summaryrefslogtreecommitdiffstats
path: root/test/tvlstr.c
blob: a7b2a325ee1f5bd83de7219e30140597f45961b3 (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
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/***********************************************************
*
* Test program:	 tvlstr
*
* Test the Variable-Length String functionality
*
*************************************************************/

#ifdef WIN32
#include <stdio.h>
#endif

#include "testhdf5.h"

#include "hdf5.h"

#define DATAFILE   "tvlstr.h5"
#define DATAFILE2  "tvlstr2.h5"

/* 1-D dataset with fixed dimensions */
#define SPACE1_NAME  "Space1"
#define SPACE1_RANK	1
#define SPACE1_DIM1	4

/* 2-D dataset with fixed dimensions */
#define SPACE2_NAME  "Space2"
#define SPACE2_RANK	2
#define SPACE2_DIM1	10
#define SPACE2_DIM2	10

#define VLSTR_TYPE      "vl_string_type"

/* Definitions for the VL re-writing test */
#define REWRITE_NDATASETS       32

/* String for testing attributes */
static const char *string_att = "This is the string for the attribute";
static char *string_att_write=NULL;

void *test_vlstr_alloc_custom(size_t size, void *info);
void test_vlstr_free_custom(void *mem, void *info);

/****************************************************************
**
**  test_vlstr_alloc_custom(): Test VL datatype custom memory
**      allocation routines.  This routine just uses malloc to
**      allocate the memory and increments the amount of memory
**      allocated.
**
****************************************************************/
void *test_vlstr_alloc_custom(size_t size, void *info)
{
    void *ret_value=NULL;       /* Pointer to return */
    int *mem_used=(int *)info;  /* Get the pointer to the memory used */
    size_t extra;               /* Extra space needed */

    /*
     *  This weird contortion is required on the DEC Alpha to keep the
     *  alignment correct - QAK
     */
    extra=MAX(sizeof(void *),sizeof(size_t));

    if((ret_value=HDmalloc(extra+size))!=NULL) {
        *(size_t *)ret_value=size;
        *mem_used+=size;
    } /* end if */
    ret_value=((unsigned char *)ret_value)+extra;
    return(ret_value);
}

/****************************************************************
**
**  test_vlstr_free_custom(): Test VL datatype custom memory
**      allocation routines.  This routine just uses free to
**      release the memory and decrements the amount of memory
**      allocated.
**
****************************************************************/
void test_vlstr_free_custom(void *_mem, void *info)
{
    unsigned char *mem;
    int *mem_used=(int *)info;  /* Get the pointer to the memory used */
    size_t extra;               /* Extra space needed */

    /*
     *  This weird contortion is required on the DEC Alpha to keep the
     *  alignment correct - QAK
     */
    extra=MAX(sizeof(void *),sizeof(size_t));

    if(_mem!=NULL) {
        mem=((unsigned char *)_mem)-extra;
        *mem_used-=*(size_t *)mem;
        HDfree(mem);
    } /* end if */
}

/****************************************************************
**
**  test_vlstrings_basic(): Test basic VL string code.
**      Tests simple VL string I/O
**
****************************************************************/
static void
test_vlstrings_basic(void)
{
    const char *wdata[SPACE1_DIM1]= {
        "Four score and seven years ago our forefathers brought forth on this continent a new nation,",
        "conceived in liberty and dedicated to the proposition that all men are created equal.",
        "Now we are engaged in a great civil war,",
        "testing whether that nation or any nation so conceived and so dedicated can long endure."
        };   /* Information to write */
    char *rdata[SPACE1_DIM1];   /* Information read in */
    char *wdata2;
    hid_t dataspace, dataset2;
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		dataset;	/* Dataset ID			*/
    hid_t		sid1;       /* Dataspace ID			*/
    hid_t		tid1;       /* Datatype ID			*/
    hid_t       xfer_pid;   /* Dataset transfer property list ID */
    hsize_t		dims1[] = {SPACE1_DIM1};
    hsize_t     size;       /* Number of bytes which will be used */
    unsigned       i;          /* counting variable */
    int         str_used;   /* String data in memory */
    int         mem_used=0; /* Memory used during allocation */
    herr_t		ret;		/* Generic return value		*/

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Basic VL String Functionality\n"));

    /* Create file */
    fid1 = H5Fcreate(DATAFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(fid1, FAIL, "H5Fcreate");

    /* Create dataspace for datasets */
    sid1 = H5Screate_simple(SPACE1_RANK, dims1, NULL);
    CHECK(sid1, FAIL, "H5Screate_simple");

    /* Create a datatype to refer to */
    tid1 = H5Tcopy (H5T_C_S1);
    CHECK(tid1, FAIL, "H5Tcopy");

    ret = H5Tset_size (tid1,H5T_VARIABLE);
    CHECK(ret, FAIL, "H5Tset_size");

    /* Create a dataset */
    dataset=H5Dcreate(fid1,"Dataset1",tid1,sid1,H5P_DEFAULT);
    CHECK(dataset, FAIL, "H5Dcreate");

    /* Write dataset to disk */
    ret=H5Dwrite(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,wdata);
    CHECK(ret, FAIL, "H5Dwrite");

    dataspace = H5Screate(H5S_SCALAR);

    dataset2=H5Dcreate(fid1,"Dataset2",tid1,dataspace,H5P_DEFAULT);
    CHECK(dataset, FAIL, "H5Dcreate");

    wdata2 = (char*)HDcalloc((size_t)65534, sizeof(char));
    HDmemset(wdata2, 'A', (size_t)65533);

    ret=H5Dwrite(dataset2,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,&wdata2);
    CHECK(ret, FAIL, "H5Dwrite");

    H5Sclose(dataspace);
    H5Dclose(dataset2);
    HDfree(wdata2);

    /* Change to the custom memory allocation routines for reading VL string */
    xfer_pid=H5Pcreate(H5P_DATASET_XFER);
    CHECK(xfer_pid, FAIL, "H5Pcreate");

    ret=H5Pset_vlen_mem_manager(xfer_pid,test_vlstr_alloc_custom,&mem_used,test_vlstr_free_custom,&mem_used);
    CHECK(ret, FAIL, "H5Pset_vlen_mem_manager");

    /* Make certain the correct amount of memory will be used */
    ret=H5Dvlen_get_buf_size(dataset,tid1,sid1,&size);
    CHECK(ret, FAIL, "H5Dvlen_get_buf_size");

    /* Count the actual number of bytes used by the strings */
    for(i=0,str_used=0; i<SPACE1_DIM1; i++)
        str_used+=HDstrlen(wdata[i])+1;

    /* Compare against the strings actually written */
    VERIFY(size,(hsize_t)str_used,"H5Dvlen_get_buf_size");

    /* Read dataset from disk */
    ret=H5Dread(dataset,tid1,H5S_ALL,H5S_ALL,xfer_pid,rdata);
    CHECK(ret, FAIL, "H5Dread");

    /* Make certain the correct amount of memory has been used */
    VERIFY(mem_used,str_used,"H5Dread");

    /* Compare data read in */
    for(i=0; i<SPACE1_DIM1; i++) {
        if(HDstrlen(wdata[i])!=strlen(rdata[i])) {
            TestErrPrintf("VL data length don't match!, strlen(wdata[%d])=%d, strlen(rdata[%d])=%d\n",(int)i,(int)strlen(wdata[i]),(int)i,(int)strlen(rdata[i]));
            continue;
        } /* end if */
        if( HDstrcmp(wdata[i],rdata[i]) != 0 ) {
            TestErrPrintf("VL data values don't match!, wdata[%d]=%s, rdata[%d]=%s\n",(int)i,wdata[i],(int)i,rdata[i]);
            continue;
        } /* end if */
    } /* end for */

    /* Reclaim the read VL data */
    ret=H5Dvlen_reclaim(tid1,sid1,xfer_pid,rdata);
    CHECK(ret, FAIL, "H5Dvlen_reclaim");

    /* Make certain the VL memory has been freed */
    VERIFY(mem_used,0,"H5Dvlen_reclaim");

    /* Close Dataset */
    ret = H5Dclose(dataset);
    CHECK(ret, FAIL, "H5Dclose");

    /* Close datatype */
    ret = H5Tclose(tid1);
    CHECK(ret, FAIL, "H5Tclose");

    /* Close disk dataspace */
    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    /* Close dataset transfer property list */
    ret = H5Pclose(xfer_pid);
    CHECK(ret, FAIL, "H5Pclose");

    /* Close file */
    ret = H5Fclose(fid1);
    CHECK(ret, FAIL, "H5Fclose");

} /* end test_vlstrings_basic() */

/****************************************************************
**
**  test_vlstrings_special(): Test VL string code for special
**      string cases, nil and zero-sized.
**
****************************************************************/
static void
test_vlstrings_special(void)
{
    const char *wdata[SPACE1_DIM1] = {"one", "two", "", "\0"};
    const char *wdata2[SPACE1_DIM1] = {NULL, NULL, NULL, NULL};
    char *rdata[SPACE1_DIM1];   /* Information read in */
    char *fill;                 /* Fill value */
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		dataset;	/* Dataset ID			*/
    hid_t		sid1;       /* Dataspace ID			*/
    hid_t		tid1;       /* Datatype ID			*/
    hid_t		dcpl;       /* Dataset creation property list ID */
    hsize_t		dims1[] = {SPACE1_DIM1};
    unsigned       i;          /* counting variable */
    herr_t		ret;		/* Generic return value		*/

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Special VL Strings\n"));

    /* Create file */
    fid1 = H5Fcreate(DATAFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(fid1, FAIL, "H5Fcreate");

    /* Create dataspace for datasets */
    sid1 = H5Screate_simple(SPACE1_RANK, dims1, NULL);
    CHECK(sid1, FAIL, "H5Screate_simple");

    /* Create a datatype to refer to */
    tid1 = H5Tcopy (H5T_C_S1);
    CHECK(tid1, FAIL, "H5Tcopy");

    ret = H5Tset_size (tid1,H5T_VARIABLE);
    CHECK(ret, FAIL, "H5Tset_size");

    /* Create a dataset */
    dataset=H5Dcreate(fid1,"Dataset3",tid1,sid1,H5P_DEFAULT);
    CHECK(dataset, FAIL, "H5Dcreate");

    /* Read from dataset before writing data */
    ret=H5Dread(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,rdata);
    CHECK(ret, FAIL, "H5Dread");

    /* Check data read in */
    for(i=0; i<SPACE1_DIM1; i++)
        if(rdata[i]!=NULL)
            TestErrPrintf("VL doesn't match!, rdata[%d]=%p\n",(int)i,rdata[i]);

    /* Write dataset to disk */
    ret=H5Dwrite(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,wdata);
    CHECK(ret, FAIL, "H5Dwrite");

    /* Read dataset from disk */
    ret=H5Dread(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,rdata);
    CHECK(ret, FAIL, "H5Dread");

    /* Compare data read in */
    for(i=0; i<SPACE1_DIM1; i++) {
        if(HDstrlen(wdata[i])!=strlen(rdata[i])) {
            TestErrPrintf("VL data length don't match!, strlen(wdata[%d])=%d, strlen(rdata[%d])=%d\n",(int)i,(int)strlen(wdata[i]),(int)i,(int)strlen(rdata[i]));
            continue;
        } /* end if */
        if((wdata[i]==NULL && rdata[i]!=NULL) || (rdata[i]==NULL && wdata[i]!=NULL)) {
            TestErrPrintf("VL data values don't match!\n");
            continue;
        } /* end if */
        if( HDstrcmp(wdata[i],rdata[i]) != 0 ) {
            TestErrPrintf("VL data values don't match!, wdata[%d]=%s, rdata[%d]=%s\n",(int)i,wdata[i],(int)i,rdata[i]);
            continue;
        } /* end if */
    } /* end for */

    /* Reclaim the read VL data */
    ret=H5Dvlen_reclaim(tid1,sid1,H5P_DEFAULT,rdata);
    CHECK(ret, FAIL, "H5Dvlen_reclaim");

    /* Close Dataset */
    ret = H5Dclose(dataset);
    CHECK(ret, FAIL, "H5Dclose");

    /* Create another dataset to test nil strings */
    dcpl=H5Pcreate(H5P_DATASET_CREATE);
    CHECK(dcpl, FAIL, "H5Pcreate");

    /* Set the fill value for the second dataset */
    fill=NULL;
    ret=H5Pset_fill_value(dcpl, tid1, &fill);
    CHECK(ret, FAIL, "H5Pset_fill_value");

    dataset=H5Dcreate(fid1,"Dataset4",tid1,sid1,dcpl);
    CHECK(dataset, FAIL, "H5Dcreate");

    /* Close dataset creation property list */
    ret = H5Pclose(dcpl);
    CHECK(ret, FAIL, "H5Pclose");

    /* Read from dataset before writing data */
    ret=H5Dread(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,rdata);
    CHECK(ret, FAIL, "H5Dread");

    /* Check data read in */
    for(i=0; i<SPACE1_DIM1; i++)
        if(rdata[i]!=NULL)
            TestErrPrintf("VL doesn't match!, rdata[%d]=%p\n",(int)i,rdata[i]);

    /* Try to write nil strings to disk. */
    ret=H5Dwrite(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,wdata2);
    CHECK(ret, FAIL, "H5Dwrite");

    /* Read nil strings back from disk */
    ret=H5Dread(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,rdata);
    CHECK(ret, FAIL, "H5Dread");

    /* Check data read in */
    for(i=0; i<SPACE1_DIM1; i++)
        if(rdata[i]!=NULL)
            TestErrPrintf("VL doesn't match!, rdata[%d]=%p\n",(int)i,rdata[i]);

    /* Close Dataset */
    ret = H5Dclose(dataset);
    CHECK(ret, FAIL, "H5Dclose");

    /* Close datatype */
    ret = H5Tclose(tid1);
    CHECK(ret, FAIL, "H5Tclose");

    /* Close disk dataspace */
    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    /* Close file */
    ret = H5Fclose(fid1);
    CHECK(ret, FAIL, "H5Fclose");
}

/****************************************************************
**
**  test_vlstring_type(): Test VL string type.
**      Tests if VL string is treated as string.
**
****************************************************************/
static void test_vlstring_type(void)
{
    hid_t               fid;           /* HDF5 File IDs                */
    hid_t               tid_vlstr;
    H5T_cset_t          cset;
    H5T_str_t           pad;
    herr_t              ret;

    /* Output message about test being performed */
    MESSAGE(5, ("Testing VL String type\n"));

    /* Open file */
    fid = H5Fopen(DATAFILE, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK(fid, FAIL, "H5Fopen");

    /* Create a datatype to refer to */
    tid_vlstr = H5Tcopy(H5T_C_S1);
    CHECK(tid_vlstr, FAIL, "H5Tcopy");

    /* Change padding and verify it */
    ret = H5Tset_strpad(tid_vlstr, H5T_STR_NULLPAD);
    CHECK(ret, FAIL, "H5Tset_strpad");
    pad = H5Tget_strpad(tid_vlstr);
    VERIFY(pad, H5T_STR_NULLPAD, "H5Tget_strpad");

    /* Convert to variable-length string */
    ret = H5Tset_size(tid_vlstr, H5T_VARIABLE);
    CHECK(ret, FAIL, "H5Tset_size");

    /* Check if datatype is VL string */
    ret = H5Tget_class(tid_vlstr);
    VERIFY(ret, H5T_STRING, "H5Tget_class");
    ret = H5Tis_variable_str(tid_vlstr);
    VERIFY(ret, TRUE, "H5Tis_variable_str");

    /* Check default character set and padding */
    cset = H5Tget_cset(tid_vlstr);
    VERIFY(cset, H5T_CSET_ASCII, "H5Tget_cset");
    pad = H5Tget_strpad(tid_vlstr);
    VERIFY(pad, H5T_STR_NULLPAD, "H5Tget_strpad");

    /* Commit variable-length string datatype to storage */
    ret = H5Tcommit(fid, VLSTR_TYPE, tid_vlstr);
    CHECK(ret, FAIL, "H5Tcommit");

    /* Close datatype */
    ret = H5Tclose(tid_vlstr);
    CHECK(ret, FAIL, "H5Tclose");

    tid_vlstr = H5Topen(fid, VLSTR_TYPE);
    CHECK(tid_vlstr, FAIL, "H5Topen");

    ret = H5Tclose(tid_vlstr);
    CHECK(ret, FAIL, "H5Tclose");

    ret = H5Fclose(fid);
    CHECK(ret, FAIL, "H5Fclose");


    fid = H5Fopen(DATAFILE, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK(fid, FAIL, "H5Fopen");

    /* Open the variable-length string datatype just created */
    tid_vlstr = H5Topen(fid, VLSTR_TYPE);
    CHECK(tid_vlstr, FAIL, "H5Topen");

    /* Verify character set and padding */
    cset = H5Tget_cset(tid_vlstr);
    VERIFY(cset, H5T_CSET_ASCII, "H5Tget_cset");
    pad = H5Tget_strpad(tid_vlstr);
    VERIFY(pad, H5T_STR_NULLPAD, "H5Tget_strpad");

    /* Close datatype and file */
    ret = H5Tclose(tid_vlstr);
    CHECK(ret, FAIL, "H5Tclose");
    ret = H5Fclose(fid);
    CHECK(ret, FAIL, "H5Fclose");

} /* end test_vlstring_type() */

/****************************************************************
**
**  test_compact_vlstring(): Test code for storing VL strings in
**      compact datasets.
**
****************************************************************/
static void
test_compact_vlstring(void)
{
    const char *wdata[SPACE1_DIM1] = {"one", "two", "three", "four"};
    char *rdata[SPACE1_DIM1];   /* Information read in */
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		dataset;	/* Dataset ID			*/
    hid_t		sid1;       /* Dataspace ID			*/
    hid_t		tid1;       /* Datatype ID			*/
    hid_t		plist;      /* Dataset creation property list	*/
    hsize_t		dims1[] = {SPACE1_DIM1};
    unsigned       i;          /* counting variable */
    herr_t		ret;		/* Generic return value		*/

    /* Output message about test being performed */
    MESSAGE(5, ("Testing VL Strings in compact dataset\n"));

    /* Create file */
    fid1 = H5Fcreate(DATAFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(fid1, FAIL, "H5Fcreate");

    /* Create dataspace for datasets */
    sid1 = H5Screate_simple(SPACE1_RANK, dims1, NULL);
    CHECK(sid1, FAIL, "H5Screate_simple");

    /* Create a datatype to refer to */
    tid1 = H5Tcopy (H5T_C_S1);
    CHECK(tid1, FAIL, "H5Tcopy");

    ret = H5Tset_size (tid1,H5T_VARIABLE);
    CHECK(ret, FAIL, "H5Tset_size");

    plist = H5Pcreate(H5P_DATASET_CREATE);
    CHECK(plist, FAIL, "H5Pcreate");

    ret = H5Pset_layout(plist, H5D_COMPACT);
    CHECK(ret, FAIL, "H5Pset_layout");

    /* Create a dataset */
    dataset=H5Dcreate(fid1,"Dataset5",tid1,sid1,plist);
    CHECK(dataset, FAIL, "H5Dcreate");

    /* Write dataset to disk */
    ret=H5Dwrite(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,wdata);
    CHECK(ret, FAIL, "H5Dwrite");

    /* Read dataset from disk */
    ret=H5Dread(dataset,tid1,H5S_ALL,H5S_ALL,H5P_DEFAULT,rdata);
    CHECK(ret, FAIL, "H5Dread");

    /* Compare data read in */
    for(i=0; i<SPACE1_DIM1; i++) {
        if(HDstrlen(wdata[i])!=strlen(rdata[i])) {
            TestErrPrintf("VL data length don't match!, strlen(wdata[%d])=%d, strlen(rdata[%d])=%d\n",(int)i,(int)strlen(wdata[i]),(int)i,(int)strlen(rdata[i]));
            continue;
        } /* end if */
        if( HDstrcmp(wdata[i],rdata[i]) != 0 ) {
            TestErrPrintf("VL data values don't match!, wdata[%d]=%s, rdata[%d]=%s\n",(int)i,wdata[i],(int)i,rdata[i]);
            continue;
        } /* end if */
    } /* end for */

    /* Reclaim the read VL data */
    ret=H5Dvlen_reclaim(tid1,sid1,H5P_DEFAULT,rdata);
    CHECK(ret, FAIL, "H5Dvlen_reclaim");

    /* Close Dataset */
    ret = H5Dclose(dataset);
    CHECK(ret, FAIL, "H5Dclose");

    /* Close datatype */
    ret = H5Tclose(tid1);
    CHECK(ret, FAIL, "H5Tclose");

    /* Close disk dataspace */
    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    /* Close dataset create property list */
    ret = H5Pclose(plist);
    CHECK(ret, FAIL, "H5Pclose");

    /* Close file */
    ret = H5Fclose(fid1);
    CHECK(ret, FAIL, "H5Fclose");
} /*test_compact_vlstrings*/

/****************************************************************
**
**  test_write_vl_string_attribute(): Test basic VL string code.
**      Tests writing VL strings as attributes
**
****************************************************************/
static void test_write_vl_string_attribute(void)
{
    hid_t file, root, dataspace, att;
    hid_t type;
    herr_t ret;
    char *string_att_check;

    /* Open the file */
    file = H5Fopen(DATAFILE, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK(file, FAIL, "H5Fopen");

    /* Create a datatype to refer to. */
    type = H5Tcopy (H5T_C_S1);
    CHECK(type, FAIL, "H5Tcopy");

    ret = H5Tset_size (type, H5T_VARIABLE);
    CHECK(ret, FAIL, "H5Tset_size");

    root = H5Gopen(file, "/");
    CHECK(root, FAIL, "H5Gopen");

    dataspace = H5Screate(H5S_SCALAR);
    CHECK(dataspace, FAIL, "H5Screate");

    /* Test creating a "normal" sized string attribute */
    att = H5Acreate(root, "test_scalar", type, dataspace, H5P_DEFAULT);
    CHECK(att, FAIL, "H5Acreate");

    ret = H5Awrite(att, type, &string_att);
    CHECK(ret, FAIL, "H5Awrite");

    ret = H5Aread(att, type, &string_att_check);
    CHECK(ret, FAIL, "H5Aread");

    if(HDstrcmp(string_att_check,string_att)!=0)
        TestErrPrintf("VL string attributes don't match!, string_att=%s, string_att_check=%s\n",string_att,string_att_check);

    HDfree(string_att_check);

    ret = H5Aclose(att);
    CHECK(ret, FAIL, "HAclose");

    /* Test creating a "large" sized string attribute */
    att = H5Acreate(root, "test_scalar_large", type, dataspace, H5P_DEFAULT);
    CHECK(att, FAIL, "H5Acreate");

    string_att_write = (char*)HDcalloc((size_t)8192, sizeof(char));
    HDmemset(string_att_write, 'A', (size_t)8191);

    ret = H5Awrite(att, type, &string_att_write);
    CHECK(ret, FAIL, "H5Awrite");

    ret = H5Aread(att, type, &string_att_check);
    CHECK(ret, FAIL, "H5Aread");

    if(HDstrcmp(string_att_check,string_att_write)!=0)
        TestErrPrintf("VL string attributes don't match!, string_att_write=%s, string_att_check=%s\n",string_att_write,string_att_check);

    HDfree(string_att_check);
    /* The attribute string written is freed below, in the test_read_vl_string_attribute() test */
    /* HDfree(string_att_write); */

    ret = H5Aclose(att);
    CHECK(ret, FAIL, "HAclose");

    ret = H5Gclose(root);
    CHECK(ret, FAIL, "H5Gclose");

    ret = H5Tclose(type);
    CHECK(ret, FAIL, "H5Tclose");

    ret = H5Sclose(dataspace);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Fclose(file);
    CHECK(ret, FAIL, "H5Fclose");

    return;
}

/****************************************************************
**
**  test_read_vl_string_attribute(): Test basic VL string code.
**      Tests reading VL strings from attributes
**
****************************************************************/
static void test_read_vl_string_attribute(void)
{
    hid_t file, root, att;
    hid_t type;
    herr_t ret;
    char *string_att_check;

    /* Open file */
    file = H5Fopen(DATAFILE, H5F_ACC_RDONLY, H5P_DEFAULT);
    CHECK(file, FAIL, "H5Fopen");

    /* Create a datatype to refer to. */
    type = H5Tcopy (H5T_C_S1);
    CHECK(type, FAIL, "H5Tcopy");

    ret = H5Tset_size (type, H5T_VARIABLE);
    CHECK(ret, FAIL, "H5Tset_size");

    root = H5Gopen(file, "/");
    CHECK(root, FAIL, "H5Gopen");

    /* Test reading "normal" sized string attribute */
    att = H5Aopen_name(root, "test_scalar");
    CHECK(att, FAIL, "H5Aopen_name");

    ret = H5Aread(att, type, &string_att_check);
    CHECK(ret, FAIL, "H5Aread");

    if(HDstrcmp(string_att_check,string_att)!=0)
        TestErrPrintf("VL string attributes don't match!, string_att=%s, string_att_check=%s\n",string_att,string_att_check);

    HDfree(string_att_check);

    ret = H5Aclose(att);
    CHECK(ret, FAIL, "HAclose");

    /* Test reading "large" sized string attribute */
    att = H5Aopen_name(root, "test_scalar_large");
    CHECK(att, FAIL, "H5Aopen_name");

    ret = H5Aread(att, type, &string_att_check);
    CHECK(ret, FAIL, "H5Aread");

    if(HDstrcmp(string_att_check,string_att_write)!=0)
        TestErrPrintf("VL string attributes don't match!, string_att_write=%s, string_att_check=%s\n",string_att_write,string_att_check);

    HDfree(string_att_check);
    HDfree(string_att_write);   /* Free string allocated in test_write_vl_string_attribute */

    ret = H5Aclose(att);
    CHECK(ret, FAIL, "HAclose");

    ret = H5Tclose(type);
    CHECK(ret, FAIL, "H5Tclose");

    ret = H5Gclose(root);
    CHECK(ret, FAIL, "H5Gclose");

    ret = H5Fclose(file);
    CHECK(ret, FAIL, "H5Fclose");

    return;
}

/* Helper routine for test_vl_rewrite() */
static void write_scalar_dset(hid_t file, hid_t type, hid_t space, char *name, char *data)
{
      hid_t dset;
      herr_t ret;

      dset = H5Dcreate (file, name, type, space, H5P_DEFAULT);
      CHECK(dset, FAIL, "H5Dcreate");

      ret = H5Dwrite(dset, type, space, space, H5P_DEFAULT, &data);
      CHECK(ret, FAIL, "H5Dwrite");

      ret = H5Dclose(dset);
      CHECK(ret, FAIL, "H5Dclose");
}

/* Helper routine for test_vl_rewrite() */
static void read_scalar_dset(hid_t file, hid_t type, hid_t space, char *name, char *data)
{
    hid_t dset;
    herr_t ret;
    char *data_read;

    dset = H5Dopen (file, name);
    CHECK(dset, FAIL, "H5Dopen");

    ret = H5Dread(dset, type, space, space, H5P_DEFAULT, &data_read);
    CHECK(ret, FAIL, "H5Dread");

    ret = H5Dclose(dset);
    CHECK(ret, FAIL, "H5Dclose");

    if(HDstrcmp(data, data_read))
        TestErrPrintf("Expected %s for dataset %s but read %s\n", data, name, data_read);

    HDfree(data_read);
}

/****************************************************************
**
**  test_vl_rewrite(): Test basic VL string code.
**      Tests I/O on VL strings when lots of objects in the file
**      have been linked/unlinked.
**
****************************************************************/
static void test_vl_rewrite(void)
{
    hid_t file1, file2; /* File IDs */
    hid_t type;         /* VL string datatype ID */
    hid_t space;        /* Scalar dataspace */
    char name[256];     /* Buffer for names & data */
    int i;              /* Local index variable */
    herr_t ret;         /* Generic return value */

    /* Create the VL string datatype */
    type = H5Tcopy(H5T_C_S1);
    CHECK(type, FAIL, "H5Tcopy");

    ret = H5Tset_size(type, H5T_VARIABLE);
    CHECK(ret, FAIL, "H5Tset_size");

    /* Create the scalar dataspace */
    space = H5Screate(H5S_SCALAR);
    CHECK(space, FAIL, "H5Screate");

    /* Open the files */
    file1 = H5Fcreate(DATAFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(file1, FAIL, "H5Fcreate");

    file2 = H5Fcreate(DATAFILE2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(file1, FAIL, "H5Fcreate");

    /* Create in file 1 */
    for(i=0; i<REWRITE_NDATASETS; i++) {
        sprintf(name, "/set_%d", i);
        write_scalar_dset(file1, type, space, name, name);
    }

    /* Effectively copy data from file 1 to 2 */
    for(i=0; i<REWRITE_NDATASETS; i++) {
        sprintf(name, "/set_%d", i);
        read_scalar_dset(file1, type, space, name, name);
        write_scalar_dset(file2, type, space, name, name);
    }

    /* Read back from file 2 */
    for(i=0; i<REWRITE_NDATASETS; i++) {
        sprintf(name, "/set_%d", i);
        read_scalar_dset(file2, type, space, name, name);
    }

    /* Remove from file 2. */
    for(i=0; i<REWRITE_NDATASETS; i++) {
        sprintf(name, "/set_%d", i);
        ret = H5Gunlink(file2, name);
        CHECK(ret, FAIL, "H5Gunlink");
    }

    /* Effectively copy from file 1 to file 2 */
    for(i=0; i<REWRITE_NDATASETS; i++) {
        sprintf(name, "/set_%d", i);
        read_scalar_dset(file1, type, space, name, name);
        write_scalar_dset(file2, type, space, name, name);
    }

    /* Close everything */
    ret = H5Tclose(type);
    CHECK(ret, FAIL, "H5Tclose");

    ret = H5Sclose(space);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Fclose(file1);
    CHECK(ret, FAIL, "H5Fclose");

    ret = H5Fclose(file2);
    CHECK(ret, FAIL, "H5Fclose");

    return;
} /* end test_vl_rewrite() */

/****************************************************************
**
**  test_vlstrings(): Main VL string testing routine.
**
****************************************************************/
void
test_vlstrings(void)
{
    /* Output message about test being performed */
    MESSAGE(5, ("Testing Variable-Length Strings\n"));

    /* These tests use the same file */
    /* Test basic VL string datatype */
    test_vlstrings_basic();
    test_vlstrings_special();
    test_vlstring_type();
    test_compact_vlstring();

    /* Test using VL strings in attributes */
    test_write_vl_string_attribute();
    test_read_vl_string_attribute();

    /* Test writing VL datasets in files with lots of unlinking */
    test_vl_rewrite();
}   /* test_vlstrings() */


/*-------------------------------------------------------------------------
 * Function:	cleanup_vlstrings
 *
 * Purpose:	Cleanup temporary test files
 *
 * Return:	none
 *
 * Programmer:	Quincey Koziol
 *              September 10, 1999
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
void
cleanup_vlstrings(void)
{
    HDremove(DATAFILE);
    HDremove(DATAFILE2);
}