summaryrefslogtreecommitdiffstats
path: root/src/H5Bprivate.h
blob: a1d84efd1e7633f4d5e2fc8c4541ebb60d3864d1 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * 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.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:		H5Bprivate.h
 *
 * Purpose:		Private non-prototype header.
 *
 *-------------------------------------------------------------------------
 */

#ifndef H5Bprivate_H
#define H5Bprivate_H

/* Private headers needed by this file */
#include "H5private.h"   /* Generic Functions			*/
#include "H5Fprivate.h"  /* File access				*/
#include "H5UCprivate.h" /* Reference counted object functions	*/

/**************************/
/* Library Private Macros */
/**************************/

/*
 * Feature: Define this constant if you want to check B-tree consistency
 *	    after each B-tree operation.  Note that this slows down the
 *	    library considerably! Debugging the B-tree depends on assert()
 *	    being enabled.
 */
#ifdef NDEBUG
#undef H5B_DEBUG
#endif

/****************************/
/* Library Private Typedefs */
/****************************/

/* B-tree IDs for various internal things. */
/* Note - if more of these are added, any 'K' values (for internal or leaf
 * nodes) they use will need to be stored in the file somewhere. -QAK
 */
typedef enum H5B_subid_t {
    H5B_SNODE_ID = 0, /*B-tree is for symbol table nodes	     */
    H5B_CHUNK_ID = 1, /*B-tree is for chunked dataset storage	     */
    H5B_NUM_BTREE_ID  /* Number of B-tree key IDs (must be last)   */
} H5B_subid_t;

/* Define return values from B-tree insertion callbacks */
typedef enum H5B_ins_t {
    H5B_INS_ERROR  = -1, /*error return value			     */
    H5B_INS_NOOP   = 0,  /*insert made no changes		     */
    H5B_INS_LEFT   = 1,  /*insert new node to left of cur node	     */
    H5B_INS_RIGHT  = 2,  /*insert new node to right of cur node	     */
    H5B_INS_CHANGE = 3,  /*change child address for cur node	     */
    H5B_INS_FIRST  = 4,  /*insert first node in (sub)tree	     */
    H5B_INS_REMOVE = 5   /*remove current node			     */
} H5B_ins_t;

/* Enum for specifying the direction of the critical key in relation to the
 * child */
typedef enum H5B_dir_t {
    H5B_LEFT  = 0, /* Critical key is to the left */
    H5B_RIGHT = 1  /* Critical key is to the right */
} H5B_dir_t;

/* Define the operator callback function pointer for H5B_iterate() */
typedef int (*H5B_operator_t)(H5F_t *f, const void *_lt_key, haddr_t addr, const void *_rt_key, void *_udata);

/* Each B-tree has certain information that can be shared across all
 * the instances of nodes in that B-tree.
 */
typedef struct H5B_shared_t {
    const struct H5B_class_t *type;         /* Type of tree */
    unsigned                  two_k;        /* 2*"K" value for tree's nodes */
    size_t                    sizeof_rkey;  /* Size of raw (disk) key */
    size_t                    sizeof_rnode; /* Size of raw (disk) node */
    size_t                    sizeof_keys;  /* Size of native (memory) key node */
    size_t                    sizeof_addr;  /* Size of file address (in bytes) */
    size_t                    sizeof_len;   /* Size of file lengths (in bytes) */
    uint8_t                  *page;         /* Disk page */
    size_t                   *nkey;         /* Offsets of each native key in native key buffer */
    void                     *udata;        /* 'Local' info for a B-tree */
} H5B_shared_t;

/*
 * Each class of object that can be pointed to by a B-link tree has a
 * variable of this type that contains class variables and methods.  Each
 * tree has a K (1/2 rank) value on a per-file basis.  The file_create_parms
 * has an array of K values indexed by the `id' class field below.  The
 * array is initialized with the HDF5_BTREE_K_DEFAULT macro.
 */
typedef struct H5B_class_t {
    H5B_subid_t id;                                     /*id as found in file*/
    size_t      sizeof_nkey;                            /*size of native (memory) key*/
    H5UC_t *(*get_shared)(const H5F_t *, const void *); /*shared info for node */
    herr_t (*new_node)(H5F_t *, H5B_ins_t, void *, void *, void *, haddr_t *);
    int (*cmp2)(void *, void *, void *); /*compare 2 keys */
    int (*cmp3)(void *, void *, void *); /*compare 3 keys */
    htri_t (*found)(H5F_t *, haddr_t, const void *, bool *, void *);

    /* insert new data */
    H5B_ins_t (*insert)(H5F_t *, haddr_t, void *, bool *, void *, void *, void *, bool *, haddr_t *);

    /* min insert uses min leaf, not new(), similarly for max insert */
    bool follow_min;
    bool follow_max;

    /* The direction of the key that is intrinsically associated with each node */
    H5B_dir_t critical_key;

    /* remove existing data */
    H5B_ins_t (*remove)(H5F_t *, haddr_t, void *, bool *, void *, void *, bool *);

    /* encode, decode, debug key values */
    herr_t (*decode)(const H5B_shared_t *, const uint8_t *, void *);
    herr_t (*encode)(const H5B_shared_t *, uint8_t *, const void *);
    herr_t (*debug_key)(FILE *, int, int, const void *, const void *);
} H5B_class_t;

/* Information about B-tree */
typedef struct H5B_info_t {
    hsize_t size;      /* Size of B-tree nodes */
    hsize_t num_nodes; /* Number of B-tree nodes */
} H5B_info_t;

/*****************************/
/* Library-private Variables */
/*****************************/

/***************************************/
/* Library-private Function Prototypes */
/***************************************/
H5_DLL herr_t H5B_create(H5F_t *f, const H5B_class_t *type, void *udata, haddr_t *addr_p /*out*/);
H5_DLL herr_t H5B_find(H5F_t *f, const H5B_class_t *type, haddr_t addr, bool *found, void *udata);
H5_DLL herr_t H5B_insert(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata);
H5_DLL herr_t H5B_iterate(H5F_t *f, const H5B_class_t *type, haddr_t addr, H5B_operator_t op, void *udata);
H5_DLL herr_t H5B_get_info(H5F_t *f, const H5B_class_t *type, haddr_t addr, H5B_info_t *bt_info,
                           H5B_operator_t op, void *udata);
H5_DLL herr_t H5B_remove(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata);
H5_DLL herr_t H5B_delete(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata);
H5_DLL H5B_shared_t *H5B_shared_new(const H5F_t *f, const H5B_class_t *type, size_t sizeof_rkey);
H5_DLL herr_t        H5B_shared_free(void *_shared);
H5_DLL herr_t H5B_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth, const H5B_class_t *type,
                        void *udata);
H5_DLL htri_t H5B_valid(H5F_t *f, const H5B_class_t *type, haddr_t addr);
#endif /* H5Bprivate_H */