/**************************************************************************** * NCSA HDF * * Software Development Group * * National Center for Supercomputing Applications * * University of Illinois at Urbana-Champaign * * 605 E. Springfield, Champaign IL 61820 * * * * For conditions of distribution and use, see the accompanying * * hdf/COPYING file. * * * ****************************************************************************/ #ifdef RCSID static char RcsId[] = "@(#)$Revision$"; #endif /* $Id$ */ #include /* Generic Functions */ #include /* ID Functions */ #include /* Datasets */ #include /* Error handling */ #include /* Files */ #include /* Groups */ #include /* Memory Management */ #include /* References */ #include /* Dataspaces */ /* Interface initialization */ #define PABLO_MASK H5R_mask #define INTERFACE_INIT H5R_init_interface static intn interface_initialize_g = FALSE; static herr_t H5R_init_interface(void); static void H5R_term_interface(void); /* Static functions */ static herr_t H5R_create(void *ref, H5G_entry_t *loc, const char *name, H5R_type_t ref_type, H5S_t *space); static hid_t H5R_dereference(H5D_t *dset, H5R_type_t ref_type, void *_ref); static H5S_t * H5R_get_region(void *ref); /*-------------------------------------------------------------------------- NAME H5R_init_interface -- Initialize interface-specific information USAGE herr_t H5R_init_interface() RETURNS Non-negative on success/Negative on failure DESCRIPTION Initializes any interface-specific data or routines. --------------------------------------------------------------------------*/ static herr_t H5R_init_interface(void) { herr_t ret_value = SUCCEED; FUNC_ENTER(H5R_init_interface, FAIL); /* Initialize the atom group for the file IDs */ if ((ret_value = H5I_init_group(H5I_REFERENCE, H5I_REFID_HASHSIZE, H5R_RESERVED_ATOMS, (herr_t (*)(void *)) NULL)) >= 0) { ret_value = H5_add_exit(&H5R_term_interface); } FUNC_LEAVE(ret_value); } /* end H5R_init_interface() */ /*-------------------------------------------------------------------------- NAME H5R_term_interface PURPOSE Terminate various H5R objects USAGE void H5R_term_interface() RETURNS void DESCRIPTION Release the atom group and any other resources allocated. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS Can't report errors... EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static void H5R_term_interface(void) { /* Free ID group */ H5I_destroy_group(H5I_REFERENCE); interface_initialize_g = FALSE; } /* end H5R_term_interface() */ /*-------------------------------------------------------------------------- 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_entry_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_entry_t *loc, const char *name, H5R_type_t ref_type, H5S_t *space) { H5G_stat_t sb; /* Stat buffer for retrieving OID */ herr_t ret_value = FAIL; FUNC_ENTER(H5R_create, FAIL); assert(_ref); assert(loc); assert(name); assert(ref_type>H5R_BADTYPE || ref_typeoid; H5F_addr_pack(loc->file,&addr,&sb.objno[0]); H5F_addr_encode(loc->file,&p,&addr); break; } case H5R_DATASET_REGION: { haddr_t addr; 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 */ /* Set information for dataset OID */ p=(uint8_t *)ref->oid; H5F_addr_pack(loc->file,&addr,&sb.objno[0]); H5F_addr_encode(loc->file,&p,&addr); /* Set up information for dataset region */ ref->region[0]=ref->region[1]=0; /* Zero the heap ID out, may leak heap space if user is re-using reference */ /* 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"); /* Allocate the space to store the serialized information */ if (NULL==(buf = H5MM_malloc(buf_size))) { HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed"); } /* Serialize the selection */ if (H5S_select_serialize(space,buf) < 0) HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Unable to serialize selection"); /* Save the serialized buffer for later */ break; } case H5R_INTERNAL: HRETURN_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "Dataset region and internal references are not supported yet"); case H5R_BADTYPE: case H5R_MAXTYPE: assert("unknown reference type" && 0); HRETURN_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)"); } /* end switch */ /* Return success */ ret_value=SUCCEED; done: FUNC_LEAVE(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_entry_t *loc = NULL; /* File location */ H5S_t *space = NULL; /* Pointer to dataspace containing region */ herr_t ret_value = FAIL; FUNC_ENTER(H5Rcreate, FAIL); H5TRACE5("e","xisRti",ref,loc_id,name,ref_type,space_id); /* Check args */ if(ref==NULL) HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer"); if (NULL==(loc=H5G_loc (loc_id))) HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a location"); if (!name || !*name) HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name given"); if(ref_type<=H5R_BADTYPE || ref_type>=H5R_MAXTYPE) HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type"); if(ref_type!=H5R_OBJECT && ref_type!=H5R_DATASET_REGION) HRETURN_ERROR (H5E_ARGS, H5E_UNSUPPORTED, FAIL, "reference type not supported"); if (space_id!=(-1) && (H5I_DATASPACE!=H5I_get_type (space_id) || NULL==(space=H5I_object (space_id)))) HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace"); /* Create reference */ if ((ret_value=H5R_create(ref,loc,name,ref_type,space))<0) HGOTO_ERROR (H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to create reference"); done: FUNC_LEAVE(ret_value); } /* end H5Rcreate() */ /*-------------------------------------------------------------------------- NAME H5R_dereference PURPOSE Opens the HDF5 object referenced. USAGE hid_t H5R_dereference(ref) H5D_t *dset; IN: Dataset reference object is in. 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 --------------------------------------------------------------------------*/ static hid_t H5R_dereference(H5D_t *dset, H5R_type_t ref_type, void *_ref) { H5D_t *dataset; /* Pointer to dataset to open */ hobj_ref_t *ref=(hobj_ref_t *)_ref; /* Only object references currently supported */ H5G_entry_t ent; /* Symbol table entry */ uint8_t *p; /* Pointer to OID to store */ hid_t ret_value = FAIL; FUNC_ENTER(H5R_dereference, FAIL); assert(ref); assert(ref_type==H5R_OBJECT); /* * Switch on object type, when we implement that feature, always try to * open a dataset for now */ /* Initialize the symbol table entry */ HDmemset(&ent,0,sizeof(H5G_entry_t)); ent.type=H5G_NOTHING_CACHED; ent.file=H5D_get_file(dset); p=(uint8_t *)ref->oid; H5F_addr_decode(ent.file,(const uint8_t **)&p,&(ent.header)); /* Open the dataset object */ if ((dataset=H5D_open_oid(&ent)) == NULL) { HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, FAIL, "not found"); } /* Create an atom for the dataset */ if ((ret_value = H5I_register(H5I_DATASET, dataset)) < 0) { H5D_close(dataset); HRETURN_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "can't register dataset"); } done: FUNC_LEAVE(ret_value); } /* end H5R_dereference() */ /*-------------------------------------------------------------------------- NAME H5Rdereference PURPOSE Opens the HDF5 object referenced. USAGE hid_t H5Rdereference(ref) hid_t dataset; IN: Dataset reference object is in. 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 --------------------------------------------------------------------------*/ hid_t H5Rdereference(hid_t dataset, H5R_type_t ref_type, void *_ref) { H5D_t *dset = NULL; /* dataset object */ hid_t ret_value = FAIL; FUNC_ENTER(H5Rdereference, FAIL); H5TRACE3("i","iRtx",dataset,ref_type,_ref); /* Check args */ if (H5I_DATASET != H5I_get_type(dataset) || NULL == (dset = H5I_object(dataset))) HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset"); if(ref_type<=H5R_BADTYPE || ref_type>=H5R_MAXTYPE) HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type"); if(_ref==NULL) HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer"); /* Create reference */ if ((ret_value=H5R_dereference(dset, ref_type, _ref))<0) HGOTO_ERROR (H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable dereference object"); done: FUNC_LEAVE(ret_value); } /* end H5Rdereference() */ /*-------------------------------------------------------------------------- NAME H5R_get_region PURPOSE Retrieves a dataspace with the region pointed to selected. USAGE H5S_t *H5R_get_region(ref) 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(void __unused__ *ref) { H5S_t *ret_value = NULL; FUNC_ENTER(H5R_get_region, NULL); assert(ref); #ifdef LATER done: #endif /* LATER */ FUNC_LEAVE(ret_value); } /* end H5R_get_region() */ /*-------------------------------------------------------------------------- NAME H5Rget_region PURPOSE Retrieves a dataspace with the region pointed to selected. USAGE hid_t H5Rget_region(ref) 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 dset, H5R_type_t rtype, void *ref) { H5S_t *space = NULL; hid_t ret_value = FAIL; FUNC_ENTER(H5Rget_region, FAIL); H5TRACE3("i","iRtx",dset,rtype,ref); /* Check args */ if(ref==NULL) HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer"); /* Create reference */ if ((space=H5R_get_region(ref))==NULL) HGOTO_ERROR (H5E_REFERENCE, H5E_CANTCREATE, FAIL, "unable to create dataspace"); /* Atomize */ if ((ret_value=H5I_register (H5I_DATASPACE, space))<0) HGOTO_ERROR (H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace atom"); done: FUNC_LEAVE(ret_value); } /* end H5Rget_region() */