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132 lines
3.4 KiB
132 lines
3.4 KiB
/* -*- c-file-style: "stroustrup" -*- */
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#include "hdf5.h"
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#include <stdio.h>
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#include <stdlib.h>
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int
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main(void)
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{
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int ret_val = EXIT_SUCCESS;
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//! <!-- [create] -->
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{
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__label__ fail_dspace;
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hid_t dspace;
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// create a 2D chess board shape (8x8)
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if ((dspace = H5Screate_simple(2, (hsize_t[]){8, 8}, NULL)) == H5I_INVALID_HID) {
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ret_val = EXIT_FAILURE;
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goto fail_dspace;
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}
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H5Sclose(dspace);
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fail_dspace:;
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}
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//! <!-- [create] -->
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//! <!-- [read] -->
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{
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__label__ fail_dspace;
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hid_t dspace;
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if ((dspace = H5Screate(H5S_NULL)) == H5I_INVALID_HID) {
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ret_val = EXIT_FAILURE;
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goto fail_dspace;
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}
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// make changes to the selection on DSPACE
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// ...
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// parse the resulting selection
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switch (H5Sget_select_type(dspace)) {
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case H5S_SEL_HYPERSLABS:
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// we are dealing with a hyperslab selection
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// determine the regularity and block structure
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break;
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case H5S_SEL_POINTS:
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// we are dealing with a point selection
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// for example, retrieve the point list
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break;
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case H5S_SEL_ALL:
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// all dataset elements are selected
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break;
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case H5S_SEL_NONE:
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// the selection is empty
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break;
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default:
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ret_val = EXIT_FAILURE;
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break;
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}
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if (dspace != H5S_ALL)
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H5Sclose(dspace);
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fail_dspace:;
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}
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//! <!-- [read] -->
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//! <!-- [update] -->
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{
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__label__ fail_select, fail_dspace;
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hid_t dspace;
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// create a 2D chess board shape (8x8)
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if ((dspace = H5Screate_simple(2, (hsize_t[]){8, 8}, NULL)) == H5I_INVALID_HID) {
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ret_val = EXIT_FAILURE;
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goto fail_dspace;
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}
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// select all black fields: do this w/ a hyperslab union in two steps
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// select the black fields on even rows
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if (H5Sselect_hyperslab(dspace, H5S_SELECT_SET, (hsize_t[]){0, 0}, (hsize_t[]){2, 2},
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(hsize_t[]){4, 4}, NULL) < 0) {
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ret_val = EXIT_FAILURE;
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goto fail_select;
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}
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// select the black fields on odd rows
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// notice the H5S_SELECT_OR operator
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if (H5Sselect_hyperslab(dspace, H5S_SELECT_OR, (hsize_t[]){1, 1}, (hsize_t[]){2, 2},
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(hsize_t[]){4, 4}, NULL) < 0) {
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ret_val = EXIT_FAILURE;
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goto fail_select;
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}
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// should be 32
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printf("%lld elements selected.\n", H5Sget_select_npoints(dspace));
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fail_select:
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H5Sclose(dspace);
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fail_dspace:;
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}
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//! <!-- [update] -->
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//! <!-- [delete] -->
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{
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__label__ fail_select, fail_dspace;
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hid_t dspace;
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if ((dspace = H5Screate(H5S_NULL)) == H5I_INVALID_HID) {
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ret_val = EXIT_FAILURE;
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goto fail_dspace;
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}
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// make changes to and work with the selection on DSPACE
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// ...
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// finally, clear the selection
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if (H5Sselect_none(dspace) < 0) {
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ret_val = EXIT_FAILURE;
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goto fail_select;
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}
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fail_select:
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if (dspace != H5S_ALL)
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H5Sclose(dspace);
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fail_dspace:;
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}
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//! <!-- [delete] -->
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return ret_val;
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}
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