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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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: H5Gprivate.h
* Jul 11 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: Library-visible declarations.
*
*-------------------------------------------------------------------------
*/
#ifndef _H5Gprivate_H
#define _H5Gprivate_H
/* Include package's public header */
#include "H5Gpublic.h"
/* Private headers needed by this file */
#include "H5private.h" /* Generic Functions */
#include "H5Bprivate.h" /* B-trees */
#include "H5Fprivate.h" /* File access */
#include "H5RSprivate.h" /* Reference-counted strings */
/*
* 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() */
#define H5G_NLINKS 16 /*max symlinks to follow per lookup */
/*
* The disk size for a symbol table entry...
*/
#define H5G_SIZEOF_SCRATCH 16
#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 */ \
4 + /*reserved */ \
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_CACHED_ERROR = -1, /*force enum to be signed */
H5G_NOTHING_CACHED = 0, /*nothing is cached, must be 0 */
H5G_CACHED_STAB = 1, /*symbol table, `stab' */
H5G_CACHED_SLINK = 2, /*symbolic link */
H5G_NCACHED = 3 /*THIS MUST BE LAST */
} H5G_type_t;
/* Type of operation being performed for call to H5G_name_replace() */
typedef enum {
H5G_NAME_MOVE = 0, /* H5*move call */
H5G_NAME_UNLINK, /* H5Gunlink call */
H5G_NAME_MOUNT, /* H5Fmount call */
H5G_NAME_UNMOUNT /* H5Funmount call */
} H5G_names_op_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;
struct {
size_t lval_offset; /*link value offset */
} slink;
} 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? */
H5G_type_t type; /*type of information cached */
H5G_cache_t cache; /*cached data from object header */
size_t name_off; /*offset of name within name heap */
haddr_t header; /*file address of object header */
H5F_t *file; /*file to which this obj hdr belongs */
H5RS_str_t *full_path_r; /* Path to object, as seen from root of current file mounting hierarchy */
H5RS_str_t *user_path_r; /* Path to object, as opened by user */
unsigned obj_hidden; /* Whether the object is visible in group hier. */
} H5G_entry_t;
typedef struct H5G_t H5G_t;
typedef struct H5G_shared_t H5G_shared_t;
/*
* Library prototypes... These are the ones that other packages routinely
* call.
*/
H5_DLL H5G_entry_t *H5G_loc(hid_t loc_id);
H5_DLL herr_t H5G_mkroot(H5F_t *f, hid_t dxpl_id, H5G_entry_t *root_entry);
H5_DLL H5G_entry_t *H5G_entof(H5G_t *grp);
H5_DLL H5F_t *H5G_fileof(H5G_t *grp);
H5_DLL herr_t H5G_free(H5G_t *grp);
H5_DLL H5G_t *H5G_open(H5G_entry_t *ent, hid_t dxpl_id);
H5_DLL herr_t H5G_close(H5G_t *grp);
H5_DLL int H5G_get_type(H5G_entry_t *ent, hid_t dxpl_id);
H5_DLL herr_t H5G_get_objinfo(H5G_entry_t *loc, const char *name,
hbool_t follow_link,
H5G_stat_t *statbuf/*out*/, hid_t dxpl_id);
H5_DLL herr_t H5G_insert(H5G_entry_t *loc, const char *name,
H5G_entry_t *ent, hid_t dxpl_id);
H5_DLL herr_t H5G_find(H5G_entry_t *loc, const char *name,
H5G_entry_t *ent/*out*/, hid_t dxpl_id);
H5_DLL H5F_t *H5G_insertion_file(H5G_entry_t *loc, const char *name, hid_t dxpl_id);
H5_DLL herr_t H5G_free_grp_name(H5G_t *grp);
H5_DLL herr_t H5G_get_shared_count(H5G_t *grp);
H5_DLL herr_t H5G_mount(H5G_t *grp);
H5_DLL herr_t H5G_unmount(H5G_t *grp);
/*
* These functions operate on symbol table nodes.
*/
H5_DLL herr_t H5G_node_init(H5F_t *f);
H5_DLL herr_t H5G_node_close(const H5F_t *f);
H5_DLL herr_t H5G_node_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
int indent, int fwidth, 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.
*/
H5_DLL herr_t H5G_ent_encode(H5F_t *f, uint8_t **pp, const H5G_entry_t *ent);
H5_DLL herr_t H5G_ent_decode(H5F_t *f, const uint8_t **pp,
H5G_entry_t *ent/*out*/);
H5_DLL const H5G_cache_t *H5G_ent_cache(const H5G_entry_t *ent, H5G_type_t *cache_type);
H5_DLL herr_t H5G_ent_copy(H5G_entry_t *dst, const H5G_entry_t *src,
H5_copy_depth_t depth);
H5_DLL herr_t H5G_ent_reset(H5G_entry_t *ent);
H5_DLL herr_t H5G_ent_debug(H5F_t *f, hid_t dxpl_id, const H5G_entry_t *ent, FILE * stream,
int indent, int fwidth, haddr_t heap);
/*
* These functions operate on group hierarchy names.
*/
H5_DLL herr_t H5G_name_free(H5G_entry_t *ent);
H5_DLL herr_t H5G_name_replace(int type, H5G_entry_t *loc,
H5RS_str_t *dst_name, H5G_entry_t *dst_loc, H5G_names_op_t op);
H5_DLL ssize_t H5G_get_name(hid_t id, char *name/*out*/, size_t size);
#endif
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