/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Copyright by The HDF Group. * * Copyright by the Board of Trustees of the University of Illinois. * * All rights reserved. * * * * This file is part of HDF5. The full HDF5 copyright notice, including * * terms governing use, modification, and redistribution, is contained in * * the COPYING file, which can be found at the root of the source code * * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. * * If you do not have access to either file, you may request a copy from * * help@hdfgroup.org. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ #include "H5Zmodule.h" /* This source code file is part of the H5Z module */ #include "H5private.h" /* Generic Functions */ #include "H5Dprivate.h" /* Dataset functions */ #include "H5Eprivate.h" /* Error handling */ #include "H5Fprivate.h" /* File */ #include "H5Iprivate.h" /* IDs */ #include "H5MMprivate.h" /* Memory management */ #include "H5Oprivate.h" /* Object headers */ #include "H5Pprivate.h" /* Property lists */ #include "H5PLprivate.h" /* Plugins */ #include "H5Sprivate.h" /* Dataspace functions */ #include "H5Zpkg.h" /* Data filters */ #ifdef H5_HAVE_SZLIB_H # include "szlib.h" #endif /* Local typedefs */ #ifdef H5Z_DEBUG typedef struct H5Z_stats_t { struct { hsize_t total; /* total number of bytes processed */ hsize_t errors; /* bytes of total attributable to errors */ H5_timer_t timer; /* execution time including errors */ } stats[2]; /* 0=output, 1=input */ } H5Z_stats_t; #endif /* H5Z_DEBUG */ typedef struct H5Z_object_t { H5Z_filter_t filter_id; /* ID of the filter we're looking for */ htri_t found; /* Whether we find an object using the filter */ } H5Z_object_t; /* Enumerated type for dataset creation prelude callbacks */ typedef enum { H5Z_PRELUDE_CAN_APPLY, /* Call "can apply" callback */ H5Z_PRELUDE_SET_LOCAL /* Call "set local" callback */ } H5Z_prelude_type_t; /* Package initialization variable */ hbool_t H5_PKG_INIT_VAR = FALSE; /* Local variables */ static size_t H5Z_table_alloc_g = 0; static size_t H5Z_table_used_g = 0; static H5Z_class2_t *H5Z_table_g = NULL; #ifdef H5Z_DEBUG static H5Z_stats_t *H5Z_stat_table_g = NULL; #endif /* H5Z_DEBUG */ /* Local functions */ static int H5Z_find_idx(H5Z_filter_t id); static int H5Z__check_unregister_dset_cb(void *obj_ptr, hid_t obj_id, void *key); static int H5Z__check_unregister_group_cb(void *obj_ptr, hid_t obj_id, void *key); static int H5Z__flush_file_cb(void *obj_ptr, hid_t obj_id, void *key); /*------------------------------------------------------------------------- * Function: H5Z__init_package * * Purpose: Initializes the data filter layer. * * Return: Non-negative on success/Negative on failure *------------------------------------------------------------------------- */ herr_t H5Z__init_package(void) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_PACKAGE /* Internal filters */ if (H5Z_register(H5Z_SHUFFLE) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register shuffle filter") if (H5Z_register(H5Z_FLETCHER32) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register fletcher32 filter") if (H5Z_register(H5Z_NBIT) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register nbit filter") if (H5Z_register(H5Z_SCALEOFFSET) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register scaleoffset filter") /* External filters */ #ifdef H5_HAVE_FILTER_DEFLATE if (H5Z_register(H5Z_DEFLATE) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register deflate filter") #endif /* H5_HAVE_FILTER_DEFLATE */ #ifdef H5_HAVE_FILTER_SZIP H5Z_SZIP->encoder_present = SZ_encoder_enabled(); if (H5Z_register(H5Z_SZIP) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register szip filter") #endif /* H5_HAVE_FILTER_SZIP */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z__init_package() */ /*------------------------------------------------------------------------- * Function: H5Z_term_package * * Purpose: Terminate the H5Z layer. * * Return: void *------------------------------------------------------------------------- */ int H5Z_term_package(void) { int n = 0; FUNC_ENTER_NOAPI_NOINIT_NOERR if(H5_PKG_INIT_VAR) { #ifdef H5Z_DEBUG char comment[16], bandwidth[32]; int dir, nprint = 0; size_t i; if(H5DEBUG(Z)) { for(i = 0; i < H5Z_table_used_g; i++) { for(dir = 0; dir<2; dir++) { if(0 == H5Z_stat_table_g[i].stats[dir].total) continue; if(0 == nprint++) { /* Print column headers */ HDfprintf(H5DEBUG(Z), "H5Z: filter statistics " "accumulated over life of library:\n"); HDfprintf(H5DEBUG(Z), " %-16s %10s %10s %8s %8s %8s %10s\n", "Filter", "Total", "Errors", "User", "System", "Elapsed", "Bandwidth"); HDfprintf(H5DEBUG(Z), " %-16s %10s %10s %8s %8s %8s %10s\n", "------", "-----", "------", "----", "------", "-------", "---------"); } /* end if */ /* Truncate the comment to fit in the field */ HDstrncpy(comment, H5Z_table_g[i].name, sizeof comment); comment[sizeof(comment) - 1] = '\0'; /* * Format bandwidth to have four significant digits and * units of `B/s', `kB/s', `MB/s', `GB/s', or `TB/s' or * the word `Inf' if the elapsed time is zero. */ H5_bandwidth(bandwidth, (double)(H5Z_stat_table_g[i].stats[dir].total), H5Z_stat_table_g[i].stats[dir].timer.etime); /* Print the statistics */ HDfprintf(H5DEBUG(Z), " %s%-15s %10Hd %10Hd %8.2f %8.2f %8.2f " "%10s\n", dir?"<":">", comment, H5Z_stat_table_g[i].stats[dir].total, H5Z_stat_table_g[i].stats[dir].errors, H5Z_stat_table_g[i].stats[dir].timer.utime, H5Z_stat_table_g[i].stats[dir].timer.stime, H5Z_stat_table_g[i].stats[dir].timer.etime, bandwidth); } /* end for */ } /* end for */ } /* end if */ #endif /* H5Z_DEBUG */ /* Free the table of filters */ if (H5Z_table_g) { H5Z_table_g = (H5Z_class2_t *)H5MM_xfree(H5Z_table_g); #ifdef H5Z_DEBUG H5Z_stat_table_g = (H5Z_stats_t *)H5MM_xfree(H5Z_stat_table_g); #endif /* H5Z_DEBUG */ H5Z_table_used_g = H5Z_table_alloc_g = 0; n++; } /* end if */ /* Mark interface as closed */ if (0 == n) H5_PKG_INIT_VAR = FALSE; } /* end if */ FUNC_LEAVE_NOAPI(n) } /* end H5Z_term_package() */ /*------------------------------------------------------------------------- * Function: H5Zregister * * Purpose: This function registers new filter. * * Return: Non-negative on success/Negative on failure *------------------------------------------------------------------------- */ herr_t H5Zregister(const void *cls) { const H5Z_class2_t *cls_real = (const H5Z_class2_t *) cls; /* "Real" class pointer */ H5Z_class2_t cls_new; /* Translated class struct */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE1("e", "*x", cls); /* Check args */ if (cls_real==NULL) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter class") /* Check H5Z_class_t version number; this is where a function to convert * from an outdated version should be called. * * If the version number is invalid, we assume that the target of cls is the * old style "H5Z_class1_t" structure, which did not contain a version * field. In this structure, the first field is the id. Since both version * and id are integers they will have the same value, and since id must be * at least 256, there should be no overlap and the version of the struct * can be determined by the value of the first field. */ if (cls_real->version != H5Z_CLASS_T_VERS) { #ifndef H5_NO_DEPRECATED_SYMBOLS /* Assume it is an old "H5Z_class1_t" instead */ const H5Z_class1_t *cls_old = (const H5Z_class1_t *) cls; /* Translate to new H5Z_class2_t */ cls_new.version = H5Z_CLASS_T_VERS; cls_new.id = cls_old->id; cls_new.encoder_present = 1; cls_new.decoder_present = 1; cls_new.name = cls_old->name; cls_new.can_apply = cls_old->can_apply; cls_new.set_local = cls_old->set_local; cls_new.filter = cls_old->filter; /* Set cls_real to point to the translated structure */ cls_real = &cls_new; #else /* H5_NO_DEPRECATED_SYMBOLS */ /* Deprecated symbols not allowed, throw an error */ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid H5Z_class_t version number"); #endif /* H5_NO_DEPRECATED_SYMBOLS */ } /* end if */ if (cls_real->id < 0 || cls_real->id > H5Z_FILTER_MAX) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number") if (cls_real->id < H5Z_FILTER_RESERVED) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to modify predefined filters") if (cls_real->filter == NULL) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no filter function specified") /* Do it */ if (H5Z_register(cls_real) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter") done: FUNC_LEAVE_API(ret_value) } /*------------------------------------------------------------------------- * Function: H5Z_register * * Purpose: Same as the public version except this one allows filters * to be set for predefined method numbers < H5Z_FILTER_RESERVED * * Return: Non-negative on success * Negative on failure *------------------------------------------------------------------------- */ herr_t H5Z_register (const H5Z_class2_t *cls) { size_t i; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) HDassert(cls); HDassert(cls->id >= 0 && cls->id <= H5Z_FILTER_MAX); /* Is the filter already registered? */ for (i = 0; i < H5Z_table_used_g; i++) if (H5Z_table_g[i].id == cls->id) break; /* Filter not already registered */ if (i >= H5Z_table_used_g) { if (H5Z_table_used_g >= H5Z_table_alloc_g) { size_t n = MAX(H5Z_MAX_NFILTERS, 2 * H5Z_table_alloc_g); H5Z_class2_t *table = (H5Z_class2_t *)H5MM_realloc(H5Z_table_g, n * sizeof(H5Z_class2_t)); #ifdef H5Z_DEBUG H5Z_stats_t *stat_table = (H5Z_stats_t *)H5MM_realloc(H5Z_stat_table_g, n * sizeof(H5Z_stats_t)); #endif /* H5Z_DEBUG */ if (!table) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter table") H5Z_table_g = table; #ifdef H5Z_DEBUG if (!stat_table) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter statistics table") H5Z_stat_table_g = stat_table; #endif /* H5Z_DEBUG */ H5Z_table_alloc_g = n; } /* end if */ /* Initialize */ i = H5Z_table_used_g++; HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t)); #ifdef H5Z_DEBUG HDmemset(H5Z_stat_table_g+i, 0, sizeof(H5Z_stats_t)); #endif /* H5Z_DEBUG */ } /* end if */ /* Filter already registered */ else { /* Replace old contents */ HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t)); } /* end else */ done: FUNC_LEAVE_NOAPI(ret_value) } /*------------------------------------------------------------------------- * Function: H5Zunregister * * Purpose: This function unregisters a filter. * * Return: Non-negative on success * Negative on failure *------------------------------------------------------------------------- */ herr_t H5Zunregister(H5Z_filter_t id) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE1("e", "Zf", id); /* Check args */ if (id < 0 || id > H5Z_FILTER_MAX) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number") if (id < H5Z_FILTER_RESERVED) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to modify predefined filters") /* Do it */ if (H5Z_unregister(id) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to unregister filter") done: FUNC_LEAVE_API(ret_value) } /* end H5Zunregister() */ /*------------------------------------------------------------------------- * Function: H5Z_unregister * * Purpose: Same as the public version except this one allows filters * to be unset for predefined method numbers =0 && filter_id<=H5Z_FILTER_MAX); /* Is the filter already registered? */ for (filter_index = 0; filter_index < H5Z_table_used_g; filter_index++) if (H5Z_table_g[filter_index].id == filter_id) break; /* Fail if filter not found */ if (filter_index >= H5Z_table_used_g) HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter is not registered") /* Initialize the structure object for iteration */ object.filter_id = filter_id; object.found = FALSE; /* Iterate through all opened datasets, returns a failure if any of them uses the filter */ if (H5I_iterate(H5I_DATASET, H5Z__check_unregister_dset_cb, &object, FALSE) < 0) HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed") if (object.found) HGOTO_ERROR(H5E_PLINE, H5E_CANTRELEASE, FAIL, "can't unregister filter because a dataset is still using it") /* Iterate through all opened groups, returns a failure if any of them uses the filter */ if (H5I_iterate(H5I_GROUP, H5Z__check_unregister_group_cb, &object, FALSE) < 0) HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed") if (object.found) HGOTO_ERROR(H5E_PLINE, H5E_CANTRELEASE, FAIL, "can't unregister filter because a group is still using it") /* Iterate through all opened files and flush them */ if (H5I_iterate(H5I_FILE, H5Z__flush_file_cb, NULL, FALSE) < 0) HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed") /* Remove filter from table */ /* Don't worry about shrinking table size (for now) */ HDmemmove(&H5Z_table_g[filter_index], &H5Z_table_g[filter_index+1], sizeof(H5Z_class2_t)*((H5Z_table_used_g-1)-filter_index)); #ifdef H5Z_DEBUG HDmemmove(&H5Z_stat_table_g[filter_index], &H5Z_stat_table_g[filter_index+1], sizeof(H5Z_stats_t)*((H5Z_table_used_g-1)-filter_index)); #endif /* H5Z_DEBUG */ H5Z_table_used_g--; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_unregister() */ /*------------------------------------------------------------------------- * Function: H5Z__check_unregister * * Purpose: Check if an object uses the filter to be unregistered. * * Return: TRUE if the object uses the filter. * FALSE if not, NEGATIVE on error. *------------------------------------------------------------------------- */ static htri_t H5Z__check_unregister(hid_t ocpl_id, H5Z_filter_t filter_id) { H5P_genplist_t *plist; /* Property list */ htri_t ret_value = FALSE; /* Return value */ FUNC_ENTER_STATIC /* Get the plist structure of object creation */ if (NULL == (plist = H5P_object_verify(ocpl_id, H5P_OBJECT_CREATE))) HGOTO_ERROR(H5E_PLINE, H5E_BADATOM, FAIL, "can't find object for ID") /* Check if the object creation property list uses the filter */ if ((ret_value = H5P_filter_in_pline(plist, filter_id)) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z__check_unregister() */ /*------------------------------------------------------------------------- * Function: H5Z__check_unregister_group_cb * * Purpose: The callback function for H5Z_unregister. It iterates * through all opened objects. If the object is a dataset * or a group and it uses the filter to be unregistered, the * function returns TRUE. * * Return: TRUE if the object uses the filter. * FALSE otherwise. *------------------------------------------------------------------------- */ static int H5Z__check_unregister_group_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void *key) { hid_t ocpl_id = -1; H5Z_object_t *object = (H5Z_object_t *)key; htri_t filter_in_pline = FALSE; int ret_value = FALSE; /* Return value */ FUNC_ENTER_STATIC HDassert(obj_ptr); /* Get the group creation property */ if ((ocpl_id = H5G_get_create_plist((H5G_t *)obj_ptr)) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get group creation property list") /* Check if the filter is in the group creation property list */ if ((filter_in_pline = H5Z__check_unregister(ocpl_id, object->filter_id)) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline") /* H5I_iterate expects TRUE to stop the loop over objects. Stop the loop and * let H5Z_unregister return failure. */ if (filter_in_pline) { object->found = TRUE; ret_value = TRUE; } /* end if */ done: if (ocpl_id > 0) if (H5I_dec_app_ref(ocpl_id) < 0) HDONE_ERROR(H5E_PLINE, H5E_CANTDEC, FAIL, "can't release plist") FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z__check_unregister_group_cb() */ /*------------------------------------------------------------------------- * Function: H5Z__check_unregister_dset_cb * * Purpose: The callback function for H5Z_unregister. It iterates * through all opened objects. If the object is a dataset * or a group and it uses the filter to be unregistered, the * function returns TRUE. * * Return: TRUE if the object uses the filter. * FALSE otherwise. *------------------------------------------------------------------------- */ static int H5Z__check_unregister_dset_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void *key) { hid_t ocpl_id = -1; H5Z_object_t *object = (H5Z_object_t *)key; htri_t filter_in_pline = FALSE; int ret_value = FALSE; /* Return value */ FUNC_ENTER_STATIC HDassert(obj_ptr); /* Get the dataset creation property */ if ((ocpl_id = H5D_get_create_plist((H5D_t *)obj_ptr)) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get dataset creation property list") /* Check if the filter is in the dataset creation property list */ if ((filter_in_pline = H5Z__check_unregister(ocpl_id, object->filter_id)) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline") /* H5I_iterate expects TRUE to stop the loop over objects. Stop the loop and * let H5Z_unregister return failure. */ if (filter_in_pline) { object->found = TRUE; ret_value = TRUE; } /* end if */ done: if (ocpl_id > 0) if (H5I_dec_app_ref(ocpl_id) < 0) HDONE_ERROR(H5E_PLINE, H5E_CANTDEC, FAIL, "can't release plist") FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z__check_unregister_dset_cb() */ /*------------------------------------------------------------------------- * Function: H5Z__flush_file_cb * * Purpose: The callback function for H5Z_unregister. It iterates * through all opened files and flush them. * * Return: FALSE if finishes flushing and moves on * FAIL if there is an error *------------------------------------------------------------------------- */ static int H5Z__flush_file_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void H5_ATTR_UNUSED *key) { int ret_value = FALSE; /* Return value */ FUNC_ENTER_STATIC HDassert(obj_ptr); /* Call the flush routine for mounted file hierarchies. Do a global flush * if the file is opened for write */ if (H5F_ACC_RDWR & H5F_INTENT((H5F_t *)obj_ptr)) { if (H5F_flush_mounts((H5F_t *)obj_ptr, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTFLUSH, FAIL, "unable to flush file hierarchy") } /* end if */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z__flush_file_cb() */ /*------------------------------------------------------------------------- * Function: H5Zfilter_avail * * Purpose: Check if a filter is available * * Return: Non-negative (TRUE/FALSE) on success/Negative on failure *------------------------------------------------------------------------- */ htri_t H5Zfilter_avail(H5Z_filter_t id) { htri_t ret_value = FALSE; /* Return value */ FUNC_ENTER_API(FAIL) H5TRACE1("t", "Zf", id); /* Check args */ if (id < 0 || id > H5Z_FILTER_MAX) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number") if ((ret_value = H5Z_filter_avail(id)) < 0) HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "unable to check the availability of the filter") done: FUNC_LEAVE_API(ret_value) } /* end H5Zfilter_avail() */ /*------------------------------------------------------------------------- * Function: H5Z_filter_avail * * Purpose: Private function to check if a filter is available * * Return: Non-negative (TRUE/FALSE) on success/Negative on failure *------------------------------------------------------------------------- */ htri_t H5Z_filter_avail(H5Z_filter_t id) { H5PL_key_t key; /* Key for finding a plugin */ const H5Z_class2_t *filter_info; /* Filter information */ size_t i; /* Local index variable */ htri_t ret_value = FALSE; /* Return value */ FUNC_ENTER_NOAPI(FAIL) /* Is the filter already registered? */ for (i = 0; i < H5Z_table_used_g; i++) if (H5Z_table_g[i].id == id) HGOTO_DONE(TRUE) key.id = (int)id; if (NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, key))) { if (H5Z_register(filter_info) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register loaded filter") HGOTO_DONE(TRUE) } done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_filter_avail() */ /*------------------------------------------------------------------------- * Function: H5Z_prelude_callback * * Purpose: Makes a dataset creation "prelude" callback for the "can_apply" * or "set_local" routines. * * Return: Non-negative on success/Negative on failure * * Notes: The chunk dimensions are used to create a dataspace, instead * of passing in the dataset's dataspace, since the chunk * dimensions are what the I/O filter will actually see *------------------------------------------------------------------------- */ static herr_t H5Z_prelude_callback(const H5O_pline_t *pline, hid_t dcpl_id, hid_t type_id, hid_t space_id, H5Z_prelude_type_t prelude_type) { H5Z_class2_t *fclass; /* Individual filter information */ size_t u; /* Local index variable */ htri_t ret_value = TRUE; /* Return value */ FUNC_ENTER_NOAPI_NOINIT HDassert(pline->nused > 0); /* Iterate over filters */ for (u = 0; u < pline->nused; u++) { /* Get filter information */ if (NULL == (fclass = H5Z_find(pline->filter[u].id))) { /* Ignore errors from optional filters */ if (pline->filter[u].flags & H5Z_FLAG_OPTIONAL) H5E_clear_stack (NULL); else HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "required filter was not located") } /* end if */ else { /* Make correct callback */ switch (prelude_type) { case H5Z_PRELUDE_CAN_APPLY: /* Check if filter is configured to be able to encode */ if (!fclass->encoder_present) HGOTO_ERROR(H5E_PLINE, H5E_NOENCODER, FAIL, "Filter present but encoding is disabled."); /* Check if there is a "can apply" callback */ if (fclass->can_apply) { /* Make callback to filter's "can apply" function */ htri_t status = (fclass->can_apply)(dcpl_id, type_id, space_id); /* Indicate error during filter callback */ if (status < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "error during user callback") /* Indicate filter can't apply to this combination of parameters. * If the filter is NOT optional, returns failure. */ if (status == FALSE && !(pline->filter[u].flags & H5Z_FLAG_OPTIONAL)) HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "filter parameters not appropriate") } /* end if */ break; case H5Z_PRELUDE_SET_LOCAL: /* Check if there is a "set local" callback */ if (fclass->set_local) { /* Make callback to filter's "set local" function */ if ((fclass->set_local)(dcpl_id, type_id, space_id) < 0) /* Indicate error during filter callback */ HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "error during user callback") } /* end if */ break; default: HDassert("invalid prelude type" && 0); } /* end switch */ } /* end else */ } /* end for */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_prelude_callback() */ /*------------------------------------------------------------------------- * Function: H5Z_prepare_prelude_callback_dcpl * * Purpose: Prepares to make a dataset creation "prelude" callback * for the "can_apply" or "set_local" routines. * * Return: Non-negative on success/Negative on failure * * Notes: The chunk dimensions are used to create a dataspace, instead * of passing in the dataset's dataspace, since the chunk * dimensions are what the I/O filter will actually see *------------------------------------------------------------------------- */ static herr_t H5Z_prepare_prelude_callback_dcpl(hid_t dcpl_id, hid_t type_id, H5Z_prelude_type_t prelude_type) { hid_t space_id = -1; /* ID for dataspace describing chunk */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT HDassert(H5I_GENPROP_LST == H5I_get_type(dcpl_id)); HDassert(H5I_DATATYPE == H5I_get_type(type_id)); /* Check if the property list is non-default */ if (dcpl_id != H5P_DATASET_CREATE_DEFAULT) { H5P_genplist_t *dc_plist; /* Dataset creation property list object */ H5O_layout_t dcpl_layout; /* Dataset's layout information */ /* Get dataset creation property list object */ if (NULL == (dc_plist = (H5P_genplist_t *)H5I_object(dcpl_id))) HGOTO_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "can't get dataset creation property list") /* Peek at the layout information */ if (H5P_peek(dc_plist, H5D_CRT_LAYOUT_NAME, &dcpl_layout) < 0) HGOTO_ERROR (H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve layout") /* Check if the dataset is chunked */ if (H5D_CHUNKED == dcpl_layout.type) { H5O_pline_t dcpl_pline; /* Object's I/O pipeline information */ /* Get I/O pipeline information */ if (H5P_peek(dc_plist, H5O_CRT_PIPELINE_NAME, &dcpl_pline) < 0) HGOTO_ERROR (H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve pipeline filter") /* Check if the chunks have filters */ if (dcpl_pline.nused > 0) { hsize_t chunk_dims[H5O_LAYOUT_NDIMS]; /* Size of chunk dimensions */ H5S_t *space; /* Dataspace describing chunk */ size_t u; /* Local index variable */ /* Create a dataspace for a chunk & set the extent */ for (u = 0; u < dcpl_layout.u.chunk.ndims; u++) chunk_dims[u] = dcpl_layout.u.chunk.dim[u]; if (NULL == (space = H5S_create_simple(dcpl_layout.u.chunk.ndims, chunk_dims, NULL))) HGOTO_ERROR (H5E_DATASPACE, H5E_CANTCREATE, FAIL, "can't create simple dataspace") /* Get ID for dataspace to pass to filter routines */ if ((space_id = H5I_register(H5I_DATASPACE, space, FALSE)) < 0) { (void)H5S_close (space); HGOTO_ERROR (H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace ID") } /* end if */ /* Make the callbacks */ if (H5Z_prelude_callback(&dcpl_pline, dcpl_id, type_id, space_id, prelude_type) < 0) HGOTO_ERROR (H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter") } /* end if */ } /* end if */ } /* end if */ done: if (space_id > 0 && H5I_dec_ref(space_id) < 0) HDONE_ERROR(H5E_PLINE, H5E_CANTRELEASE, FAIL, "unable to close dataspace") FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_prepare_prelude_callback_dcpl() */ /*------------------------------------------------------------------------- * Function: H5Z_can_apply * * Purpose: Checks if all the filters defined in the dataset creation * property list can be applied to a particular combination of * datatype and dataspace for a dataset. * * Return: Non-negative on success * Negative on failure * * Notes: The chunk dimensions are used to create a dataspace, instead * of passing in the dataset's dataspace, since the chunk * dimensions are what the I/O filter will actually see *------------------------------------------------------------------------- */ herr_t H5Z_can_apply(hid_t dcpl_id, hid_t type_id) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) /* Make "can apply" callbacks for filters in pipeline */ if (H5Z_prepare_prelude_callback_dcpl(dcpl_id, type_id, H5Z_PRELUDE_CAN_APPLY) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_can_apply() */ /*------------------------------------------------------------------------- * Function: H5Z_set_local * * Purpose: Makes callbacks to modify dataset creation list property * settings for filters on a new dataset, based on the datatype * and dataspace of that dataset (chunk). * * Return: Non-negative on success * Negative on failure * * Notes: The chunk dimensions are used to create a dataspace, instead * of passing in the dataset's dataspace, since the chunk * dimensions are what the I/O filter will actually see *------------------------------------------------------------------------- */ herr_t H5Z_set_local(hid_t dcpl_id, hid_t type_id) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) /* Make "set local" callbacks for filters in pipeline */ if (H5Z_prepare_prelude_callback_dcpl(dcpl_id, type_id, H5Z_PRELUDE_SET_LOCAL) < 0) HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "local filter parameters not set") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_set_local() */ /*------------------------------------------------------------------------- * Function: H5Z_can_apply_direct * * Purpose: Checks if all the filters defined in the pipeline can be * applied to an opaque byte stream (currently only a group). * The pipeline is assumed to have at least one filter. * * Return: Non-negative on success * Negative on failure *------------------------------------------------------------------------- */ herr_t H5Z_can_apply_direct(const H5O_pline_t *pline) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) HDassert(pline->nused > 0); /* Make "can apply" callbacks for filters in pipeline */ if (H5Z_prelude_callback(pline, (hid_t)-1, (hid_t)-1, (hid_t)-1, H5Z_PRELUDE_CAN_APPLY) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_can_apply_direct() */ /*------------------------------------------------------------------------- * Function: H5Z_set_local_direct * * Purpose: Makes callbacks to modify local settings for filters on a * new opaque object. The pipeline is assumed to have at * least one filter. * * Return: Non-negative on success * Negative on failure * * Notes: This callback will almost certainly not do anything * useful, other than to make certain that the filter will * accept opaque data. *------------------------------------------------------------------------- */ herr_t H5Z_set_local_direct(const H5O_pline_t *pline) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) HDassert(pline->nused > 0); /* Make "set local" callbacks for filters in pipeline */ if (H5Z_prelude_callback(pline, (hid_t)-1, (hid_t)-1, (hid_t)-1, H5Z_PRELUDE_SET_LOCAL) < 0) HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "local filter parameters not set") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_set_local_direct() */ /*------------------------------------------------------------------------- * Function: H5Z_modify * * Purpose: Modify filter parameters for specified pipeline. * * Return: Non-negative on success * Negative on failure *------------------------------------------------------------------------- */ herr_t H5Z_modify(const H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags, size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/]) { size_t idx; /* Index of filter in pipeline */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) HDassert(pline); HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX); HDassert(0 == (flags & ~((unsigned)H5Z_FLAG_DEFMASK))); HDassert(0 == cd_nelmts || cd_values); /* Locate the filter in the pipeline */ for (idx = 0; idx < pline->nused; idx++) if (pline->filter[idx].id == filter) break; /* Check if the filter was not already in the pipeline */ if (idx > pline->nused) HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline") /* Change parameters for filter */ pline->filter[idx].flags = flags; pline->filter[idx].cd_nelmts = cd_nelmts; /* Free any existing parameters */ if (pline->filter[idx].cd_values != NULL && pline->filter[idx].cd_values != pline->filter[idx]._cd_values) H5MM_xfree(pline->filter[idx].cd_values); /* Set parameters */ if (cd_nelmts > 0) { size_t i; /* Local index variable */ /* Allocate memory or point at internal buffer */ if (cd_nelmts > H5Z_COMMON_CD_VALUES) { pline->filter[idx].cd_values = (unsigned *)H5MM_malloc(cd_nelmts * sizeof(unsigned)); if (NULL == pline->filter[idx].cd_values) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter parameters") } /* end if */ else pline->filter[idx].cd_values = pline->filter[idx]._cd_values; /* Copy client data values */ for (i = 0; i < cd_nelmts; i++) pline->filter[idx].cd_values[i] = cd_values[i]; } /* end if */ else pline->filter[idx].cd_values = NULL; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_modify() */ /*------------------------------------------------------------------------- * Function: H5Z_append * * Purpose: Append another filter to the specified pipeline. * * Return: Non-negative on success * Negative on failure *------------------------------------------------------------------------- */ herr_t H5Z_append(H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags, size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/]) { size_t idx; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) HDassert(pline); HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX); HDassert(0 == (flags & ~((unsigned)H5Z_FLAG_DEFMASK))); HDassert(0 == cd_nelmts || cd_values); /* * Check filter limit. We do it here for early warnings although we may * decide to relax this restriction in the future. */ if (pline->nused >= H5Z_MAX_NFILTERS) HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "too many filters in pipeline") /* Check for freshly allocated filter pipeline */ if (pline->version == 0) pline->version = H5O_PLINE_VERSION_1; /* Allocate additional space in the pipeline if it's full */ if (pline->nused >= pline->nalloc) { H5O_pline_t x; size_t n; /* Each filter's data may be stored internally or may be * a separate block of memory. * For each filter, if cd_values points to the internal array * _cd_values, the pointer will need to be updated when the * filter struct is reallocated. Set these pointers to ~NULL * so that we can reset them after reallocating the filters array. */ for (n = 0; n < pline->nalloc; ++n) if (pline->filter[n].cd_values == pline->filter[n]._cd_values) pline->filter[n].cd_values = (unsigned *)((void *) ~((size_t)NULL)); x.nalloc = MAX(H5Z_MAX_NFILTERS, 2 * pline->nalloc); x.filter = (H5Z_filter_info_t *)H5MM_realloc(pline->filter, x.nalloc * sizeof(x.filter[0])); if (NULL == x.filter) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter pipeline") /* Fix pointers in previous filters that need to point to their own * internal data. */ for (n = 0; n < pline->nalloc; ++n) if (x.filter[n].cd_values == (void *) ~((size_t) NULL)) x.filter[n].cd_values = x.filter[n]._cd_values; /* Point to newly allocated buffer */ pline->nalloc = x.nalloc; pline->filter = x.filter; } /* end if */ /* Add the new filter to the pipeline */ idx = pline->nused; pline->filter[idx].id = filter; pline->filter[idx].flags = flags; pline->filter[idx].name = NULL; /*we'll pick it up later*/ pline->filter[idx].cd_nelmts = cd_nelmts; if (cd_nelmts > 0) { size_t i; /* Local index variable */ /* Allocate memory or point at internal buffer */ if (cd_nelmts > H5Z_COMMON_CD_VALUES) { pline->filter[idx].cd_values = (unsigned *)H5MM_malloc(cd_nelmts * sizeof(unsigned)); if (NULL == pline->filter[idx].cd_values) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter") } /* end if */ else pline->filter[idx].cd_values = pline->filter[idx]._cd_values; /* Copy client data values */ for (i = 0; i < cd_nelmts; i++) pline->filter[idx].cd_values[i] = cd_values[i]; } /* end if */ else pline->filter[idx].cd_values = NULL; pline->nused++; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_append() */ /*------------------------------------------------------------------------- * Function: H5Z_find_idx * * Purpose: Given a filter ID return the offset in the global array * that holds all the registered filters. * * Return: Success: Non-negative index of entry in global filter table. * Failure: Negative *------------------------------------------------------------------------- */ static int H5Z_find_idx(H5Z_filter_t id) { size_t i; /* Local index variable */ int ret_value = FAIL; /* Return value */ FUNC_ENTER_NOAPI_NOINIT_NOERR for (i = 0; i < H5Z_table_used_g; i++) if (H5Z_table_g[i].id == id) HGOTO_DONE((int)i) done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_find_idx() */ /*------------------------------------------------------------------------- * Function: H5Z_find * * Purpose: Given a filter ID return a pointer to a global struct that * defines the filter. * * Return: Success: Ptr to entry in global filter table. * Failure: NULL *------------------------------------------------------------------------- */ H5Z_class2_t * H5Z_find(H5Z_filter_t id) { int idx; /* Filter index in global table */ H5Z_class2_t *ret_value = NULL; /* Return value */ FUNC_ENTER_NOAPI(NULL) /* Get the index in the global table */ if ((idx = H5Z_find_idx(id)) < 0) HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "required filter %d is not registered", id) /* Set return value */ ret_value = H5Z_table_g + idx; done: FUNC_LEAVE_NOAPI(ret_value) } /* H5Z_find() */ /*------------------------------------------------------------------------- * Function: H5Z_pipeline * * Purpose: Process data through the filter pipeline. The FLAGS argument * is the filter invocation flags (definition flags come from * the PLINE->filter[].flags). The filters are processed in * definition order unless the H5Z_FLAG_REVERSE is set. The * FILTER_MASK is a bit-mask to indicate which filters to skip * and on exit will indicate which filters failed. Each * filter has an index number in the pipeline and that index * number is the filter's bit in the FILTER_MASK. NBYTES is the * number of bytes of data to filter and on exit should be the * number of resulting bytes while BUF_SIZE holds the total * allocated size of the buffer, which is pointed to BUF. * * If the buffer must grow during processing of the pipeline * then the pipeline function should free the original buffer * and return a fresh buffer, adjusting BUF_SIZE accordingly. * * Return: Non-negative on success * Negative on failure *------------------------------------------------------------------------- */ herr_t H5Z_pipeline(const H5O_pline_t *pline, unsigned flags, unsigned *filter_mask/*in,out*/, H5Z_EDC_t edc_read, H5Z_cb_t cb_struct, size_t *nbytes/*in,out*/, size_t *buf_size/*in,out*/, void **buf/*in,out*/) { size_t i, idx, new_nbytes; int fclass_idx; /* Index of filter class in global table */ H5Z_class2_t *fclass=NULL; /* Filter class pointer */ #ifdef H5Z_DEBUG H5Z_stats_t *fstats=NULL; /* Filter stats pointer */ H5_timer_t timer; #endif unsigned failed = 0; unsigned tmp_flags; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) HDassert(0 == (flags & ~((unsigned)H5Z_FLAG_INVMASK))); HDassert(filter_mask); HDassert(nbytes && *nbytes>0); HDassert(buf_size && *buf_size>0); HDassert(buf && *buf); HDassert(!pline || pline->nused < H5Z_MAX_NFILTERS); if (pline && (flags & H5Z_FLAG_REVERSE)) { /* Read */ for (i = pline->nused; i > 0; --i) { idx = i-1; if (*filter_mask & ((unsigned)1 << idx)) { failed |= (unsigned)1 << idx; continue; /* filter excluded */ } /* If the filter isn't registered and the application doesn't * indicate no plugin through HDF5_PRELOAD_PLUG (using the symbol "::"), * try to load it dynamically and register it. Otherwise, return failure */ if ((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0) { hbool_t issue_error = FALSE; H5PL_key_t key; const H5Z_class2_t *filter_info; /* Try loading the filter */ key.id = (int)(pline->filter[idx].id); if(NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, key))) { /* Register the filter we loaded */ if(H5Z_register(filter_info) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter") /* Search in the table of registered filters again to find the dynamic filter just loaded and registered */ if ((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0) issue_error = TRUE; } else issue_error = TRUE; /* Check for error */ if (issue_error) { /* Print out the filter name to give more info. But the name is optional for * the filter */ if (pline->filter[idx].name) HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "required filter '%s' is not registered", pline->filter[idx].name) else HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "required filter (name unavailable) is not registered") } } /* end if */ fclass = &H5Z_table_g[fclass_idx]; #ifdef H5Z_DEBUG fstats = &H5Z_stat_table_g[fclass_idx]; H5_timer_begin (&timer); #endif tmp_flags = flags | (pline->filter[idx].flags); tmp_flags |= (edc_read== H5Z_DISABLE_EDC) ? H5Z_FLAG_SKIP_EDC : 0; new_nbytes = (fclass->filter)(tmp_flags, pline->filter[idx].cd_nelmts, pline->filter[idx].cd_values, *nbytes, buf_size, buf); #ifdef H5Z_DEBUG H5_timer_end (&(fstats->stats[1].timer), &timer); fstats->stats[1].total += MAX(*nbytes, new_nbytes); if (0 == new_nbytes) fstats->stats[1].errors += *nbytes; #endif if (0 == new_nbytes) { if ((cb_struct.func && (H5Z_CB_FAIL == cb_struct.func(pline->filter[idx].id, *buf, *buf_size, cb_struct.op_data))) || !cb_struct.func) HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "filter returned failure during read") *nbytes = *buf_size; failed |= (unsigned)1 << idx; H5E_clear_stack (NULL); } else *nbytes = new_nbytes; } } else if (pline) { /* Write */ for (idx = 0; idx < pline->nused; idx++) { if (*filter_mask & ((unsigned)1 << idx)) { failed |= (unsigned)1 << idx; continue; /*filter excluded*/ } if ((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0) { /* Check if filter is optional -- If it isn't, then error */ if ((pline->filter[idx].flags & H5Z_FLAG_OPTIONAL) == 0) HGOTO_ERROR(H5E_PLINE, H5E_WRITEERROR, FAIL, "required filter is not registered") failed |= (unsigned)1 << idx; H5E_clear_stack (NULL); continue; /*filter excluded*/ } fclass = &H5Z_table_g[fclass_idx]; #ifdef H5Z_DEBUG fstats = &H5Z_stat_table_g[fclass_idx]; H5_timer_begin (&timer); #endif new_nbytes = (fclass->filter)(flags | (pline->filter[idx].flags), pline->filter[idx].cd_nelmts, pline->filter[idx].cd_values, *nbytes, buf_size, buf); #ifdef H5Z_DEBUG H5_timer_end (&(fstats->stats[0].timer), &timer); fstats->stats[0].total += MAX(*nbytes, new_nbytes); if (0 == new_nbytes) fstats->stats[0].errors += *nbytes; #endif if (0 == new_nbytes) { if (0 == (pline->filter[idx].flags & H5Z_FLAG_OPTIONAL)) { if ((cb_struct.func && (H5Z_CB_FAIL == cb_struct.func (pline->filter[idx].id, *buf, *nbytes, cb_struct.op_data))) || !cb_struct.func) HGOTO_ERROR(H5E_PLINE, H5E_WRITEERROR, FAIL, "filter returned failure") *nbytes = *buf_size; } failed |= (unsigned)1 << idx; H5E_clear_stack (NULL); } else *nbytes = new_nbytes; } } *filter_mask = failed; done: FUNC_LEAVE_NOAPI(ret_value) } /*------------------------------------------------------------------------- * Function: H5Z_filter_info * * Purpose: Get pointer to filter info for pipeline * * Return: Non-negative on success * Negative on failure *------------------------------------------------------------------------- */ H5Z_filter_info_t * H5Z_filter_info(const H5O_pline_t *pline, H5Z_filter_t filter) { size_t idx; /* Index of filter in pipeline */ H5Z_filter_info_t *ret_value = NULL; /* Return value */ FUNC_ENTER_NOAPI(NULL) HDassert(pline); HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX); /* Locate the filter in the pipeline */ for (idx = 0; idx < pline->nused; idx++) if (pline->filter[idx].id == filter) break; /* Check if the filter was not already in the pipeline */ if (idx >= pline->nused) HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "filter not in pipeline") /* Set return value */ ret_value = &pline->filter[idx]; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_filter_info() */ /*------------------------------------------------------------------------- * Function: H5Z_filter_in_pline * * Purpose: Check wheter a filter is in the filter pipeline using the * filter ID. This function is very similar to H5Z_filter_info * * Return: TRUE - found filter * FALSE - not found * FAIL - error *------------------------------------------------------------------------- */ htri_t H5Z_filter_in_pline(const H5O_pline_t *pline, H5Z_filter_t filter) { size_t idx; /* Index of filter in pipeline */ htri_t ret_value = TRUE; /* Return value */ FUNC_ENTER_NOAPI(FAIL) HDassert(pline); HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX); /* Locate the filter in the pipeline */ for (idx = 0; idx < pline->nused; idx++) if (pline->filter[idx].id == filter) break; /* Check if the filter was not already in the pipeline */ if (idx >= pline->nused) ret_value = FALSE; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_filter_in_pline() */ /*------------------------------------------------------------------------- * Function: H5Z_all_filters_avail * * Purpose: Verify that all the filters in a pipeline are currently * available (i.e. registered) * * Return: Non-negative (TRUE/FALSE) on success * Negative on failure *------------------------------------------------------------------------- */ htri_t H5Z_all_filters_avail(const H5O_pline_t *pline) { size_t i, j; /* Local index variable */ htri_t ret_value = TRUE; /* Return value */ FUNC_ENTER_NOAPI(FAIL) /* Check args */ HDassert(pline); /* Iterate through all the filters in pipeline */ for (i = 0; i < pline->nused; i++) { /* Look for each filter in the list of registered filters */ for (j = 0; j < H5Z_table_used_g; j++) if (H5Z_table_g[j].id == pline->filter[i].id) break; /* Check if we didn't find the filter */ if (j == H5Z_table_used_g) HGOTO_DONE(FALSE) } /* end for */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_all_filters_avail() */ /*------------------------------------------------------------------------- * Function: H5Z_delete * * Purpose: Delete filter FILTER from pipeline PLINE; * deletes all filters if FILTER is H5Z_FILTER_NONE * * Return: Non-negative on success * Negative on failure *------------------------------------------------------------------------- */ herr_t H5Z_delete(H5O_pline_t *pline, H5Z_filter_t filter) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) /* Check args */ HDassert(pline); HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX); /* if the pipeline has no filters, just return */ if (pline->nused == 0) HGOTO_DONE (SUCCEED) /* Delete all filters */ if (H5Z_FILTER_ALL == filter) { if (H5O_msg_reset(H5O_PLINE_ID, pline) < 0) HGOTO_ERROR(H5E_PLINE, H5E_CANTFREE, FAIL, "can't release pipeline info") } /* Delete filter */ else { size_t idx; /* Index of filter in pipeline */ hbool_t found = FALSE; /* Indicate filter was found in pipeline */ /* Locate the filter in the pipeline */ for (idx = 0; idx < pline->nused; idx++) if (pline->filter[idx].id == filter) { found = TRUE; break; } /* filter was not found in the pipeline */ if (!found) HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline") /* Free information for deleted filter */ if (pline->filter[idx].name && pline->filter[idx].name != pline->filter[idx]._name) HDassert((HDstrlen(pline->filter[idx].name) + 1) > H5Z_COMMON_NAME_LEN); if (pline->filter[idx].name != pline->filter[idx]._name) pline->filter[idx].name = (char *)H5MM_xfree(pline->filter[idx].name); if (pline->filter[idx].cd_values && pline->filter[idx].cd_values != pline->filter[idx]._cd_values) HDassert(pline->filter[idx].cd_nelmts > H5Z_COMMON_CD_VALUES); if (pline->filter[idx].cd_values != pline->filter[idx]._cd_values) pline->filter[idx].cd_values = (unsigned *)H5MM_xfree(pline->filter[idx].cd_values); /* Remove filter from pipeline array */ if ((idx + 1) < pline->nused) { /* Copy filters down & fix up any client data value arrays using internal storage */ for (; (idx + 1) < pline->nused; idx++) { pline->filter[idx] = pline->filter[idx + 1]; if (pline->filter[idx].name && (HDstrlen(pline->filter[idx].name) + 1) <= H5Z_COMMON_NAME_LEN) pline->filter[idx].name = pline->filter[idx]._name; if (pline->filter[idx].cd_nelmts <= H5Z_COMMON_CD_VALUES) pline->filter[idx].cd_values = pline->filter[idx]._cd_values; } } /* Decrement number of used filters */ pline->nused--; /* Reset information for previous last filter in pipeline */ HDmemset (&pline->filter[pline->nused], 0, sizeof(H5Z_filter_info_t)); } /* end else */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_delete() */ /*------------------------------------------------------------------------- * Function: H5Zget_filter_info * * Purpose: Gets information about a pipeline data filter and stores it * in filter_config_flags. * * Return: zero on success * negative on failure *------------------------------------------------------------------------- */ herr_t H5Zget_filter_info(H5Z_filter_t filter, unsigned int *filter_config_flags) { herr_t ret_value = SUCCEED; FUNC_ENTER_API(FAIL) H5TRACE2("e", "Zf*Iu", filter, filter_config_flags); /* Get the filter info */ if (H5Z_get_filter_info(filter, filter_config_flags) < 0) HGOTO_ERROR (H5E_PLINE, H5E_CANTGET, FAIL, "Filter info not retrieved") done: FUNC_LEAVE_API(ret_value) } /* end H5Zget_filter_info() */ /*------------------------------------------------------------------------- * Function: H5Z_get_filter_info * * Purpose: Gets information about a pipeline data filter and stores it * in filter_config_flags. * * Return: zero on success * negative on failure *------------------------------------------------------------------------- */ herr_t H5Z_get_filter_info(H5Z_filter_t filter, unsigned int *filter_config_flags) { H5Z_class2_t *fclass; herr_t ret_value = SUCCEED; FUNC_ENTER_NOAPI(FAIL) /* Look up the filter class info */ if (NULL == (fclass = H5Z_find(filter))) HGOTO_ERROR(H5E_PLINE, H5E_BADVALUE, FAIL, "Filter not defined") /* Set the filter config flags for the application */ if (filter_config_flags != NULL) { *filter_config_flags = 0; if (fclass->encoder_present) *filter_config_flags |= H5Z_FILTER_CONFIG_ENCODE_ENABLED; if (fclass->decoder_present) *filter_config_flags |= H5Z_FILTER_CONFIG_DECODE_ENABLED; } /* end if */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5Z_get_filter_info() */