summaryrefslogtreecommitdiffstats
path: root/src/H5Dbtree.c
blob: 9fcf1fd1e92f755d788a9d7fb82e9ba18e43e23c (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
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/* Programmer: 	Robb Matzke <matzke@llnl.gov>
 *	       	Wednesday, October  8, 1997
 *
 * Purpose:	v1 B-tree indexed (chunked) I/O functions.  The chunks are
 *              given a multi-dimensional index which is used as a lookup key
 *              in a B-tree that maps chunk index to disk address.
 *
 */

/****************/
/* Module Setup */
/****************/

#define H5D_PACKAGE		/*suppress error about including H5Dpkg	  */


/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions			*/
#include "H5Bprivate.h"		/* B-link trees				*/
#include "H5Dpkg.h"		/* Datasets				*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5Fprivate.h"		/* Files				*/
#include "H5FDprivate.h"	/* File drivers				*/
#include "H5FLprivate.h"	/* Free Lists                           */
#include "H5Iprivate.h"		/* IDs			  		*/
#include "H5MFprivate.h"	/* File space management		*/
#include "H5Oprivate.h"		/* Object headers		  	*/
#include "H5Sprivate.h"         /* Dataspaces                           */
#include "H5Vprivate.h"		/* Vector and array functions		*/

/****************/
/* Local Macros */
/****************/

/*
 * Given a B-tree node return the dimensionality of the chunks pointed to by
 * that node.
 */
#define H5D_BTREE_NDIMS(X)	(((X)->sizeof_rkey-8)/8)

/******************/
/* Local Typedefs */
/******************/

/*
 * B-tree key.	A key contains the minimum logical N-dimensional coordinates and
 * the logical size of the chunk to which this key refers.  The
 * fastest-varying dimension is assumed to reference individual bytes of the
 * array, so a 100-element 1-d array of 4-byte integers would really be a 2-d
 * array with the slow varying dimension of size 100 and the fast varying
 * dimension of size 4 (the storage dimensionality has very little to do with
 * the real dimensionality).
 *
 * Only the first few values of the OFFSET and SIZE fields are actually
 * stored on disk, depending on the dimensionality.
 *
 * The chunk's file address is part of the B-tree and not part of the key.
 */
typedef struct H5D_btree_key_t {
    uint32_t	nbytes;				/*size of stored data	*/
    hsize_t	offset[H5O_LAYOUT_NDIMS];	/*logical offset to start*/
    unsigned	filter_mask;			/*excluded filters	*/
} H5D_btree_key_t;

/* B-tree callback info for iteration over chunks */
typedef struct H5D_btree_it_ud_t {
    H5D_chunk_common_ud_t common;		/* Common info for B-tree user data (must be first) */
    H5D_chunk_cb_func_t cb;                     /* Chunk callback routine */
    void		*udata;	                /* User data for chunk callback routine */
} H5D_btree_it_ud_t;

/* B-tree callback info for debugging */
typedef struct H5D_btree_dbg_t {
    H5D_chunk_common_ud_t common;               /* Common info for B-tree user data (must be first) */
    unsigned            ndims;                  /* Number of dimensions */
} H5D_btree_dbg_t;


/********************/
/* Local Prototypes */
/********************/

static herr_t H5D_btree_shared_create(const H5F_t *f, H5O_storage_chunk_t *store,
    unsigned ndims);

/* B-tree iterator callbacks */
static int H5D_btree_idx_iterate_cb(H5F_t *f, hid_t dxpl_id, const void *left_key,
    haddr_t addr, const void *right_key, void *_udata);

/* B-tree callbacks */
static H5RC_t *H5D_btree_get_shared(const H5F_t *f, const void *_udata);
static herr_t H5D_btree_new_node(H5F_t *f, hid_t dxpl_id, H5B_ins_t, void *_lt_key,
    void *_udata, void *_rt_key, haddr_t *addr_p /*out*/);
static int H5D_btree_cmp2(void *_lt_key, void *_udata, void *_rt_key);
static int H5D_btree_cmp3(void *_lt_key, void *_udata, void *_rt_key);
static htri_t H5D_btree_found(H5F_t *f, hid_t dxpl_id, haddr_t addr,
    const void *_lt_key, void *_udata);
static H5B_ins_t H5D_btree_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr,
    void *_lt_key, hbool_t *lt_key_changed, void *_md_key, void *_udata,
    void *_rt_key, hbool_t *rt_key_changed, haddr_t *new_node/*out*/);
static H5B_ins_t H5D_btree_remove( H5F_t *f, hid_t dxpl_id, haddr_t addr,
    void *_lt_key, hbool_t *lt_key_changed, void *_udata, void *_rt_key,
    hbool_t *rt_key_changed);
static herr_t H5D_btree_decode_key(const H5B_shared_t *shared, const uint8_t *raw,
    void *_key);
static herr_t H5D_btree_encode_key(const H5B_shared_t *shared, uint8_t *raw,
    const void *_key);
static herr_t H5D_btree_debug_key(FILE *stream, int indent, int fwidth,
    const void *key, const void *udata);

/* Chunked layout indexing callbacks */
static herr_t H5D_btree_idx_init(const H5D_chk_idx_info_t *idx_info,
    const H5S_t *space, haddr_t dset_ohdr_addr);
static herr_t H5D_btree_idx_create(const H5D_chk_idx_info_t *idx_info);
static hbool_t H5D_btree_idx_is_space_alloc(const H5O_storage_chunk_t *storage);
static herr_t H5D_btree_idx_insert(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_ud_t *udata);
static herr_t H5D_btree_idx_get_addr(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_ud_t *udata);
static int H5D_btree_idx_iterate(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_cb_func_t chunk_cb, void *chunk_udata);
static herr_t H5D_btree_idx_remove(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_common_ud_t *udata);
static herr_t H5D_btree_idx_delete(const H5D_chk_idx_info_t *idx_info);
static herr_t H5D_btree_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
    const H5D_chk_idx_info_t *idx_info_dst);
static herr_t H5D_btree_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
    H5O_storage_chunk_t *storage_dst, hid_t dxpl_id);
static herr_t H5D_btree_idx_size(const H5D_chk_idx_info_t *idx_info,
    hsize_t *size);
static herr_t H5D_btree_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr);
static herr_t H5D_btree_idx_dump(const H5O_storage_chunk_t *storage,
    FILE *stream);
static herr_t H5D_btree_idx_dest(const H5D_chk_idx_info_t *idx_info);


/*********************/
/* Package Variables */
/*********************/

/* v1 B-tree indexed chunk I/O ops */
const H5D_chunk_ops_t H5D_COPS_BTREE[1] = {{
    FALSE,                               /* v1 B-tree indices don't support SWMR access */
    H5D_btree_idx_init,
    H5D_btree_idx_create,
    H5D_btree_idx_is_space_alloc,
    H5D_btree_idx_insert,
    H5D_btree_idx_get_addr,
    NULL,
    H5D_btree_idx_iterate,
    H5D_btree_idx_remove,
    H5D_btree_idx_delete,
    H5D_btree_idx_copy_setup,
    H5D_btree_idx_copy_shutdown,
    H5D_btree_idx_size,
    H5D_btree_idx_reset,
    NULL,
    NULL,
    H5D_btree_idx_dump,
    H5D_btree_idx_dest
}};


/*****************************/
/* Library Private Variables */
/*****************************/

/* inherits B-tree like properties from H5B */
H5B_class_t H5B_BTREE[1] = {{
    H5B_CHUNK_ID,		/*id			*/
    sizeof(H5D_btree_key_t),	/*sizeof_nkey		*/
    H5D_btree_get_shared,	/*get_shared		*/
    H5D_btree_new_node,		/*new			*/
    H5D_btree_cmp2,		/*cmp2			*/
    H5D_btree_cmp3,		/*cmp3			*/
    H5D_btree_found,		/*found			*/
    H5D_btree_insert,		/*insert		*/
    FALSE,			/*follow min branch?	*/
    FALSE,			/*follow max branch?	*/
    H5B_LEFT,                   /*critical key          */
    H5D_btree_remove,           /*remove		*/
    H5D_btree_decode_key,	/*decode		*/
    H5D_btree_encode_key,	/*encode		*/
    H5D_btree_debug_key,	/*debug			*/
}};


/*******************/
/* Local Variables */
/*******************/


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_get_shared
 *
 * Purpose:	Returns the shared B-tree info for the specified UDATA.
 *
 * Return:	Success:	Pointer to the raw B-tree page for this dataset
 *
 *		Failure:	Can't fail
 *
 * Programmer:	Quincey Koziol
 *		Monday, July  5, 2004
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static H5RC_t *
H5D_btree_get_shared(const H5F_t UNUSED *f, const void *_udata)
{
    const H5D_chunk_common_ud_t *udata = (const H5D_chunk_common_ud_t *) _udata;

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_get_shared)

    HDassert(udata);
    HDassert(udata->storage);
    HDassert(udata->storage->idx_type == H5D_CHUNK_IDX_BTREE);
    HDassert(udata->storage->u.btree.shared);

    /* Return the pointer to the ref-count object */
    FUNC_LEAVE_NOAPI(udata->storage->u.btree.shared)
} /* end H5D_btree_get_shared() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_new_node
 *
 * Purpose:	Adds a new entry to an i-storage B-tree.  We can assume that
 *		the domain represented by UDATA doesn't intersect the domain
 *		already represented by the B-tree.
 *
 * Return:	Success:	Non-negative. The address of leaf is returned
 *				through the ADDR argument.  It is also added
 *				to the UDATA.
 *
 * 		Failure:	Negative
 *
 * Programmer:	Robb Matzke
 *		Tuesday, October 14, 1997
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_new_node(H5F_t *f, hid_t dxpl_id, H5B_ins_t op,
		    void *_lt_key, void *_udata, void *_rt_key,
		    haddr_t *addr_p/*out*/)
{
    H5D_btree_key_t	*lt_key = (H5D_btree_key_t *) _lt_key;
    H5D_btree_key_t	*rt_key = (H5D_btree_key_t *) _rt_key;
    H5D_chunk_ud_t	*udata = (H5D_chunk_ud_t *) _udata;
    unsigned		u;
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_new_node)

    /* check args */
    HDassert(f);
    HDassert(lt_key);
    HDassert(rt_key);
    HDassert(udata);
    HDassert(udata->common.layout->ndims > 0 && udata->common.layout->ndims < H5O_LAYOUT_NDIMS);
    HDassert(addr_p);

    /* Allocate new storage */
    HDassert(udata->nbytes > 0);
    H5_CHECK_OVERFLOW(udata->nbytes, uint32_t, hsize_t);
    if(HADDR_UNDEF == (*addr_p = H5MF_alloc(f, H5FD_MEM_DRAW, dxpl_id, (hsize_t)udata->nbytes)))
        HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "couldn't allocate new file storage")
    udata->addr = *addr_p;

    /*
     * The left key describes the storage of the UDATA chunk being
     * inserted into the tree.
     */
    lt_key->nbytes = udata->nbytes;
    lt_key->filter_mask = udata->filter_mask;
    for(u = 0; u < udata->common.layout->ndims; u++)
        lt_key->offset[u] = udata->common.offset[u];

    /*
     * The right key might already be present.  If not, then add a zero-width
     * chunk.
     */
    if(H5B_INS_LEFT != op) {
        rt_key->nbytes = 0;
        rt_key->filter_mask = 0;
        for(u = 0; u < udata->common.layout->ndims; u++) {
            HDassert(udata->common.offset[u] + udata->common.layout->dim[u] >
                udata->common.offset[u]);
            rt_key->offset[u] = udata->common.offset[u] + udata->common.layout->dim[u];
        } /* end if */
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_new_node() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_cmp2
 *
 * Purpose:	Compares two keys sort of like strcmp().  The UDATA pointer
 *		is only to supply extra information not carried in the keys
 *		(in this case, the dimensionality) and is not compared
 *		against the keys.
 *
 * Return:	Success:	-1 if LT_KEY is less than RT_KEY;
 *				1 if LT_KEY is greater than RT_KEY;
 *				0 if LT_KEY and RT_KEY are equal.
 *
 *		Failure:	FAIL (same as LT_KEY<RT_KEY)
 *
 * Programmer:	Robb Matzke
 *		Thursday, November  6, 1997
 *
 *-------------------------------------------------------------------------
 */
static int
H5D_btree_cmp2(void *_lt_key, void *_udata, void *_rt_key)
{
    H5D_btree_key_t	*lt_key = (H5D_btree_key_t *) _lt_key;
    H5D_btree_key_t	*rt_key = (H5D_btree_key_t *) _rt_key;
    H5D_chunk_common_ud_t	*udata = (H5D_chunk_common_ud_t *) _udata;
    int		ret_value;

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_cmp2)

    HDassert(lt_key);
    HDassert(rt_key);
    HDassert(udata);
    HDassert(udata->layout->ndims > 0 && udata->layout->ndims <= H5O_LAYOUT_NDIMS);

    /* Compare the offsets but ignore the other fields */
    ret_value = H5V_vector_cmp_u(udata->layout->ndims, lt_key->offset, rt_key->offset);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_cmp2() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_cmp3
 *
 * Purpose:	Compare the requested datum UDATA with the left and right
 *		keys of the B-tree.
 *
 * Return:	Success:	negative if the min_corner of UDATA is less
 *				than the min_corner of LT_KEY.
 *
 *				positive if the min_corner of UDATA is
 *				greater than or equal the min_corner of
 *				RT_KEY.
 *
 *				zero otherwise.	 The min_corner of UDATA is
 *				not necessarily contained within the address
 *				space represented by LT_KEY, but a key that
 *				would describe the UDATA min_corner address
 *				would fall lexicographically between LT_KEY
 *				and RT_KEY.
 *
 *		Failure:	FAIL (same as UDATA < LT_KEY)
 *
 * Programmer:	Robb Matzke
 *		Wednesday, October  8, 1997
 *
 *-------------------------------------------------------------------------
 */
static int
H5D_btree_cmp3(void *_lt_key, void *_udata, void *_rt_key)
{
    H5D_btree_key_t	*lt_key = (H5D_btree_key_t *) _lt_key;
    H5D_btree_key_t	*rt_key = (H5D_btree_key_t *) _rt_key;
    H5D_chunk_common_ud_t	*udata = (H5D_chunk_common_ud_t *) _udata;
    int		ret_value = 0;

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_cmp3)

    HDassert(lt_key);
    HDassert(rt_key);
    HDassert(udata);
    HDassert(udata->layout->ndims > 0 && udata->layout->ndims <= H5O_LAYOUT_NDIMS);

    /* Special case for faster checks on 1-D chunks */
    /* (Checking for ndims==2 because last dimension is the datatype size) */
    /* The additional checking for the right key is necessary due to the */
    /* slightly odd way the library initializes the right-most node in the */
    /* indexed storage B-tree... */
    /* (Dump the B-tree with h5debug to look at it) -QAK */
    if(udata->layout->ndims == 2) {
        if(udata->offset[0] > rt_key->offset[0])
            ret_value = 1;
        else if(udata->offset[0] == rt_key->offset[0] &&
                udata->offset[1] >= rt_key->offset[1])
            ret_value = 1;
        else if(udata->offset[0] < lt_key->offset[0])
            ret_value = (-1);
    } /* end if */
    else {
        if(H5V_vector_ge_u(udata->layout->ndims, udata->offset, rt_key->offset))
            ret_value = 1;
        else if(H5V_vector_lt_u(udata->layout->ndims, udata->offset, lt_key->offset))
            ret_value = (-1);
    } /* end else */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_cmp3() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_found
 *
 * Purpose:	This function is called when the B-tree search engine has
 *		found the leaf entry that points to a chunk of storage that
 *		contains the beginning of the logical address space
 *		represented by UDATA.  The LT_KEY is the left key (the one
 *		that describes the chunk) and RT_KEY is the right key (the
 *		one that describes the next or last chunk).
 *
 * Note:	It's possible that the chunk isn't really found.  For
 *		instance, in a sparse dataset the requested chunk might fall
 *		between two stored chunks in which case this function is
 *		called with the maximum stored chunk indices less than the
 *		requested chunk indices.
 *
 * Return:	Non-negative (TRUE/FALSE) on success with information about the
 *              chunk returned through the UDATA argument. Negative on failure.
 *
 * Programmer:	Robb Matzke
 *		Thursday, October  9, 1997
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static htri_t
H5D_btree_found(H5F_t UNUSED *f, hid_t UNUSED dxpl_id, haddr_t addr, const void *_lt_key,
		 void *_udata)
{
    H5D_chunk_ud_t	   *udata = (H5D_chunk_ud_t *) _udata;
    const H5D_btree_key_t *lt_key = (const H5D_btree_key_t *) _lt_key;
    unsigned		u;
    htri_t      ret_value = TRUE;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_found)

    /* Check arguments */
    HDassert(f);
    HDassert(H5F_addr_defined(addr));
    HDassert(udata);
    HDassert(lt_key);

    /* Is this *really* the requested chunk? */
    for(u = 0; u < udata->common.layout->ndims; u++)
        if(udata->common.offset[u] >= lt_key->offset[u] + udata->common.layout->dim[u])
            HGOTO_DONE(FALSE)

    /* Initialize return values */
    HDassert(lt_key->nbytes > 0);
    udata->addr = addr;
    udata->nbytes = lt_key->nbytes;
    udata->filter_mask = lt_key->filter_mask;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_found() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_insert
 *
 * Purpose:	This function is called when the B-tree insert engine finds
 *		the node to use to insert new data.  The UDATA argument
 *		points to a struct that describes the logical addresses being
 *		added to the file.  This function allocates space for the
 *		data and returns information through UDATA describing a
 *		file chunk to receive (part of) the data.
 *
 *		The LT_KEY is always the key describing the chunk of file
 *		memory at address ADDR. On entry, UDATA describes the logical
 *		addresses for which storage is being requested (through the
 *		`offset' and `size' fields). On return, UDATA describes the
 *		logical addresses contained in a chunk on disk.
 *
 * Return:	Success:	An insertion command for the caller, one of
 *				the H5B_INS_* constants.  The address of the
 *				new chunk is returned through the NEW_NODE
 *				argument.
 *
 *		Failure:	H5B_INS_ERROR
 *
 * Programmer:	Robb Matzke
 *		Thursday, October  9, 1997
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static H5B_ins_t
H5D_btree_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key,
		  hbool_t *lt_key_changed,
		  void *_md_key, void *_udata, void *_rt_key,
		  hbool_t UNUSED *rt_key_changed,
		  haddr_t *new_node_p/*out*/)
{
    H5D_btree_key_t	*lt_key = (H5D_btree_key_t *) _lt_key;
    H5D_btree_key_t	*md_key = (H5D_btree_key_t *) _md_key;
    H5D_btree_key_t	*rt_key = (H5D_btree_key_t *) _rt_key;
    H5D_chunk_ud_t	*udata = (H5D_chunk_ud_t *) _udata;
    int		cmp;
    unsigned		u;
    H5B_ins_t		ret_value;

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_insert)

    /* check args */
    HDassert(f);
    HDassert(H5F_addr_defined(addr));
    HDassert(lt_key);
    HDassert(lt_key_changed);
    HDassert(md_key);
    HDassert(udata);
    HDassert(rt_key);
    HDassert(new_node_p);

    cmp = H5D_btree_cmp3(lt_key, udata, rt_key);
    HDassert(cmp <= 0);

    if(cmp < 0) {
        /* Negative indices not supported yet */
        HGOTO_ERROR(H5E_STORAGE, H5E_UNSUPPORTED, H5B_INS_ERROR, "internal error")

    } else if(H5V_vector_eq_u(udata->common.layout->ndims,
				udata->common.offset, lt_key->offset) &&
	       lt_key->nbytes > 0) {
        /*
         * Already exists.  If the new size is not the same as the old size
         * then we should reallocate storage.
         */
        if(lt_key->nbytes != udata->nbytes) {
/* Currently, the old chunk data is "thrown away" after the space is reallocated,
 * so avoid data copy in H5MF_realloc() call by just free'ing the space and
 * allocating new space.
 *
 * This should keep the file smaller also, by freeing the space and then
 * allocating new space, instead of vice versa (in H5MF_realloc).
 *
 * QAK - 11/19/2002
 */
#ifdef OLD_WAY
            if(HADDR_UNDEF == (*new_node_p = H5MF_realloc(f, H5FD_MEM_DRAW, addr,
                      (hsize_t)lt_key->nbytes, (hsize_t)udata->nbytes)))
                HGOTO_ERROR(H5E_STORAGE, H5E_NOSPACE, H5B_INS_ERROR, "unable to reallocate chunk storage")
#else /* OLD_WAY */
            H5_CHECK_OVERFLOW(lt_key->nbytes, uint32_t, hsize_t);
            if(H5MF_xfree(f, H5FD_MEM_DRAW, dxpl_id, addr, (hsize_t)lt_key->nbytes) < 0)
                HGOTO_ERROR(H5E_STORAGE, H5E_CANTFREE, H5B_INS_ERROR, "unable to free chunk")
            H5_CHECK_OVERFLOW(udata->nbytes, uint32_t, hsize_t);
            if(HADDR_UNDEF == (*new_node_p = H5MF_alloc(f, H5FD_MEM_DRAW, dxpl_id, (hsize_t)udata->nbytes)))
                HGOTO_ERROR(H5E_STORAGE, H5E_NOSPACE, H5B_INS_ERROR, "unable to reallocate chunk")
#endif /* OLD_WAY */
            lt_key->nbytes = udata->nbytes;
            lt_key->filter_mask = udata->filter_mask;
            *lt_key_changed = TRUE;
            udata->addr = *new_node_p;
            ret_value = H5B_INS_CHANGE;
        } else {
            udata->addr = addr;
            ret_value = H5B_INS_NOOP;
        }

    } else if (H5V_hyper_disjointp(udata->common.layout->ndims,
				   lt_key->offset, udata->common.layout->dim,
				   udata->common.offset, udata->common.layout->dim)) {
        HDassert(H5V_hyper_disjointp(udata->common.layout->ndims,
				   rt_key->offset, udata->common.layout->dim,
				   udata->common.offset, udata->common.layout->dim));
        /*
         * Split this node, inserting the new new node to the right of the
         * current node.  The MD_KEY is where the split occurs.
         */
        md_key->nbytes = udata->nbytes;
        md_key->filter_mask = udata->filter_mask;
        for(u = 0; u < udata->common.layout->ndims; u++) {
            HDassert(0 == udata->common.offset[u] % udata->common.layout->dim[u]);
            md_key->offset[u] = udata->common.offset[u];
        } /* end for */

        /*
         * Allocate storage for the new chunk
         */
        H5_CHECK_OVERFLOW(udata->nbytes, uint32_t, hsize_t);
        if(HADDR_UNDEF == (*new_node_p = H5MF_alloc(f, H5FD_MEM_DRAW, dxpl_id, (hsize_t)udata->nbytes)))
            HGOTO_ERROR(H5E_STORAGE, H5E_NOSPACE, H5B_INS_ERROR, "file allocation failed")
        udata->addr = *new_node_p;
        ret_value = H5B_INS_RIGHT;

    } else {
        HGOTO_ERROR(H5E_IO, H5E_UNSUPPORTED, H5B_INS_ERROR, "internal error")
    }

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_insert() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_remove
 *
 * Purpose:	Removes chunks that are no longer necessary in the B-tree.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer: Robb Matzke
 *             Pedro Vicente, pvn@ncsa.uiuc.edu
 * 		March 28, 2002
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static H5B_ins_t
H5D_btree_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key /*in,out */ ,
	hbool_t *lt_key_changed /*out */ ,
	void UNUSED * _udata /*in,out */ ,
	void UNUSED * _rt_key /*in,out */ ,
	hbool_t *rt_key_changed /*out */ )
{
    H5D_btree_key_t    *lt_key = (H5D_btree_key_t *)_lt_key;
    H5B_ins_t ret_value=H5B_INS_REMOVE; /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_remove)

    /* Remove raw data chunk from file */
    H5_CHECK_OVERFLOW(lt_key->nbytes, uint32_t, hsize_t);
    if(H5MF_xfree(f, H5FD_MEM_DRAW, dxpl_id, addr, (hsize_t)lt_key->nbytes) < 0)
        HGOTO_ERROR(H5E_STORAGE, H5E_CANTFREE, H5B_INS_ERROR, "unable to free chunk")

    /* Mark keys as unchanged */
    *lt_key_changed = FALSE;
    *rt_key_changed = FALSE;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_remove() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_decode_key
 *
 * Purpose:	Decodes a raw key into a native key for the B-tree
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Friday, October 10, 1997
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_decode_key(const H5B_shared_t *shared, const uint8_t *raw, void *_key)
{
    H5D_btree_key_t	*key = (H5D_btree_key_t *) _key;
    size_t		ndims;
    unsigned		u;

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_decode_key)

    /* check args */
    HDassert(shared);
    HDassert(raw);
    HDassert(key);
    ndims = H5D_BTREE_NDIMS(shared);
    HDassert(ndims <= H5O_LAYOUT_NDIMS);

    /* decode */
    UINT32DECODE(raw, key->nbytes);
    UINT32DECODE(raw, key->filter_mask);
    for(u = 0; u < ndims; u++)
	UINT64DECODE(raw, key->offset[u]);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D_btree_decode_key() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_encode_key
 *
 * Purpose:	Encode a key from native format to raw format.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Friday, October 10, 1997
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_encode_key(const H5B_shared_t *shared, uint8_t *raw, const void *_key)
{
    const H5D_btree_key_t *key = (const H5D_btree_key_t *)_key;
    size_t		ndims;
    unsigned		u;

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_encode_key)

    /* check args */
    HDassert(shared);
    HDassert(raw);
    HDassert(key);
    ndims = H5D_BTREE_NDIMS(shared);
    HDassert(ndims <= H5O_LAYOUT_NDIMS);

    /* encode */
    UINT32ENCODE(raw, key->nbytes);
    UINT32ENCODE(raw, key->filter_mask);
    for(u = 0; u < ndims; u++)
	UINT64ENCODE(raw, key->offset[u]);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D_btree_encode_key() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_debug_key
 *
 * Purpose:	Prints a key.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Thursday, April 16, 1998
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static herr_t
H5D_btree_debug_key(FILE *stream, int indent, int fwidth, const void *_key,
    const void *_udata)
{
    const H5D_btree_key_t	*key = (const H5D_btree_key_t *)_key;
    const H5D_btree_dbg_t	*udata = (const H5D_btree_dbg_t *)_udata;
    unsigned		u;

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_debug_key)

    HDassert(key);

    HDfprintf(stream, "%*s%-*s %u bytes\n", indent, "", fwidth, "Chunk size:", (unsigned)key->nbytes);
    HDfprintf(stream, "%*s%-*s 0x%08x\n", indent, "", fwidth, "Filter mask:", key->filter_mask);
    HDfprintf(stream, "%*s%-*s {", indent, "", fwidth, "Logical offset:");
    for(u = 0; u < udata->ndims; u++)
        HDfprintf(stream, "%s%Hd", u?", ":"", key->offset[u]);
    HDfputs("}\n", stream);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D_btree_debug_key() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_shared_create
 *
 * Purpose:	Create & initialize B-tree shared info
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Monday, September 27, 2004
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_shared_create(const H5F_t *f, H5O_storage_chunk_t *store, unsigned ndims)
{
    H5B_shared_t *shared;               /* Shared B-tree node info */
    size_t	sizeof_rkey;	        /* Size of raw (disk) key	     */
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_shared_create)

    /* Set the raw key size */
    sizeof_rkey = 4 +			/*storage size		*/
                4 +			/*filter mask		*/
                ndims * 8;		/*dimension indices	*/

    /* Allocate & initialize global info for the shared structure */
    if(NULL == (shared = H5B_shared_new(f, H5B_BTREE, sizeof_rkey)))
	HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed for shared B-tree info")

    /* Set up the "local" information for this dataset's chunks */
        /* <none> */

    /* Make shared B-tree info reference counted */
    if(NULL == (store->u.btree.shared = H5RC_create(shared, H5B_shared_free)))
	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create ref-count wrapper for shared B-tree info")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_shared_create() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_init
 *
 * Purpose:	Initialize the indexing information for a dataset.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Monday, May 18, 1998
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_init(const H5D_chk_idx_info_t *idx_info, const H5S_t UNUSED *space,
    haddr_t UNUSED dset_ohdr_addr)
{
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_idx_init)

    /* Check args */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(H5F_addr_defined(dset_ohdr_addr));

    /* Allocate the shared structure */
    if(H5D_btree_shared_create(idx_info->f, idx_info->storage, idx_info->layout->ndims) < 0)
	HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't create wrapper for shared B-tree info")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_idx_init() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_create
 *
 * Purpose:	Creates a new indexed-storage B-tree and initializes the
 *		layout struct with information about the storage.  The
 *		struct should be immediately written to the object header.
 *
 *		This function must be called before passing LAYOUT to any of
 *		the other indexed storage functions!
 *
 * Return:	Non-negative on success (with the LAYOUT argument initialized
 *		and ready to write to an object header). Negative on failure.
 *
 * Programmer:	Robb Matzke
 *		Tuesday, October 21, 1997
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_create(const H5D_chk_idx_info_t *idx_info)
{
    H5D_chunk_common_ud_t udata;             /* User data for B-tree callback */
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_idx_create)

    /* Check args */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(!H5F_addr_defined(idx_info->storage->idx_addr));

    /* Initialize "user" data for B-tree callbacks, etc. */
    udata.layout = idx_info->layout;
    udata.storage = idx_info->storage;

    /* Create the v1 B-tree for the chunk index */
    if(H5B_create(idx_info->f, idx_info->dxpl_id, H5B_BTREE, &udata, &(idx_info->storage->idx_addr)/*out*/) < 0)
	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't create B-tree")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_idx_create() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_is_space_alloc
 *
 * Purpose:	Query if space is allocated for index method
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		Thursday, January 15, 2009
 *
 *-------------------------------------------------------------------------
 */
static hbool_t
H5D_btree_idx_is_space_alloc(const H5O_storage_chunk_t *storage)
{
    hbool_t ret_value;          /* Return value */

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_idx_is_space_alloc)

    /* Check args */
    HDassert(storage);

    /* Set return value */
    ret_value = (hbool_t)H5F_addr_defined(storage->idx_addr);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_idx_is_space_alloc() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_insert
 *
 * Purpose:	Create the chunk it if it doesn't exist, or reallocate the
 *              chunk if its size changed.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Thursday, May 21, 1998
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_insert(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata)
{
    herr_t	ret_value = SUCCEED;		/* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_idx_insert)

    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(H5F_addr_defined(idx_info->storage->idx_addr));
    HDassert(udata);

    /*
     * Create the chunk it if it doesn't exist, or reallocate the chunk if
     * its size changed.
     */
    if(H5B_insert(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
        HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to allocate chunk")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5D_btree_idx_insert() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_get_addr
 *
 * Purpose:	Get the file address of a chunk if file space has been
 *		assigned.  Save the retrieved information in the udata
 *		supplied.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Albert Cheng
 *              June 27, 1998
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata)
{
    herr_t	ret_value = SUCCEED;	/* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_idx_get_addr)

    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->layout->ndims > 0);
    HDassert(idx_info->storage);
    HDassert(H5F_addr_defined(idx_info->storage->idx_addr));
    HDassert(udata);

    /* Go get the chunk information from the B-tree */
    if(H5B_find(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk info")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5D_btree_idx_get_addr() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_iterate_cb
 *
 * Purpose:	Translate the B-tree specific chunk record into a generic
 *              form and make the callback to the generic chunk callback
 *              routine.
 *
 * Return:	Success:	Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, May 20, 2008
 *
 *-------------------------------------------------------------------------
 */
/* ARGSUSED */
static int
H5D_btree_idx_iterate_cb(H5F_t UNUSED *f, hid_t UNUSED dxpl_id,
    const void *_lt_key, haddr_t addr, const void UNUSED *_rt_key,
    void *_udata)
{
    H5D_btree_it_ud_t	*udata = (H5D_btree_it_ud_t *)_udata; /* User data */
    const H5D_btree_key_t	*lt_key = (const H5D_btree_key_t *)_lt_key; /* B-tree key for chunk */
    H5D_chunk_rec_t chunk_rec;  /* Generic chunk record for callback */
    int ret_value;              /* Return value */

    FUNC_ENTER_NOAPI_NOINIT_NOERR(H5D_btree_idx_iterate_cb)

    /* Sanity check for memcpy() */
    HDcompile_assert(offsetof(H5D_chunk_rec_t, nbytes) == offsetof(H5D_btree_key_t, nbytes));
    HDcompile_assert(sizeof(chunk_rec.nbytes) == sizeof(lt_key->nbytes));
    HDcompile_assert(offsetof(H5D_chunk_rec_t, offset) == offsetof(H5D_btree_key_t, offset));
    HDcompile_assert(sizeof(chunk_rec.offset) == sizeof(lt_key->offset));
    HDcompile_assert(offsetof(H5D_chunk_rec_t, filter_mask) == offsetof(H5D_btree_key_t, filter_mask));
    HDcompile_assert(sizeof(chunk_rec.filter_mask) == sizeof(lt_key->filter_mask));

    /* Compose generic chunk record for callback */
    HDmemcpy(&chunk_rec, lt_key, sizeof(*lt_key));
    chunk_rec.chunk_addr = addr;

    /* Make "generic chunk" callback */
    if((ret_value = (udata->cb)(&chunk_rec, udata->udata)) < 0)
        HERROR(H5E_DATASET, H5E_CALLBACK, "failure in generic chunk iterator callback");

    FUNC_LEAVE_NOAPI(ret_value)
} /* H5D_btree_idx_iterate_cb() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_iterate
 *
 * Purpose:	Iterate over the chunks in an index, making a callback
 *              for each one.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, May 20, 2008
 *
 *-------------------------------------------------------------------------
 */
static int
H5D_btree_idx_iterate(const H5D_chk_idx_info_t *idx_info,
    H5D_chunk_cb_func_t chunk_cb, void *chunk_udata)
{
    H5D_btree_it_ud_t	udata;  /* User data for B-tree iterator callback */
    int ret_value;              /* Return value */

    FUNC_ENTER_NOAPI_NOINIT_NOERR(H5D_btree_idx_iterate)

    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(H5F_addr_defined(idx_info->storage->idx_addr));
    HDassert(chunk_cb);
    HDassert(chunk_udata);

    /* Initialize userdata */
    HDmemset(&udata, 0, sizeof udata);
    udata.common.layout = idx_info->layout;
    udata.common.storage = idx_info->storage;
    udata.cb = chunk_cb;
    udata.udata = chunk_udata;

    /* Iterate over existing chunks */
    if((ret_value = H5B_iterate(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, H5D_btree_idx_iterate_cb, &udata)) < 0)
        HERROR(H5E_DATASET, H5E_BADITER, "unable to iterate over chunk B-tree");

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_idx_iterate() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_remove
 *
 * Purpose:	Remove chunk from index.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Thursday, May 22, 2008
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t *udata)
{
    herr_t	ret_value = SUCCEED;		/* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_idx_remove)

    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(H5F_addr_defined(idx_info->storage->idx_addr));
    HDassert(udata);

    /* Remove the chunk from the v1 B-tree index and release the space for the
     * chunk (in the B-tree callback).
     */
    if(H5B_remove(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
        HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, FAIL, "unable to remove chunk entry")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5D_btree_idx_remove() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_delete
 *
 * Purpose:	Delete index and raw data storage for entire dataset
 *              (i.e. all chunks)
 *
 * Return:	Success:	Non-negative
 *		Failure:	negative
 *
 * Programmer:	Quincey Koziol
 *              Thursday, March 20, 2003
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_delete(const H5D_chk_idx_info_t *idx_info)
{
    herr_t ret_value = SUCCEED;     /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_idx_delete)

    /* Sanity checks */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);

    /* Check if the index data structure has been allocated */
    if(H5F_addr_defined(idx_info->storage->idx_addr)) {
        H5O_storage_chunk_t tmp_storage;  /* Local copy of storage info */
        H5D_chunk_common_ud_t udata;            /* User data for B-tree operations */

        /* Set up temporary chunked storage info */
        tmp_storage = *idx_info->storage;

        /* Set up the shared structure */
        if(H5D_btree_shared_create(idx_info->f, &tmp_storage, idx_info->layout->ndims) < 0)
            HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't create wrapper for shared B-tree info")

        /* Set up B-tree user data */
        HDmemset(&udata, 0, sizeof udata);
        udata.layout = idx_info->layout;
        udata.storage = &tmp_storage;

        /* Delete entire B-tree */
        if(H5B_delete(idx_info->f, idx_info->dxpl_id, H5B_BTREE, tmp_storage.idx_addr, &udata) < 0)
            HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, FAIL, "unable to delete chunk B-tree")

        /* Release the shared B-tree page */
        if(NULL == tmp_storage.u.btree.shared)
            HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "ref-counted page nil")
        if(H5RC_DEC(tmp_storage.u.btree.shared) < 0)
            HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to decrement ref-counted page")
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_idx_delete() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_copy_setup
 *
 * Purpose:	Set up any necessary information for copying chunks
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Thursday, May 29, 2008
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
    const H5D_chk_idx_info_t *idx_info_dst)
{
    herr_t      ret_value = SUCCEED;        /* Return value */

    FUNC_ENTER_NOAPI_NOINIT_TAG(H5D_btree_idx_copy_setup, idx_info_dst->dxpl_id, H5AC__COPIED_TAG, FAIL)

    HDassert(idx_info_src);
    HDassert(idx_info_src->f);
    HDassert(idx_info_src->pline);
    HDassert(idx_info_src->layout);
    HDassert(idx_info_src->storage);
    HDassert(idx_info_dst);
    HDassert(idx_info_dst->f);
    HDassert(idx_info_dst->pline);
    HDassert(idx_info_dst->layout);
    HDassert(idx_info_dst->storage);
    HDassert(!H5F_addr_defined(idx_info_dst->storage->idx_addr));

    /* Create shared B-tree info for each file */
    if(H5D_btree_shared_create(idx_info_src->f, idx_info_src->storage, idx_info_src->layout->ndims) < 0)
        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't create wrapper for source shared B-tree info")
    if(H5D_btree_shared_create(idx_info_dst->f, idx_info_dst->storage, idx_info_dst->layout->ndims) < 0)
        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't create wrapper for destination shared B-tree info")

    /* Create the root of the B-tree that describes chunked storage in the dest. file */
    if(H5D_btree_idx_create(idx_info_dst) < 0)
        HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to initialize chunked storage")
    HDassert(H5F_addr_defined(idx_info_dst->storage->idx_addr));

done:
    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
} /* end H5D_btree_idx_copy_setup() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_copy_shutdown
 *
 * Purpose:	Shutdown any information from copying chunks
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Thursday, May 29, 2008
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
    H5O_storage_chunk_t *storage_dst,
    hid_t UNUSED dxpl_id)
{
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_idx_copy_shutdown)

    HDassert(storage_src);
    HDassert(storage_dst);

    /* Decrement refcount on shared B-tree info */
    if(H5RC_DEC(storage_src->u.btree.shared) < 0)
        HGOTO_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "unable to decrement ref-counted page")
    if(H5RC_DEC(storage_dst->u.btree.shared) < 0)
        HGOTO_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "unable to decrement ref-counted page")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_idx_copy_shutdown() */


/*-------------------------------------------------------------------------
 * Function:    H5D_btree_idx_size
 *
 * Purpose:     Retrieve the amount of index storage for chunked dataset
 *
 * Return:      Success:        Non-negative
 *              Failure:        negative
 *
 * Programmer:  Vailin Choi
 *              June 8, 2007
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_size(const H5D_chk_idx_info_t *idx_info, hsize_t *index_size)
{
    H5D_chunk_common_ud_t udata;              /* User-data for loading B-tree nodes */
    H5B_info_t bt_info;                 /* B-tree info */
    hbool_t shared_init = FALSE;        /* Whether shared B-tree info is initialized */
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI(H5D_btree_idx_size, FAIL)

    /* Check args */
    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);
    HDassert(index_size);

    /* Initialize the shared info for the B-tree traversal */
    if(H5D_btree_shared_create(idx_info->f, idx_info->storage, idx_info->layout->ndims) < 0)
        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't create wrapper for shared B-tree info")
    shared_init = TRUE;

    /* Initialize B-tree node user-data */
    HDmemset(&udata, 0, sizeof udata);
    udata.layout = idx_info->layout;
    udata.storage = idx_info->storage;

    /* Get metadata information for B-tree */
    if(H5B_get_info(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, &bt_info, NULL, &udata) < 0)
        HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to iterate over chunk B-tree")

    /* Set the size of the B-tree */
    *index_size = bt_info.size;

done:
    if(shared_init) {
        if(NULL == idx_info->storage->u.btree.shared)
            HDONE_ERROR(H5E_IO, H5E_CANTFREE, FAIL, "ref-counted page nil")
        if(H5RC_DEC(idx_info->storage->u.btree.shared) < 0)
            HDONE_ERROR(H5E_IO, H5E_CANTFREE, FAIL, "unable to decrement ref-counted page")
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_idx_size() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_reset
 *
 * Purpose:	Reset indexing information.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Thursday, January 15, 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_idx_reset)

    HDassert(storage);

    /* Reset index info */
    if(reset_addr)
	storage->idx_addr = HADDR_UNDEF;
    storage->u.btree.shared = NULL;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D_btree_idx_reset() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_dump
 *
 * Purpose:	Dump indexing information to a stream.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Thursday, January 15, 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_dump(const H5O_storage_chunk_t *storage, FILE *stream)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_btree_idx_dump)

    HDassert(storage);
    HDassert(stream);

    HDfprintf(stream, "    Address: %a\n", storage->idx_addr);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5D_btree_idx_dump() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_idx_dest
 *
 * Purpose:	Release indexing information in memory.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Thursday, May 21, 1998
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5D_btree_idx_dest(const H5D_chk_idx_info_t *idx_info)
{
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5D_btree_idx_dest)

    HDassert(idx_info);
    HDassert(idx_info->f);
    HDassert(idx_info->pline);
    HDassert(idx_info->layout);
    HDassert(idx_info->storage);

    /* Free the raw B-tree node buffer */
    if(NULL == idx_info->storage->u.btree.shared)
        HGOTO_ERROR(H5E_IO, H5E_CANTFREE, FAIL, "ref-counted page nil")
    if(H5RC_DEC(idx_info->storage->u.btree.shared) < 0)
	HGOTO_ERROR(H5E_IO, H5E_CANTFREE, FAIL, "unable to decrement ref-counted page")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_idx_dest() */


/*-------------------------------------------------------------------------
 * Function:	H5D_btree_debug
 *
 * Purpose:	Debugs a B-tree node for indexed raw data storage.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Thursday, April 16, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5D_btree_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent,
		 int fwidth, unsigned ndims)
{
    H5D_btree_dbg_t     udata;          /* User data for B-tree callback */
    H5O_storage_chunk_t storage;        /* Storage information for B-tree callback */
    hbool_t     shared_init = FALSE;    /* Whether B-tree shared info is initialized */
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI(H5D_btree_debug, FAIL)

    /* Reset "fake" storage info */
    HDmemset(&storage, 0, sizeof(storage));
    storage.idx_type = H5D_CHUNK_IDX_BTREE;

    /* Allocate the shared structure */
    if(H5D_btree_shared_create(f, &storage, ndims) < 0)
	HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't create wrapper for shared B-tree info")
    shared_init = TRUE;

    /* Set up user data for callback */
    udata.common.layout = NULL;
    udata.common.storage = &storage;
    udata.common.offset = NULL;
    udata.ndims = ndims;

    /* Dump the records for the B-tree */
    (void)H5B_debug(f, dxpl_id, addr, stream, indent, fwidth, H5B_BTREE, &udata);

done:
    if(shared_init) {
        /* Free the raw B-tree node buffer */
        if(NULL == storage.u.btree.shared)
            HDONE_ERROR(H5E_IO, H5E_CANTFREE, FAIL, "ref-counted page nil")
        else
            if(H5RC_DEC(storage.u.btree.shared) < 0)
                HDONE_ERROR(H5E_IO, H5E_CANTFREE, FAIL, "unable to decrement ref-counted page")
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5D_btree_debug() */