summaryrefslogtreecommitdiffstats
path: root/src/H5Bprivate.h
blob: 2290c6a7c8fef90367d05348524b76b7218bc70e (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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:		H5Bprivate.h
 *			Jul 10 1997
 *			Robb Matzke <matzke@llnl.gov>
 *
 * Purpose:		Private non-prototype header.
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */

#ifndef _H5Bprivate_H
#define _H5Bprivate_H

#include "H5Bpublic.h"		/*API prototypes			     */

/* Private headers needed by this file */
#include "H5private.h"		/* Generic Functions			*/
#include "H5ACprivate.h"	/* Metadata cache			*/
#include "H5Fprivate.h"		/* File access				*/
#include "H5FLprivate.h"	/* Free Lists                           */
#include "H5RCprivate.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
#define H5B_MAGIC	"TREE"		/*tree node magic number	     */
#define H5B_SIZEOF_MAGIC 4		/*size of magic number		     */

/* Define return values from operator callback function for H5B_iterate */
/* (Actually, any postive value will cause the iterator to stop and pass back
 *      that positive value to the function that called the iterator)
 */
#define H5B_ITER_ERROR  (-1)
#define H5B_ITER_CONT   (0)
#define H5B_ITER_STOP   (1)

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

/* 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;

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

/* Typedef for B-tree in memory (defined in H5Bpkg.h) */
typedef struct H5B_t H5B_t;

/* 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  */
    uint8_t	        *page;	        /* Disk page */
    size_t              *nkey;          /* Offsets of each native key in native key buffer */
} 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*/
    H5RC_t *    (*get_shared)(const H5F_t*, const void*);    /*shared info for node */
    herr_t	(*new_node)(H5F_t*, hid_t, H5B_ins_t, void*, void*, void*, haddr_t*);
    int         (*cmp2)(H5F_t*, hid_t, void*, void*, void*);	    /*compare 2 keys */
    int         (*cmp3)(H5F_t*, hid_t, void*, void*, void*);	    /*compare 3 keys */
    herr_t	(*found)(H5F_t*, hid_t, haddr_t, const void*, void*);

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

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

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

    /* encode, decode, debug key values */
    herr_t	(*decode)(const H5F_t*, const struct H5B_t*, const uint8_t*, void*);
    herr_t	(*encode)(const H5F_t*, const struct H5B_t*, uint8_t*, void*);
    herr_t	(*debug_key)(FILE*, H5F_t*, hid_t, int, int, const void*, const void*);
} H5B_class_t;

/*****************************/
/* Library-private Variables */
/*****************************/
 
/* Declare a free list to manage the H5B_shared_t struct */
H5FL_EXTERN(H5B_shared_t);


/***************************************/
/* Library-private Function Prototypes */
/***************************************/
H5_DLL size_t H5B_nodesize(const H5F_t *f, const H5B_shared_t *shared,
			   size_t *total_nkey_size);
H5_DLL herr_t H5B_create (H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, void *udata,
			   haddr_t *addr_p/*out*/);
H5_DLL herr_t H5B_find (H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
			 void *udata);
H5_DLL herr_t H5B_insert (H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
                           void *udata);
H5_DLL herr_t H5B_iterate (H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, H5B_operator_t
                            op, haddr_t addr, void *udata);
H5_DLL herr_t H5B_remove(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
			  void *udata);
H5_DLL herr_t H5B_delete(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
                        void *udata);
H5_DLL herr_t H5B_debug (H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream,
			  int indent, int fwidth, const H5B_class_t *type,
			  void *udata);
#endif