/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /*------------------------------------------------------------------------- * * Created: H5Oattribute.c * Dec 11 2006 * Quincey Koziol * * Purpose: Object header attribute routines. * *------------------------------------------------------------------------- */ /****************/ /* Module Setup */ /****************/ #define H5A_PACKAGE /*suppress error about including H5Apkg */ #define H5O_PACKAGE /*suppress error about including H5Opkg */ /***********/ /* Headers */ /***********/ #include "H5private.h" /* Generic Functions */ #include "H5Apkg.h" /* Attributes */ #include "H5Eprivate.h" /* Error handling */ #include "H5MMprivate.h" /* Memory management */ #include "H5Opkg.h" /* Object headers */ #include "H5SMprivate.h" /* Shared Object Header Messages */ /****************/ /* Local Macros */ /****************/ /******************/ /* Local Typedefs */ /******************/ /* User data for iteration when converting attributes to dense storage */ typedef struct { H5F_t *f; /* Pointer to file for insertion */ hid_t dxpl_id; /* DXPL during iteration */ } H5O_iter_cvt_t; /* User data for iteration when opening an attribute */ typedef struct { /* down */ H5F_t *f; /* Pointer to file attribute is in */ hid_t dxpl_id; /* DXPL for operation */ const char *name; /* Name of attribute to open */ /* up */ H5A_t *attr; /* Attribute data to update object header with */ } H5O_iter_opn_t; /* User data for iteration when updating an attribute */ typedef struct { /* down */ H5F_t *f; /* Pointer to file attribute is in */ hid_t dxpl_id; /* DXPL for operation */ H5A_t *attr; /* Attribute data to update object header with */ /* up */ hbool_t found; /* Whether the attribute was found */ } H5O_iter_wrt_t; /* User data for iteration when renaming an attribute */ typedef struct { /* down */ H5F_t *f; /* Pointer to file attribute is in */ hid_t dxpl_id; /* DXPL for operation */ const char *old_name; /* Old name of attribute */ const char *new_name; /* New name of attribute */ /* up */ hbool_t found; /* Whether the attribute was found */ } H5O_iter_ren_t; /* User data for iteration when iterating over attributes */ typedef struct { /* down */ H5F_t *f; /* Pointer to file attribute is in */ hid_t dxpl_id; /* DXPL for operation */ hid_t loc_id; /* ID of object being iterated over */ unsigned skip; /* # of attributes to skip over */ H5A_operator_t op; /* Callback routine for each attribute */ void *op_data; /* User data for callback */ /* up */ unsigned count; /* Count of attributes examined */ } H5O_iter_itr_t; /* User data for iteration when removing an attribute */ typedef struct { /* down */ H5F_t *f; /* Pointer to file attribute is in */ hid_t dxpl_id; /* DXPL for operation */ const char *name; /* Name of attribute to open */ /* up */ hbool_t found; /* Found attribute to delete */ } H5O_iter_rm_t; /********************/ /* Package Typedefs */ /********************/ /********************/ /* Local Prototypes */ /********************/ /*********************/ /* Package Variables */ /*********************/ /*****************************/ /* Library Private Variables */ /*****************************/ /*******************/ /* Local Variables */ /*******************/ /*------------------------------------------------------------------------- * Function: H5O_attr_to_dense_cb * * Purpose: Object header iterator callback routine to convert compact * attributes to dense attributes * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 4 2006 * *------------------------------------------------------------------------- */ static herr_t H5O_attr_to_dense_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned UNUSED sequence, unsigned *oh_flags_ptr, void *_udata/*in,out*/) { H5O_iter_cvt_t *udata = (H5O_iter_cvt_t *)_udata; /* Operator user data */ H5A_t *attr = (H5A_t *)mesg->native; /* Pointer to attribute to insert */ herr_t ret_value = H5_ITER_CONT; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_to_dense_cb) /* check args */ HDassert(oh); HDassert(mesg); /* Insert attribute into dense storage */ if(H5A_dense_insert(udata->f, udata->dxpl_id, oh, attr) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to add to dense storage") /* Convert message into a null message in the header */ /* (don't delete attribute's space in the file though) */ if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, FALSE, FALSE) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to convert into null message") /* Indicate that the object header was modified */ *oh_flags_ptr |= H5AC__DIRTIED_FLAG; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_to_dense_cb() */ /*------------------------------------------------------------------------- * Function: H5O_attr_create * * Purpose: Create a new attribute in the object header. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Friday, December 8, 2006 * *------------------------------------------------------------------------- */ herr_t H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr) { H5O_t *oh = NULL; /* Pointer to actual object header */ unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for object header */ htri_t shared_mesg; /* Should this message be stored in the Shared Message table? */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_create) /* Check arguments */ HDassert(loc); HDassert(attr); /* Protect the object header to iterate over */ if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_WRITE))) HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, FAIL, "unable to load object header") /* Check for switching to "dense" attribute storage */ if(oh->version > H5O_VERSION_1 && oh->nattrs == oh->max_compact && !H5F_addr_defined(oh->attr_fheap_addr)) { H5O_iter_cvt_t udata; /* User data for callback */ H5O_mesg_operator_t op; /* Wrapper for operator */ /* Create dense storage for attributes */ if(H5A_dense_create(loc->file, dxpl_id, oh) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to create dense storage for attributes") /* Set up user data for callback */ udata.f = loc->file; udata.dxpl_id = dxpl_id; /* Iterate over existing attributes, moving them to dense storage */ op.lib_op = H5O_attr_to_dense_cb; if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTCONVERT, FAIL, "error converting attributes to dense storage") } /* end if */ /* Increment attribute count */ oh->nattrs++; /* Check if the object is tracking creation order on attributes */ if(oh->flags & H5P_CRT_ORDER_TRACKED) { /* Check for attribute creation order index on the object wrapping around */ if(oh->max_attr_crt_idx == H5O_MAX_CRT_ORDER_IDX) HGOTO_ERROR(H5E_ATTR, H5E_CANTINC, FAIL, "Attribute creation index can't be incremented") /* Set the creation order index on the attribute & incr. creation order index */ attr->crt_idx = oh->max_attr_crt_idx++; } /* end if */ /* Check for storing attribute with dense storage */ if(H5F_addr_defined(oh->attr_fheap_addr)) { /* Insert attribute into dense storage */ if(H5A_dense_insert(loc->file, dxpl_id, oh, attr) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to add to dense storage") } /* end if */ else { /* Append new message to object header */ if(H5O_msg_append_real(loc->file, dxpl_id, oh, H5O_MSG_ATTR, 0, 0, attr, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to create new attribute in header") } /* end else */ /* Was new attribugte shared? */ if((shared_mesg = H5O_attr_is_shared(attr)) > 0) { hsize_t attr_rc; /* Attribute's ref count in shared message storage */ /* Retrieve ref count for shared attribute */ if(H5SM_get_refcount(loc->file, dxpl_id, H5O_ATTR_ID, &attr->sh_loc, &attr_rc) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve shared message ref count") /* If this is not the first copy of the attribute in the shared message * storage, decrement the reference count on any shared components * of the attribute. This is done because the shared message * storage's "try delete" call doesn't call the message class's * "delete" callback until the reference count drops to zero. * However, attributes have already increased the reference * count on shared components before passing the attribute * to the shared message code to manage, causing an asymmetry * in the reference counting for any shared components. * * The alternate solution is to have the shared message's "try * delete" code always call the message class's "delete" callback, * even when the reference count is positive. This can be done * without an appreciable performance hit (by using H5HF_op() in * the shared message comparison v2 B-tree callback), but it has * the undesirable side-effect of leaving the reference count on * the attribute's shared components artificially (and possibly * misleadingly) high, because there's only one shared attribute * referencing the shared components, not objects referencing the shared components. * * *ick* -QAK, 2007/01/08 */ if(attr_rc > 1) { if(H5O_attr_delete(loc->file, dxpl_id, attr, TRUE) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute") } /* end if */ } /* end if */ else if(shared_mesg < 0) HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "error determining if message should be shared") /* Update the modification time, if any */ if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object") done: if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0) HDONE_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_create() */ /*------------------------------------------------------------------------- * Function: H5O_attr_open_cb * * Purpose: Object header iterator callback routine to open an * attribute stored compactly. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 11 2006 * *------------------------------------------------------------------------- */ static herr_t H5O_attr_open_cb(H5O_t UNUSED *oh, H5O_mesg_t *mesg/*in,out*/, unsigned UNUSED sequence, unsigned UNUSED *oh_flags_ptr, void *_udata/*in,out*/) { H5O_iter_opn_t *udata = (H5O_iter_opn_t *)_udata; /* Operator user data */ herr_t ret_value = H5_ITER_CONT; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_open_cb) /* check args */ HDassert(oh); HDassert(mesg); HDassert(!udata->attr); /* Check for correct attribute message to modify */ if(HDstrcmp(((H5A_t *)mesg->native)->name, udata->name) == 0) { /* Make a copy of the attribute to return */ if(NULL == (udata->attr = H5A_copy(NULL, (H5A_t *)mesg->native))) HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "unable to copy attribute") /* Stop iterating */ ret_value = H5_ITER_STOP; } /* end if */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_open_cb() */ /*------------------------------------------------------------------------- * Function: H5O_attr_open_by_name * * Purpose: Open an existing attribute in an object header. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Monday, December 11, 2006 * *------------------------------------------------------------------------- */ H5A_t * H5O_attr_open_by_name(const H5O_loc_t *loc, const char *name, hid_t dxpl_id) { H5O_t *oh = NULL; /* Pointer to actual object header */ unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for object header */ H5A_t *ret_value; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_open_by_name) /* Check arguments */ HDassert(loc); HDassert(name); /* Protect the object header to iterate over */ if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_READ))) HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, NULL, "unable to load object header") /* Check for opening attribute with dense storage */ if(H5F_addr_defined(oh->attr_fheap_addr)) { /* Open attribute in dense storage */ if(NULL == (ret_value = H5A_dense_open(loc->file, dxpl_id, oh, name))) HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "can't open attribute") } /* end if */ else { H5O_iter_opn_t udata; /* User data for callback */ H5O_mesg_operator_t op; /* Wrapper for operator */ /* Set up user data for callback */ udata.f = loc->file; udata.dxpl_id = dxpl_id; udata.name = name; udata.attr = NULL; /* Iterate over attributes, to locate correct one to open */ op.lib_op = H5O_attr_open_cb; if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "error updating attribute") /* Check that we found the attribute */ if(!udata.attr) HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "can't locate attribute") /* Get attribute opened from object header */ HDassert(udata.attr); ret_value = udata.attr; } /* end else */ done: if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0) HDONE_ERROR(H5E_ATTR, H5E_PROTECT, NULL, "unable to release object header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_open_by_name() */ /*------------------------------------------------------------------------- * Function: H5O_attr_open_by_idx * * Purpose: Callback routine opening an attribute by index * * Return: Success: Non-negative * Failure: Negative * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 18 2006 * *------------------------------------------------------------------------- */ static herr_t H5O_attr_open_by_idx_cb(const H5A_t *attr, void *_ret_attr) { H5A_t **ret_attr = (H5A_t **)_ret_attr; /* 'User data' passed in */ herr_t ret_value = H5_ITER_STOP; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_open_by_idx_cb) /* check arguments */ HDassert(attr); HDassert(ret_attr); /* Copy attribute information */ if(NULL == (*ret_attr = H5A_copy(NULL, attr))) HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_open_by_idx_cb() */ /*------------------------------------------------------------------------- * Function: H5O_attr_open_by_idx * * Purpose: Open an existing attribute in an object header according to * an index. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Monday, December 18, 2006 * *------------------------------------------------------------------------- */ H5A_t * H5O_attr_open_by_idx(const H5O_loc_t *loc, hsize_t n, hid_t dxpl_id) { H5A_attr_iter_op_t attr_op; /* Attribute operator */ H5A_t *ret_value = NULL; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_open_by_idx) /* Check arguments */ HDassert(loc); /* Build attribute operator info */ attr_op.op_type = H5A_ATTR_OP_LIB; attr_op.u.lib_op = H5O_attr_open_by_idx_cb; /* Iterate over attributes to locate correct one */ if(H5O_attr_iterate((hid_t)-1, loc, dxpl_id, H5_ITER_INC, (unsigned)n, NULL, &attr_op, &ret_value) < 0) HGOTO_ERROR(H5E_ATTR, H5E_BADITER, NULL, "can't locate attribute") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_open_by_idx() */ /*------------------------------------------------------------------------- * Function: H5O_attr_update_shared * * Purpose: Update a shared attribute. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Jan 2 2007 * *------------------------------------------------------------------------- */ herr_t H5O_attr_update_shared(H5F_t *f, hid_t dxpl_id, H5A_t *attr, H5O_shared_t *update_sh_mesg) { H5O_shared_t sh_mesg; /* Shared object header message */ hsize_t attr_rc; /* Attribute's ref count in shared message storage */ htri_t shared_mesg; /* Whether the message should be shared */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_update_shared) /* check args */ HDassert(f); HDassert(attr); /* Extract shared message info from current attribute (for later use) */ if(NULL == H5O_attr_get_share(attr, &sh_mesg)) HGOTO_ERROR(H5E_ATTR, H5E_BADMESG, FAIL, "can't get shared info") /* Store new version of message as a SOHM */ /* (should always work, since we're not changing the size of the attribute) */ if((shared_mesg = H5SM_try_share(f, dxpl_id, H5O_ATTR_ID, attr)) == 0) HGOTO_ERROR(H5E_ATTR, H5E_BADMESG, FAIL, "attribute changed sharing status") else if(shared_mesg < 0) HGOTO_ERROR(H5E_ATTR, H5E_BADMESG, FAIL, "can't share attribute") /* Retrieve shared message storage ref count for new shared attribute */ if(H5SM_get_refcount(f, dxpl_id, H5O_ATTR_ID, &attr->sh_loc, &attr_rc) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve shared message ref count") /* If the newly shared attribute needs to share "ownership" of the shared * components (ie. its reference count is 1), increment the reference * count on any shared components of the attribute, so that they won't * be removed from the file. (Essentially a "copy on write" operation). * * *ick* -QAK, 2007/01/08 */ if(attr_rc == 1) { /* Increment reference count on attribute components */ if(H5O_attr_link(f, dxpl_id, attr) < 0) HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust attribute link count") } /* end if */ /* Remove the old attribute from the SOHM storage */ if(H5SM_try_delete(f, dxpl_id, H5O_ATTR_ID, &sh_mesg) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to delete shared attribute in shared storage") /* Extract updated shared message info from modified attribute, if requested */ if(update_sh_mesg) if(NULL == H5O_attr_get_share(attr, update_sh_mesg)) HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get shared info") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_update_shared() */ /*------------------------------------------------------------------------- * Function: H5O_attr_write_cb * * Purpose: Object header iterator callback routine to update an * attribute stored compactly. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 4 2006 * *------------------------------------------------------------------------- */ static herr_t H5O_attr_write_cb(H5O_t UNUSED *oh, H5O_mesg_t *mesg/*in,out*/, unsigned UNUSED sequence, unsigned *oh_flags_ptr, void *_udata/*in,out*/) { H5O_iter_wrt_t *udata = (H5O_iter_wrt_t *)_udata; /* Operator user data */ herr_t ret_value = H5_ITER_CONT; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_write_cb) /* check args */ HDassert(oh); HDassert(mesg); HDassert(!udata->found); /* Check for correct attribute message to modify */ if(HDstrcmp(((H5A_t *)mesg->native)->name, udata->attr->name) == 0) { /* Update the shared attribute in the SOHM storage */ if(mesg->flags & H5O_MSG_FLAG_SHARED) { if(H5O_attr_update_shared(udata->f, udata->dxpl_id, udata->attr, (H5O_shared_t *)mesg->native) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, H5_ITER_ERROR, "unable to update attribute in shared storage") } /* end if */ /* Allocate storage for the message's data, if necessary */ if(((H5A_t *)mesg->native)->data == NULL) if(NULL == (((H5A_t *)mesg->native)->data = H5FL_BLK_MALLOC(attr_buf, udata->attr->data_size))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed") /* Copy the data into the header message */ HDmemcpy(((H5A_t *)mesg->native)->data, udata->attr->data, udata->attr->data_size); /* Mark message as dirty */ mesg->dirty = TRUE; /* Indicate that the object header was modified */ *oh_flags_ptr |= H5AC__DIRTIED_FLAG; /* Indicate that the attribute was found */ udata->found = TRUE; /* Stop iterating */ ret_value = H5_ITER_STOP; } /* end if */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_write_cb() */ /*------------------------------------------------------------------------- * Function: H5O_attr_write * * Purpose: Write a new value to an attribute. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Monday, December 4, 2006 * *------------------------------------------------------------------------- */ herr_t H5O_attr_write(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr) { H5O_t *oh = NULL; /* Pointer to actual object header */ unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for object header */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_write) /* Check arguments */ HDassert(loc); HDassert(attr); /* Protect the object header to iterate over */ if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_WRITE))) HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, FAIL, "unable to load object header") /* Check for attributes stored densely */ if(H5F_addr_defined(oh->attr_fheap_addr)) { /* Modify the attribute data in dense storage */ if(H5A_dense_write(loc->file, dxpl_id, oh, attr) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute") } /* end if */ else { H5O_iter_wrt_t udata; /* User data for callback */ H5O_mesg_operator_t op; /* Wrapper for operator */ /* Set up user data for callback */ udata.f = loc->file; udata.dxpl_id = dxpl_id; udata.attr = attr; udata.found = FALSE; /* Iterate over attributes, to locate correct one to update */ op.lib_op = H5O_attr_write_cb; if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute") /* Check that we found the attribute */ if(!udata.found) HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "can't locate open attribute?") } /* end else */ /* Update the modification time, if any */ if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object") done: if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0) HDONE_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_write */ /*------------------------------------------------------------------------- * Function: H5O_attr_rename_chk_cb * * Purpose: Object header iterator callback routine to check for * duplicate name during rename * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 5 2006 * *------------------------------------------------------------------------- */ static herr_t H5O_attr_rename_chk_cb(H5O_t UNUSED *oh, H5O_mesg_t *mesg/*in,out*/, unsigned UNUSED sequence, unsigned UNUSED *oh_flags_ptr, void *_udata/*in,out*/) { H5O_iter_ren_t *udata = (H5O_iter_ren_t *)_udata; /* Operator user data */ herr_t ret_value = H5_ITER_CONT; /* Return value */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5O_attr_rename_chk_cb) /* check args */ HDassert(oh); HDassert(mesg); HDassert(!udata->found); /* Check for existing attribute with new name */ if(HDstrcmp(((H5A_t *)mesg->native)->name, udata->new_name) == 0) { /* Indicate that we found an existing attribute with the new name*/ udata->found = TRUE; /* Stop iterating */ ret_value = H5_ITER_STOP; } /* end if */ FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_rename_chk_cb() */ /*------------------------------------------------------------------------- * Function: H5O_attr_rename_mod_cb * * Purpose: Object header iterator callback routine to change name of * attribute during rename * * Note: This routine doesn't currently allow an attribute to change * its "shared" status, if the name change would cause a size * difference that would put it into a different category. * Something for later... * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 5 2006 * *------------------------------------------------------------------------- */ static herr_t H5O_attr_rename_mod_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned UNUSED sequence, unsigned *oh_flags_ptr, void *_udata/*in,out*/) { H5O_iter_ren_t *udata = (H5O_iter_ren_t *)_udata; /* Operator user data */ herr_t ret_value = H5_ITER_CONT; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_rename_mod_cb) /* check args */ HDassert(oh); HDassert(mesg); HDassert(!udata->found); /* Find correct attribute message to rename */ if(HDstrcmp(((H5A_t *)mesg->native)->name, udata->old_name) == 0) { /* Change the name for the attribute */ H5MM_xfree(((H5A_t *)mesg->native)->name); ((H5A_t *)mesg->native)->name = H5MM_xstrdup(udata->new_name); /* Mark message as dirty */ mesg->dirty = TRUE; /* Check for shared message */ if(mesg->flags & H5O_MSG_FLAG_SHARED) { /* Update the shared attribute in the SOHM storage */ if(H5O_attr_update_shared(udata->f, udata->dxpl_id, mesg->native, NULL) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, H5_ITER_ERROR, "unable to update attribute in shared storage") } /* end if */ else { /* Sanity check */ HDassert(H5O_attr_is_shared((H5A_t *)mesg->native) == FALSE); /* Check for attribute message changing size */ if(HDstrlen(udata->new_name) != HDstrlen(udata->old_name)) { H5A_t *attr; /* Attribute to re-add */ /* Take ownership of the message's native info (the attribute) * so any shared objects in the file aren't adjusted (and * possibly deleted) when the message is released. */ /* (We do this more complicated sequence of actions because the * simpler solution of adding the modified attribute first * and then deleting the old message can re-allocate the * list of messages during the "add the modified attribute" * step, invalidating the message pointer we have here - QAK) */ attr = (H5A_t *)mesg->native; mesg->native = NULL; /* If the later version of the object header format, decrement attribute */ /* (must be decremented before call to H5O_release_mesg(), * so that the sanity checks pass - QAK) */ if(oh->version > H5O_VERSION_1) oh->nattrs--; /* Delete old attribute */ /* (doesn't decrement the link count on shared components becuase * the "native" pointer has been reset) */ if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, FALSE, FALSE) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to release previous attribute") /* Increment attribute count */ /* (must be incremented before call to H5O_msg_append_real(), * so that the sanity checks pass - QAK) */ if(oh->version > H5O_VERSION_1) oh->nattrs++; /* Append renamed attribute to object header */ /* (Don't let it become shared) */ if(H5O_msg_append_real(udata->f, udata->dxpl_id, oh, H5O_MSG_ATTR, (mesg->flags | H5O_MSG_FLAG_DONTSHARE), 0, attr, oh_flags_ptr) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to relocate renamed attribute in header") /* Sanity check */ HDassert(H5O_attr_is_shared(attr) == FALSE); /* Release the local copy of the attribute */ H5O_msg_free_real(H5O_MSG_ATTR, attr); } /* end if */ } /* end else */ /* Indicate that the object header was modified */ *oh_flags_ptr |= H5AC__DIRTIED_FLAG; /* Indicate that we found an existing attribute with the old name */ udata->found = TRUE; /* Stop iterating */ ret_value = H5_ITER_STOP; } /* end if */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_rename_mod_cb() */ /*------------------------------------------------------------------------- * Function: H5O_attr_rename * * Purpose: Rename an attribute. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Tuesday, December 5, 2006 * *------------------------------------------------------------------------- */ herr_t H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id, const char *old_name, const char *new_name) { H5O_t *oh = NULL; /* Pointer to actual object header */ unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for object header */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_rename) /* Check arguments */ HDassert(loc); HDassert(old_name); HDassert(new_name); /* Protect the object header to iterate over */ if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_WRITE))) HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, FAIL, "unable to load object header") /* Check for attributes stored densely */ if(H5F_addr_defined(oh->attr_fheap_addr)) { /* Rename the attribute data in dense storage */ if(H5A_dense_rename(loc->file, dxpl_id, oh, old_name, new_name) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute") } /* end if */ else { H5O_iter_ren_t udata; /* User data for callback */ H5O_mesg_operator_t op; /* Wrapper for operator */ /* Set up user data for callback */ udata.f = loc->file; udata.dxpl_id = dxpl_id; udata.old_name = old_name; udata.new_name = new_name; udata.found = FALSE; /* Iterate over attributes, to check if "new name" exists already */ op.lib_op = H5O_attr_rename_chk_cb; if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute") /* If the new name was found, indicate an error */ if(udata.found) HGOTO_ERROR(H5E_ATTR, H5E_EXISTS, FAIL, "attribute with new name already exists") /* Iterate over attributes again, to actually rename attribute with old name */ op.lib_op = H5O_attr_rename_mod_cb; if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute") /* Check that we found the attribute to rename */ if(!udata.found) HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "can't locate attribute with old name") } /* end else */ /* Update the modification time, if any */ if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object") done: if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0) HDONE_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_rename */ /*------------------------------------------------------------------------- * Function: H5O_attr_iterate * * Purpose: Iterate over attributes for an object. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Tuesday, December 5, 2006 * *------------------------------------------------------------------------- */ herr_t H5O_attr_iterate(hid_t loc_id, const H5O_loc_t *loc, hid_t dxpl_id, H5_iter_order_t order, unsigned skip, unsigned *last_attr, const H5A_attr_iter_op_t *attr_op, void *op_data) { H5O_t *oh = NULL; /* Pointer to actual object header */ unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for object header */ H5A_attr_table_t atable = {0, NULL}; /* Table of attributes */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_iterate) /* Check arguments */ HDassert(loc); HDassert(attr_op); /* Protect the object header to iterate over */ if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_READ))) HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, FAIL, "unable to load object header") /* Check for attributes stored densely */ if(oh->version > H5O_VERSION_1 && H5F_addr_defined(oh->attr_fheap_addr)) { haddr_t attr_fheap_addr; /* Address of fractal heap for dense attribute storage */ haddr_t name_bt2_addr; /* Address of v2 B-tree for name index on dense attribute storage */ /* Retrieve the information about dense attribute storage */ attr_fheap_addr = oh->attr_fheap_addr; name_bt2_addr = oh->name_bt2_addr; /* Release the object header */ if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") oh = NULL; /* Iterate over attributes in dense storage */ if((ret_value = H5A_dense_iterate(loc->file, dxpl_id, loc_id, attr_fheap_addr, name_bt2_addr, order, skip, last_attr, attr_op, op_data)) < 0) HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes"); } /* end if */ else { /* Build table of attributes for compact storage */ if(H5A_compact_build_table(loc->file, dxpl_id, oh, H5_INDEX_NAME, H5_ITER_INC, &atable, &oh_flags) < 0) HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "error building attribute table") /* Release the object header */ if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") oh = NULL; /* Check for skipping too many attributes */ if(skip > 0) { /* Check for bad starting index */ if(skip >= atable.nattrs) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index specified") } /* end if */ /* Iterate over attributes in table */ if((ret_value = H5A_attr_iterate_table(&atable, skip, last_attr, loc_id, attr_op, op_data)) < 0) HERROR(H5E_ATTR, H5E_CANTNEXT, "iteration operator failed"); } /* end else */ done: /* Release resources */ if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0) HDONE_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") if(atable.attrs && H5A_attr_release_table(&atable) < 0) HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute table") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_iterate */ /*------------------------------------------------------------------------- * Function: H5O_attr_remove_cb * * Purpose: Object header iterator callback routine to remove an * attribute stored compactly. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 11 2006 * *------------------------------------------------------------------------- */ static herr_t H5O_attr_remove_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned UNUSED sequence, unsigned *oh_flags_ptr, void *_udata/*in,out*/) { H5O_iter_rm_t *udata = (H5O_iter_rm_t *)_udata; /* Operator user data */ herr_t ret_value = H5_ITER_CONT; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_remove_cb) /* check args */ HDassert(oh); HDassert(mesg); HDassert(!udata->found); /* Check for correct attribute message to modify */ if(HDstrcmp(((H5A_t *)mesg->native)->name, udata->name) == 0) { /* If the later version of the object header format, decrement attribute */ /* (must be decremented before call to H5O_release_mesg(), in order for * sanity checks to pass - QAK) */ if(oh->version > H5O_VERSION_1) oh->nattrs--; /* Convert message into a null message (i.e. delete it) */ if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, TRUE, TRUE) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to convert into null message") /* Indicate that the object header was modified */ *oh_flags_ptr |= H5AC__DIRTIED_FLAG; /* Indicate that this message is the attribute to be deleted */ udata->found = TRUE; /* Stop iterating */ ret_value = H5_ITER_STOP; } /* end if */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_remove_cb() */ /*------------------------------------------------------------------------- * Function: H5O_attr_remove * * Purpose: Delete an attributes on an object. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Monday, December 11, 2006 * *------------------------------------------------------------------------- */ herr_t H5O_attr_remove(const H5O_loc_t *loc, const char *name, hid_t dxpl_id) { H5O_t *oh = NULL; /* Pointer to actual object header */ unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for object header */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_remove) /* Check arguments */ HDassert(loc); HDassert(name); /* Protect the object header to iterate over */ if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_WRITE))) HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, FAIL, "unable to load object header") /* Check for attributes stored densely */ if(H5F_addr_defined(oh->attr_fheap_addr)) { /* Delete attribute from dense storage */ if(H5A_dense_remove(loc->file, dxpl_id, oh, name) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute in dense storage") /* Decrement # of attributes on object */ oh->nattrs--; } /* end if */ else { H5O_iter_rm_t udata; /* User data for callback */ H5O_mesg_operator_t op; /* Wrapper for operator */ /* Set up user data for callback */ udata.f = loc->file; udata.dxpl_id = dxpl_id; udata.name = name; udata.found = FALSE; /* Iterate over attributes, to locate correct one to delete */ op.lib_op = H5O_attr_remove_cb; if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "error deleting attribute") /* Check that we found the attribute */ if(!udata.found) HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "can't locate attribute") } /* end else */ /* Check for shifting from dense storage back to compact storage */ if(H5F_addr_defined(oh->attr_fheap_addr) && (oh->nattrs == 0 || oh->nattrs < oh->min_dense)) { /* Check if there's no more attributes */ if(oh->nattrs == 0) { /* Delete the dense storage */ if(H5A_dense_delete(loc->file, dxpl_id, oh) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete dense attribute storage") } /* end if */ else { H5A_attr_table_t atable = {0, NULL}; /* Table of attributes */ hbool_t can_convert = TRUE; /* Whether converting to attribute messages is possible */ size_t u; /* Local index */ /* Build the table of attributes for this object */ if(H5A_dense_build_table(loc->file, dxpl_id, oh->nattrs, oh->attr_fheap_addr, oh->name_bt2_addr, H5_INDEX_NAME, H5_ITER_NATIVE, &atable) < 0) HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "error building attribute table") /* Inspect attributes in table for ones that can't be converted back * into attribute message form (currently only attributes which * can't fit into an object header message) */ for(u = 0; u < oh->nattrs; u++) if(H5O_msg_mesg_size(loc->file, H5O_ATTR_ID, &(atable.attrs[u]), (size_t)0) >= H5O_MESG_MAX_SIZE) { can_convert = FALSE; break; } /* end if */ /* If ok, insert attributes as object header messages */ if(can_convert) { /* Iterate over attributes, to put them into header */ for(u = 0; u < oh->nattrs; u++) { htri_t shared_mesg; /* Should this message be stored in the Shared Message table? */ /* Check if attribute is shared */ if((shared_mesg = H5O_attr_is_shared(&(atable.attrs[u]))) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "error determining if message is shared") else if(shared_mesg == 0) { /* Increment reference count on attribute components */ /* (so that they aren't deleted when the dense attribute storage is deleted) */ if(H5O_attr_link(loc->file, dxpl_id, &(atable.attrs[u])) < 0) HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust attribute link count") } /* end if */ else { /* Reset 'shared' status, so attributes will be shared again */ atable.attrs[u].sh_loc.flags = 0; } /* end else */ /* Insert attribute message into object header */ /* (Will increment reference count on shared attributes) */ if(H5O_msg_append_real(loc->file, dxpl_id, oh, H5O_MSG_ATTR, 0, 0, &(atable.attrs[u]), &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "can't create message") } /* end for */ /* Remove the dense storage */ if(H5A_dense_delete(loc->file, dxpl_id, oh) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete dense attribute storage") /* Update the modification time, if any */ if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object") } /* end if */ /* Free attribute table information */ if(H5A_attr_release_table(&atable) < 0) HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute table") } /* end else */ } /* end if */ done: if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0) HDONE_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_remove */ /*------------------------------------------------------------------------- * Function: H5O_attr_count * * Purpose: Determine the # of attributes on an object * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Monday, December 11, 2006 * *------------------------------------------------------------------------- */ int H5O_attr_count(const H5O_loc_t *loc, hid_t dxpl_id) { H5O_t *oh = NULL; /* Pointer to actual object header */ int ret_value; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_count) /* Check arguments */ HDassert(loc); /* Protect the object header to iterate over */ if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_READ))) HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, FAIL, "unable to load object header") /* Check for attributes stored densely */ if(oh->version > H5O_VERSION_1) ret_value = (int)oh->nattrs; else { unsigned u; /* Local index variable */ /* Loop over all messages, counting the attributes */ for(u = ret_value = 0; u < oh->nmesgs; u++) if(oh->mesg[u].type == H5O_MSG_ATTR) ret_value++; } /* end else */ done: if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, H5AC__NO_FLAGS_SET) < 0) HDONE_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_count */ /*------------------------------------------------------------------------- * Function: H5O_attr_exists_cb * * Purpose: Object header iterator callback routine to check for an * attribute stored compactly, by name. * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Dec 11 2006 * *------------------------------------------------------------------------- */ static herr_t H5O_attr_exists_cb(H5O_t UNUSED *oh, H5O_mesg_t *mesg/*in,out*/, unsigned UNUSED sequence, unsigned UNUSED *oh_flags_ptr, void *_udata/*in,out*/) { H5O_iter_rm_t *udata = (H5O_iter_rm_t *)_udata; /* Operator user data */ herr_t ret_value = H5_ITER_CONT; /* Return value */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5O_attr_exists_cb) /* check args */ HDassert(mesg); HDassert(!udata->found); /* Check for correct attribute message */ if(HDstrcmp(((H5A_t *)mesg->native)->name, udata->name) == 0) { /* Indicate that this message is the attribute sought */ udata->found = TRUE; /* Stop iterating */ ret_value = H5_ITER_STOP; } /* end if */ FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_exists_cb() */ /*------------------------------------------------------------------------- * Function: H5O_attr_exists * * Purpose: Determine if an attribute with a particular name exists on an object * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Monday, December 11, 2006 * *------------------------------------------------------------------------- */ htri_t H5O_attr_exists(const H5O_loc_t *loc, const char *name, hid_t dxpl_id) { H5O_t *oh = NULL; /* Pointer to actual object header */ unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for object header */ htri_t ret_value; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_exists) /* Check arguments */ HDassert(loc); HDassert(name); /* Protect the object header to iterate over */ if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_READ))) HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, FAIL, "unable to load object header") /* Check for attributes stored densely */ if(H5F_addr_defined(oh->attr_fheap_addr)) { /* Check if attribute exists in dense storage */ if((ret_value = H5A_dense_exists(loc->file, dxpl_id, oh, name)) < 0) HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error checking for existence of attribute") } /* end if */ else { H5O_iter_rm_t udata; /* User data for callback */ H5O_mesg_operator_t op; /* Wrapper for operator */ /* Set up user data for callback */ udata.f = loc->file; udata.dxpl_id = dxpl_id; udata.name = name; udata.found = FALSE; /* Iterate over existing attributes, checking for attribute with same name */ op.lib_op = H5O_attr_exists_cb; if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, &oh_flags) < 0) HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error checking for existence of attribute") /* Check that we found the attribute */ ret_value = udata.found; } /* end else */ done: if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, H5AC__NO_FLAGS_SET) < 0) HDONE_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O_attr_exists */