);
name = (char *)malloc(size);
size = H5Iget_name(dset2, name, size);
/*
* Allocate space for the read buffer. We will only allocate
* enough space for the selection, plus a null terminator. The
* read buffer will be 1-dimensional.
*/
npoints = H5Sget_select_npoints(space);
rdata2 = (char *)malloc(npoints + 1);
/*
* Read the dataset region, and add a null terminator so we can
* print it as a string.
*/
memspace = H5Screate_simple(1, (hsize_t *)&npoints, NULL);
status = H5Dread(dset2, H5T_NATIVE_CHAR, memspace, space, H5P_DEFAULT, rdata2);
rdata2[npoints] = '\0';
/*
* Print the name and region data, close and release resources.
*/
printf(" %s: %s\n", name, rdata2);
free(rdata2);
free(name);
#if H5_VERSION_GE(1, 12, 0) && !defined(H5_USE_110_API) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
status = H5Rdestroy(&rdata[i]);
#endif
status = H5Sclose(space);
status = H5Sclose(memspace);
status = H5Dclose(dset2);
}
/*
* Close and release resources.
*/
free(rdata);
status = H5Aclose(attr);
#if H5_VERSION_LE(1, 11, 0)
status = H5Dclose(dset);
#endif
status = H5Fclose(file);
return 0;
done:
return 1;
}