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/*-------------------------------------------------------------------------
* Copyright (C) 1997 National Center for Supercomputing Applications.
* All rights reserved.
*
*-------------------------------------------------------------------------
*
* Created: H5Bprivate.h
* Jul 10 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: Private non-prototype header.
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
#ifndef _H5Bprivate_H
#define _H5Bprivate_H
#include "H5Bproto.h" /*API prototypes */
#define H5B_MAGIC "TREE" /* tree node magic number */
#define H5B_HDR_SIZE(F) (8+2*SIZEOF_OFFSET(F))
#define H5B_ANCHOR_LT 0 /* left node is anchored, right is new */
#define H5B_ANCHOR_RT 1 /* right node is anchored, left is new */
/*
* 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.
*/
typedef struct H5B_class_t {
intn id; /*id as found in file */
intn k; /* max children is 2k */
size_t sizeof_nkey; /*size of native (memory) key */
size_t (*get_sizeof_rkey)(hdf5_file_t*);
off_t (*new)(hdf5_file_t*,void*,void*,void*);
intn (*cmp)(hdf5_file_t*,void*,void*,void*);
herr_t (*found)(hdf5_file_t*,off_t,void*,void*,void*);
off_t (*insert)(hdf5_file_t*,off_t,int*,void*,int*,void*,void*,
void*,int*);
herr_t (*list)(hdf5_file_t*,off_t,void*);
void (*decode)(hdf5_file_t*,uint8*,void*);
void (*encode)(hdf5_file_t*,uint8*,void*);
} H5B_class_t;
/*
* The B-tree node as stored in memory...
*/
typedef struct H5B_key_t {
intn dirty; /*native key is more recent than raw key*/
uint8 *rkey; /*ptr into node->page for raw key */
void *nkey; /*null or ptr into node->native for key */
} H5B_key_t;
typedef struct H5B_t {
const H5B_class_t *type; /*type of tree */
size_t sizeof_rkey; /*size of raw (disk) key */
intn dirty; /*something in the tree is dirty */
intn ndirty; /*num child ptrs to emit */
intn level; /*node level */
off_t left; /*address of left sibling */
off_t right; /*address of right sibling */
intn nchildren; /*number of child pointers */
uint8 *page; /*disk page */
uint8 *native; /*array of keys in native format */
H5B_key_t *key; /*2k+1 key entries */
off_t *child; /*2k child pointers */
} H5B_t;
/*
* Library prototypes.
*/
herr_t H5B_debug (hdf5_file_t *f, off_t addr, const H5B_class_t *type);
off_t H5B_new (hdf5_file_t *f, const H5B_class_t *type, size_t sizeof_rkey);
herr_t H5B_find (hdf5_file_t *f, const H5B_class_t *type, off_t addr, void *udata);
off_t H5B_insert (hdf5_file_t *f, const H5B_class_t *type, off_t addr, void *udata);
herr_t H5B_list (hdf5_file_t *f, const H5B_class_t *type, off_t addr, void *udata);
#endif /* !_H5Bprivate_H */
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