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a59d91d19251163b0e9cfeb351f8a069d6e6fd64
hdf5/src/H5A.c
Neil Fortner a59d91d192 [svn-r15485] Purpose: Allow library to shut down properly when objects have reference count 
> 1.

Description: Added a new field 'app_count' to H5I_id_info_t struct, to track
    the reference count on an id due to the application.  the old 'count' field
    tracks the total.  Generally any id visible to the application gets placed
    in app_count.  Added app_ref boolean parameter to H5I_inc_ref, H5I_dec_ref,
    H5I_register, H5I_clear_type, and a few other functions, to specify whether
    the operation(s) being performed on the id(s) are due to the application
    (TRUE) or not (FALSE).  Test added for this case.

Tested: kagiso, smirom, linew (h5committest)
2008-08-19 11:35:16 -05:00

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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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/****************/
/* Module Setup */
/****************/
#define H5A_PACKAGE /*suppress error about including H5Apkg */
#define H5O_PACKAGE /*suppress error about including H5Opkg */
/* Interface initialization */
#define H5_INTERFACE_INIT_FUNC H5A_init_interface
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Apkg.h" /* Attributes */
#include "H5Opkg.h" /* Object headers */
#include "H5Eprivate.h" /* Error handling */
#include "H5FLprivate.h" /* Free Lists */
#include "H5Iprivate.h" /* IDs */
#include "H5MMprivate.h" /* Memory management */
#include "H5Sprivate.h" /* Dataspace functions */
#include "H5SMprivate.h" /* Shared Object Header Messages */
/****************/
/* Local Macros */
/****************/
/* The number of reserved IDs in dataset ID group */
#define H5A_RESERVED_ATOMS 0
/******************/
/* Local Typedefs */
/******************/
/* Object header iterator callbacks */
/* Data structure for callback for locating the index by name */
typedef struct H5A_iter_cb1 {
const char *name;
int idx;
} H5A_iter_cb1;
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
static herr_t H5A_open_common(const H5G_loc_t *loc, H5A_t *attr);
static herr_t H5A_write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id);
static herr_t H5A_read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id);
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* Declare the free lists of H5A_t */
H5FL_DEFINE(H5A_t);
/* Declare the free lists for H5A_shared_t's */
H5FL_DEFINE(H5A_shared_t);
/* Declare a free list to manage blocks of type conversion data */
H5FL_BLK_DEFINE(attr_buf);
/*-------------------------------------------------------------------------
* Function: H5A_init
*
* Purpose: Initialize the interface from some other package.
*
* Return: Success: non-negative
* Failure: negative
*
* Programmer: Quincey Koziol
* Monday, November 27, 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5A_init(void)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5A_init, FAIL)
/* FUNC_ENTER() does all the work */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_init() */
/*--------------------------------------------------------------------------
NAME
H5A_init_interface -- Initialize interface-specific information
USAGE
herr_t H5A_init_interface()
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Initializes any interface-specific data or routines.
--------------------------------------------------------------------------*/
static herr_t
H5A_init_interface(void)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5A_init_interface)
/*
* Create attribute ID type.
*/
if(H5I_register_type(H5I_ATTR, (size_t)H5I_ATTRID_HASHSIZE, H5A_RESERVED_ATOMS, (H5I_free_t)H5A_close) < H5I_FILE)
HGOTO_ERROR(H5E_INTERNAL, H5E_CANTINIT, FAIL, "unable to initialize interface")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_init_interface() */
/*--------------------------------------------------------------------------
NAME
H5A_term_interface
PURPOSE
Terminate various H5A objects
USAGE
void H5A_term_interface()
RETURNS
DESCRIPTION
Release any other resources allocated.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
Can't report errors...
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
int
H5A_term_interface(void)
{
int n = 0;
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_term_interface)
if(H5_interface_initialize_g) {
if((n = H5I_nmembers(H5I_ATTR))>0) {
(void)H5I_clear_type(H5I_ATTR, FALSE, FALSE);
} else {
(void)H5I_dec_type_ref(H5I_ATTR);
H5_interface_initialize_g = 0;
n = 1;
}
}
FUNC_LEAVE_NOAPI(n)
} /* H5A_term_interface() */
/*--------------------------------------------------------------------------
NAME
H5Acreate2
PURPOSE
Creates an attribute on an object
USAGE
hid_t H5Acreate2(loc_id, attr_name, type_id, space_id, acpl_id,
aapl_id)
hid_t loc_id; IN: Object (dataset or group) to be attached to
const char *attr_name; IN: Name of attribute to locate and open
hid_t type_id; IN: ID of datatype for attribute
hid_t space_id; IN: ID of dataspace for attribute
hid_t acpl_id; IN: ID of creation property list (currently not used)
hid_t aapl_id; IN: Attribute access property list
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function creates an attribute which is attached to the object
specified with 'loc_id'. The name specified with 'attr_name' for
each attribute for an object must be unique for that object. The 'type_id'
and 'space_id' are created with the H5T and H5S interfaces respectively.
The 'aapl_id' property list is currently unused, but will be used in the
future for optional attribute access properties. The attribute ID returned
from this function must be released with H5Aclose or resource leaks will
develop.
--------------------------------------------------------------------------*/
/* ARGSUSED */
hid_t
H5Acreate2(hid_t loc_id, const char *attr_name, hid_t type_id, hid_t space_id,
hid_t acpl_id, hid_t UNUSED aapl_id)
{
H5G_loc_t loc; /* Object location */
H5T_t *type; /* Datatype to use for attribute */
H5S_t *space; /* Dataspace to use for attribute */
hid_t ret_value; /* Return value */
FUNC_ENTER_API(H5Acreate2, FAIL)
H5TRACE6("i", "i*siiii", loc_id, attr_name, type_id, space_id, acpl_id, aapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(0 == (H5F_INTENT(loc.oloc->file) & H5F_ACC_RDWR))
HGOTO_ERROR(H5E_ARGS, H5E_WRITEERROR, FAIL, "no write intent on file")
if(!attr_name || !*attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a type")
if(NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space")
/* Go do the real work for attaching the attribute to the dataset */
if((ret_value = H5A_create(&loc, attr_name, type, space, acpl_id, H5AC_dxpl_id)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create attribute")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Acreate2() */
/*--------------------------------------------------------------------------
NAME
H5Acreate_by_name
PURPOSE
Creates an attribute on an object
USAGE
hid_t H5Acreate_by_name(loc_id, obj_name, attr_name, type_id, space_id, acpl_id,
aapl_id, lapl_id)
hid_t loc_id; IN: Object (dataset or group) to be attached to
const char *obj_name; IN: Name of object relative to location
const char *attr_name; IN: Name of attribute to locate and open
hid_t type_id; IN: ID of datatype for attribute
hid_t space_id; IN: ID of dataspace for attribute
hid_t acpl_id; IN: ID of creation property list (currently not used)
hid_t aapl_id; IN: Attribute access property list
hid_t lapl_id; IN: Link access property list
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function creates an attribute which is attached to the object
specified with 'loc_id/obj_name'. The name specified with 'attr_name' for
each attribute for an object must be unique for that object. The 'type_id'
and 'space_id' are created with the H5T and H5S interfaces respectively.
The 'aapl_id' property list is currently unused, but will be used in the
future for optional attribute access properties. The attribute ID returned
from this function must be released with H5Aclose or resource leaks will
develop.
--------------------------------------------------------------------------*/
/* ARGSUSED */
hid_t
H5Acreate_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
hid_t type_id, hid_t space_id, hid_t acpl_id, hid_t UNUSED aapl_id,
hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5G_loc_t obj_loc; /* Location used to open group */
H5G_name_t obj_path; /* Opened object group hier. path */
H5O_loc_t obj_oloc; /* Opened object object location */
hbool_t loc_found = FALSE; /* Entry at 'obj_name' found */
H5T_t *type; /* Datatype to use for attribute */
H5S_t *space; /* Dataspace to use for attribute */
hid_t ret_value; /* Return value */
FUNC_ENTER_API(H5Acreate_by_name, FAIL)
H5TRACE8("i", "i*s*siiiii", loc_id, obj_name, attr_name, type_id, space_id,
acpl_id, aapl_id, lapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(0 == (H5F_INTENT(loc.oloc->file) & H5F_ACC_RDWR))
HGOTO_ERROR(H5E_ARGS, H5E_WRITEERROR, FAIL, "no write intent on file")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(!attr_name || !*attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a type")
if(NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space")
/* Set up opened group location to fill in */
obj_loc.oloc = &obj_oloc;
obj_loc.path = &obj_path;
H5G_loc_reset(&obj_loc);
/* Find the object's location */
if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, H5AC_ind_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
loc_found = TRUE;
/* Go do the real work for attaching the attribute to the dataset */
if((ret_value = H5A_create(&obj_loc, attr_name, type, space, acpl_id, H5AC_dxpl_id)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create attribute")
done:
/* Release resources */
if(loc_found && H5G_loc_free(&obj_loc) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
FUNC_LEAVE_API(ret_value)
} /* H5Acreate_by_name() */
/*-------------------------------------------------------------------------
* Function: H5A_create
*
* Purpose:
* This is the guts of creating an attribute.
* Usage:
* hid_t H5A_create (ent, name, type, space)
* const H5G_entry_t *ent; IN: Pointer to symbol table entry for object to attribute
* const char *name; IN: Name of attribute
* H5T_t *type; IN: Datatype of attribute
* H5S_t *space; IN: Dataspace of attribute
* hid_t acpl_id IN: Attribute creation property list
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* April 2, 1998
*
*-------------------------------------------------------------------------
*/
hid_t
H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
const H5S_t *space, hid_t acpl_id, hid_t dxpl_id)
{
H5A_t *attr = NULL;
hssize_t snelmts; /* elements in attribute */
size_t nelmts; /* elements in attribute */
htri_t tri_ret; /* htri_t return value */
hid_t ret_value; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5A_create)
/* check args */
HDassert(loc);
HDassert(name);
HDassert(type);
HDassert(space);
/* Check for existing attribute with same name */
/* (technically, the "attribute create" operation will fail for a duplicated
* name, but it's going to be hard to unwind all the special cases on
* failure, so just check first, for now - QAK)
*/
if((tri_ret = H5O_attr_exists(loc->oloc, name, H5AC_ind_dxpl_id)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "error checking attributes")
else if(tri_ret > 0)
HGOTO_ERROR(H5E_ATTR, H5E_ALREADYEXISTS, FAIL, "attribute already exists")
/* Check if the dataspace has an extent set (or is NULL) */
if(!(H5S_has_extent(space)))
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "dataspace extent has not been set")
/* Build the attribute information */
if((attr = H5FL_CALLOC(H5A_t)) == NULL)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for attribute info")
if(NULL == (attr->shared = H5FL_CALLOC(H5A_shared_t)))
HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate shared attr structure")
/* If the creation property list is H5P_DEFAULT, use the default character encoding */
if(acpl_id == H5P_DEFAULT)
attr->shared->encoding = H5F_DEFAULT_CSET;
else {
H5P_genplist_t *ac_plist; /* ACPL Property list */
/* Get a local copy of the attribute creation property list */
if(NULL == (ac_plist = (H5P_genplist_t *)H5I_object(acpl_id)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
if(H5P_get(ac_plist, H5P_STRCRT_CHAR_ENCODING_NAME, &(attr->shared->encoding)) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get character encoding flag")
} /* end else */
/* Copy the attribute name */
attr->shared->name = H5MM_xstrdup(name);
/* Copy the attribute's datatype */
attr->shared->dt = H5T_copy(type, H5T_COPY_ALL);
/* Mark any datatypes as being on disk now */
if(H5T_set_loc(attr->shared->dt, loc->oloc->file, H5T_LOC_DISK) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "invalid datatype location")
/* Set the latest format for datatype, if requested */
if(H5F_USE_LATEST_FORMAT(loc->oloc->file))
if(H5T_set_latest_version(attr->shared->dt) < 0)
HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set latest version of datatype")
/* Copy the dataspace for the attribute */
attr->shared->ds = H5S_copy(space, FALSE, TRUE);
/* Set the latest format for dataspace, if requested */
if(H5F_USE_LATEST_FORMAT(loc->oloc->file))
if(H5S_set_latest_version(attr->shared->ds) < 0)
HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set latest version of dataspace")
/* Mark it initially set to initialized */
attr->shared->initialized = TRUE; /*for now, set to false later*/
/* Copy the object header information */
if(H5O_loc_copy(&(attr->shared->oloc), loc->oloc, H5_COPY_DEEP) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to copy entry")
/* Deep copy of the group hierarchy path */
if(H5G_name_copy(&(attr->path), loc->path, H5_COPY_DEEP) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, FAIL, "unable to copy path")
/* Check if any of the pieces should be (or are already) shared in the
* SOHM table
*/
if(H5SM_try_share(attr->shared->oloc.file, dxpl_id, NULL, H5O_DTYPE_ID, attr->shared->dt, NULL) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_BADMESG, FAIL, "trying to share datatype failed")
if(H5SM_try_share(attr->shared->oloc.file, dxpl_id, NULL, H5O_SDSPACE_ID, attr->shared->ds, NULL) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_BADMESG, FAIL, "trying to share dataspace failed")
/* Check whether datatype is committed & increment ref count
* (to maintain ref. count incr/decr similarity with "shared message"
* type of datatype sharing)
*/
if(H5T_committed(attr->shared->dt)) {
/* Increment the reference count on the shared datatype */
if(H5T_link(attr->shared->dt, 1, dxpl_id) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust shared datatype link count")
} /* end if */
/* Compute the size of pieces on disk. This is either the size of the
* datatype and dataspace messages themselves, or the size of the "shared"
* messages if either or both of them are shared.
*/
attr->shared->dt_size = H5O_msg_raw_size(attr->shared->oloc.file, H5O_DTYPE_ID, FALSE, attr->shared->dt);
attr->shared->ds_size = H5O_msg_raw_size(attr->shared->oloc.file, H5O_SDSPACE_ID, FALSE, attr->shared->ds);
/* Get # of elements for attribute's dataspace */
if((snelmts = H5S_GET_EXTENT_NPOINTS(attr->shared->ds)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
H5_ASSIGN_OVERFLOW(nelmts, snelmts, hssize_t, size_t);
HDassert(attr->shared->dt_size > 0);
HDassert(attr->shared->ds_size > 0);
attr->shared->data_size = nelmts * H5T_get_size(attr->shared->dt);
/* Hold the symbol table entry (and file) open */
if(H5O_open(&(attr->shared->oloc)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open")
attr->obj_opened = TRUE;
/* Set the version to encode the attribute with */
if(H5A_set_version(attr->shared->oloc.file, attr) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "unable to update attribute version")
/* Insert the attribute into the object header */
if(H5O_attr_create(&(attr->shared->oloc), dxpl_id, attr) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to create attribute in object header")
/* Register the new attribute and get an ID for it */
if((ret_value = H5I_register(H5I_ATTR, attr, TRUE)) < 0)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID")
/* Now it's safe to say it's uninitialized */
attr->shared->initialized = FALSE;
done:
/* Cleanup on failure */
if(ret_value < 0 && attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_create() */
/*--------------------------------------------------------------------------
NAME
H5Aopen
PURPOSE
Opens an attribute for an object by looking up the attribute name
USAGE
hid_t H5Aopen(loc_id, attr_name, aapl_id)
hid_t loc_id; IN: Object that attribute is attached to
const char *attr_name; IN: Name of attribute to locate and open
hid_t aapl_id; IN: Attribute access property list
RETURNS
ID of attribute on success, negative on failure
DESCRIPTION
This function opens an existing attribute for access. The attribute
name specified is used to look up the corresponding attribute for the
object. The attribute ID returned from this function must be released with
H5Aclose or resource leaks will develop.
--------------------------------------------------------------------------*/
hid_t
H5Aopen(hid_t loc_id, const char *attr_name, hid_t UNUSED aapl_id)
{
H5G_loc_t loc; /* Object location */
H5A_t *attr = NULL; /* Attribute opened */
hid_t ret_value;
FUNC_ENTER_API(H5Aopen, FAIL)
H5TRACE3("i", "i*si", loc_id, attr_name, aapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!attr_name || !*attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
/* Read in attribute from object header */
if(NULL == (attr = H5O_attr_open_by_name(loc.oloc, attr_name, H5AC_ind_dxpl_id)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to load attribute info from object header")
attr->shared->initialized = TRUE;
/* Finish initializing attribute */
if(H5A_open_common(&loc, attr) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to initialize attribute")
/* Register the attribute and get an ID for it */
if((ret_value = H5I_register(H5I_ATTR, attr, TRUE)) < 0)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID")
done:
/* Cleanup on failure */
if(ret_value < 0)
if(attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
FUNC_LEAVE_API(ret_value)
} /* H5Aopen() */
/*--------------------------------------------------------------------------
NAME
H5Aopen_by_name
PURPOSE
Opens an attribute for an object by looking up the attribute name
USAGE
hid_t H5Aopen_by_name(loc_id, obj_name, attr_name, aapl_id, lapl_id)
hid_t loc_id; IN: Object that attribute is attached to
const char *obj_name; IN: Name of object relative to location
const char *attr_name; IN: Name of attribute to locate and open
hid_t aapl_id; IN: Attribute access property list
hid_t lapl_id; IN: Link access property list
RETURNS
ID of attribute on success, negative on failure
DESCRIPTION
This function opens an existing attribute for access. The attribute
name specified is used to look up the corresponding attribute for the
object. The attribute ID returned from this function must be released with
H5Aclose or resource leaks will develop.
--------------------------------------------------------------------------*/
hid_t
H5Aopen_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
hid_t UNUSED aapl_id, hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5A_t *attr = NULL; /* Attribute opened */
hid_t ret_value;
FUNC_ENTER_API(H5Aopen_by_name, FAIL)
H5TRACE5("i", "i*s*sii", loc_id, obj_name, attr_name, aapl_id, lapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(!attr_name || !*attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Open the attribute on the object header */
if(NULL == (attr = H5A_open_by_name(&loc, obj_name, attr_name, lapl_id, H5AC_ind_dxpl_id)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
/* Register the attribute and get an ID for it */
if((ret_value = H5I_register(H5I_ATTR, attr, TRUE)) < 0)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID")
done:
/* Cleanup on failure */
if(ret_value < 0)
if(attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
FUNC_LEAVE_API(ret_value)
} /* H5Aopen_by_name() */
/*--------------------------------------------------------------------------
NAME
H5Aopen_by_idx
PURPOSE
Opens the n'th attribute for an object, according to the order within
an index
USAGE
hid_t H5Aopen_by_idx(loc_id, obj_ame, idx_type, order, n, aapl_id, lapl_id)
hid_t loc_id; IN: Object that attribute is attached to
const char *obj_name; IN: Name of object relative to location
H5_index_t idx_type; IN: Type of index to use
H5_iter_order_t order; IN: Order to iterate over index
hsize_t n; IN: Index (0-based) attribute to open
hid_t aapl_id; IN: Attribute access property list
hid_t lapl_id; IN: Link access property list
RETURNS
ID of attribute on success, negative on failure
DESCRIPTION
This function opens an existing attribute for access. The attribute
index specified is used to look up the corresponding attribute for the
object. The attribute ID returned from this function must be released with
H5Aclose or resource leaks will develop.
--------------------------------------------------------------------------*/
hid_t
H5Aopen_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
H5_iter_order_t order, hsize_t n, hid_t UNUSED aapl_id, hid_t lapl_id)
{
H5A_t *attr = NULL; /* Attribute opened */
H5G_loc_t loc; /* Object location */
hid_t ret_value; /* Return value */
FUNC_ENTER_API(H5Aopen_by_idx, FAIL)
H5TRACE7("i", "i*sIiIohii", loc_id, obj_name, idx_type, order, n, aapl_id,
lapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Open the attribute in the object header */
if(NULL == (attr = H5A_open_by_idx(&loc, obj_name, idx_type, order, n, lapl_id, H5AC_ind_dxpl_id)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open attribute")
/* Register the attribute and get an ID for it */
if((ret_value = H5I_register(H5I_ATTR, attr, TRUE)) < 0)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID")
done:
/* Cleanup on failure */
if(ret_value < 0)
if(attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
FUNC_LEAVE_API(ret_value)
} /* H5Aopen_by_idx() */
/*-------------------------------------------------------------------------
* Function: H5A_open_common
*
* Purpose:
* Finishes initializing an attributes the open
*
* Usage:
* herr_t H5A_open_common(loc, name, dxpl_id)
* const H5G_loc_t *loc; IN: Pointer to group location for object
* H5A_t *attr; IN/OUT: Pointer to attribute to initialize
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* December 18, 2006
*
*-------------------------------------------------------------------------
*/
static herr_t
H5A_open_common(const H5G_loc_t *loc, H5A_t *attr)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5A_open_common)
/* check args */
HDassert(loc);
HDassert(attr);
#if defined(H5_USING_MEMCHECKER) || !defined(NDEBUG)
/* Clear object location */
if(H5O_loc_reset(&(attr->shared->oloc)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to reset location")
#endif /* H5_USING_MEMCHECKER */
/* Free any previous group hier. path */
if(H5G_name_free(&(attr->path)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release group hier. path")
/* Deep copy of the symbol table entry */
if(H5O_loc_copy(&(attr->shared->oloc), loc->oloc, H5_COPY_DEEP) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to copy entry")
/* Deep copy of the group hier. path */
if(H5G_name_copy(&(attr->path), loc->path, H5_COPY_DEEP) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, FAIL, "unable to copy entry")
/* Hold the symbol table entry (and file) open */
if(H5O_open(&(attr->shared->oloc)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open")
attr->obj_opened = TRUE;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_open_common() */
/*-------------------------------------------------------------------------
* Function: H5A_open_by_idx
*
* Purpose: Open an attribute according to its index order
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* April 2, 1998
*
*-------------------------------------------------------------------------
*/
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, hid_t lapl_id, hid_t dxpl_id)
{
H5G_loc_t obj_loc; /* Location used to open group */
H5G_name_t obj_path; /* Opened object group hier. path */
H5O_loc_t obj_oloc; /* Opened object object location */
hbool_t loc_found = FALSE; /* Entry at 'obj_name' found */
H5A_t *attr = NULL; /* Attribute from object header */
H5A_t *ret_value; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5A_open_by_idx)
/* check args */
HDassert(loc);
HDassert(obj_name);
/* Set up opened group location to fill in */
obj_loc.oloc = &obj_oloc;
obj_loc.path = &obj_path;
H5G_loc_reset(&obj_loc);
/* Find the object's location */
if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "object not found")
loc_found = TRUE;
/* Read in attribute from object header */
if(NULL == (attr = H5O_attr_open_by_idx(obj_loc.oloc, idx_type, order, n, dxpl_id)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "unable to load attribute info from object header")
attr->shared->initialized = TRUE;
/* Finish initializing attribute */
if(H5A_open_common(&obj_loc, attr) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to initialize attribute")
/* Set return value */
ret_value = attr;
done:
/* Release resources */
if(loc_found && H5G_loc_free(&obj_loc) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, NULL, "can't free location")
/* Cleanup on failure */
if(ret_value == NULL)
if(attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_open_by_idx() */
/*-------------------------------------------------------------------------
* Function: H5A_open_by_name
*
* Purpose: Open an attribute in an object header, according to it's name
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* December 11, 2006
*
*-------------------------------------------------------------------------
*/
H5A_t *
H5A_open_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_name,
hid_t lapl_id, hid_t dxpl_id)
{
H5G_loc_t obj_loc; /* Location used to open group */
H5G_name_t obj_path; /* Opened object group hier. path */
H5O_loc_t obj_oloc; /* Opened object object location */
hbool_t loc_found = FALSE; /* Entry at 'obj_name' found */
H5A_t *attr = NULL; /* Attribute from object header */
H5A_t *ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5A_open_by_name, NULL)
/* check args */
HDassert(loc);
HDassert(obj_name);
HDassert(attr_name);
/* Set up opened group location to fill in */
obj_loc.oloc = &obj_oloc;
obj_loc.path = &obj_path;
H5G_loc_reset(&obj_loc);
/* Find the object's location */
if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "object not found")
loc_found = TRUE;
/* Read in attribute from object header */
if(NULL == (attr = H5O_attr_open_by_name(obj_loc.oloc, attr_name, dxpl_id)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to load attribute info from object header")
attr->shared->initialized = TRUE;
/* Finish initializing attribute */
if(H5A_open_common(loc, attr) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to initialize attribute")
/* Set return value */
ret_value = attr;
done:
/* Release resources */
if(loc_found && H5G_loc_free(&obj_loc) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, NULL, "can't free location")
/* Cleanup on failure */
if(ret_value == NULL)
if(attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_open_by_name() */
/*--------------------------------------------------------------------------
NAME
H5Awrite
PURPOSE
Write out data to an attribute
USAGE
herr_t H5Awrite (attr_id, dtype_id, buf)
hid_t attr_id; IN: Attribute to write
hid_t dtype_id; IN: Memory datatype of buffer
const void *buf; IN: Buffer of data to write
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function writes a complete attribute to disk.
--------------------------------------------------------------------------*/
herr_t
H5Awrite(hid_t attr_id, hid_t dtype_id, const void *buf)
{
H5A_t *attr; /* Attribute object for ID */
const H5T_t *mem_type = NULL;
herr_t ret_value;
FUNC_ENTER_API(H5Awrite, FAIL)
H5TRACE3("e", "ii*x", attr_id, dtype_id, buf);
/* check arguments */
if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
if(NULL == (mem_type = (H5T_t *)H5I_object_verify(dtype_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
if(NULL == buf)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null attribute buffer")
/* Go write the actual data to the attribute */
if((ret_value = H5A_write(attr, mem_type, buf, H5AC_dxpl_id)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "unable to write attribute")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Awrite() */
/*--------------------------------------------------------------------------
NAME
H5A_write
PURPOSE
Actually write out data to an attribute
USAGE
herr_t H5A_write (attr, mem_type, buf)
H5A_t *attr; IN: Attribute to write
const H5T_t *mem_type; IN: Memory datatype of buffer
const void *buf; IN: Buffer of data to write
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function writes a complete attribute to disk.
--------------------------------------------------------------------------*/
static herr_t
H5A_write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id)
{
uint8_t *tconv_buf = NULL; /* datatype conv buffer */
hbool_t tconv_owned = FALSE; /* Whether the datatype conv buffer is owned by attribute */
uint8_t *bkg_buf = NULL; /* temp conversion buffer */
hssize_t snelmts; /* elements in attribute */
size_t nelmts; /* elements in attribute */
H5T_path_t *tpath = NULL; /* conversion information*/
hid_t src_id = -1, dst_id = -1;/* temporary type atoms */
size_t src_type_size; /* size of source type */
size_t dst_type_size; /* size of destination type*/
size_t buf_size; /* desired buffer size */
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT(H5A_write)
HDassert(attr);
HDassert(mem_type);
HDassert(buf);
/* Get # of elements for attribute's dataspace */
if((snelmts = H5S_GET_EXTENT_NPOINTS(attr->shared->ds)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
H5_ASSIGN_OVERFLOW(nelmts, snelmts, hssize_t, size_t);
/* If there's actually data elements for the attribute, make a copy of the data passed in */
if(nelmts > 0) {
/* Get the memory and file datatype sizes */
src_type_size = H5T_get_size(mem_type);
dst_type_size = H5T_get_size(attr->shared->dt);
/* Convert memory buffer into disk buffer */
/* Set up type conversion function */
if(NULL == (tpath = H5T_path_find(mem_type, attr->shared->dt, NULL, NULL, dxpl_id, FALSE)))
HGOTO_ERROR(H5E_ATTR, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dst datatypes")
/* Check for type conversion required */
if(!H5T_path_noop(tpath)) {
if((src_id = H5I_register(H5I_DATATYPE, H5T_copy(mem_type, H5T_COPY_ALL), FALSE)) < 0 ||
(dst_id = H5I_register(H5I_DATATYPE, H5T_copy(attr->shared->dt, H5T_COPY_ALL), FALSE)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTREGISTER, FAIL, "unable to register types for conversion")
/* Get the maximum buffer size needed and allocate it */
buf_size = nelmts * MAX(src_type_size, dst_type_size);
if(NULL == (tconv_buf = H5FL_BLK_MALLOC (attr_buf, buf_size)) || NULL == (bkg_buf = H5FL_BLK_CALLOC(attr_buf, buf_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
/* Copy the user's data into the buffer for conversion */
HDmemcpy(tconv_buf, buf, (src_type_size * nelmts));
/* Perform datatype conversion */
if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, tconv_buf, bkg_buf, dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "datatype conversion failed")
/* Free the previous attribute data buffer, if there is one */
if(attr->shared->data)
attr->shared->data = H5FL_BLK_FREE(attr_buf, attr->shared->data);
/* Set the pointer to the attribute data to the converted information */
attr->shared->data = tconv_buf;
tconv_owned = TRUE;
} /* end if */
/* No type conversion necessary */
else {
HDassert(dst_type_size == src_type_size);
/* Allocate the attribute buffer, if there isn't one */
if(attr->shared->data == NULL)
if(NULL == (attr->shared->data = H5FL_BLK_MALLOC(attr_buf, dst_type_size * nelmts)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
/* Copy the attribute data into the user's buffer */
HDmemcpy(attr->shared->data, buf, (dst_type_size * nelmts));
} /* end else */
/* Modify the attribute in the object header */
if(H5O_attr_write(&(attr->shared->oloc), dxpl_id, attr) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to modify attribute")
} /* end if */
/* Indicate the the attribute doesn't need fill-values */
attr->shared->initialized = TRUE;
done:
/* Release resources */
if(src_id >= 0)
(void)H5I_dec_ref(src_id, FALSE);
if(dst_id >= 0)
(void)H5I_dec_ref(dst_id, FALSE);
if(tconv_buf && !tconv_owned)
H5FL_BLK_FREE(attr_buf, tconv_buf);
if(bkg_buf)
H5FL_BLK_FREE(attr_buf, bkg_buf);
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_write() */
/*--------------------------------------------------------------------------
NAME
H5Aread
PURPOSE
Read in data from an attribute
USAGE
herr_t H5Aread (attr_id, dtype_id, buf)
hid_t attr_id; IN: Attribute to read
hid_t dtype_id; IN: Memory datatype of buffer
void *buf; IN: Buffer for data to read
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function reads a complete attribute from disk.
--------------------------------------------------------------------------*/
herr_t
H5Aread(hid_t attr_id, hid_t dtype_id, void *buf)
{
H5A_t *attr; /* Attribute object for ID */
const H5T_t *mem_type = NULL;
herr_t ret_value;
FUNC_ENTER_API(H5Aread, FAIL)
H5TRACE3("e", "ii*x", attr_id, dtype_id, buf);
/* check arguments */
if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
if(NULL == (mem_type = (H5T_t *)H5I_object_verify(dtype_id, H5I_DATATYPE)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
if(NULL == buf)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null attribute buffer")
/* Go write the actual data to the attribute */
if((ret_value = H5A_read(attr, mem_type, buf, H5AC_dxpl_id)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_READERROR, FAIL, "unable to read attribute")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Aread() */
/*--------------------------------------------------------------------------
NAME
H5A_read
PURPOSE
Actually read in data from an attribute
USAGE
herr_t H5A_read (attr, mem_type, buf)
H5A_t *attr; IN: Attribute to read
const H5T_t *mem_type; IN: Memory datatype of buffer
void *buf; IN: Buffer for data to read
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function reads a complete attribute from disk.
--------------------------------------------------------------------------*/
static herr_t
H5A_read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id)
{
uint8_t *tconv_buf = NULL; /* datatype conv buffer*/
uint8_t *bkg_buf = NULL; /* background buffer */
hssize_t snelmts; /* elements in attribute */
size_t nelmts; /* elements in attribute*/
H5T_path_t *tpath = NULL; /* type conversion info */
hid_t src_id = -1, dst_id = -1;/* temporary type atoms*/
size_t src_type_size; /* size of source type */
size_t dst_type_size; /* size of destination type */
size_t buf_size; /* desired buffer size */
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT(H5A_read)
HDassert(attr);
HDassert(mem_type);
HDassert(buf);
/* Create buffer for data to store on disk */
if((snelmts = H5S_GET_EXTENT_NPOINTS(attr->shared->ds)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
H5_ASSIGN_OVERFLOW(nelmts, snelmts, hssize_t, size_t);
if(nelmts > 0) {
/* Get the memory and file datatype sizes */
src_type_size = H5T_get_size(attr->shared->dt);
dst_type_size = H5T_get_size(mem_type);
/* Check if the attribute has any data yet, if not, fill with zeroes */
if(attr->obj_opened && !attr->shared->initialized)
HDmemset(buf, 0, (dst_type_size * nelmts));
else { /* Attribute exists and has a value */
/* Convert memory buffer into disk buffer */
/* Set up type conversion function */
if(NULL == (tpath = H5T_path_find(attr->shared->dt, mem_type, NULL, NULL, dxpl_id, FALSE)))
HGOTO_ERROR(H5E_ATTR, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dst datatypes")
/* Check for type conversion required */
if(!H5T_path_noop(tpath)) {
if((src_id = H5I_register(H5I_DATATYPE, H5T_copy(attr->shared->dt, H5T_COPY_ALL), FALSE)) < 0 ||
(dst_id = H5I_register(H5I_DATATYPE, H5T_copy(mem_type, H5T_COPY_ALL), FALSE)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTREGISTER, FAIL, "unable to register types for conversion")
/* Get the maximum buffer size needed and allocate it */
buf_size = nelmts * MAX(src_type_size, dst_type_size);
if(NULL == (tconv_buf = H5FL_BLK_MALLOC(attr_buf, buf_size)) || NULL == (bkg_buf = H5FL_BLK_CALLOC(attr_buf, buf_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
/* Copy the attribute data into the buffer for conversion */
HDmemcpy(tconv_buf, attr->shared->data, (src_type_size * nelmts));
/* Perform datatype conversion. */
if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, tconv_buf, bkg_buf, dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "datatype conversion failed")
/* Copy the converted data into the user's buffer */
HDmemcpy(buf, tconv_buf, (dst_type_size * nelmts));
} /* end if */
/* No type conversion necessary */
else {
HDassert(dst_type_size == src_type_size);
/* Copy the attribute data into the user's buffer */
HDmemcpy(buf, attr->shared->data, (dst_type_size * nelmts));
} /* end else */
} /* end else */
} /* end if */
done:
/* Release resources */
if(src_id >= 0)
(void)H5I_dec_ref(src_id, FALSE);
if(dst_id >= 0)
(void)H5I_dec_ref(dst_id, FALSE);
if(tconv_buf)
H5FL_BLK_FREE(attr_buf, tconv_buf);
if(bkg_buf)
H5FL_BLK_FREE(attr_buf, bkg_buf);
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_read() */
/*--------------------------------------------------------------------------
NAME
H5Aget_space
PURPOSE
Gets a copy of the dataspace for an attribute
USAGE
hid_t H5Aget_space (attr_id)
hid_t attr_id; IN: Attribute to get dataspace of
RETURNS
A dataspace ID on success, negative on failure
DESCRIPTION
This function retrieves a copy of the dataspace for an attribute.
The dataspace ID returned from this function must be released with H5Sclose
or resource leaks will develop.
--------------------------------------------------------------------------*/
hid_t
H5Aget_space(hid_t attr_id)
{
H5A_t *attr; /* Attribute object for ID */
H5S_t *ds = NULL; /* Copy of dataspace for attribute */
hid_t ret_value;
FUNC_ENTER_API(H5Aget_space, FAIL)
H5TRACE1("i", "i", attr_id);
/* check arguments */
if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
/* Copy the attribute's dataspace */
if(NULL == (ds = H5S_copy(attr->shared->ds, FALSE, TRUE)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to copy dataspace")
/* Atomize */
if((ret_value = H5I_register(H5I_DATASPACE, ds, TRUE)) < 0)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace atom")
done:
if(ret_value < 0 && ds)
(void)H5S_close(ds);
FUNC_LEAVE_API(ret_value)
} /* H5Aget_space() */
/*--------------------------------------------------------------------------
NAME
H5Aget_type
PURPOSE
Gets a copy of the datatype for an attribute
USAGE
hid_t H5Aget_type (attr_id)
hid_t attr_id; IN: Attribute to get datatype of
RETURNS
A datatype ID on success, negative on failure
DESCRIPTION
This function retrieves a copy of the datatype for an attribute.
The datatype ID returned from this function must be released with H5Tclose
or resource leaks will develop.
--------------------------------------------------------------------------*/
hid_t
H5Aget_type(hid_t attr_id)
{
H5A_t *attr; /* Attribute object for ID */
H5T_t *dt = NULL; /* Copy of attribute's datatype */
hid_t ret_value;
FUNC_ENTER_API(H5Aget_type, FAIL)
H5TRACE1("i", "i", attr_id);
/* check arguments */
if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
/*
* Copy the attribute's datatype. If the type is a named type then
* reopen the type before returning it to the user. Make the type
* read-only.
*/
if(NULL == (dt = H5T_copy(attr->shared->dt, H5T_COPY_REOPEN)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to copy datatype")
/* Mark any datatypes as being in memory now */
if(H5T_set_loc(dt, NULL, H5T_LOC_MEMORY) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "invalid datatype location")
/* Lock copied type */
if(H5T_lock(dt, FALSE) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to lock transient datatype")
/* Atomize */
if((ret_value = H5I_register(H5I_DATATYPE, dt, TRUE)) < 0)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register datatype atom")
done:
if(ret_value < 0 && dt)
(void)H5T_close(dt);
FUNC_LEAVE_API(ret_value)
} /* H5Aget_type() */
/*--------------------------------------------------------------------------
NAME
H5Aget_create_plist
PURPOSE
Gets a copy of the creation property list for an attribute
USAGE
hssize_t H5Aget_create_plist (attr_id, buf_size, buf)
hid_t attr_id; IN: Attribute to get name of
RETURNS
This function returns the ID of a copy of the attribute's creation
property list, or negative on failure.
ERRORS
DESCRIPTION
This function returns a copy of the creation property list for
an attribute. The resulting ID must be closed with H5Pclose() or
resource leaks will occur.
--------------------------------------------------------------------------*/
hid_t
H5Aget_create_plist(hid_t attr_id)
{
H5A_t *attr; /* Attribute object for ID */
H5P_genplist_t *plist; /* Default property list */
hid_t new_plist_id; /* ID of ACPL to return */
H5P_genplist_t *new_plist; /* ACPL to return */
hid_t ret_value;
FUNC_ENTER_API(H5Aget_create_plist, FAIL)
H5TRACE1("i", "i", attr_id);
HDassert(H5P_LST_ATTRIBUTE_CREATE_g != -1);
/* Get attribute and default attribute creation property list*/
if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
if(NULL == (plist = (H5P_genplist_t *)H5I_object(H5P_LST_ATTRIBUTE_CREATE_g)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "can't get default ACPL")
/* Create the property list object to return */
if((new_plist_id = H5P_copy_plist(plist, TRUE)) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "unable to copy attribute creation properties")
if(NULL == (new_plist = (H5P_genplist_t *)H5I_object(new_plist_id)))
HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "can't get property list")
/* Set the character encoding on the new property list */
if(H5P_set(new_plist, H5P_STRCRT_CHAR_ENCODING_NAME, &(attr->shared->encoding)) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set character encoding")
ret_value = new_plist_id;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Aget_create_plist() */
/*--------------------------------------------------------------------------
NAME
H5Aget_name
PURPOSE
Gets a copy of the name for an attribute
USAGE
hssize_t H5Aget_name (attr_id, buf_size, buf)
hid_t attr_id; IN: Attribute to get name of
size_t buf_size; IN: The size of the buffer to store the string in.
char *buf; IN: Buffer to store name in
RETURNS
This function returns the length of the attribute's name (which may be
longer than 'buf_size') on success or negative for failure.
DESCRIPTION
This function retrieves the name of an attribute for an attribute ID.
Up to 'buf_size' characters are stored in 'buf' followed by a '\0' string
terminator. If the name of the attribute is longer than 'buf_size'-1,
the string terminator is stored in the last position of the buffer to
properly terminate the string.
--------------------------------------------------------------------------*/
ssize_t
H5Aget_name(hid_t attr_id, size_t buf_size, char *buf)
{
H5A_t *my_attr; /* Attribute object for ID */
ssize_t ret_value;
FUNC_ENTER_API(H5Aget_name, FAIL)
H5TRACE3("Zs", "iz*s", attr_id, buf_size, buf);
/* check arguments */
if(NULL == (my_attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
if(!buf && buf_size)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid buffer")
/* Call private function in turn */
if(0 > (ret_value = H5A_get_name(my_attr, buf_size, buf)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get attribute name")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Aget_name() */
/*--------------------------------------------------------------------------
NAME
H5A_get_name
PURPOSE
Private function for H5Aget_name. Gets a copy of the name for an
attribute
RETURNS
This function returns the length of the attribute's name (which may be
longer than 'buf_size') on success or negative for failure.
DESCRIPTION
This function retrieves the name of an attribute for an attribute ID.
Up to 'buf_size' characters are stored in 'buf' followed by a '\0' string
terminator. If the name of the attribute is longer than 'buf_size'-1,
the string terminator is stored in the last position of the buffer to
properly terminate the string.
--------------------------------------------------------------------------*/
ssize_t
H5A_get_name(H5A_t *attr, size_t buf_size, char *buf)
{
size_t copy_len, nbytes;
ssize_t ret_value;
FUNC_ENTER_NOAPI(H5A_get_name, FAIL)
/* get the real attribute length */
nbytes = HDstrlen(attr->shared->name);
HDassert((ssize_t)nbytes >= 0); /*overflow, pretty unlikely --rpm*/
/* compute the string length which will fit into the user's buffer */
copy_len = MIN(buf_size - 1, nbytes);
/* Copy all/some of the name */
if(buf && copy_len > 0) {
HDmemcpy(buf, attr->shared->name, copy_len);
/* Terminate the string */
buf[copy_len]='\0';
} /* end if */
/* Set return value */
ret_value = (ssize_t)nbytes;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_get_name() */
/*-------------------------------------------------------------------------
* Function: H5Aget_name_by_idx
*
* Purpose: Retrieve name of an attribute, according to the
* order within an index.
*
* Same pattern of behavior as H5Iget_name.
*
* Return: Success: Non-negative length of name, with information
* in NAME buffer
* Failure: Negative
*
* Programmer: Quincey Koziol
* February 8, 2007
*
*-------------------------------------------------------------------------
*/
ssize_t
H5Aget_name_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
H5_iter_order_t order, hsize_t n, char *name /*out*/, size_t size,
hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5A_t *attr = NULL; /* Attribute object for name */
ssize_t ret_value; /* Return value */
FUNC_ENTER_API(H5Aget_name_by_idx, FAIL)
H5TRACE8("Zs", "i*sIiIohxzi", loc_id, obj_name, idx_type, order, n, name, size,
lapl_id);
/* Check args */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Open the attribute on the object header */
if(NULL == (attr = H5A_open_by_idx(&loc, obj_name, idx_type, order, n, lapl_id, H5AC_ind_dxpl_id)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
/* Get the length of the name */
ret_value = (ssize_t)HDstrlen(attr->shared->name);
/* Copy the name into the user's buffer, if given */
if(name) {
HDstrncpy(name, attr->shared->name, MIN((size_t)(ret_value + 1), size));
if((size_t)ret_value >= size)
name[size - 1]='\0';
} /* end if */
done:
/* Release resources */
if(attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
FUNC_LEAVE_API(ret_value)
} /* end H5Aget_name_by_idx() */
/*-------------------------------------------------------------------------
* Function: H5Aget_storage_size
*
* Purpose: Returns the amount of storage size that is required for this
* attribute.
*
* Return: Success: The amount of storage size allocated for the
* attribute. The return value may be zero
* if no data has been stored.
*
* Failure: Zero
*
* Programmer: Raymond Lu
* October 23, 2002
*
*-------------------------------------------------------------------------
*/
hsize_t
H5Aget_storage_size(hid_t attr_id)
{
H5A_t *attr; /* Attribute object for ID */
hsize_t ret_value; /* Return value */
FUNC_ENTER_API(H5Aget_storage_size, 0)
H5TRACE1("h", "i", attr_id);
/* Check args */
if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not an attribute")
/* Set return value */
ret_value = attr->shared->data_size;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Aget_storage_size() */
/*-------------------------------------------------------------------------
* Function: H5Aget_info
*
* Purpose: Retrieve information about an attribute.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* February 6, 2007
*
*-------------------------------------------------------------------------
*/
herr_t
H5Aget_info(hid_t attr_id, H5A_info_t *ainfo)
{
H5A_t *attr; /* Attribute object for name */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Aget_info, FAIL)
H5TRACE2("e", "i*x", attr_id, ainfo);
/* Check args */
if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
/* Get the attribute information */
if(H5A_get_info(attr, ainfo) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to get attribute info")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Aget_info() */
/*-------------------------------------------------------------------------
* Function: H5Aget_info_by_name
*
* Purpose: Retrieve information about an attribute by name.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* February 6, 2007
*
*-------------------------------------------------------------------------
*/
herr_t
H5Aget_info_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
H5A_info_t *ainfo, hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5A_t *attr = NULL; /* Attribute object for name */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Aget_info_by_name, FAIL)
H5TRACE5("e", "i*s*s*xi", loc_id, obj_name, attr_name, ainfo, lapl_id);
/* Check args */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(!attr_name || !*attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
if(NULL == ainfo)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid info pointer")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Open the attribute on the object header */
if(NULL == (attr = H5A_open_by_name(&loc, obj_name, attr_name, lapl_id, H5AC_ind_dxpl_id)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
/* Get the attribute information */
if(H5A_get_info(attr, ainfo) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to get attribute info")
done:
/* Cleanup on failure */
if(attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
FUNC_LEAVE_API(ret_value)
} /* end H5Aget_info_by_name() */
/*-------------------------------------------------------------------------
* Function: H5Aget_info_by_idx
*
* Purpose: Retrieve information about an attribute, according to the
* order within an index.
*
* Return: Success: Non-negative with information in AINFO
* Failure: Negative
*
* Programmer: Quincey Koziol
* February 8, 2007
*
*-------------------------------------------------------------------------
*/
herr_t
H5Aget_info_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
H5_iter_order_t order, hsize_t n, H5A_info_t *ainfo, hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5A_t *attr = NULL; /* Attribute object for name */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Aget_info_by_idx, FAIL)
H5TRACE7("e", "i*sIiIoh*xi", loc_id, obj_name, idx_type, order, n, ainfo,
lapl_id);
/* Check args */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
if(NULL == ainfo)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid info pointer")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Open the attribute on the object header */
if(NULL == (attr = H5A_open_by_idx(&loc, obj_name, idx_type, order, n, lapl_id, H5AC_ind_dxpl_id)))
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
/* Get the attribute information */
if(H5A_get_info(attr, ainfo) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to get attribute info")
done:
/* Release resources */
if(attr && H5A_close(attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
FUNC_LEAVE_API(ret_value)
} /* end H5Aget_info_by_idx() */
/*-------------------------------------------------------------------------
* Function: H5A_get_info
*
* Purpose: Retrieve information about an attribute.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* February 6, 2007
*
*-------------------------------------------------------------------------
*/
herr_t
H5A_get_info(const H5A_t *attr, H5A_info_t *ainfo)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5A_get_info, FAIL)
/* Check args */
HDassert(attr);
HDassert(ainfo);
/* Set info for attribute */
ainfo->cset = attr->shared->encoding;
ainfo->data_size = attr->shared->data_size;
if(attr->shared->crt_idx == H5O_MAX_CRT_ORDER_IDX) {
ainfo->corder_valid = FALSE;
ainfo->corder = 0;
} /* end if */
else {
ainfo->corder_valid = TRUE;
ainfo->corder = attr->shared->crt_idx;
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_get_info() */
/*-------------------------------------------------------------------------
* Function: H5Arename
*
* Purpose: Rename an attribute
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Raymond Lu
* October 23, 2002
*
*-------------------------------------------------------------------------
*/
herr_t
H5Arename(hid_t loc_id, const char *old_name, const char *new_name)
{
H5G_loc_t loc; /* Object location */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Arename, FAIL)
H5TRACE3("e", "i*s*s", loc_id, old_name, new_name);
/* check arguments */
if(!old_name || !new_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "name is nil")
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, & loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
/* Avoid thrashing things if the names are the same */
if(HDstrcmp(old_name, new_name))
/* Call attribute rename routine */
if(H5O_attr_rename(loc.oloc, H5AC_dxpl_id, old_name, new_name) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Arename() */
/*-------------------------------------------------------------------------
* Function: H5Arename_by_name
*
* Purpose: Rename an attribute
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* February 20, 2007
*
*-------------------------------------------------------------------------
*/
herr_t
H5Arename_by_name(hid_t loc_id, const char *obj_name, const char *old_attr_name,
const char *new_attr_name, hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5G_loc_t obj_loc; /* Location used to open group */
H5G_name_t obj_path; /* Opened object group hier. path */
H5O_loc_t obj_oloc; /* Opened object object location */
hbool_t loc_found = FALSE; /* Entry at 'obj_name' found */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Arename_by_name, FAIL)
H5TRACE5("e", "i*s*s*si", loc_id, obj_name, old_attr_name, new_attr_name,
lapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(!old_attr_name || !*old_attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no old attribute name")
if(!new_attr_name || !*new_attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no new attribute name")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Avoid thrashing things if the names are the same */
if(HDstrcmp(old_attr_name, new_attr_name)) {
/* Set up opened group location to fill in */
obj_loc.oloc = &obj_oloc;
obj_loc.path = &obj_path;
H5G_loc_reset(&obj_loc);
/* Find the object's location */
if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, H5AC_ind_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
loc_found = TRUE;
/* Call attribute rename routine */
if(H5O_attr_rename(obj_loc.oloc, H5AC_dxpl_id, old_attr_name, new_attr_name) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
} /* end if */
done:
/* Release resources */
if(loc_found && H5G_loc_free(&obj_loc) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
FUNC_LEAVE_API(ret_value)
} /* H5Arename_by_name() */
/*--------------------------------------------------------------------------
NAME
H5Aiterate2
PURPOSE
Calls a user's function for each attribute on an object
USAGE
herr_t H5Aiterate2(loc_id, idx_type, order, idx, op, op_data)
hid_t loc_id; IN: Base location for object
H5_index_t idx_type; IN: Type of index to use
H5_iter_order_t order; IN: Order to iterate over index
hsize_t *idx; IN/OUT: Starting (IN) & Ending (OUT) attribute
in index & order
H5A_operator2_t op; IN: User's function to pass each attribute to
void *op_data; IN/OUT: User's data to pass through to iterator
operator function
RETURNS
Returns a negative value if an error occurs, the return value of the
last operator if it was non-zero (which can be a negative value), or zero
if all attributes were processed.
DESCRIPTION
This function interates over the attributes of dataset or group
specified with 'loc_id' & 'obj_name'. For each attribute of the object,
the 'op_data' and some additional information (specified below) are passed
to the 'op' function. The iteration begins with the '*idx'
object in the group and the next attribute to be processed by the operator
is returned in '*idx'.
The operation receives the ID for the group or dataset being iterated
over ('loc_id'), the name of the current attribute about the object
('attr_name'), the attribute's "info" struct ('ainfo') and the pointer to
the operator data passed in to H5Aiterate2 ('op_data'). The return values
from an operator are:
A. Zero causes the iterator to continue, returning zero when all
attributes have been processed.
B. Positive causes the iterator to immediately return that positive
value, indicating short-circuit success. The iterator can be
restarted at the next attribute.
C. Negative causes the iterator to immediately return that value,
indicating failure. The iterator can be restarted at the next
attribute.
--------------------------------------------------------------------------*/
herr_t
H5Aiterate2(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order,
hsize_t *idx, H5A_operator2_t op, void *op_data)
{
H5A_attr_iter_op_t attr_op; /* Attribute operator */
hsize_t start_idx; /* Index of attribute to start iterating at */
hsize_t last_attr; /* Index of last attribute examined */
herr_t ret_value; /* Return value */
FUNC_ENTER_API(H5Aiterate2, FAIL)
H5TRACE6("e", "iIiIo*hx*x", loc_id, idx_type, order, idx, op, op_data);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
/* Build attribute operator info */
attr_op.op_type = H5A_ATTR_OP_APP2;
attr_op.u.app_op2 = op;
/* Call attribute iteration routine */
last_attr = start_idx = (idx ? *idx : 0);
if((ret_value = H5O_attr_iterate(loc_id, H5AC_ind_dxpl_id, idx_type, order, start_idx, &last_attr, &attr_op, op_data)) < 0)
HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes");
/* Set the last attribute information */
if(idx)
*idx = last_attr;
done:
FUNC_LEAVE_API(ret_value)
} /* H5Aiterate2() */
/*--------------------------------------------------------------------------
NAME
H5Aiterate_by_name
PURPOSE
Calls a user's function for each attribute on an object
USAGE
herr_t H5Aiterate2(loc_id, obj_name, idx_type, order, idx, op, op_data, lapl_id)
hid_t loc_id; IN: Base location for object
const char *obj_name; IN: Name of object relative to location
H5_index_t idx_type; IN: Type of index to use
H5_iter_order_t order; IN: Order to iterate over index
hsize_t *idx; IN/OUT: Starting (IN) & Ending (OUT) attribute
in index & order
H5A_operator2_t op; IN: User's function to pass each attribute to
void *op_data; IN/OUT: User's data to pass through to iterator
operator function
hid_t lapl_id; IN: Link access property list
RETURNS
Returns a negative value if an error occurs, the return value of the
last operator if it was non-zero (which can be a negative value), or zero
if all attributes were processed.
DESCRIPTION
This function interates over the attributes of dataset or group
specified with 'loc_id' & 'obj_name'. For each attribute of the object,
the 'op_data' and some additional information (specified below) are passed
to the 'op' function. The iteration begins with the '*idx'
object in the group and the next attribute to be processed by the operator
is returned in '*idx'.
The operation receives the ID for the group or dataset being iterated
over ('loc_id'), the name of the current attribute about the object
('attr_name'), the attribute's "info" struct ('ainfo') and the pointer to
the operator data passed in to H5Aiterate_by_name ('op_data'). The return values
from an operator are:
A. Zero causes the iterator to continue, returning zero when all
attributes have been processed.
B. Positive causes the iterator to immediately return that positive
value, indicating short-circuit success. The iterator can be
restarted at the next attribute.
C. Negative causes the iterator to immediately return that value,
indicating failure. The iterator can be restarted at the next
attribute.
--------------------------------------------------------------------------*/
herr_t
H5Aiterate_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
H5_iter_order_t order, hsize_t *idx, H5A_operator2_t op, void *op_data,
hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5G_loc_t obj_loc; /* Location used to open group */
H5G_name_t obj_path; /* Opened object group hier. path */
H5O_loc_t obj_oloc; /* Opened object object location */
hbool_t loc_found = FALSE; /* Entry at 'obj_name' found */
hid_t obj_loc_id = (-1); /* ID for object located */
H5A_attr_iter_op_t attr_op; /* Attribute operator */
hsize_t start_idx; /* Index of attribute to start iterating at */
hsize_t last_attr; /* Index of last attribute examined */
herr_t ret_value; /* Return value */
FUNC_ENTER_API(H5Aiterate_by_name, FAIL)
H5TRACE8("e", "i*sIiIo*hx*xi", loc_id, obj_name, idx_type, order, idx, op,
op_data, lapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Set up opened group location to fill in */
obj_loc.oloc = &obj_oloc;
obj_loc.path = &obj_path;
H5G_loc_reset(&obj_loc);
/* Find the object's location */
if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, H5AC_ind_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
loc_found = TRUE;
/* Open the object */
if((obj_loc_id = H5O_open_by_loc(&obj_loc, H5AC_ind_dxpl_id, TRUE)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
/* Build attribute operator info */
attr_op.op_type = H5A_ATTR_OP_APP2;
attr_op.u.app_op2 = op;
/* Call attribute iteration routine */
last_attr = start_idx = (idx ? *idx : 0);
if((ret_value = H5O_attr_iterate(obj_loc_id, H5AC_ind_dxpl_id, idx_type, order, start_idx, &last_attr, &attr_op, op_data)) < 0)
HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes");
/* Set the last attribute information */
if(idx)
*idx = last_attr;
done:
/* Release resources */
if(obj_loc_id > 0) {
if(H5I_dec_ref(obj_loc_id, TRUE) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "unable to close temporary object")
} /* end if */
else if(loc_found && H5G_loc_free(&obj_loc) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
FUNC_LEAVE_API(ret_value)
} /* H5Aiterate_by_name() */
/*--------------------------------------------------------------------------
NAME
H5Adelete
PURPOSE
Deletes an attribute from a location
USAGE
herr_t H5Adelete(loc_id, name)
hid_t loc_id; IN: Object (dataset or group) to have attribute deleted from
const char *name; IN: Name of attribute to delete
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function removes the named attribute from a dataset or group.
--------------------------------------------------------------------------*/
herr_t
H5Adelete(hid_t loc_id, const char *name)
{
H5G_loc_t loc; /* Object location */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Adelete, FAIL)
H5TRACE2("e", "i*s", loc_id, name);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!name || !*name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
/* Delete the attribute from the location */
if(H5O_attr_remove(loc.oloc, name, H5AC_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Adelete() */
/*--------------------------------------------------------------------------
NAME
H5Adelete_by_name
PURPOSE
Deletes an attribute from a location
USAGE
herr_t H5Adelete_by_name(loc_id, obj_name, attr_name, lapl_id)
hid_t loc_id; IN: Base location for object
const char *obj_name; IN: Name of object relative to location
const char *attr_name; IN: Name of attribute to delete
hid_t lapl_id; IN: Link access property list
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function removes the named attribute from an object.
--------------------------------------------------------------------------*/
herr_t
H5Adelete_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5G_loc_t obj_loc; /* Location used to open group */
H5G_name_t obj_path; /* Opened object group hier. path */
H5O_loc_t obj_oloc; /* Opened object object location */
hbool_t loc_found = FALSE; /* Entry at 'obj_name' found */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Adelete_by_name, FAIL)
H5TRACE4("e", "i*s*si", loc_id, obj_name, attr_name, lapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(!attr_name || !*attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Set up opened group location to fill in */
obj_loc.oloc = &obj_oloc;
obj_loc.path = &obj_path;
H5G_loc_reset(&obj_loc);
/* Find the object's location */
if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, H5AC_ind_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
loc_found = TRUE;
/* Delete the attribute from the location */
if(H5O_attr_remove(obj_loc.oloc, attr_name, H5AC_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
done:
/* Release resources */
if(loc_found && H5G_loc_free(&obj_loc) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
FUNC_LEAVE_API(ret_value)
} /* H5Adelete_by_name() */
/*--------------------------------------------------------------------------
NAME
H5Adelete_by_idx
PURPOSE
Deletes an attribute from a location, according to the order within an index
USAGE
herr_t H5Adelete_by_idx(loc_id, obj_name, idx_type, order, n, lapl_id)
hid_t loc_id; IN: Base location for object
const char *obj_name; IN: Name of object relative to location
H5_index_t idx_type; IN: Type of index to use
H5_iter_order_t order; IN: Order to iterate over index
hsize_t n; IN: Offset within index
hid_t lapl_id; IN: Link access property list
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function removes an attribute from an object, using the IDX_TYPE
index to delete the N'th attribute in ORDER direction in the index. The
object is specified relative to the LOC_ID with the OBJ_NAME path. To
remove an attribute on the object specified by LOC_ID, pass in "." for
OBJ_NAME. The link access property list, LAPL_ID, controls aspects of
the group hierarchy traversal when using the OBJ_NAME to locate the final
object to operate on.
--------------------------------------------------------------------------*/
herr_t
H5Adelete_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
H5_iter_order_t order, hsize_t n, hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5G_loc_t obj_loc; /* Location used to open group */
H5G_name_t obj_path; /* Opened object group hier. path */
H5O_loc_t obj_oloc; /* Opened object object location */
hbool_t loc_found = FALSE; /* Entry at 'obj_name' found */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Adelete_by_idx, FAIL)
H5TRACE6("e", "i*sIiIohi", loc_id, obj_name, idx_type, order, n, lapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Set up opened group location to fill in */
obj_loc.oloc = &obj_oloc;
obj_loc.path = &obj_path;
H5G_loc_reset(&obj_loc);
/* Find the object's location */
if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, H5AC_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
loc_found = TRUE;
/* Delete the attribute from the location */
if(H5O_attr_remove_by_idx(obj_loc.oloc, idx_type, order, n, H5AC_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
done:
/* Release resources */
if(loc_found && H5G_loc_free(&obj_loc) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
FUNC_LEAVE_API(ret_value)
} /* H5Adelete_by_idx() */
/*--------------------------------------------------------------------------
NAME
H5Aclose
PURPOSE
Close an attribute ID
USAGE
herr_t H5Aclose (attr_id)
hid_t attr_id; IN: Attribute to release access to
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
This function releases an attribute from use. Further use of the
attribute ID will result in undefined behavior.
--------------------------------------------------------------------------*/
herr_t
H5Aclose(hid_t attr_id)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(H5Aclose, FAIL)
H5TRACE1("e", "i", attr_id);
/* check arguments */
if(NULL == H5I_object_verify(attr_id, H5I_ATTR))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
/* Decrement references to that atom (and close it) */
if(H5I_dec_ref(attr_id, TRUE) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTDEC, FAIL, "can't close attribute")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Aclose() */
/*-------------------------------------------------------------------------
* Function: H5A_copy
*
* Purpose: Copies attribute OLD_ATTR.
*
* Return: Success: Pointer to a new copy of the OLD_ATTR argument.
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Thursday, December 4, 1997
*
* Modification:Raymond Lu
* 4 June 2008
* Changed some attribute information to be shared.
*
*-------------------------------------------------------------------------
*/
H5A_t *
H5A_copy(H5A_t *_new_attr, const H5A_t *old_attr)
{
H5A_t *new_attr = NULL;
hbool_t allocated_attr = FALSE; /* Whether the attribute was allocated */
H5A_t *ret_value = NULL; /* Return value */
FUNC_ENTER_NOAPI(H5A_copy, NULL)
/* check args */
HDassert(old_attr);
/* Allocate attribute structure */
if(_new_attr == NULL) {
if(NULL == (new_attr = H5FL_CALLOC(H5A_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
allocated_attr = TRUE;
} /* end if */
else
new_attr = _new_attr;
/* Copy the top level of the attribute */
new_attr->sh_loc = old_attr->sh_loc;
/* Deep copy of the group hierarchy path */
if(H5G_name_copy(&(new_attr->path), &(old_attr->path), H5_COPY_DEEP) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, NULL, "unable to copy path")
/* Share some attribute information */
new_attr->shared = old_attr->shared;
/* Increment reference count for shared object */
new_attr->shared->nrefs++;
/* Don't open the object header for a copy */
new_attr->obj_opened = FALSE;
/* Set the return value */
ret_value = new_attr;
done:
if(ret_value == NULL)
if(allocated_attr && new_attr && H5A_close(new_attr) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_copy() */
/*-------------------------------------------------------------------------
* Function: H5A_free
*
* Purpose: Frees all memory associated with an attribute, but does not
* free the H5A_t structure (which should be done in H5T_close).
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Monday, November 15, 2004
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5A_free(H5A_t *attr)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5A_free, FAIL)
HDassert(attr);
/* Free dynamicly allocated items */
if(attr->shared->name) {
H5MM_xfree(attr->shared->name);
attr->shared->name = NULL;
}
if(attr->shared->dt) {
if(H5T_close(attr->shared->dt) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release datatype info")
attr->shared->dt = NULL;
}
if(attr->shared->ds) {
if(H5S_close(attr->shared->ds) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release dataspace info")
attr->shared->ds = NULL;
}
if(attr->shared->data)
attr->shared->data = H5FL_BLK_FREE(attr_buf, attr->shared->data);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_free() */
/*-------------------------------------------------------------------------
* Function: H5A_close
*
* Purpose: Frees an attribute and all associated memory.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* Monday, December 8, 1997
*
* Modifications:
* Raymond Lu
* 4 June 2008
* Changed some attribute object information to be shared.
*-------------------------------------------------------------------------
*/
herr_t
H5A_close(H5A_t *attr)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5A_close, FAIL)
HDassert(attr);
HDassert(attr->shared);
/* Close the object's symbol-table entry */
if(attr->obj_opened && (H5O_close(&(attr->shared->oloc)) < 0))
HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release object header info")
/* Reference count can be 0. It only happens when H5A_create fails. */
if(1 >= attr->shared->nrefs) {
/* Free dynamicly allocated items */
if(H5A_free(attr) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release attribute info")
/* Destroy shared attribute struct */
attr->shared = H5FL_FREE(H5A_shared_t, attr->shared);
} else if(attr->shared->nrefs > 1) {
/* There are other references to the shared part of the attribute.
* Only decrement the reference count. */
--attr->shared->nrefs;
}
/* Free group hierarchy path */
if(H5G_name_free(&(attr->path)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release group hier. path")
attr->shared = NULL;
H5FL_FREE(H5A_t, attr);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_close() */
/*-------------------------------------------------------------------------
* Function: H5A_oloc
*
* Purpose: Return the object location for an attribute. It's the
* object location for the object to which the attribute
* belongs, not the attribute itself.
*
* Return: Success: Ptr to entry
* Failure: NULL
*
* Programmer: Robb Matzke
* Thursday, August 6, 1998
*
*-------------------------------------------------------------------------
*/
H5O_loc_t *
H5A_oloc(H5A_t *attr)
{
H5O_loc_t *ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5A_oloc, NULL)
HDassert(attr);
/* Set return value */
ret_value = &(attr->shared->oloc);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_oloc() */
/*-------------------------------------------------------------------------
* Function: H5A_nameof
*
* Purpose: Return the group hier. path for an attribute. It's the
* group hier. path for the object to which the attribute
* belongs, not the attribute itself.
*
* Return: Success: Ptr to entry
* Failure: NULL
*
* Programmer: Quincey Koziol
* Monday, September 12, 2005
*
*-------------------------------------------------------------------------
*/
H5G_name_t *
H5A_nameof(H5A_t *attr)
{
H5G_name_t *ret_value; /* Return value */
FUNC_ENTER_NOAPI(H5A_nameof, NULL)
HDassert(attr);
/* Set return value */
ret_value=&(attr->path);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5A_nameof() */
/*-------------------------------------------------------------------------
* Function: H5Aexists
*
* Purpose: Checks if an attribute with a given name exists on an opened
* object.
*
* Return: Success: TRUE/FALSE
* Failure: Negative
*
* Programmer: Quincey Koziol
* Thursday, November 1, 2007
*
*-------------------------------------------------------------------------
*/
htri_t
H5Aexists(hid_t obj_id, const char *attr_name)
{
H5G_loc_t loc; /* Object location */
htri_t ret_value; /* Return value */
FUNC_ENTER_API(H5Aexists, FAIL)
H5TRACE2("t", "i*s", obj_id, attr_name);
/* check arguments */
if(H5I_ATTR == H5I_get_type(obj_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(obj_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!attr_name || !*attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
/* Check if the attribute exists */
if((ret_value = H5O_attr_exists(loc.oloc, attr_name, H5AC_ind_dxpl_id)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to determine if attribute exists")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Aexists() */
/*-------------------------------------------------------------------------
* Function: H5Aexists_by_name
*
* Purpose: Checks if an attribute with a given name exists on an object.
*
* Return: Success: TRUE/FALSE
* Failure: Negative
*
* Programmer: Quincey Koziol
* Thursday, November 1, 2007
*
*-------------------------------------------------------------------------
*/
htri_t
H5Aexists_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
hid_t lapl_id)
{
H5G_loc_t loc; /* Object location */
H5G_loc_t obj_loc; /* Location used to open group */
H5G_name_t obj_path; /* Opened object group hier. path */
H5O_loc_t obj_oloc; /* Opened object object location */
hbool_t loc_found = FALSE; /* Entry at 'obj_name' found */
htri_t ret_value; /* Return value */
FUNC_ENTER_API(H5Aexists_by_name, FAIL)
H5TRACE4("t", "i*s*si", loc_id, obj_name, attr_name, lapl_id);
/* check arguments */
if(H5I_ATTR == H5I_get_type(loc_id))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(!obj_name || !*obj_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
if(!attr_name || !*attr_name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
if(H5P_DEFAULT == lapl_id)
lapl_id = H5P_LINK_ACCESS_DEFAULT;
else
if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
/* Set up opened group location to fill in */
obj_loc.oloc = &obj_oloc;
obj_loc.path = &obj_path;
H5G_loc_reset(&obj_loc);
/* Find the object's location */
if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, H5AC_ind_dxpl_id) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
loc_found = TRUE;
/* Check if the attribute exists */
if((ret_value = H5O_attr_exists(obj_loc.oloc, attr_name, H5AC_ind_dxpl_id)) < 0)
HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to determine if attribute exists")
done:
/* Release resources */
if(loc_found && H5G_loc_free(&obj_loc) < 0)
HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
FUNC_LEAVE_API(ret_value)
} /* H5Aexists_by_name() */
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