summaryrefslogtreecommitdiffstats
path: root/src/H5Gpkg.h
blob: b3dc299f774e81ddb421a2041271ada87ec82d80 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
 * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Programmer: Robb Matzke <matzke@llnl.gov>
 *             Thursday, September 18, 1997
 *
 * Purpose:     This file contains declarations which are visible
 *              only within the H5G package. Source files outside the
 *              H5G package should include H5Gprivate.h instead.
 */
#ifndef H5G_PACKAGE
#error "Do not include this file outside the H5G package!"
#endif

#ifndef _H5Gpkg_H
#define _H5Gpkg_H

/* Get package's private header */
#include "H5Gprivate.h"

/* Other private headers needed by this file */
#include "H5ACprivate.h"	/* Metadata cache			*/
#include "H5B2private.h"	/* v2 B-trees				*/
#include "H5HFprivate.h"	/* Fractal heaps			*/
#include "H5Oprivate.h"		/* Object headers		  	*/
#include "H5SLprivate.h"	/* Skip lists				*/

/**************************/
/* Package Private Macros */
/**************************/

/* Standard length of fractal heap ID for link */
#define H5G_DENSE_FHEAP_ID_LEN  7

/*
 * During name lookups (see H5G_traverse()) we sometimes want information about
 * a symbolic link or a mount point.  The normal operation is to follow the
 * symbolic link or mount point and return information about its target.
 */
#define H5G_TARGET_NORMAL	0x0000
#define H5G_TARGET_SLINK	0x0001
#define H5G_TARGET_MOUNT	0x0002
#define H5G_TARGET_UDLINK	0x0004
#define H5G_CRT_INTMD_GROUP	0x0008

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

/*
 * Various types of object header information can be cached in a symbol
 * table entry (it's normal home is the object header to which the entry
 * points).  This datatype determines what (if anything) is cached in the
 * symbol table entry.
 */
typedef enum H5G_type_t {
    H5G_CACHED_ERROR	= -1, 	/*force enum to be signed		     */
    H5G_NOTHING_CACHED  = 0,    /*nothing is cached, must be 0               */
    H5G_CACHED_STAB     = 1,    /*symbol table, `stab'                       */
    H5G_CACHED_SLINK	= 2, 	/*symbolic link				     */

    H5G_NCACHED                 /*THIS MUST BE LAST                          */
} H5G_type_t;

/*
 * A symbol table entry caches these parameters from object header
 * messages...  The values are entered into the symbol table when an object
 * header is created (by hand) and are extracted from the symbol table with a
 * callback function registered in H5O_init_interface().  Be sure to update
 * H5G_ent_decode(), H5G_ent_encode(), and H5G_ent_debug() as well.
 */
typedef union H5G_cache_t {
    struct {
        haddr_t btree_addr;             /*file address of symbol table B-tree*/
        haddr_t heap_addr;              /*file address of stab name heap     */
    } stab;

    struct {
	size_t	lval_offset;		/*link value offset		     */
    } slink;
} H5G_cache_t;

/*
 * A symbol table entry.  The two important fields are `name_off' and
 * `header'.  The remaining fields are used for caching information that
 * also appears in the object header to which this symbol table entry
 * points.
 */
typedef struct H5G_entry_t {
    hbool_t     dirty;                  /*entry out-of-date?                 */
    H5G_type_t  type;                   /*type of information cached         */
    H5G_cache_t cache;                  /*cached data from object header     */
    size_t      name_off;               /*offset of name within name heap    */
    haddr_t     header;                 /*file address of object header      */
    H5F_t       *file;                  /*file to which this obj hdr belongs */
} H5G_entry_t;

/*
 * Shared information for all open group objects
 */
struct H5G_shared_t {
    int fo_count;                   /* open file object count */
    hbool_t mounted;                /* Group is mount point */
};

/*
 * A group handle passed around through layers of the library within and
 * above the H5G layer.
 */
struct H5G_t {
    H5G_shared_t *shared;               /* Shared file object data */
    H5O_loc_t oloc;                     /* Object location for group */
    H5G_name_t path;                    /* Group hierarchy path   */
};

/* Link iteration operator for internal library callbacks */
typedef herr_t (*H5G_lib_iterate_t)(const H5O_link_t *lnk, void *op_data);

/* Some syntactic sugar to make the compiler happy with two different kinds of iterator callbacks */
typedef union {
    H5G_iterate_t app_op;           /* Application callback for each link */
    H5G_lib_iterate_t lib_op;       /* Library internal callback for each link */
} H5G_link_iterate_t;

/*
 * Common data exchange structure for symbol table nodes.  This structure is
 * passed through the B-link tree layer to the methods for the objects
 * to which the B-link tree points.
 */
typedef struct H5G_bt_ud_common_t {
    /* downward */
    const char  *name;                  /*points to temporary memory         */
    haddr_t     heap_addr;              /*symbol table heap address          */
} H5G_bt_ud_common_t;

/*
 * Data exchange structure for symbol table nodes.  This structure is
 * passed through the B-link tree layer to the methods for the objects
 * to which the B-link tree points for operations which require no
 * additional information.
 *
 * (Just an alias for the "common" info).
 */
typedef H5G_bt_ud_common_t H5G_bt_ud0_t;

/*
 * Data exchange structure for symbol table nodes.  This structure is
 * passed through the B-link tree layer to the insert method for entries.
 */
typedef struct H5G_bt_ud1_t {
    /* downward */
    H5G_bt_ud_common_t common;          /* Common info for B-tree user data (must be first) */
    const H5O_link_t *lnk;              /* Link to insert into table         */
} H5G_bt_ud1_t;

/*
 * Data exchange structure for symbol table nodes.  This structure is
 * passed through the B-link tree layer to the methods for the objects
 * to which the B-link tree points.
 */
typedef struct H5G_bt_ud2_t {
    /* downward */
    H5G_bt_ud_common_t common;          /* Common info for B-tree user data (must be first) */
    hbool_t adj_link;                   /* Whether to adjust the link count on objects */

    /* upward */
    H5G_obj_t    *obj_type;             /*member type to be returned                 */
} H5G_bt_ud2_t;

/* Typedef for B-tree 'find' operation */
typedef herr_t (*H5G_bt_find_op_t)(const H5G_entry_t *ent/*in*/, void *operator_data/*in,out*/);

/*
 * Data exchange structure for symbol table nodes.  This structure is
 * passed through the B-link tree layer to the 'find' method for entries.
 */
typedef struct H5G_bt_ud3_t {
    /* downward */
    H5G_bt_ud_common_t common;          /* Common info for B-tree user data (must be first) */
    H5G_bt_find_op_t op;                /* Operator to call when correct entry is found */
    void *op_data;                      /* Data to pass to operator */

    /* upward */
} H5G_bt_ud3_t;

/*
 * Data exchange structure to pass through the B-tree layer for the
 * H5B_iterate function.
 */
typedef struct H5G_bt_it_ud1_t {
    /* downward */
    hid_t	group_id;	/*group id to pass to iteration operator     */
    haddr_t     heap_addr;      /*symbol table heap address                  */
    H5G_link_iterate_t op;	/*iteration operator			     */
    void	*op_data;	/*user-defined operator data		     */
    int		skip;		/*initial entries to skip		     */
    hbool_t     lib_internal;   /* Callback is library internal              */

    /* upward */
    int		*final_ent;	/*final entry looked at                      */
} H5G_bt_it_ud1_t;

/* Data passed through B-tree iteration for copying copy symbol table content */
typedef struct H5G_bt_it_cpy_t {
    const H5O_loc_t *src_oloc;  /* Source object location */
    haddr_t     src_heap_addr;  /* Heap address of the source symbol table  */
    H5F_t       *dst_file;      /* File of destination group */
    H5O_stab_t  *dst_stab;      /* Symbol table message for destination group */
    H5O_copy_t  *cpy_info;      /* Information for copy operation */
} H5G_bt_it_cpy_t;

/* Common information for "by index" lookups in symbol tables */
typedef struct H5G_bt_it_idx_common_t {
    /* downward */
    H5F_t       *f;             /* Pointer to file that symbol table is in */
    hid_t       dxpl_id;        /* DXPL for operation */
    hsize_t     idx;            /* Index of group member to be queried */
    hsize_t     num_objs;       /* The number of objects having been traversed */
    H5G_bt_find_op_t op;        /* Operator to call when correct entry is found */
} H5G_bt_it_idx_common_t;

/* Data passed through B-tree iteration for looking up a name by index */
typedef struct H5G_bt_it_idx1_t {
    /* downward */
    H5G_bt_it_idx_common_t common; /* Common information for "by index" lookup  */
    haddr_t     heap_addr;      /*symbol table heap address                  */

    /* upward */
    char         *name;         /*member name to be returned                 */
} H5G_bt_it_idx1_t;

/* Data passed through B-tree iteration for looking up a type by index */
typedef struct H5G_bt_it_idx2_t {
    /* downward */
    H5G_bt_it_idx_common_t common; /* Common information for "by index" lookup  */

    /* upward */
    H5G_obj_t    type;          /*member type to be returned                 */
} H5G_bt_it_idx2_t;

/* Data passed through B-tree iteration for looking up a link by index */
typedef struct H5G_bt_it_idx3_t {
    /* downward */
    H5G_bt_it_idx_common_t common; /* Common information for "by index" lookup  */
    haddr_t     heap_addr;      /*symbol table heap address                  */

    /* upward */
    H5O_link_t *lnk;            /*link to be returned                        */
    hbool_t     found;      	/*whether we found the link                  */
} H5G_bt_it_idx3_t;

/* Typedefs for "new format" groups */
/* (fractal heap & v2 B-tree info) */

/* Typedef for native 'name' field index records in the v2 B-tree */
/* (Keep 'id' field first so generic record handling in callbacks works) */
typedef struct H5G_dense_bt2_name_rec_t {
    uint8_t id[H5G_DENSE_FHEAP_ID_LEN]; /* Heap ID for link */
    uint32_t hash;                      /* Hash of 'name' field value */
} H5G_dense_bt2_name_rec_t;

/* Typedef for native 'creation order' field index records in the v2 B-tree */
/* (Keep 'id' field first so generic record handling in callbacks works) */
typedef struct H5G_dense_bt2_corder_rec_t {
    uint8_t id[H5G_DENSE_FHEAP_ID_LEN]; /* Heap ID for link */
    int64_t corder;                     /* 'creation order' field value */
} H5G_dense_bt2_corder_rec_t;

/*
 * Common data exchange structure for dense link storage.  This structure is
 * passed through the v2 B-tree layer to the methods for the objects
 * to which the v2 B-tree points.
 */
typedef struct H5G_bt2_ud_common_t {
    /* downward */
    H5F_t       *f;                     /* Pointer to file that fractal heap is in */
    hid_t       dxpl_id;                /* DXPL for operation                */
    H5HF_t      *fheap;                 /* Fractal heap handle               */
    const char  *name;                  /* Name of link to compare           */
    uint32_t    name_hash;              /* Hash of name of link to compare   */
    int64_t     corder;                 /* Creation order value of link to compare   */
    H5B2_found_t found_op;              /* Callback when correct link is found */
    void        *found_op_data;         /* Callback data when correct link is found */
} H5G_bt2_ud_common_t;

/*
 * Data exchange structure for dense link storage.  This structure is
 * passed through the v2 B-tree layer when inserting links.
 */
typedef struct H5G_bt2_ud_ins_t {
    /* downward */
    H5G_bt2_ud_common_t common;         /* Common info for B-tree user data (must be first) */
    uint8_t id[H5G_DENSE_FHEAP_ID_LEN]; /* Heap ID of link to insert         */
} H5G_bt2_ud_ins_t;

/* Typedef for path traversal operations */
/* grp_loc is the location of the group in which the targeted object is located.
 * name is the last component of the object's name
 * lnk is the link between the group and the object
 * obj_loc is the target of the traversal (or NULL if the object doesn't exist)
 * operator_data is whatever udata was supplied when H5G_traverse was called
 * own_loc should be set to H5G_OWN_OBJ_LOC if this callback takes ownership of obj_loc,
 * H5G_OWN_GRP_LOC if it takes ownership of grp_loc, and H5G_OWN_NONE if obj_loc and
 * grp_loc need to be deleted.
 */
typedef herr_t (*H5G_traverse_t)(H5G_loc_t *grp_loc/*in*/, const char *name,
    const H5O_link_t *lnk/*in*/, H5G_loc_t *obj_loc/*out*/, void *operator_data/*in,out*/,
    H5G_own_loc_t *own_loc/*out*/);

/* Data structure to hold table of links for a group */
typedef struct {
    size_t      nlinks;         /* # of links in table */
    H5O_link_t *lnks;           /* Pointer to array of links */
} H5G_link_table_t;

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

/*
 * This is the class identifier to give to the B-tree functions.
 */
H5_DLLVAR H5B_class_t H5B_SNODE[1];

/* The cache subclass */
H5_DLLVAR const H5AC_class_t H5AC_SNODE[1];

/* The v2 B-tree class for indexing 'name' field on links */
H5_DLLVAR const H5B2_class_t H5G_BT2_NAME[1];

/* The v2 B-tree class for indexing 'creation order' field on links */
H5_DLLVAR const H5B2_class_t H5G_BT2_CORDER[1];

/*
 * Utility functions
 */
H5_DLL herr_t H5G_init(void);
H5_DLL char * H5G_normalize(const char *name);
H5_DLL const char * H5G_component(const char *name, size_t *size_p);
H5_DLL herr_t H5G_traverse_term_interface(void);
H5_DLL herr_t H5G_traverse(const H5G_loc_t *loc, const char *name,
    unsigned target, H5G_traverse_t op, void *op_data, hid_t lapl_id,
    hid_t dxpl_id);

/******************************/
/* Package Private Prototypes */
/******************************/

/*
 * Functions that understand symbol tables but not names.  The
 * functions that understand names are exported to the rest of
 * the library and appear in H5Gprivate.h.
 */
H5_DLL herr_t H5G_stab_create(H5O_loc_t *grp_oloc, hid_t dxpl_id,
    const H5O_ginfo_t *ginfo, H5O_stab_t *stab);
H5_DLL herr_t H5G_stab_create_components(H5F_t *f, H5O_stab_t *stab, size_t size_hint, hid_t dxpl_id);
H5_DLL herr_t H5G_stab_insert(H5O_loc_t *grp_oloc, const char *name,
    H5O_link_t *obj_lnk, hid_t dxpl_id);
H5_DLL herr_t H5G_stab_insert_real(H5F_t *f, H5O_stab_t *stab, const char *name,
    H5O_link_t *obj_lnk, hid_t dxpl_id);
H5_DLL herr_t H5G_stab_delete(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab, hbool_t adj_link);
H5_DLL herr_t H5G_stab_iterate(H5O_loc_t *oloc, H5_iter_order_t order,
    hid_t gid, hbool_t lib_internal, int skip, int *last_obj,
    H5G_link_iterate_t op, void *op_data, hid_t dxpl_id);
H5_DLL herr_t H5G_stab_count(struct H5O_loc_t *oloc, hsize_t *num_objs, hid_t dxpl_id);
H5_DLL ssize_t H5G_stab_get_name_by_idx(H5O_loc_t *oloc, H5_iter_order_t order,
    hsize_t n, char* name, size_t size, hid_t dxpl_id);
H5_DLL H5G_obj_t H5G_stab_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx,
    hid_t dxpl_id);
H5_DLL herr_t H5G_stab_remove(H5O_loc_t *oloc, const char *name,
    H5G_obj_t *obj_type, hid_t dxpl_id);
H5_DLL herr_t H5G_stab_lookup(H5O_loc_t *grp_oloc, const char *name,
    H5O_link_t *lnk, hid_t dxpl_id);
H5_DLL herr_t H5G_stab_lookup_by_idx(H5O_loc_t *grp_oloc, H5_iter_order_t order,
    hsize_t n, H5O_link_t *lnk, hid_t dxpl_id);

/*
 * Functions that understand symbol table entries.
 */
H5_DLL herr_t H5G_ent_copy(H5G_entry_t *dst, const H5G_entry_t *src,
            H5_copy_depth_t depth);
H5_DLL herr_t H5G_ent_reset(H5G_entry_t *ent);
H5_DLL herr_t H5G_ent_decode_vec(H5F_t *f, const uint8_t **pp,
				  H5G_entry_t *ent, unsigned n);
H5_DLL herr_t H5G_ent_encode_vec(H5F_t *f, uint8_t **pp,
				  const H5G_entry_t *ent, unsigned n);
H5_DLL herr_t H5G_ent_convert(H5F_t *f, haddr_t heap_addr, const char *name,
    const H5O_link_t *lnk, H5G_entry_t *ent, hid_t dxpl_id);
H5_DLL herr_t H5G_ent_debug(H5F_t *f, hid_t dxpl_id, const H5G_entry_t *ent, FILE * stream,
			     int indent, int fwidth, haddr_t heap);

/* Functions that understand symbol table nodes */
H5_DLL herr_t H5G_node_init(H5F_t *f);
H5_DLL int H5G_node_iterate(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
		     const void *_rt_key, void *_udata);
H5_DLL int H5G_node_sumup(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
		     const void *_rt_key, void *_udata);
H5_DLL int H5G_node_by_idx(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
		     const void *_rt_key, void *_udata);
H5_DLL int H5G_node_copy(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
		     const void *_rt_key, void *_udata);

/* Functions that understand links in groups */
H5_DLL int H5G_link_cmp_name_inc(const void *lnk1, const void *lnk2);
H5_DLL int H5G_link_cmp_name_dec(const void *lnk1, const void *lnk2);
H5_DLL int H5G_link_cmp_corder_inc(const void *lnk1, const void *lnk2);
H5_DLL int H5G_link_cmp_corder_dec(const void *lnk1, const void *lnk2);
H5_DLL herr_t H5G_link_convert(H5F_t *f, hid_t dxpl_id, H5O_link_t *lnk,
    haddr_t lheap_addr, const H5G_entry_t *ent, const char *name);
H5_DLL herr_t H5G_link_copy_file(H5F_t *dst_file, hid_t dxpl_id,
    const H5O_link_t *_src_lnk, const H5O_loc_t *src_oloc, H5O_link_t *dst_lnk,
    H5O_copy_t *cpy_info);
H5_DLL herr_t H5G_link_release_table(H5G_link_table_t *ltable);

/* Functions that understand "compact" link storage */
H5_DLL herr_t H5G_compact_insert(H5O_loc_t *grp_oloc, H5O_link_t *obj_lnk,
    hid_t dxpl_id);
H5_DLL ssize_t H5G_compact_get_name_by_idx(H5O_loc_t *oloc, hid_t dxpl_id,
    const H5O_linfo_t *linfo, H5L_index_t idx_type, H5_iter_order_t order,
    hsize_t idx, char *name, size_t size);
H5_DLL H5G_obj_t H5G_compact_get_type_by_idx(H5O_loc_t *oloc, hid_t dxpl_id,
    const H5O_linfo_t *linfo, hsize_t idx);
H5_DLL herr_t H5G_compact_remove(const H5O_loc_t *oloc, const char *name,
    H5G_obj_t *obj_type, hid_t dxpl_id);
H5_DLL herr_t H5G_compact_iterate(H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t *linfo, 
    H5_iter_order_t order, hid_t gid, hbool_t lib_internal, int skip,
    int *last_obj, H5G_link_iterate_t op, void *op_data);
H5_DLL herr_t H5G_compact_lookup(H5O_loc_t *grp_oloc, const char *name,
    H5O_link_t *lnk, hid_t dxpl_id);
H5_DLL herr_t H5G_compact_lookup_by_idx(H5O_loc_t *oloc, hid_t dxpl_id,
    const H5O_linfo_t *linfo, H5L_index_t idx_type, H5_iter_order_t order,
    hsize_t n, H5O_link_t *lnk);

/* Functions that understand "dense" link storage */
H5_DLL herr_t H5G_dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
    H5L_index_t idx_type, H5_iter_order_t order, H5G_link_table_t *ltable);
H5_DLL herr_t H5G_dense_create(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo);
H5_DLL herr_t H5G_dense_insert(H5F_t *f, hid_t dxpl_id,
    const H5O_linfo_t *linfo, const H5O_link_t *lnk);
H5_DLL herr_t H5G_dense_lookup(H5F_t *f, hid_t dxpl_id,
    const H5O_linfo_t *linfo, const char *name, H5O_link_t *lnk);
H5_DLL herr_t H5G_dense_lookup_by_idx(H5F_t *f, hid_t dxpl_id,
    const H5O_linfo_t *linfo, H5L_index_t idx_type, H5_iter_order_t order,
    hsize_t n, H5O_link_t *lnk);
H5_DLL herr_t H5G_dense_iterate(H5F_t *f, hid_t dxpl_id, H5_iter_order_t order,
    hid_t gid, const H5O_linfo_t *linfo, hbool_t lib_internal, int skip,
    int *last_lnk, H5G_link_iterate_t op, void *op_data);
H5_DLL ssize_t H5G_dense_get_name_by_idx(H5F_t  *f, hid_t dxpl_id,
    H5O_linfo_t *linfo, H5L_index_t idx_type, H5_iter_order_t order, hsize_t n,
    char *name, size_t size);
H5_DLL H5G_obj_t H5G_dense_get_type_by_idx(H5F_t  *f, hid_t dxpl_id,
    H5O_linfo_t *linfo, hsize_t idx);
H5_DLL herr_t H5G_dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
    const char *name, H5G_obj_t *obj_type);
H5_DLL herr_t H5G_dense_delete(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
    hbool_t adj_link);

/* Functions that understand group objects */
H5_DLL herr_t H5G_obj_create(H5F_t *f, hid_t dxpl_id, const H5O_ginfo_t *ginfo,
    const H5O_linfo_t *linfo, H5O_loc_t *oloc/*out*/);
H5_DLL herr_t H5G_obj_insert(H5O_loc_t *grp_oloc, const char *name,
    H5O_link_t *obj_lnk, hbool_t adj_link, hid_t dxpl_id);
H5_DLL herr_t H5G_obj_iterate(hid_t loc_id, const char *name,
    H5_iter_order_t order, int skip, int *last_obj, H5G_iterate_t op,
    void *op_data, hid_t dxpl_id);
H5_DLL herr_t H5G_obj_count(struct H5O_loc_t *oloc, hsize_t *num_objs,
    hid_t dxpl_id);
H5_DLL ssize_t H5G_obj_get_name_by_idx(H5O_loc_t *oloc, H5L_index_t idx_type,
    H5_iter_order_t order, hsize_t n, char* name, size_t size, hid_t dxpl_id);
H5_DLL H5G_obj_t H5G_obj_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx,
    hid_t dxpl_id);
H5_DLL herr_t H5G_obj_remove(H5O_loc_t *oloc, const char *name,
    H5G_obj_t *obj_type, hid_t dxpl_id);
H5_DLL herr_t H5G_obj_lookup(H5O_loc_t *grp_oloc, const char *name,
    H5O_link_t *lnk, hid_t dxpl_id);
H5_DLL herr_t H5G_obj_lookup_by_idx(H5O_loc_t *grp_oloc, H5L_index_t idx_type,
    H5_iter_order_t order, hsize_t n, H5O_link_t *lnk, hid_t dxpl_id);

/*
 * These functions operate on group hierarchy names.
 */
H5_DLL herr_t H5G_name_init(H5G_name_t *name, const char *path);
H5_DLL herr_t H5G_name_set(H5G_name_t *loc, H5G_name_t *obj, const char *name);

/*
 * These functions operate on group "locations"
 */
H5_DLL herr_t H5G_loc_copy(H5G_loc_t *dst, H5G_loc_t *src, H5_copy_depth_t depth);
H5_DLL herr_t H5G_loc_insert(H5G_loc_t *grp_loc, const char *name,
    H5G_loc_t *obj_loc, hid_t dxpl_id);
H5_DLL herr_t H5G_loc_exists(const H5G_loc_t *loc, const char *name, hid_t dxpl_id);
H5_DLL herr_t H5G_loc_remove(H5G_loc_t *grp_loc, const char *name,
    H5G_loc_t *obj_loc, hid_t dxpl_id);

/* Testing functions */
#ifdef H5G_TESTING
H5_DLL htri_t H5G_is_empty_test(hid_t gid);
H5_DLL htri_t H5G_has_links_test(hid_t gid, unsigned *nmsgs);
H5_DLL htri_t H5G_has_stab_test(hid_t gid);
H5_DLL htri_t H5G_is_new_dense_test(hid_t gid);
H5_DLL herr_t H5G_new_dense_info_test(hid_t gid, hsize_t *name_count, hsize_t *corder_count);
H5_DLL herr_t H5G_lheap_size_test(hid_t gid, size_t *lheap_size);
H5_DLL herr_t H5G_user_path_test(hid_t obj_id, char *user_path, size_t *user_path_len, unsigned *user_path_hidden);
#endif /* H5G_TESTING */

#endif /* _H5Gpkg_H */