summaryrefslogtreecommitdiffstats
path: root/c++/test/trefer.cpp
blob: 66fa040273dc8c173fa87ab48d598f678ac0376a (plain)
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
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * 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 COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*****************************************************************************
   FILE
   trefer.cpp - HDF5 C++ testing the functionalities associated with the C
                Reference interface (H5R)

 ***************************************************************************/
#include <iostream>
using std::cerr;
using std::endl;

#include <string>
#include "H5Cpp.h" // C++ API header file
using namespace H5;

#include "h5test.h"
#include "h5cpputil.h" // C++ utilility header file

const H5std_string FILE1("trefer1.h5");
const H5std_string FILE2("trefer2.h5");

// Dataset 1
const H5std_string DSET1_NAME("Dataset1");
const H5std_string DSET2_NAME("Dataset2");

const H5std_string MEMBER1("a_name");
const H5std_string MEMBER2("b_name");
const H5std_string MEMBER3("c_name");

// 1-D dataset with fixed dimensions
const int SPACE1_RANK = 1;
const int SPACE1_DIM1 = 4;

/* Larger 1-D dataset with fixed dimensions */
const int SPACE3_RANK = 1;
const int SPACE3_DIM1 = 100;

/* Element selection information */
const int POINT1_NPOINTS = 10;

// Compound datatype
typedef struct s1_t {
    unsigned int a;
    unsigned int b;
    float        c;
} s1_t;

/*-------------------------------------------------------------------------
 * Function:    test_reference_params
 *
 * Purpose      Test basic H5R (reference) parameters for correct processing
 *
 * Return       None
 *-------------------------------------------------------------------------
 */
static void
test_reference_params()
{
    const char *write_comment = "Foo!"; /* Comments for group */

    // Output message about test being performed
    SUBTEST("Object Reference Parameters");

    H5File *file1 = NULL;
    try {
        hobj_ref_t *wbuf, // buffer to write to disk
            *rbuf,        // buffer read from disk
            *tbuf;        // temp. buffer read from disk

        // Allocate write & read buffers
        int temp_size = MAX(sizeof(unsigned), sizeof(hobj_ref_t));
        wbuf          = static_cast<hobj_ref_t *>(HDmalloc(temp_size * SPACE1_DIM1));
        rbuf          = static_cast<hobj_ref_t *>(HDmalloc(temp_size * SPACE1_DIM1));
        tbuf          = static_cast<hobj_ref_t *>(HDmalloc(temp_size * SPACE1_DIM1));

        // Create file FILE1
        file1 = new H5File(FILE1, H5F_ACC_TRUNC);

        // Create dataspace for datasets
        hsize_t   dims1[] = {SPACE1_DIM1};
        DataSpace sid1(SPACE1_RANK, dims1);

        // Create a group
        Group group = file1->createGroup("Group1");

        // Set group's comment
        group.setComment(".", write_comment);

        // Create a dataset (inside /Group1)
        DataSet dataset = group.createDataSet(DSET1_NAME, PredType::NATIVE_UINT, sid1);

        unsigned *tu32; // Temporary pointer to uint32 data
        int       i;
        for (tu32 = reinterpret_cast<unsigned *>(wbuf), i = 0; i < SPACE1_DIM1; i++)
            *tu32++ = i * 3; // from C test

        // Write selection to disk
        dataset.write(wbuf, PredType::NATIVE_UINT);

        // Close Dataset
        dataset.close();

        // Create another dataset (inside /Group1)
        dataset = group.createDataSet("Dataset2", PredType::NATIVE_UCHAR, sid1);

        // Close Dataset
        dataset.close();

        // Create a datatype to refer to
        CompType dtype1(sizeof(s1_t));

        // Insert fields
        dtype1.insertMember(MEMBER1, HOFFSET(s1_t, a), PredType::NATIVE_INT);
        dtype1.insertMember(MEMBER2, HOFFSET(s1_t, b), PredType::NATIVE_INT);
        dtype1.insertMember(MEMBER3, HOFFSET(s1_t, c), PredType::NATIVE_FLOAT);

        // Save datatype for later
        dtype1.commit(group, "Datatype1");

        // Close datatype and group
        dtype1.close();
        group.close();

        // Create a dataset
        dataset = file1->createDataSet("Dataset3", PredType::STD_REF_OBJ, sid1);

        /* Test parameters to H5Location::reference */
        try {
            file1->reference(NULL, "/Group1/Dataset1");
        }
        catch (ReferenceException &E) {
        } // We expect this to fail
        try {
            file1->reference(&wbuf[0], NULL);
        }
        catch (ReferenceException &E) {
        } // We expect this to fail
        try {
            file1->reference(&wbuf[0], "");
        }
        catch (ReferenceException &E) {
        } // We expect this to fail
        try {
            file1->reference(&wbuf[0], "/Group1/Dataset1", H5R_MAXTYPE);
        }
        catch (ReferenceException &E) {
        } // We expect this to fail
        try {
            file1->reference(&wbuf[0], "/Group1/Dataset1", H5R_DATASET_REGION);
        }
        catch (ReferenceException &E) {
        } // We expect this to fail

        // Close resources
        dataset.close();
        file1->close();
        // Let sid1 go out of scope

        // Free memory buffers
        HDfree(wbuf);
        HDfree(rbuf);
        HDfree(tbuf);

        PASSED();
    } // end try
    catch (Exception &E) {
        issue_fail_msg("test_reference_param()", __LINE__, __FILE__, E.getCFuncName(), E.getCDetailMsg());
    }

    delete file1;
} /* test_reference_param() */

/*-------------------------------------------------------------------------
 * Function:    test_reference_obj
 *
 * Purpose      Test basic object reference functions to various kinds
 *              of objects
 *
 * Return       None
 *-------------------------------------------------------------------------
 */
static void
test_reference_obj()
{
    int                i;                      // counting variables
    const H5std_string write_comment = "Foo!"; // Comments for group

    // Output message about test being performed
    SUBTEST("Object Reference Functions");

    H5File *file1 = NULL;
    try {
        hobj_ref_t *wbuf, // buffer to write to disk
            *rbuf,        // buffer read from disk
            *tbuf;        // temp. buffer read from disk

        // Allocate write & read buffers
        int temp_size = MAX(sizeof(unsigned), sizeof(hobj_ref_t));
        wbuf          = static_cast<hobj_ref_t *>(HDmalloc(temp_size * SPACE1_DIM1));
        rbuf          = static_cast<hobj_ref_t *>(HDmalloc(temp_size * SPACE1_DIM1));
        tbuf          = static_cast<hobj_ref_t *>(HDmalloc(temp_size * SPACE1_DIM1));

        // Create file FILE1
        file1 = new H5File(FILE1, H5F_ACC_TRUNC);

        // Create dataspace for datasets
        hsize_t   dims1[] = {SPACE1_DIM1};
        DataSpace sid1(SPACE1_RANK, dims1);

        // Create dataset access property list
        PropList dapl(H5P_DATASET_ACCESS);

        // Create a group
        Group group = file1->createGroup("Group1");

        // Set group's comment
        group.setComment(".", write_comment);

        // Create a dataset (inside /Group1)
        DataSet dataset = group.createDataSet(DSET1_NAME, PredType::NATIVE_UINT, sid1);

        unsigned *tu32; // Temporary pointer to uint32 data
        for (tu32 = reinterpret_cast<unsigned *>(wbuf), i = 0; i < SPACE1_DIM1; i++)
            *tu32++ = i * 3; // from C test

        // Write selection to disk
        dataset.write(wbuf, PredType::NATIVE_UINT);

        // Close Dataset
        dataset.close();

        // Create another dataset (inside /Group1)
        dataset = group.createDataSet("Dataset2", PredType::NATIVE_UCHAR, sid1);

        // Close Dataset
        dataset.close();

        // Create a datatype to refer to
        CompType dtype1(sizeof(s1_t));

        // Insert fields
        dtype1.insertMember(MEMBER1, HOFFSET(s1_t, a), PredType::NATIVE_INT);
        dtype1.insertMember(MEMBER2, HOFFSET(s1_t, b), PredType::NATIVE_INT);
        dtype1.insertMember(MEMBER3, HOFFSET(s1_t, c), PredType::NATIVE_FLOAT);

        // Save datatype for later
        dtype1.commit(group, "Datatype1");

        // Close datatype and group
        dtype1.close();
        group.close();

        // Create a dataset
        dataset = file1->createDataSet("Dataset3", PredType::STD_REF_OBJ, sid1);

        // Create reference to dataset and test getRefObjType
        file1->reference(&wbuf[0], "/Group1/Dataset1");
        H5O_type_t refobj_type = dataset.getRefObjType(&wbuf[0], H5R_OBJECT);
        verify_val(static_cast<long>(refobj_type), static_cast<long>(H5O_TYPE_DATASET),
                   "DataSet::getRefObjType", __LINE__, __FILE__);

        // Create reference to dataset and test getRefObjType
        file1->reference(&wbuf[1], "/Group1/Dataset2");
        refobj_type = dataset.getRefObjType(&wbuf[1], H5R_OBJECT);
        verify_val(static_cast<long>(refobj_type), static_cast<long>(H5O_TYPE_DATASET),
                   "DataSet::getRefObjType", __LINE__, __FILE__);

        // Create reference to group
        file1->reference(&wbuf[2], "/Group1");
        refobj_type = dataset.getRefObjType(&wbuf[2], H5R_OBJECT);
        verify_val(static_cast<long>(refobj_type), static_cast<long>(H5O_TYPE_GROUP),
                   "DataSet::getRefObjType", __LINE__, __FILE__);

        // Create reference to named datatype
        file1->reference(&wbuf[3], "/Group1/Datatype1");
        refobj_type = dataset.getRefObjType(&wbuf[3], H5R_OBJECT);
        verify_val(static_cast<long>(refobj_type), static_cast<long>(H5O_TYPE_NAMED_DATATYPE),
                   "DataSet::getRefObjType", __LINE__, __FILE__);

        // Write selection to disk
        dataset.write(wbuf, PredType::STD_REF_OBJ);

        // Close disk dataspace, dataset, and file
        sid1.close();
        dataset.close();
        delete file1;

        // Re-open the file
        file1 = new H5File(FILE1, H5F_ACC_RDWR);

        // Open the dataset
        dataset = file1->openDataSet("/Dataset3");

        // Read selection from disk
        dataset.read(rbuf, PredType::STD_REF_OBJ);

        // Dereference dataset object by ctor, from the location where
        // 'dataset' is located
        DataSet dset2(dataset, &rbuf[0], H5R_OBJECT, dapl);

        // Check information in the referenced dataset
        sid1                = dset2.getSpace();
        hssize_t n_elements = sid1.getSimpleExtentNpoints();
        verify_val(static_cast<long>(n_elements), 4, "DataSpace::getSimpleExtentNpoints", __LINE__, __FILE__);

        // Read from disk
        dset2.read(tbuf, PredType::NATIVE_UINT);

        for (tu32 = reinterpret_cast<unsigned *>(tbuf), i = 0; i < SPACE1_DIM1; i++, tu32++)
            verify_val(*tu32, static_cast<uint32_t>(i * 3), "DataSpace::getSimpleExtentNpoints", __LINE__,
                       __FILE__);

        // Close dereferenced dataset
        dset2.close();

        // Dereference group object from the location where 'dataset' is located
        group.dereference(dataset, &rbuf[2]);

        // Get group's comment using
        // H5std_string getComment(const char* name, <buf_size=0 by default>)
        H5std_string read_comment1 = group.getComment(".", 10);
        verify_val(read_comment1.c_str(), write_comment, "Group::getComment", __LINE__, __FILE__);

        // Test with the old default value
        read_comment1 = group.getComment(".", 256);
        verify_val(read_comment1.c_str(), write_comment, "Group::getComment", __LINE__, __FILE__);

        // Test that getComment handles failures gracefully, using
        // H5std_string getComment(const char* name, <buf_size=0 by default>)
        try {
            H5std_string read_comment_tmp = group.getComment(NULL);
        }
        catch (Exception &E) {
        } // We expect this to fail

        // Close group
        group.close();

        /*
         * Verify correct referenced datatype
         */
        // Open datatype object
        dtype1.dereference(dataset, &rbuf[3]);

        // Verify correct datatype
        H5T_class_t tclass;

        tclass = dtype1.getClass();
        verify_val(static_cast<long>(tclass), static_cast<long>(H5T_COMPOUND), "DataType::getClass", __LINE__,
                   __FILE__);
        int n_members = dtype1.getNmembers();
        verify_val(n_members, 3, "CompType::getNmembers", __LINE__, __FILE__);

        // Close all objects and file
        dtype1.close();
        dataset.close();
        file1->close();

        // Free allocated buffers
        HDfree(wbuf);
        HDfree(rbuf);
        HDfree(tbuf);

        PASSED();
    } // end try
    catch (Exception &E) {
        issue_fail_msg("test_reference_obj()", __LINE__, __FILE__, E.getCFuncName(), E.getCDetailMsg());
    }

    delete file1;
} // test_reference_obj()

/*-------------------------------------------------------------------------
 * Function:    test_reference_group
 *
 * Purpose      Test object reference functionality on group.
 *
 * Return       None
 *-------------------------------------------------------------------------
 */
#define GROUPNAME  "/group"
#define GROUPNAME2 "group2"
#define GROUPNAME3 "group3"
#define DSETNAME   "/dset"
#define DSETNAME2  "dset2"

static void
test_reference_group()
{
    hobj_ref_t         wref;                   /* Reference to write */
    hobj_ref_t         rref;                   /* Reference to read */
    const H5std_string write_comment = "Foo!"; // Comments for group

    // Output message about test being performed
    SUBTEST("Object Reference to Group");

    H5File *file1 = NULL;
    try {
        /*
         * Create file with a group and a dataset containing an object
         *  reference to the group
         */

        // Create file FILE1
        file1 = new H5File(FILE1, H5F_ACC_TRUNC);

        // Create scalar dataspace
        DataSpace sid1;

        // Create a group
        Group group = file1->createGroup(GROUPNAME);

        /* Create nested groups */
        Group group2 = group.createGroup(GROUPNAME2);
        group2.close();
        group2 = group.createGroup(GROUPNAME3);
        group2.close();

        // Create bottom dataset
        DataSet dset1 = group.createDataSet(DSETNAME2, PredType::NATIVE_INT, sid1);
        dset1.close();

        // Close group 1
        group.close();

        // Create dataset
        DataSet dset2 = file1->createDataSet(DSETNAME, PredType::STD_REF_OBJ, sid1);

        file1->reference(&wref, GROUPNAME);

        // Write selection to disk
        dset2.write(&wref, PredType::STD_REF_OBJ);

        // Close resources
        dset2.close();
        sid1.close();
        file1->close();

        /*
         * Re-open the file and test deferencing group
         */

        // Re-open file
        file1->openFile(FILE1, H5F_ACC_RDWR);

        // Re-open dataset
        dset1 = file1->openDataSet(DSETNAME);

        // Read in the reference
        dset1.read(&rref, PredType::STD_REF_OBJ);

        // Dereference to get the group
        Group refgroup(dset1, &rref);

        // Dereference group object the other way
        group.dereference(dset1, &rref);

        /*
         * Various queries on the group opened
         */

        // Check number of objects in the group dereferenced by constructor
        hsize_t nobjs = refgroup.getNumObjs();
        verify_val(static_cast<long>(nobjs), 3, "H5Group::getNumObjs", __LINE__, __FILE__);

        // Check number of objects in the group dereferenced by ::reference
        nobjs = group.getNumObjs();
        verify_val(static_cast<long>(nobjs), 3, "H5Group::getNumObjs", __LINE__, __FILE__);

        // Check getting file name given the group dereferenced via constructor
        H5std_string fname = refgroup.getFileName();
        verify_val(fname, FILE1, "H5Group::getFileName", __LINE__, __FILE__);

        // Check getting file name given the group dereferenced by ::reference
        fname = group.getFileName();
        verify_val(fname, FILE1, "H5Group::getFileName", __LINE__, __FILE__);

        // Check object type using Group::getObjinfo()
        H5O_info2_t oinfo;
        HDmemset(&oinfo, 0, sizeof(oinfo));
        group.getObjinfo(".", H5_INDEX_NAME, H5_ITER_INC, 0, oinfo);
        verify_val(static_cast<long>(oinfo.type), static_cast<long>(H5O_TYPE_DATASET), "Group::getObjinfo",
                   __LINE__, __FILE__);

        // Check for out of bound query by index
        try {
            HDmemset(&oinfo, 0, sizeof(oinfo));
            group.getObjinfo(".", H5_INDEX_NAME, H5_ITER_INC, 9, oinfo);

            // Should FAIL but didn't, so throw an invalid action exception
            throw InvalidActionException("Group::getObjinfo", "Out of bound index.");
        }
        catch (Exception &err) {
        } // do nothing, failure expected

        // Unlink one of the objects in the dereferenced group, and re-check
        refgroup.unlink(GROUPNAME2);
        nobjs = refgroup.getNumObjs();
        verify_val(static_cast<long>(nobjs), 2, "H5Group::getNumObjs", __LINE__, __FILE__);

        // Close resources
        group.close();
        refgroup.close();
        dset1.close();
        file1->close();

        PASSED();
    } // end try
    catch (Exception &E) {
        issue_fail_msg("test_reference_group()", __LINE__, __FILE__, E.getCFuncName(), E.getCDetailMsg());
    }

    delete file1;
} /* test_reference_group() */

/*-------------------------------------------------------------------------
 * Function:    test_reference_region_1D
 *
 * Purpose      Test 1-D reference functionality on various kinds of objects.
 *
 * Return       None
 *-------------------------------------------------------------------------
 */
static void
test_reference_region_1D()
{
    hsize_t  start[SPACE3_RANK];                  /* Starting location of hyperslab */
    hsize_t  stride[SPACE3_RANK];                 /* Stride of hyperslab */
    hsize_t  count[SPACE3_RANK];                  /* Element count of hyperslab */
    hsize_t  block[SPACE3_RANK];                  /* Block size of hyperslab */
    hsize_t  coord1[POINT1_NPOINTS][SPACE3_RANK]; /* Coordinates for point selection */
    hsize_t *coords;                              /* Coordinate buffer */
    hsize_t  low[SPACE3_RANK];                    /* Selection bounds */
    hsize_t  high[SPACE3_RANK];                   /* Selection bounds */
    int      i;                                   /* counting variables */

    // Output message about test being performed
    SUBTEST("1-D Dataset Region Reference Functions");

    try {
        hdset_reg_ref_t *wbuf, // buffer to write to disk
            *rbuf;             // buffer read from disk
        uint8_t *dwbuf,        // Buffer for writing numeric data to disk
            *drbuf;            // Buffer for reading numeric data from disk

        // Allocate write & read buffers
        wbuf  = static_cast<hdset_reg_ref_t *>(HDcalloc(sizeof(hdset_reg_ref_t), SPACE1_DIM1));
        rbuf  = static_cast<hdset_reg_ref_t *>(HDmalloc(sizeof(hdset_reg_ref_t) * SPACE1_DIM1));
        dwbuf = static_cast<uint8_t *>(HDmalloc(sizeof(uint8_t) * SPACE3_DIM1));
        drbuf = static_cast<uint8_t *>(HDcalloc(sizeof(uint8_t), SPACE3_DIM1));

        // Create file FILE1
        H5File file1(FILE2, H5F_ACC_TRUNC);

        // Create dataspace for datasets
        hsize_t   dims3[] = {SPACE3_DIM1};
        DataSpace sid3(SPACE3_RANK, dims3);

        // Create dataset access property list
        PropList dapl(H5P_DATASET_ACCESS);

        // Create a dataset
        DataSet dset3 = file1.createDataSet(DSET2_NAME, PredType::STD_U8LE, sid3);

        uint8_t *tu8; // Temporary pointer to uint8 data
        for (tu8 = dwbuf, i = 0; i < SPACE3_DIM1; i++)
            *tu8++ = static_cast<uint8_t>(i); // from C test

        // Write selection to disk
        dset3.write(dwbuf, PredType::STD_U8LE);

        // Close Dataset
        dset3.close();

        // Create dataspace for datasets
        hsize_t   dims1[] = {SPACE1_DIM1};
        DataSpace sid1(SPACE1_RANK, dims1);

        // Create a dataset
        DataSet dset1 = file1.createDataSet(DSET1_NAME, PredType::STD_REF_DSETREG, sid1);

        /*
         * Create references and prepare for testing
         */

        /* Select 15 2x1 hyperslabs for first reference */
        start[0]  = 2;
        stride[0] = 5;
        count[0]  = 15;
        block[0]  = 2;

        // Select a hyperslab region to add to the current selected region
        sid3.selectHyperslab(H5S_SELECT_SET, count, start, stride, block);

        // Get and verify the number of elements in a dataspace selection
        hssize_t nelms = sid3.getSelectNpoints();
        verify_val(nelms, 30, "DataSet::getRefObjType", __LINE__, __FILE__);

        // Store first dataset region
        file1.reference(&wbuf[0], "/Dataset2", sid3);

        // Get and verify object type
        H5O_type_t obj_type = dset1.getRefObjType(&wbuf[0], H5R_DATASET_REGION);
        verify_val(static_cast<long>(obj_type), static_cast<long>(H5O_TYPE_DATASET), "DataSet::getRefObjType",
                   __LINE__, __FILE__);

        /* Select sequence of ten points for second reference */
        coord1[0][0] = 16;
        coord1[1][0] = 22;
        coord1[2][0] = 38;
        coord1[3][0] = 41;
        coord1[4][0] = 52;
        coord1[5][0] = 63;
        coord1[6][0] = 70;
        coord1[7][0] = 89;
        coord1[8][0] = 97;
        coord1[9][0] = 3;

        // Selects array elements to be included in the selection for sid3
        sid3.selectElements(H5S_SELECT_SET, POINT1_NPOINTS, reinterpret_cast<const hsize_t *>(coord1));

        // Get and verify the number of elements in a dataspace selection
        nelms = sid3.getSelectNpoints();
        verify_val(nelms, 10, "DataSet::getRefObjType", __LINE__, __FILE__);

        // Store first dataset region
        file1.reference(&wbuf[1], "/Dataset2", sid3);

        // Write selection to disk
        dset1.write(wbuf, PredType::STD_REF_DSETREG);

        // Close disk dataspace, dataset, and file
        sid1.close();
        dset1.close();
        sid3.close();
        file1.close();

        /*
         * Testing various dereference functions
         */

        // Re-open the file
        file1.openFile(FILE2, H5F_ACC_RDWR);

        // Open the dataset
        dset1 = file1.openDataSet("/Dataset1");

        // Read selection from disk
        dset1.read(rbuf, PredType::STD_REF_DSETREG);

        { // Test DataSet::dereference
            dset3.dereference(dset1, &rbuf[0], H5R_DATASET_REGION, dapl);

            // Get and verify object type
            obj_type = dset1.getRefObjType(&rbuf[0], H5R_DATASET_REGION);
            verify_val(static_cast<long>(obj_type), static_cast<long>(H5O_TYPE_DATASET),
                       "DataSet::getRefObjType", __LINE__, __FILE__);

            // Get dataspace of dset3 the verify number of elements
            sid1  = dset3.getSpace();
            nelms = sid1.getSimpleExtentNpoints();
            verify_val(static_cast<long>(nelms), 100, "DataSpace::getSimpleExtentNpoints", __LINE__,
                       __FILE__);
        } // End of test DataSet::dereference

        { // Test DataSet constructor -by dereference
            // Dereference dataset object by ctor, from the location where
            // 'dset1' is located
            DataSet newds(dset1, &rbuf[0], H5R_DATASET_REGION, dapl);

            // Get dataspace of newds then verify number of elements
            sid1  = newds.getSpace();
            nelms = sid1.getSimpleExtentNpoints();
            verify_val(static_cast<long>(nelms), 100, "DataSpace::getSimpleExtentNpoints", __LINE__,
                       __FILE__);

            // Close objects for this mini test
            newds.close();
            sid1.close();
        } // End of test DataSet constructor -by dereference

        // Read from disk
        dset3.read(drbuf, PredType::STD_U8LE);

        for (tu8 = static_cast<uint8_t *>(drbuf), i = 0; i < SPACE3_DIM1; i++, tu8++)
            verify_val(*tu8, static_cast<uint8_t>(i), "DataSpace::getSimpleExtentNpoints", __LINE__,
                       __FILE__);

        /*
         * Test getting the referenced region
         */

        // Get region
        DataSpace reg_sp = dset1.getRegion(&rbuf[0]);

        // Get and verify number of elements in a dataspace selection
        nelms = reg_sp.getSelectNpoints();
        verify_val(static_cast<long>(nelms), 30, "DataSpace::getSelectNpoints", __LINE__, __FILE__);

        // Get and verify number of hyperslab blocks
        nelms = reg_sp.getSelectHyperNblocks();
        verify_val(static_cast<long>(nelms), 15, "DataSpace::getSelectNpoints", __LINE__, __FILE__);

        /* Allocate space for the hyperslab blocks */
        coords = static_cast<hsize_t *>(HDmalloc(nelms * SPACE3_RANK * sizeof(hsize_t) * 2));

        // Get the list of hyperslab blocks currently selected
        reg_sp.getSelectHyperBlocklist(0, static_cast<hsize_t>(nelms), coords);

        // Verify values in the list
        verify_val(static_cast<long>(coords[0]), 2, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[1]), 3, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[2]), 7, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[3]), 8, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[4]), 12, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[5]), 13, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[6]), 17, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[7]), 18, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[8]), 22, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[9]), 23, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[10]), 27, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[11]), 28, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[12]), 32, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[13]), 33, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[14]), 37, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[15]), 38, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[16]), 42, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[17]), 43, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[18]), 47, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[19]), 48, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[20]), 52, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[21]), 53, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[22]), 57, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[23]), 58, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[24]), 62, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[25]), 63, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[26]), 67, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[27]), 68, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[28]), 72, "Hyperslab Coordinates", __LINE__, __FILE__);
        verify_val(static_cast<long>(coords[29]), 73, "Hyperslab Coordinates", __LINE__, __FILE__);

        HDfree(coords);

        // Check boundaries
        reg_sp.getSelectBounds(low, high);
        verify_val(static_cast<long>(low[0]), 2, "DataSpace::getSelectBounds", __LINE__, __FILE__);
        verify_val(static_cast<long>(high[0]), 73, "DataSpace::getSelectBounds", __LINE__, __FILE__);

        /* Close region space */
        reg_sp.close();

        /*
         * Another test on getting the referenced region
         */

        // Get region
        DataSpace elm_sp = dset1.getRegion(&rbuf[1]);

        // Get and verify number of element points in the current selection
        hssize_t nelmspts = elm_sp.getSelectElemNpoints();
        verify_val(static_cast<long>(nelmspts), 10, "DataSpace::getSelectNpoints", __LINE__, __FILE__);

        /* Allocate space for the hyperslab blocks */
        coords = static_cast<hsize_t *>(HDmalloc(nelmspts * SPACE3_RANK * sizeof(hsize_t)));

        // Get the list of element points currently selected
        elm_sp.getSelectElemPointlist(0, static_cast<hsize_t>(nelmspts), coords);

        // Verify points
        verify_val(coords[0], coord1[0][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[1], coord1[1][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[2], coord1[2][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[3], coord1[3][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[4], coord1[4][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[5], coord1[5][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[6], coord1[6][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[7], coord1[7][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[8], coord1[8][0], "Element Coordinates", __LINE__, __FILE__);
        verify_val(coords[9], coord1[9][0], "Element Coordinates", __LINE__, __FILE__);

        HDfree(coords);

        // Check boundaries
        elm_sp.getSelectBounds(low, high);
        verify_val(static_cast<long>(low[0]), 3, "DataSpace::getSelectBounds", __LINE__, __FILE__);
        verify_val(static_cast<long>(high[0]), 97, "DataSpace::getSelectBounds", __LINE__, __FILE__);

        // Close element space
        elm_sp.close();

        // Close resources
        sid1.close();
        dset3.close();
        dset1.close();
        file1.close();

        // Free memory buffers
        HDfree(wbuf);
        HDfree(rbuf);
        HDfree(dwbuf);
        HDfree(drbuf);

        PASSED();
    } // end try
    catch (Exception &E) {
        issue_fail_msg("test_reference_region_1D()", __LINE__, __FILE__, E.getCFuncName(), E.getCDetailMsg());
    }
} /* test_reference_region_1D() */

/*-------------------------------------------------------------------------
 *
 *  test_reference(): Main reference testing routine.
 *
 *-------------------------------------------------------------------------
 */
extern "C" void
test_reference()
{
    // Output message about test being performed
    MESSAGE(5, ("Testing References\n"));

    test_reference_params();    // Test basic parameters of reference functionality
    test_reference_obj();       // Test basic object reference functionality
    test_reference_group();     // Test group reference functionality
    test_reference_region_1D(); // Test 1-D reference functionality

} // test_reference()

/*-------------------------------------------------------------------------
 * Function:    cleanup_reference
 *
 * Purpose      Cleanup temporary test files
 *
 * Return       None
 *-------------------------------------------------------------------------
 */
extern "C" void
cleanup_reference()
{
    HDremove(FILE1.c_str());
    HDremove(FILE2.c_str());
}