summaryrefslogtreecommitdiffstats
path: root/src/H5Gstab.c
blob: 6203fd0255be0d394cdf947427391abe1c7f7d99 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/* Programmer: Robb Matzke
 *	       Friday, September 19, 1997
 *
 */

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

#include "H5Gmodule.h" /* This source code file is part of the H5G module */

/***********/
/* Headers */
/***********/
#include "H5private.h"   /* Generic Functions			*/
#include "H5Eprivate.h"  /* Error handling		  	*/
#include "H5Fprivate.h"  /* File access				*/
#include "H5Gpkg.h"      /* Groups		  		*/
#include "H5HLprivate.h" /* Local Heaps				*/
#include "H5MMprivate.h" /* Memory management			*/

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

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

/* User data for finding link information from B-tree */
typedef struct {
    /* downward */
    const char *name; /* Name to search for */
    H5HL_t *    heap; /* Local heap for group */

    /* upward */
    H5O_link_t *lnk; /* Caller's link location */
} H5G_stab_fnd_ud_t;

/* Data passed through B-tree iteration for looking up a name by index */
typedef struct H5G_bt_it_gnbi_t {
    /* downward */
    H5G_bt_it_idx_common_t common; /* Common information for "by index" lookup  */
    H5HL_t *               heap;   /*symbol table heap 			     */

    /* upward */
    char *name; /*member name to be returned                 */
} H5G_bt_it_gnbi_t;

#ifndef H5_NO_DEPRECATED_SYMBOLS
/* Data passed through B-tree iteration for looking up a type by index */
typedef struct H5G_bt_it_gtbi_t {
    /* downward */
    H5G_bt_it_idx_common_t common; /* Common information for "by index" lookup  */
    H5F_t *                f;      /* Pointer to file that symbol table is in */

    /* upward */
    H5G_obj_t type; /*member type to be returned                 */
} H5G_bt_it_gtbi_t;
#endif /* H5_NO_DEPRECATED_SYMBOLS */

/* Data passed through B-tree iteration for looking up a link by index */
typedef struct H5G_bt_it_lbi_t {
    /* downward */
    H5G_bt_it_idx_common_t common; /* Common information for "by index" lookup  */
    H5HL_t *               heap;   /*symbol table heap 			     */

    /* upward */
    H5O_link_t *lnk;   /*link to be returned                        */
    hbool_t     found; /*whether we found the link                  */
} H5G_bt_it_lbi_t;

/********************/
/* Package Typedefs */
/********************/

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

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

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

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

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_create_components
 *
 * Purpose:	Creates the components for a new, empty, symbol table (name heap
 *		and B-tree).  The caller can specify an initial size for the
 *		name heap.
 *
 *		In order for the B-tree to operate correctly, the first
 *		item in the heap is the empty string, and must appear at
 *		heap offset zero.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		Nov  7 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_create_components(H5F_t *f, H5O_stab_t *stab, size_t size_hint)
{
    H5HL_t *heap = NULL;         /* Pointer to local heap */
    size_t  name_offset;         /* Offset of "" name */
    herr_t  ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    /*
     * Check arguments.
     */
    HDassert(f);
    HDassert(stab);
    HDassert(size_hint > 0);

    /* Create the B-tree */
    if (H5B_create(f, H5B_SNODE, NULL, &(stab->btree_addr) /*out*/) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create B-tree")

    /* Create symbol table private heap */
    if (H5HL_create(f, size_hint, &(stab->heap_addr) /*out*/) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create heap")

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(f, stab->heap_addr, H5AC__NO_FLAGS_SET)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Insert name into the heap */
    if (UFAIL == (name_offset = H5HL_insert(f, heap, (size_t)1, "")))
        HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "can't insert name into heap")

    /*
     * B-tree's won't work if the first name isn't at the beginning
     * of the heap.
     */
    HDassert(0 == name_offset);

done:
    /* Release resources */
    if (heap && FAIL == H5HL_unprotect(heap))
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_create_components() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_create
 *
 * Purpose:	Creates a new empty symbol table (object header, name heap,
 *		and B-tree).  The caller can specify an initial size for the
 *		name heap.  The object header of the group is opened for
 *		write access.
 *
 *		In order for the B-tree to operate correctly, the first
 *		item in the heap is the empty string, and must appear at
 *		heap offset zero.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Aug  1 1997
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_create(H5O_loc_t *grp_oloc, const H5O_ginfo_t *ginfo, H5O_stab_t *stab)
{
    size_t heap_hint;           /* Local heap size hint */
    size_t size_hint;           /* Local heap size hint */
    herr_t ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)

    /*
     * Check arguments.
     */
    HDassert(grp_oloc);
    HDassert(stab);

    /* Adjust the size hint, if necessary */
    if (ginfo->lheap_size_hint == 0)
        heap_hint =
            8 + /* "null" name inserted for B-tree */
            (ginfo->est_num_entries *
             H5HL_ALIGN(ginfo->est_name_len +
                        1)) + /* estimated size of names for links, aligned for inserting into local heap */
            H5HL_SIZEOF_FREE(grp_oloc->file); /* Free list entry in local heap */
    else
        heap_hint = ginfo->lheap_size_hint;
    size_hint = MAX(heap_hint, H5HL_SIZEOF_FREE(grp_oloc->file) + 2);

    /* Go create the B-tree & local heap */
    if (H5G__stab_create_components(grp_oloc->file, stab, size_hint) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create symbol table components")

    /*
     * Insert the symbol table message into the object header and the symbol
     * table entry.
     */
    if (H5O_msg_create(grp_oloc, H5O_STAB_ID, 0, H5O_UPDATE_TIME, stab) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")

done:
    FUNC_LEAVE_NOAPI_TAG(ret_value)
} /* end H5G__stab_create() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_insert_real
 *
 * Purpose:	Insert a new symbol into a table.
 *		The name of the new symbol is NAME and its symbol
 *		table entry is OBJ_LNK.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		Nov  7 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_insert_real(H5F_t *f, const H5O_stab_t *stab, const char *name, H5O_link_t *obj_lnk,
                      H5O_type_t obj_type, const void *crt_info)
{
    H5HL_t *     heap = NULL;         /* Pointer to local heap */
    H5G_bt_ins_t udata;               /* Data to pass through B-tree	*/
    herr_t       ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    /* check arguments */
    HDassert(f);
    HDassert(stab);
    HDassert(name && *name);
    HDassert(obj_lnk);

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(f, stab->heap_addr, H5AC__NO_FLAGS_SET)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Initialize data to pass through B-tree */
    udata.common.name = name;
    udata.common.heap = heap;
    udata.lnk         = obj_lnk;
    udata.obj_type    = obj_type;
    udata.crt_info    = crt_info;

    /* Insert into symbol table */
    if (H5B_insert(f, H5B_SNODE, stab->btree_addr, &udata) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert entry")

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_insert_real() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_insert
 *
 * Purpose:	Insert a new symbol into the table described by GRP_ENT in
 *		file F.	 The name of the new symbol is NAME and its symbol
 *		table entry is OBJ_ENT.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Aug  1 1997
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk, H5O_type_t obj_type,
                 const void *crt_info)
{
    H5O_stab_t stab;                /* Symbol table message		*/
    herr_t     ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)

    /* check arguments */
    HDassert(grp_oloc && grp_oloc->file);
    HDassert(name && *name);
    HDassert(obj_lnk);

    /* Retrieve symbol table message */
    if (NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "not a symbol table")

    if (H5G__stab_insert_real(grp_oloc->file, &stab, name, obj_lnk, obj_type, crt_info) < 0)
        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5_ITER_ERROR, "unable to insert the name")

done:
    FUNC_LEAVE_NOAPI_TAG(ret_value)
} /* end H5G__stab_insert() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_remove
 *
 * Purpose:	Remove NAME from a symbol table.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Thursday, September 17, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_remove(const H5O_loc_t *loc, H5RS_str_t *grp_full_path_r, const char *name)
{
    H5HL_t *    heap = NULL;         /* Pointer to local heap */
    H5O_stab_t  stab;                /*symbol table message		*/
    H5G_bt_rm_t udata;               /*data to pass through B-tree	*/
    herr_t      ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    HDassert(loc && loc->file);
    HDassert(name && *name);

    /* Read in symbol table message */
    if (NULL == H5O_msg_read(loc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "not a symbol table")

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(loc->file, stab.heap_addr, H5AC__NO_FLAGS_SET)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Initialize data to pass through B-tree */
    udata.common.name     = name;
    udata.common.heap     = heap;
    udata.grp_full_path_r = grp_full_path_r;

    /* Remove from symbol table */
    if (H5B_remove(loc->file, H5B_SNODE, stab.btree_addr, &udata) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to remove entry")

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_remove() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_remove_by_idx
 *
 * Purpose:	Remove NAME from a symbol table, according to the name index.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Wednesday, November 15, 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_remove_by_idx(const H5O_loc_t *grp_oloc, H5RS_str_t *grp_full_path_r, H5_iter_order_t order,
                        hsize_t n)
{
    H5HL_t *    heap = NULL;          /* Pointer to local heap */
    H5O_stab_t  stab;                 /* Symbol table message		*/
    H5G_bt_rm_t udata;                /* Data to pass through B-tree	*/
    H5O_link_t  obj_lnk;              /* Object's link within group */
    hbool_t     lnk_copied = FALSE;   /* Whether the link was copied */
    herr_t      ret_value  = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    HDassert(grp_oloc && grp_oloc->file);

    /* Look up name of link to remove, by index */
    if (H5G__stab_lookup_by_idx(grp_oloc, order, n, &obj_lnk) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get link information")
    lnk_copied = TRUE;

    /* Read in symbol table message */
    if (NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "not a symbol table")

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__NO_FLAGS_SET)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Initialize data to pass through B-tree */
    udata.common.name     = obj_lnk.name;
    udata.common.heap     = heap;
    udata.grp_full_path_r = grp_full_path_r;

    /* Remove link from symbol table */
    if (H5B_remove(grp_oloc->file, H5B_SNODE, stab.btree_addr, &udata) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to remove entry")

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    /* Reset the link information, if we have a copy */
    if (lnk_copied)
        H5O_msg_reset(H5O_LINK_ID, &obj_lnk);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_remove_by_idx() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_delete
 *
 * Purpose:	Delete entire symbol table information from file
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Thursday, March 20, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_delete(H5F_t *f, const H5O_stab_t *stab)
{
    H5HL_t *    heap = NULL;         /* Pointer to local heap */
    H5G_bt_rm_t udata;               /*data to pass through B-tree	*/
    herr_t      ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    HDassert(f);
    HDassert(stab);
    HDassert(H5F_addr_defined(stab->btree_addr));
    HDassert(H5F_addr_defined(stab->heap_addr));

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(f, stab->heap_addr, H5AC__NO_FLAGS_SET)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Set up user data for B-tree deletion */
    udata.common.name = NULL;
    udata.common.heap = heap;

    /* Delete entire B-tree */
    if (H5B_delete(f, H5B_SNODE, stab->btree_addr, &udata) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete symbol table B-tree")

    /* Release resources */
    if (H5HL_unprotect(heap) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")
    heap = NULL;

    /* Delete local heap for names */
    if (H5HL_delete(f, stab->heap_addr) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete symbol table heap")

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_delete() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_iterate
 *
 * Purpose:	Iterate over the objects in a group
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Monday, October  3, 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_iterate(const H5O_loc_t *oloc, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
                  H5G_lib_iterate_t op, void *op_data)
{
    H5HL_t *         heap = NULL;           /* Local heap for group */
    H5O_stab_t       stab;                  /* Info about symbol table */
    H5G_link_table_t ltable    = {0, NULL}; /* Link table */
    herr_t           ret_value = FAIL;      /* Return value */

    FUNC_ENTER_PACKAGE_TAG(oloc->addr)

    /* Sanity check */
    HDassert(oloc);
    HDassert(op);

    /* Get the B-tree info */
    if (NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to determine local heap address")

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Check on iteration order */
    /* ("native" iteration order is increasing for this link storage mechanism) */
    if (order != H5_ITER_DEC) {
        H5G_bt_it_it_t udata; /* User data to pass to B-tree callback */

        /* Build udata to pass through H5B_iterate() to H5G__node_iterate() */
        udata.heap      = heap;
        udata.skip      = skip;
        udata.final_ent = last_lnk;
        udata.op        = op;
        udata.op_data   = op_data;

        /* Iterate over the group members */
        if ((ret_value = H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_iterate, &udata)) < 0)
            HERROR(H5E_SYM, H5E_CANTNEXT, "iteration operator failed");

        /* Check for too high of a starting index (ex post facto :-) */
        /* (Skipping exactly as many entries as are in the group is currently an error) */
        if (skip > 0 && skip >= *last_lnk)
            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index specified")
    } /* end if */
    else {
        H5G_bt_it_bt_t udata; /* User data to pass to B-tree callback */

        /* Build udata to pass through H5B_iterate() to H5G__node_build_table() */
        udata.alloc_nlinks = 0;
        udata.heap         = heap;
        udata.ltable       = &ltable;

        /* Iterate over the group members */
        if (H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_build_table, &udata) < 0)
            HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to build link table")

        /* Check for skipping out of bounds */
        if (skip > 0 && (size_t)skip >= ltable.nlinks)
            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "index out of bound")

        /* Sort link table in correct iteration order */
        if (H5G__link_sort_table(&ltable, H5_INDEX_NAME, order) < 0)
            HGOTO_ERROR(H5E_SYM, H5E_CANTSORT, FAIL, "error sorting link messages")

        /* Iterate over links in table */
        if ((ret_value = H5G__link_iterate_table(&ltable, skip, last_lnk, op, op_data)) < 0)
            HERROR(H5E_SYM, H5E_CANTNEXT, "iteration operator failed");
    } /* end else */

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")
    if (ltable.lnks && H5G__link_release_table(&ltable) < 0)
        HDONE_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to release link table")

    FUNC_LEAVE_NOAPI_TAG(ret_value)
} /* end H5G__stab_iterate() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_count
 *
 * Purpose:	Count the # of links in a group
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, September  6, 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_count(const H5O_loc_t *oloc, hsize_t *num_objs)
{
    H5O_stab_t stab; /* Info about symbol table */
    herr_t     ret_value = SUCCEED;

    FUNC_ENTER_PACKAGE_TAG(oloc->addr)

    /* Sanity check */
    HDassert(oloc);
    HDassert(num_objs);

    /* Reset the number of objects in the group */
    *num_objs = 0;

    /* Get the B-tree info */
    if (NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to determine local heap address")

    /* Iterate over the group members */
    if (H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_sumup, num_objs) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "iteration operator failed")

done:
    FUNC_LEAVE_NOAPI_TAG(ret_value)
} /* end H5G__stab_count() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_bh_size
 *
 * Purpose:	Retrieve storage for btree and heap (1.6)
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Vailin Choi
 *		June 25 2007
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_bh_size(H5F_t *f, const H5O_stab_t *stab, H5_ih_info_t *bh_info)
{
    hsize_t    snode_size; /* Symbol table node size */
    H5B_info_t bt_info;    /* B-tree node info */
    herr_t     ret_value = SUCCEED;

    FUNC_ENTER_PACKAGE

    /* Sanity check */
    HDassert(f);
    HDassert(stab);
    HDassert(bh_info);

    /* Set up user data for B-tree iteration */
    snode_size = 0;

    /* Get the B-tree & symbol table node size info */
    if (H5B_get_info(f, H5B_SNODE, stab->btree_addr, &bt_info, H5G__node_iterate_size, &snode_size) < 0)
        HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "iteration operator failed")

    /* Add symbol table & B-tree node sizes to index info */
    bh_info->index_size += snode_size + bt_info.size;

    /* Get the size of the local heap for the group */
    if (H5HL_heapsize(f, stab->heap_addr, &(bh_info->heap_size)) < 0)
        HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "iteration operator failed")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_bh_size() */

/*-------------------------------------------------------------------------
 * Function:	H5G_stab_get_name_by_idx_cb
 *
 * Purpose:     Callback for B-tree iteration 'by index' info query to
 *              retrieve the name of a link
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *	        Nov  7, 2006
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5G_stab_get_name_by_idx_cb(const H5G_entry_t *ent, void *_udata)
{
    H5G_bt_it_gnbi_t *udata = (H5G_bt_it_gnbi_t *)_udata;
    size_t            name_off;            /* Offset of name in heap */
    const char *      name;                /* Pointer to name string in heap */
    herr_t            ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity check */
    HDassert(ent);
    HDassert(udata && udata->heap);

    /* Get name offset in heap */
    name_off = ent->name_off;

    if ((name = (const char *)H5HL_offset_into(udata->heap, name_off)) == NULL)
        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get symbol table link name")

    if ((udata->name = H5MM_strdup(name)) == NULL)
        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to duplicate symbol table link name")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_stab_get_name_by_idx_cb */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_get_name_by_idx
 *
 * Purpose:     Returns the name of objects in the group by giving index.
 *
 * Return:	Success:        Non-negative, length of name
 *		Failure:	Negative
 *
 * Programmer:	Raymond Lu
 *	        Nov 20, 2002
 *
 *-------------------------------------------------------------------------
 */
ssize_t
H5G__stab_get_name_by_idx(const H5O_loc_t *oloc, H5_iter_order_t order, hsize_t n, char *name, size_t size)
{
    H5HL_t *         heap = NULL;         /* Pointer to local heap */
    H5O_stab_t       stab;                /* Info about local heap & B-tree */
    H5G_bt_it_gnbi_t udata;               /* Iteration information */
    hbool_t          udata_valid = FALSE; /* Whether iteration information is valid */
    ssize_t          ret_value   = -1;    /* Return value */

    /* Portably clear udata struct (before FUNC_ENTER) */
    HDmemset(&udata, 0, sizeof(udata));

    FUNC_ENTER_NOAPI(FAIL)

    /* Sanity check */
    HDassert(oloc);

    /* Get the B-tree & local heap info */
    if (NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to determine local heap address")

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Remap index for decreasing iteration order */
    if (order == H5_ITER_DEC) {
        hsize_t nlinks = 0; /* Number of links in group */

        /* Iterate over the symbol table nodes, to count the links */
        if (H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_sumup, &nlinks) < 0)
            HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "iteration operator failed")

        /* Map decreasing iteration order index to increasing iteration order index */
        n = nlinks - (n + 1);
    } /* end if */

    /* Set iteration information */
    udata.common.idx      = n;
    udata.common.num_objs = 0;
    udata.common.op       = H5G_stab_get_name_by_idx_cb;
    udata.heap            = heap;
    udata.name            = NULL;
    udata_valid           = TRUE;

    /* Iterate over the group members */
    if (H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "iteration operator failed")

    /* If we don't know the name now, we almost certainly went out of bounds */
    if (udata.name == NULL)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "index out of bound")

    /* Get the length of the name */
    ret_value = (ssize_t)HDstrlen(udata.name);

    /* Copy the name into the user's buffer, if given */
    if (name) {
        HDstrncpy(name, udata.name, MIN((size_t)(ret_value + 1), size));
        if ((size_t)ret_value >= size)
            name[size - 1] = '\0';
    } /* end if */

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    /* Free the duplicated name */
    if (udata_valid && udata.name != NULL)
        H5MM_xfree(udata.name);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_get_name_by_idx() */

/*-------------------------------------------------------------------------
 * Function:	H5G_stab_lookup_cb
 *
 * Purpose:     B-tree 'find' callback to retrieve location for an object
 *
 * Return:	Success:        Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *	        Sep 20, 2005
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5G_stab_lookup_cb(const H5G_entry_t *ent, void *_udata)
{
    H5G_stab_fnd_ud_t *udata     = (H5G_stab_fnd_ud_t *)_udata; /* 'User data' passed in */
    herr_t             ret_value = SUCCEED;                     /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Check for setting link info */
    if (udata->lnk)
        /* Convert the entry to a link */
        if (H5G__ent_to_link(udata->lnk, udata->heap, ent, udata->name) < 0)
            HGOTO_ERROR(H5E_SYM, H5E_CANTCONVERT, FAIL, "unable to convert symbol table entry to link")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_stab_lookup_cb() */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_lookup
 *
 * Purpose:	Look up an object relative to a group, using symbol table
 *
 * Return:	Non-negative (TRUE/FALSE) on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		Sep 20 2005
 *
 *-------------------------------------------------------------------------
 */
htri_t
H5G__stab_lookup(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *lnk)
{
    H5HL_t *          heap = NULL;      /* Pointer to local heap */
    H5G_bt_lkp_t      bt_udata;         /* Data to pass through B-tree	*/
    H5G_stab_fnd_ud_t udata;            /* 'User data' to give to callback */
    H5O_stab_t        stab;             /* Symbol table message		*/
    htri_t            ret_value = FAIL; /* Return value */

    FUNC_ENTER_PACKAGE

    /* check arguments */
    HDassert(grp_oloc && grp_oloc->file);
    HDassert(name && *name);
    HDassert(lnk);

    /* Retrieve the symbol table message for the group */
    if (NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't read message")

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Set up user data to pass to 'find' operation callback */
    udata.name = name;
    udata.lnk  = lnk;
    udata.heap = heap;

    /* Set up the user data for actual B-tree find operation */
    bt_udata.common.name = name;
    bt_udata.common.heap = heap;
    bt_udata.op          = H5G_stab_lookup_cb;
    bt_udata.op_data     = &udata;

    /* Search the B-tree */
    if ((ret_value = H5B_find(grp_oloc->file, H5B_SNODE, stab.btree_addr, &bt_udata)) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "not found")

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_lookup() */

/*-------------------------------------------------------------------------
 * Function:	H5G_stab_lookup_by_idx_cb
 *
 * Purpose:     Callback for B-tree iteration 'by index' info query to
 *              retrieve the link
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *	        Nov  9, 2006
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5G_stab_lookup_by_idx_cb(const H5G_entry_t *ent, void *_udata)
{
    H5G_bt_it_lbi_t *udata = (H5G_bt_it_lbi_t *)_udata;
    const char *     name;                /* Pointer to name string in heap */
    herr_t           ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity check */
    HDassert(ent);
    HDassert(udata && udata->heap);

    /* Get a pointer to the link name */
    if ((name = (const char *)H5HL_offset_into(udata->heap, ent->name_off)) == NULL)
        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get symbol table link name")

    /* Convert the entry to a link */
    if (H5G__ent_to_link(udata->lnk, udata->heap, ent, name) < 0)
        HGOTO_ERROR(H5E_SYM, H5E_CANTCONVERT, FAIL, "unable to convert symbol table entry to link")
    udata->found = TRUE;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_stab_lookup_by_idx_cb */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_lookup_by_idx
 *
 * Purpose:	Look up an object in a group, according to the name index
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		Nov  7 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_iter_order_t order, hsize_t n, H5O_link_t *lnk)
{
    H5HL_t *        heap = NULL;         /* Pointer to local heap */
    H5G_bt_it_lbi_t udata;               /* Iteration information */
    H5O_stab_t      stab;                /* Symbol table message */
    herr_t          ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    /* check arguments */
    HDassert(grp_oloc && grp_oloc->file);
    HDassert(lnk);

    /* Get the B-tree & local heap info */
    if (NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to determine local heap address")

    /* Pin the heap down in memory */
    if (NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
        HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")

    /* Remap index for decreasing iteration order */
    if (order == H5_ITER_DEC) {
        hsize_t nlinks = 0; /* Number of links in group */

        /* Iterate over the symbol table nodes, to count the links */
        if (H5B_iterate(grp_oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_sumup, &nlinks) < 0)
            HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "iteration operator failed")

        /* Map decreasing iteration order index to increasing iteration order index */
        n = nlinks - (n + 1);
    } /* end if */

    /* Set iteration information */
    udata.common.idx      = n;
    udata.common.num_objs = 0;
    udata.common.op       = H5G_stab_lookup_by_idx_cb;
    udata.heap            = heap;
    udata.lnk             = lnk;
    udata.found           = FALSE;

    /* Iterate over the group members */
    if (H5B_iterate(grp_oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "iteration operator failed")

    /* If we didn't find the link, we almost certainly went out of bounds */
    if (!udata.found)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "index out of bound")

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G__stab_lookup_by_idx() */

#ifndef H5_STRICT_FORMAT_CHECKS

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_valid
 *
 * Purpose:	Verify that a group's symbol table message is valid.  If
 *              provided, the addresses in alt_stab will be tried if the
 *              addresses in the group's stab message are invalid, and
 *              the stab message will be updated if necessary.
 *
 *              NOTE: This function is only called when strict format
 *              checks are disabled.  This is so that, when strict
 *              format checks are enabled,  errors in the symbol table
 *              messages are not fixed by this function and are instead
 *              reported by the library.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Neil Fortner
 *		Mar 17, 2009
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5G__stab_valid(H5O_loc_t *grp_oloc, H5O_stab_t *alt_stab)
{
    H5O_stab_t stab;                /* Current symbol table */
    H5HL_t *   heap      = NULL;    /* Pointer to local heap */
    hbool_t    changed   = FALSE;   /* Whether stab has been modified */
    herr_t     ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)

    /* Read the symbol table message */
    if (NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "unable to read symbol table message");

    /* Check if the symbol table message's b-tree address is valid */
    if (H5B_valid(grp_oloc->file, H5B_SNODE, stab.btree_addr) < 0) {
        /* Address is invalid, try the b-tree address in the alternate symbol
         * table message */
        if (!alt_stab || H5B_valid(grp_oloc->file, H5B_SNODE, alt_stab->btree_addr) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "unable to locate b-tree")
        else {
            /* The alternate symbol table's b-tree address is valid.  Adjust the
             * symbol table message in the group. */
            stab.btree_addr = alt_stab->btree_addr;
            changed         = TRUE;
        } /* end else */
    }     /* end if */

    /* Check if the symbol table message's heap address is valid */
    if (NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG))) {
        /* Address is invalid, try the heap address in the alternate symbol
         * table message */
        if (!alt_stab ||
            NULL == (heap = H5HL_protect(grp_oloc->file, alt_stab->heap_addr, H5AC__READ_ONLY_FLAG)))
            HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "unable to locate heap")
        else {
            /* The alternate symbol table's heap address is valid.  Adjust the
             * symbol table message in the group. */
            stab.heap_addr = alt_stab->heap_addr;
            changed        = TRUE;
        } /* end else */
    }     /* end if */

    /* Update the symbol table message and clear errors if necessary */
    if (changed) {
        H5E_clear_stack(NULL);
        if (H5O_msg_write(grp_oloc, H5O_STAB_ID, 0, H5O_UPDATE_TIME | H5O_UPDATE_FORCE, &stab) < 0)
            HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to correct symbol table message")
    } /* end if */

done:
    /* Release resources */
    if (heap && H5HL_unprotect(heap) < 0)
        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")

    FUNC_LEAVE_NOAPI_TAG(ret_value)
} /* end H5G__stab_valid */
#endif /* H5_STRICT_FORMAT_CHECKS */

#ifndef H5_NO_DEPRECATED_SYMBOLS

/*-------------------------------------------------------------------------
 * Function:	H5G_stab_get_type_by_idx_cb
 *
 * Purpose:     Callback for B-tree iteration 'by index' info query to
 *              retrieve the type of an object
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *	        Nov  7, 2006
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5G_stab_get_type_by_idx_cb(const H5G_entry_t *ent, void *_udata)
{
    H5G_bt_it_gtbi_t *udata     = (H5G_bt_it_gtbi_t *)_udata;
    herr_t            ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_NOAPI_NOINIT

    /* Sanity check */
    HDassert(ent);
    HDassert(udata);

    /* Check for a soft link */
    switch (ent->type) {
        case H5G_CACHED_SLINK:
            udata->type = H5G_LINK;
            break;

        case H5G_CACHED_ERROR:
        case H5G_NOTHING_CACHED:
        case H5G_CACHED_STAB:
        case H5G_NCACHED:
        default: {
            H5O_loc_t  tmp_oloc; /* Temporary object location */
            H5O_type_t obj_type; /* Type of object at location */

            /* Build temporary object location */
            tmp_oloc.file = udata->f;
            HDassert(H5F_addr_defined(ent->header));
            tmp_oloc.addr = ent->header;

            /* Get the type of the object */
            if (H5O_obj_type(&tmp_oloc, &obj_type) < 0)
                HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object type")
            udata->type = H5G_map_obj_type(obj_type);
        } break;
    } /* end switch */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_stab_get_type_by_idx_cb */

/*-------------------------------------------------------------------------
 * Function:	H5G__stab_get_type_by_idx
 *
 * Purpose:     Private function for H5Gget_objtype_by_idx.
 *              Returns the type of objects in the group by giving index.
 *
 * Return:	Success:        H5G_GROUP(1), H5G_DATASET(2), H5G_TYPE(3)
 *
 *		Failure:	UNKNOWN
 *
 * Programmer:	Raymond Lu
 *	        Nov 20, 2002
 *
 *-------------------------------------------------------------------------
 */
H5G_obj_t
H5G__stab_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx)
{
    H5O_stab_t       stab;                    /* Info about local heap & B-tree */
    H5G_bt_it_gtbi_t udata;                   /* User data for B-tree callback */
    H5G_obj_t        ret_value = H5G_UNKNOWN; /* Return value */

    FUNC_ENTER_PACKAGE_TAG(oloc->addr)

    /* Sanity check */
    HDassert(oloc);

    /* Get the B-tree & local heap info */
    if (NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab))
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5G_UNKNOWN, "unable to determine local heap address")

    /* Set iteration information */
    udata.common.idx      = idx;
    udata.common.num_objs = 0;
    udata.common.op       = H5G_stab_get_type_by_idx_cb;
    udata.f               = oloc->file;
    udata.type            = H5G_UNKNOWN;

    /* Iterate over the group members */
    if (H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5G_UNKNOWN, "iteration operator failed")

    /* If we don't know the type now, we almost certainly went out of bounds */
    if (udata.type == H5G_UNKNOWN)
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5G_UNKNOWN, "index out of bound")

    /* Set the return value */
    ret_value = udata.type;

done:
    FUNC_LEAVE_NOAPI_TAG(ret_value)
} /* end H5G__stab_get_type_by_idx() */
#endif /* H5_NO_DEPRECATED_SYMBOLS */