summaryrefslogtreecommitdiffstats
path: root/src/H5Aint.c
blob: 2915502a20049e7ae617ea3395a9851b9899df50 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:		H5Aint.c
 *			Dec 18 2006
 *			Quincey Koziol <koziol@hdfgroup.org>
 *
 * Purpose:		Internal routines for managing attributes.
 *
 *-------------------------------------------------------------------------
 */

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

#define H5A_PACKAGE		/*suppress error about including H5Apkg  */
#define H5O_PACKAGE		/*suppress error about including H5Opkg	  */


/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions			*/
#include "H5Apkg.h"		/* Attributes	  			*/
#include "H5Dprivate.h"		/* Datasets				*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5Iprivate.h"		/* IDs			  		*/
#include "H5MMprivate.h"	/* Memory management			*/
#include "H5Opkg.h"             /* Object headers			*/
#include "H5SMprivate.h"	/* Shared Object Header Messages	*/


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


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

/* Data exchange structure to use when building table of compact attributes for an object */
typedef struct {
    H5F_t       *f;             /* Pointer to file that fractal heap is in */
    hid_t       dxpl_id;        /* DXPL for operation                */
    H5A_attr_table_t *atable;   /* Pointer to attribute table to build */
    size_t curr_attr;           /* Current attribute to operate on */
    hbool_t bogus_crt_idx;      /* Whether bogus creation index values need to be set */
} H5A_compact_bt_ud_t;

/* Data exchange structure to use when building table of dense attributes for an object */
typedef struct {
    H5A_attr_table_t *atable;   /* Pointer to attribute table to build */
    size_t curr_attr;           /* Current attribute to operate on */
} H5A_dense_bt_ud_t;

/* Data exchange structure to use when copying an attribute from _SRC to _DST */
typedef struct {
    const H5O_ainfo_t *ainfo;   /* dense information    */
    H5F_t *file;                /* file                 */
    hbool_t *recompute_size;    /* Flag to indicate if size changed */
    H5O_copy_t *cpy_info;       /* Information on copying options   */
    hid_t dxpl_id;              /* DXPL for operation               */
    const H5O_loc_t *oloc_src;
    H5O_loc_t *oloc_dst;
} H5A_dense_file_cp_ud_t;


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


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

static herr_t H5A_compact_build_table_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
    unsigned sequence, unsigned *oh_flags_ptr, void *_udata/*in,out*/);
static herr_t H5A_dense_build_table_cb(const H5A_t *attr, void *_udata);
static int H5A_attr_cmp_name_inc(const void *attr1, const void *attr2);
static int H5A_attr_cmp_name_dec(const void *attr1, const void *attr2);
static int H5A_attr_cmp_corder_inc(const void *attr1, const void *attr2);
static int H5A_attr_cmp_corder_dec(const void *attr1, const void *attr2);
static herr_t H5A_attr_sort_table(H5A_attr_table_t *atable, H5_index_t idx_type,
    H5_iter_order_t order);

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


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


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

typedef H5A_t*	H5A_t_ptr;
H5FL_SEQ_DEFINE(H5A_t_ptr);


/*-------------------------------------------------------------------------
 * Function:	H5A_compact_build_table_cb
 *
 * Purpose:	Object header iterator callback routine to copy attribute
 *              into table.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Dec 18 2006
 *
 * Modification:Raymond Lu
 *              24 June 2008
 *              Changed the table of attribute objects to be the table of
 *              pointers to attribute objects for the ease of operation.
 *-------------------------------------------------------------------------
 */
static herr_t
H5A_compact_build_table_cb(H5O_t UNUSED *oh, H5O_mesg_t *mesg/*in,out*/,
    unsigned sequence, hbool_t UNUSED *oh_modified, void *_udata/*in,out*/)
{
    H5A_compact_bt_ud_t *udata = (H5A_compact_bt_ud_t *)_udata;   /* Operator user data */
    herr_t ret_value = H5_ITER_CONT;    /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_compact_build_table_cb)

    /* check args */
    HDassert(mesg);

    /* Re-allocate the table if necessary */
    if(udata->curr_attr == udata->atable->nattrs) {
        H5A_t **new_table;          /* New table for attributes */
        size_t new_table_size;      /* Number of attributes in new table */

        /* Allocate larger table */
        new_table_size = MAX(1, 2 * udata->atable->nattrs);
        if(NULL == (new_table = (H5A_t **)H5FL_SEQ_REALLOC(H5A_t_ptr, udata->atable->attrs, new_table_size)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "unable to extend attribute table")

        /* Update table information in user data */
        udata->atable->attrs = new_table;
        udata->atable->nattrs = new_table_size;
    } /* end if */

    /* Copy attribute into table */
    if(NULL == (udata->atable->attrs[udata->curr_attr] = H5A_copy(NULL, (const H5A_t *)mesg->native)))
        HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")

    /* Assign [somewhat arbitrary] creation order value, if requested */
    if(udata->bogus_crt_idx)
        ((udata->atable->attrs[udata->curr_attr])->shared)->crt_idx = sequence;

    /* Increment current attribute */
    udata->curr_attr++;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_compact_build_table_cb() */


/*-------------------------------------------------------------------------
 * Function:	H5A_compact_build_table
 *
 * Purpose:     Builds a table containing a sorted list of attributes for
 *              an object
 *
 * Note:	Used for building table of attributes in non-native iteration
 *              order for an index
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *	        Dec 18, 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5A_compact_build_table(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_index_t idx_type,
    H5_iter_order_t order, H5A_attr_table_t *atable)
{
    H5A_compact_bt_ud_t udata;                  /* User data for iteration callback */
    H5O_mesg_operator_t op;             /* Wrapper for operator */
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_compact_build_table)

    /* Sanity check */
    HDassert(f);
    HDassert(oh);
    HDassert(atable);

    /* Initialize table */
    atable->attrs = NULL;
    atable->nattrs = 0;

    /* Set up user data for iteration */
    udata.f = f;
    udata.dxpl_id = dxpl_id;
    udata.atable = atable;
    udata.curr_attr = 0;
    udata.bogus_crt_idx = (hbool_t)((oh->version == H5O_VERSION_1 ||
            !(oh->flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED)) ? TRUE : FALSE);

    /* Iterate over existing attributes, checking for attribute with same name */
    op.op_type = H5O_MESG_OP_LIB;
    op.u.lib_op = H5A_compact_build_table_cb;
    if(H5O_msg_iterate_real(f, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
        HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error building attribute table")

    /* Correct # of attributes in table */
    atable->nattrs = udata.curr_attr;

    /* Sort attribute table in correct iteration order */
    if(H5A_attr_sort_table(atable, idx_type, order) < 0)
        HGOTO_ERROR(H5E_ATTR, H5E_CANTSORT, FAIL, "error sorting attribute table")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_compact_build_table() */


/*-------------------------------------------------------------------------
 * Function:	H5A_dense_build_table_cb
 *
 * Purpose:	Callback routine for building table of attributes from dense
 *              attribute storage.
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Dec 11 2006
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A_dense_build_table_cb(const H5A_t *attr, void *_udata)
{
    H5A_dense_bt_ud_t *udata = (H5A_dense_bt_ud_t *)_udata;     /* 'User data' passed in */
    herr_t ret_value = H5_ITER_CONT;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_dense_build_table_cb)

    /* check arguments */
    HDassert(attr);
    HDassert(udata);
    HDassert(udata->curr_attr < udata->atable->nattrs);

    /* Copy attribute information.  Share the attribute object in copying. */
    if(NULL == H5A_copy(udata->atable->attrs[udata->curr_attr], attr))
        HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")

    /* Increment number of attributes stored */
    udata->curr_attr++;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_dense_build_table_cb() */


/*-------------------------------------------------------------------------
 * Function:	H5A_dense_build_table
 *
 * Purpose:     Builds a table containing a sorted list of attributes for
 *              an object
 *
 * Note:	Used for building table of attributes in non-native iteration
 *              order for an index.  Uses the "name" index to retrieve records,
 *		but the 'idx_type' index for sorting them.
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *	        Dec 11, 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5A_dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
    H5_index_t idx_type, H5_iter_order_t order, H5A_attr_table_t *atable)
{
    H5B2_t *bt2_name = NULL;            /* v2 B-tree handle for name index */
    hsize_t nrec;                       /* # of records in v2 B-tree */
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_dense_build_table)

    /* Sanity check */
    HDassert(f);
    HDassert(ainfo);
    HDassert(H5F_addr_defined(ainfo->fheap_addr));
    HDassert(H5F_addr_defined(ainfo->name_bt2_addr));
    HDassert(atable);

    /* Open the name index v2 B-tree */
    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")

    /* Retrieve # of records in "name" B-tree */
    /* (should be same # of records in all indices) */
    if(H5B2_get_nrec(bt2_name, &nrec) < 0)
        HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve # of records in index")

    /* Set size of table */
    H5_CHECK_OVERFLOW(nrec, /* From: */ hsize_t, /* To: */ size_t);
    atable->nattrs = (size_t)nrec;

    /* Allocate space for the table entries */
    if(atable->nattrs > 0) {
        H5A_dense_bt_ud_t udata;       /* User data for iteration callback */
        H5A_attr_iter_op_t attr_op;    /* Attribute operator */
        unsigned i;

        /* Allocate the table to store the attributes */
        if((atable->attrs = (H5A_t **)H5FL_SEQ_MALLOC(H5A_t_ptr, atable->nattrs)) == NULL)
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")

        /* Allocate pointers for each entry in the table */
        for(i=0; i<atable->nattrs; i++)
            if((atable->attrs[i] = (H5A_t *)H5FL_CALLOC(H5A_t)) == NULL)
                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")

        /* Set up user data for iteration */
        udata.atable = atable;
        udata.curr_attr = 0;

        /* Build iterator operator */
        attr_op.op_type = H5A_ATTR_OP_LIB;
        attr_op.u.lib_op = H5A_dense_build_table_cb;

        /* Iterate over the links in the group, building a table of the link messages */
        if(H5A_dense_iterate(f, dxpl_id, (hid_t)0, ainfo, H5_INDEX_NAME,
                H5_ITER_NATIVE, (hsize_t)0, NULL, &attr_op, &udata) < 0)
            HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "error building attribute table")

        /* Sort attribute table in correct iteration order */
        if(H5A_attr_sort_table(atable, idx_type, order) < 0)
            HGOTO_ERROR(H5E_ATTR, H5E_CANTSORT, FAIL, "error sorting attribute table")
    } /* end if */
    else
        atable->attrs = NULL;

done:
    /* Release resources */
    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
        HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_dense_build_table() */


/*-------------------------------------------------------------------------
 * Function:	H5A_attr_cmp_name_inc
 *
 * Purpose:	Callback routine for comparing two attribute names, in
 *              increasing alphabetic order
 *
 * Return:	An integer less than, equal to, or greater than zero if the
 *              first argument is considered to be respectively less than,
 *              equal to, or greater than the second.  If two members compare
 *              as equal, their order in the sorted array is undefined.
 *              (i.e. same as strcmp())
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Dec 11 2006
 *
 *-------------------------------------------------------------------------
 */
static int
H5A_attr_cmp_name_inc(const void *attr1, const void *attr2)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_attr_cmp_name_inc)

    FUNC_LEAVE_NOAPI(HDstrcmp((*(const H5A_t * const *)attr1)->shared->name,
            (*(const H5A_t * const *)attr2)->shared->name))
} /* end H5A_attr_cmp_name_inc() */


/*-------------------------------------------------------------------------
 * Function:	H5A_attr_cmp_name_dec
 *
 * Purpose:	Callback routine for comparing two attribute names, in
 *              decreasing alphabetic order
 *
 * Return:	An integer less than, equal to, or greater than zero if the
 *              second argument is considered to be respectively less than,
 *              equal to, or greater than the first.  If two members compare
 *              as equal, their order in the sorted array is undefined.
 *              (i.e. opposite of strcmp())
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Feb  8 2007
 *
 *-------------------------------------------------------------------------
 */
static int
H5A_attr_cmp_name_dec(const void *attr1, const void *attr2)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_attr_cmp_name_dec)

    FUNC_LEAVE_NOAPI(HDstrcmp((*(const H5A_t * const *)attr2)->shared->name,
            (*(const H5A_t * const *)attr1)->shared->name))
} /* end H5A_attr_cmp_name_dec() */


/*-------------------------------------------------------------------------
 * Function:	H5A_attr_cmp_corder_inc
 *
 * Purpose:	Callback routine for comparing two attributes, in
 *              increasing creation order
 *
 * Return:	An integer less than, equal to, or greater than zero if the
 *              first argument is considered to be respectively less than,
 *              equal to, or greater than the second.  If two members compare
 *              as equal, their order in the sorted array is undefined.
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Feb  8 2007
 *
 *-------------------------------------------------------------------------
 */
static int
H5A_attr_cmp_corder_inc(const void *attr1, const void *attr2)
{
    int ret_value;              /* Return value */

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_attr_cmp_corder_inc)

    if((*(const H5A_t * const *)attr1)->shared->crt_idx < (*(const H5A_t * const *)attr2)->shared->crt_idx)
        ret_value = -1;
    else if((*(const H5A_t * const *)attr1)->shared->crt_idx > (*(const H5A_t * const *)attr2)->shared->crt_idx)
        ret_value = 1;
    else
        ret_value = 0;

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_attr_cmp_corder_inc() */


/*-------------------------------------------------------------------------
 * Function:	H5A_attr_cmp_corder_dec
 *
 * Purpose:	Callback routine for comparing two attributes, in
 *              decreasing creation order
 *
 * Return:	An integer less than, equal to, or greater than zero if the
 *              second argument is considered to be respectively less than,
 *              equal to, or greater than the first.  If two members compare
 *              as equal, their order in the sorted array is undefined.
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Feb  8 2007
 *
 *-------------------------------------------------------------------------
 */
static int
H5A_attr_cmp_corder_dec(const void *attr1, const void *attr2)
{
    int ret_value;              /* Return value */

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_attr_cmp_corder_dec)

    if((*(const H5A_t * const *)attr1)->shared->crt_idx < (*(const H5A_t * const *)attr2)->shared->crt_idx)
        ret_value = 1;
    else if((*(const H5A_t * const *)attr1)->shared->crt_idx > (*(const H5A_t * const *)attr2)->shared->crt_idx)
        ret_value = -1;
    else
        ret_value = 0;

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_attr_cmp_corder_dec() */


/*-------------------------------------------------------------------------
 * Function:	H5A_attr_sort_table
 *
 * Purpose:     Sort table containing a list of attributes for an object
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *	        Dec 11, 2006
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A_attr_sort_table(H5A_attr_table_t *atable, H5_index_t idx_type,
    H5_iter_order_t order)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_attr_sort_table)

    /* Sanity check */
    HDassert(atable);

    /* Pick appropriate comparison routine */
    if(idx_type == H5_INDEX_NAME) {
        if(order == H5_ITER_INC)
            HDqsort(atable->attrs, atable->nattrs, sizeof(H5A_t*), H5A_attr_cmp_name_inc);
        else if(order == H5_ITER_DEC)
            HDqsort(atable->attrs, atable->nattrs, sizeof(H5A_t*), H5A_attr_cmp_name_dec);
        else
            HDassert(order == H5_ITER_NATIVE);
    } /* end if */
    else {
        HDassert(idx_type == H5_INDEX_CRT_ORDER);
        if(order == H5_ITER_INC)
            HDqsort(atable->attrs, atable->nattrs, sizeof(H5A_t*), H5A_attr_cmp_corder_inc);
        else if(order == H5_ITER_DEC)
            HDqsort(atable->attrs, atable->nattrs, sizeof(H5A_t*), H5A_attr_cmp_corder_dec);
        else
            HDassert(order == H5_ITER_NATIVE);
    } /* end else */

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5A_attr_sort_table() */


/*-------------------------------------------------------------------------
 * Function:	H5A_attr_iterate_table
 *
 * Purpose:     Iterate over table containing a list of attributes for an object,
 *              making appropriate callbacks
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *	        Dec 18, 2006
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5A_attr_iterate_table(const H5A_attr_table_t *atable, hsize_t skip,
    hsize_t *last_attr, hid_t loc_id, const H5A_attr_iter_op_t *attr_op,
    void *op_data)
{
    size_t u;                           /* Local index variable */
    herr_t ret_value = H5_ITER_CONT;   /* Return value */

    FUNC_ENTER_NOAPI(H5A_attr_iterate_table, FAIL)

    /* Sanity check */
    HDassert(atable);
    HDassert(attr_op);

    /* Skip over attributes, if requested */
    if(last_attr)
        *last_attr = skip;

    /* Iterate over attribute messages */
    H5_ASSIGN_OVERFLOW(/* To: */ u, /* From: */ skip, /* From: */ hsize_t, /* To: */ size_t)
    for(; u < atable->nattrs && !ret_value; u++) {
        /* Check which type of callback to make */
        switch(attr_op->op_type) {
            case H5A_ATTR_OP_APP2:
            {
                H5A_info_t ainfo;               /* Info for attribute */

                /* Get the attribute information */
                if(H5A_get_info(atable->attrs[u], &ainfo) < 0)
                    HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, H5_ITER_ERROR, "unable to get attribute info")

                /* Make the application callback */
                ret_value = (attr_op->u.app_op2)(loc_id, ((atable->attrs[u])->shared)->name, &ainfo, op_data);
                break;
            }

#ifndef H5_NO_DEPRECATED_SYMBOLS
            case H5A_ATTR_OP_APP:
                /* Make the application callback */
                ret_value = (attr_op->u.app_op)(loc_id, ((atable->attrs[u])->shared)->name, op_data);
                break;
#endif /* H5_NO_DEPRECATED_SYMBOLS */

            case H5A_ATTR_OP_LIB:
                /* Call the library's callback */
                ret_value = (attr_op->u.lib_op)((atable->attrs[u]), op_data);
                break;

            default:
                HDassert("unknown attribute op type" && 0);
#ifdef NDEBUG
                HGOTO_ERROR(H5E_ATTR, H5E_UNSUPPORTED, FAIL, "unsupported attribute op type")
#endif /* NDEBUG */
        } /* end switch */

        /* Increment the number of entries passed through */
        if(last_attr)
            (*last_attr)++;
    } /* end for */

    /* Check for callback failure and pass along return value */
    if(ret_value < 0)
        HERROR(H5E_ATTR, H5E_CANTNEXT, "iteration operator failed");

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_attr_iterate_table() */


/*-------------------------------------------------------------------------
 * Function:	  H5A_attr_release_table
 *
 * Purpose:       Release table containing a list of attributes for an object
 *
 * Return:	  Success:        Non-negative
 *		  Failure:	Negative
 *
 * Programmer:	  Quincey Koziol
 *	          Dec 11, 2006
 *
 * Modification:  Raymond Lu
 *                4 June 2008
 *                Changed from H5A_free to H5A_close to release attributes.
 *-------------------------------------------------------------------------
 */
herr_t
H5A_attr_release_table(H5A_attr_table_t *atable)
{
    size_t      u;               /* Local index variable */
    herr_t	ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_attr_release_table)

    /* Sanity check */
    HDassert(atable);

    /* Release attribute info, if any. */
    if(atable->nattrs > 0) {
        /* Free attribute message information */
        for(u = 0; u < atable->nattrs; u++) {
            if(H5A_close((atable->attrs[u])) < 0)
                HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute")
        }
    } /* end if */
    else
        HDassert(atable->attrs == NULL);

    atable->attrs = (H5A_t **)H5FL_SEQ_FREE(H5A_t_ptr, atable->attrs);

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_attr_release_table() */


/*-------------------------------------------------------------------------
 * Function:    H5A_get_ainfo
 *
 * Purpose:     Retrieves the "attribute info" message for an object.  Also
 *              sets the number of attributes correctly, if it isn't set up yet.
 *
 * Return:	Success:	TRUE/FALSE whether message was found & retrieved
 *              Failure:        FAIL if error occurred
 *
 * Programmer:  Quincey Koziol
 *              koziol@hdfgroup.org
 *              Mar 11 2007
 *
 *-------------------------------------------------------------------------
 */
htri_t
H5A_get_ainfo(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_ainfo_t *ainfo)
{
    H5B2_t *bt2_name = NULL;            /* v2 B-tree handle for name index */
    htri_t ret_value;   /* Return value */

    FUNC_ENTER_NOAPI(H5A_get_ainfo, FAIL)

    /* check arguments */
    HDassert(f);
    HDassert(oh);
    HDassert(ainfo);

    /* Check if the "attribute info" message exists */
    if((ret_value = H5O_msg_exists_oh(oh, H5O_AINFO_ID)) < 0)
	HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "unable to check object header")
    if(ret_value > 0) {
        /* Retrieve the "attribute info" structure */
        if(NULL == H5O_msg_read_oh(f, dxpl_id, oh, H5O_AINFO_ID, ainfo))
	    HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't read AINFO message")

        /* Check if we don't know how many attributes there are */
        if(ainfo->nattrs == HSIZET_MAX) {
            /* Check if we are using "dense" attribute storage */
            if(H5F_addr_defined(ainfo->fheap_addr)) {
                /* Open the name index v2 B-tree */
                if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
                    HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")

                /* Retrieve # of records in "name" B-tree */
                /* (should be same # of records in all indices) */
                if(H5B2_get_nrec(bt2_name, &ainfo->nattrs) < 0)
                    HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve # of records in index")
            } /* end if */
            else
                /* Retrieve # of attributes from object header */
                ainfo->nattrs = oh->attr_msgs_seen;
        } /* end if */
    } /* end if */

done:
    /* Release resources */
    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
        HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_get_ainfo() */


/*-------------------------------------------------------------------------
 * Function:    H5A_set_version
 *
 * Purpose:     Sets the correct version to encode attribute with.
 *              Chooses the oldest version possible, unless the "use the
 *              latest format" flag is set.
 *
 * Return:	Success:        Non-negative
 *		Failure:	Negative
 *
 * Programmer:  Quincey Koziol
 *              koziol@hdfgroup.org
 *              Jul 17 2007
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5A_set_version(const H5F_t *f, H5A_t *attr)
{
    hbool_t type_shared, space_shared;  /* Flags to indicate that shared messages are used for this attribute */
    hbool_t use_latest_format;          /* Flag indicating the newest file format should be used */

    FUNC_ENTER_NOAPI_NOFUNC(H5A_set_version)

    /* check arguments */
    HDassert(f);
    HDassert(attr);

    /* Get the file's 'use the latest version of the format' flag */
    use_latest_format = H5F_USE_LATEST_FORMAT(f);

    /* Check whether datatype and dataspace are shared */
    if(H5O_msg_is_shared(H5O_DTYPE_ID, attr->shared->dt) > 0)
        type_shared = TRUE;
    else
        type_shared = FALSE;

    if(H5O_msg_is_shared(H5O_SDSPACE_ID, attr->shared->ds) > 0)
        space_shared = TRUE;
    else
        space_shared = FALSE;

    /* Check which version to encode attribute with */
    if(use_latest_format)
        attr->shared->version = H5O_ATTR_VERSION_LATEST;      /* Write out latest version of format */
    else if(attr->shared->encoding != H5T_CSET_ASCII)
        attr->shared->version = H5O_ATTR_VERSION_3;   /* Write version which includes the character encoding */
    else if(type_shared || space_shared)
        attr->shared->version = H5O_ATTR_VERSION_2;   /* Write out version with flag for indicating shared datatype or dataspace */
    else
        attr->shared->version = H5O_ATTR_VERSION_1;   /* Write out basic version */

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5A_set_version() */


/*-------------------------------------------------------------------------
 * Function:    H5A_attr_copy_file
 *
 * Purpose:     Copies a message from _MESG to _DEST in file
 *
 * Return:      Success:        Ptr to _DEST
 *
 *              Failure:        NULL
 *
 * Programmer:  Quincey Koziol
 *              November 1, 2005
 *
 *-------------------------------------------------------------------------
 */
H5A_t *
H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_size,
    H5O_copy_t *cpy_info, hid_t dxpl_id)
{
    H5A_t        *attr_dst = NULL;

    /* for dataype conversion */
    hid_t       tid_src = -1;           /* Datatype ID for source datatype */
    hid_t       tid_dst = -1;           /* Datatype ID for destination datatype */
    hid_t       tid_mem = -1;           /* Datatype ID for memory datatype */
    void       *buf = NULL;             /* Buffer for copying data */
    void       *reclaim_buf = NULL;     /* Buffer for reclaiming data */
    hid_t       buf_sid = -1;           /* ID for buffer dataspace */

    H5A_t       *ret_value;             /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_attr_copy_file)

    /* check args */
    HDassert(attr_src);
    HDassert(file_dst);
    HDassert(cpy_info);
    HDassert(!cpy_info->copy_without_attr);

    /* Allocate space for the destination message */
    if(NULL == (attr_dst = H5FL_CALLOC(H5A_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    /* Copy the top level of the attribute */
    *attr_dst = *attr_src;

    if(NULL == (attr_dst->shared = H5FL_CALLOC(H5A_shared_t)))
        HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, NULL, "can't allocate shared attr structure")

    /* Don't have an opened group location for copy */
    H5O_loc_reset(&(attr_dst->oloc));
    H5G_name_reset(&(attr_dst->path));
    attr_dst->obj_opened = FALSE;

    /* Reference count for the header message in the cache */
    attr_dst->shared->nrefs = 1;

    /* Copy attribute's name */
    attr_dst->shared->name = H5MM_strdup(attr_src->shared->name);
    HDassert(attr_dst->shared->name);

    /* Copy attribute's datatype */
    /* (Start destination datatype as transient, even if source is named) */
    if(NULL == (attr_dst->shared->dt = H5T_copy(attr_src->shared->dt, H5T_COPY_ALL)))
        HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "cannot copy datatype")

    /* Set the location of the destination datatype */
    if(H5T_set_loc(attr_dst->shared->dt, file_dst, H5T_LOC_DISK) < 0)
        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "cannot mark datatype on disk")

    /* Check for named datatype being copied */
    if(H5T_committed(attr_src->shared->dt)) {
        H5O_loc_t         *src_oloc;           /* Pointer to source datatype's object location */
        H5O_loc_t         *dst_oloc;           /* Pointer to dest. datatype's object location */

        /* Get group entries for source & destination */
        src_oloc = H5T_oloc(attr_src->shared->dt);
        HDassert(src_oloc);
        dst_oloc = H5T_oloc(attr_dst->shared->dt);
        HDassert(dst_oloc);

        /* Reset object location for new object */
        H5O_loc_reset(dst_oloc);
        dst_oloc->file = file_dst;

        /* Copy the shared object from source to destination */
        if(H5O_copy_header_map(src_oloc, dst_oloc, dxpl_id, cpy_info, FALSE) < 0)
            HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "unable to copy object")

        /* Update shared message info from named datatype info */
        H5T_update_shared(attr_dst->shared->dt);
    } /* end if */
    else {
        /* If the datatype is not named, it may have been shared in the
         * source file's heap.  Un-share it for now. We'll try to shared
         * it in the destination file below.
         */
        if(H5O_msg_reset_share(H5O_DTYPE_ID, attr_dst->shared->dt) < 0)
            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to reset datatype sharing")
    } /* end else */

    /* Copy the dataspace for the attribute */
    attr_dst->shared->ds = H5S_copy(attr_src->shared->ds, FALSE, FALSE);
    HDassert(attr_dst->shared->ds);

    /* Reset the dataspace's sharing in the source file before trying to share
     * it in the destination.
     */
    if(H5O_msg_reset_share(H5O_SDSPACE_ID, attr_dst->shared->ds) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to reset dataspace sharing")


    /* Try to share both the datatype and dataset.  This does nothing if the
     * datatype is committed or sharing is disabled.
     */
    if(H5SM_try_share(file_dst, dxpl_id, NULL, H5O_DTYPE_ID, attr_dst->shared->dt, NULL) < 0)
	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, NULL, "can't share attribute datatype")
    if(H5SM_try_share(file_dst, dxpl_id, NULL, H5O_SDSPACE_ID, attr_dst->shared->ds, NULL) < 0)
	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, NULL, "can't share attribute dataspace")

    /* Compute the sizes of the datatype and dataspace. This is their raw
     * size unless they're shared.
     */
    attr_dst->shared->dt_size = H5O_msg_raw_size(file_dst, H5O_DTYPE_ID, FALSE, attr_dst->shared->dt);
    HDassert(attr_dst->shared->dt_size > 0);
    attr_dst->shared->ds_size = H5O_msg_raw_size(file_dst, H5O_SDSPACE_ID, FALSE, attr_dst->shared->ds);
    HDassert(attr_dst->shared->ds_size > 0);

    /* Check whether to recompute the size of the attribute */
    /* (happens when the datatype or dataspace changes sharing status) */
    if(attr_dst->shared->dt_size != attr_src->shared->dt_size || attr_dst->shared->ds_size != attr_src->shared->ds_size)
        *recompute_size = TRUE;

    /* Compute the size of the data */
    H5_ASSIGN_OVERFLOW(attr_dst->shared->data_size, H5S_GET_EXTENT_NPOINTS(attr_dst->shared->ds) * H5T_get_size(attr_dst->shared->dt), hsize_t, size_t);

    /* Copy (& convert) the data, if necessary */
    if(attr_src->shared->data) {
        if(NULL == (attr_dst->shared->data = H5FL_BLK_MALLOC(attr_buf, attr_dst->shared->data_size)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

        /* Check if we need to convert data */
        if(H5T_detect_class(attr_src->shared->dt, H5T_VLEN, FALSE) > 0) {
            H5T_path_t  *tpath_src_mem, *tpath_mem_dst;   /* Datatype conversion paths */
            H5T_t *dt_mem;              /* Memory datatype */
            size_t src_dt_size;         /* Source datatype size */
            size_t tmp_dt_size;         /* Temp. datatype size */
            size_t max_dt_size;         /* Max atatype size */
            H5S_t *buf_space;           /* Dataspace describing buffer */
            hsize_t buf_dim;            /* Dimension for buffer */
            size_t nelmts;              /* Number of elements in buffer */
            size_t buf_size;            /* Size of copy buffer */

            /* Create datatype ID for src datatype */
            if((tid_src = H5I_register(H5I_DATATYPE, attr_src->shared->dt, FALSE)) < 0)
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register source file datatype")

            /* create a memory copy of the variable-length datatype */
            if(NULL == (dt_mem = H5T_copy(attr_src->shared->dt, H5T_COPY_TRANSIENT)))
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy")
            if((tid_mem = H5I_register(H5I_DATATYPE, dt_mem, FALSE)) < 0)
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register memory datatype")

            /* create variable-length datatype at the destinaton file */
            if((tid_dst = H5I_register(H5I_DATATYPE, attr_dst->shared->dt, FALSE)) < 0)
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register destination file datatype")

            /* Set up the conversion functions */
            if(NULL == (tpath_src_mem = H5T_path_find(attr_src->shared->dt, dt_mem, NULL, NULL, dxpl_id, FALSE)))
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to convert between src and mem datatypes")
            if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, attr_dst->shared->dt, NULL, NULL, dxpl_id, FALSE)))
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to convert between mem and dst datatypes")

            /* Determine largest datatype size */
            if(0 == (src_dt_size = H5T_get_size(attr_src->shared->dt)))
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to determine datatype size")
            if(0 == (tmp_dt_size = H5T_get_size(dt_mem)))
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to determine datatype size")
            max_dt_size = MAX(src_dt_size, tmp_dt_size);
            if(0 == (tmp_dt_size = H5T_get_size(attr_dst->shared->dt)))
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to determine datatype size")
            max_dt_size = MAX(max_dt_size, tmp_dt_size);

            /* Set number of whole elements that fit in buffer */
            if(0 == (nelmts = attr_src->shared->data_size / src_dt_size))
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "element size too large")

            /* Set up number of bytes to copy, and initial buffer size */
            buf_size = nelmts * max_dt_size;

            /* Create dataspace for number of elements in buffer */
            buf_dim = nelmts;

            /* Create the space and set the initial extent */
            if(NULL == (buf_space = H5S_create_simple((unsigned)1, &buf_dim, NULL)))
                HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCREATE, NULL, "can't create simple dataspace")

            /* Atomize */
            if((buf_sid = H5I_register(H5I_DATASPACE, buf_space, FALSE)) < 0) {
                H5S_close(buf_space);
                HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, NULL, "unable to register dataspace ID")
            } /* end if */

            /* Allocate memory for recclaim buf */
            if(NULL == (reclaim_buf = H5FL_BLK_MALLOC(attr_buf, buf_size)))
                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation NULLed for raw data chunk")

            /* Allocate memory for copying the chunk */
            if(NULL == (buf = H5FL_BLK_MALLOC(attr_buf, buf_size)))
                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation NULLed for raw data chunk")

            HDmemcpy(buf, attr_src->shared->data, attr_src->shared->data_size);

            /* Convert from source file to memory */
            if(H5T_convert(tpath_src_mem, tid_src, tid_mem, nelmts, (size_t)0, (size_t)0, buf, NULL, dxpl_id) < 0)
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "datatype conversion NULLed")

            HDmemcpy(reclaim_buf, buf, buf_size);

            /* Convert from memory to destination file */
            if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, NULL, dxpl_id) < 0)
                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "datatype conversion NULLed")

            HDmemcpy(attr_dst->shared->data, buf, attr_dst->shared->data_size);

            if(H5D_vlen_reclaim(tid_mem, buf_space, H5P_DATASET_XFER_DEFAULT, reclaim_buf) < 0)
                HGOTO_ERROR(H5E_DATASET, H5E_BADITER, NULL, "unable to reclaim variable-length data")
        }  /* end if */
        else {
            HDassert(attr_dst->shared->data_size == attr_src->shared->data_size);
            HDmemcpy(attr_dst->shared->data, attr_src->shared->data, attr_src->shared->data_size);
        } /* end else */
    } /* end if(attr_src->shared->data) */

    /* Recompute the version to encode the destination attribute */
    if(H5A_set_version(file_dst, attr_dst) < 0)
        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, NULL, "unable to update attribute version")

    /* Set return value */
    ret_value = attr_dst;

done:
    if(buf_sid > 0)
        if(H5I_dec_ref(buf_sid, FALSE) < 0)
            HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "Can't decrement temporary dataspace ID")
    if(tid_src > 0)
        /* Don't decrement ID, we want to keep underlying datatype */
        if(H5I_remove(tid_src) == NULL)
            HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "Can't decrement temporary datatype ID")
    if(tid_dst > 0)
        /* Don't decrement ID, we want to keep underlying datatype */
        if(H5I_remove(tid_dst) == NULL)
            HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "Can't decrement temporary datatype ID")
    if(tid_mem > 0)
        /* Decrement the memory datatype ID, it's transient */
        if(H5I_dec_ref(tid_mem, FALSE) < 0)
            HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "Can't decrement temporary datatype ID")
    if(buf)
        buf = H5FL_BLK_FREE(attr_buf, buf);
    if(reclaim_buf)
        reclaim_buf = H5FL_BLK_FREE(attr_buf, reclaim_buf);

    /* Release destination attribute information on failure */
    if(!ret_value && attr_dst && H5A_close(attr_dst) < 0)
        HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")

    FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_attr_copy_file() */


/*-------------------------------------------------------------------------
 * Function:    H5A_attr_post_copy_file
 *
 * Purpose:     Finish copying a message from between files.
 *              We have to copy the values of a reference attribute in the
 *              post copy because H5O_post_copy_file() fails at the case that
 *              an object may have a reference attribute that points to the
 *              object itself.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Peter Cao
 *              March 6, 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5A_attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t UNUSED *attr_src,
    H5O_loc_t *dst_oloc, const H5A_t *attr_dst, hid_t dxpl_id, H5O_copy_t *cpy_info)
{
    H5F_t  *file_src = src_oloc->file;
    H5F_t  *file_dst = dst_oloc->file;
    herr_t ret_value = SUCCEED;   /* Return value */


    FUNC_ENTER_NOAPI_NOINIT(H5A_attr_post_copy_file)

    /* check args */
    HDassert(attr_dst);
    HDassert(file_dst);


    /* Only need to fix reference attribute with real data being copied to
     *  another file.
     */
    if((NULL != attr_dst->shared->data) && (H5T_get_class(attr_dst->shared->dt, FALSE) == H5T_REFERENCE) ) {

        /* copy object pointed by reference. The current implementation does not
         *  deal with nested reference such as reference in a compound structure
         */

        /* Check for expanding references */
        if(cpy_info->expand_ref) {
            size_t ref_count;

            /* Determine # of reference elements to copy */
            ref_count = attr_dst->shared->data_size / H5T_get_size(attr_dst->shared->dt);

            /* Copy objects referenced in source buffer to destination file and set destination elements */
            if(H5O_copy_expand_ref(file_src, attr_dst->shared->data, dxpl_id,
                    file_dst, attr_dst->shared->data, ref_count, H5T_get_ref_type(attr_dst->shared->dt), cpy_info) < 0)
                HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, FAIL, "unable to copy reference attribute")
        } /* end if */
        else
            /* Reset value to zero */
            HDmemset(attr_dst->shared->data, 0, attr_dst->shared->data_size);
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_attr_post_copy_file() */


/*-------------------------------------------------------------------------
 * Function:    H5A_dense_copy_file_cb
 *
 * Purpose:     Callback routine for copying a dense attribute from SRC to DST.
 *
 * Return:      Success:        Non-negative
 *              Failure:        Negative
 *
 * Programmer:  Peter Cao
 *              xcao@hdfgroup.org
 *              July 20, 2007
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A_dense_copy_file_cb(const H5A_t *attr_src, void *_udata)
{
    H5A_dense_file_cp_ud_t *udata = (H5A_dense_file_cp_ud_t *)_udata;
    H5A_t *attr_dst = NULL;
    herr_t ret_value = H5_ITER_CONT;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_dense_copy_file_cb)

    /* check arguments */
    HDassert(attr_src);
    HDassert(udata);
    HDassert(udata->ainfo);
    HDassert(udata->file);
    HDassert(udata->cpy_info);

    if ( NULL == (attr_dst=H5A_attr_copy_file(attr_src, udata->file,
        udata->recompute_size, udata->cpy_info,  udata->dxpl_id)))
        HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")

    /* Reset shared location information */
    if(H5O_msg_reset_share(H5O_ATTR_ID, attr_dst) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to reset attribute sharing")

    /* Insert attribute into dense storage */
    if(H5A_dense_insert(udata->file, udata->dxpl_id, udata->ainfo, attr_dst) < 0)
        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to add to dense storage")

done:
    if (attr_dst) {
        (void)H5A_free(attr_dst);
        (void)H5FL_FREE(H5A_t, attr_dst);
    }

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_dense_copy_file_cb() */


/*-------------------------------------------------------------------------
 * Function:    H5A_dense_copy_file_all
 *
 * Purpose:     Copy all dense attributes from SRC to DST.
 *
 * Return:      Success:        Non-negative
 *              Failure:        Negative
 *
 * Programmer:  Peter Cao
 *              xcao@hdfgroup.org
 *              July 20, 2007
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5A_dense_copy_file_all(H5F_t *file_src, H5O_ainfo_t *ainfo_src, H5F_t *file_dst,
    const H5O_ainfo_t *ainfo_dst, hbool_t *recompute_size, H5O_copy_t *cpy_info, hid_t dxpl_id)
{
    H5A_dense_file_cp_ud_t udata;       /* User data for iteration callback */
    H5A_attr_iter_op_t attr_op;    /* Attribute operator */
    herr_t ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_dense_copy_file_all)

    /* check arguments */
    HDassert(ainfo_src);
    HDassert(ainfo_dst);

    udata.ainfo = ainfo_dst;             /* Destination dense information    */
    udata.file = file_dst;                /* Destination file                 */
    udata.recompute_size = recompute_size;    /* Flag to indicate if size changed */
    udata.cpy_info = cpy_info;                /* Information on copying options   */
    udata.dxpl_id = dxpl_id;                  /* DXPL for operation               */

    attr_op.op_type = H5A_ATTR_OP_LIB;
    attr_op.u.lib_op = H5A_dense_copy_file_cb;

     if(H5A_dense_iterate(file_src, dxpl_id, (hid_t)0, ainfo_src, H5_INDEX_NAME,
            H5_ITER_NATIVE, (hsize_t)0, NULL, &attr_op, &udata) < 0)
        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "error building attribute table")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_dense_copy_file_all */


/*-------------------------------------------------------------------------
 * Function:    H5A_dense_post_copy_file_cb
 *
 * Purpose:     Callback routine to perfom post copy for a dense attribute.
 *
 * Return:      Success:        Non-negative
 *              Failure:        Negative
 *
 * Programmer:  Peter Cao
 *              xcao@hdfgroup.org
 *              July 25, 2007
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5A_dense_post_copy_file_cb(const H5A_t *attr_dst, void *_udata)
{
    H5A_dense_file_cp_ud_t *udata = (H5A_dense_file_cp_ud_t *)_udata;
    herr_t ret_value = H5_ITER_CONT;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_dense_post_copy_file_cb)

    /* check arguments */
    HDassert(attr_dst);
    HDassert(udata);
    HDassert(udata->ainfo);
    HDassert(udata->file);
    HDassert(udata->cpy_info);

    if ( H5A_attr_post_copy_file(udata->oloc_src, NULL,
         udata->oloc_dst, attr_dst, udata->dxpl_id, udata->cpy_info) < 0)
        HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")

done:

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_dense_post_copy_file_cb() */


/*-------------------------------------------------------------------------
 * Function:    H5A_dense_post_copy_file_all
 *
 * Purpose:     Do post copy for all dense attributes.
 *
 * Return:      Success:        Non-negative
 *              Failure:        Negative
 *
 * Programmer:  Peter Cao
 *              xcao@hdfgroup.org
 *              July 25, 2007
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5A_dense_post_copy_file_all(const H5O_loc_t *src_oloc, const H5O_ainfo_t *ainfo_src,
    H5O_loc_t *dst_oloc, H5O_ainfo_t *ainfo_dst, hid_t dxpl_id, H5O_copy_t *cpy_info)
{
    H5A_dense_file_cp_ud_t udata;       /* User data for iteration callback */
    H5A_attr_iter_op_t attr_op;    /* Attribute operator */
    herr_t ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5A_dense_post_copy_file_all)

    /* check arguments */
    HDassert(ainfo_src);
    HDassert(ainfo_dst);
    HDassert(src_oloc);
    HDassert(dst_oloc);
    HDassert(src_oloc->file);
    HDassert(dst_oloc->file);

    udata.ainfo = ainfo_src;
    udata.file = src_oloc->file;
    udata.cpy_info = cpy_info;                /* Information on copying options   */
    udata.dxpl_id = dxpl_id;                  /* DXPL for operation               */
    udata.oloc_src = src_oloc;
    udata.oloc_dst = dst_oloc;

    attr_op.op_type = H5A_ATTR_OP_LIB;
    attr_op.u.lib_op = H5A_dense_post_copy_file_cb;

     if(H5A_dense_iterate(dst_oloc->file, dxpl_id, (hid_t)0, ainfo_dst, H5_INDEX_NAME,
            H5_ITER_NATIVE, (hsize_t)0, NULL, &attr_op, &udata) < 0)
        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "error building attribute table")

done:
    FUNC_LEAVE_NOAPI(ret_value)
}