summaryrefslogtreecommitdiffstats
path: root/src/H5Rpublic.h
blob: 5e349a8391329ce74c85c5e1c83bd2dbc72e2d47 (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
/****************************************************************************
 * NCSA HDF                                                                 *
 * Software Development Group                                               *
 * National Center for Supercomputing Applications                          *
 * University of Illinois at Urbana-Champaign                               *
 * 605 E. Springfield, Champaign IL 61820                                   *
 *                                                                          *
 * For conditions of distribution and use, see the accompanying             *
 * hdf/COPYING file.                                                        *
 *                                                                          *
 ****************************************************************************/

/*
 * This file contains public declarations for the H5S module.
 */
#ifndef _H5Rpublic_H
#define _H5Rpublic_H

/* Public headers needed by this file */
#include <H5public.h>
#include <H5Ipublic.h>

/*
 * Reference types allowed.
 */
typedef enum {
    H5R_BADTYPE     =   (-1),   /*invalid Reference Type                     */
    H5R_OBJECT,                 /*Object reference                           */
    H5R_DATASET_REGION,         /*Dataset Region Reference                   */
    H5R_INTERNAL,               /*Internal Reference                         */
    H5R_MAXTYPE                 /*highest type (Invalid as true type)	     */
} H5R_type_t;

#ifdef LATER
/* Generic reference structure for user's code */
typedef struct {
    unsigned long oid[2];       /* OID of object referenced */
    unsigned long region[2];    /* heap ID of region in object */
    unsigned long file[2];      /* heap ID of external filename */
} href_t;
#endif /* LATER */

/* Note! Be careful with the sizes of the references because they should really
 * depend on the run-time values in the file.  Unfortunately, the arrays need
 * to be defined at run-time, so we have to go with the worst case sizes for
 * them.  -QAK
 */
#define H5R_OBJ_REF_BUF_SIZE    sizeof(hsize_t)
/* Object reference structure for user's code */
typedef struct {
    unsigned char oid[H5R_OBJ_REF_BUF_SIZE];    /* Buffer to store OID of object referenced */
                                /* Needs to be large enough to store largest haddr_t in a worst case machine (ie. 8 bytes currently) */
} hobj_ref_t;

#define H5R_DSET_REG_REF_BUF_SIZE    (sizeof(hsize_t)+sizeof(int))
/* Dataset Region reference structure for user's code */
typedef struct {
    unsigned char heapid[H5R_DSET_REG_REF_BUF_SIZE];    /* Buffer to store heap ID and index */
                                /* Needs to be large enough to store largest haddr_t in a worst case machine (ie. 8 bytes currently) plus an int (4 bytes typically, but could be 8 bytes) */
} hdset_reg_ref_t;

/* Publicly visible datastructures */

#ifdef __cplusplus
extern "C" {
#endif

/* Functions in H5R.c */
HDF5API herr_t H5Rcreate(void *ref, hid_t loc_id, const char *name,
			 H5R_type_t ref_type, hid_t space_id);
HDF5API hid_t H5Rdereference(hid_t dataset, H5R_type_t ref_type, void *ref);
HDF5API hid_t H5Rget_region(hid_t dataset, H5R_type_t ref_type, void *ref);

#ifdef __cplusplus
}
#endif

#endif  /* _H5Rpublic_H */