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/*-------------------------------------------------------------------------
* Copyright (C) 1997 National Center for Supercomputing Applications.
* All rights reserved.
*
*-------------------------------------------------------------------------
*
* Created: H5Gprivate.h
* Jul 11 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: Library-visible declarations.
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
#ifndef _H5Gprivate_H
#define _H5Gprivate_H
#include <H5Gpublic.h>
/* Private headers needed by this file */
#include <H5private.h>
#include <H5Bprivate.h>
#include <H5Fprivate.h>
/*
* Define this to enable debugging.
*/
#ifdef NDEBUG
# undef H5G_DEBUG
#endif
#define H5G_NODE_MAGIC "SNOD" /*symbol table node magic number */
#define H5G_NODE_SIZEOF_MAGIC 4 /*sizeof symbol node magic number */
#define H5G_NO_CHANGE (-1) /*see H5G_ent_modified() */
/*
* The disk size for a symbol table entry...
*/
#define H5G_SIZEOF_SCRATCH 24
#define H5G_SIZEOF_ENTRY(F) \
(H5F_SIZEOF_SIZE(F) + /*offset of name into heap */ \
H5F_SIZEOF_ADDR(F) + /*address of object header */ \
4 + /*entry type */ \
H5G_SIZEOF_SCRATCH) /*scratch pad space */
/*
* Various types of object header information can be cached in a symbol
* table entry (it's normal home is the object header to which the entry
* points). This datatype determines what (if anything) is cached in the
* symbol table entry.
*/
typedef enum H5G_type_t {
H5G_NOTHING_CACHED =0, /*nothing is cached, must be 0 */
H5G_CACHED_STAB =1, /*symbol table, `stab' */
H5G_NCACHED =2 /*THIS MUST BE LAST */
} H5G_type_t;
/*
* A symbol table entry caches these parameters from object header
* messages... The values are entered into the symbol table when an object
* header is created (by hand) and are extracted from the symbol table with a
* callback function registered in H5O_init_interface(). Be sure to update
* H5G_ent_decode(), H5G_ent_encode(), and H5G_ent_debug() as well.
*/
typedef union H5G_cache_t {
struct {
haddr_t btree_addr; /*file address of symbol table B-tree */
haddr_t heap_addr; /*file address of stab name heap */
} stab;
} H5G_cache_t;
/*
* A symbol table entry. The two important fields are `name_off' and
* `header'. The remaining fields are used for caching information that
* also appears in the object header to which this symbol table entry
* points.
*/
typedef struct H5G_entry_t {
hbool_t dirty; /*entry out-of-date? */
size_t name_off; /*offset of name within name heap */
haddr_t header; /*file address of object header */
H5G_type_t type; /*type of information cached */
H5G_cache_t cache; /*cached data from object header */
H5F_t *file; /*file to which this obj hdr belongs */
} H5G_entry_t;
typedef struct H5G_t H5G_t;
/*
* Library prototypes... These are the ones that other packages routinely
* call.
*/
H5G_t *H5G_create (H5F_t *f, const char *name, size_t size_hint);
H5G_t *H5G_open (H5F_t *f, const char *name);
H5G_t *H5G_reopen (H5G_t *grp);
herr_t H5G_close (H5G_t *grp);
herr_t H5G_set (H5F_t *f, H5G_t *grp);
herr_t H5G_push (H5F_t *f, H5G_t *grp);
herr_t H5G_pop (H5F_t *f);
herr_t H5G_insert (const char *name, H5G_entry_t *ent);
herr_t H5G_find (H5F_t *f, const char *name, H5G_entry_t *grp_ent/*out*/,
H5G_entry_t *ent/*out*/);
herr_t H5G_ent_encode (H5F_t *f, uint8 **pp, H5G_entry_t *ent);
herr_t H5G_ent_decode (H5F_t *f, const uint8 **pp, H5G_entry_t *ent/*out*/);
/*
* These functions operate on symbol table nodes.
*/
herr_t H5G_node_debug (H5F_t *f, const haddr_t *addr, FILE *stream,
intn indent, intn fwidth, const haddr_t *heap);
/*
* These functions operate on symbol table entries. They're used primarily
* in the H5O package where header messages are cached in symbol table
* entries. The subclasses of H5O probably don't need them though.
*/
H5G_entry_t *H5G_ent_calloc (H5G_entry_t *init);
H5G_cache_t *H5G_ent_cache (H5G_entry_t *ent, H5G_type_t *cache_type);
herr_t H5G_ent_modified (H5G_entry_t *ent, H5G_type_t cache_type);
herr_t H5G_ent_debug (H5F_t *f, H5G_entry_t *ent, FILE *stream,
intn indent, intn fwidth);
#endif
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