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/*-------------------------------------------------------------------------
* Copyright (C) 1997 National Center for Supercomputing Applications.
* All rights reserved.
*
*-------------------------------------------------------------------------
*
* Created: H5Oprivate.h
* Aug 5 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: Object header private include file.
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
#ifndef _H5Oprivate_H
#define _H5Oprivate_H
#include <H5Opublic.h>
/* Private headers needed by this file */
#include <H5private.h>
#include <H5Fprivate.h>
#include <H5Gprivate.h>
#include <H5HGprivate.h>
#include <H5Tprivate.h>
#include <H5Sprivate.h>
/*
* Align messages on 8-byte boundaries because we would like to copy the
* object header chunks directly into memory and operate on them there, even
* on 64-bit architectures. This allows us to reduce the number of disk I/O
* requests with a minimum amount of mem-to-mem copies.
*/
#define H5O_ALIGN(X) (8*(((X)+8-1)/8))
#define H5O_MIN_SIZE H5O_ALIGN(32) /*min obj header data size */
#define H5O_NMESGS 32 /*initial number of messages */
#define H5O_NCHUNKS 8 /*initial number of chunks */
#define H5O_NEW_MESG (-1) /*new message */
#define H5O_ALL (-1) /*delete all messages of type */
/* Flags which are part of a message */
#define H5O_FLAG_CONSTANT 0x01
#define H5O_FLAG_SHARED 0x02
#define H5O_FLAG_BITS 0x03
#define H5O_VERSION 1
/*
* Size of object header header.
*/
#define H5O_SIZEOF_HDR(F) \
H5O_ALIGN(1 + /*version number */ \
1 + /*alignment */ \
2 + /*number of messages */ \
4 + /*reference count */ \
4) /*header data size */
/*
* Size of message header
*/
#define H5O_SIZEOF_MSGHDR(F) \
H5O_ALIGN(2 + /*message type */ \
2 + /*sizeof message data */ \
4) /*reserved */
typedef struct H5O_class_t {
intn id; /*message type ID on disk */
const char *name; /*for debugging */
size_t native_size; /*size of native message */
void *(*decode)(H5F_t*, const uint8*, H5HG_t*);
herr_t (*encode)(H5F_t*, uint8*, const void*);
void *(*copy)(const void*, void*); /*copy native value */
size_t (*raw_size)(H5F_t*, const void*);/*sizeof raw val */
herr_t (*reset)(void *); /*free nested data structs */
herr_t (*share)(H5F_t*, const void*, H5HG_t*);
herr_t (*debug)(H5F_t*, const void*, FILE*, intn, intn);
} H5O_class_t;
typedef struct H5O_mesg_t {
const H5O_class_t *type; /*type of message */
hbool_t dirty; /*raw out of date wrt native */
uint8 flags; /*message flags */
void *native; /*native format message */
uint8 *raw; /*ptr to raw data */
size_t raw_size; /*size with alignment */
intn chunkno; /*chunk number for this mesg */
} H5O_mesg_t;
typedef struct H5O_chunk_t {
hbool_t dirty; /*dirty flag */
haddr_t addr; /*chunk file address */
size_t size; /*chunk size */
uint8 *image; /*image of file */
} H5O_chunk_t;
typedef struct H5O_t {
hbool_t dirty; /*out of data wrt disk */
intn version; /*version number */
intn nlink; /*link count */
intn nmesgs; /*number of messages */
intn alloc_nmesgs; /*number of message slots */
H5O_mesg_t *mesg; /*array of messages */
intn nchunks; /*number of chunks */
intn alloc_nchunks; /*chunks allocated */
H5O_chunk_t *chunk; /*array of chunks */
} H5O_t;
/*
* Null Message.
*/
#define H5O_NULL_ID 0x0000
extern const H5O_class_t H5O_NULL[1];
/*
* Simple Data Space Message.
*/
#define H5O_SDSPACE_ID 0x0001
extern const H5O_class_t H5O_SDSPACE[1];
/* operates on an H5S_simple_t struct */
/*
* Data Type Message.
*/
#define H5O_DTYPE_ID 0x0003
extern const H5O_class_t H5O_DTYPE[1];
/* operates on an H5T_t struct */
/*
* External File List Message
*/
#define H5O_EFL_ID 0x0007 /*external file list id */
#define H5O_EFL_ALLOC 16 /*number of slots to alloc at once */
#define H5O_EFL_UNLIMITED H5F_UNLIMITED /*max possible file size */
extern const H5O_class_t H5O_EFL[1]; /*external file list class */
typedef struct H5O_efl_entry_t {
size_t name_offset; /*offset of name within heap */
char *name; /*malloc'd name */
size_t offset; /*offset of data within file */
size_t size; /*size allocated within file */
} H5O_efl_entry_t;
typedef struct H5O_efl_t {
haddr_t heap_addr; /*address of name heap */
uintn nalloc; /*number of slots allocated */
uintn nused; /*number of slots used */
H5O_efl_entry_t *slot; /*array of external file entries */
} H5O_efl_t;
/*
* Data Layout Message
*/
#define H5O_LAYOUT_ID 0x0008
#define H5O_LAYOUT_NDIMS 32
extern const H5O_class_t H5O_LAYOUT[1];
typedef struct H5O_layout_t {
int type; /*type of layout, H5D_layout_t */
haddr_t addr; /*file address of data or B-tree */
uintn ndims; /*num dimensions in stored data */
size_t dim[H5O_LAYOUT_NDIMS]; /*size of data or chunk */
} H5O_layout_t;
/*
* Object name message.
*/
#define H5O_NAME_ID 0x000d
extern const H5O_class_t H5O_NAME[1];
typedef struct H5O_name_t {
char *s; /*ptr to malloc'd memory */
} H5O_name_t;
/*
* Shared object message. This message ID never really appears in an object
* header. Instead, bit 2 of the `Flags' field will be set and the ID field
* will be the ID of the pointed-to message.
*/
#define H5O_SHARED_ID 0x000f
extern const H5O_class_t H5O_SHARED[1];
typedef H5HG_t H5O_shared_t;
/*
* Object header continuation message.
*/
#define H5O_CONT_ID 0x0010
extern const H5O_class_t H5O_CONT[1];
typedef struct H5O_cont_t {
haddr_t addr; /*address of continuation block */
size_t size; /*size of continuation block */
/* the following field(s) do not appear on disk */
intn chunkno; /*chunk this mesg refers to */
} H5O_cont_t;
/*
* Symbol table message.
*/
#define H5O_STAB_ID 0x0011
extern const H5O_class_t H5O_STAB[1];
void *H5O_stab_fast (const H5G_cache_t *cache, const H5O_class_t *type,
void *_mesg);
typedef struct H5O_stab_t {
haddr_t btree_addr; /*address of B-tree */
haddr_t heap_addr; /*address of name heap */
} H5O_stab_t;
/* General message operators */
herr_t H5O_create (H5F_t *f, size_t size_hint, H5G_entry_t *ent/*out*/);
herr_t H5O_open (H5G_entry_t *ent);
herr_t H5O_close (H5G_entry_t *ent);
intn H5O_link (H5G_entry_t *ent, intn adjust);
void *H5O_read (H5G_entry_t *ent, const H5O_class_t *type, intn sequence,
void *mesg);
intn H5O_modify (H5G_entry_t *ent, const H5O_class_t *type, intn overwrite,
uintn flags, const void *mesg);
herr_t H5O_remove (H5G_entry_t *ent, const H5O_class_t *type, intn sequence);
herr_t H5O_reset (const H5O_class_t *type, void *native);
herr_t H5O_share (H5F_t *f, const H5O_class_t *type, const void *mesg,
H5HG_t *hobj/*out*/);
herr_t H5O_debug (H5F_t *f, const haddr_t *addr, FILE * stream, intn indent,
intn fwidth);
/* EFL operators */
size_t H5O_efl_total_size (H5O_efl_t *efl);
herr_t H5O_efl_read (H5F_t *f, const H5O_efl_t *efl, haddr_t *addr,
size_t size, uint8 *buf);
herr_t H5O_efl_write (H5F_t *f, const H5O_efl_t *efl, haddr_t *addr,
size_t size, const uint8 *buf);
#endif
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