summaryrefslogtreecommitdiffstats
path: root/hl/test/test_dset_opt.c
blob: ebe28cc9ce9df3319a7691ddeee7a06cd4816169 (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
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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.     *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include <stdlib.h>
#include <string.h>
#include "h5hltest.h"
#include "H5srcdir.h"
#include "H5DOpublic.h"
#include <zlib.h>
#include <math.h>

#define FILE_NAME "test_dectris.h5"

#define DATASETNAME1        "direct_write"
#define DATASETNAME2        "skip_one_filter"
#define DATASETNAME3        "skip_two_filters"
#define DATASETNAME4        "data_conv"
#define DATASETNAME5        "contiguous_dset"
#define DATASETNAME6        "invalid_argue"
#define RANK         2
#define NX     16
#define NY     16
#define CHUNK_NX     4
#define CHUNK_NY     4

#define DEFLATE_SIZE_ADJUST(s) (ceil(((double)(s))*1.001)+12)

/* Temporary filter IDs used for testing */
#define H5Z_FILTER_BOGUS1	305
#define H5Z_FILTER_BOGUS2	306
#define ADD_ON			7
#define FACTOR			3

/* Local prototypes for filter functions */
static size_t filter_bogus1(unsigned int flags, size_t cd_nelmts,
    const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
static size_t filter_bogus2(unsigned int flags, size_t cd_nelmts,
    const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);

/* This message derives from H5Z */
const H5Z_class2_t H5Z_BOGUS1[1] = {{
    H5Z_CLASS_T_VERS,       /* H5Z_class_t version */
    H5Z_FILTER_BOGUS1,		/* Filter id number		*/
    1, 1,               /* Encoding and decoding enabled */
    "bogus1",			/* Filter name for debugging	*/
    NULL,                       /* The "can apply" callback     */
    NULL,                       /* The "set local" callback     */
    filter_bogus1,		/* The actual filter function	*/
}};

const H5Z_class2_t H5Z_BOGUS2[1] = {{
    H5Z_CLASS_T_VERS,       /* H5Z_class_t version */
    H5Z_FILTER_BOGUS2,		/* Filter id number		*/
    1, 1,               /* Encoding and decoding enabled */
    "bogus2",			/* Filter name for debugging	*/
    NULL,                       /* The "can apply" callback     */
    NULL,                       /* The "set local" callback     */
    filter_bogus2,		/* The actual filter function	*/
}};

/*-------------------------------------------------------------------------
 * Function:	test_direct_chunk_write
 *
 * Purpose:	Test the basic functionality of H5DOwrite_chunk
 *
 * Return:	Success:	0
 *
 *		Failure:	1
 *
 * Programmer:  Raymond Lu	
 *              30 November 2012
 *
 *-------------------------------------------------------------------------
 */
static int
test_direct_chunk_write (hid_t file)
{
    hid_t       dataspace = -1, dataset = -1;
    hid_t       mem_space = -1;
    hid_t       cparms = -1, dxpl = -1;
    hsize_t     dims[2]  = {NX, NY};        
    hsize_t     maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
    hsize_t     chunk_dims[2] ={CHUNK_NX, CHUNK_NY};
    herr_t      status;
    int         ret;
    int         data[NX][NY];
    int         i, j, n;

    unsigned    filter_mask = 0;
    int         direct_buf[CHUNK_NX][CHUNK_NY];
    int         check_chunk[CHUNK_NX][CHUNK_NY];
    hsize_t     offset[2] = {0, 0};
    size_t      buf_size = CHUNK_NX*CHUNK_NY*sizeof(int);

    const Bytef *z_src = (const Bytef*)(direct_buf);
    Bytef	    *z_dst;		/*destination buffer		*/
    uLongf	     z_dst_nbytes = (uLongf)DEFLATE_SIZE_ADJUST(buf_size);
    uLong	     z_src_nbytes = (uLong)buf_size;
    int          aggression = 9;     /* Compression aggression setting */
    void	*outbuf = NULL;         /* Pointer to new buffer */

    hsize_t start[2];  /* Start of hyperslab */
    hsize_t stride[2]; /* Stride of hyperslab */
    hsize_t count[2];  /* Block count */
    hsize_t block[2];  /* Block sizes */

    TESTING("basic functionality of H5DOwrite_chunk");

    /*
     * Create the data space with unlimited dimensions.
     */
    if((dataspace = H5Screate_simple(RANK, dims, maxdims)) < 0)
        goto error;

    if((mem_space = H5Screate_simple(RANK, chunk_dims, NULL)) < 0)
        goto error;

    /*
     * Modify dataset creation properties, i.e. enable chunking and compression
     */
    if((cparms = H5Pcreate(H5P_DATASET_CREATE)) < 0)
        goto error;

    if((status = H5Pset_chunk( cparms, RANK, chunk_dims)) < 0)
        goto error;

    if((status = H5Pset_deflate( cparms, (unsigned) aggression)) < 0)
        goto error;

    /*
     * Create a new dataset within the file using cparms
     * creation properties.
     */
    if((dataset = H5Dcreate2(file, DATASETNAME1, H5T_NATIVE_INT, dataspace, H5P_DEFAULT,
			cparms, H5P_DEFAULT)) < 0)
        goto error;

    /* Initialize the dataset */
    for(i = n = 0; i < NX; i++)
        for(j = 0; j < NY; j++)
	    data[i][j] = n++;

    if((dxpl = H5Pcreate(H5P_DATASET_XFER)) < 0)
        goto error;

    /*
     * Write the data for the dataset.  It should stay in the chunk cache.
     * It will be evicted from the cache by the H5DOwrite_chunk calls. 
     */
    if((status = H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL,
		      dxpl, data)) < 0)
        goto error;

    /* Initialize data for one chunk */
    for(i = n = 0; i < CHUNK_NX; i++)
        for(j = 0; j < CHUNK_NY; j++)
	    direct_buf[i][j] = n++;

    /* Allocate output (compressed) buffer */
    outbuf = malloc(z_dst_nbytes);
    z_dst = (Bytef *)outbuf;

    /* Perform compression from the source to the destination buffer */
    ret = compress2(z_dst, &z_dst_nbytes, z_src, z_src_nbytes, aggression);

    /* Check for various zlib errors */
    if(Z_BUF_ERROR == ret) {
        fprintf(stderr, "overflow");
        goto error;
    } else if(Z_MEM_ERROR == ret) {
	fprintf(stderr, "deflate memory error");
        goto error;
    } else if(Z_OK != ret) {
	fprintf(stderr, "other deflate error");
        goto error;
    }

    /* Write the compressed chunk data repeatedly to cover all the chunks in the 
     * dataset, using the direct writing function.     */ 
    for(i=0; i<NX/CHUNK_NX; i++) {
        for(j=0; j<NY/CHUNK_NY; j++) {
            status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, z_dst_nbytes, outbuf);
            offset[1] += CHUNK_NY;
        }
        offset[0] += CHUNK_NX;
        offset[1] = 0;
    }

    if(outbuf)
        free(outbuf);

    if(H5Fflush(dataset, H5F_SCOPE_LOCAL) < 0) 
        goto error;

    if(H5Dclose(dataset) < 0)
        goto error;

    if((dataset = H5Dopen(file, DATASETNAME1, H5P_DEFAULT)) < 0)
        goto error;

    /*
     * Select hyperslab for one chunk in the file
     */
    start[0]  = CHUNK_NX; start[1]  = CHUNK_NY;
    stride[0] = 1; stride[1] = 1;
    count[0]  = 1; count[1]  = 1;
    block[0]  = CHUNK_NX; block[1]  = CHUNK_NY;
    if((status = H5Sselect_hyperslab(dataspace, H5S_SELECT_SET, start, stride, count, block)) < 0)
        goto error;

    /* Read the chunk back */
    if((status = H5Dread(dataset, H5T_NATIVE_INT, mem_space, dataspace, H5P_DEFAULT, check_chunk)) < 0)
        goto error;

    /* Check that the values read are the same as the values written */
    for(i = 0; i < CHUNK_NX; i++) {
        for(j = 0; j < CHUNK_NY; j++) {
            if(direct_buf[i][j] != check_chunk[i][j]) {
                printf("    1. Read different values than written.");
                printf("    At index %d,%d\n", i, j);
                printf("    direct_buf=%d, check_chunk=%d\n", direct_buf[i][j], check_chunk[i][j]); 
                goto error;
            }
        }
    }

    /* Reinitialize different data for one chunk */
    for(i = 0; i < CHUNK_NX; i++)
        for(j = 0; j < CHUNK_NY; j++)
	    direct_buf[i][j] = i + j;

    /* Allocate output (compressed) buffer */
    outbuf = malloc(z_dst_nbytes);
    z_dst = (Bytef *)outbuf;

    /* Perform compression from the source to the destination buffer */
    ret = compress2(z_dst, &z_dst_nbytes, z_src, z_src_nbytes, aggression);

    /* Check for various zlib errors */
    if(Z_BUF_ERROR == ret) {
        fprintf(stderr, "overflow");
        goto error;
    } else if(Z_MEM_ERROR == ret) {
	fprintf(stderr, "deflate memory error");
        goto error;
    } else if(Z_OK != ret) {
	fprintf(stderr, "other deflate error");
        goto error;
    }

    /* Rewrite the compressed chunk data repeatedly to cover all the chunks in the 
     * dataset, using the direct writing function.     */ 
    offset[0] = offset[1] = 0;
    for(i=0; i<NX/CHUNK_NX; i++) {
        for(j=0; j<NY/CHUNK_NY; j++) {
            status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, z_dst_nbytes, outbuf);
            offset[1] += CHUNK_NY;
        }
        offset[0] += CHUNK_NX;
        offset[1] = 0;
    }

    if(outbuf)
        free(outbuf);

    if(H5Fflush(dataset, H5F_SCOPE_LOCAL) < 0) 
        goto error;

    if(H5Dclose(dataset) < 0)
        goto error;

    if((dataset = H5Dopen(file, DATASETNAME1, H5P_DEFAULT)) < 0)
        goto error;

    /* Read the chunk back */
    if((status = H5Dread(dataset, H5T_NATIVE_INT, mem_space, dataspace, H5P_DEFAULT, check_chunk)) < 0)
        goto error;

    /* Check that the values read are the same as the values written */
    for(i = 0; i < CHUNK_NX; i++) {
        for(j = 0; j < CHUNK_NY; j++) {
            if(direct_buf[i][j] != check_chunk[i][j]) {
                printf("    2. Read different values than written.");
                printf("    At index %d,%d\n", i, j);
                printf("    direct_buf=%d, check_chunk=%d\n", direct_buf[i][j], check_chunk[i][j]); 
                goto error;
            }
        }
    }

    /*
     * Close/release resources.
     */
    H5Dclose(dataset);
    H5Sclose(mem_space);
    H5Sclose(dataspace);
    H5Pclose(cparms);
    H5Pclose(dxpl);
    
    PASSED();
    return 0;

error:
    H5E_BEGIN_TRY {
        H5Dclose(dataset);
        H5Sclose(mem_space);
        H5Sclose(dataspace);
        H5Pclose(cparms);
        H5Pclose(dxpl);
    } H5E_END_TRY;

    if(outbuf)
        free(outbuf);

    return 1;
}

/*-------------------------------------------------------------------------
 * Function:	test_skip_compress_write1
 *
 * Purpose:	Test skipping compression filter when it is the only filter
 *              for the dataset
 *
 * Return:	Success:	0
 *
 *		Failure:	1
 *
 * Programmer:  Raymond Lu	
 *              30 November 2012
 *
 *-------------------------------------------------------------------------
 */
static int
test_skip_compress_write1(hid_t file)
{
    hid_t       dataspace = -1, dataset = -1;
    hid_t       mem_space = -1;
    hid_t       cparms = -1, dxpl = -1;
    hsize_t     dims[2]  = {NX, NY};        
    hsize_t     maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
    hsize_t     chunk_dims[2] ={CHUNK_NX, CHUNK_NY};
    herr_t      status;
    int         i, j, n;

    unsigned    filter_mask = 0;
    int         direct_buf[CHUNK_NX][CHUNK_NY];
    int         check_chunk[CHUNK_NX][CHUNK_NY];
    hsize_t     offset[2] = {0, 0};
    size_t      buf_size = CHUNK_NX*CHUNK_NY*sizeof(int);
    int         aggression = 9;     /* Compression aggression setting */

    hsize_t start[2];  /* Start of hyperslab */
    hsize_t stride[2]; /* Stride of hyperslab */
    hsize_t count[2];  /* Block count */
    hsize_t block[2];  /* Block sizes */

    TESTING("skipping compression filter for H5DOwrite_chunk");

    /*
     * Create the data space with unlimited dimensions.
     */
    if((dataspace = H5Screate_simple(RANK, dims, maxdims)) < 0)
        goto error;

    if((mem_space = H5Screate_simple(RANK, chunk_dims, NULL)) < 0)
        goto error;

    /*
     * Modify dataset creation properties, i.e. enable chunking and compression
     */
    if((cparms = H5Pcreate(H5P_DATASET_CREATE)) < 0)
        goto error;

    if((status = H5Pset_chunk( cparms, RANK, chunk_dims)) < 0)
        goto error;

    if((status = H5Pset_deflate( cparms, (unsigned ) aggression)) < 0)
        goto error;

    /*
     * Create a new dataset within the file using cparms
     * creation properties.
     */
    if((dataset = H5Dcreate2(file, DATASETNAME2, H5T_NATIVE_INT, dataspace, H5P_DEFAULT,
			cparms, H5P_DEFAULT)) < 0)
        goto error;

    if((dxpl = H5Pcreate(H5P_DATASET_XFER)) < 0)
        goto error;

    /* Initialize data for one chunk */
    for(i = n = 0; i < CHUNK_NX; i++)
        for(j = 0; j < CHUNK_NY; j++) {
	    direct_buf[i][j] = n++;
    }

    /* write the uncompressed chunk data repeatedly to dataset, using the direct writing function. 
     * Indicate skipping the compression filter.     */ 
    offset[0] = CHUNK_NX;
    offset[1] = CHUNK_NY;

    filter_mask = 0x00000001;

    if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, buf_size, direct_buf)) < 0)
        goto error;

    if(H5Fflush(dataset, H5F_SCOPE_LOCAL) < 0) 
        goto error;

    if(H5Dclose(dataset) < 0)
        goto error;

    if((dataset = H5Dopen(file, DATASETNAME2, H5P_DEFAULT)) < 0)
        goto error;

    /*
     * Select hyperslab for the chunk just written in the file
     */
    start[0]  = CHUNK_NX; start[1]  = CHUNK_NY;
    stride[0] = 1; stride[1] = 1;
    count[0]  = 1; count[1]  = 1;
    block[0]  = CHUNK_NX; block[1]  = CHUNK_NY;
    if((status = H5Sselect_hyperslab(dataspace, H5S_SELECT_SET, start, stride, count, block)) < 0)
        goto error;

    /* Read the chunk back */
    if((status = H5Dread(dataset, H5T_NATIVE_INT, mem_space, dataspace, H5P_DEFAULT, check_chunk)) < 0)
        goto error;

    /* Check that the values read are the same as the values written */
    for(i = 0; i < CHUNK_NX; i++) {
        for(j = 0; j < CHUNK_NY; j++) {
            if(direct_buf[i][j] != check_chunk[i][j]) {
                printf("    1. Read different values than written.");
                printf("    At index %d,%d\n", i, j);
                printf("    direct_buf=%d, check_chunk=%d\n", direct_buf[i][j], check_chunk[i][j]); 
                goto error;
            }
        }
    }

    /*
     * Close/release resources.
     */
    H5Dclose(dataset);
    H5Sclose(mem_space);
    H5Sclose(dataspace);
    H5Pclose(cparms);
    H5Pclose(dxpl);
    
    PASSED();
    return 0;

error:
    H5E_BEGIN_TRY {
        H5Dclose(dataset);
        H5Sclose(mem_space);
        H5Sclose(dataspace);
        H5Pclose(cparms);
        H5Pclose(dxpl);
    } H5E_END_TRY;

    return 1;
}

/*-------------------------------------------------------------------------
 * Function:	filter_bogus1
 *
 * Purpose:	A bogus filte that adds ADD_ON to the original value
 *
 * Return:	Success:	Data chunk size
 *
 * Programmer:  Raymond Lu	
 *              30 November 2012
 *
 *-------------------------------------------------------------------------
 */
static size_t
filter_bogus1(unsigned int flags, size_t UNUSED cd_nelmts,
      const unsigned int UNUSED *cd_values, size_t nbytes,
      size_t *buf_size, void **buf)
{
    int *int_ptr=(int *)*buf;          /* Pointer to the data values */
    size_t buf_left=*buf_size;  /* Amount of data buffer left to process */

    if(flags & H5Z_FLAG_REVERSE) { /* read */
        /* Substract the "add on" value to all the data values */
        while(buf_left>0) {
            *int_ptr++ -= (int)ADD_ON;
            buf_left -= sizeof(int);
        } /* end while */
    } /* end if */
    else { /* write */
        /* Add the "add on" value to all the data values */
        while(buf_left>0) {
            *int_ptr++ += (int)ADD_ON;
            buf_left -= sizeof(int);
        } /* end while */
    } /* end else */

    return nbytes;
}

/*-------------------------------------------------------------------------
 * Function:	filter_bogus2
 *
 * Purpose:	A bogus filter that multiplies the original value by FACTOR.
 *
 * Return:	Success:	Data chunk size
 *
 * Programmer:  Raymond Lu	
 *              30 November 2012
 *-------------------------------------------------------------------------
 */
static size_t
filter_bogus2(unsigned int flags, size_t UNUSED cd_nelmts,
      const unsigned int UNUSED *cd_values, size_t nbytes,
      size_t *buf_size, void **buf)
{
    int *int_ptr=(int *)*buf;          /* Pointer to the data values */
    size_t buf_left=*buf_size;  /* Amount of data buffer left to process */

    if(flags & H5Z_FLAG_REVERSE) { /* read */
        /* Substract the "add on" value to all the data values */
        while(buf_left>0) {
            *int_ptr++ /= (int)FACTOR;
            buf_left -= sizeof(int);
        } /* end while */
    } /* end if */
    else { /* write */
        /* Add the "add on" value to all the data values */
        while(buf_left>0) {
            *int_ptr++ *= (int)FACTOR;
            buf_left -= sizeof(int);
        } /* end while */
    } /* end else */

    return nbytes;
}

/*-------------------------------------------------------------------------
 * Function:	test_skip_compress_write2
 *
 * Purpose:	Test skipping compression filter when there are three filters
 *              for the dataset
 *
 * Return:	Success:	0
 *
 *		Failure:	1
 *
 * Programmer:  Raymond Lu	
 *              30 November 2012
 *
 *-------------------------------------------------------------------------
 */
static int
test_skip_compress_write2(hid_t file)
{
    hid_t       dataspace = -1, dataset = -1;
    hid_t       mem_space = -1;
    hid_t       cparms = -1, dxpl = -1;
    hsize_t     dims[2]  = {NX, NY};        
    hsize_t     maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
    hsize_t     chunk_dims[2] ={CHUNK_NX, CHUNK_NY};
    herr_t      status;
    int         i, j, n;

    unsigned    filter_mask = 0;
    int         origin_direct_buf[CHUNK_NX][CHUNK_NY];
    int         direct_buf[CHUNK_NX][CHUNK_NY];
    int         check_chunk[CHUNK_NX][CHUNK_NY];
    hsize_t     offset[2] = {0, 0};
    size_t      buf_size = CHUNK_NX*CHUNK_NY*sizeof(int);
    int          aggression = 9;     /* Compression aggression setting */

    hsize_t start[2];  /* Start of hyperslab */
    hsize_t stride[2]; /* Stride of hyperslab */
    hsize_t count[2];  /* Block count */
    hsize_t block[2];  /* Block sizes */

    TESTING("skipping compression filters but keep two other filters");

    /*
     * Create the data space with unlimited dimensions.
     */
    if((dataspace = H5Screate_simple(RANK, dims, maxdims)) < 0)
        goto error;

    if((mem_space = H5Screate_simple(RANK, chunk_dims, NULL)) < 0)
        goto error;

    /*
     * Modify dataset creation properties, i.e. enable chunking and compression.
     * The order of filters is bogus 1 + deflate + bogus 2.
     */
    if((cparms = H5Pcreate(H5P_DATASET_CREATE)) < 0)
        goto error;

    if((status = H5Pset_chunk( cparms, RANK, chunk_dims)) < 0)
        goto error;

    /* Register and enable first bogus filter */
    if(H5Zregister (H5Z_BOGUS1) < 0) 
	goto error;

    if(H5Pset_filter(cparms, H5Z_FILTER_BOGUS1, 0, (size_t)0, NULL) < 0) 
	goto error;

    /* Enable compression filter */
    if((status = H5Pset_deflate( cparms, (unsigned) aggression)) < 0)
        goto error;

    /* Register and enable second bogus filter */
    if(H5Zregister (H5Z_BOGUS2) < 0) 
	goto error;

    if(H5Pset_filter(cparms, H5Z_FILTER_BOGUS2, 0, (size_t)0, NULL) < 0) 
	goto error;

    /*
     * Create a new dataset within the file using cparms
     * creation properties.
     */
    if((dataset = H5Dcreate2(file, DATASETNAME3, H5T_NATIVE_INT, dataspace, H5P_DEFAULT,
			cparms, H5P_DEFAULT)) < 0)
        goto error;

    if((dxpl = H5Pcreate(H5P_DATASET_XFER)) < 0)
        goto error;

    /* Initialize data for one chunk. Apply operations of two bogus filters to the chunk */
    for(i = n = 0; i < CHUNK_NX; i++)
        for(j = 0; j < CHUNK_NY; j++) {
	    origin_direct_buf[i][j] = n++;
	    direct_buf[i][j] = (origin_direct_buf[i][j] + ADD_ON) * FACTOR;
    }

    /* write the uncompressed chunk data repeatedly to dataset, using the direct writing function. 
     * Indicate skipping the compression filter but keep the other two bogus filters */ 
    offset[0] = CHUNK_NX;
    offset[1] = CHUNK_NY;

    /* compression filter is the middle one to be skipped */
    filter_mask = 0x00000002;

    if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, buf_size, direct_buf)) < 0)
        goto error;

    if(H5Fflush(dataset, H5F_SCOPE_LOCAL) < 0) 
        goto error;

    if(H5Dclose(dataset) < 0)
        goto error;

    if((dataset = H5Dopen(file, DATASETNAME3, H5P_DEFAULT)) < 0)
        goto error;

    /*
     * Select hyperslab for one chunk in the file
     */
    start[0]  = CHUNK_NX; start[1]  = CHUNK_NY;
    stride[0] = 1; stride[1] = 1;
    count[0]  = 1; count[1]  = 1;
    block[0]  = CHUNK_NX; block[1]  = CHUNK_NY;
    if((status = H5Sselect_hyperslab(dataspace, H5S_SELECT_SET, start, stride, count, block)) < 0)
        goto error;

    /* Read the chunk back */
    if((status = H5Dread(dataset, H5T_NATIVE_INT, mem_space, dataspace, H5P_DEFAULT, check_chunk)) < 0)
        goto error;

    /* Check that the values read are the same as the values written */
    for(i = 0; i < CHUNK_NX; i++) {
        for(j = 0; j < CHUNK_NY; j++) {
            if(origin_direct_buf[i][j] != check_chunk[i][j]) {
                printf("    1. Read different values than written.");
                printf("    At index %d,%d\n", i, j);
                printf("    origin_direct_buf=%d, check_chunk=%d\n", origin_direct_buf[i][j], check_chunk[i][j]); 
                goto error;
            }
        }
    }

    /*
     * Close/release resources.
     */
    H5Dclose(dataset);
    H5Sclose(mem_space);
    H5Sclose(dataspace);
    H5Pclose(cparms);
    H5Pclose(dxpl);
    
    PASSED();
    return 0;

error:
    H5E_BEGIN_TRY {
        H5Dclose(dataset);
        H5Sclose(mem_space);
        H5Sclose(dataspace);
        H5Pclose(cparms);
        H5Pclose(dxpl);
    } H5E_END_TRY;

    return 1;
}

/*-------------------------------------------------------------------------
 * Function:	test_data_conv
 *
 * Purpose:	Test data conversion
 *
 * Return:	Success:	0
 *
 *		Failure:	1
 *
 * Programmer:  Raymond Lu	
 *              30 November 2012
 *
 *-------------------------------------------------------------------------
 */
static int
test_data_conv(hid_t file)
{
    typedef struct {
	int a, b, c[4], d, e;
    } src_type_t;
    typedef struct {
	int a,    c[4],    e;
    } dst_type_t;

    hid_t       dataspace = -1, dataset = -1;
    hid_t       mem_space = -1;
    hid_t       cparms = -1, dxpl = -1;
    hsize_t     dims[2]  = {NX, NY};        
    hsize_t     maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
    hsize_t     chunk_dims[2] ={CHUNK_NX, CHUNK_NY};
    herr_t      status;
    int         i, j, n;
    const hsize_t	four = 4;
    hid_t	st=-1, dt=-1;
    hid_t       array_dt;

    unsigned    filter_mask = 0;
    src_type_t  direct_buf[CHUNK_NX][CHUNK_NY];
    dst_type_t  check_chunk[CHUNK_NX][CHUNK_NY];
    hsize_t     offset[2] = {0, 0};
    size_t      buf_size = CHUNK_NX*CHUNK_NY*sizeof(src_type_t);

    hsize_t start[2];  /* Start of hyperslab */
    hsize_t stride[2]; /* Stride of hyperslab */
    hsize_t count[2];  /* Block count */
    hsize_t block[2];  /* Block sizes */

    TESTING("data conversion for H5DOwrite_chunk");

    /*
     * Create the data space with unlimited dimensions.
     */
    if((dataspace = H5Screate_simple(RANK, dims, maxdims)) < 0)
        goto error;

    if((mem_space = H5Screate_simple(RANK, chunk_dims, NULL)) < 0)
        goto error;

    /*
     * Modify dataset creation properties, i.e. enable chunking
     */
    if((cparms = H5Pcreate(H5P_DATASET_CREATE)) < 0)
        goto error;

    if((status = H5Pset_chunk( cparms, RANK, chunk_dims)) < 0)
        goto error;

    /* Build hdf5 datatypes */
    array_dt = H5Tarray_create2(H5T_NATIVE_INT, 1, &four);
    if((st = H5Tcreate(H5T_COMPOUND, sizeof(src_type_t))) < 0 ||
            H5Tinsert(st, "a", HOFFSET(src_type_t, a), H5T_NATIVE_INT) < 0 ||
            H5Tinsert(st, "b", HOFFSET(src_type_t, b), H5T_NATIVE_INT) < 0 ||
            H5Tinsert(st, "c", HOFFSET(src_type_t, c), array_dt) < 0 ||
            H5Tinsert(st, "d", HOFFSET(src_type_t, d), H5T_NATIVE_INT) < 0 ||
            H5Tinsert(st, "e", HOFFSET(src_type_t, e), H5T_NATIVE_INT) < 0)
        goto error;

    if(H5Tclose(array_dt) < 0)
        goto error;

    array_dt = H5Tarray_create2(H5T_NATIVE_INT, 1, &four);
    if((dt = H5Tcreate(H5T_COMPOUND, sizeof(dst_type_t))) < 0 ||
            H5Tinsert(dt, "a", HOFFSET(dst_type_t, a), H5T_NATIVE_INT) < 0 ||
            H5Tinsert(dt, "c", HOFFSET(dst_type_t, c), array_dt) < 0 ||
            H5Tinsert(dt, "e", HOFFSET(dst_type_t, e), H5T_NATIVE_INT) < 0)
        goto error;

    if(H5Tclose(array_dt) < 0)
        goto error;

    /*
     * Create a new dataset within the file using cparms
     * creation properties.
     */
    if((dataset = H5Dcreate2(file, DATASETNAME4, st, dataspace, H5P_DEFAULT,
			cparms, H5P_DEFAULT)) < 0)
        goto error;

    if((dxpl = H5Pcreate(H5P_DATASET_XFER)) < 0)
        goto error;

    /* Initialize data for one chunk */
    for(i = n = 0; i < CHUNK_NX; i++) {
        for(j = 0; j < CHUNK_NY; j++) {
            (direct_buf[i][j]).a    = i*j+0;
            (direct_buf[i][j]).b    = i*j+1;
            (direct_buf[i][j]).c[0] = i*j+2;
            (direct_buf[i][j]).c[1] = i*j+3;
            (direct_buf[i][j]).c[2] = i*j+4;
            (direct_buf[i][j]).c[3] = i*j+5;
            (direct_buf[i][j]).d    = i*j+6;
            (direct_buf[i][j]).e    = i*j+7;
        }
    }

    /* write the chunk data to dataset, using the direct writing function. 
     * There should be no data conversion involved. */
    offset[0] = CHUNK_NX;
    offset[1] = CHUNK_NY;

    if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, buf_size, direct_buf)) < 0)
        goto error;

    if(H5Fflush(dataset, H5F_SCOPE_LOCAL) < 0) 
        goto error;

    if(H5Dclose(dataset) < 0)
        goto error;

    if((dataset = H5Dopen(file, DATASETNAME4, H5P_DEFAULT)) < 0)
        goto error;

    /*
     * Select hyperslab for the chunk just written in the file
     */
    start[0]  = CHUNK_NX; start[1]  = CHUNK_NY;
    stride[0] = 1; stride[1] = 1;
    count[0]  = 1; count[1]  = 1;
    block[0]  = CHUNK_NX; block[1]  = CHUNK_NY;
    if((status = H5Sselect_hyperslab(dataspace, H5S_SELECT_SET, start, stride, count, block)) < 0)
        goto error;

    /* Read the chunk back. Data should be converted */
    if((status = H5Dread(dataset, dt, mem_space, dataspace, H5P_DEFAULT, check_chunk)) < 0)
        goto error;

    /* Check that the values read are the same as the values written */
    for(i = 0; i < CHUNK_NX; i++) {
        for(j = 0; j < CHUNK_NY; j++) {
	    if ((direct_buf[i][j]).a    != (check_chunk[i][j]).a    ||
	        (direct_buf[i][j]).c[0] != (check_chunk[i][j]).c[0] ||
	        (direct_buf[i][j]).c[1] != (check_chunk[i][j]).c[1] ||
	        (direct_buf[i][j]).c[2] != (check_chunk[i][j]).c[2] ||
	        (direct_buf[i][j]).c[3] != (check_chunk[i][j]).c[3] ||
	        (direct_buf[i][j]).e    != (check_chunk[i][j]).e) {
                printf("    1. Read different values than written.");
                printf("    At index %d,%d\n", i, j);
	        printf("    src={a=%d, b=%d, c=[%d,%d,%d,%d], d=%d, e=%d\n",
                   (direct_buf[i][j]).a, (direct_buf[i][j]).b, (direct_buf[i][j]).c[0], (direct_buf[i][j]).c[1], 
                   (direct_buf[i][j]).c[2], (direct_buf[i][j]).c[3], (direct_buf[i][j]).d, (direct_buf[i][j]).e);
	        printf("    dst={a=%d, c=[%d,%d,%d,%d], e=%d\n",
                   (check_chunk[i][j]).a, (check_chunk[i][j]).c[0], (check_chunk[i][j]).c[1], (check_chunk[i][j]).c[2], 
                   (check_chunk[i][j]).c[3], (check_chunk[i][j]).e);

	    goto error;
            }
        }
    }

    /*
     * Close/release resources.
     */
    H5Dclose(dataset);
    H5Sclose(mem_space);
    H5Sclose(dataspace);
    H5Pclose(cparms);
    H5Pclose(dxpl);
    H5Tclose(st);
    H5Tclose(dt);


    PASSED();
    return 0;

error:
    H5E_BEGIN_TRY {
        H5Dclose(dataset);
        H5Sclose(mem_space);
        H5Sclose(dataspace);
        H5Pclose(cparms);
        H5Pclose(dxpl);
        H5Tclose(st);
        H5Tclose(dt);
    } H5E_END_TRY;

    return 1;
}

/*-------------------------------------------------------------------------
 * Function:	test_invalid_parameters
 *
 * Purpose:	Test invalid parameters for H5DOwrite_chunk
 *
 * Return:	Success:	0
 *
 *		Failure:	1
 *
 * Programmer:  Raymond Lu	
 *              30 November 2012
 *
 *-------------------------------------------------------------------------
 */
static int
test_invalid_parameters(hid_t file)
{
    hid_t       dataspace = -1, dataset = -1;
    hid_t       mem_space = -1;
    hid_t       cparms = -1, dxpl = -1;
    hsize_t     dims[2]  = {NX, NY};        
    hsize_t     chunk_dims[2] ={CHUNK_NX, CHUNK_NY};
    herr_t      status;
    int         i, j, n;

    unsigned    filter_mask = 0;
    int         direct_buf[CHUNK_NX][CHUNK_NY];
    int         check_chunk[CHUNK_NX][CHUNK_NY];
    hsize_t     offset[2] = {0, 0};
    size_t      buf_size = CHUNK_NX*CHUNK_NY*sizeof(int);
    int         aggression = 9;     /* Compression aggression setting */

    TESTING("invalid parameters for H5DOwrite_chunk");

    /*
     * Create the data space with unlimited dimensions.
     */
    if((dataspace = H5Screate_simple(RANK, dims, NULL)) < 0)
        goto error;

    if((mem_space = H5Screate_simple(RANK, chunk_dims, NULL)) < 0)
        goto error;

    /*
     * Modify dataset creation properties
     */
    if((cparms = H5Pcreate(H5P_DATASET_CREATE)) < 0)
        goto error;

    /*
     * Create a new contiguous dataset to verify H5DOwrite_chunk doesn't work
     */
    if((dataset = H5Dcreate2(file, DATASETNAME5, H5T_NATIVE_INT, dataspace, H5P_DEFAULT,
			cparms, H5P_DEFAULT)) < 0)
        goto error;

    if((dxpl = H5Pcreate(H5P_DATASET_XFER)) < 0)
        goto error;

    /* Initialize data for one chunk */
    for(i = n = 0; i < CHUNK_NX; i++)
        for(j = 0; j < CHUNK_NY; j++) {
	    direct_buf[i][j] = n++;
    }

    /* Try to write the chunk data to contiguous dataset.  It should fail */
    offset[0] = CHUNK_NX;
    offset[1] = CHUNK_NY;

    H5E_BEGIN_TRY {
        if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, buf_size, direct_buf)) != FAIL)
            goto error;
    } H5E_END_TRY;

    if(H5Dclose(dataset) < 0)
        goto error;

    /* Create a chunked dataset with compression filter */
    if((status = H5Pset_chunk( cparms, RANK, chunk_dims)) < 0)
        goto error;

    if((status = H5Pset_deflate( cparms, (unsigned ) aggression)) < 0)
        goto error;

    /*
     * Create a new dataset within the file using cparms
     * creation properties.
     */
    if((dataset = H5Dcreate2(file, DATASETNAME6, H5T_NATIVE_INT, dataspace, H5P_DEFAULT,
			cparms, H5P_DEFAULT)) < 0)
        goto error;

    /* Check invalid dataset ID */ 
    H5E_BEGIN_TRY {
        if((status = H5DOwrite_chunk(-1, dxpl, filter_mask, offset, buf_size, direct_buf)) != FAIL)
            goto error;
    } H5E_END_TRY;

    /* Check invalid DXPL ID */
    H5E_BEGIN_TRY {
        if((status = H5DOwrite_chunk(dataset, -1, filter_mask, offset, buf_size, direct_buf)) != FAIL)
            goto error;
    } H5E_END_TRY;

    /* Check invalid OFFSET */
    H5E_BEGIN_TRY {
        if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, NULL, buf_size, direct_buf)) != FAIL)
            goto error;
    } H5E_END_TRY;

    /* Check when OFFSET is out of dataset range */
    offset[0] = NX + 1;
    offset[1] = NY;
    H5E_BEGIN_TRY {
        if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, buf_size, direct_buf)) != FAIL)
            goto error;
    } H5E_END_TRY;

    /* Check when OFFSET is not on chunk boundary */
    offset[0] = CHUNK_NX;
    offset[1] = CHUNK_NY + 1;
    H5E_BEGIN_TRY {
        if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, buf_size, direct_buf)) != FAIL)
            goto error;
    } H5E_END_TRY;

    /* Check invalid buffer size */
    offset[0] = CHUNK_NX;
    offset[1] = CHUNK_NY;
    buf_size = 0; 
    H5E_BEGIN_TRY {
        if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, buf_size, direct_buf)) != FAIL)
            goto error;
    } H5E_END_TRY;

    /* Check invalid data buffer */
    buf_size = CHUNK_NX*CHUNK_NY*sizeof(int);
    H5E_BEGIN_TRY {
        if((status = H5DOwrite_chunk(dataset, dxpl, filter_mask, offset, buf_size, NULL)) != FAIL)
            goto error;
    } H5E_END_TRY;

    if(H5Dclose(dataset) < 0)
        goto error;

    /*
     * Close/release resources.
     */
    H5Sclose(mem_space);
    H5Sclose(dataspace);
    H5Pclose(cparms);
    H5Pclose(dxpl);
    
    PASSED();
    return 0;

error:
    H5E_BEGIN_TRY {
        H5Dclose(dataset);
        H5Sclose(mem_space);
        H5Sclose(dataspace);
        H5Pclose(cparms);
        H5Pclose(dxpl);
    } H5E_END_TRY;

    return 1;
}

/*-------------------------------------------------------------------------
 * Function:	Main function
 *
 * Purpose:	Test direct chunk write function H5DOwrite_chunk
 *
 * Return:	Success:	0
 *
 *		Failure:	1
 *
 * Programmer:  Raymond Lu	
 *              30 November 2012
 *
 *-------------------------------------------------------------------------
 */
int main( void )
{
    hid_t file_id;
    int   nerrors=0;

    /*
     * Create a new file. If file exists its contents will be overwritten.
     */
    if((file_id = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT)) < 0)
        goto error;

    /* Test direct chunk write */
    nerrors += test_direct_chunk_write(file_id);
    nerrors += test_skip_compress_write1(file_id);
    nerrors += test_skip_compress_write2(file_id);
    nerrors += test_data_conv(file_id);
    nerrors += test_invalid_parameters(file_id);

    if(H5Fclose(file_id) < 0)
        goto error;

    /* check for errors */
    if (nerrors)
        goto error;

    return 0;

error:
    return 1;
}