hdf5/src/H5Apkg.h

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Programmer:  Quincey Koziol
 *              Monday, Apr 20
 *
 * Purpose:     This file contains declarations which are visible only within
 *              the H5A package.  Source files outside the H5A package should
 *              include H5Aprivate.h instead.
 */
#if !(defined H5A_FRIEND || defined H5A_MODULE)
#error "Do not include this file outside the H5A package!"
#endif

#ifndef H5Apkg_H
#define H5Apkg_H

/*
 * Define this to enable debugging.
 */
#ifdef NDEBUG
#undef H5A_DEBUG
#endif

/* Get package's private header */
#include "H5Aprivate.h"

/* Other private headers needed by this file */
#include "H5B2private.h" /* v2 B-trees				*/
#include "H5FLprivate.h" /* Free Lists				*/
#include "H5HFprivate.h" /* Fractal heaps			*/
#include "H5Oprivate.h"  /* Object headers		  	*/
#include "H5Sprivate.h"  /* Dataspace				*/
#include "H5Tprivate.h"  /* Datatype functions			*/

/**************************/
/* Package Private Macros */
/**************************/

/* This is the initial version, which does not have support for shared datatypes */
#define H5O_ATTR_VERSION_1 1

/* This version allows support for shared datatypes & dataspaces by adding a
 *      'flag' byte indicating when those components are shared.  This version
 *      also dropped the alignment on all the components.
 */
#define H5O_ATTR_VERSION_2 2

/* Add support for different character encodings of attribute names */
#define H5O_ATTR_VERSION_3 3

/* The latest version of the format.  Look through the 'encode', 'decode'
 *      and 'size' message callbacks for places to change when updating this.
 */
#define H5O_ATTR_VERSION_LATEST H5O_ATTR_VERSION_3

/****************************/
/* Package Private Typedefs */
/****************************/
/* Define the shared attribute structure */
typedef struct H5A_shared_t {
    uint8_t version; /* Version to encode attribute with */

    char *     name;     /* Attribute's name */
    H5T_cset_t encoding; /* Character encoding of attribute name */

    H5T_t *dt;      /* Attribute's datatype */
    size_t dt_size; /* Size of datatype on disk */

    H5S_t *ds;      /* Attribute's dataspace */
    size_t ds_size; /* Size of dataspace on disk */

    void *            data;      /* Attribute data (on a temporary basis) */
    size_t            data_size; /* Size of data on disk */
    H5O_msg_crt_idx_t crt_idx;   /* Attribute's creation index in the object header */
    unsigned          nrefs;     /* Ref count for times this object is referred	*/
} H5A_shared_t;

/* Define the main attribute structure */
struct H5A_t {
    H5O_shared_t  sh_loc;     /* Shared message info (must be first) */
    H5O_loc_t     oloc;       /* Object location for object attribute is on */
    hbool_t       obj_opened; /* Object header entry opened? */
    H5G_name_t    path;       /* Group hierarchy path */
    H5A_shared_t *shared;     /* Shared attribute information */
};

/* Typedefs for "dense" attribute storage */
/* (fractal heap & v2 B-tree info) */

/* Typedef for native 'name' field index records in the v2 B-tree */
/* (Keep 'id' field first so generic record handling in callbacks works) */
typedef struct H5A_dense_bt2_name_rec_t {
    H5O_fheap_id_t    id;     /* Heap ID for attribute */
    uint8_t           flags;  /* Object header message flags for attribute */
    H5O_msg_crt_idx_t corder; /* 'creation order' field value */
    uint32_t          hash;   /* Hash of 'name' field value */
} H5A_dense_bt2_name_rec_t;

/* Typedef for native 'creation order' field index records in the v2 B-tree */
/* (Keep 'id' field first so generic record handling in callbacks works) */
typedef struct H5A_dense_bt2_corder_rec_t {
    H5O_fheap_id_t    id;     /* Heap ID for attribute */
    uint8_t           flags;  /* Object header message flags for attribute */
    H5O_msg_crt_idx_t corder; /* 'creation order' field value */
} H5A_dense_bt2_corder_rec_t;

/* Define the 'found' callback function pointer for matching an attribute record in a v2 B-tree */
typedef herr_t (*H5A_bt2_found_t)(const H5A_t *attr, hbool_t *took_ownership, void *op_data);

/*
 * Common data exchange structure for dense attribute storage.  This structure
 * is passed through the v2 B-tree layer to the methods for the objects
 * to which the v2 B-tree points.
 */
typedef struct H5A_bt2_ud_common_t {
    /* downward */
    H5F_t *           f;             /* Pointer to file that fractal heap is in */
    H5HF_t *          fheap;         /* Fractal heap handle               */
    H5HF_t *          shared_fheap;  /* Fractal heap handle for shared messages */
    const char *      name;          /* Name of attribute to compare      */
    uint32_t          name_hash;     /* Hash of name of attribute to compare */
    uint8_t           flags;         /* Flags for attribute storage location */
    H5O_msg_crt_idx_t corder;        /* Creation order value of attribute to compare */
    H5A_bt2_found_t   found_op;      /* Callback when correct attribute is found */
    void *            found_op_data; /* Callback data when correct attribute is found */
} H5A_bt2_ud_common_t;

/*
 * Data exchange structure for dense attribute storage.  This structure is
 * passed through the v2 B-tree layer when inserting attributes.
 */
typedef struct H5A_bt2_ud_ins_t {
    /* downward */
    H5A_bt2_ud_common_t common; /* Common info for B-tree user data (must be first) */
    H5O_fheap_id_t      id;     /* Heap ID of attribute to insert    */
} H5A_bt2_ud_ins_t;

/* Data structure to hold table of attributes for an object */
typedef struct {
    size_t  nattrs; /* # of attributes in table */
    H5A_t **attrs;  /* Pointer to array of attribute pointers */
} H5A_attr_table_t;

/*****************************/
/* Package Private Variables */
/*****************************/

/* Declare extern the free list for H5A_t's */
H5FL_EXTERN(H5A_t);

/* Declare the external free lists for H5A_shared_t's */
H5FL_EXTERN(H5A_shared_t);

/* Declare extern a free list to manage blocks of type conversion data */
H5FL_BLK_EXTERN(attr_buf);

/* The v2 B-tree class for indexing 'name' field on attributes */
H5_DLLVAR const H5B2_class_t H5A_BT2_NAME[1];

/* The v2 B-tree class for indexing 'creation order' field on attributes */
H5_DLLVAR const H5B2_class_t H5A_BT2_CORDER[1];

/******************************/
/* Package Private Prototypes */
/******************************/

/* Function prototypes for H5A package scope */
H5_DLL H5A_t *H5A__create(const H5G_loc_t *loc, const char *attr_name, const H5T_t *type, const H5S_t *space,
                          hid_t acpl_id);
H5_DLL H5A_t *H5A__create_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_name,
                                  const H5T_t *type, const H5S_t *space, hid_t acpl_id);
H5_DLL H5A_t *H5A__open(const H5G_loc_t *loc, const char *attr_name);
H5_DLL H5A_t *H5A__open_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_name);
H5_DLL H5A_t *H5A__open_by_idx(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
                               H5_iter_order_t order, hsize_t n);
H5_DLL H5A_t *H5A__copy(H5A_t *new_attr, const H5A_t *old_attr);
H5_DLL hid_t  H5A__get_type(H5A_t *attr);
H5_DLL herr_t H5A__get_info(const H5A_t *attr, H5A_info_t *ainfo);
H5_DLL hid_t  H5A__get_create_plist(H5A_t *attr);
H5_DLL herr_t H5A__shared_free(H5A_t *attr);
H5_DLL herr_t H5A__close(H5A_t *attr);
H5_DLL htri_t H5A__get_ainfo(H5F_t *f, H5O_t *oh, H5O_ainfo_t *ainfo);
H5_DLL herr_t H5A__set_version(const H5F_t *f, H5A_t *attr);
H5_DLL herr_t H5A__rename_by_name(H5G_loc_t loc, const char *obj_name, const char *old_attr_name,
                                  const char *new_attr_name);
H5_DLL herr_t H5A__iterate(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
                           H5_iter_order_t order, hsize_t *idx, H5A_operator2_t op, void *op_data);
#ifndef H5_NO_DEPRECATED_SYMBOLS
H5_DLL herr_t H5A__iterate_old(hid_t loc_id, unsigned *attr_num, H5A_operator1_t op, void *op_data);
#endif /* H5_NO_DEPRECATED_SYMBOLS */
H5_DLL herr_t H5A__delete_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_name);
H5_DLL herr_t H5A__delete_by_idx(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
                                 H5_iter_order_t order, hsize_t n);
H5_DLL herr_t H5A__exists_by_name(H5G_loc_t loc, const char *obj_name, const char *attr_name,
                                  hbool_t *attr_exists);
H5_DLL herr_t H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf);
H5_DLL herr_t H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf);
H5_DLL herr_t H5A__get_name(H5A_t *attr, size_t buf_size, char *buf, size_t *attr_name_len);

/* Attribute "dense" storage routines */
H5_DLL herr_t H5A__dense_create(H5F_t *f, H5O_ainfo_t *ainfo);
H5_DLL H5A_t *H5A__dense_open(H5F_t *f, const H5O_ainfo_t *ainfo, const char *name);
H5_DLL herr_t H5A__dense_insert(H5F_t *f, const H5O_ainfo_t *ainfo, H5A_t *attr);
H5_DLL herr_t H5A__dense_write(H5F_t *f, const H5O_ainfo_t *ainfo, H5A_t *attr);
H5_DLL herr_t H5A__dense_rename(H5F_t *f, const H5O_ainfo_t *ainfo, const char *old_name,
                                const char *new_name);
H5_DLL herr_t H5A__dense_iterate(H5F_t *f, hid_t loc_id, const H5O_ainfo_t *ainfo, H5_index_t idx_type,
                                 H5_iter_order_t order, hsize_t skip, hsize_t *last_attr,
                                 const H5A_attr_iter_op_t *attr_op, void *op_data);
H5_DLL herr_t H5A__dense_remove(H5F_t *f, const H5O_ainfo_t *ainfo, const char *name);
H5_DLL herr_t H5A__dense_remove_by_idx(H5F_t *f, const H5O_ainfo_t *ainfo, H5_index_t idx_type,
                                       H5_iter_order_t order, hsize_t n);
H5_DLL herr_t H5A__dense_exists(H5F_t *f, const H5O_ainfo_t *ainfo, const char *name, hbool_t *attr_exists);
H5_DLL herr_t H5A__dense_delete(H5F_t *f, H5O_ainfo_t *ainfo);

/* Attribute table operations */
H5_DLL herr_t H5A__compact_build_table(H5F_t *f, H5O_t *oh, H5_index_t idx_type, H5_iter_order_t order,
                                       H5A_attr_table_t *atable);
H5_DLL herr_t H5A__dense_build_table(H5F_t *f, const H5O_ainfo_t *ainfo, H5_index_t idx_type,
                                     H5_iter_order_t order, H5A_attr_table_t *atable);
H5_DLL herr_t H5A__attr_iterate_table(const H5A_attr_table_t *atable, hsize_t skip, hsize_t *last_attr,
                                      hid_t loc_id, const H5A_attr_iter_op_t *attr_op, void *op_data);
H5_DLL herr_t H5A__attr_release_table(H5A_attr_table_t *atable);

/* Attribute operations */
H5_DLL herr_t H5O__attr_create(const H5O_loc_t *loc, H5A_t *attr);
H5_DLL H5A_t *H5O__attr_open_by_name(const H5O_loc_t *loc, const char *name);
H5_DLL H5A_t *H5O__attr_open_by_idx(const H5O_loc_t *loc, H5_index_t idx_type, H5_iter_order_t order,
                                    hsize_t n);
H5_DLL herr_t H5O__attr_update_shared(H5F_t *f, H5O_t *oh, H5A_t *attr, H5O_shared_t *sh_mesg);
H5_DLL herr_t H5O__attr_write(const H5O_loc_t *loc, H5A_t *attr);
H5_DLL herr_t H5O__attr_rename(const H5O_loc_t *loc, const char *old_name, const char *new_name);
H5_DLL herr_t H5O__attr_iterate(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order, hsize_t skip,
                                hsize_t *last_attr, const H5A_attr_iter_op_t *op, void *op_data);
H5_DLL herr_t H5O__attr_remove(const H5O_loc_t *loc, const char *name);
H5_DLL herr_t H5O__attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type, H5_iter_order_t order,
                                      hsize_t n);
H5_DLL herr_t H5O__attr_exists(const H5O_loc_t *loc, const char *name, hbool_t *attr_exists);
H5_DLL H5A_t *H5A__attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_size,
                                  H5O_copy_t *cpy_info);
H5_DLL herr_t H5A__attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *mesg_src, H5O_loc_t *dst_oloc,
                                       const H5A_t *mesg_dst, H5O_copy_t *cpy_info);
H5_DLL herr_t H5A__dense_post_copy_file_all(const H5O_loc_t *src_oloc, const H5O_ainfo_t *ainfo_src,
                                            H5O_loc_t *dst_oloc, H5O_ainfo_t *ainfo_dst,
                                            H5O_copy_t *cpy_info);

/* Testing functions */
#ifdef H5A_TESTING
H5_DLL htri_t H5A__is_shared_test(hid_t aid);
H5_DLL herr_t H5A__get_shared_rc_test(hid_t attr_id, hsize_t *ref_count);
#endif /* H5A_TESTING */

#endif /* H5Apkg_H */