summaryrefslogtreecommitdiffstats
path: root/c++/src/H5File.cpp
blob: f92171b0b1e72d5f0c54cd30d31fc48a8eae37a8 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include <iostream>
#include <string>

#include "H5Include.h"
#include "H5Exception.h"
#include "H5IdComponent.h"
#include "H5PropList.h"
#include "H5FaccProp.h"
#include "H5FcreatProp.h"
#include "H5OcreatProp.h"
#include "H5DxferProp.h"
#include "H5DcreatProp.h"
#include "H5LcreatProp.h"
#include "H5LaccProp.h"
#include "H5DaccProp.h"
#include "H5Location.h"
#include "H5Object.h"
#include "H5CommonFG.h"
#include "H5Group.h"
#include "H5AbstractDs.h"
#include "H5DataSpace.h"
#include "H5DataSet.h"
#include "H5File.h"
#include "H5Alltypes.h"

namespace H5 {
using std::cerr;
using std::endl;

//--------------------------------------------------------------------------
// Function     H5File default constructor
///\brief       Default constructor: creates a stub H5File object.
// December 2000
//--------------------------------------------------------------------------
H5File::H5File() : Group(), id(H5I_INVALID_HID)
{
}

//--------------------------------------------------------------------------
// Function:    H5File overloaded constructor
///\brief       Creates or opens an HDF5 file depending on the parameter flags.
///\param       name         - IN: Name of the file
///\param       flags        - IN: File access flags
///\param       create_plist - IN: File creation property list, used when
///             modifying default file meta-data.  Default to
///             FileCreatPropList::DEFAULT
///\param       access_plist - IN: File access property list.  Default to
///             FileAccPropList::DEFAULT
///\par Description
///             Valid values of \a flags include:
///             \li \c H5F_ACC_TRUNC - Truncate file, if it already exists,
///                             erasing all data previously stored in
///                             the file.
///             \li \c H5F_ACC_EXCL - Fail if file already exists.
///                 \c H5F_ACC_TRUNC and \c H5F_ACC_EXCL are mutually exclusive
///             \li \c H5F_ACC_RDONLY - Open file as read-only, if it already
///                             exists, and fail, otherwise
///             \li \c H5F_ACC_RDWR - Open file for read/write, if it already
///                             exists, and fail, otherwise
///\par
///             For info on file creation in the case of an already-open file,
///             please refer to the \b Special \b case section of the H5Fcreate
///             API in the C Reference Manual.
// Notes        With a PGI compiler (~2012-2013,) the exception thrown by
//              p_get_file could not be caught in the applications.  Added try
//              block here to catch then re-throw it. -BMR 2013/03/21
// December 2000
//--------------------------------------------------------------------------
H5File::H5File(const char *name, unsigned int flags, const FileCreatPropList &create_plist,
               const FileAccPropList &access_plist)
    : Group(), id(H5I_INVALID_HID)
{
    try {
        p_get_file(name, flags, create_plist, access_plist);
    }
    catch (FileIException &open_file) {
        throw open_file;
    }
}

//--------------------------------------------------------------------------
// Function:    H5File overloaded constructor
///\brief       This is another overloaded constructor.  It differs from the
///             above constructor only in the type of the \a name argument.
///\param       name - IN: Name of the file - \c H5std_string
///\param       flags - IN: File access flags
///\param       create_plist - IN: File creation property list, used when
///             modifying default file meta-data.  Default to
///             FileCreatPropList::DEFAULT
///\param       access_plist - IN: File access property list.  Default to
///             FileAccPropList::DEFAULT
// Notes        With a PGI compiler (~2012-2013,) the exception thrown by
//              p_get_file could not be caught in the applications.  Added try
//              block here to catch then re-throw it. -BMR 2013/03/21
// December 2000
//--------------------------------------------------------------------------
H5File::H5File(const H5std_string &name, unsigned int flags, const FileCreatPropList &create_plist,
               const FileAccPropList &access_plist)
    : Group(), id(H5I_INVALID_HID)
{
    try {
        p_get_file(name.c_str(), flags, create_plist, access_plist);
    }
    catch (FileIException &open_file) {
        throw open_file;
    }
}

#ifndef DOXYGEN_SHOULD_SKIP_THIS
//--------------------------------------------------------------------------
// This function is private and contains common code between the
// constructors taking a string or a char*
// Modification
//              - removed H5F_ACC_CREAT because H5Fcreate will fail with
//              H5F_ACC_CREAT. - BMR, Sep 17, 2014
//--------------------------------------------------------------------------
void
H5File::p_get_file(const char *name, unsigned int flags, const FileCreatPropList &create_plist,
                   const FileAccPropList &access_plist)
{
    // These bits only set for creation, so if any of them are set,
    // create the file.
    if (flags & (H5F_ACC_EXCL | H5F_ACC_TRUNC)) {
        hid_t create_plist_id = create_plist.getId();
        hid_t access_plist_id = access_plist.getId();
        id                    = H5Fcreate(name, flags, create_plist_id, access_plist_id);
        if (id < 0) // throw an exception when open/create fail
        {
            throw FileIException("H5File constructor", "H5Fcreate failed");
        }
    }
    // Open the file if none of the bits above are set.
    else {
        hid_t access_plist_id = access_plist.getId();
        id                    = H5Fopen(name, flags, access_plist_id);
        if (id < 0) // throw an exception when open/create fail
        {
            throw FileIException("H5File constructor", "H5Fopen failed");
        }
    }
}

//--------------------------------------------------------------------------
// Function:    H5File overloaded constructor
///\brief       Creates an H5File object using an existing file id.
///\param       existing_id - IN: Id of an existing file
// Description
//      Mar 29, 2015
//              Added in responding to a request from user Jason Newton.
//              However, it is not recommended to use the private member "id"
//              in applications.  Unlike other situations, where similar
//              constructor is needed by the library in order to return
//              an object, H5File doesn't need it. -BMR (HDFFV-8766 partially)
//--------------------------------------------------------------------------
H5File::H5File(hid_t existing_id) : Group(), id{existing_id}
{
    incRefCount(); // increment number of references to this id
}

#endif // DOXYGEN_SHOULD_SKIP_THIS

//--------------------------------------------------------------------------
// Function:    H5File copy constructor
///\brief       Copy constructor: same HDF5 object as \a original
///             H5File object.
///\param       original - IN: H5File instance to copy
// December 2000
//--------------------------------------------------------------------------
H5File::H5File(const H5File &original) : Group(original), id{original.getId()}
{
    incRefCount(); // increment number of references to this id
}

//--------------------------------------------------------------------------
// Function:    H5File::isHdf5 (static)
///\brief       Determines whether a file in HDF5 format. (Static)
///\param       name - IN: Name of the file
///\return      true if the file is in HDF5 format, and false, otherwise
///\exception   H5::FileIException
// December 2000
//--------------------------------------------------------------------------
bool
H5File::isHdf5(const char *name)
{
    // Calls C routine H5Fis_accessible to determine whether the file is in
    // HDF5 format.  It returns positive value, 0, or negative value
    htri_t ret_value = H5Fis_accessible(name, H5P_DEFAULT);

    if (ret_value > 0)
        return true;
    else if (ret_value == 0)
        return false;
    else // Raise exception when H5Fis_accessible returns a negative value
    {
        throw FileIException("H5File::isHdf5", "H5Fis_accessible returned negative value");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::isHdf5 (static)
///\brief       This is an overloaded member function, provided for convenience.
///             It takes an \c H5std_string for \a name. (Static)
///\param       name - IN: Name of the file - \c H5std_string
// December 2000
//--------------------------------------------------------------------------
bool
H5File::isHdf5(const H5std_string &name)
{
    return (isHdf5(name.c_str()));
}

//--------------------------------------------------------------------------
// Function:    H5File::isAccessible (static)
///\brief       Determines whether a file can be accessed as HDF5. (Static)
///\param       name - IN: Name of the file
///\param       access_plist - IN: File access property list.  Default to
///             FileAccPropList::DEFAULT
///\return      true if the file can be accessed as HDF5, and false, otherwise
///\exception   H5::FileIException
// September 2018
//--------------------------------------------------------------------------
bool
H5File::isAccessible(const char *name, const FileAccPropList &access_plist)
{
    // Calls C routine H5Fis_accessible to determine whether the file is in
    // HDF5 format.  It returns positive value, 0, or negative value
    hid_t  access_plist_id = access_plist.getId();
    htri_t ret_value       = H5Fis_accessible(name, access_plist_id);
    if (ret_value > 0)
        return true;
    else if (ret_value == 0)
        return false;
    else // Raise exception when H5Fis_accessible returns a negative value
    {
        throw FileIException("H5File::isAccessible", "H5Fis_accessible returned negative value");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::isAccessible (static)
///\brief       This is an overloaded member function, provided for convenience.
///             It takes an \c H5std_string for \a name. (Static)
///\param       name - IN: Name of the file - \c H5std_string
///\param       access_plist - IN: File access property list.  Default to
///             FileAccPropList::DEFAULT
// September 2018
//--------------------------------------------------------------------------
bool
H5File::isAccessible(const H5std_string &name, const FileAccPropList &access_plist)
{
    return (isAccessible(name.c_str(), access_plist));
}

//--------------------------------------------------------------------------
// Function:    openFile
///\brief       Opens an HDF5 file
///\param       name         - IN: Name of the file
///\param       flags        - IN: File access flags
///\param       access_plist - IN: File access property list.  Default to
///             FileAccPropList::DEFAULT
///\par Description
///             Valid values of \a flags include:
///             H5F_ACC_RDWR:   Open with read/write access. If the file is
///                     currently open for read-only access then it
///                     will be reopened. Absence of this flag
///                     implies read-only access.
///
///             H5F_ACC_RDONLY: Open with read only access. - default
///
// October 2005
//--------------------------------------------------------------------------
void
H5File::openFile(const char *name, unsigned int flags, const FileAccPropList &access_plist)
{
    try {
        close();
    }
    catch (Exception &close_error) {
        throw FileIException("H5File::openFile", close_error.getDetailMsg());
    }

    hid_t access_plist_id = access_plist.getId();
    id                    = H5Fopen(name, flags, access_plist_id);
    if (id < 0) // throw an exception when open fails
    {
        throw FileIException("H5File::openFile", "H5Fopen failed");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::openFile
///\brief       This is an overloaded member function, provided for convenience.
///             It takes an \c H5std_string for \a name.
///\param       name         - IN: Name of the file - \c H5std_string
///\param       flags        - IN: File access flags
///\param       access_plist - IN: File access property list.  Default to
///             FileAccPropList::DEFAULT
// December 2000
//--------------------------------------------------------------------------
void
H5File::openFile(const H5std_string &name, unsigned int flags, const FileAccPropList &access_plist)
{
    openFile(name.c_str(), flags, access_plist);
}

//--------------------------------------------------------------------------
// Function:    H5File::reOpen
///\brief       Reopens this file.
///
///\exception   H5::FileIException
// Description
//              If this object has represented another HDF5 file, the previous
//              HDF5 file need to be closed first.
// Note:        This wrapper doesn't seem right regarding the 'id' and should
//              be investigated.  BMR - 2/20/2005
// Modification
//              - Replaced resetIdComponent() with decRefCount() to use C
//              library ID reference counting mechanism - BMR, Feb 20, 2005
//              - Replaced decRefCount with close() to let the C library
//              handle the reference counting - BMR, Jun 1, 2006
//--------------------------------------------------------------------------
void
H5File::reOpen()
{
    try {
        close();
    }
    catch (Exception &close_error) {
        throw FileIException("H5File::reOpen", close_error.getDetailMsg());
    }

    // call C routine to reopen the file - Note: not sure about this,
    // which id to be the parameter when closing?
    id = H5Freopen(id);
    if (id < 0) // Raise exception when H5Freopen returns a neg value
        throw FileIException("H5File::reOpen", "H5Freopen failed");
}

//--------------------------------------------------------------------------
// Function:    H5File::getCreatePlist
///\brief       Returns a copy of the creation property list of this file
///\return      FileCreatPropList object
///\exception   H5::FileIException
// December 2000
//--------------------------------------------------------------------------
FileCreatPropList
H5File::getCreatePlist() const
{
    hid_t create_plist_id = H5Fget_create_plist(id);

    // if H5Fget_create_plist returns a valid id, create and return
    // the FileCreatPropList object for this property list
    if (create_plist_id > 0) {
        FileCreatPropList create_plist(create_plist_id);
        return (create_plist);
    }
    else {
        throw FileIException("H5File::getCreatePlist", "H5Fget_create_plist failed");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::getAccessPlist
///\brief       Returns a copy of the access property list of this file
///\return      FileAccPropList object
///\exception   H5::FileIException
// December 2000
//--------------------------------------------------------------------------
FileAccPropList
H5File::getAccessPlist() const
{
    hid_t access_plist_id = H5Fget_access_plist(id);

    // if H5Fget_access_plist returns a valid id, create and return
    // the FileAccPropList object for this property list
    if (access_plist_id > 0) {
        FileAccPropList access_plist(access_plist_id);
        return access_plist;
    }
    else // Raise an exception
    {
        throw FileIException("H5File::getAccessPlist", "H5Fget_access_plist failed");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::getFileInfo
///\brief       Retrieves the general information of this file.
///
///\exception   H5::FileIException
///\par Description
///             The retrieved information may include information about
///             superblock extension, free space management, and shared object
// February 2017
//--------------------------------------------------------------------------
void
H5File::getFileInfo(H5F_info2_t &file_info) const
{
    herr_t ret_value = H5Fget_info2(id, &file_info);
    if (ret_value < 0) {
        throw FileIException("H5File::getFileInfo", "H5Fget_info2 failed");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::getFreeSpace
///\brief       Returns the amount of free space in the file.
///\return      Amount of free space
///\exception   H5::FileIException
// May 2004
//--------------------------------------------------------------------------
hssize_t
H5File::getFreeSpace() const
{
    hssize_t free_space = H5Fget_freespace(id);
    if (free_space < 0) {
        throw FileIException("H5File::getFreeSpace", "H5Fget_freespace failed");
    }
    return (free_space);
}

//--------------------------------------------------------------------------
// Function:    H5File::getObjCount
///\brief       Returns the number of opened object IDs (files, datasets,
///             groups and datatypes) in the same file.
///\param       types - Type of object to retrieve the count
///\return      Number of opened object IDs
///\exception   H5::FileIException
///\par Description
///             The valid values for \a types include:
///             \li \c H5F_OBJ_FILE     - Files only
///             \li \c H5F_OBJ_DATASET  - Datasets only
///             \li \c H5F_OBJ_GROUP    - Groups only
///             \li \c H5F_OBJ_DATATYPE - Named datatypes only
///             \li \c H5F_OBJ_ATTR     - Attributes only
///             \li \c H5F_OBJ_ALL    - All of the above, i.e., \c H5F_OBJ_FILE
///                         | \c H5F_OBJ_DATASET | \c H5F_OBJ_GROUP
///                         | \c H5F_OBJ_DATATYPE | \c H5F_OBJ_ATTR
///\par
/// Multiple object types can be combined with the logical OR operator (|).
// May 2004
//--------------------------------------------------------------------------
ssize_t
H5File::getObjCount(unsigned types) const
{
    ssize_t num_objs = H5Fget_obj_count(id, types);
    if (num_objs < 0) {
        throw FileIException("H5File::getObjCount", "H5Fget_obj_count failed");
    }
    return (num_objs);
}

//--------------------------------------------------------------------------
// Function:    H5File::getObjIDs
///\brief       Retrieves a list of opened object IDs (files, datasets,
///             groups and datatypes) in the same file.
///\param       types    - Type of object to retrieve the count
///\param       max_objs - Maximum number of object identifiers to place
///                        into obj_id_list.
///\param       oid_list - List of open object identifiers
///\exception   H5::FileIException
///\par Description
///             The valid values for \a types include:
///             \li \c H5F_OBJ_FILE - Files only
///             \li \c H5F_OBJ_DATASET - Datasets only
///             \li \c H5F_OBJ_GROUP - Groups only
///             \li \c H5F_OBJ_DATATYPE - Named datatypes only
///             \li \c H5F_OBJ_ATTR - Attributes only
///             \li \c H5F_OBJ_ALL    - All of the above, i.e., \c H5F_OBJ_FILE
///                     | \c H5F_OBJ_DATASET | \c H5F_OBJ_GROUP
///                     | \c H5F_OBJ_DATATYPE | \c H5F_OBJ_ATTR
///\par
/// Multiple object types can be combined with the logical OR operator (|).
//
// Notes: will do the overload for this one after hearing from Quincey???
// May 2004
//--------------------------------------------------------------------------
void
H5File::getObjIDs(unsigned types, size_t max_objs, hid_t *oid_list) const
{
    ssize_t ret_value = H5Fget_obj_ids(id, types, max_objs, oid_list);
    if (ret_value < 0) {
        throw FileIException("H5File::getObjIDs", "H5Fget_obj_ids failed");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::getVFDHandle
///\brief       Returns the pointer to the file handle of the low-level file
///             driver.
///\param       fapl        - File access property list
///\param       file_handle - Pointer to the file handle being used by
///                           the low-level virtual file driver
///\exception   H5::FileIException
///\par Description
///             For the \c FAMILY or \c MULTI drivers, \a fapl should be
///             defined through the property list functions:
///             \c FileAccPropList::setFamilyOffset for the \c FAMILY driver
///             and \c FileAccPropList::setMultiType for the \c MULTI driver.
///
///             The obtained file handle is dynamic and is valid only while
///             the file remains open; it will be invalid if the file is
///             closed and reopened or opened during a subsequent session.
// May 2004
//--------------------------------------------------------------------------
void
H5File::getVFDHandle(const FileAccPropList &fapl, void **file_handle) const
{
    hid_t  fapl_id   = fapl.getId();
    herr_t ret_value = H5Fget_vfd_handle(id, fapl_id, file_handle);
    if (ret_value < 0) {
        throw FileIException("H5File::getVFDHandle", "H5Fget_vfd_handle failed");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::getVFDHandle
// Purpose      This is an overloaded member function, kept for backward
//              compatibility.  It differs from the above function in that it
//              misses const's.  This wrapper will be removed in future release.
// Param        fapl        - File access property list
// Param        file_handle - Pointer to the file handle being used by
//                            the low-level virtual file driver
// Exception    H5::FileIException
// May 2004
// Modification
//              Planned for removal. -BMR, 2014/04/16
//              Removed from documentation. -BMR, 2016/03/07 1.8.17 and 1.10.0
//              Removed from code. -BMR, 2016/08/11 1.8.18 and 1.10.1
//--------------------------------------------------------------------------
// void H5File::getVFDHandle(FileAccPropList& fapl, void **file_handle) const
//{
//    getVFDHandle((const FileAccPropList)fapl, file_handle);
//}

//--------------------------------------------------------------------------
// Function:    H5File::getVFDHandle
///\brief       This is an overloaded member function, provided for convenience.
///             It differs from the above function only in what arguments it
///             accepts.
///\param       file_handle - Pointer to the file handle being used by
///                     the low-level virtual file driver
///\exception   H5::FileIException
// May 2004
//--------------------------------------------------------------------------
void
H5File::getVFDHandle(void **file_handle) const
{
    herr_t ret_value = H5Fget_vfd_handle(id, H5P_DEFAULT, file_handle);
    if (ret_value < 0) {
        throw FileIException("H5File::getVFDHandle", "H5Fget_vfd_handle failed");
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::getFileSize
///\brief       Returns the file size of the HDF5 file.
///\return      File size
///\exception   H5::FileIException
///\par Description
///             This function is called after an existing file is opened in
///             order to learn the true size of the underlying file.
// Programmer   Raymond Lu - June 24, 2004
//--------------------------------------------------------------------------
hsize_t
H5File::getFileSize() const
{
    hsize_t file_size;
    herr_t  ret_value = H5Fget_filesize(id, &file_size);
    if (ret_value < 0) {
        throw FileIException("H5File::getFileSize", "H5Fget_filesize failed");
    }
    return (file_size);
}

//--------------------------------------------------------------------------
// Function:    H5File::getFileNum
///\brief       Returns the file number of the HDF5 file.
///\return      File number
///\exception   H5::FileIException
///\par Description
///             This function is called after an existing file is opened in
///             order to retrieve the unique 'file number' for the file.
// Programmer   Quincey Koziol - April 13, 2019
//--------------------------------------------------------------------------
unsigned long
H5File::getFileNum() const
{
    unsigned long fileno    = 0;
    herr_t        ret_value = H5Fget_fileno(id, &fileno);
    if (ret_value < 0) {
        throw FileIException("H5File::getFileNum", "H5Fget_fileno failed");
    }
    return (fileno);
}

//--------------------------------------------------------------------------
// Function:    H5File::getId
///\brief       Get the id of this file
///\return      File identifier
// Modification
//      May 2008 - BMR
//              Class hierarchy is revised to address bugzilla 1068.  Class
//              AbstractDS and Attribute are moved out of H5Object.  In
//              addition, member IdComponent::id is moved into subclasses, and
//              IdComponent::getId now becomes pure virtual function.
// May, 2008
//--------------------------------------------------------------------------
hid_t
H5File::getId() const
{
    return (id);
}

#ifndef DOXYGEN_SHOULD_SKIP_THIS
//--------------------------------------------------------------------------
// Function:    H5File::reopen
// Purpose      Reopens this file.
// Exception    H5::FileIException
// Description
//              This function is replaced by the above function reOpen.
// December 2000
//--------------------------------------------------------------------------
void
H5File::reopen()
{
    H5File::reOpen();
}

//--------------------------------------------------------------------------
// Function:    H5File::getLocId
// Purpose      Get the id of this file
// Description
//              This function is a redefinition of CommonFG::getLocId.  It
//              is used by CommonFG member functions to get the file id.
// December 2000
// Deprecated:
//      Aug 18, 2016 -BMR
//              After HDFFV-9920, the Group's methods can use getId() and
//              getLocId() is kept for backward compatibility.
//--------------------------------------------------------------------------
hid_t
H5File::getLocId() const
{
    return (getId());
}

//--------------------------------------------------------------------------
// Function:    H5File::p_setId (protected)
///\brief       Sets the identifier of this object to a new value.
///
///\exception   H5::IdComponentException when the attempt to close the HDF5
///             object fails
// Description
//              The underlaying reference counting in the C library ensures
//              that the current valid id of this object is properly closed.
//              Then the object's id is reset to the new id.
// December 2000
//--------------------------------------------------------------------------
void
H5File::p_setId(const hid_t new_id)
{
    // handling references to this old id
    try {
        close();
    }
    catch (Exception &E) {
        throw FileIException("H5File::p_setId", E.getDetailMsg());
    }
    // reset object's id to the given id
    id = new_id;
}
#endif // DOXYGEN_SHOULD_SKIP_THIS

//--------------------------------------------------------------------------
// Function:    H5File::close
///\brief       Closes this HDF5 file.
///
///\exception   H5::FileIException
// March 2005
//--------------------------------------------------------------------------
void
H5File::close()
{
    if (p_valid_id(id)) {
        herr_t ret_value = H5Fclose(id);
        if (ret_value < 0) {
            throw FileIException("H5File::close", "H5Fclose failed");
        }
        // reset the id
        id = H5I_INVALID_HID;
    }
}

//--------------------------------------------------------------------------
// Function:    H5File::throwException
///\brief       Throws file exception - initially implemented for CommonFG
///\param       func_name - Name of the function where failure occurs
///\param       msg       - Message describing the failure
///\exception   H5::FileIException
// Description
//              This function is also used in H5Location implementation so that
//              proper exception can be thrown for file or group.  The
//              "H5File::" will be inserted to indicate the function called is
//              an implementation of H5File.
// December 2000
//--------------------------------------------------------------------------
void
H5File::throwException(const H5std_string &func_name, const H5std_string &msg) const
{
    H5std_string full_name = func_name;
    full_name.insert(0, "H5File::");
    throw FileIException(full_name, msg);
}

//--------------------------------------------------------------------------
// Function:    H5File destructor
///\brief       Properly terminates access to this file.
// December 2000
// Modification
//              - Replaced resetIdComponent() with decRefCount() to use C
//              library ID reference counting mechanism - BMR, Feb 20, 2005
//              - Replaced decRefCount with close() to let the C library
//              handle the reference counting - BMR, Jun 1, 2006
//--------------------------------------------------------------------------
H5File::~H5File()
{
    try {
        close();
    }
    catch (Exception &close_error) {
        cerr << "H5File::~H5File - " << close_error.getDetailMsg() << endl;
    }
}

} // namespace H5