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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 COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5Lpublic.h
* Dec 1 2005
* James Laird
*
* Purpose: Public declarations for the H5L package (links)
*
*-------------------------------------------------------------------------
*/
#ifndef _H5Lpublic_H
#define _H5Lpublic_H
/* Public headers needed by this file */
#include "H5public.h" /* Generic Functions */
#include "H5Ipublic.h" /* IDs */
#include "H5Tpublic.h" /* Datatypes */
/*****************/
/* Public Macros */
/*****************/
/* Maximum length of a link's name */
/* (encoded in a 32-bit unsigned integer) */
#define H5L_MAX_LINK_NAME_LEN ((uint32_t)(-1)) /* (4GB - 1) */
/* Macro to indicate operation occurs on same location */
#define H5L_SAME_LOC (hid_t)0
/* Current version of the H5L_class_t struct */
#define H5L_LINK_CLASS_T_VERS 1
/* Previous versions of the H5L_class_t struct */
#define H5L_LINK_CLASS_T_VERS_0 0
#ifdef __cplusplus
extern "C" {
#endif
/*******************/
/* Public Typedefs */
/*******************/
/* Link class types.
* Values less than 64 are reserved for the HDF5 library's internal use.
* Values 64 to 255 are for "user-defined" link class types; these types are
* defined by HDF5 but their behavior can be overridden by users.
* Users who want to create new classes of links should contact the HDF5
* development team at hdfhelp@ncsa.uiuc.edu .
* These values can never change because they appear in HDF5 files.
*/
typedef enum {
H5L_TYPE_ERROR = (-1), /* Invalid link type id */
H5L_TYPE_HARD = 0, /* Hard link id */
H5L_TYPE_SOFT = 1, /* Soft link id */
H5L_TYPE_EXTERNAL = 64, /* External link id */
H5L_TYPE_MAX = 255 /* Maximum link type id */
} H5L_type_t;
#define H5L_TYPE_BUILTIN_MAX H5L_TYPE_SOFT /* Maximum value link value for "built-in" link types */
#define H5L_TYPE_UD_MIN H5L_TYPE_EXTERNAL /* Link ids at or above this value are "user-defined" link types. */
/* Information struct for link (for H5Lget_info/H5Lget_info_by_idx) */
typedef struct {
H5L_type_t type; /* Type of link */
hbool_t corder_valid; /* Indicate if creation order is valid */
int64_t corder; /* Creation order */
H5T_cset_t cset; /* Character set of link name */
union {
haddr_t address; /* Address hard link points to */
size_t val_size; /* Size of a soft link or UD link value */
} u;
} H5L_info_t;
/* The H5L_class_t struct can be used to override the behavior of a
* "user-defined" link class. Users should populate the struct with callback
* functions defined below.
*/
/* Callback prototypes for user-defined links */
/* Link creation callback */
typedef herr_t (*H5L_create_func_t)(const char *link_name, hid_t loc_group,
const void *lnkdata, size_t lnkdata_size, hid_t lcpl_id);
/* Callback for when the link is moved */
typedef herr_t (*H5L_move_func_t)(const char *new_name, hid_t new_loc,
const void *lnkdata, size_t lnkdata_size);
/* Callback for when the link is copied */
typedef herr_t (*H5L_copy_func_t)(const char *new_name, hid_t new_loc,
const void *lnkdata, size_t lnkdata_size);
/* Callback during link traversal */
typedef hid_t (*H5L_traverse_0_func_t)(const char *link_name, hid_t cur_group,
const void *lnkdata, size_t lnkdata_size, hid_t lapl_id);
typedef hid_t (*H5L_traverse_func_t)(const char *link_name, hid_t cur_group,
const void *lnkdata, size_t lnkdata_size, hid_t lapl_id, hid_t dxpl_id);
/* Callback for when the link is deleted */
typedef herr_t (*H5L_delete_func_t)(const char *link_name, hid_t file,
const void *lnkdata, size_t lnkdata_size);
/* Callback for querying the link */
/* Returns the size of the buffer needed */
typedef ssize_t (*H5L_query_func_t)(const char *link_name, const void *lnkdata,
size_t lnkdata_size, void *buf /*out*/, size_t buf_size);
/* User-defined link types */
typedef struct {
int version; /* Version number of this struct */
H5L_type_t id; /* Link type ID */
const char *comment; /* Comment for debugging */
H5L_create_func_t create_func; /* Callback during link creation */
H5L_move_func_t move_func; /* Callback after moving link */
H5L_copy_func_t copy_func; /* Callback after copying link */
H5L_traverse_0_func_t trav_func; /* Callback during link traversal */
H5L_delete_func_t del_func; /* Callback for link deletion */
H5L_query_func_t query_func; /* Callback for queries */
} H5L_class_0_t;
typedef struct {
int version; /* Version number of this struct */
H5L_type_t id; /* Link type ID */
const char *comment; /* Comment for debugging */
H5L_create_func_t create_func; /* Callback during link creation */
H5L_move_func_t move_func; /* Callback after moving link */
H5L_copy_func_t copy_func; /* Callback after copying link */
H5L_traverse_func_t trav_func; /* Callback during link traversal */
H5L_delete_func_t del_func; /* Callback for link deletion */
H5L_query_func_t query_func; /* Callback for queries */
} H5L_class_t;
/* Prototype for H5Literate/H5Literate_by_name() operator */
typedef herr_t (*H5L_iterate_t)(hid_t group, const char *name, const H5L_info_t *info,
void *op_data);
/* Callback for external link traversal */
typedef herr_t (*H5L_elink_traverse_t)(const char *parent_file_name,
const char *parent_group_name, const char *child_file_name,
const char *child_object_name, unsigned *acc_flags, hid_t fapl_id,
void *op_data);
/********************/
/* Public Variables */
/********************/
/*********************/
/* Public Prototypes */
/*********************/
H5_DLL herr_t H5Lmove(hid_t src_loc, const char *src_name, hid_t dst_loc,
const char *dst_name, hid_t lcpl_id, hid_t lapl_id);
H5_DLL herr_t H5Lcopy(hid_t src_loc, const char *src_name, hid_t dst_loc,
const char *dst_name, hid_t lcpl_id, hid_t lapl_id);
H5_DLL herr_t H5Lcreate_hard(hid_t cur_loc, const char *cur_name,
hid_t dst_loc, const char *dst_name, hid_t lcpl_id, hid_t lapl_id);
H5_DLL herr_t H5Lcreate_soft(const char *link_target, hid_t link_loc_id,
const char *link_name, hid_t lcpl_id, hid_t lapl_id);
H5_DLL herr_t H5Ldelete(hid_t loc_id, const char *name, hid_t lapl_id);
H5_DLL herr_t H5Ldelete_by_idx(hid_t loc_id, const char *group_name,
H5_index_t idx_type, H5_iter_order_t order, hsize_t n, hid_t lapl_id);
H5_DLL herr_t H5Lget_val(hid_t loc_id, const char *name, void *buf/*out*/,
size_t size, hid_t lapl_id);
H5_DLL herr_t H5Lget_val_by_idx(hid_t loc_id, const char *group_name,
H5_index_t idx_type, H5_iter_order_t order, hsize_t n,
void *buf/*out*/, size_t size, hid_t lapl_id);
H5_DLL htri_t H5Lexists(hid_t loc_id, const char *name, hid_t lapl_id);
H5_DLL herr_t H5Lget_info(hid_t loc_id, const char *name,
H5L_info_t *linfo /*out*/, hid_t lapl_id);
H5_DLL herr_t H5Lget_info_by_idx(hid_t loc_id, const char *group_name,
H5_index_t idx_type, H5_iter_order_t order, hsize_t n,
H5L_info_t *linfo /*out*/, hid_t lapl_id);
H5_DLL ssize_t H5Lget_name_by_idx(hid_t loc_id, const char *group_name,
H5_index_t idx_type, H5_iter_order_t order, hsize_t n,
char *name /*out*/, size_t size, hid_t lapl_id);
H5_DLL herr_t H5Literate(hid_t grp_id, H5_index_t idx_type,
H5_iter_order_t order, hsize_t *idx, H5L_iterate_t op, void *op_data);
H5_DLL herr_t H5Literate_by_name(hid_t loc_id, const char *group_name,
H5_index_t idx_type, H5_iter_order_t order, hsize_t *idx,
H5L_iterate_t op, void *op_data, hid_t lapl_id);
H5_DLL herr_t H5Lvisit(hid_t grp_id, H5_index_t idx_type, H5_iter_order_t order,
H5L_iterate_t op, void *op_data);
H5_DLL herr_t H5Lvisit_by_name(hid_t loc_id, const char *group_name,
H5_index_t idx_type, H5_iter_order_t order, H5L_iterate_t op,
void *op_data, hid_t lapl_id);
/* UD link functions */
H5_DLL herr_t H5Lcreate_ud(hid_t link_loc_id, const char *link_name,
H5L_type_t link_type, const void *udata, size_t udata_size, hid_t lcpl_id,
hid_t lapl_id);
H5_DLL herr_t H5Lregister(const H5L_class_t *cls);
H5_DLL herr_t H5Lunregister(H5L_type_t id);
H5_DLL htri_t H5Lis_registered(H5L_type_t id);
/* External link functions */
H5_DLL herr_t H5Lunpack_elink_val(const void *ext_linkval/*in*/, size_t link_size,
unsigned *flags, const char **filename/*out*/, const char **obj_path /*out*/);
H5_DLL herr_t H5Lcreate_external(const char *file_name, const char *obj_name,
hid_t link_loc_id, const char *link_name, hid_t lcpl_id, hid_t lapl_id);
#ifdef __cplusplus
}
#endif
#endif /* _H5Lpublic_H */