/**************************************************************************** * 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 /* Atoms */ #include /* Cache */ #include /* Templates */ #include /* Dataset functions */ #include /* Error handling */ #include /* Group headers */ #include /* Meta data */ #include /* File space allocation header */ #include /* Memory management */ #include /* Meta-Object API */ #include /* Object headers */ #define PABLO_MASK H5D_mask /* * A dataset is the following struct. */ struct H5D_t { H5G_entry_t ent; /*cached object header stuff */ H5T_t *type; /*datatype of this dataset */ H5P_t *space; /*dataspace of this dataset */ H5D_create_t create_parms; /*creation parameters */ H5O_layout_t layout; /*data layout */ }; /* Default dataset creation template */ const H5D_create_t H5D_create_dflt = { H5D_CONTIGUOUS, /* Layout */ 1, /* Chunk dimensions */ {1, 1, 1, 1, 1, 1, 1, 1, /* Chunk size. These default values....*/ 1, 1, 1, 1, 1, 1, 1, 1, /*...are quite useless. Larger chunks..*/ 1, 1, 1, 1, 1, 1, 1, 1, /*...produce fewer, but larger I/O......*/ 1, 1, 1, 1, 1, 1, 1, 1}, /*...requests. */ }; /* Default dataset transfer template */ const H5D_xfer_t H5D_xfer_dflt = { 0, /* Place holder - remove this later */ }; /* Interface initialization? */ static hbool_t interface_initialize_g = FALSE; #define INTERFACE_INIT H5D_init_interface static herr_t H5D_init_interface(void); static void H5D_term_interface (void); /*-------------------------------------------------------------------------- NAME H5D_init_interface -- Initialize interface-specific information USAGE herr_t H5D_init_interface() RETURNS SUCCEED/FAIL DESCRIPTION Initializes any interface-specific data or routines. --------------------------------------------------------------------------*/ static herr_t H5D_init_interface (void) { herr_t ret_value = SUCCEED; FUNC_ENTER (H5D_init_interface, FAIL); /* Initialize the atom group for the dataset IDs */ if ((ret_value=H5Ainit_group (H5_DATASET, H5A_DATASETID_HASHSIZE, H5D_RESERVED_ATOMS, (herr_t (*)(void*))H5D_close))!=FAIL) { ret_value = H5_add_exit (H5D_term_interface); } FUNC_LEAVE (ret_value); } /*-------------------------------------------------------------------------- NAME H5D_term_interface PURPOSE Terminate various H5D objects USAGE void H5D_term_interface() RETURNS SUCCEED/FAIL DESCRIPTION Release the atom group and any other resources allocated. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS Can't report errors... EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ static void H5D_term_interface (void) { H5Adestroy_group (H5_DATASET); } /*------------------------------------------------------------------------- * Function: H5Dcreate * * Purpose: Creates a new dataset named NAME in file FILE_ID, opens the * dataset for access, and associates with that dataset constant * and initial persistent properties including the type of each * datapoint as stored in the file (TYPE_ID), the size of the * dataset (SPACE_ID), and other initial miscellaneous * properties (CREATE_PARMS_ID). * * All arguments are copied into the dataset, so the caller is * allowed to derive new types, data spaces, and creation * parameters from the old ones and reuse them in calls to * create other datasets. * * Return: Success: The object ID of the new dataset. At this * point, the dataset is ready to receive its * raw data. Attempting to read raw data from * the dataset will probably return the fill * value. The dataset should be closed when * the caller is no longer interested in it. * * Failure: FAIL * * Errors: * ARGS BADTYPE Not a data space. * ARGS BADTYPE Not a dataset creation template. * ARGS BADTYPE Not a file. * ARGS BADTYPE Not a type. * ARGS BADVALUE No name. * DATASET CANTINIT Can't create dataset. * DATASET CANTREGISTER Can't register dataset. * * Programmer: Robb Matzke * Wednesday, December 3, 1997 * * Modifications: * *------------------------------------------------------------------------- */ hid_t H5Dcreate (hid_t file_id, const char *name, hid_t type_id, hid_t space_id, hid_t create_parms_id) { H5F_t *f = NULL; H5T_t *type = NULL; H5P_t *space = NULL; H5D_t *new_dset = NULL; hid_t ret_value = FAIL; const H5D_create_t *create_parms = NULL; FUNC_ENTER (H5Dcreate, FAIL); H5ECLEAR; /* check arguments */ if (H5_FILE!=H5Aatom_group (file_id) || NULL==(f=H5Aatom_object (file_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a file"); } if (!name || !*name) { HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "no name"); } if (H5_DATATYPE!=H5Aatom_group (type_id) || NULL==(type=H5Aatom_object (type_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a type"); } if (H5_DATASPACE!=H5Aatom_group (space_id) || NULL==(space=H5Aatom_object (space_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space"); } if (create_parms_id>=0) { if (H5C_DATASET_CREATE!=H5Cget_class (create_parms_id) || NULL==(create_parms=H5Aatom_object (create_parms_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset creation template"); } } else { create_parms = &H5D_create_dflt; } /* build and open the new dataset */ if (NULL==(new_dset=H5D_create (f, name, type, space, create_parms))) { HRETURN_ERROR (H5E_DATASET, H5E_CANTINIT, FAIL, "can't create dataset"); } /* Register the new datatype and get an ID for it */ if ((ret_value=H5Aregister_atom (H5_DATASET, new_dset))<0) { H5D_close (new_dset); HRETURN_ERROR (H5E_DATASET, H5E_CANTREGISTER, FAIL, "can't register dataset"); } FUNC_LEAVE (ret_value); } /*------------------------------------------------------------------------- * Function: H5Dopen * * Purpose: Finds a dataset named NAME in file FILE_ID, opens it, and * returns its ID. The dataset should be close when the caller * is no longer interested in it. * * Return: Success: A new dataset ID * * Failure: FAIL * * Errors: * ARGS BADTYPE Not a file. * ARGS BADVALUE No name. * DATASET CANTREGISTER Can't register dataset. * DATASET NOTFOUND Dataset not found. * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ hid_t H5Dopen (hid_t file_id, const char *name) { H5F_t *file = NULL; /*file holding the dataset */ H5D_t *dataset = NULL; /*the dataset */ hid_t ret_value = FAIL; FUNC_ENTER (H5Dopen, FAIL); H5ECLEAR; /* Check args */ if (H5_FILE!=H5Aatom_group (file_id) || NULL==(file=H5Aatom_object (file_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a file"); } if (!name || !*name) { HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "no name"); } /* Find the dataset */ if (NULL==(dataset=H5D_open (file, name))) { HRETURN_ERROR (H5E_DATASET, H5E_NOTFOUND, FAIL, "dataset not found"); } /* Create an atom for the dataset */ if ((ret_value=H5Aregister_atom (H5_DATASET, dataset))<0) { H5D_close (dataset); HRETURN_ERROR (H5E_DATASET, H5E_CANTREGISTER, FAIL, "can't register dataset"); } FUNC_LEAVE (ret_value); } /*------------------------------------------------------------------------- * Function: H5Dclose * * Purpose: Closes access to a dataset (DATASET_ID) and releases * resources used by it. It is illegal to subsequently use that * same dataset ID in calls to other dataset functions. * * Return: Success: SUCCEED * * Failure: FAIL * * Errors: * ARGS BADTYPE Not a dataset. * DATASET CANTINIT Can't free. * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5Dclose (hid_t dataset_id) { H5D_t *dataset = NULL; /* dataset object to release */ FUNC_ENTER (H5Dclose, FAIL); H5ECLEAR; /* Check args */ if (H5_DATASET!=H5Aatom_group (dataset_id) || NULL==(dataset=H5Aatom_object (dataset_id)) || NULL==dataset->ent.file) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset"); } /* * Decrement the counter on the dataset. It will be freed if the count * reaches zero. */ if (H5A_dec_ref (dataset_id)<0) { HRETURN_ERROR (H5E_DATASET, H5E_CANTINIT, FAIL, "can't free"); } FUNC_LEAVE (SUCCEED); } /*------------------------------------------------------------------------- * Function: H5Dread * * Purpose: Reads (part of) a DATASET from the file into application * memory BUF. The part of the dataset to read is defined with * MEM_SPACE_ID and FILE_SPACE_ID. The data points are * converted from their file type to the MEM_TYPE_ID specified. * Additional miscellaneous data transfer properties can be * passed to this function with the XFER_PARMS_ID argument. * * The FILE_SPACE_ID can be the constant H5P_ALL which indicates * that the entire file data space is to be referenced. * * The MEM_SPACE_ID can be the constant H5P_ALL in which case * the memory data space is the same as the file data space * defined when the dataset was created. * * The number of elements in the memory data space must match * the number of elements in the file data space. * * The XFER_PARMS_ID can be the constant H5C_DEFAULT in which * case the default data transfer properties are used. * * Return: Success: SUCCEED * * Failure: FAIL * * Errors: * ARGS BADTYPE Not a data space. * ARGS BADTYPE Not a data type. * ARGS BADTYPE Not a dataset. * ARGS BADTYPE Not xfer parms. * ARGS BADVALUE No output buffer. * DATASET READERROR Can't read data. * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5Dread (hid_t dataset_id, hid_t mem_type_id, hid_t mem_space_id, hid_t file_space_id, hid_t xfer_parms_id, void *buf/*out*/) { H5D_t *dataset = NULL; const H5T_t *mem_type = NULL; const H5P_t *mem_space = NULL; const H5P_t *file_space = NULL; const H5D_xfer_t *xfer_parms = NULL; FUNC_ENTER (H5Dread, FAIL); H5ECLEAR; /* check arguments */ if (H5_DATASET!=H5Aatom_group (dataset_id) || NULL==(dataset=H5Aatom_object (dataset_id)) || NULL==dataset->ent.file) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset"); } if (H5_DATATYPE!=H5Aatom_group (mem_type_id) || NULL==(mem_type=H5Aatom_object (mem_type_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type"); } if (H5P_ALL!=mem_space_id) { if (H5_DATASPACE!=H5Aatom_group (mem_space_id) || NULL==(mem_space=H5Aatom_object (mem_space_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space"); } } if (H5P_ALL!=file_space_id) { if (H5_DATASPACE!=H5Aatom_group (file_space_id) || NULL==(file_space=H5Aatom_object (file_space_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space"); } } if (H5C_DEFAULT==xfer_parms_id) { xfer_parms = &H5D_xfer_dflt; } else if (H5C_DATASET_XFER!=H5Cget_class (xfer_parms_id) || NULL==(xfer_parms=H5Aatom_object (xfer_parms_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not xfer parms"); } if (!buf) { HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "no output buffer"); } /* read raw data */ if (H5D_read (dataset, mem_type, mem_space, file_space, xfer_parms, buf/*out*/)<0) { HRETURN_ERROR (H5E_DATASET, H5E_READERROR, FAIL, "can't read data"); } FUNC_LEAVE (SUCCEED); } /*------------------------------------------------------------------------- * Function: H5Dwrite * * Purpose: Writes (part of) a DATASET from application memory BUF to the * file. The part of the dataset to write is defined with the * MEM_SPACE_ID and FILE_SPACE_ID arguments. The data points * are converted from their current type (MEM_TYPE_ID) to their * file data type. Additional miscellaneous data transfer * properties can be passed to this function with the * XFER_PARMS_ID argument. * * The FILE_SPACE_ID can be the constant H5P_ALL which indicates * that the entire file data space is to be referenced. * * The MEM_SPACE_ID can be the constant H5P_ALL in which case * the memory data space is the same as the file data space * defined when the dataset was created. * * The number of elements in the memory data space must match * the number of elements in the file data space. * * The XFER_PARMS_ID can be the constant H5C_DEFAULT in which * case the default data transfer properties are used. * * Return: Success: SUCCEED * * Failure: FAIL * * Errors: * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5Dwrite (hid_t dataset_id, hid_t mem_type_id, hid_t mem_space_id, hid_t file_space_id, hid_t xfer_parms_id, const void *buf) { H5D_t *dataset = NULL; const H5T_t *mem_type = NULL; const H5P_t *mem_space = NULL; const H5P_t *file_space = NULL; const H5D_xfer_t *xfer_parms = NULL; FUNC_ENTER (H5Dwrite, FAIL); H5ECLEAR; /* check arguments */ if (H5_DATASET!=H5Aatom_group (dataset_id) || NULL==(dataset=H5Aatom_object (dataset_id)) || NULL==dataset->ent.file) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset"); } if (H5_DATATYPE!=H5Aatom_group (mem_type_id) || NULL==(mem_type=H5Aatom_object (mem_type_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type"); } if (H5P_ALL!=mem_space_id) { if (H5_DATASPACE!=H5Aatom_group (mem_space_id) || NULL==(mem_space=H5Aatom_object (mem_space_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space"); } } if (H5P_ALL!=file_space_id) { if (H5_DATASPACE!=H5Aatom_group (file_space_id) || NULL==(file_space=H5Aatom_object (file_space_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space"); } } if (H5C_DEFAULT==xfer_parms_id) { xfer_parms = &H5D_xfer_dflt; } else if (H5C_DATASET_XFER!=H5Cget_class (xfer_parms_id) || NULL==(xfer_parms=H5Aatom_object (xfer_parms_id))) { HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not xfer parms"); } if (!buf) { HRETURN_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "no output buffer"); } /* write raw data */ if (H5D_write (dataset, mem_type, mem_space, file_space, xfer_parms, buf)<0) { HRETURN_ERROR (H5E_DATASET, H5E_READERROR, FAIL, "can't write data"); } FUNC_LEAVE (SUCCEED); } /*------------------------------------------------------------------------- * Function: H5D_find_name * * Purpose: This is a callback for H5Mfind_name(). It does the same * thing as H5Dopen() except it takes an extra argument which * isn't used. * * Return: Success: SUCCEED * * Failure: FAIL * * Errors: * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ hid_t H5D_find_name (hid_t file_id, group_t UNUSED, const char *name) { return H5Dopen (file_id, name); } /*------------------------------------------------------------------------- * Function: H5D_create * * Purpose: Creates a new dataset with name NAME in file F and associates * with it a datatype TYPE for each element as stored in the * file, dimensionality information or dataspace SPACE, and * other miscellaneous properties CREATE_PARMS. All arguments * are deep-copied before being associated with the new dataset, * so the caller is free to subsequently modify them without * affecting the dataset. * * Return: Success: Pointer to a new dataset * * Failure: NULL * * Errors: * DATASET CANTINIT Can't update dataset header. * DATASET CANTINIT Problem with the dataset name. * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ H5D_t * H5D_create (H5F_t *f, const char *name, const H5T_t *type, const H5P_t *space, const H5D_create_t *create_parms) { H5D_t *new_dset = NULL; H5D_t *ret_value = NULL; size_t nbytes; intn i; FUNC_ENTER (H5D_create, NULL); /* check args */ assert (f); assert (name && *name); assert (type); assert (space); assert (create_parms); /* Initialize the dataset object */ new_dset = H5MM_xcalloc (1, sizeof(H5D_t)); H5F_addr_undef (&(new_dset->ent.header)); new_dset->type = H5T_copy (type); new_dset->space = H5P_copy (space); new_dset->create_parms = *create_parms; /* * Create (open for write access) an object header. */ if (H5O_create (f, 0, &(new_dset->ent))<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, NULL, "unable to create dataset object header"); } /* Update the type and space header messages */ if (H5O_modify (&(new_dset->ent), H5O_DTYPE, 0, 0, new_dset->type)<0 || H5P_modify (f, &(new_dset->ent), new_dset->space)<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, NULL, "can't update type or space header messages"); } /* Total raw data size */ nbytes = H5T_get_size (type) * H5P_get_npoints (space); new_dset->layout.type = new_dset->create_parms.layout; new_dset->layout.ndims = H5P_get_ndims (space) + 1; assert (new_dset->layout.ndims<=NELMTS (new_dset->layout.dim)); new_dset->layout.dim[new_dset->layout.ndims-1] = H5T_get_size (type); switch (new_dset->create_parms.layout) { case H5D_CONTIGUOUS: if (H5P_get_dims (space, new_dset->layout.dim)<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, NULL, "unable to initialize contiguous storage"); } break; case H5D_CHUNKED: if (new_dset->create_parms.chunk_ndims != H5P_get_ndims (space)) { HGOTO_ERROR (H5E_DATASET, H5E_BADVALUE, NULL, "dimensionality of chunks doesn't match the data space"); } for (i=0; ilayout.ndims-1; i++) { new_dset->layout.dim[i] = new_dset->create_parms.chunk_size[i]; } break; default: HGOTO_ERROR (H5E_DATASET, H5E_UNSUPPORTED, NULL, "not implemented yet"); } /* * Initialize storage */ if (H5F_arr_create (f, &(new_dset->layout))<0 || H5O_modify (&(new_dset->ent), H5O_LAYOUT, 0, 0, &(new_dset->layout))<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, NULL, "unable to initialize storage"); } /* Give the dataset a name */ if (H5G_insert (name, &(new_dset->ent))<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, NULL, "unable to name dataset"); } /* Success */ ret_value = new_dset; done: if (!ret_value && new_dset) { if (new_dset->type) H5T_close (new_dset->type); if (new_dset->space) H5P_close (new_dset->space); if (H5F_addr_defined (&(new_dset->ent.header))) { H5O_close (&(new_dset->ent)); } new_dset->ent.file = NULL; H5MM_xfree (new_dset); } FUNC_LEAVE (ret_value); } /*------------------------------------------------------------------------- * Function: H5D_open * * Purpose: Finds a dataset named NAME in file F and builds a descriptor * for it, opening it for access. * * Return: Success: Pointer to a new dataset descriptor. * * Failure: NULL * * Errors: * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ H5D_t * H5D_open (H5F_t *f, const char *name) { H5D_t *dataset = NULL; /*the dataset which was found */ H5D_t *ret_value = NULL; /*return value */ intn i; FUNC_ENTER (H5D_open, NULL); /* check args */ assert (f); assert (name && *name); dataset = H5MM_xcalloc (1, sizeof(H5D_t)); dataset->create_parms = H5D_create_dflt; H5F_addr_undef (&(dataset->ent.header)); /* Open the dataset object */ if (H5G_find (f, name, NULL, &(dataset->ent))<0) { HGOTO_ERROR (H5E_DATASET, H5E_NOTFOUND, NULL, "not found"); } if (H5O_open (f, &(dataset->ent))<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTOPENOBJ, NULL, "unable to open"); } /* Get the type and space */ if (NULL==(dataset->type=H5O_read (&(dataset->ent), H5O_DTYPE, 0, NULL)) || NULL==(dataset->space=H5P_read (f, &(dataset->ent)))) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, NULL, "can't load type of space info from dataset header"); } /* * Get the raw data layout info. It's actually stored in two locations: * the storage message of the dataset (dataset->storage) and certain * values are copied to the dataset create template so the user can query * them. */ if (H5O_read (&(dataset->ent), H5O_LAYOUT, 0, &(dataset->layout))<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, NULL, "unable to read data layout message"); } switch (dataset->layout.type) { case H5D_CONTIGUOUS: dataset->create_parms.layout = H5D_CONTIGUOUS; break; case H5D_CHUNKED: /* * Chunked storage. The creation template's dimension is one less than * the chunk dimension because the chunk includes a dimension for the * individual bytes of the data type. */ dataset->create_parms.layout = H5D_CHUNKED; dataset->create_parms.chunk_ndims = dataset->layout.ndims - 1; for (i=0; ilayout.ndims-1; i++) { dataset->create_parms.chunk_size[i] = dataset->layout.dim[i]; } break; default: assert ("not implemented yet" && 0); HGOTO_ERROR (H5E_DATASET, H5E_UNSUPPORTED, NULL, "not implemented yet"); } /* Success */ ret_value = dataset; done: if (!ret_value && dataset) { if (H5F_addr_defined (&(dataset->ent.header))) { H5O_close (&(dataset->ent)); } if (dataset->type) H5T_close (dataset->type); if (dataset->space) H5P_close (dataset->space); dataset->ent.file = NULL; H5MM_xfree (dataset); } FUNC_LEAVE (ret_value); } /*------------------------------------------------------------------------- * Function: H5D_close * * Purpose: Insures that all data has been saved to the file, closes the * dataset object header, and frees all resources used by the * descriptor. * * Return: Success: SUCCEED * * Failure: FAIL * * Errors: * DATASET CANTINIT Couldn't free the type or space, * but the dataset was freed anyway. * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5D_close (H5D_t *dataset) { hbool_t free_failed; FUNC_ENTER (H5D_close, FAIL); /* check args */ assert (dataset && dataset->ent.file); /* Close the dataset object */ H5O_close (&(dataset->ent)); /* * Release dataset type and space - there isn't much we can do if one of * these fails, so we just continue. */ free_failed = (H5T_close (dataset->type)<0 || H5P_close (dataset->space)<0); /* * Free memory. Before freeing the memory set the file pointer to NULL. * We always check for a null file pointer in other H5D functions to be * sure we're not accessing an already freed dataset (see the assert() * above). */ dataset->ent.file = NULL; H5MM_xfree (dataset); if (free_failed) { HRETURN_ERROR (H5E_DATASET, H5E_CANTINIT, FAIL, "couldn't free the type or space, but the dataset was " "freed anyway."); } FUNC_LEAVE (SUCCEED); } /*------------------------------------------------------------------------- * Function: H5D_read * * Purpose: Reads (part of) a DATASET into application memory BUF. See * H5Dread() for complete details. * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5D_read (H5D_t *dataset, const H5T_t *mem_type, const H5P_t *mem_space, const H5P_t *file_space, const H5D_xfer_t *xfer_parms, void *buf/*out*/) { size_t nelmts, src_size, dst_size; size_t offset[H5O_LAYOUT_NDIMS]; size_t size[H5O_LAYOUT_NDIMS]; intn i; herr_t ret_value = FAIL; uint8 *conv_buf = NULL; /*data type conv buffer */ H5T_conv_t conv_func = NULL; /*conversion function */ hid_t src_id=-1, dst_id=-1; /*temporary type atoms */ FUNC_ENTER (H5D_read, FAIL); /* check args */ assert (dataset && dataset->ent.file); assert (mem_type); assert (xfer_parms); assert (buf); if ((mem_space && H5P_cmp (mem_space, dataset->space)) || (file_space && H5P_cmp (file_space, dataset->space))) { HGOTO_ERROR (H5E_DATASET, H5E_UNSUPPORTED, FAIL, "space conversion not supported yet"); } /* * Convert data types to atoms because the conversion functions are * application-level functions. */ if ((src_id=H5Aregister_atom (H5_DATATYPE, H5T_copy (dataset->type)))<0 || (dst_id=H5Aregister_atom (H5_DATATYPE, H5T_copy (mem_type)))<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register types for conversion"); } /* Compute the size of the request and allocate scratch buffers */ nelmts = H5P_get_npoints (dataset->space); src_size = nelmts * H5T_get_size (dataset->type); dst_size = nelmts * H5T_get_size (mem_type); conv_buf = H5MM_xmalloc (MAX (src_size, dst_size)); if (NULL==(conv_func=H5T_find (dataset->type, mem_type))) { HGOTO_ERROR (H5E_DATASET, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest data types"); } /* * Read data into the data type conversion buffer. * (We only support complete reads currently) */ for (i=0; ilayout.ndims; i++) { offset[i] = 0; size[i] = dataset->layout.dim[i]; } if (H5F_arr_read (dataset->ent.file, &(dataset->layout), offset, size, conv_buf)<0) { HGOTO_ERROR (H5E_IO, H5E_READERROR, FAIL, "read failed"); } /* * Perform data type conversion. */ if ((conv_func)(src_id, dst_id, nelmts, conv_buf, NULL)<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, FAIL, "data type conversion failed"); } /* * Copy conversion buffer into destination. */ HDmemcpy (buf, conv_buf, dst_size); ret_value = SUCCEED; done: if (src_id>=0) H5A_dec_ref (src_id); if (dst_id>=0) H5A_dec_ref (dst_id); conv_buf = H5MM_xfree (conv_buf); FUNC_LEAVE (ret_value); } /*------------------------------------------------------------------------- * Function: H5D_write * * Purpose: Writes (part of) a DATASET to a file from application memory * BUF. See H5Dwrite() for complete details. * * Return: Success: SUCCEED * * Failure: FAIL * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5D_write (H5D_t *dataset, const H5T_t *mem_type, const H5P_t *mem_space, const H5P_t *file_space, const H5D_xfer_t *xfer_parms, const void *buf) { size_t nelmts, src_size, dst_size; size_t offset[H5O_LAYOUT_NDIMS]; size_t size[H5O_LAYOUT_NDIMS]; intn i; herr_t ret_value = FAIL; uint8 *conv_buf = NULL; /*data type conversion buffer */ H5T_conv_t conv_func = NULL; /*data type conversion function */ hid_t src_id=-1, dst_id=-1; /*temporary type atoms */ FUNC_ENTER (H5D_write, FAIL); /* check args */ assert (dataset && dataset->ent.file); assert (mem_type); assert (xfer_parms); assert (buf); if (H5D_CONTIGUOUS!=dataset->create_parms.layout) { HRETURN_ERROR (H5E_DATASET, H5E_UNSUPPORTED, FAIL, "layout is not supported yet"); } if ((mem_space && H5P_cmp (mem_space, dataset->space)) || (file_space && H5P_cmp (file_space, dataset->space))) { HRETURN_ERROR (H5E_DATASET, H5E_UNSUPPORTED, FAIL, "space conversion not supported yet"); } /* * Convert data types to atoms because the conversion functions are * application-level functions. */ if ((src_id=H5Aregister_atom (H5_DATATYPE, H5T_copy (mem_type)))<0 || (dst_id=H5Aregister_atom (H5_DATATYPE, H5T_copy (dataset->type)))<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register types for conversion"); } /* Compute the size of the request and allocate scratch buffers */ nelmts = H5P_get_npoints (dataset->space); src_size = nelmts * H5T_get_size (mem_type); dst_size = nelmts * H5T_get_size (dataset->type); conv_buf = H5MM_xmalloc (MAX (src_size, dst_size)); if (NULL==(conv_func=H5T_find (mem_type, dataset->type))) { HGOTO_ERROR (H5E_DATASET, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest data types"); } /* * Read data into the data type conversion buffer. */ HDmemcpy (conv_buf, buf, src_size); /* * Perform data type conversion. */ if ((conv_func)(src_id, dst_id, nelmts, conv_buf, NULL)<0) { HGOTO_ERROR (H5E_DATASET, H5E_CANTINIT, FAIL, "data type conversion failed"); } /* * Write data into the file. * (We only support complete writes currently.) */ for (i=0; ilayout.ndims; i++) { offset[i] = 0; size[i] = dataset->layout.dim[i]; } if (H5F_arr_write (dataset->ent.file, &(dataset->layout), offset, size, conv_buf)<0) { HGOTO_ERROR (H5E_IO, H5E_WRITEERROR, FAIL, "write failed"); } ret_value = SUCCEED; done: if (src_id>=0) H5A_dec_ref (src_id); if (dst_id>=0) H5A_dec_ref (dst_id); conv_buf = H5MM_xfree (conv_buf); FUNC_LEAVE (ret_value); }