summaryrefslogtreecommitdiffstats
path: root/src/H5Eint.c
blob: 6c466a9caa075429e016932213ffaf2cf6252157 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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:	H5Eint.c
 *		April 11 2007
 *		Quincey Koziol <koziol@hdfgroup.org>
 *
 * Purpose:	General use, "internal" routines for error handling.
 *
 *-------------------------------------------------------------------------
 */

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

#define H5E_PACKAGE		/*suppress error about including H5Epkg   */

/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC	H5E_init_int_interface


/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions			*/
#include "H5Epkg.h"		/* Error handling		  	*/
#include "H5Iprivate.h"		/* IDs                                  */
#include "H5MMprivate.h"	/* Memory management			*/


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


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

/* Printing information */
typedef struct H5E_print_t {
    FILE        *stream;
    H5E_cls_t   cls;
} H5E_print_t;


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


/********************/
/* Local Prototypes */
/********************/
#ifndef H5_NO_DEPRECATED_SYMBOLS
static herr_t H5E_walk1_cb(int n, H5E_error1_t *err_desc,
    void *client_data);
#endif /* H5_NO_DEPRECATED_SYMBOLS */
static herr_t H5E_walk2_cb(unsigned n, const H5E_error2_t *err_desc,
    void *client_data);
static herr_t  H5E_clear_entries(H5E_t *estack, size_t nentries);


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

#ifndef H5_HAVE_THREADSAFE
/*
 * The current error stack.
 */
H5E_t H5E_stack_g[1];
#endif /* H5_HAVE_THREADSAFE */


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

/* HDF5 error class ID */
hid_t H5E_ERR_CLS_g = FAIL;

/*
 * Predefined errors. These are initialized at runtime in H5E_init_interface()
 * in this source file.
 */
/* Include the automatically generated error code definitions */
#include "H5Edefin.h"


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

#ifdef H5_HAVE_PARALLEL
/*
 * variables used for MPI error reporting
 */
char	H5E_mpi_error_str[MPI_MAX_ERROR_STRING];
int	H5E_mpi_error_str_len;
#endif /* H5_HAVE_PARALLEL */



/*--------------------------------------------------------------------------
NAME
   H5E_init_int_interface -- Initialize interface-specific information
USAGE
    herr_t H5E_init_int_interface()
RETURNS
    Non-negative on success/Negative on failure
DESCRIPTION
    Initializes any interface-specific data or routines.  (Just calls
    H5E_init() currently).

--------------------------------------------------------------------------*/
static herr_t
H5E_init_int_interface(void)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5E_init_int_interface)

    FUNC_LEAVE_NOAPI(H5E_init())
} /* H5E_init_int_interface() */


/*-------------------------------------------------------------------------
 * Function:	H5E_get_msg
 *
 * Purpose:	Private function to retrieve an error message.
 *
 * Return:      Non-negative for name length if succeeds(zero means no name);
 *              otherwise returns negative value.
 *
 * Programmer:	Raymond Lu
 *              Friday, July 14, 2003
 *
 *-------------------------------------------------------------------------
 */
ssize_t
H5E_get_msg(const H5E_msg_t *msg, H5E_type_t *type, char *msg_str, size_t size)
{
    ssize_t       len;          /* Length of error message */

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5E_get_msg)

    /* Check arguments */
    HDassert(msg);

    /* Get the length of the message string */
    len = (ssize_t)HDstrlen(msg->msg);

    /* Copy the message into the user's buffer, if given */
    if(msg_str) {
       HDstrncpy(msg_str, msg->msg, MIN((size_t)(len+1), size));
       if((size_t)len >= size)
          msg_str[size - 1] = '\0';
    } /* end if */

    /* Give the message type, if asked */
    if(type)
        *type = msg->type;

    /* Set the return value to the full length of the message */
    FUNC_LEAVE_NOAPI(len)
} /* end H5E_get_msg() */

#ifndef H5_NO_DEPRECATED_SYMBOLS

/*-------------------------------------------------------------------------
 * Function:	H5E_walk1_cb
 *
 * Purpose:	This function is for backward compatibility.
 *              This is a default error stack traversal callback function
 *		that prints error messages to the specified output stream.
 *		This function is for backward compatibility with v1.6.
 *		It is not meant to be called directly but rather as an
 *		argument to the H5Ewalk() function.  This function is called
 *		also by H5Eprint().  Application writers are encouraged to
 *		use this function as a model for their own error stack
 *		walking functions.
 *
 *		N is a counter for how many times this function has been
 *		called for this particular traversal of the stack.  It always
 *		begins at zero for the first error on the stack (either the
 *		top or bottom error, or even both, depending on the traversal
 *		direction and the size of the stack).
 *
 *		ERR_DESC is an error description.  It contains all the
 *		information about a particular error.
 *
 *		CLIENT_DATA is the same pointer that was passed as the
 *		CLIENT_DATA argument of H5Ewalk().  It is expected to be a
 *		file pointer (or stderr if null).
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:  Raymond Lu
 *		Thursday, May 11, 2006
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5E_walk1_cb(int n, H5E_error1_t *err_desc, void *client_data)
{
    H5E_print_t         *eprint  = (H5E_print_t *)client_data;
    FILE		*stream;        /* I/O stream to print output to */
    H5E_cls_t           *cls_ptr;       /* Pointer to error class */
    H5E_msg_t           *maj_ptr;       /* Pointer to major error info */
    H5E_msg_t           *min_ptr;       /* Pointer to minor error info */
    const char		*maj_str = "No major description";      /* Major error description */
    const char		*min_str = "No minor description";      /* Minor error description */
    unsigned            have_desc = 1;  /* Flag to indicate whether the error has a "real" description */
    herr_t              ret_value = SUCCEED;

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5E_walk1_cb)

    /* Check arguments */
    HDassert(err_desc);

    /* If no client data was passed, output to stderr */
    if(!client_data)
        stream = stderr;
    else
        stream = eprint->stream;

    /* Get descriptions for the major and minor error numbers */
    maj_ptr = (H5E_msg_t *)H5I_object_verify(err_desc->maj_num, H5I_ERROR_MSG);
    min_ptr = (H5E_msg_t *)H5I_object_verify(err_desc->min_num, H5I_ERROR_MSG);

    /* Check for bad pointer(s), but can't issue error, just leave */
    if(!maj_ptr || !min_ptr)
        HGOTO_DONE(FAIL)

    if(maj_ptr->msg)
        maj_str = maj_ptr->msg;
    if(min_ptr->msg)
        min_str = min_ptr->msg;

    /* Get error class info */
    cls_ptr = maj_ptr->cls;

    /* Print error class header if new class */
    if(eprint->cls.lib_name == NULL || HDstrcmp(cls_ptr->lib_name, eprint->cls.lib_name)) {
        /* update to the new class information */
        if(cls_ptr->cls_name)
            eprint->cls.cls_name = cls_ptr->cls_name;
        if(cls_ptr->lib_name)
            eprint->cls.lib_name = cls_ptr->lib_name;
        if(cls_ptr->lib_vers)
            eprint->cls.lib_vers = cls_ptr->lib_vers;

        fprintf(stream, "%s-DIAG: Error detected in %s (%s) ", cls_ptr->cls_name, cls_ptr->lib_name, cls_ptr->lib_vers);

        /* try show the process or thread id in multiple processes cases*/
#ifdef H5_HAVE_PARALLEL
        {
            int mpi_rank, mpi_initialized;

	    MPI_Initialized(&mpi_initialized);
	    if(mpi_initialized) {
	        MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
	        fprintf(stream, "MPI-process %d", mpi_rank);
	    } /* end if */
            else
	        fprintf(stream, "thread 0");
        } /* end block */
#elif defined(H5_HAVE_THREADSAFE)
        fprintf(stream, "thread %lu", (unsigned long)HDpthread_self_ulong());
#else
        fprintf(stream, "thread 0");
#endif
        fprintf(stream, ":\n");
    } /* end if */

    /* Check for "real" error description - used to format output more nicely */
    if(err_desc->desc == NULL || HDstrlen(err_desc->desc) == 0)
        have_desc=0;

    /* Print error message */
    fprintf(stream, "%*s#%03d: %s line %u in %s()%s%s\n",
	     H5E_INDENT, "", n, err_desc->file_name, err_desc->line,
	     err_desc->func_name, (have_desc ? ": " : ""),
             (have_desc ? err_desc->desc : ""));
    fprintf(stream, "%*smajor: %s\n", (H5E_INDENT * 2), "", maj_str);
    fprintf(stream, "%*sminor: %s\n", (H5E_INDENT * 2), "", min_str);

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_walk1_cb() */
#endif /* H5_NO_DEPRECATED_SYMBOLS */


/*-------------------------------------------------------------------------
 * Function:	H5E_walk2_cb
 *
 * Purpose:	This is a default error stack traversal callback function
 *		that prints error messages to the specified output stream.
 *		It is not meant to be called directly but rather as an
 *		argument to the H5Ewalk2() function.  This function is
 *		called also by H5Eprint2().  Application writers are
 *		encouraged to use this function as a model for their own
 *		error stack walking functions.
 *
 *		N is a counter for how many times this function has been
 *		called for this particular traversal of the stack.  It always
 *		begins at zero for the first error on the stack (either the
 *		top or bottom error, or even both, depending on the traversal
 *		direction and the size of the stack).
 *
 *		ERR_DESC is an error description.  It contains all the
 *		information about a particular error.
 *
 *		CLIENT_DATA is the same pointer that was passed as the
 *		CLIENT_DATA argument of H5Ewalk().  It is expected to be a
 *		file pointer (or stderr if null).
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Friday, December 12, 1997
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5E_walk2_cb(unsigned n, const H5E_error2_t *err_desc, void *client_data)
{
    H5E_print_t         *eprint  = (H5E_print_t *)client_data;
    FILE		*stream;        /* I/O stream to print output to */
    H5E_cls_t           *cls_ptr;       /* Pointer to error class */
    H5E_msg_t           *maj_ptr;       /* Pointer to major error info */
    H5E_msg_t           *min_ptr;       /* Pointer to minor error info */
    const char		*maj_str = "No major description";      /* Major error description */
    const char		*min_str = "No minor description";      /* Minor error description */
    unsigned            have_desc = 1;  /* Flag to indicate whether the error has a "real" description */
    herr_t              ret_value = SUCCEED;

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5E_walk2_cb)

    /* Check arguments */
    HDassert(err_desc);

    /* If no client data was passed, output to stderr */
    if(!client_data)
        stream = stderr;
    else
        stream = eprint->stream;

    /* Get descriptions for the major and minor error numbers */
    maj_ptr = (H5E_msg_t *)H5I_object_verify(err_desc->maj_num, H5I_ERROR_MSG);
    min_ptr = (H5E_msg_t *)H5I_object_verify(err_desc->min_num, H5I_ERROR_MSG);

    /* Check for bad pointer(s), but can't issue error, just leave */
    if(!maj_ptr || !min_ptr)
        HGOTO_DONE(FAIL)

    if(maj_ptr->msg)
        maj_str = maj_ptr->msg;
    if(min_ptr->msg)
        min_str = min_ptr->msg;

    /* Get error class info.  Don't use the class of the major or minor error because
     * they might be different. */
    cls_ptr = (H5E_cls_t *)H5I_object_verify(err_desc->cls_id, H5I_ERROR_CLASS);

    /* Print error class header if new class */
    if(eprint->cls.lib_name == NULL || HDstrcmp(cls_ptr->lib_name, eprint->cls.lib_name)) {
        /* update to the new class information */
        if(cls_ptr->cls_name)
            eprint->cls.cls_name = cls_ptr->cls_name;
        if(cls_ptr->lib_name)
            eprint->cls.lib_name = cls_ptr->lib_name;
        if(cls_ptr->lib_vers)
            eprint->cls.lib_vers = cls_ptr->lib_vers;

        fprintf(stream, "%s-DIAG: Error detected in %s (%s) ", cls_ptr->cls_name, cls_ptr->lib_name, cls_ptr->lib_vers);

        /* try show the process or thread id in multiple processes cases*/
#ifdef H5_HAVE_PARALLEL
        {
            int mpi_rank, mpi_initialized;

	    MPI_Initialized(&mpi_initialized);
	    if(mpi_initialized) {
	        MPI_Comm_rank(MPI_COMM_WORLD, &mpi_rank);
	        fprintf(stream, "MPI-process %d", mpi_rank);
	    } /* end if */
            else
	        fprintf(stream, "thread 0");
        } /* end block */
#elif defined(H5_HAVE_THREADSAFE)
        fprintf(stream, "thread %lu", (unsigned long)HDpthread_self_ulong());
#else
        fprintf(stream, "thread 0");
#endif
        fprintf(stream, ":\n");
    } /* end if */

    /* Check for "real" error description - used to format output more nicely */
    if(err_desc->desc == NULL || HDstrlen(err_desc->desc) == 0)
        have_desc = 0;

    /* Print error message */
    fprintf(stream, "%*s#%03u: %s line %u in %s()%s%s\n",
	     H5E_INDENT, "", n, err_desc->file_name, err_desc->line,
	     err_desc->func_name, (have_desc ? ": " : ""),
             (have_desc ? err_desc->desc : ""));
    fprintf(stream, "%*smajor: %s\n", (H5E_INDENT * 2), "", maj_str);
    fprintf(stream, "%*sminor: %s\n", (H5E_INDENT * 2), "", min_str);

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_walk2_cb() */


/*-------------------------------------------------------------------------
 * Function:	H5E_print
 *
 * Purpose:	Private function to print the error stack in some default
 *              way.  This is just a convenience function for H5Ewalk() and
 *              H5Ewalk2() with a function that prints error messages.
 *              Users are encouraged to write there own more specific error
 *              handlers.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Friday, February 27, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_print(const H5E_t *estack, FILE *stream, hbool_t bk_compatible)
{
    H5E_print_t eprint;         /* Callback information to pass to H5E_walk() */
    H5E_walk_op_t walk_op;      /* Error stack walking callback */
    herr_t ret_value = SUCCEED;

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_NOAPI_NOINIT(H5E_print)

    /* Sanity check */
    HDassert(estack);

    /* If no stream was given, use stderr */
    if(!stream)
        eprint.stream = stderr;
    else
        eprint.stream = stream;

    /* Reset the original error class information */
    HDmemset(&eprint.cls, 0, sizeof(H5E_cls_t));

    /* Walk the error stack */
    if(bk_compatible) {
#ifndef H5_NO_DEPRECATED_SYMBOLS
        walk_op.vers = 1;
        walk_op.u.func1 = H5E_walk1_cb;
        if(H5E_walk(estack, H5E_WALK_DOWNWARD, &walk_op, (void*)&eprint) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTLIST, FAIL, "can't walk error stack")
#else /* H5_NO_DEPRECATED_SYMBOLS */
        HDassert(0 && "version 1 error stack print without deprecated symbols!");
#endif /* H5_NO_DEPRECATED_SYMBOLS */
    } /* end if */
    else {
        walk_op.vers = 2;
        walk_op.u.func2 = H5E_walk2_cb;
        if(H5E_walk(estack, H5E_WALK_DOWNWARD, &walk_op, (void*)&eprint) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTLIST, FAIL, "can't walk error stack")
    } /* end else */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_print() */


/*-------------------------------------------------------------------------
 * Function:	H5E_walk
 *
 * Purpose:	Private function for H5Ewalk.
 *              Walks the error stack, calling the specified function for
 *		each error on the stack.  The DIRECTION argument determines
 *		whether the stack is walked from the inside out or the
 *		outside in.  The value H5E_WALK_UPWARD means begin with the
 *		most specific error and end at the API; H5E_WALK_DOWNWARD
 *		means to start at the API and end at the inner-most function
 *		where the error was first detected.
 *
 *		The function pointed to by STACK_FUNC will be called for
 *		each error record in the error stack. It's arguments will
 *		include an index number (beginning at zero regardless of
 *		stack traversal	direction), an error stack entry, and the
 *		CLIENT_DATA pointer passed to H5E_print.
 *
 *		The function FUNC is also provided for backward compatibility.
 *		When BK_COMPATIBLE is set to be TRUE, FUNC is used to be
 *		compatible with older library.  If BK_COMPATIBLE is FALSE,
 *		STACK_FUNC is used.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Friday, December 12, 1997
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_walk(const H5E_t *estack, H5E_direction_t direction, const H5E_walk_op_t *op,
    void *client_data)
{
    int		i;              /* Local index variable */
    herr_t	status;         /* Status from callback function */
    herr_t ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5E_walk)

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

    /* check args, but rather than failing use some default value */
    if(direction != H5E_WALK_UPWARD && direction != H5E_WALK_DOWNWARD)
	direction = H5E_WALK_UPWARD;

    /* Walk the stack if a callback function was given */
    if(op->vers == 1) {
#ifndef H5_NO_DEPRECATED_SYMBOLS
        if(op->u.func1) {
            H5E_error1_t old_err;

            status = SUCCEED;
            if(H5E_WALK_UPWARD == direction) {
                for(i = 0; i < (int)estack->nused && status >= 0; i++) {
                    /* Point to each error record on the stack and pass it to callback function.*/
                    old_err.maj_num = estack->slot[i].maj_num;
                    old_err.min_num = estack->slot[i].min_num;
                    old_err.func_name = estack->slot[i].func_name;
                    old_err.file_name = estack->slot[i].file_name;
                    old_err.desc = estack->slot[i].desc;
                    old_err.line = estack->slot[i].line;

                    status = (op->u.func1)(i, &old_err, client_data);
                } /* end for */
            } /* end if */
            else {
                H5_CHECK_OVERFLOW(estack->nused - 1, size_t, int);
                for(i = (int)(estack->nused - 1); i >= 0 && status >= 0; i--) {
                    /* Point to each error record on the stack and pass it to callback function.*/
                    old_err.maj_num = estack->slot[i].maj_num;
                    old_err.min_num = estack->slot[i].min_num;
                    old_err.func_name = estack->slot[i].func_name;
                    old_err.file_name = estack->slot[i].file_name;
                    old_err.desc = estack->slot[i].desc;
                    old_err.line = estack->slot[i].line;

                    status = (op->u.func1)((int)(estack->nused - (size_t)(i + 1)), &old_err, client_data);
                } /* end for */
            } /* end else */

            if(status < 0)
                HGOTO_ERROR(H5E_ERROR, H5E_CANTLIST, FAIL, "can't walk error stack")
        } /* end if */
#else /* H5_NO_DEPRECATED_SYMBOLS */
        HDassert(0 && "version 1 error stack walk without deprecated symbols!");
#endif /* H5_NO_DEPRECATED_SYMBOLS */
    } /* end if */
    else {
        HDassert(op->vers == 2);
        if(op->u.func2) {
            status = SUCCEED;
            if(H5E_WALK_UPWARD == direction) {
                for(i = 0; i < (int)estack->nused && status >= 0; i++)
                    status = (op->u.func2)((unsigned)i, estack->slot + i, client_data);
            } /* end if */
            else {
                H5_CHECK_OVERFLOW(estack->nused - 1, size_t, int);
                for(i = (int)(estack->nused - 1); i >= 0 && status >= 0; i--)
                    status = (op->u.func2)((unsigned)(estack->nused - (size_t)(i + 1)), estack->slot + i, client_data);
            } /* end else */

            if(status < 0)
                HGOTO_ERROR(H5E_ERROR, H5E_CANTLIST, FAIL, "can't walk error stack")
        } /* end if */
    } /* end else */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_walk() */


/*-------------------------------------------------------------------------
 * Function:	H5E_get_auto
 *
 * Purpose:	Private function to return the current settings for the
 *              automatic error stack traversal function and its data
 *              for specific error stack. Either (or both) arguments may
 *              be null in which case the value is not returned.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Raymond Lu
 *              July 18, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_get_auto(const H5E_t *estack, H5E_auto_op_t *op, void **client_data)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5E_get_auto)

    HDassert(estack);

    /* Retrieve the requested information */
    if(op)
        *op = estack->auto_op;
    if(client_data)
        *client_data = estack->auto_data;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5E_get_auto2() */


/*-------------------------------------------------------------------------
 * Function:	H5E_set_auto
 *
 * Purpose:	Private function to turn on or off automatic printing of
 *              errors for certain error stack.  When turned on (non-null
 *              FUNC pointer) any API function which returns an error
 *              indication will first call FUNC passing it CLIENT_DATA
 *              as an argument.
 *
 *		The default values before this function is called are
 *		H5Eprint2() with client data being the standard error stream,
 *		stderr.
 *
 *		Automatic stack traversal is always in the H5E_WALK_DOWNWARD
 *		direction.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Friday, February 27, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_set_auto(H5E_t *estack, const H5E_auto_op_t *op, void *client_data)
{
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5E_set_auto)

    HDassert(estack);

    /* Set the automatic error reporting info */
    estack->auto_op = *op;
    estack->auto_data = client_data;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5E_set_auto() */


/*-------------------------------------------------------------------------
 * Function:	H5E_printf_stack
 *
 * Purpose:	Printf-like wrapper around H5E_push_stack.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		Tuesday, August 12, 2008
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_printf_stack(H5E_t *estack, const char *file, const char *func, unsigned line,
    hid_t cls_id, hid_t maj_id, hid_t min_id, const char *fmt, ...)
{
    va_list     ap;                     /* Varargs info */
#ifndef H5_HAVE_VASPRINTF
    int         tmp_len;        /* Current size of description buffer */
    int         desc_len;       /* Actual length of description when formatted */
#endif /* H5_HAVE_VASPRINTF */
    char        *tmp = NULL;      /* Buffer to place formatted description in */
    herr_t	ret_value = SUCCEED;    /* Return value */

    /*
     * WARNING: We cannot call HERROR() from within this function or else we
     *		could enter infinite recursion.  Furthermore, we also cannot
     *		call any other HDF5 macro or function which might call
     *		HERROR().  HERROR() is called by HRETURN_ERROR() which could
     *		be called by FUNC_ENTER().
     */
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5E_printf_stack)

    /* Sanity check */
    HDassert(cls_id > 0);
    HDassert(maj_id > 0);
    HDassert(min_id > 0);
    HDassert(fmt);

/* Note that the variable-argument parsing for the format is identical in
 *      the H5Epush2() routine - correct errors and make changes in both
 *      places. -QAK
 */

    /* Start the variable-argument parsing */
    va_start(ap, fmt);

#ifdef H5_HAVE_VASPRINTF
    /* Use the vasprintf() routine, since it does what we're trying to do below */
    if(HDvasprintf(&tmp, fmt, ap) < 0)
        HGOTO_DONE(FAIL)
#else /* H5_HAVE_VASPRINTF */
    /* Allocate space for the formatted description buffer */
    tmp_len = 128;
    if(NULL == (tmp = H5MM_malloc((size_t)tmp_len)))
        HGOTO_DONE(FAIL)

    /* If the description doesn't fit into the initial buffer size, allocate more space and try again */
    while((desc_len = HDvsnprintf(tmp, (size_t)tmp_len, fmt, ap))
#ifdef H5_VSNPRINTF_WORKS
            >
#else /* H5_VSNPRINTF_WORKS */
            >=
#endif /* H5_VSNPRINTF_WORKS */
            (tmp_len - 1)
#ifndef H5_VSNPRINTF_WORKS
            || (desc_len < 0)
#endif /* H5_VSNPRINTF_WORKS */
            ) {
        /* shutdown & restart the va_list */
        va_end(ap);
        va_start(ap, fmt);

        /* Release the previous description, it's too small */
        H5MM_xfree(tmp);

        /* Allocate a description of the appropriate length */
#ifdef H5_VSNPRINTF_WORKS
        tmp_len = desc_len + 1;
#else /* H5_VSNPRINTF_WORKS */
        tmp_len = 2 * tmp_len;
#endif /* H5_VSNPRINTF_WORKS */
        if(NULL == (tmp = H5MM_malloc((size_t)tmp_len)))
            HGOTO_DONE(FAIL)
    } /* end while */
#endif /* H5_HAVE_VASPRINTF */

    va_end(ap);

    /* Push the error on the stack */
    if(H5E_push_stack(estack, file, func, line, cls_id, maj_id, min_id, tmp) < 0)
        HGOTO_DONE(FAIL)

done:
    if(tmp)
        H5MM_xfree(tmp);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_printf_stack() */


/*-------------------------------------------------------------------------
 * Function:	H5E_push_stack
 *
 * Purpose:	Pushes a new error record onto error stack for the current
 *		thread.  The error has major and minor IDs MAJ_ID and
 *		MIN_ID, the name of a function where the error was detected,
 *		the name of the file where the error was detected, the
 *		line within that file, and an error description string.  The
 *		function name, file name, and error description strings must
 *		be statically allocated (the FUNC_ENTER() macro takes care of
 *		the function name and file name automatically, but the
 *		programmer is responsible for the description string).
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *		Friday, December 12, 1997
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_push_stack(H5E_t *estack, const char *file, const char *func, unsigned line,
    hid_t cls_id, hid_t maj_id, hid_t min_id, const char *desc)
{
    herr_t	ret_value = SUCCEED;      /* Return value */

    /*
     * WARNING: We cannot call HERROR() from within this function or else we
     *		could enter infinite recursion.  Furthermore, we also cannot
     *		call any other HDF5 macro or function which might call
     *		HERROR().  HERROR() is called by HRETURN_ERROR() which could
     *		be called by FUNC_ENTER().
     */
    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5E_push_stack)

    /* Sanity check */
    HDassert(cls_id > 0);
    HDassert(maj_id > 0);
    HDassert(min_id > 0);

    /* Check for 'default' error stack */
    if(estack == NULL)
    	if(NULL == (estack = H5E_get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_DONE(FAIL)

    /*
     * Don't fail if arguments are bad.  Instead, substitute some default
     * value.
     */
    if(!func)
        func = "Unknown_Function";
    if(!file)
        file = "Unknown_File";
    if(!desc)
        desc = "No description given";

    /*
     * Push the error if there's room.  Otherwise just forget it.
     */
    HDassert(estack);

    if(estack->nused < H5E_NSLOTS) {
        /* Increment the IDs to indicate that they are used in this stack */
        if(H5I_inc_ref(cls_id, FALSE) < 0)
            HGOTO_DONE(FAIL)
	estack->slot[estack->nused].cls_id = cls_id;
        if(H5I_inc_ref(maj_id, FALSE) < 0)
            HGOTO_DONE(FAIL)
	estack->slot[estack->nused].maj_num = maj_id;
        if(H5I_inc_ref(min_id, FALSE) < 0)
            HGOTO_DONE(FAIL)
	estack->slot[estack->nused].min_num = min_id;
	if(NULL == (estack->slot[estack->nused].func_name = H5MM_xstrdup(func)))
            HGOTO_DONE(FAIL)
	if(NULL == (estack->slot[estack->nused].file_name = H5MM_xstrdup(file)))
            HGOTO_DONE(FAIL)
	estack->slot[estack->nused].line = line;
	if(NULL == (estack->slot[estack->nused].desc = H5MM_xstrdup(desc)))
            HGOTO_DONE(FAIL)
	estack->nused++;
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_push_stack() */


/*-------------------------------------------------------------------------
 * Function:	H5E_clear_entries
 *
 * Purpose:	Private function to clear the error stack entries for the
 *              specified error stack.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Wednesday, August 6, 2003
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5E_clear_entries(H5E_t *estack, size_t nentries)
{
    H5E_error2_t *error;        /* Pointer to error stack entry to clear */
    unsigned u;                 /* Local index variable */
    herr_t ret_value=SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5E_clear_entries)

    /* Sanity check */
    HDassert(estack);
    HDassert(estack->nused >= nentries);

    /* Empty the error stack from the top down */
    for(u = 0; nentries > 0; nentries--, u++) {
        error = &(estack->slot[estack->nused - (u + 1)]);

        /* Decrement the IDs to indicate that they are no longer used by this stack */
        /* (In reverse order that they were incremented, so that reference counts work well) */
        if(H5I_dec_ref(error->min_num, FALSE, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTDEC, FAIL, "unable to decrement ref count on error message")
        if(H5I_dec_ref(error->maj_num, FALSE, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTDEC, FAIL, "unable to decrement ref count on error message")
        if(H5I_dec_ref(error->cls_id, FALSE, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTDEC, FAIL, "unable to decrement ref count on error class")

        /* Release strings */
        if(error->func_name)
            H5MM_xfree((void *)error->func_name);        /* Casting away const OK - QAK */
        if(error->file_name)
            H5MM_xfree((void *)error->file_name);        /* Casting away const OK - QAK */
        if(error->desc)
            H5MM_xfree((void *)error->desc);     /* Casting away const OK - QAK */
    } /* end for */

    /* Decrement number of errors on stack */
    estack->nused -= u;

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_clear_entries() */


/*-------------------------------------------------------------------------
 * Function:	H5E_clear_stack
 *
 * Purpose:	Private function to clear the error stack for the
 *              specified error stack.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Raymond Lu
 *              Wednesday, July 16, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_clear_stack(H5E_t *estack)
{
    herr_t ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI(H5E_clear_stack, FAIL)

    /* Check for 'default' error stack */
    if(estack == NULL)
    	if(NULL == (estack = H5E_get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get current error stack")

    /* Empty the error stack */
    HDassert(estack);
    if(estack->nused)
        if(H5E_clear_entries(estack, estack->nused) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTSET, FAIL, "can't clear error stack")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_clear_stack() */


/*-------------------------------------------------------------------------
 * Function:	H5E_pop
 *
 * Purpose:	Private function to delete some error messages from the top
 *              of error stack.
 *
 * Return:	Non-negative value on success/Negative on failure
 *
 * Programmer:	Raymond Lu
 *              Friday, July 16, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_pop(H5E_t *estack, size_t count)
{
    herr_t      ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5E_pop)

    /* Sanity check */
    HDassert(estack);
    HDassert(estack->nused >= count);

    /* Remove the entries from the error stack */
    if(H5E_clear_entries(estack, count) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTRELEASE, FAIL, "can't remove errors from stack")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_pop() */


/*-------------------------------------------------------------------------
 * Function:	H5E_dump_api_stack
 *
 * Purpose:	Private function to dump the error stack during an error in
 *              an API function if a callback function is defined for the
 *              current error stack.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Wednesday, August 6, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_dump_api_stack(int is_api)
{
    herr_t ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI(H5E_dump_api_stack, FAIL)

    /* Only dump the error stack during an API call */
    if(is_api) {
        H5E_t *estack = H5E_get_my_stack();

        HDassert(estack);
        if(estack->auto_op.vers == 1) {
#ifndef H5_NO_DEPRECATED_SYMBOLS
            if(estack->auto_op.u.func1)
                (void)((estack->auto_op.u.func1)(estack->auto_data));
#else /* H5_NO_DEPRECATED_SYMBOLS */
            HDassert(0 && "version 1 error stack dump without deprecated symbols!");
#endif /* H5_NO_DEPRECATED_SYMBOLS */
        } /* end if */
        else {
            if(estack->auto_op.u.func2)
                (void)((estack->auto_op.u.func2)(H5E_DEFAULT, estack->auto_data));
        } /* end else */
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_dump_api_stack() */