mirror/hdf5
2
0
Fork 0
mirror of https://github.com/HDFGroup/hdf5.git synced 2025-03-25 17:00:45 +08:00
Code Issues Packages Projects Releases Wiki Activity
hdf5/src/H5R.c
Dana Robinson 9a749a64f0 More minor whitespace cleanup
2017-07-03 13:01:58 -07:00

1051 lines
37 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/****************/
/* Module Setup */
/****************/
#include "H5Rmodule.h" /* This source code file is part of the H5R module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5ACprivate.h" /* Metadata cache */
#include "H5Dprivate.h" /* Datasets */
#include "H5Eprivate.h" /* Error handling */
#include "H5Gprivate.h" /* Groups */
#include "H5HGprivate.h" /* Global Heaps */
#include "H5Iprivate.h" /* IDs */
#include "H5MMprivate.h" /* Memory management */
#include "H5Rpkg.h" /* References */
#include "H5Sprivate.h" /* Dataspaces */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Local Prototypes */
/********************/
static herr_t H5R_create(void *ref, H5G_loc_t *loc, const char *name,
H5R_type_t ref_type, H5S_t *space, hid_t dxpl_id);
static H5S_t * H5R_get_region(H5F_t *file, hid_t dxpl_id, const void *_ref);
static ssize_t H5R_get_name(H5F_t *file, hid_t lapl_id, hid_t dxpl_id, hid_t id,
H5R_type_t ref_type, const void *_ref, char *name, size_t size);
/*********************/
/* Package Variables */
/*********************/
/* Package initialization variable */
hbool_t H5_PKG_INIT_VAR = FALSE;
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* Reference ID class */
static const H5I_class_t H5I_REFERENCE_CLS[1] = {{
H5I_REFERENCE, /* ID class value */
0, /* Class flags */
0, /* # of reserved IDs for class */
NULL /* Callback routine for closing objects of this class */
}};
/* Flag indicating "top" of interface has been initialized */
static hbool_t H5R_top_package_initialize_s = FALSE;
/*--------------------------------------------------------------------------
NAME
H5R__init_package -- Initialize interface-specific information
USAGE
herr_t H5R__init_package()
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Initializes any interface-specific data or routines.
--------------------------------------------------------------------------*/
herr_t
H5R__init_package(void)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
/* Initialize the atom group for the file IDs */
if(H5I_register_type(H5I_REFERENCE_CLS) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to initialize interface")
/* Mark "top" of interface as initialized, too */
H5R_top_package_initialize_s = TRUE;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5R__init_package() */
/*--------------------------------------------------------------------------
NAME
H5R_top_term_package
PURPOSE
Terminate various H5R objects
USAGE
void H5R_top_term_package()
RETURNS
void
DESCRIPTION
Release IDs for the atom group, deferring full interface shutdown
until later (in H5R_term_package).
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
Can't report errors...
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
int
H5R_top_term_package(void)
{
int n = 0;
FUNC_ENTER_NOAPI_NOINIT_NOERR
if(H5R_top_package_initialize_s) {
if(H5I_nmembers(H5I_REFERENCE) > 0) {
(void)H5I_clear_type(H5I_REFERENCE, FALSE, FALSE);
n++; /*H5I*/
} /* end if */
/* Mark closed */
if(0 == n)
H5R_top_package_initialize_s = FALSE;
} /* end if */
FUNC_LEAVE_NOAPI(n)
} /* end H5R_top_term_package() */
/*--------------------------------------------------------------------------
NAME
H5R_term_package
PURPOSE
Terminate various H5R objects
USAGE
void H5R_term_package()
RETURNS
void
DESCRIPTION
Release the atom group and any other resources allocated.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
Can't report errors...
Finishes shutting down the interface, after H5R_top_term_package()
is called
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
int
H5R_term_package(void)
{
int n = 0;
FUNC_ENTER_NOAPI_NOINIT_NOERR
if(H5_PKG_INIT_VAR) {
/* Sanity checks */
HDassert(0 == H5I_nmembers(H5I_REFERENCE));
HDassert(FALSE == H5R_top_package_initialize_s);
/* Destroy the reference id group */
n += (H5I_dec_type_ref(H5I_REFERENCE) > 0);
/* Mark closed */
if(0 == n)
H5_PKG_INIT_VAR = FALSE;
} /* end if */
FUNC_LEAVE_NOAPI(n)
} /* end H5R_term_package() */
/*--------------------------------------------------------------------------
NAME
H5R_create
PURPOSE
Creates a particular kind of reference for the user
USAGE
herr_t H5R_create(ref, loc, name, ref_type, space)
void *ref; OUT: Reference created
H5G_loc_t *loc; IN: File location used to locate object pointed to
const char *name; IN: Name of object at location LOC_ID of object
pointed to
H5R_type_t ref_type; IN: Type of reference to create
H5S_t *space; IN: Dataspace ID with selection, used for Dataset
Region references.
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Creates a particular type of reference specified with REF_TYPE, in the
space pointed to by REF. The LOC_ID and NAME are used to locate the object
pointed to and the SPACE_ID is used to choose the region pointed to (for
Dataset Region references).
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
static herr_t
H5R_create(void *_ref, H5G_loc_t *loc, const char *name, H5R_type_t ref_type, H5S_t *space, hid_t dxpl_id)
{
H5G_loc_t obj_loc; /* Group hier. location of object */
H5G_name_t path; /* Object group hier. path */
H5O_loc_t oloc; /* Object object location */
hbool_t obj_found = FALSE; /* Object location found */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
HDassert(_ref);
HDassert(loc);
HDassert(name);
HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
/* Set up object location to fill in */
obj_loc.oloc = &oloc;
obj_loc.path = &path;
H5G_loc_reset(&obj_loc);
/* Find the object */
if(H5G_loc_find(loc, name, &obj_loc, H5P_DEFAULT, dxpl_id) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_NOTFOUND, FAIL, "object not found")
obj_found = TRUE;
switch(ref_type) {
case H5R_OBJECT:
{
hobj_ref_t *ref = (hobj_ref_t *)_ref; /* Get pointer to correct type of reference struct */
*ref = obj_loc.oloc->addr;
break;
}
case H5R_DATASET_REGION:
{
H5HG_t hobjid; /* Heap object ID */
hdset_reg_ref_t *ref = (hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */
hssize_t buf_size; /* Size of buffer needed to serialize selection */
uint8_t *p; /* Pointer to OID to store */
uint8_t *buf; /* Buffer to store serialized selection in */
unsigned heapid_found; /* Flag for non-zero heap ID found */
unsigned u; /* local index */
/* Set up information for dataset region */
/* Return any previous heap block to the free list if we are garbage collecting */
if(H5F_GC_REF(loc->oloc->file)) {
/* Check for an existing heap ID in the reference */
for(u = 0, heapid_found = 0, p = (uint8_t *)ref; u < H5R_DSET_REG_REF_BUF_SIZE; u++)
if(p[u] != 0) {
heapid_found = 1;
break;
} /* end if */
if(heapid_found != 0) {
/* Return heap block to free list */
} /* end if */
} /* end if */
/* Zero the heap ID out, may leak heap space if user is re-using reference and doesn't have garbage collection on */
HDmemset(ref, 0, H5R_DSET_REG_REF_BUF_SIZE);
/* Get the amount of space required to serialize the selection */
if((buf_size = H5S_SELECT_SERIAL_SIZE(space)) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "Invalid amount of space for serializing selection")
/* Increase buffer size to allow for the dataset OID */
buf_size += (hssize_t)sizeof(haddr_t);
/* Allocate the space to store the serialized information */
H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
if(NULL == (buf = (uint8_t *)H5MM_malloc((size_t)buf_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
/* Serialize information for dataset OID into heap buffer */
p = (uint8_t *)buf;
H5F_addr_encode(loc->oloc->file, &p, obj_loc.oloc->addr);
/* Serialize the selection into heap buffer */
if(H5S_SELECT_SERIALIZE(space, &p) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Unable to serialize selection")
/* Save the serialized buffer for later */
H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
if(H5HG_insert(loc->oloc->file, dxpl_id, (size_t)buf_size, buf, &hobjid) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_WRITEERROR, FAIL, "Unable to serialize selection")
/* Serialize the heap ID and index for storage in the file */
p = (uint8_t *)ref;
H5F_addr_encode(loc->oloc->file, &p, hobjid.addr);
UINT32ENCODE(p, hobjid.idx);
/* Free the buffer we serialized data in */
H5MM_xfree(buf);
break;
}
case H5R_BADTYPE:
case H5R_MAXTYPE:
default:
HDassert("unknown reference type" && 0);
HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
} /* end switch */
done:
if(obj_found)
H5G_loc_free(&obj_loc);
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5R_create() */
/*--------------------------------------------------------------------------
NAME
H5Rcreate
PURPOSE
Creates a particular kind of reference for the user
USAGE
herr_t H5Rcreate(ref, loc_id, name, ref_type, space_id)
void *ref; OUT: Reference created
hid_t loc_id; IN: Location ID used to locate object pointed to
const char *name; IN: Name of object at location LOC_ID of object
pointed to
H5R_type_t ref_type; IN: Type of reference to create
hid_t space_id; IN: Dataspace ID with selection, used for Dataset
Region references.
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Creates a particular type of reference specified with REF_TYPE, in the
space pointed to by REF. The LOC_ID and NAME are used to locate the object
pointed to and the SPACE_ID is used to choose the region pointed to (for
Dataset Region references).
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5Rcreate(void *ref, hid_t loc_id, const char *name, H5R_type_t ref_type, hid_t space_id)
{
H5G_loc_t loc; /* File location */
H5S_t *space = NULL; /* Pointer to dataspace containing region */
herr_t ret_value; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE5("e", "*xi*sRti", ref, loc_id, name, ref_type, space_id);
/* Check args */
if(ref == NULL)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
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 given")
if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
if(ref_type != H5R_OBJECT && ref_type != H5R_DATASET_REGION)
HGOTO_ERROR(H5E_ARGS, H5E_UNSUPPORTED, FAIL, "reference type not supported")
if(space_id == (-1) && ref_type == H5R_DATASET_REGION)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "reference region dataspace id must be valid")
if(space_id != (-1) && (NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE))))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
/* Create reference */
if((ret_value = H5R_create(ref, &loc, name, ref_type, space, H5AC_ind_read_dxpl_id)) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to create reference")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Rcreate() */
/*--------------------------------------------------------------------------
NAME
H5R_dereference
PURPOSE
Opens the HDF5 object referenced.
USAGE
hid_t H5R_dereference(ref)
H5F_t *file; IN: File the object being dereferenced is within
H5R_type_t ref_type; IN: Type of reference
void *ref; IN: Reference to open.
RETURNS
Valid ID on success, Negative on failure
DESCRIPTION
Given a reference to some object, open that object and return an ID for
that object.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
Currently only set up to work with references to datasets
EXAMPLES
REVISION LOG
Raymond Lu
13 July 2011
I added the OAPL_ID parameter for the object being referenced. It only
supports dataset access property list currently.
M. Scot Breitenfeld
3 March 2015
Added a check for undefined reference pointer.
--------------------------------------------------------------------------*/
hid_t
H5R_dereference(H5F_t *file, hid_t oapl_id, hid_t dxpl_id, H5R_type_t ref_type, const void *_ref, hbool_t app_ref)
{
H5O_loc_t oloc; /* Object location */
H5G_name_t path; /* Path of object */
H5G_loc_t loc; /* Group location */
unsigned rc; /* Reference count of object */
H5O_type_t obj_type; /* Type of object */
hid_t ret_value = H5I_INVALID_HID; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
HDassert(_ref);
HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
HDassert(file);
/* Initialize the object location */
H5O_loc_reset(&oloc);
oloc.file = file;
switch(ref_type) {
case H5R_OBJECT:
oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
if(!H5F_addr_defined(oloc.addr) || oloc.addr == 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer")
break;
case H5R_DATASET_REGION:
{
H5HG_t hobjid; /* Heap object ID */
uint8_t *buf; /* Buffer to store serialized selection in */
const uint8_t *p; /* Pointer to OID to store */
/* Get the heap ID for the dataset region */
p = (const uint8_t *)_ref;
H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
UINT32DECODE(p, hobjid.idx);
if(!H5F_addr_defined(hobjid.addr) || hobjid.addr == 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer")
/* Get the dataset region from the heap (allocate inside routine) */
if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)))
HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
/* Get the object oid for the dataset */
p = buf;
H5F_addr_decode(oloc.file, &p, &(oloc.addr));
/* Free the buffer allocated in H5HG_read() */
H5MM_xfree(buf);
} /* end case */
break;
case H5R_BADTYPE:
case H5R_MAXTYPE:
default:
HDassert("unknown reference type" && 0);
HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
} /* end switch */
/* Get the # of links for object, and its type */
/* (To check to make certain that this object hasn't been deleted since the reference was created) */
if(H5O_get_rc_and_type(&oloc, dxpl_id, &rc, &obj_type) < 0 || 0 == rc)
HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
/* Construct a group location for opening the object */
H5G_name_reset(&path);
loc.oloc = &oloc;
loc.path = &path;
/* Open the object */
switch(obj_type) {
case H5O_TYPE_GROUP:
{
H5G_t *group; /* Pointer to group to open */
if(NULL == (group = H5G_open(&loc, dxpl_id)))
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "not found")
/* Create an atom for the group */
if((ret_value = H5I_register(H5I_GROUP, group, app_ref)) < 0) {
H5G_close(group);
HGOTO_ERROR(H5E_SYM, H5E_CANTREGISTER, FAIL, "can't register group")
} /* end if */
} /* end case */
break;
case H5O_TYPE_NAMED_DATATYPE:
{
H5T_t *type; /* Pointer to datatype to open */
if(NULL == (type = H5T_open(&loc, dxpl_id)))
HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "not found")
/* Create an atom for the datatype */
if((ret_value = H5I_register(H5I_DATATYPE, type, app_ref)) < 0) {
H5T_close(type);
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "can't register datatype")
} /* end if */
} /* end case */
break;
case H5O_TYPE_DATASET:
{
H5D_t *dset; /* Pointer to dataset to open */
/* Open the dataset */
if(NULL == (dset = H5D_open(&loc, oapl_id, dxpl_id)))
HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, FAIL, "not found")
/* Create an atom for the dataset */
if((ret_value = H5I_register(H5I_DATASET, dset, app_ref)) < 0) {
H5D_close(dset);
HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "can't register dataset")
} /* end if */
} /* end case */
break;
case H5O_TYPE_UNKNOWN:
case H5O_TYPE_NTYPES:
default:
HGOTO_ERROR(H5E_REFERENCE, H5E_BADTYPE, FAIL, "can't identify type of object referenced")
} /* end switch */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5R_dereference() */
/*--------------------------------------------------------------------------
NAME
H5Rdereference2
PURPOSE
Opens the HDF5 object referenced.
USAGE
hid_t H5Rdereference2(ref)
hid_t id; IN: Dataset reference object is in or location ID of
object that the dataset is located within.
hid_t oapl_id; IN: Property list of the object being referenced.
H5R_type_t ref_type; IN: Type of reference to create
void *ref; IN: Reference to open.
RETURNS
Valid ID on success, Negative on failure
DESCRIPTION
Given a reference to some object, open that object and return an ID for
that object.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
Raymond Lu
13 July 2011
I added the OAPL_ID parameter for the object being referenced. It only
supports dataset access property list currently.
--------------------------------------------------------------------------*/
hid_t
H5Rdereference2(hid_t obj_id, hid_t oapl_id, H5R_type_t ref_type, const void *_ref)
{
H5G_loc_t loc; /* Group location */
H5F_t *file = NULL; /* File object */
hid_t dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
hid_t ret_value;
FUNC_ENTER_API(FAIL)
H5TRACE4("i", "iiRt*x", obj_id, oapl_id, ref_type, _ref);
/* Check args */
if(H5G_loc(obj_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(oapl_id < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
if(_ref == NULL)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
/* Verify access property list and get correct dxpl */
if(H5P_verify_apl_and_dxpl(&oapl_id, H5P_CLS_DACC, &dxpl_id, obj_id, FALSE) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
/* Get the file pointer from the entry */
file = loc.oloc->file;
/* Create reference */
if((ret_value = H5R_dereference(file, oapl_id, dxpl_id, ref_type, _ref, TRUE)) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to dereference object")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Rdereference2() */
/*--------------------------------------------------------------------------
NAME
H5R_get_region
PURPOSE
Retrieves a dataspace with the region pointed to selected.
USAGE
H5S_t *H5R_get_region(file, ref_type, ref)
H5F_t *file; IN: File the object being dereferenced is within
void *ref; IN: Reference to open.
RETURNS
Pointer to the dataspace on success, NULL on failure
DESCRIPTION
Given a reference to some object, creates a copy of the dataset pointed
to's dataspace and defines a selection in the copy which is the region
pointed to.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
static H5S_t *
H5R_get_region(H5F_t *file, hid_t dxpl_id, const void *_ref)
{
H5O_loc_t oloc; /* Object location */
const uint8_t *p; /* Pointer to OID to store */
H5HG_t hobjid; /* Heap object ID */
uint8_t *buf = NULL; /* Buffer to store serialized selection in */
H5S_t *ret_value;
FUNC_ENTER_NOAPI_NOINIT
HDassert(_ref);
HDassert(file);
/* Initialize the object location */
H5O_loc_reset(&oloc);
oloc.file = file;
/* Get the heap ID for the dataset region */
p = (const uint8_t *)_ref;
H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
UINT32DECODE(p, hobjid.idx);
/* Get the dataset region from the heap (allocate inside routine) */
if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, NULL, "Unable to read dataset region information")
/* Get the object oid for the dataset */
p = buf;
H5F_addr_decode(oloc.file, &p, &(oloc.addr));
/* Open and copy the dataset's dataspace */
if((ret_value = H5S_read(&oloc, dxpl_id)) == NULL)
HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, NULL, "not found")
/* Unserialize the selection */
if(H5S_SELECT_DESERIALIZE(&ret_value, &p) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, NULL, "can't deserialize selection")
done:
/* Free the buffer allocated in H5HG_read() */
if(buf)
H5MM_xfree(buf);
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5R_get_region() */
/*--------------------------------------------------------------------------
NAME
H5Rget_region
PURPOSE
Retrieves a dataspace with the region pointed to selected.
USAGE
hid_t H5Rget_region(id, ref_type, ref)
hid_t id; IN: Dataset reference object is in or location ID of
object that the dataset is located within.
H5R_type_t ref_type; IN: Type of reference to get region of
void *ref; IN: Reference to open.
RETURNS
Valid ID on success, Negative on failure
DESCRIPTION
Given a reference to some object, creates a copy of the dataset pointed
to's dataspace and defines a selection in the copy which is the region
pointed to.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
hid_t
H5Rget_region(hid_t id, H5R_type_t ref_type, const void *ref)
{
H5G_loc_t loc; /* Object's group location */
H5S_t *space = NULL; /* Dataspace object */
hid_t ret_value;
FUNC_ENTER_API(FAIL)
H5TRACE3("i", "iRt*x", id, ref_type, ref);
/* Check args */
if(H5G_loc(id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(ref_type != H5R_DATASET_REGION)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
if(ref == NULL)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
/* Get the dataspace with the correct region selected */
if((space = H5R_get_region(loc.oloc->file, H5AC_ind_read_dxpl_id, ref)) == NULL)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCREATE, FAIL, "unable to create dataspace")
/* Atomize */
if((ret_value = H5I_register(H5I_DATASPACE, space, TRUE)) < 0)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace atom")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Rget_region() */
/*--------------------------------------------------------------------------
NAME
H5R_get_obj_type
PURPOSE
Retrieves the type of object that an object reference points to
USAGE
H5O_type_t H5R_get_obj_type(file, ref_type, ref)
H5F_t *file; IN: File the object being dereferenced is within
H5R_type_t ref_type; IN: Type of reference to query
void *ref; IN: Reference to query.
RETURNS
Success: An object type defined in H5Gpublic.h
Failure: H5G_UNKNOWN
DESCRIPTION
Given a reference to some object, this function returns the type of object
pointed to.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5R_get_obj_type(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type,
const void *_ref, H5O_type_t *obj_type)
{
H5O_loc_t oloc; /* Object location */
unsigned rc; /* Reference count of object */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
HDassert(file);
HDassert(_ref);
/* Initialize the symbol table entry */
H5O_loc_reset(&oloc);
oloc.file = file;
switch(ref_type) {
case H5R_OBJECT:
/* Get the object oid */
oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
break;
case H5R_DATASET_REGION:
{
H5HG_t hobjid; /* Heap object ID */
const uint8_t *p; /* Pointer to reference to decode */
uint8_t *buf; /* Buffer to store serialized selection in */
/* Get the heap ID for the dataset region */
p = (const uint8_t *)_ref;
H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
UINT32DECODE(p, hobjid.idx);
/* Get the dataset region from the heap (allocate inside routine) */
if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
/* Get the object oid for the dataset */
p = buf;
H5F_addr_decode(oloc.file, &p, &(oloc.addr));
/* Free the buffer allocated in H5HG_read() */
H5MM_xfree(buf);
} /* end case */
break;
case H5R_BADTYPE:
case H5R_MAXTYPE:
default:
HDassert("unknown reference type" && 0);
HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
} /* end switch */
/* Get the # of links for object, and its type */
/* (To check to make certain that this object hasn't been deleted since the reference was created) */
if(H5O_get_rc_and_type(&oloc, dxpl_id, &rc, obj_type) < 0 || 0 == rc)
HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5R_get_obj_type() */
/*--------------------------------------------------------------------------
NAME
H5Rget_obj_type2
PURPOSE
Retrieves the type of object that an object reference points to
USAGE
herr_t H5Rget_obj_type2(id, ref_type, ref, obj_type)
hid_t id; IN: Dataset reference object is in or location ID of
object that the dataset is located within.
H5R_type_t ref_type; IN: Type of reference to query
void *ref; IN: Reference to query.
H5O_type_t *obj_type; OUT: Type of object reference points to
RETURNS
Non-negative on success/Negative on failure
DESCRIPTION
Given a reference to some object, this function retrieves the type of
object pointed to.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
herr_t
H5Rget_obj_type2(hid_t id, H5R_type_t ref_type, const void *ref,
H5O_type_t *obj_type)
{
H5G_loc_t loc; /* Object location */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE4("e", "iRt*x*Ot", id, ref_type, ref, obj_type);
/* Check args */
if(H5G_loc(id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
if(ref == NULL)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
/* Get the object information */
if(H5R_get_obj_type(loc.oloc->file, H5AC_ind_read_dxpl_id, ref_type, ref, obj_type) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to determine object type")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Rget_obj_type2() */
/*--------------------------------------------------------------------------
NAME
H5R_get_name
PURPOSE
Internal routine to determine a name for the object referenced
USAGE
ssize_t H5R_get_name(f, dxpl_id, ref_type, ref, name, size)
H5F_t *f; IN: Pointer to the file that the reference is pointing
into
hid_t lapl_id; IN: LAPL to use for operation
hid_t dxpl_id; IN: DXPL to use for operation
hid_t id; IN: Location ID given for reference
H5R_type_t ref_type; IN: Type of reference
void *ref; IN: Reference to query.
char *name; OUT: Buffer to place name of object referenced
size_t size; IN: Size of name buffer
RETURNS
Non-negative length of the path on success, Negative on failure
DESCRIPTION
Given a reference to some object, determine a path to the object
referenced in the file.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
This may not be the only path to that object.
EXAMPLES
REVISION LOG
--------------------------------------------------------------------------*/
static ssize_t
H5R_get_name(H5F_t *f, hid_t lapl_id, hid_t dxpl_id, hid_t id, H5R_type_t ref_type,
const void *_ref, char *name, size_t size)
{
hid_t file_id = H5I_INVALID_HID; /* ID for file that the reference is in */
H5O_loc_t oloc; /* Object location describing object for reference */
ssize_t ret_value = -1; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
/* Check args */
HDassert(f);
HDassert(_ref);
/* Initialize the object location */
H5O_loc_reset(&oloc);
oloc.file = f;
/* Get address for reference */
switch(ref_type) {
case H5R_OBJECT:
oloc.addr = *(const hobj_ref_t *)_ref;
break;
case H5R_DATASET_REGION:
{
H5HG_t hobjid; /* Heap object ID */
uint8_t *buf; /* Buffer to store serialized selection in */
const uint8_t *p; /* Pointer to OID to store */
/* Get the heap ID for the dataset region */
p = (const uint8_t *)_ref;
H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
UINT32DECODE(p, hobjid.idx);
/* Get the dataset region from the heap (allocate inside routine) */
if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
/* Get the object oid for the dataset */
p = buf;
H5F_addr_decode(oloc.file, &p, &(oloc.addr));
/* Free the buffer allocated in H5HG_read() */
H5MM_xfree(buf);
} /* end case */
break;
case H5R_BADTYPE:
case H5R_MAXTYPE:
default:
HDassert("unknown reference type" && 0);
HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
} /* end switch */
/* Retrieve file ID for name search */
if((file_id = H5I_get_file_id(id, FALSE)) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't retrieve file ID")
/* Get name, length, etc. */
if((ret_value = H5G_get_name_by_addr(file_id, lapl_id, dxpl_id, &oloc, name, size)) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't determine name")
done:
/* Close file ID used for search */
if(file_id > 0 && H5I_dec_ref(file_id) < 0)
HDONE_ERROR(H5E_REFERENCE, H5E_CANTDEC, FAIL, "can't decrement ref count of temp ID")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5R_get_name() */
/*--------------------------------------------------------------------------
NAME
H5Rget_name
PURPOSE
Determines a name for the object referenced
USAGE
ssize_t H5Rget_name(loc_id, ref_type, ref, name, size)
hid_t loc_id; IN: Dataset reference object is in or location ID of
object that the dataset is located within.
H5R_type_t ref_type; IN: Type of reference
void *ref; IN: Reference to query.
char *name; OUT: Buffer to place name of object referenced. If NULL
then this call will return the size in bytes of name.
size_t size; IN: Size of name buffer (user needs to include NULL terminator
when passing in the size)
RETURNS
Non-negative length of the path on success, Negative on failure
DESCRIPTION
Given a reference to some object, determine a path to the object
referenced in the file.
GLOBAL VARIABLES
COMMENTS, BUGS, ASSUMPTIONS
This may not be the only path to that object.
EXAMPLES
REVISION LOG
M. Scot Breitenfeld
22 January 2014
Changed the behavior for the returned value of the function when name is NULL.
If name is NULL then size is ignored and the function returns the size
of the name buffer (not including the NULL terminator), it still returns
negative on failure.
--------------------------------------------------------------------------*/
ssize_t
H5Rget_name(hid_t id, H5R_type_t ref_type, const void *_ref, char *name,
size_t size)
{
H5G_loc_t loc; /* Group location */
H5F_t *file; /* File object */
ssize_t ret_value; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE5("Zs", "iRt*x*sz", id, ref_type, _ref, name, size);
/* Check args */
if(H5G_loc(id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
if(_ref == NULL)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
/* Get the file pointer from the entry */
file = loc.oloc->file;
/* Get name */
if((ret_value = H5R_get_name(file, H5P_DEFAULT, H5AC_ind_read_dxpl_id, id, ref_type, _ref, name, size)) < 0)
HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to determine object path")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Rget_name() */
Reference in New Issue View Git Blame Copy Permalink