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Diffstat (limited to 'src/H5R.c')
| -rw-r--r-- | src/H5R.c | 1050 |
1 files changed, 1050 insertions, 0 deletions
diff --git a/src/H5R.c b/src/H5R.c new file mode 100644 index 0000000..73c1d55 --- /dev/null +++ b/src/H5R.c @@ -0,0 +1,1050 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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() */ + |