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/*
* Copyright (C) 1997-2001 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_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 {
H5AC_info_t cache_info; /* Information for H5AC cache functions, _must_ be */
/* first field in structure */
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 */
};
/*
* During name lookups (see H5G_namei()) we sometimes want information about
* a symbolic link or a mount point. The normal operation is to follow the
* symbolic link or mount point and return information about its target.
*/
#define H5G_TARGET_NORMAL 0x0000
#define H5G_TARGET_SLINK 0x0001
#define H5G_TARGET_MOUNT 0x0002
/*
* 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_REMOVE = 2 /*remove existing 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 */
int final_ent; /*final entry looked at */
} H5G_bt_ud2_t;
/*
* This is the class identifier to give to the B-tree functions.
*/
H5_DLLVAR H5B_class_t H5B_SNODE[1];
/* The cache subclass */
H5_DLLVAR 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.
*/
H5_DLL herr_t H5G_stab_create(H5F_t *f, size_t size_hint,
H5G_entry_t *ent/*out*/);
H5_DLL herr_t H5G_stab_find(H5G_entry_t *grp_ent, const char *name,
H5G_entry_t *obj_ent/*out*/);
H5_DLL herr_t H5G_stab_insert(H5G_entry_t *grp_ent, const char *name,
H5G_entry_t *obj_ent);
H5_DLL herr_t H5G_stab_remove(H5G_entry_t *grp_ent, const char *name);
/*
* Functions that understand symbol table entries.
*/
H5_DLL herr_t H5G_ent_decode_vec(H5F_t *f, const uint8_t **pp,
H5G_entry_t *ent, int n);
H5_DLL herr_t H5G_ent_encode_vec(H5F_t *f, uint8_t **pp,
const H5G_entry_t *ent, int n);
/* Functions that understand symbol table nodes */
H5_DLL unsigned H5G_node_k(const H5F_t *f);
H5_DLL herr_t H5G_node_iterate (H5F_t *f, void UNUSED *_lt_key, haddr_t addr,
void UNUSED *_rt_key, void *_udata);
#endif
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