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/*
* Copyright (C) 1997 National Center for Supercomputing Applications.
* All rights reserved.
*
* 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
#include <H5ACprivate.h>
#include <H5Gprivate.h>
#define H5G_NODE_VERS 1 /*symbol table node version number */
#define H5G_SIZE_HINT 1024 /*default root grp size hint */
#define H5G_NODE_K(F) ((unsigned)((F)->shared->create_parms->sym_leaf_k))
#define H5G_NODE_SIZEOF_HDR(F) (H5G_NODE_SIZEOF_MAGIC + 4)
#define H5G_DEFAULT_ROOT_SIZE 32
/*
* A symbol table node is a collection of symbol table entries. It can
* be thought of as the lowest level of the B-link tree that points to
* a collection of symbol table entries that belong to a specific symbol
* table or group.
*/
typedef struct H5G_node_t {
hbool_t dirty; /*has cache been modified? */
int nsyms; /*number of symbols */
H5G_entry_t *entry; /*array of symbol table entries */
} H5G_node_t;
/*
* Each key field of the B-link tree that points to symbol table
* nodes consists of this structure...
*/
typedef struct H5G_node_key_t {
size_t offset; /*offset into heap for name */
} H5G_node_key_t;
/*
* A group handle passed around through layers of the library within and
* above the H5G layer.
*/
struct H5G_t {
int nref; /*open reference count */
H5G_entry_t ent; /*info about the group */
};
/*
* Each file has a stack of open groups with the latest entry on the
* stack the current working group. If the stack is empty then the
* current working group is the root object.
*/
typedef struct H5G_cwgstk_t {
H5G_t *grp; /*a handle to an open group */
struct H5G_cwgstk_t *next; /*next item (earlier) on stack */
} H5G_cwgstk_t;
/*
* These operations can be passed down from the H5G_stab layer to the
* H5G_node layer through the B-tree layer.
*/
typedef enum H5G_oper_t {
H5G_OPER_FIND = 0, /*find a symbol */
H5G_OPER_INSERT = 1 /*insert a new symbol */
} H5G_oper_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_ud1_t {
/* downward */
H5G_oper_t operation; /*what operation to perform */
const char *name; /*points to temporary memory */
haddr_t heap_addr; /*symbol table heap address */
/* downward for INSERT, upward for FIND */
H5G_entry_t ent; /*entry to insert into table */
} H5G_bt_ud1_t;
/*
* Data exchange structure to pass through the B-tree layer for the
* H5B_iterate function.
*/
typedef struct H5G_bt_ud2_t {
/* downward */
hid_t group_id; /*group id to pass to iteration operator */
struct H5G_t *group; /*the group to which group_id points */
int skip; /*initial entries to skip */
H5G_iterate_t op; /*iteration operator */
void *op_data; /*user-defined operator data */
/* upward */
} H5G_bt_ud2_t;
/*
* This is the class identifier to give to the B-tree functions.
*/
extern H5B_class_t H5B_SNODE[1];
/* The cache subclass */
extern const H5AC_class_t H5AC_SNODE[1];
/*
* 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.
*/
herr_t H5G_stab_create (H5F_t *f, size_t size_hint, H5G_entry_t *ent/*out*/);
herr_t H5G_stab_find (H5G_entry_t *grp_ent, const char *name,
H5G_entry_t *obj_ent/*out*/);
herr_t H5G_stab_insert (H5G_entry_t *grp_ent, const char *name,
H5G_entry_t *obj_ent);
/*
* Functions that understand symbol table entries.
*/
herr_t H5G_ent_decode_vec (H5F_t *f, const uint8 **pp, H5G_entry_t *ent,
intn n);
herr_t H5G_ent_encode_vec (H5F_t *f, uint8 **pp, const H5G_entry_t *ent,
intn n);
#endif
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