summaryrefslogtreecommitdiffstats
path: root/test/cmpd_dset.c
blob: 4961eab4048a21ff14fda4387c25c9d4e8084eec (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
/*
 * Copyright (C) 1998 NCSA
 *                    All rights reserved.
 *
 * Programmer:  Robb Matzke <matzke@llnl.gov>
 *              Friday, January 23, 1998
 */
#undef NDEBUG
#include <assert.h>
#include <hdf5.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define TEST_FILE_NAME	"cmpd_dset.h5"

/* The first dataset */
typedef struct s1_t {
    unsigned int a;
    unsigned int b;
    unsigned int c[4];
    unsigned int d;
    unsigned int e;
} s1_t;

/* The second dataset (same as first) */
typedef s1_t s2_t;

/* The third dataset (reversed fields of s1) */
typedef struct s3_t {
    unsigned int e;
    unsigned int d;
    unsigned int c[4];
    unsigned int b;
    unsigned int a;
} s3_t;

/* The fourth dataset (a subset of s1) */
typedef struct s4_t {
    unsigned int b;
    unsigned int d;
} s4_t;

/* The fifth dataset (a superset of s1) */
typedef struct s5_t {
    unsigned int pre;
    unsigned int a;
    unsigned int b;
    unsigned int mid1;
    unsigned int c[4];
    unsigned int mid2;
    unsigned int d;
    unsigned int e;
    unsigned int post;
} s5_t;


#if 1
#  define NX	100u
#  define NY	2000u
#else
#  define NX	12u
#  define NY    9u
#endif


/*-------------------------------------------------------------------------
 * Function:	cleanup
 *
 * Purpose:	Cleanup temporary test files
 *
 * Return:	none
 *
 * Programmer:	Albert Cheng
 *              May 28, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void
cleanup(void)
{
    if (!getenv ("HDF5_NOCLEANUP")) {
	remove(TEST_FILE_NAME);
    }
}


/*-------------------------------------------------------------------------
 * Function:	main
 *
 * Purpose:	Creates a simple dataset of a compound type and then reads
 *		it back.  The dataset is read back in various ways to
 *		exercise the I/O pipeline and compound type conversion.
 *
 * Return:	Success:	0
 *
 *		Failure:	1
 *
 * Programmer:	Robb Matzke
 *              Friday, January 23, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
int
main (void)
{
    /* First dataset */
    static s1_t		s1[NX*NY];
    hid_t		s1_tid;

    /* Second dataset */
    static s2_t		s2[NX*NY];
    hid_t		s2_tid;

    /* Third dataset */
    static s3_t		s3[NX*NY];
    hid_t		s3_tid;
    
    /* Fourth dataset */
    static s4_t		s4[NX*NY];
    hid_t		s4_tid;
    
    /* Fifth dataset */
    static s5_t		s5[NX*NY];
    hid_t		s5_tid;

    /* Sixth dataset */

    /* Seventh dataset */
    hid_t		s7_sid;

    /* Eighth dataset */
    s1_t		*s8 = NULL;
    hid_t		s8_f_sid;	/*file data space		*/
    hid_t		s8_m_sid;	/*memory data space		*/

    /* Ninth dataset */

    /* Tenth dataset */

    /* Eleventh dataset */
    s4_t		*s11 = NULL;

    /* Other variables */
    unsigned int	i, j;
    int			ndims;
    hid_t		file, dataset, space, PRESERVE;
    herr_t		status;
    static hsize_t	dim[] = {NX, NY};
    hssize_t 		f_offset[2];	/*offset of hyperslab in file	*/
    hsize_t 		h_size[2];	/*size of hyperslab		*/
    hsize_t 		h_sample[2];	/*hyperslab sampling		*/
    size_t		memb_size[1] = {4};

    /* Create the file */
    file = H5Fcreate (TEST_FILE_NAME, H5F_ACC_TRUNC|H5F_ACC_DEBUG,
		      H5P_DEFAULT, H5P_DEFAULT);
    assert (file>=0);

    /* Create the data space */
    space = H5Screate_simple (2, dim, NULL);
    assert (space>=0);

    /* Create xfer properties to preserve initialized data */
    PRESERVE = H5Pcreate (H5P_DATASET_XFER);
    assert (PRESERVE>=0);
    status = H5Pset_preserve (PRESERVE, 1);
    assert (status>=0);

    /*
     *######################################################################
     * STEP 1: Save the original dataset natively.
     */
    printf ("\
STEP  1: Initialize dataset `s1' and store it on disk in native order.\n");
    fflush (stdout);
    
    /* Initialize the dataset */
    for (i=0; i<NX*NY; i++) {
	s1[i].a = 8*i+0;
	s1[i].b = 2000+2*i;
	s1[i].c[0] = 8*i+2;
	s1[i].c[1] = 8*i+3;
	s1[i].c[2] = 8*i+4;
	s1[i].c[3] = 8*i+5;
	s1[i].d = 2001+2*i;
	s1[i].e = 8*i+7;
    }

    /* Create the memory data type */
    s1_tid = H5Tcreate (H5T_COMPOUND, sizeof(s1_t));
    H5Tinsert (s1_tid, "a", HOFFSET(s1_t,a), H5T_NATIVE_INT);
    H5Tinsert (s1_tid, "b", HOFFSET(s1_t,b), H5T_NATIVE_INT);
    H5Tinsert_array (s1_tid, "c", HOFFSET(s1_t,c), 1, memb_size, NULL,
		     H5T_NATIVE_INT);
    H5Tinsert (s1_tid, "d", HOFFSET(s1_t,d), H5T_NATIVE_INT);
    H5Tinsert (s1_tid, "e", HOFFSET(s1_t,e), H5T_NATIVE_INT);
    assert (s1_tid>=0);

    /* Create the dataset */
    dataset = H5Dcreate (file, "s1", s1_tid, space, H5P_DEFAULT);
    assert (dataset>=0);

    /* Write the data */
    status = H5Dwrite (dataset, s1_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, s1);
    assert (status>=0);

    /*
     *######################################################################
     * STEP 2: We create a new type ID for the second dataset even though
     * 	       it's the same as the first just to test things better, but
     *	       in fact, we could have used s1_tid.
     */
    printf ("\
STEP  2: Read the dataset from disk into a new memory buffer which has the\n\
         same data type and space. This will be the typical case.\n");
    fflush (stdout);
    

    /* Create a data type for s2 */
    s2_tid = H5Tcreate (H5T_COMPOUND, sizeof(s2_t));
    H5Tinsert (s2_tid, "a", HOFFSET(s2_t,a), H5T_NATIVE_INT);
    H5Tinsert (s2_tid, "b", HOFFSET(s2_t,b), H5T_NATIVE_INT);
    H5Tinsert_array (s2_tid, "c", HOFFSET(s2_t,c), 1, memb_size, NULL,
		     H5T_NATIVE_INT);
    H5Tinsert (s2_tid, "d", HOFFSET(s2_t,d), H5T_NATIVE_INT);
    H5Tinsert (s2_tid, "e", HOFFSET(s2_t,e), H5T_NATIVE_INT);
    assert (s2_tid>=0);
    
    /* Read the data */
    status = H5Dread (dataset, s2_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, s2);
    assert (status>=0);

    /* Compare s2 with s1.  They should be the same */
    for (i=0; i<NX*NY; i++) {
	assert (s1[i].a==s2[i].a);
	assert (s1[i].b==s2[i].b);
	assert (s1[i].c[0]==s2[i].c[0]);
	assert (s1[i].c[1]==s2[i].c[1]);
	assert (s1[i].c[2]==s2[i].c[2]);
	assert (s1[i].c[3]==s2[i].c[3]);
	assert (s1[i].d==s2[i].d);
	assert (s1[i].e==s2[i].e);
    }
    
    /*
     *######################################################################
     * STEP 3: Read the dataset back into a third memory buffer. This buffer
     * 	       has the same data space but the data type is different: the
     *	       data type is a struct whose members are in the opposite order.
     */
    printf ("\
STEP  3: Read the dataset again with members in a different order.\n");
    fflush (stdout);
    
    /* Create a data type for s3 */
    s3_tid = H5Tcreate (H5T_COMPOUND, sizeof(s3_t));
    H5Tinsert (s3_tid, "a", HOFFSET(s3_t,a), H5T_NATIVE_INT);
    H5Tinsert (s3_tid, "b", HOFFSET(s3_t,b), H5T_NATIVE_INT);
    H5Tinsert_array (s3_tid, "c", HOFFSET(s3_t,c), 1, memb_size, NULL,
		     H5T_NATIVE_INT);
    H5Tinsert (s3_tid, "d", HOFFSET(s3_t,d), H5T_NATIVE_INT);
    H5Tinsert (s3_tid, "e", HOFFSET(s3_t,e), H5T_NATIVE_INT);
    assert (s3_tid>=0);
    
    /* Read the data */
    status = H5Dread (dataset, s3_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, s3);
    assert (status>=0);

    /* Compare s3 with s1.  They should be the same */
    for (i=0; i<NX*NY; i++) {
	assert (s1[i].a==s3[i].a);
	assert (s1[i].b==s3[i].b);
	assert (s1[i].c[0]==s3[i].c[0]);
	assert (s1[i].c[1]==s3[i].c[1]);
	assert (s1[i].c[2]==s3[i].c[2]);
	assert (s1[i].c[3]==s3[i].c[3]);
	assert (s1[i].d==s3[i].d);
	assert (s1[i].e==s3[i].e);
    }

    /*
     *######################################################################
     * STEP 4: Read a subset of the members.  Of the <a,b,c,d,e> members
     *         stored on disk we'll read <b,d>.
     */
    printf ("\
STEP  4: Read a subset of the members.\n");
    fflush (stdout);

    /* Create a datatype for s4 */
    s4_tid = H5Tcreate (H5T_COMPOUND, sizeof(s4_t));
    H5Tinsert (s4_tid, "b", HOFFSET(s4_t,b), H5T_NATIVE_INT);
    H5Tinsert (s4_tid, "d", HOFFSET(s4_t,d), H5T_NATIVE_INT);
    assert (s4_tid>=0);

    /* Read the data */
    status = H5Dread (dataset, s4_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, s4);
    assert (status>=0);

    /* Compare s4 with s1 */
    for (i=0; i<NX*NY; i++) {
	assert (s1[i].b==s4[i].b);
	assert (s1[i].d==s4[i].d);
    }

    /*
     *######################################################################
     * STEP 5: Read all the members into a struct which has other members
     * 	       which have already been initialized.
     */
    printf ("\
STEP  5: Read members into a superset which is partially initialized.\n");
    fflush (stdout);

    /* Initialize some members */
    for (i=0; i<NX*NY; i++) {
	s5[i].pre =  1000+4*i;
	s5[i].mid1 = 1001+4*i;
	s5[i].mid2 = 1002+4*i;
	s5[i].post = 1003+4*i;
    }
    
    /* Create a data type for s5 */
    s5_tid = H5Tcreate (H5T_COMPOUND, sizeof(s5_t));
    H5Tinsert (s5_tid, "a", HOFFSET(s5_t,a), H5T_NATIVE_INT);
    H5Tinsert (s5_tid, "b", HOFFSET(s5_t,b), H5T_NATIVE_INT);
    H5Tinsert_array (s5_tid, "c", HOFFSET(s5_t,c), 1, memb_size, NULL,
		     H5T_NATIVE_INT);
    H5Tinsert (s5_tid, "d", HOFFSET(s5_t,d), H5T_NATIVE_INT);
    H5Tinsert (s5_tid, "e", HOFFSET(s5_t,e), H5T_NATIVE_INT);
    assert (s5_tid>=0);
	
    /* Read the data */
    status = H5Dread (dataset, s5_tid, H5S_ALL, H5S_ALL, PRESERVE, s5);
    assert (status>=0);

    /* Check that the data was read properly */
    for (i=0; i<NX*NY; i++) {
	assert (s1[i].a==s5[i].a);
	assert (s1[i].b==s5[i].b);
	assert (s1[i].c[0]==s5[i].c[0]);
	assert (s1[i].c[1]==s5[i].c[1]);
	assert (s1[i].c[2]==s5[i].c[2]);
	assert (s1[i].c[3]==s5[i].c[3]);
	assert (s1[i].d==s5[i].d);
	assert (s1[i].e==s5[i].e);
    }

    /* Check that no previous values were clobbered */
    for (i=0; i<NX*NY; i++) {
	assert (s5[i].pre  == 1000+4*i);
	assert (s5[i].mid1 == 1001+4*i);
	assert (s5[i].mid2 == 1002+4*i);
	assert (s5[i].post == 1003+4*i);
    }

    /*
     *######################################################################
     * STEP 6: Update fields `b' and `d' on the file leaving the other
     *         fields unchanged.  This tests member alignment and background
     *	       buffers.
     */
    printf ("\
STEP  6: Update fields `b' and `d' on the file, leaving the other fields\n\
         unchanged.\n");
    fflush (stdout);

    /* Initialize `s4' with new values */
    for (i=0; i<NX*NY; i++) {
	s4[i].b = 8*i+1;
	s4[i].d = 8*i+6;
    }

    /* Write the data to file */
    status = H5Dwrite (dataset, s4_tid, H5S_ALL, H5S_ALL, PRESERVE, s4);
    assert (status>=0);
    
    /* Read the data back */
    status = H5Dread (dataset, s1_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, s1);
    assert (status>=0);

    /* Compare */
    for (i=0; i<NX*NY; i++) {
	assert (s1[i].a == 8*i+0);
	assert (s1[i].b == 8*i+1);
	assert (s1[i].c[0] == 8*i+2);
	assert (s1[i].c[1] == 8*i+3);
	assert (s1[i].c[2] == 8*i+4);
	assert (s1[i].c[3] == 8*i+5);
	assert (s1[i].d == 8*i+6);
	assert (s1[i].e == 8*i+7);
    }
    
    /*
     *######################################################################
     * STEP 7. Read the original dataset with an explicit data space.  Even
     * though these data spaces are equal it tests a different part of the
     * library.
     */
    printf ("\
STEP  7: Reading original dataset with explicit data space.\n");
    fflush (stdout);

    /* Create the data space */
    s7_sid = H5Screate_simple (2, dim, NULL);
    assert (s7_sid>=0);
    
    /* Read the dataset */
    status = H5Dread (dataset, s2_tid, s7_sid, H5S_ALL, H5P_DEFAULT, s2);
    assert (status>=0);

    /* Compare */
    for (i=0; i<NX*NY; i++) {
	assert (s2[i].a == s1[i].a);
	assert (s2[i].b == s1[i].b);
	assert (s2[i].c[0] == s1[i].c[0]);
	assert (s2[i].c[1] == s1[i].c[1]);
	assert (s2[i].c[2] == s1[i].c[2]);
	assert (s2[i].c[3] == s1[i].c[3]);
	assert (s2[i].d == s1[i].d);
	assert (s2[i].e == s1[i].e);
    }
    

    /*
     *######################################################################
     * STEP 8. Read a hyperslab of the file into a complete array in memory.
     * The hyperslab is the middle third of the array.
     */
    printf ("\
STEP  8: Read middle third hyperslab into memory array.\n");
    fflush (stdout);

    /* Create the file data space */
    s8_f_sid = H5Dget_space (dataset);
    assert (s8_f_sid>=0);
    f_offset[0] = NX/3;
    f_offset[1] = NY/3;
    h_size[0] = 2*NX/3 - f_offset[0];
    h_size[1] = 2*NY/3 - f_offset[1];
    status = H5Sselect_hyperslab (s8_f_sid, H5S_SELECT_SET, f_offset, NULL,
				  h_size, NULL);
    assert (status>=0);

    /* Create memory data space */
    s8_m_sid = H5Screate_simple (2, h_size, NULL);
    assert (s8_m_sid>=0);

    /* Read the dataset */
    s8 = calloc ((size_t)(h_size[0]*h_size[1]), sizeof(s1_t));
    assert (s8);
    status = H5Dread (dataset, s1_tid, s8_m_sid, s8_f_sid, H5P_DEFAULT, s8);
    assert (status>=0);

    /* Compare */
    for (i=0; i<h_size[0]; i++) {
	for (j=0; j<h_size[1]; j++) {
	    s1_t *ps1 = s1 + (f_offset[0]+i)*NY + f_offset[1] + j;
	    s1_t *ps8 = s8 + i*h_size[1] + j;

	    assert (ps8->a == ps1->a);
	    assert (ps8->b == ps1->b);
	    assert (ps8->c[0] == ps1->c[0]);
	    assert (ps8->c[1] == ps1->c[1]);
	    assert (ps8->c[2] == ps1->c[2]);
	    assert (ps8->c[3] == ps1->c[3]);
	    assert (ps8->d == ps1->d);
	    assert (ps8->e == ps1->e);
	}
    }

    free (s8);
    s8 = NULL;


    /*
     *######################################################################
     * STEP 9.  Read a hyperslab of the file into a hyperslab of memory.  The
     * part of memory not read is already initialized and must not change.
     */
    printf ("\
STEP  9: Read middle third of hyperslab into middle third of memory array.\n");
    fflush (stdout);

    /* Initialize */
    for (i=0; i<NX*NY; i++) {
	s2[i].a = s2[i].b = s2[i].d = s2[i].e = (unsigned)(-1);
	s2[i].c[0] = s2[i].c[1] = s2[i].c[2] = s2[i].c[3] = (unsigned)(-1);
    }
    
    /* Read the hyperslab */
    status = H5Dread (dataset, s2_tid, s8_f_sid, s8_f_sid, H5P_DEFAULT, s2);
    assert (status>=0);

    /* Compare */
    for (i=0; i<NX; i++) {
	for (j=0; j<NY; j++) {
	    s1_t *ps1 = s1 + i*NY + j;
	    s2_t *ps2 = s2 + i*NY + j;
	    if ((hssize_t)i>=f_offset[0] &&
		(hsize_t)i<f_offset[0]+h_size[0] &&
		(hssize_t)j>=f_offset[1] &&
		(hsize_t)j<f_offset[1]+h_size[1]) {
		assert (ps2->a == ps1->a);
		assert (ps2->b == ps1->b);
		assert (ps2->c[0] == ps1->c[0]);
		assert (ps2->c[1] == ps1->c[1]);
		assert (ps2->c[2] == ps1->c[2]);
		assert (ps2->c[3] == ps1->c[3]);
		assert (ps2->d == ps1->d);
		assert (ps2->e == ps1->e);
	    } else {
		assert (ps2->a == (unsigned)(-1));
		assert (ps2->b == (unsigned)(-1));
		assert (ps2->c[0] == (unsigned)(-1));
		assert (ps2->c[1] == (unsigned)(-1));
		assert (ps2->c[2] == (unsigned)(-1));
		assert (ps2->c[3] == (unsigned)(-1));
		assert (ps2->d == (unsigned)(-1));
		assert (ps2->e == (unsigned)(-1));
	    }
	}
    }
    
    /*
     *######################################################################
     * STEP 10. Same as step 9 except the memory array contains some members
     * which are already initialized, like step 5.
     */
    printf ("\
STEP 10: Read middle third of hyperslab into middle third of memory array\n\
         where some of the struct members are already initialized.\n");
    fflush (stdout);

    /* Initialize */
    for (i=0; i<NX*NY; i++) {
	s5[i].a = s5[i].b = s5[i].d = s5[i].e = (unsigned)(-1);
	s5[i].c[0] = s5[i].c[1] = s5[i].c[2] = s5[i].c[3] = (unsigned)(-1);
	s5[i].pre = s5[i].mid1 = s5[i].mid2 = s5[i].post = (unsigned)(-1);
    }
    
    /* Read the hyperslab */
    status = H5Dread (dataset, s5_tid, s8_f_sid, s8_f_sid, PRESERVE, s5);
    assert (status>=0);

    /* Compare */
    for (i=0; i<NX; i++) {
	for (j=0; j<NY; j++) {
	    s1_t *ps1 = s1 + i*NY + j;
	    s5_t *ps5 = s5 + i*NY + j;
	    if ((hssize_t)i>=f_offset[0] &&
		(hsize_t)i<f_offset[0]+h_size[0] &&
		(hssize_t)j>=f_offset[1] &&
		(hsize_t)j<f_offset[1]+h_size[1]) {
		assert (ps5->pre == (unsigned)(-1));
		assert (ps5->a == ps1->a);
		assert (ps5->b == ps1->b);
		assert (ps5->mid1 == (unsigned)(-1));
		assert (ps5->c[0] == ps1->c[0]);
		assert (ps5->c[1] == ps1->c[1]);
		assert (ps5->c[2] == ps1->c[2]);
		assert (ps5->c[3] == ps1->c[3]);
		assert (ps5->mid2 == (unsigned)(-1));
		assert (ps5->d == ps1->d);
		assert (ps5->e == ps1->e);
		assert (ps5->post == (unsigned)(-1));
	    } else {
		assert (ps5->pre == (unsigned)(-1));
		assert (ps5->a == (unsigned)(-1));
		assert (ps5->b == (unsigned)(-1));
		assert (ps5->mid1 == (unsigned)(-1));
		assert (ps5->c[0] == (unsigned)(-1));
		assert (ps5->c[1] == (unsigned)(-1));
		assert (ps5->c[2] == (unsigned)(-1));
		assert (ps5->c[3] == (unsigned)(-1));
		assert (ps5->mid2 == (unsigned)(-1));
		assert (ps5->d == (unsigned)(-1));
		assert (ps5->e == (unsigned)(-1));
		assert (ps5->post == (unsigned)(-1));
	    }
	}
    }
		
#ifdef OLD_WAY
    /*
     *######################################################################
     * Step 11: Write an array into the middle third of the dataset
     * initializeing only members `b' and `d' to -1.
     */
    printf ("\
STEP 11: Write an array back to the middle third of the dataset to\n\
         initialize the `b' and `d' members to -1.\n");
    fflush (stdout);
    
    /* Create the memory array and initialize all fields to zero */
    ndims = H5Sget_hyperslab (s8_f_sid, f_offset, h_size, h_sample);
    assert (ndims==2);
    s11 = malloc ((size_t)h_size[0]*(size_t)h_size[1]*sizeof(s4_t));
    assert (s11);

    /* Initialize */
    for (i=0; i<h_size[0]*h_size[1]; i++) {
	s11[i].b = s11[i].d = (unsigned)(-1);
    }
    
    /* Write to disk */
    status = H5Dwrite (dataset, s4_tid, s8_m_sid, s8_f_sid, PRESERVE, s11);
    assert (status>=0);
    free (s11);
    s11=NULL;

    /* Read the whole thing */
    status = H5Dread (dataset, s1_tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, s1);
    assert (status>=0);

    /* Compare */
    for (i=0; i<NX; i++) {
	for (j=0; j<NY; j++) {
	    s1_t *ps1 = s1 + i*NY + j;
	    
	    assert (ps1->a == 8*(i*NY+j)+0);
	    assert (ps1->c[0] == 8*(i*NY+j)+2);
	    assert (ps1->c[1] == 8*(i*NY+j)+3);
	    assert (ps1->c[2] == 8*(i*NY+j)+4);
	    assert (ps1->c[3] == 8*(i*NY+j)+5);
	    assert (ps1->e == 8*(i*NY+j)+7);
	    if ((hssize_t)i>=f_offset[0] &&
		(hsize_t)i<f_offset[0]+h_size[0] &&
		(hssize_t)j>=f_offset[1] &&
		(hsize_t)j<f_offset[1]+h_size[1]) {
		assert (ps1->b == (unsigned)(-1));
		assert (ps1->d == (unsigned)(-1));
	    } else {
		assert (ps1->b == 8*(i*NY+j)+1);
		assert (ps1->d == 8*(i*NY+j)+6);
	    }
	}
    }
#endif /* OLD_WAY */
    



    
    /*
     * Release resources.
     */
    H5Pclose (PRESERVE);
    H5Dclose (dataset);
    H5Fclose (file);

    cleanup();
    return 0;
}