/*------------------------------------------------------------------------- * Copyright (C) 1997 National Center for Supercomputing Applications. * All rights reserved. * *------------------------------------------------------------------------- * * Created: H5Gprivate.h * Jul 11 1997 * Robb Matzke * * Purpose: Library-visible declarations. * * Modifications: * *------------------------------------------------------------------------- */ #ifndef _H5Gprivate_H #define _H5Gprivate_H #include /* Private headers needed by this file */ #include #include #include /* * 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; /* * 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? */ 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_loc (hid_t loc_id); herr_t H5G_mkroot (H5F_t *f, H5G_entry_t *root_entry); H5G_entry_t *H5G_entof (H5G_t *grp); H5F_t *H5G_fileof (H5G_t *grp); H5G_t *H5G_create (H5G_t *loc, const char *name, size_t size_hint); H5G_t *H5G_open (H5G_t *loc, const char *name); H5G_t *H5G_reopen (H5G_t *grp); herr_t H5G_close (H5G_t *grp); herr_t H5G_set (H5G_t *grp); herr_t H5G_push (H5G_t *grp); herr_t H5G_pop (H5F_t *f); H5G_t *H5G_getcwg(H5F_t *f); herr_t H5G_link (H5G_t *loc, H5G_link_t type, const char *cur_name, const char *new_name); herr_t H5G_stat (H5G_t *loc, const char *name, hbool_t follow_link, H5G_stat_t *statbuf/*out*/); herr_t H5G_linkval (H5G_t *loc, const char *name, size_t size, char *buf/*out*/); herr_t H5G_insert (H5G_t *cwg, const char *name, H5G_entry_t *ent); herr_t H5G_find (H5G_t *cwg, const char *name, H5G_entry_t *grp_ent/*out*/, H5G_entry_t *ent/*out*/); herr_t H5G_traverse_slink (H5G_entry_t *grp_ent/*in,out*/, H5G_entry_t *obj_ent/*in,out*/, intn *nlinks/*in,out*/); herr_t H5G_ent_encode (H5F_t *f, uint8 **pp, const 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_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, const H5G_entry_t *ent, FILE * stream, intn indent, intn fwidth, const haddr_t *heap); #endif