/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Copyright by the Board of Trustees of the University of Illinois. * * All rights reserved. * * * * This file is part of HDF5. The full HDF5 copyright notice, including * * terms governing use, modification, and redistribution, is contained in * * the files COPYING and Copyright.html. COPYING can be found at the root * * of the source code distribution tree; Copyright.html can be found at the * * root level of an installed copy of the electronic HDF5 document set and * * is linked from the top-level documents page. It can also be found at * * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have * * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ #define H5A_PACKAGE /*suppress error about including H5Apkg */ /* Interface initialization */ #define H5_INTERFACE_INIT_FUNC H5A_init_interface /* Private header files */ #include "H5private.h" /* Generic Functions */ #include "H5Apkg.h" /* Attributes */ #include "H5Eprivate.h" /* Error handling */ #include "H5FLprivate.h" /* Free Lists */ #include "H5Iprivate.h" /* IDs */ #include "H5MMprivate.h" /* Memory management */ #include "H5Sprivate.h" /* Dataspace functions */ /* PRIVATE PROTOTYPES */ static hid_t H5A_create(const H5G_entry_t *ent, const char *name, const H5T_t *type, const H5S_t *space, hid_t dxpl_id); static hid_t H5A_open(H5G_entry_t *ent, unsigned idx, hid_t dxpl_id); static herr_t H5A_write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id); static herr_t H5A_read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id); static int H5A_get_index(H5G_entry_t *ent, const char *name, hid_t dxpl_id); static hsize_t H5A_get_storage_size(const H5A_t *attr); static herr_t H5A_rename(H5G_entry_t *ent, const char *old_name, const char *new_name, hid_t dxpl_id); /* Object header iterator callbacks */ /* Data structure for callback for locating the index by name */ typedef struct H5A_iter_cb1 { const char *name; int idx; } H5A_iter_cb1; static herr_t H5A_find_idx_by_name(const void *mesg, unsigned idx, void *op_data); /* The number of reserved IDs in dataset ID group */ #define H5A_RESERVED_ATOMS 0 /* Declare the free lists for H5A_t's */ H5FL_DEFINE(H5A_t); /* Declare a free list to manage blocks of type conversion data */ H5FL_BLK_DEFINE(attr_buf); /*-------------------------------------------------------------------------- NAME H5A_init_interface -- Initialize interface-specific information USAGE herr_t H5A_init_interface() RETURNS Non-negative on success/Negative on failure DESCRIPTION Initializes any interface-specific data or routines. --------------------------------------------------------------------------*/ static herr_t H5A_init_interface(void) { herr_t ret_value=SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5A_init_interface) /* * Create attribute group. */ if (H5I_init_group(H5I_ATTR, H5I_ATTRID_HASHSIZE, H5A_RESERVED_ATOMS, (H5I_free_t)H5A_close)<0) HGOTO_ERROR(H5E_INTERNAL, H5E_CANTINIT, FAIL, "unable to initialize interface") done: FUNC_LEAVE_NOAPI(ret_value) } /*-------------------------------------------------------------------------- NAME H5A_term_interface PURPOSE Terminate various H5A objects USAGE void H5A_term_interface() RETURNS DESCRIPTION Release any other resources allocated. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS Can't report errors... EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ int H5A_term_interface(void) { int n=0; FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_term_interface) if (H5_interface_initialize_g) { if ((n=H5I_nmembers(H5I_ATTR))>0) { (void)H5I_clear_group(H5I_ATTR, FALSE); } else { (void)H5I_destroy_group(H5I_ATTR); H5_interface_initialize_g = 0; n = 1; } } FUNC_LEAVE_NOAPI(n) } /*-------------------------------------------------------------------------- NAME H5Acreate PURPOSE Creates a dataset as an attribute of another dataset or group USAGE hid_t H5Acreate (loc_id, name, type_id, space_id, plist_id) hid_t loc_id; IN: Object (dataset or group) to be attached to const char *name; IN: Name of attribute to create hid_t type_id; IN: ID of datatype for attribute hid_t space_id; IN: ID of dataspace for attribute hid_t plist_id; IN: ID of creation property list (currently not used) RETURNS Non-negative on success/Negative on failure ERRORS DESCRIPTION This function creates an attribute which is attached to the object specified with 'location_id'. The name specified with 'name' for each attribute for an object must be unique for that object. The 'type_id' and 'space_id' are created with the H5T and H5S interfaces respectively. Currently only simple dataspaces are allowed for attribute dataspaces. The 'plist_id' property list is currently un-used, but will be used int the future for optional properties of attributes. The attribute ID returned from this function must be released with H5Aclose or resource leaks will develop. The link created (see H5G API documentation for more information on link types) is a hard link, so the attribute may be shared among datasets and will not be removed from the file until the reference count for the attribute is reduced to zero. The location object may be either a group or a dataset, both of which may have any sort of attribute. * * Modifications: * Robb Matzke, 5 Jun 1998 * The LOC_ID can also be a committed datatype. * --------------------------------------------------------------------------*/ /* ARGSUSED */ hid_t H5Acreate(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id, hid_t UNUSED plist_id) { H5G_entry_t *ent = NULL; H5T_t *type = NULL; H5S_t *space = NULL; hid_t ret_value = FAIL; FUNC_ENTER_API(H5Acreate, FAIL) H5TRACE5("i","isiii",loc_id,name,type_id,space_id,plist_id); /* check arguments */ if (H5I_FILE==H5I_get_type(loc_id) || H5I_ATTR==H5I_get_type(loc_id)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute") if (NULL==(ent=H5G_loc(loc_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location") if (!name || !*name) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name") if (NULL == (type = H5I_object_verify(type_id, H5I_DATATYPE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a type") if (NULL == (space = H5I_object_verify(space_id, H5I_DATASPACE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space") /* Go do the real work for attaching the attribute to the dataset */ if ((ret_value=H5A_create(ent,name,type,space, H5AC_dxpl_id))<0) HGOTO_ERROR (H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create attribute") done: FUNC_LEAVE_API(ret_value) } /* H5Acreate() */ /*------------------------------------------------------------------------- * Function: H5A_create * * Purpose: * This is the guts of the H5Acreate function. * Usage: * hid_t H5A_create (ent, name, type, space) * const H5G_entry_t *ent; IN: Pointer to symbol table entry for object to attribute * const char *name; IN: Name of attribute * H5T_t *type; IN: Datatype of attribute * H5S_t *space; IN: Dataspace of attribute * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * April 2, 1998 * * Modifications: * * Pedro Vicente, 22 Aug 2002 * Added a deep copy of the symbol table entry * *------------------------------------------------------------------------- */ static hid_t H5A_create(const H5G_entry_t *ent, const char *name, const H5T_t *type, const H5S_t *space, hid_t dxpl_id) { H5A_t *attr = NULL; H5A_iter_cb1 cb; /* Iterator callback */ hid_t ret_value = FAIL; FUNC_ENTER_NOAPI_NOINIT(H5A_create) /* check args */ assert(ent); assert(name); assert(type); assert(space); /* Iterate over the existing attributes to check for duplicates */ cb.name=name; cb.idx=(-1); if((ret_value=H5O_iterate(ent,H5O_ATTR_ID,H5A_find_idx_by_name,&cb,dxpl_id))<0) HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "error iterating over attributes") if(ret_value>0) HGOTO_ERROR(H5E_ATTR, H5E_ALREADYEXISTS, FAIL, "attribute already exists") /* Check if the dataspace has an extent set (or is NULL) */ if( !(H5S_has_extent(space)) ) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "dataspace extent has not been set") /* Build the attribute information */ if((attr = H5FL_CALLOC(H5A_t))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for attribute info") /* Copy the attribute name */ attr->name=HDstrdup(name); /* Copy the attribute's datatype */ attr->dt=H5T_copy(type, H5T_COPY_ALL); /* Mark any VL datatypes as being on disk now */ if (H5T_vlen_mark(attr->dt, ent->file, H5T_VLEN_DISK)<0) HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "invalid VL location"); /* Copy the dataspace for the attribute */ attr->ds=H5S_copy(space, FALSE); /* Mark it initially set to initialized */ attr->initialized = TRUE; /*for now, set to false later*/ /* Deep copy of the symbol table entry */ if (H5G_ent_copy(&(attr->ent),ent,H5G_COPY_DEEP)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to copy entry") /* Compute the size of pieces on disk */ if(H5T_committed(attr->dt)) { H5O_shared_t sh_mesg; /* Reset shared message information */ HDmemset(&sh_mesg,0,sizeof(H5O_shared_t)); /* Get shared message information for datatype */ if (H5O_get_share(H5O_DTYPE_ID,attr->ent.file, type, &sh_mesg/*out*/)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to copy entry") /* Compute shared message size for datatype */ attr->dt_size=H5O_raw_size(H5O_SHARED_ID,attr->ent.file,&sh_mesg); } /* end if */ else attr->dt_size=H5O_raw_size(H5O_DTYPE_ID,attr->ent.file,type); assert(attr->dt_size>0); attr->ds_size=H5S_raw_size(attr->ent.file,space); assert(attr->ds_size>0); H5_ASSIGN_OVERFLOW(attr->data_size,H5S_GET_EXTENT_NPOINTS(attr->ds)*H5T_get_size(attr->dt),hssize_t,size_t); /* Hold the symbol table entry (and file) open */ if (H5O_open(&(attr->ent)) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open") attr->ent_opened=1; /* Create the attribute message and save the attribute index */ if (H5O_modify(&(attr->ent), H5O_ATTR_ID, H5O_NEW_MESG, 0, H5O_UPDATE_TIME, attr, dxpl_id) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to update attribute header messages") /* Register the new attribute and get an ID for it */ if ((ret_value = H5I_register(H5I_ATTR, attr)) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID") /* Now it's safe to say it's uninitialized */ attr->initialized = FALSE; done: if (ret_value < 0) { if(attr) (void)H5A_close(attr); } /* end if */ FUNC_LEAVE_NOAPI(ret_value) } /* H5A_create() */ /*-------------------------------------------------------------------------- NAME H5A_find_idx_by_name PURPOSE Iterator callback to determine the index of a attribute USAGE herr_t H5A_find_idx_by_name (mesg, idx, op_data) const H5A_t *mesg; IN: Pointer to attribute unsigned idx; IN: Index of attribute void *op_data; IN: Op data passed in RETURNS Non-negative on success, negative on failure ERRORS DESCRIPTION This function determines if an attribute matches the name to search for (from the 'op_data') and sets the index value in the 'op_data'. --------------------------------------------------------------------------*/ static herr_t H5A_find_idx_by_name(const void *_mesg, unsigned idx, void *_op_data) { const H5A_t *mesg = (const H5A_t *)_mesg; /* Pointer to attribute */ H5A_iter_cb1 *op_data = (H5A_iter_cb1 *)_op_data; /* Pointer to op data */ int ret_value; /* Return value */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_find_idx_by_name) assert(mesg); assert(op_data); /* * Compare found attribute name to queried name and set the idx in the * callback info if names are the same. */ if(HDstrcmp(mesg->name,op_data->name)==0) { op_data->idx=idx; ret_value=1; } /* end if */ else ret_value=0; FUNC_LEAVE_NOAPI(ret_value) } /* H5A_find_idx_by_name() */ /*-------------------------------------------------------------------------- NAME H5A_get_index PURPOSE Determine the index of an attribute in an object header USAGE int H5A_get_index (ent, name) H5G_entry_t *ent; IN: Symbol table entry of object const char *name; IN: Name of dataset to find RETURNS non-negative on success, negative on failure ERRORS DESCRIPTION This function determines the index of the attribute within an object header. This is not stored in the attribute structure because it is only a subjective measure and can change if attributes are deleted from the object header. --------------------------------------------------------------------------*/ static int H5A_get_index(H5G_entry_t *ent, const char *name, hid_t dxpl_id) { H5A_iter_cb1 cb; /* Iterator callback */ int ret_value=FAIL; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5A_get_index) assert(ent); assert(name); cb.name=name; cb.idx=(-1); if((ret_value=H5O_iterate(ent,H5O_ATTR_ID,H5A_find_idx_by_name,&cb,dxpl_id))<0) HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "error iterating over attributes") if(ret_value>0) ret_value=cb.idx; else HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "attribute not found") done: FUNC_LEAVE_NOAPI(ret_value) } /* H5A_get_index() */ /*-------------------------------------------------------------------------- NAME H5Aopen_name PURPOSE Opens an attribute for an object by looking up the attribute name USAGE hid_t H5Aopen_name (loc_id, name) hid_t loc_id; IN: Object (dataset or group) to be attached to const char *name; IN: Name of attribute to locate and open RETURNS ID of attribute on success, negative on failure ERRORS DESCRIPTION This function opens an existing attribute for access. The attribute name specified is used to look up the corresponding attribute for the object. The attribute ID returned from this function must be released with H5Aclose or resource leaks will develop. The location object may be either a group or a dataset, both of which may have any sort of attribute. * * Modifications: * Robb Matzke, 5 Jun 1998 * The LOC_ID can also be a named (committed) datatype. --------------------------------------------------------------------------*/ hid_t H5Aopen_name(hid_t loc_id, const char *name) { H5G_entry_t *ent = NULL; /*Symtab entry of object to attribute*/ int idx=0; hid_t ret_value; FUNC_ENTER_API(H5Aopen_name, FAIL) H5TRACE2("i","is",loc_id,name); /* check arguments */ if (H5I_FILE==H5I_get_type(loc_id) || H5I_ATTR==H5I_get_type(loc_id)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute") if (NULL==(ent=H5G_loc(loc_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location") if (!name || !*name) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name") /* Look up the attribute for the object */ if((idx=H5A_get_index(ent,name, H5AC_dxpl_id))<0) HGOTO_ERROR(H5E_ATTR, H5E_BADVALUE, FAIL, "attribute not found") /* Go do the real work for opening the attribute */ if ((ret_value=H5A_open(ent, (unsigned)idx, H5AC_dxpl_id))<0) HGOTO_ERROR (H5E_ATTR, H5E_CANTINIT, FAIL, "unable to open attribute") done: FUNC_LEAVE_API(ret_value) } /* H5Aopen_name() */ /*-------------------------------------------------------------------------- NAME H5Aopen_idx PURPOSE Opens the n'th attribute for an object USAGE hid_t H5Aopen_idx (loc_id, idx) hid_t loc_id; IN: Object (dataset or group) to be attached to unsigned idx; IN: Index (0-based) attribute to open RETURNS ID of attribute on success, negative on failure ERRORS DESCRIPTION This function opens an existing attribute for access. The attribute index specified is used to look up the corresponding attribute for the object. The attribute ID returned from this function must be released with H5Aclose or resource leaks will develop. The location object may be either a group or a dataset, both of which may have any sort of attribute. * * Modifications: * Robb Matzke, 5 Jun 1998 * The LOC_ID can also be a named (committed) datatype. * --------------------------------------------------------------------------*/ hid_t H5Aopen_idx(hid_t loc_id, unsigned idx) { H5G_entry_t *ent = NULL; /*Symtab entry of object to attribute */ hid_t ret_value; FUNC_ENTER_API(H5Aopen_idx, FAIL) H5TRACE2("i","iIu",loc_id,idx); /* check arguments */ if (H5I_FILE==H5I_get_type(loc_id) || H5I_ATTR==H5I_get_type(loc_id)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute") if (NULL==(ent=H5G_loc(loc_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location") /* Go do the real work for opening the attribute */ if ((ret_value=H5A_open(ent, idx, H5AC_dxpl_id))<0) HGOTO_ERROR (H5E_ATTR, H5E_CANTINIT, FAIL, "unable to open attribute") done: FUNC_LEAVE_API(ret_value) } /* H5Aopen_idx() */ /*------------------------------------------------------------------------- * Function: H5A_open * * Purpose: * This is the guts of the H5Aopen_xxx functions * Usage: * herr_t H5A_open (ent, idx) * const H5G_entry_t *ent; IN: Pointer to symbol table entry for object to attribute * unsigned idx; IN: index of attribute to open (0-based) * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * April 2, 1998 * * Modifications: * * Pedro Vicente, 22 Aug 2002 * Added a deep copy of the symbol table entry * *------------------------------------------------------------------------- */ static hid_t H5A_open(H5G_entry_t *ent, unsigned idx, hid_t dxpl_id) { H5A_t *attr = NULL; hid_t ret_value; FUNC_ENTER_NOAPI_NOINIT(H5A_open) /* check args */ assert(ent); /* Read in attribute with H5O_read() */ H5_CHECK_OVERFLOW(idx,unsigned,int); if (NULL==(attr=H5O_read(ent, H5O_ATTR_ID, (int)idx, NULL, dxpl_id))) HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to load attribute info from dataset header") attr->initialized=1; /* Deep copy of the symbol table entry */ if (H5G_ent_copy(&(attr->ent),ent,H5G_COPY_DEEP)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to copy entry") /* Hold the symbol table entry (and file) open */ if (H5O_open(&(attr->ent)) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open") attr->ent_opened=1; /* Register the new attribute and get an ID for it */ if ((ret_value = H5I_register(H5I_ATTR, attr)) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID") done: if (ret_value < 0) { if(attr) (void)H5A_close(attr); } FUNC_LEAVE_NOAPI(ret_value) } /* H5A_open() */ /*-------------------------------------------------------------------------- NAME H5Awrite PURPOSE Write out data to an attribute USAGE herr_t H5Awrite (attr_id, type_id, buf) hid_t attr_id; IN: Attribute to write hid_t type_id; IN: Memory datatype of buffer const void *buf; IN: Buffer of data to write RETURNS Non-negative on success/Negative on failure ERRORS DESCRIPTION This function writes a complete attribute to disk. --------------------------------------------------------------------------*/ herr_t H5Awrite(hid_t attr_id, hid_t type_id, const void *buf) { H5A_t *attr = NULL; const H5T_t *mem_type = NULL; herr_t ret_value; FUNC_ENTER_API(H5Awrite, FAIL) H5TRACE3("e","iix",attr_id,type_id,buf); /* check arguments */ if (NULL == (attr = H5I_object_verify(attr_id, H5I_ATTR))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute") if (NULL == (mem_type = H5I_object_verify(type_id, H5I_DATATYPE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype") if (NULL == buf) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null attribute buffer") /* Go write the actual data to the attribute */ if ((ret_value=H5A_write(attr,mem_type,buf, H5AC_dxpl_id))<0) HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "unable to write attribute") done: FUNC_LEAVE_API(ret_value) } /* H5Awrite() */ /*-------------------------------------------------------------------------- NAME H5A_write PURPOSE Actually write out data to an attribute USAGE herr_t H5A_write (attr, mem_type, buf) H5A_t *attr; IN: Attribute to write const H5T_t *mem_type; IN: Memory datatype of buffer const void *buf; IN: Buffer of data to write RETURNS Non-negative on success/Negative on failure ERRORS DESCRIPTION This function writes a complete attribute to disk. --------------------------------------------------------------------------*/ static herr_t H5A_write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id) { uint8_t *tconv_buf = NULL; /* datatype conv buffer */ uint8_t *bkg_buf = NULL; /* temp conversion buffer */ hssize_t snelmts; /* elements in attribute */ size_t nelmts; /* elements in attribute */ H5T_path_t *tpath = NULL; /* conversion information*/ hid_t src_id = -1, dst_id = -1;/* temporary type atoms */ size_t src_type_size; /* size of source type */ size_t dst_type_size; /* size of destination type*/ size_t buf_size; /* desired buffer size */ int idx; /* index of attribute in object header */ herr_t ret_value = SUCCEED; FUNC_ENTER_NOAPI_NOINIT(H5A_write) assert(attr); assert(mem_type); assert(buf); /* Create buffer for data to store on disk */ if((snelmts=H5S_GET_EXTENT_NPOINTS(attr->ds))<0) HGOTO_ERROR (H5E_ATTR, H5E_CANTCOUNT, FAIL, "dataspace is invalid") H5_ASSIGN_OVERFLOW(nelmts,snelmts,hssize_t,size_t); if(nelmts>0) { /* Get the memory and file datatype sizes */ src_type_size = H5T_get_size(mem_type); dst_type_size = H5T_get_size(attr->dt); /* Convert memory buffer into disk buffer */ /* Set up type conversion function */ if (NULL == (tpath = H5T_path_find(mem_type, attr->dt, NULL, NULL, dxpl_id))) HGOTO_ERROR(H5E_ATTR, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dst datatypes") /* Check for type conversion required */ if (!H5T_path_noop(tpath)) { if ((src_id = H5I_register(H5I_DATATYPE, H5T_copy(mem_type, H5T_COPY_ALL)))<0 || (dst_id = H5I_register(H5I_DATATYPE, H5T_copy(attr->dt, H5T_COPY_ALL)))<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTREGISTER, FAIL, "unable to register types for conversion") /* Get the maximum buffer size needed and allocate it */ buf_size=nelmts*MAX(src_type_size,dst_type_size); if (NULL==(tconv_buf = H5FL_BLK_MALLOC (attr_buf, buf_size)) || NULL==(bkg_buf = H5FL_BLK_CALLOC(attr_buf, buf_size))) HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed") /* Copy the user's data into the buffer for conversion */ HDmemcpy(tconv_buf,buf,(src_type_size*nelmts)); /* Perform datatype conversion */ if (H5T_convert(tpath, src_id, dst_id, nelmts, 0, 0, tconv_buf, bkg_buf, dxpl_id)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "datatype conversion failed") /* Free the previous attribute data buffer, if there is one */ if(attr->data) H5FL_BLK_FREE(attr_buf, attr->data); /* Set the pointer to the attribute data to the converted information */ attr->data=tconv_buf; } /* end if */ /* No type conversion necessary */ else { HDassert(dst_type_size==src_type_size); /* Allocate the attribute buffer, if there isn't one */ if(attr->data==NULL) if (NULL==(attr->data = H5FL_BLK_MALLOC(attr_buf, dst_type_size*nelmts))) HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed") /* Copy the attribute data into the user's buffer */ HDmemcpy(attr->data,buf,(dst_type_size*nelmts)); } /* end else */ /* Look up the attribute for the object */ if((idx=H5A_get_index(&(attr->ent),attr->name,dxpl_id))<0) HGOTO_ERROR(H5E_ATTR, H5E_BADVALUE, FAIL, "attribute not found") /* Modify the attribute data */ if (H5O_modify(&(attr->ent), H5O_ATTR_ID, idx, 0, H5O_UPDATE_DATA_ONLY|H5O_UPDATE_TIME, attr, dxpl_id) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to update attribute header messages") } /* end if */ /* Indicate the the attribute doesn't need fill-values */ attr->initialized=TRUE; done: /* Release resources */ if (src_id >= 0) (void)H5I_dec_ref(src_id); if (dst_id >= 0) (void)H5I_dec_ref(dst_id); if (bkg_buf) H5FL_BLK_FREE(attr_buf, bkg_buf); FUNC_LEAVE_NOAPI(ret_value) } /* H5A_write() */ /*-------------------------------------------------------------------------- NAME H5Aread PURPOSE Read in data from an attribute USAGE herr_t H5Aread (attr_id, type_id, buf) hid_t attr_id; IN: Attribute to read hid_t type_id; IN: Memory datatype of buffer void *buf; IN: Buffer for data to read RETURNS Non-negative on success/Negative on failure ERRORS DESCRIPTION This function reads a complete attribute from disk. --------------------------------------------------------------------------*/ herr_t H5Aread(hid_t attr_id, hid_t type_id, void *buf) { H5A_t *attr = NULL; const H5T_t *mem_type = NULL; herr_t ret_value; FUNC_ENTER_API(H5Aread, FAIL) H5TRACE3("e","iix",attr_id,type_id,buf); /* check arguments */ if (NULL == (attr = H5I_object_verify(attr_id, H5I_ATTR))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute") if (NULL == (mem_type = H5I_object_verify(type_id, H5I_DATATYPE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype") if (NULL == buf) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null attribute buffer") /* Go write the actual data to the attribute */ if ((ret_value=H5A_read(attr,mem_type,buf,H5AC_dxpl_id))<0) HGOTO_ERROR(H5E_ATTR, H5E_READERROR, FAIL, "unable to read attribute") done: FUNC_LEAVE_API(ret_value) } /* H5Aread() */ /*-------------------------------------------------------------------------- NAME H5A_read PURPOSE Actually read in data from an attribute USAGE herr_t H5A_read (attr, mem_type, buf) H5A_t *attr; IN: Attribute to read const H5T_t *mem_type; IN: Memory datatype of buffer void *buf; IN: Buffer for data to read RETURNS Non-negative on success/Negative on failure ERRORS DESCRIPTION This function reads a complete attribute from disk. --------------------------------------------------------------------------*/ static herr_t H5A_read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id) { uint8_t *tconv_buf = NULL; /* datatype conv buffer*/ uint8_t *bkg_buf = NULL; /* background buffer */ hssize_t snelmts; /* elements in attribute */ size_t nelmts; /* elements in attribute*/ H5T_path_t *tpath = NULL; /* type conversion info */ hid_t src_id = -1, dst_id = -1;/* temporary type atoms*/ size_t src_type_size; /* size of source type */ size_t dst_type_size; /* size of destination type */ size_t buf_size; /* desired buffer size */ herr_t ret_value = SUCCEED; FUNC_ENTER_NOAPI_NOINIT(H5A_read) assert(attr); assert(mem_type); assert(buf); /* Create buffer for data to store on disk */ if((snelmts=H5S_GET_EXTENT_NPOINTS(attr->ds))<0) HGOTO_ERROR (H5E_ATTR, H5E_CANTCOUNT, FAIL, "dataspace is invalid") H5_ASSIGN_OVERFLOW(nelmts,snelmts,hssize_t,size_t); if(nelmts>0) { /* Get the memory and file datatype sizes */ src_type_size = H5T_get_size(attr->dt); dst_type_size = H5T_get_size(mem_type); /* Check if the attribute has any data yet, if not, fill with zeroes */ if(attr->ent_opened && !attr->initialized) { HDmemset(buf,0,(dst_type_size*nelmts)); } /* end if */ else { /* Attribute exists and has a value */ /* Convert memory buffer into disk buffer */ /* Set up type conversion function */ if (NULL == (tpath = H5T_path_find(attr->dt, mem_type, NULL, NULL, dxpl_id))) HGOTO_ERROR(H5E_ATTR, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dst datatypes") /* Check for type conversion required */ if (!H5T_path_noop(tpath)) { if ((src_id = H5I_register(H5I_DATATYPE, H5T_copy(attr->dt, H5T_COPY_ALL)))<0 || (dst_id = H5I_register(H5I_DATATYPE, H5T_copy(mem_type, H5T_COPY_ALL)))<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTREGISTER, FAIL, "unable to register types for conversion") /* Get the maximum buffer size needed and allocate it */ buf_size=nelmts*MAX(src_type_size,dst_type_size); if (NULL==(tconv_buf = H5FL_BLK_MALLOC(attr_buf, buf_size)) || NULL==(bkg_buf = H5FL_BLK_CALLOC(attr_buf, buf_size))) HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed") /* Copy the attribute data into the buffer for conversion */ HDmemcpy(tconv_buf,attr->data,(src_type_size*nelmts)); /* Perform datatype conversion. */ if (H5T_convert(tpath, src_id, dst_id, nelmts, 0, 0, tconv_buf, bkg_buf, dxpl_id)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "datatype conversion failed") /* Copy the converted data into the user's buffer */ HDmemcpy(buf,tconv_buf,(dst_type_size*nelmts)); } /* end if */ /* No type conversion necessary */ else { HDassert(dst_type_size==src_type_size); /* Copy the attribute data into the user's buffer */ HDmemcpy(buf,attr->data,(dst_type_size*nelmts)); } /* end else */ } /* end else */ } /* end if */ done: /* Release resources */ if (src_id >= 0) (void)H5I_dec_ref(src_id); if (dst_id >= 0) (void)H5I_dec_ref(dst_id); if (tconv_buf) H5FL_BLK_FREE(attr_buf, tconv_buf); if (bkg_buf) H5FL_BLK_FREE(attr_buf, bkg_buf); FUNC_LEAVE_NOAPI(ret_value) } /* H5A_read() */ /*-------------------------------------------------------------------------- NAME H5Aget_space PURPOSE Gets a copy of the dataspace for an attribute USAGE hid_t H5Aget_space (attr_id) hid_t attr_id; IN: Attribute to get dataspace of RETURNS A dataspace ID on success, negative on failure ERRORS DESCRIPTION This function retrieves a copy of the dataspace for an attribute. The dataspace ID returned from this function must be released with H5Sclose or resource leaks will develop. --------------------------------------------------------------------------*/ hid_t H5Aget_space(hid_t attr_id) { H5A_t *attr = NULL; H5S_t *dst = NULL; hid_t ret_value; FUNC_ENTER_API(H5Aget_space, FAIL) H5TRACE1("i","i",attr_id); /* check arguments */ if (NULL == (attr = H5I_object_verify(attr_id, H5I_ATTR))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute") /* Copy the attribute's dataspace */ if (NULL==(dst=H5S_copy (attr->ds, FALSE))) HGOTO_ERROR (H5E_ATTR, H5E_CANTINIT, FAIL, "unable to copy dataspace") /* Atomize */ if ((ret_value=H5I_register (H5I_DATASPACE, dst))<0) HGOTO_ERROR (H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace atom") done: FUNC_LEAVE_API(ret_value) } /* H5Aget_space() */ /*-------------------------------------------------------------------------- NAME H5Aget_type PURPOSE Gets a copy of the datatype for an attribute USAGE hid_t H5Aget_type (attr_id) hid_t attr_id; IN: Attribute to get datatype of RETURNS A datatype ID on success, negative on failure ERRORS DESCRIPTION This function retrieves a copy of the datatype for an attribute. The datatype ID returned from this function must be released with H5Tclose or resource leaks will develop. * * Modifications: * Robb Matzke, 4 Jun 1998 * The datatype is reopened if it's a named type before returning it to * the application. The datatypes returned by this function are always * read-only. If an error occurs when atomizing the return datatype * then the datatype is closed. --------------------------------------------------------------------------*/ hid_t H5Aget_type(hid_t attr_id) { H5A_t *attr = NULL; H5T_t *dst = NULL; hid_t ret_value; FUNC_ENTER_API(H5Aget_type, FAIL) H5TRACE1("i","i",attr_id); /* check arguments */ if (NULL == (attr = H5I_object_verify(attr_id, H5I_ATTR))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute") /* * Copy the attribute's datatype. If the type is a named type then * reopen the type before returning it to the user. Make the type * read-only. */ if (NULL==(dst=H5T_copy(attr->dt, H5T_COPY_REOPEN))) HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to copy datatype") /* Mark any VL datatypes as being in memory now */ if (H5T_vlen_mark(dst, NULL, H5T_VLEN_MEMORY)<0) HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "invalid VL location") if (H5T_lock(dst, FALSE)<0) HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to lock transient datatype") /* Atomize */ if ((ret_value=H5I_register(H5I_DATATYPE, dst))<0) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register datatype atom") done: if(ret_value<0) { if(dst!=NULL) (void)H5T_close(dst); } /* end if */ FUNC_LEAVE_API(ret_value) } /* H5Aget_type() */ /*-------------------------------------------------------------------------- NAME H5Aget_name PURPOSE Gets a copy of the name for an attribute USAGE hssize_t H5Aget_name (attr_id, buf_size, buf) hid_t attr_id; IN: Attribute to get name of size_t buf_size; IN: The size of the buffer to store the string in. char *buf; IN: Buffer to store name in RETURNS This function returns the length of the attribute's name (which may be longer than 'buf_size') on success or negative for failure. ERRORS DESCRIPTION This function retrieves the name of an attribute for an attribute ID. Up to 'buf_size' characters are stored in 'buf' followed by a '\0' string terminator. If the name of the attribute is longer than 'buf_size'-1, the string terminator is stored in the last position of the buffer to properly terminate the string. --------------------------------------------------------------------------*/ ssize_t H5Aget_name(hid_t attr_id, size_t buf_size, char *buf) { H5A_t *attr = NULL; size_t copy_len, nbytes; ssize_t ret_value; FUNC_ENTER_API(H5Aget_name, FAIL) H5TRACE3("Zs","izs",attr_id,buf_size,buf); /* check arguments */ if (NULL == (attr = H5I_object_verify(attr_id, H5I_ATTR))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute") if (!buf && buf_size) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid buffer") /* get the real attribute length */ nbytes = HDstrlen(attr->name); assert((ssize_t)nbytes>=0); /*overflow, pretty unlikey --rpm*/ /* compute the string length which will fit into the user's buffer */ copy_len = MIN(buf_size-1, nbytes); /* Copy all/some of the name */ if(buf && copy_len>0) { HDmemcpy(buf, attr->name, copy_len); /* Terminate the string */ buf[copy_len]='\0'; } /* Set return value */ ret_value = (ssize_t)nbytes; done: FUNC_LEAVE_API(ret_value) } /* H5Aget_type() */ /*------------------------------------------------------------------------- * Function: H5Aget_storage_size * * Purpose: Returns the amount of storage size that is required for this * attribute. * * Return: Success: The amount of storage size allocated for the * attribute. The return value may be zero * if no data has been stored. * * Failure: Zero * * Programmer: Raymond Lu * October 23, 2002 * * Modifications: * *------------------------------------------------------------------------- */ hsize_t H5Aget_storage_size(hid_t attr_id) { H5A_t *attr=NULL; hsize_t ret_value; /* Return value */ FUNC_ENTER_API(H5Aget_storage_size, 0) H5TRACE1("h","i",attr_id); /* Check args */ if (NULL==(attr=H5I_object_verify(attr_id, H5I_ATTR))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not an attribute") /* Set return value */ ret_value = H5A_get_storage_size(attr); done: FUNC_LEAVE_API(ret_value) } /*------------------------------------------------------------------------- * Function: H5A_get_storage_size * * Purpose: Private function for H5Aget_storage_size. Returns the * amount of storage size that is required for this * attribute. * * Return: Success: The amount of storage size allocated for the * attribute. The return value may be zero * if no data has been stored. * * Failure: Zero * * Programmer: Raymond Lu * October 23, 2002 * * Modifications: * *------------------------------------------------------------------------- */ static hsize_t H5A_get_storage_size(const H5A_t *attr) { hsize_t ret_value; /* Return value */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5A_get_storage_size) /* Set return value */ ret_value = attr->data_size; FUNC_LEAVE_NOAPI(ret_value) } /*-------------------------------------------------------------------------- NAME H5Aget_num_attrs PURPOSE Determines the number of attributes attached to an object USAGE int H5Aget_num_attrs (loc_id) hid_t loc_id; IN: Object (dataset or group) to be queried RETURNS Number of attributes on success, negative on failure ERRORS DESCRIPTION This function returns the number of attributes attached to a dataset or group, 'location_id'. * * Modifications: * Robb Matzke, 5 Jun 1998 * The LOC_ID can also be a named (committed) datatype. --------------------------------------------------------------------------*/ int H5Aget_num_attrs(hid_t loc_id) { H5G_entry_t *ent = NULL; /*symtab ent of object to attribute */ void *obj = NULL; int ret_value; FUNC_ENTER_API(H5Aget_num_attrs, FAIL) H5TRACE1("Is","i",loc_id); /* check arguments */ if (H5I_FILE==H5I_get_type(loc_id) || H5I_ATTR==H5I_get_type(loc_id)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute") if(NULL == (obj = H5I_object(loc_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADATOM, FAIL, "illegal object atom") switch (H5I_get_type (loc_id)) { case H5I_DATASET: ent = H5D_entof ((H5D_t*)obj); break; case H5I_DATATYPE: if (NULL==(ent=H5T_entof ((H5T_t*)obj))) HGOTO_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "target datatype is not committed") break; case H5I_GROUP: ent = H5G_entof ((H5G_t*)obj); break; default: HGOTO_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "inappropriate attribute target") } /*lint !e788 All appropriate cases are covered */ /* Look up the attribute for the object */ ret_value=H5O_count(ent, H5O_ATTR_ID, H5AC_ind_dxpl_id); done: FUNC_LEAVE_API(ret_value) } /* H5Aget_num_attrs() */ /*------------------------------------------------------------------------- * Function: H5Arename * * Purpose: Rename an attribute * * Return: Success: Non-negative * * Failure: Negative * * Programmer: Raymond Lu * October 23, 2002 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5Arename(hid_t loc_id, const char *old_name, const char *new_name) { H5G_entry_t *ent = NULL; /*symtab ent of object to attribute */ herr_t ret_value; /* Return value */ FUNC_ENTER_API(H5Arename, FAIL) H5TRACE3("e","iss",loc_id,old_name,new_name); /* check arguments */ if (!old_name || !new_name) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "name is nil") if (H5I_FILE==H5I_get_type(loc_id) || H5I_ATTR==H5I_get_type(loc_id)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute") if (NULL==(ent=H5G_loc(loc_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location") /* Call private function */ ret_value = H5A_rename(ent, old_name, new_name, H5AC_dxpl_id); done: FUNC_LEAVE_API(ret_value) } /* H5Arename() */ /*------------------------------------------------------------------------- * Function: H5A_rename * * Purpose: Private function for H5Arename. Rename an attribute * * Return: Success: Non-negative * * Failure: Negative * * Programmer: Raymond Lu * October 23, 2002 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5A_rename(H5G_entry_t *ent, const char *old_name, const char *new_name, hid_t dxpl_id) { int seq, idx=FAIL; /* Index of attribute being querried */ H5A_t found_attr; /* Attribute with OLD_NAME */ herr_t ret_value=SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5A_rename) /* Check arguments */ assert(ent); assert(old_name); assert(new_name); /* Read in the existing attributes to check for duplicates */ seq=0; while(H5O_read(ent, H5O_ATTR_ID, seq, &found_attr, dxpl_id)!=NULL) { /* * Compare found attribute name. */ if(HDstrcmp(found_attr.name,old_name)==0) { idx = seq; break; } if(H5O_reset (H5O_ATTR_ID, &found_attr)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't release attribute info") seq++; } H5E_clear (); if(idx<0) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "attribute cannot be found") /* Copy the attribute name. */ if(found_attr.name) HDfree(found_attr.name); found_attr.name = HDstrdup(new_name); if(!found_attr.name) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "String copy failed") /* Indicate entry is not opened and the attribute doesn't need fill-values. */ found_attr.ent_opened=FALSE; found_attr.initialized=TRUE; /* Modify the attribute message */ if (H5O_modify(ent, H5O_ATTR_ID, idx, 0, H5O_UPDATE_TIME, &found_attr, dxpl_id) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to update attribute header messages") /* Close the attribute */ if(H5A_free(&found_attr)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "unable to close renamed attribute") done: FUNC_LEAVE_NOAPI(ret_value) } /*-------------------------------------------------------------------------- NAME H5Aiterate PURPOSE Calls a user's function for each attribute on an object USAGE herr_t H5Aiterate (loc_id, attr_num, op, data) hid_t loc_id; IN: Object (dataset or group) to be iterated over unsigned *attr_num; IN/OUT: Starting (IN) & Ending (OUT) attribute number H5A_operator_t op; IN: User's function to pass each attribute to void *op_data; IN/OUT: User's data to pass through to iterator operator function RETURNS Returns a negative value if something is wrong, the return value of the last operator if it was non-zero, or zero if all attributes were processed. ERRORS DESCRIPTION This function interates over the attributes of dataset or group specified with 'loc_id'. For each attribute of the object, the 'op_data' and some additional information (specified below) are passed to the 'op' function. The iteration begins with the '*attr_number' object in the group and the next attribute to be processed by the operator is returned in '*attr_number'. The operation receives the ID for the group or dataset being iterated over ('loc_id'), the name of the current attribute about the object ('attr_name') and the pointer to the operator data passed in to H5Aiterate ('op_data'). The return values from an operator are: A. Zero causes the iterator to continue, returning zero when all attributes have been processed. B. Positive causes the iterator to immediately return that positive value, indicating short-circuit success. The iterator can be restarted at the next attribute. C. Negative causes the iterator to immediately return that value, indicating failure. The iterator can be restarted at the next attribute. * * Modifications: * Robb Matzke, 5 Jun 1998 * The LOC_ID can also be a named (committed) datatype. * * Robb Matzke, 5 Jun 1998 * Like the group iterator, if ATTR_NUM is the null pointer then all * attributes are processed. * --------------------------------------------------------------------------*/ herr_t H5Aiterate(hid_t loc_id, unsigned *attr_num, H5A_operator_t op, void *op_data) { H5G_entry_t *ent = NULL; /*symtab ent of object to attribute */ H5A_t found_attr; herr_t ret_value = 0; int idx, start_idx; FUNC_ENTER_API(H5Aiterate, FAIL) H5TRACE4("e","i*Iuxx",loc_id,attr_num,op,op_data); /* check arguments */ if (H5I_FILE==H5I_get_type(loc_id) || H5I_ATTR==H5I_get_type(loc_id)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute") if (NULL==(ent=H5G_loc(loc_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location") /* * Look up the attribute for the object. Make certain the start point is * reasonable. */ start_idx = idx = (attr_num ? (int)*attr_num : 0); if (idx<0) HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index specified") if(idx0) HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index specified") if (attr_num) *attr_num = (unsigned)idx; done: FUNC_LEAVE_API(ret_value) } /* H5Aiterate() */ /*-------------------------------------------------------------------------- NAME H5Adelete PURPOSE Deletes an attribute from a location USAGE herr_t H5Adelete (loc_id, name) hid_t loc_id; IN: Object (dataset or group) to have attribute deleted from const char *name; IN: Name of attribute to delete RETURNS Non-negative on success/Negative on failure ERRORS DESCRIPTION This function removes the named attribute from a dataset or group. This function should not be used when attribute IDs are open on 'loc_id' as it may cause the internal indexes of the attributes to change and future writes to the open attributes to produce incorrect results. * * Modifications: * Robb Matzke, 5 Jun 1998 * The LOC_ID can also be a named (committed) datatype. * --------------------------------------------------------------------------*/ herr_t H5Adelete(hid_t loc_id, const char *name) { H5G_entry_t *ent = NULL; /*symtab ent of object to attribute */ int found; herr_t ret_value; FUNC_ENTER_API(H5Adelete, FAIL) H5TRACE2("e","is",loc_id,name); /* check arguments */ if (H5I_FILE==H5I_get_type(loc_id) || H5I_ATTR==H5I_get_type(loc_id)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute") if (NULL==(ent=H5G_loc(loc_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location") if (!name || !*name) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name") /* Look up the attribute index for the object */ if((found=H5A_get_index(ent,name,H5AC_dxpl_id))<0) HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "attribute not found") /* Delete the attribute from the location */ if ((ret_value=H5O_remove(ent, H5O_ATTR_ID, found, H5AC_dxpl_id)) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute header message") done: FUNC_LEAVE_API(ret_value) } /* H5Adelete() */ /*-------------------------------------------------------------------------- NAME H5Aclose PURPOSE Close an attribute ID USAGE herr_t H5Aclose (attr_id) hid_t attr_id; IN: Attribute to release access to RETURNS Non-negative on success/Negative on failure ERRORS DESCRIPTION This function releases an attribute from use. Further use of the attribute ID will result in undefined behavior. --------------------------------------------------------------------------*/ herr_t H5Aclose(hid_t attr_id) { herr_t ret_value=SUCCEED; /* Return value */ FUNC_ENTER_API(H5Aclose, FAIL) H5TRACE1("e","i",attr_id); /* check arguments */ if (NULL == H5I_object_verify(attr_id, H5I_ATTR)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute") /* Decrement references to that atom (and close it) */ if(H5I_dec_ref (attr_id)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTDEC, FAIL, "can't close attribute") done: FUNC_LEAVE_API(ret_value) } /* H5Aclose() */ /*------------------------------------------------------------------------- * Function: H5A_copy * * Purpose: Copies attribute OLD_ATTR. * * Return: Success: Pointer to a new copy of the OLD_ATTR argument. * * Failure: NULL * * Programmer: Robb Matzke * Thursday, December 4, 1997 * * Modifications: * *------------------------------------------------------------------------- */ H5A_t * H5A_copy(H5A_t *_new_attr, const H5A_t *old_attr, unsigned update_flags) { H5A_t *new_attr=NULL; hbool_t allocated_attr=FALSE; /* Whether the attribute was allocated */ H5A_t *ret_value=NULL; /* Return value */ FUNC_ENTER_NOAPI(H5A_copy, NULL) /* check args */ assert(old_attr); /* get space */ if(_new_attr==NULL) { /* Sanity check - We should not be only updating data if we don'y have anything */ HDassert(!(update_flags&H5O_UPDATE_DATA_ONLY)); if (NULL==(new_attr = H5FL_MALLOC(H5A_t))) HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed") allocated_attr=TRUE; } /* end if */ else new_attr=_new_attr; if(!(update_flags&H5O_UPDATE_DATA_ONLY)) { /* Copy the top level of the attribute */ *new_attr = *old_attr; /* Don't open the object header for a copy */ new_attr->ent_opened=0; /* Copy the guts of the attribute */ new_attr->name=HDstrdup(old_attr->name); new_attr->dt=H5T_copy(old_attr->dt, H5T_COPY_ALL); new_attr->ds=H5S_copy(old_attr->ds, FALSE); } /* end if */ if(old_attr->data) { if(!(update_flags&H5O_UPDATE_DATA_ONLY) || new_attr->data==NULL) { if (NULL==(new_attr->data=H5FL_BLK_MALLOC(attr_buf,old_attr->data_size))) HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed") } /* end if */ HDmemcpy(new_attr->data,old_attr->data,old_attr->data_size); } /* end if */ /* Set the return value */ ret_value=new_attr; done: if(ret_value==NULL) { if(new_attr!=NULL && allocated_attr) (void)H5A_close(new_attr); } /* end if */ FUNC_LEAVE_NOAPI(ret_value) } /*------------------------------------------------------------------------- * Function: H5A_free * * Purpose: Frees all memory associated with an attribute, but does not * free the H5A_t structure (which should be done in H5T_close). * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Monday, November 15, 2004 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5A_free(H5A_t *attr) { herr_t ret_value=SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(H5A_free, FAIL) assert(attr); /* Free dynamicly allocated items */ if(attr->name) H5MM_xfree(attr->name); if(attr->dt) if(H5T_close(attr->dt)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release datatype info") if(attr->ds) if(H5S_close(attr->ds)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release dataspace info") if(attr->data) H5FL_BLK_FREE(attr_buf, attr->data); done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5A_free() */ /*------------------------------------------------------------------------- * Function: H5A_close * * Purpose: Frees an attribute and all associated memory. * * Return: Non-negative on success/Negative on failure * * Programmer: Robb Matzke * Monday, December 8, 1997 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5A_close(H5A_t *attr) { herr_t ret_value=SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(H5A_close, FAIL) assert(attr); /* Check if the attribute has any data yet, if not, fill with zeroes */ if(attr->ent_opened && !attr->initialized) { uint8_t *tmp_buf=H5FL_BLK_CALLOC(attr_buf, attr->data_size); if (NULL == tmp_buf) HGOTO_ERROR(H5E_ATTR, H5E_NOSPACE, FAIL, "memory allocation failed for attribute fill-value") /* Go write the fill data to the attribute */ if (H5A_write(attr,attr->dt,tmp_buf,H5AC_dxpl_id)<0) HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "unable to write attribute") /* Free temporary buffer */ H5FL_BLK_FREE(attr_buf, tmp_buf); } /* end if */ /* Free dynamicly allocated items */ if(H5A_free(attr)<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release attribute info") /* Close the object's symbol-table entry */ if(attr->ent_opened) if(H5O_close(&(attr->ent))<0) HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release object header info") H5FL_FREE(H5A_t, attr); done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5A_close() */ /*------------------------------------------------------------------------- * Function: H5A_entof * * Purpose: Return the symbol table entry for an attribute. It's the * symbol table entry for the object to which the attribute * belongs, not the attribute itself. * * Return: Success: Ptr to entry * * Failure: NULL * * Programmer: Robb Matzke * Thursday, August 6, 1998 * * Modifications: * *------------------------------------------------------------------------- */ H5G_entry_t * H5A_entof(H5A_t *attr) { H5G_entry_t *ret_value; /* Return value */ FUNC_ENTER_NOAPI(H5A_entof, NULL) assert(attr); /* Set return value */ ret_value=&(attr->ent); done: FUNC_LEAVE_NOAPI(ret_value) }