diff options
Diffstat (limited to 'src/H5Spoint.c')
| -rw-r--r-- | src/H5Spoint.c | 902 |
1 files changed, 632 insertions, 270 deletions
diff --git a/src/H5Spoint.c b/src/H5Spoint.c index 89ce86a..ac45613 100644 --- a/src/H5Spoint.c +++ b/src/H5Spoint.c @@ -46,14 +46,22 @@ /* Local Typedefs */ /******************/ +/* Define alias for hsize_t, for allocating H5S_pnt_node_t + point objects */ +/* (Makes it easier to understand the alloc / free calls) */ +typedef hsize_t hcoords_t; + /********************/ /* Local Prototypes */ /********************/ +static herr_t H5S__point_add(H5S_t *space, H5S_seloper_t op, size_t num_elem, + const hsize_t *coord); +static H5S_pnt_list_t *H5S__copy_pnt_list(const H5S_pnt_list_t *src, + unsigned rank); +static void H5S__free_pnt_list(H5S_pnt_list_t *pnt_lst); + +/* Selection callbacks */ static herr_t H5S__point_copy(H5S_t *dst, const H5S_t *src, hbool_t share_selection); -static herr_t H5S__point_get_seq_list(const H5S_t *space, unsigned flags, - H5S_sel_iter_t *iter, size_t maxseq, size_t maxbytes, - size_t *nseq, size_t *nbytes, hsize_t *off, size_t *len); static herr_t H5S__point_release(H5S_t *space); static htri_t H5S__point_is_valid(const H5S_t *space); static hssize_t H5S__point_serial_size(const H5S_t *space); @@ -65,7 +73,10 @@ static int H5S__point_unlim_dim(const H5S_t *space); static htri_t H5S__point_is_contiguous(const H5S_t *space); static htri_t H5S__point_is_single(const H5S_t *space); static htri_t H5S__point_is_regular(const H5S_t *space); +static htri_t H5S__point_shape_same(const H5S_t *space1, const H5S_t *space2); +static htri_t H5S__point_intersect_block(const H5S_t *space, const hsize_t *start, const hsize_t *end); static herr_t H5S__point_adjust_u(H5S_t *space, const hsize_t *offset); +static herr_t H5S__point_adjust_s(H5S_t *space, const hssize_t *offset); static herr_t H5S__point_project_scalar(const H5S_t *space, hsize_t *offset); static herr_t H5S__point_project_simple(const H5S_t *space, H5S_t *new_space, hsize_t *offset); static herr_t H5S__point_iter_init(const H5S_t *space, H5S_sel_iter_t *iter); @@ -78,15 +89,26 @@ static hsize_t H5S__point_iter_nelmts(const H5S_sel_iter_t *iter); static htri_t H5S__point_iter_has_next_block(const H5S_sel_iter_t *iter); static herr_t H5S__point_iter_next(H5S_sel_iter_t *sel_iter, size_t nelem); static herr_t H5S__point_iter_next_block(H5S_sel_iter_t *sel_iter); +static herr_t H5S__point_iter_get_seq_list(H5S_sel_iter_t *iter, size_t maxseq, + size_t maxbytes, size_t *nseq, size_t *nbytes, hsize_t *off, size_t *len); static herr_t H5S__point_iter_release(H5S_sel_iter_t *sel_iter); + +/*****************************/ +/* Library Private Variables */ +/*****************************/ + + +/*********************/ +/* Package Variables */ +/*********************/ + /* Selection properties for point selections */ const H5S_select_class_t H5S_sel_point[1] = {{ H5S_SEL_POINTS, /* Methods on selection */ H5S__point_copy, - H5S__point_get_seq_list, H5S__point_release, H5S__point_is_valid, H5S__point_serial_size, @@ -99,12 +121,19 @@ const H5S_select_class_t H5S_sel_point[1] = {{ H5S__point_is_contiguous, H5S__point_is_single, H5S__point_is_regular, + H5S__point_shape_same, + H5S__point_intersect_block, H5S__point_adjust_u, + H5S__point_adjust_s, H5S__point_project_scalar, H5S__point_project_simple, H5S__point_iter_init, }}; +/*******************/ +/* Local Variables */ +/*******************/ + /* Iteration properties for point selections */ static const H5S_sel_iter_class_t H5S_sel_iter_point[1] = {{ H5S_SEL_POINTS, @@ -116,11 +145,12 @@ static const H5S_sel_iter_class_t H5S_sel_iter_point[1] = {{ H5S__point_iter_has_next_block, H5S__point_iter_next, H5S__point_iter_next_block, + H5S__point_iter_get_seq_list, H5S__point_iter_release, }}; -/* Declare a free list to manage the H5S_pnt_node_t struct */ -H5FL_DEFINE_STATIC(H5S_pnt_node_t); +/* Declare a free list to manage the H5S_pnt_node_t + hcoords_t array struct */ +H5FL_BARR_DEFINE_STATIC(H5S_pnt_node_t, hcoords_t, H5S_MAX_RANK); /* Declare a free list to manage the H5S_pnt_list_t struct */ H5FL_DEFINE_STATIC(H5S_pnt_list_t); @@ -141,22 +171,41 @@ H5FL_DEFINE_STATIC(H5S_pnt_list_t); static herr_t H5S__point_iter_init(const H5S_t *space, H5S_sel_iter_t *iter) { - FUNC_ENTER_STATIC_NOERR + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_STATIC /* Check args */ HDassert(space && H5S_SEL_POINTS == H5S_GET_SELECT_TYPE(space)); HDassert(iter); - /* Initialize the number of points to iterate over */ - iter->elmt_left = space->select.num_elem; + /* If this iterator is created from an API call, by default we clone the + * selection now, as the dataspace could be modified or go out of scope. + * + * However, if the H5S_SEL_ITER_SHARE_WITH_DATASPACE flag is given, + * the selection is shared between the selection iterator and the + * dataspace. In this case, the application _must_not_ modify or + * close the dataspace that the iterator is operating on, or undefined + * behavior will occur. + */ + if((iter->flags & H5S_SEL_ITER_API_CALL) && + !(iter->flags & H5S_SEL_ITER_SHARE_WITH_DATASPACE)) { + /* Copy the point list */ + if(NULL == (iter->u.pnt.pnt_lst = H5S__copy_pnt_list(space->select.sel_info.pnt_lst, space->extent.rank))) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOPY, FAIL, "can't copy point list") + } /* end if */ + else + /* OK to share point list for internal iterations */ + iter->u.pnt.pnt_lst = space->select.sel_info.pnt_lst; /* Start at the head of the list of points */ - iter->u.pnt.curr = space->select.sel_info.pnt_lst->head; + iter->u.pnt.curr = iter->u.pnt.pnt_lst->head; /* Initialize type of selection iterator */ iter->type = H5S_sel_iter_point; - FUNC_LEAVE_NOAPI(SUCCEED) +done: + FUNC_LEAVE_NOAPI(ret_value) } /* end H5S__point_iter_init() */ @@ -351,6 +400,137 @@ H5S__point_iter_next_block(H5S_sel_iter_t *iter) /*-------------------------------------------------------------------------- NAME + H5S__point_iter_get_seq_list + PURPOSE + Create a list of offsets & lengths for a selection + USAGE + herr_t H5S__point_iter_get_seq_list(iter,maxseq,maxelem,nseq,nelem,off,len) + H5S_sel_iter_t *iter; IN/OUT: Selection iterator describing last + position of interest in selection. + size_t maxseq; IN: Maximum number of sequences to generate + size_t maxelem; IN: Maximum number of elements to include in the + generated sequences + size_t *nseq; OUT: Actual number of sequences generated + size_t *nelem; OUT: Actual number of elements in sequences generated + hsize_t *off; OUT: Array of offsets (in bytes) + size_t *len; OUT: Array of lengths (in bytes) + RETURNS + Non-negative on success/Negative on failure. + DESCRIPTION + Use the selection in the dataspace to generate a list of byte offsets and + lengths for the region(s) selected. Start/Restart from the position in the + ITER parameter. The number of sequences generated is limited by the MAXSEQ + parameter and the number of sequences actually generated is stored in the + NSEQ parameter. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +static herr_t +H5S__point_iter_get_seq_list(H5S_sel_iter_t *iter, size_t maxseq, size_t maxelem, + size_t *nseq, size_t *nelem, hsize_t *off, size_t *len) +{ + size_t io_left; /* The number of bytes left in the selection */ + size_t start_io_left; /* The initial number of bytes left in the selection */ + H5S_pnt_node_t *node; /* Point node */ + unsigned ndims; /* Dimensionality of dataspace*/ + hsize_t acc; /* Coordinate accumulator */ + hsize_t loc; /* Coordinate offset */ + size_t curr_seq; /* Current sequence being operated on */ + int i; /* Local index variable */ + herr_t ret_value = SUCCEED; /* return value */ + + FUNC_ENTER_STATIC_NOERR + + /* Check args */ + HDassert(iter); + HDassert(maxseq > 0); + HDassert(maxelem > 0); + HDassert(nseq); + HDassert(nelem); + HDassert(off); + HDassert(len); + + /* Choose the minimum number of bytes to sequence through */ + H5_CHECK_OVERFLOW(iter->elmt_left, hsize_t, size_t); + start_io_left = io_left = (size_t)MIN(iter->elmt_left, maxelem); + + /* Get the dataspace's rank */ + ndims = iter->rank; + + /* Walk through the points in the selection, starting at the current */ + /* location in the iterator */ + node = iter->u.pnt.curr; + curr_seq = 0; + while(NULL != node) { + /* Compute the offset of each selected point in the buffer */ + for(i = (int)(ndims - 1), acc = iter->elmt_size, loc = 0; i >= 0; i--) { + loc += (hsize_t)((hssize_t)node->pnt[i] + iter->sel_off[i]) * acc; + acc *= iter->dims[i]; + } /* end for */ + + /* Check if this is a later point in the selection */ + if(curr_seq > 0) { + /* If a sorted sequence is requested, make certain we don't go backwards in the offset */ + if((iter->flags & H5S_SEL_ITER_GET_SEQ_LIST_SORTED) && loc < off[curr_seq - 1]) + break; + + /* Check if this point extends the previous sequence */ + /* (Unlikely, but possible) */ + if(loc == (off[curr_seq - 1] + len[curr_seq - 1])) { + /* Extend the previous sequence */ + len[curr_seq - 1] += iter->elmt_size; + } /* end if */ + else { + /* Add a new sequence */ + off[curr_seq] = loc; + len[curr_seq] = iter->elmt_size; + + /* Increment sequence count */ + curr_seq++; + } /* end else */ + } /* end if */ + else { + /* Add a new sequence */ + off[curr_seq] = loc; + len[curr_seq] = iter->elmt_size; + + /* Increment sequence count */ + curr_seq++; + } /* end else */ + + /* Decrement number of elements left to process */ + io_left--; + + /* Move the iterator */ + iter->u.pnt.curr = node->next; + iter->elmt_left--; + + /* Check if we're finished with all sequences */ + if(curr_seq == maxseq) + break; + + /* Check if we're finished with all the elements available */ + if(io_left == 0) + break; + + /* Advance to the next point */ + node = node->next; + } /* end while */ + + /* Set the number of sequences generated */ + *nseq = curr_seq; + + /* Set the number of elements used */ + *nelem = start_io_left - io_left; + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S__point_iter_get_seq_list() */ + + +/*-------------------------------------------------------------------------- + NAME H5S__point_iter_release PURPOSE Release point selection iterator information for a dataspace @@ -367,13 +547,18 @@ H5S__point_iter_next_block(H5S_sel_iter_t *iter) REVISION LOG --------------------------------------------------------------------------*/ static herr_t -H5S__point_iter_release(H5S_sel_iter_t H5_ATTR_UNUSED * iter) +H5S__point_iter_release(H5S_sel_iter_t * iter) { FUNC_ENTER_STATIC_NOERR /* Check args */ HDassert(iter); + /* If this iterator copied the point list, we must free it */ + if((iter->flags & H5S_SEL_ITER_API_CALL) && + !(iter->flags & H5S_SEL_ITER_SHARE_WITH_DATASPACE)) + H5S__free_pnt_list(iter->u.pnt.pnt_lst); + FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5S__point_iter_release() */ @@ -386,7 +571,7 @@ H5S__point_iter_release(H5S_sel_iter_t H5_ATTR_UNUSED * iter) USAGE herr_t H5S__point_add(space, num_elem, coord) H5S_t *space; IN: Dataspace of selection to modify - hsize_t num_elem; IN: Number of elements in COORD array. + size_t num_elem; IN: Number of elements in COORD array. const hsize_t *coord[]; IN: The location of each element selected RETURNS Non-negative on success/Negative on failure @@ -398,7 +583,7 @@ H5S__point_iter_release(H5S_sel_iter_t H5_ATTR_UNUSED * iter) REVISION LOG --------------------------------------------------------------------------*/ static herr_t -H5S__point_add(H5S_t *space, H5S_seloper_t op, hsize_t num_elem, const hsize_t *coord) +H5S__point_add(H5S_t *space, H5S_seloper_t op, size_t num_elem, const hsize_t *coord) { H5S_pnt_node_t *top = NULL, *curr = NULL, *new_node = NULL; /* Point selection nodes */ unsigned u; /* Counter */ @@ -413,14 +598,14 @@ H5S__point_add(H5S_t *space, H5S_seloper_t op, hsize_t num_elem, const hsize_t * HDassert(op == H5S_SELECT_SET || op == H5S_SELECT_APPEND || op == H5S_SELECT_PREPEND); for(u = 0; u < num_elem; u++) { + unsigned dim; /* Counter for dimensions */ + /* Allocate space for the new node */ - if(NULL == (new_node = H5FL_MALLOC(H5S_pnt_node_t))) + if(NULL == (new_node = (H5S_pnt_node_t *)H5FL_ARR_MALLOC(hcoords_t, space->extent.rank))) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate point node") /* Initialize fields in node */ new_node->next = NULL; - if(NULL == (new_node->pnt = (hsize_t *)H5MM_malloc(space->extent.rank * sizeof(hsize_t)))) - HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate coordinate information") /* Copy over the coordinates */ H5MM_memcpy(new_node->pnt, coord + (u * space->extent.rank), (space->extent.rank * sizeof(hsize_t))); @@ -431,6 +616,17 @@ H5S__point_add(H5S_t *space, H5S_seloper_t op, hsize_t num_elem, const hsize_t * else curr->next = new_node; curr = new_node; + + /* Update bound box */ + /* (Note: when op is H5S_SELECT_SET, the bound box has been reset + * inside H5S_select_elements, the only caller of this function. + * So the following bound box update procedure works correctly + * for the SET operation) + */ + for(dim = 0; dim < space->extent.rank; dim++) { + space->select.sel_info.pnt_lst->low_bounds[dim] = MIN(space->select.sel_info.pnt_lst->low_bounds[dim], curr->pnt[dim]); + space->select.sel_info.pnt_lst->high_bounds[dim] = MAX(space->select.sel_info.pnt_lst->high_bounds[dim], curr->pnt[dim]); + } /* end for */ } /* end for */ new_node = NULL; @@ -442,20 +638,22 @@ H5S__point_add(H5S_t *space, H5S_seloper_t op, hsize_t num_elem, const hsize_t * /* Put new list in point selection */ space->select.sel_info.pnt_lst->head = top; + + /* Change the tail pointer if tail has not been set */ + if(NULL == space->select.sel_info.pnt_lst->tail) + space->select.sel_info.pnt_lst->tail = curr; } /* end if */ else { /* op==H5S_SELECT_APPEND */ H5S_pnt_node_t *tmp_node; /* Temporary point selection node */ tmp_node = space->select.sel_info.pnt_lst->head; if(tmp_node != NULL) { - while(tmp_node->next != NULL) - tmp_node = tmp_node->next; - - /* Append new list to point selection */ - tmp_node->next = top; + HDassert(space->select.sel_info.pnt_lst->tail); + space->select.sel_info.pnt_lst->tail->next = top; } /* end if */ else space->select.sel_info.pnt_lst->head = top; + space->select.sel_info.pnt_lst->tail = curr; } /* end else */ /* Set the number of elements in the new selection */ @@ -468,13 +666,12 @@ done: if(ret_value < 0) { /* Release possibly partially initialized new node */ if(new_node) - new_node = H5FL_FREE(H5S_pnt_node_t, new_node); + new_node = (H5S_pnt_node_t *)H5FL_ARR_FREE(hcoords_t, new_node); /* Release possible linked list of nodes */ while(top) { curr = top->next; - H5MM_xfree(top->pnt); - top = H5FL_FREE(H5S_pnt_node_t, top); + top = (H5S_pnt_node_t *)H5FL_ARR_FREE(hcoords_t, top); top = curr; } /* end while */ } /* end if */ @@ -503,24 +700,16 @@ done: static herr_t H5S__point_release(H5S_t *space) { - H5S_pnt_node_t *curr, *next; /* Point selection nodes */ - FUNC_ENTER_STATIC_NOERR /* Check args */ HDassert(space); - /* Delete all the nodes from the list */ - curr = space->select.sel_info.pnt_lst->head; - while(curr != NULL) { - next = curr->next; - H5MM_xfree(curr->pnt); - curr = H5FL_FREE(H5S_pnt_node_t, curr); - curr = next; - } /* end while */ + /* Free the point list */ + H5S__free_pnt_list(space->select.sel_info.pnt_lst); - /* Free & reset the point list header */ - space->select.sel_info.pnt_lst = H5FL_FREE(H5S_pnt_list_t, space->select.sel_info.pnt_lst); + /* Reset the point list header */ + space->select.sel_info.pnt_lst = NULL; /* Reset the number of elements in the selection */ space->select.num_elem = 0; @@ -550,10 +739,7 @@ H5S__point_release(H5S_t *space) array elements are iterated through when I/O is performed. Duplicate coordinates are not checked for. The selection operator, OP, determines how the new selection is to be combined with the existing selection for - the dataspace. Currently, only H5S_SELECT_SET is supported, which replaces - the existing selection with the one defined in this call. When operators - other than H5S_SELECT_SET are used to combine a new selection with an - existing selection, the selection ordering is reset to 'C' array ordering. + the dataspace. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES @@ -580,8 +766,14 @@ H5S_select_elements(H5S_t *space, H5S_seloper_t op, size_t num_elem, /* Allocate space for the point selection information if necessary */ if(H5S_GET_SELECT_TYPE(space) != H5S_SEL_POINTS || space->select.sel_info.pnt_lst == NULL) { + hsize_t tmp = HSIZET_MAX; + if(NULL == (space->select.sel_info.pnt_lst = H5FL_CALLOC(H5S_pnt_list_t))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate element information") + + /* Set the bound box to the default value */ + H5VM_array_fill(space->select.sel_info.pnt_lst->low_bounds, &tmp, sizeof(hsize_t), space->extent.rank); + HDmemset(space->select.sel_info.pnt_lst->high_bounds, 0, sizeof(hsize_t) * space->extent.rank); } /* Add points to selection */ @@ -598,57 +790,56 @@ done: /*-------------------------------------------------------------------------- NAME - H5S__point_copy + H5S__copy_pnt_list PURPOSE - Copy a selection from one dataspace to another + Copy a point selection list USAGE - herr_t H5S_point_copy(dst, src) - H5S_t *dst; OUT: Pointer to the destination dataspace - H5S_t *src; IN: Pointer to the source dataspace + H5S_pnt_list_t *H5S__copy_pnt_list(src) + const H5S_pnt_list_t *src; IN: Pointer to the source point list + unsigned rank; IN: # of dimensions for points RETURNS - Non-negative on success/Negative on failure + Non-NULL pointer to new point list on success / NULL on failure DESCRIPTION - Copies all the point selection information from the source - dataspace to the destination dataspace. + Copies point selection information from the source point list to newly + created point list. GLOBAL VARIABLES COMMENTS, BUGS, ASSUMPTIONS EXAMPLES REVISION LOG --------------------------------------------------------------------------*/ -static herr_t -H5S__point_copy(H5S_t *dst, const H5S_t *src, hbool_t H5_ATTR_UNUSED share_selection) +static H5S_pnt_list_t * +H5S__copy_pnt_list(const H5S_pnt_list_t *src, unsigned rank) { - H5S_pnt_node_t *curr, *new_node, *new_tail; /* Point information nodes */ - herr_t ret_value = SUCCEED; /* Return value */ + H5S_pnt_list_t *dst = NULL; /* New point list */ + H5S_pnt_node_t *curr, *new_tail; /* Point information nodes */ + H5S_pnt_list_t *ret_value = NULL; /* Return value */ FUNC_ENTER_STATIC /* Sanity checks */ HDassert(src); - HDassert(dst); + HDassert(rank > 0); /* Allocate room for the head of the point list */ - if(NULL == (dst->select.sel_info.pnt_lst = H5FL_MALLOC(H5S_pnt_list_t))) - HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate point list node") + if(NULL == (dst = H5FL_MALLOC(H5S_pnt_list_t))) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, NULL, "can't allocate point list node") - curr = src->select.sel_info.pnt_lst->head; + curr = src->head; new_tail = NULL; while(curr) { + H5S_pnt_node_t *new_node; /* New point information node */ + /* Create new point */ - if(NULL == (new_node = H5FL_MALLOC(H5S_pnt_node_t))) - HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate point node") + if(NULL == (new_node = (H5S_pnt_node_t *)H5FL_ARR_MALLOC(hcoords_t, rank))) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, NULL, "can't allocate point node") new_node->next = NULL; - if(NULL == (new_node->pnt = (hsize_t *)H5MM_malloc(src->extent.rank * sizeof(hsize_t)))) { - new_node = H5FL_FREE(H5S_pnt_node_t, new_node); - HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate coordinate information") - } /* end if */ /* Copy over the point's coordinates */ - H5MM_memcpy(new_node->pnt, curr->pnt, (src->extent.rank * sizeof(hsize_t))); + H5MM_memcpy(new_node->pnt, curr->pnt, (rank * sizeof(hsize_t))); /* Keep the order the same when copying */ if(NULL == new_tail) - new_tail = dst->select.sel_info.pnt_lst->head = new_node; + new_tail = dst->head = new_node; else { new_tail->next = new_node; new_tail = new_node; @@ -656,22 +847,101 @@ H5S__point_copy(H5S_t *dst, const H5S_t *src, hbool_t H5_ATTR_UNUSED share_selec curr = curr->next; } /* end while */ + dst->tail = new_tail; + + /* Copy the selection bounds */ + H5MM_memcpy(dst->high_bounds, src->high_bounds, (rank * sizeof(hsize_t))); + H5MM_memcpy(dst->low_bounds, src->low_bounds, (rank * sizeof(hsize_t))); + + /* Set return value */ + ret_value = dst; done: - if(ret_value < 0 && dst->select.sel_info.pnt_lst) { - /* Traverse the (incomplete?) dst list, freeing all memory */ - curr = dst->select.sel_info.pnt_lst->head; - while(curr) { - H5S_pnt_node_t *tmp_node = curr; - - curr->pnt = (hsize_t *)H5MM_xfree(curr->pnt); - curr = curr->next; - tmp_node = H5FL_FREE(H5S_pnt_node_t, tmp_node); - } /* end while */ + if(NULL == ret_value && dst) + H5S__free_pnt_list(dst); - dst->select.sel_info.pnt_lst = H5FL_FREE(H5S_pnt_list_t, dst->select.sel_info.pnt_lst); - } /* end if */ + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S__copy_pnt_list() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S__free_pnt_list + PURPOSE + Free a point selection list + USAGE + void H5S__free_pnt_list(pnt_lst) + H5S_pnt_list_t *pnt_lst; IN: Pointer to the point list to free + RETURNS + None + DESCRIPTION + Frees point selection information from the point list + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +static void +H5S__free_pnt_list(H5S_pnt_list_t *pnt_lst) +{ + H5S_pnt_node_t *curr; /* Point information nodes */ + + FUNC_ENTER_STATIC_NOERR + + /* Sanity checks */ + HDassert(pnt_lst); + + /* Traverse the list, freeing all memory */ + curr = pnt_lst->head; + while(curr) { + H5S_pnt_node_t *tmp_node = curr; + + curr = curr->next; + tmp_node = (H5S_pnt_node_t *)H5FL_ARR_FREE(hcoords_t, tmp_node); + } /* end while */ + + H5FL_FREE(H5S_pnt_list_t, pnt_lst); + + FUNC_LEAVE_NOAPI_VOID +} /* end H5S__free_pnt_list() */ + +/*-------------------------------------------------------------------------- + NAME + H5S__point_copy + PURPOSE + Copy a selection from one dataspace to another + USAGE + herr_t H5S__point_copy(dst, src, share_selection) + H5S_t *dst; OUT: Pointer to the destination dataspace + H5S_t *src; IN: Pointer to the source dataspace + hbool_t share_selection; IN: Whether to share the selection between the dataspaces + RETURNS + Non-negative on success/Negative on failure + DESCRIPTION + Copies all the point selection information from the source + dataspace to the destination dataspace. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +static herr_t +H5S__point_copy(H5S_t *dst, const H5S_t *src, hbool_t H5_ATTR_UNUSED share_selection) +{ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_STATIC + + /* Sanity checks */ + HDassert(src); + HDassert(dst); + + /* Allocate room for the head of the point list */ + if(NULL == (dst->select.sel_info.pnt_lst = H5S__copy_pnt_list(src->select.sel_info.pnt_lst, src->extent.rank))) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOPY, FAIL, "can't copy point list") + +done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5S__point_copy() */ @@ -699,7 +969,6 @@ done: static htri_t H5S__point_is_valid(const H5S_t *space) { - H5S_pnt_node_t *curr; /* Point information nodes */ unsigned u; /* Counter */ htri_t ret_value = TRUE; /* Return value */ @@ -707,20 +976,14 @@ H5S__point_is_valid(const H5S_t *space) HDassert(space); - /* Check each point to determine whether selection+offset is within extent */ - curr = space->select.sel_info.pnt_lst->head; - while(curr != NULL) { - /* Check each dimension */ - for(u = 0; u < space->extent.rank; u++) { - /* Check if an offset has been defined */ - /* Bounds check the selected point + offset against the extent */ - if(((curr->pnt[u] + (hsize_t)space->select.offset[u]) > space->extent.size[u]) - || (((hssize_t)curr->pnt[u] + space->select.offset[u]) < 0)) - HGOTO_DONE(FALSE) - } /* end for */ - - curr = curr->next; - } /* end while */ + /* Check each dimension */ + for(u = 0; u < space->extent.rank; u++) { + /* Bounds check the selected point + offset against the extent */ + if((space->select.sel_info.pnt_lst->high_bounds[u] + (hsize_t)space->select.offset[u]) > space->extent.size[u]) + HGOTO_DONE(FALSE) + if(((hssize_t)space->select.sel_info.pnt_lst->low_bounds[u] + space->select.offset[u]) < 0) + HGOTO_DONE(FALSE) + } /* end for */ done: FUNC_LEAVE_NOAPI(ret_value) @@ -854,7 +1117,7 @@ H5S__point_serial_size(const H5S_t *space) HDassert(space); - /* Determine the version */ + /* Determine the version and encoded size for point selection */ if(H5S__point_get_version_enc_size(space, &version, &enc_size) < 0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "can't determine version and enc_size") @@ -866,7 +1129,7 @@ H5S__point_serial_size(const H5S_t *space) * <type (4 bytes)> + <version (4 bytes)> + <padding (4 bytes)> + * <length (4 bytes)> + <rank (4 bytes)> */ - ret_value=20; + ret_value = 20; /* <num points (depend on enc_size)> */ ret_value += enc_size; @@ -925,7 +1188,7 @@ H5S__point_serialize(const H5S_t *space, uint8_t **p) pp = (*p); HDassert(pp); - /* Determine the version */ + /* Determine the version and encoded size for point selection info */ if(H5S__point_get_version_enc_size(space, &version, &enc_size) < 0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "can't determine version and enc_size") @@ -1003,7 +1266,7 @@ H5S__point_deserialize(H5S_t **space, const uint8_t **p) uint32_t version; /* Version number */ hsize_t *coord = NULL, *tcoord; /* Pointer to array of elements */ const uint8_t *pp; /* Local pointer for decoding */ - size_t num_elem = 0; /* Number of elements in selection */ + uint64_t num_elem = 0; /* Number of elements in selection */ unsigned rank; /* Rank of points */ unsigned i, j; /* local counting variables */ herr_t ret_value = SUCCEED; /* Return value */ @@ -1094,7 +1357,7 @@ done: Get the list of element points currently selected USAGE herr_t H5S__get_select_elem_pointlist(space, hsize_t *buf) - H5S_t *space; IN: Dataspace pointer of selection to query + const H5S_t *space; IN: Dataspace pointer of selection to query hsize_t startpoint; IN: Element point to start with hsize_t numpoints; IN: Number of element points to get hsize_t *buf; OUT: List of element points selected @@ -1117,7 +1380,7 @@ done: REVISION LOG --------------------------------------------------------------------------*/ static herr_t -H5S__get_select_elem_pointlist(H5S_t *space, hsize_t startpoint, hsize_t numpoints, hsize_t *buf) +H5S__get_select_elem_pointlist(const H5S_t *space, hsize_t startpoint, hsize_t numpoints, hsize_t *buf) { H5S_pnt_node_t *node; /* Point node */ unsigned rank; /* Dataspace rank */ @@ -1234,8 +1497,6 @@ done: static herr_t H5S__point_bounds(const H5S_t *space, hsize_t *start, hsize_t *end) { - H5S_pnt_node_t *node; /* Point node */ - unsigned rank; /* Dataspace rank */ unsigned u; /* Local index variable */ herr_t ret_value = SUCCEED; /* Return value */ @@ -1246,30 +1507,19 @@ H5S__point_bounds(const H5S_t *space, hsize_t *start, hsize_t *end) HDassert(start); HDassert(end); - /* Get the dataspace extent rank */ - rank = space->extent.rank; + /* Loop over dimensions */ + for(u = 0; u < space->extent.rank; u++) { + /* Sanity check */ + HDassert(space->select.sel_info.pnt_lst->low_bounds[u] <= space->select.sel_info.pnt_lst->high_bounds[u]); - /* Set the start and end arrays up */ - for(u = 0; u < rank; u++) { - start[u] = HSIZET_MAX; - end[u] = 0; - } /* end for */ + /* Check for offset moving selection negative */ + if(((hssize_t)space->select.sel_info.pnt_lst->low_bounds[u] + space->select.offset[u]) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "offset moves selection out of bounds") - /* Iterate through the node, checking the bounds on each element */ - node = space->select.sel_info.pnt_lst->head; - while(node != NULL) { - for(u = 0; u < rank; u++) { - /* Check for offset moving selection negative */ - if(((hssize_t)node->pnt[u] + space->select.offset[u]) < 0) - HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "offset moves selection out of bounds") - - if(start[u] > (hsize_t)((hssize_t)node->pnt[u] + space->select.offset[u])) - start[u] = (hsize_t)((hssize_t)node->pnt[u] + space->select.offset[u]); - if(end[u] < (hsize_t)((hssize_t)node->pnt[u] + space->select.offset[u])) - end[u] = (hsize_t)((hssize_t)node->pnt[u] + space->select.offset[u]); - } /* end for */ - node = node->next; - } /* end while */ + /* Set the low & high bounds in this dimension */ + start[u] = (hsize_t)((hssize_t)space->select.sel_info.pnt_lst->low_bounds[u] + space->select.offset[u]); + end[u] = (hsize_t)((hssize_t)space->select.sel_info.pnt_lst->high_bounds[u] + space->select.offset[u]); + } /* end for */ done: FUNC_LEAVE_NOAPI(ret_value) @@ -1489,6 +1739,171 @@ H5S__point_is_regular(const H5S_t *space) /*-------------------------------------------------------------------------- NAME + H5S__point_shape_same + PURPOSE + Check if a two "point" selections are the same shape + USAGE + htri_t H5S__point_shape_same(space1, space2) + const H5S_t *space1; IN: First dataspace to check + const H5S_t *space2; IN: Second dataspace to check + RETURNS + TRUE / FALSE / FAIL + DESCRIPTION + Checks to see if the current selection in each dataspace are the same + shape. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +static htri_t +H5S__point_shape_same(const H5S_t *space1, const H5S_t *space2) +{ + H5S_pnt_node_t *pnt1, *pnt2; /* Point information nodes */ + hssize_t offset[H5S_MAX_RANK]; /* Offset between the selections */ + unsigned space1_rank; /* Number of dimensions of first dataspace */ + unsigned space2_rank; /* Number of dimensions of second dataspace */ + int space1_dim; /* Current dimension in first dataspace */ + int space2_dim; /* Current dimension in second dataspace */ + htri_t ret_value = TRUE; /* Return value */ + + FUNC_ENTER_STATIC_NOERR + + /* Check args */ + HDassert(space1); + HDassert(space2); + + /* Get dataspace ranks */ + space1_rank = space1->extent.rank; + space2_rank = space2->extent.rank; + + /* Sanity check */ + HDassert(space1_rank >= space2_rank); + HDassert(space2_rank > 0); + + /* Initialize dimensions */ + space1_dim = (int)space1_rank - 1; + space2_dim = (int)space2_rank - 1; + + /* Look at first point in each selection to compute the offset for common + * dimensions. + */ + pnt1 = space1->select.sel_info.pnt_lst->head; + pnt2 = space2->select.sel_info.pnt_lst->head; + while(space2_dim >= 0) { + /* Set the relative locations of the selections */ + offset[space1_dim] = (hssize_t)pnt2->pnt[space2_dim] - (hssize_t)pnt1->pnt[space1_dim]; + + space1_dim--; + space2_dim--; + } /* end while */ + + /* For dimensions that appear only in space1: */ + while(space1_dim >= 0) { + /* Set the absolute offset of the remaining dimensions */ + offset[space1_dim] = (hssize_t)pnt1->pnt[space1_dim]; + + space1_dim--; + } /* end while */ + + /* Advance to next point */ + pnt1 = pnt1->next; + pnt2 = pnt2->next; + + /* Loop over remaining points */ + while(pnt1 && pnt2) { + /* Initialize dimensions */ + space1_dim = (int)space1_rank - 1; + space2_dim = (int)space2_rank - 1; + + /* Compare locations in common dimensions, including relative offset */ + while(space2_dim >= 0) { + if((hsize_t)((hssize_t)pnt1->pnt[space1_dim] + offset[space1_dim]) != pnt2->pnt[space2_dim]) + HGOTO_DONE(FALSE) + + space1_dim--; + space2_dim--; + } /* end while */ + + /* For dimensions that appear only in space1: */ + while(space1_dim >= 0) { + /* Compare the absolute offset in the remaining dimensions */ + if((hssize_t)pnt1->pnt[space1_dim] != offset[space1_dim]) + HGOTO_DONE(FALSE) + + space1_dim--; + } /* end while */ + + + /* Advance to next point */ + pnt1 = pnt1->next; + pnt2 = pnt2->next; + } /* end while */ + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S__point_shape_same() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S__point_intersect_block + PURPOSE + Detect intersections of selection with block + USAGE + htri_t H5S__point_intersect_block(space, start, end) + const H5S_t *space; IN: Dataspace with selection to use + const hsize_t *start; IN: Starting coordinate for block + const hsize_t *end; IN: Ending coordinate for block + RETURNS + Non-negative TRUE / FALSE on success, negative on failure + DESCRIPTION + Quickly detect intersections with a block + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +htri_t +H5S__point_intersect_block(const H5S_t *space, const hsize_t *start, + const hsize_t *end) +{ + H5S_pnt_node_t *pnt; /* Point information node */ + htri_t ret_value = FALSE; /* Return value */ + + FUNC_ENTER_STATIC_NOERR + + /* Sanity check */ + HDassert(space); + HDassert(H5S_SEL_POINTS == H5S_GET_SELECT_TYPE(space)); + HDassert(start); + HDassert(end); + + /* Loop over points */ + pnt = space->select.sel_info.pnt_lst->head; + while(pnt) { + unsigned u; /* Local index variable */ + + /* Verify that the point is within the block */ + for(u = 0; u < space->extent.rank; u++) + if(pnt->pnt[u] < start[u] || pnt->pnt[u] > end[u]) + break; + + /* Check if point was within block for all dimensions */ + if(u == space->extent.rank) + HGOTO_DONE(TRUE) + + /* Advance to next point */ + pnt = pnt->next; + } /* end while */ + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S__point_intersect_block() */ + + +/*-------------------------------------------------------------------------- + NAME H5S__point_adjust_u PURPOSE Adjust a "point" selection by subtracting an offset @@ -1543,12 +1958,88 @@ H5S__point_adjust_u(H5S_t *space, const hsize_t *offset) /* Advance to next point node in selection */ node = node->next; } /* end while */ + + /* update the bound box of the selection */ + for(u = 0; u < rank; u++) { + space->select.sel_info.pnt_lst->low_bounds[u] -= offset[u]; + space->select.sel_info.pnt_lst->high_bounds[u] -= offset[u]; + } /* end for */ } /* end if */ FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5S__point_adjust_u() */ +/*-------------------------------------------------------------------------- + NAME + H5S__point_adjust_s + PURPOSE + Adjust a "point" selection by subtracting an offset + USAGE + herr_t H5S__point_adjust_u(space, offset) + H5S_t *space; IN/OUT: Pointer to dataspace to adjust + const hssize_t *offset; IN: Offset to subtract + RETURNS + Non-negative on success, negative on failure + DESCRIPTION + Moves a point selection by subtracting an offset from it. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +static herr_t +H5S__point_adjust_s(H5S_t *space, const hssize_t *offset) +{ + hbool_t non_zero_offset = FALSE; /* Whether any offset is non-zero */ + H5S_pnt_node_t *node; /* Point node */ + unsigned rank; /* Dataspace rank */ + unsigned u; /* Local index variable */ + + FUNC_ENTER_STATIC_NOERR + + HDassert(space); + HDassert(offset); + + /* Check for an all-zero offset vector */ + for(u = 0; u < space->extent.rank; u++) + if(0 != offset[u]) { + non_zero_offset = TRUE; + break; + } /* end if */ + + /* Only perform operation if the offset is non-zero */ + if(non_zero_offset) { + /* Iterate through the nodes, checking the bounds on each element */ + node = space->select.sel_info.pnt_lst->head; + rank = space->extent.rank; + while(node) { + /* Adjust each coordinate for point node */ + for(u = 0; u < rank; u++) { + /* Check for offset moving selection negative */ + HDassert((hssize_t)node->pnt[u] >= offset[u]); + + /* Adjust node's coordinate location */ + node->pnt[u] = (hsize_t)((hssize_t)node->pnt[u] - offset[u]); + } /* end for */ + + /* Advance to next point node in selection */ + node = node->next; + } /* end while */ + + /* update the bound box of the selection */ + for(u = 0; u < rank; u++) { + HDassert((hssize_t)space->select.sel_info.pnt_lst->low_bounds[u] >= offset[u]); + space->select.sel_info.pnt_lst->low_bounds[u] = (hsize_t)((hssize_t)space->select.sel_info.pnt_lst->low_bounds[u] - offset[u]); + space->select.sel_info.pnt_lst->high_bounds[u] = (hsize_t)((hssize_t)space->select.sel_info.pnt_lst->high_bounds[u] - offset[u]); + } /* end for */ + } /* end if */ + + FUNC_LEAVE_NOAPI(SUCCEED) +} /* end H5S__point_adjust_s() */ + + + /*------------------------------------------------------------------------- * Function: H5S__point_project_scalar * @@ -1609,6 +2100,7 @@ H5S__point_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *of H5S_pnt_node_t *new_node; /* Point node in new space */ H5S_pnt_node_t *prev_node; /* Previous point node in new space */ unsigned rank_diff; /* Difference in ranks between spaces */ + unsigned u; /* Local index variable */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC @@ -1643,13 +2135,9 @@ H5S__point_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *of prev_node = NULL; while(base_node) { /* Create new point */ - if(NULL == (new_node = H5FL_MALLOC(H5S_pnt_node_t))) + if(NULL == (new_node = (H5S_pnt_node_t *)H5FL_ARR_MALLOC(hcoords_t, new_space->extent.rank))) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate point node") new_node->next = NULL; - if(NULL == (new_node->pnt = (hsize_t *)H5MM_malloc(new_space->extent.rank * sizeof(hsize_t)))) { - new_node = H5FL_FREE(H5S_pnt_node_t, new_node); - HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate coordinate information") - } /* end if */ /* Copy over the point's coordinates */ H5MM_memcpy(new_node->pnt, &base_node->pnt[rank_diff], (new_space->extent.rank * sizeof(hsize_t))); @@ -1665,6 +2153,12 @@ H5S__point_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *of /* Advance to next node */ base_node = base_node->next; } /* end while */ + + /* Update the bounding box */ + for(u = 0; u < new_space->extent.rank; u++) { + new_space->select.sel_info.pnt_lst->low_bounds[u] = base_space->select.sel_info.pnt_lst->low_bounds[u + rank_diff]; + new_space->select.sel_info.pnt_lst->high_bounds[u] = base_space->select.sel_info.pnt_lst->high_bounds[u + rank_diff]; + } /* end for */ } /* end if */ else { HDassert(new_space->extent.rank > base_space->extent.rank); @@ -1680,13 +2174,9 @@ H5S__point_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *of prev_node = NULL; while(base_node) { /* Create new point */ - if(NULL == (new_node = H5FL_MALLOC(H5S_pnt_node_t))) + if(NULL == (new_node = (H5S_pnt_node_t *)H5FL_ARR_MALLOC(hcoords_t, new_space->extent.rank))) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate point node") new_node->next = NULL; - if(NULL == (new_node->pnt = (hsize_t *)H5MM_malloc(new_space->extent.rank * sizeof(hsize_t)))) { - new_node = H5FL_FREE(H5S_pnt_node_t, new_node); - HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate coordinate information") - } /* end if */ /* Copy over the point's coordinates */ HDmemset(new_node->pnt, 0, sizeof(hsize_t) * rank_diff); @@ -1703,6 +2193,16 @@ H5S__point_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *of /* Advance to next node */ base_node = base_node->next; } /* end while */ + + /* Update the bounding box */ + for(u = 0; u < rank_diff; u++) { + new_space->select.sel_info.pnt_lst->low_bounds[u] = 0; + new_space->select.sel_info.pnt_lst->high_bounds[u] = 0; + } /* end for */ + for(; u < new_space->extent.rank; u++) { + new_space->select.sel_info.pnt_lst->low_bounds[u] = base_space->select.sel_info.pnt_lst->low_bounds[u - rank_diff]; + new_space->select.sel_info.pnt_lst->high_bounds[u] = base_space->select.sel_info.pnt_lst->high_bounds[u - rank_diff]; + } /* end for */ } /* end else */ /* Number of elements selected will be the same */ @@ -1776,141 +2276,3 @@ done: FUNC_LEAVE_API(ret_value) } /* end H5Sselect_elements() */ - -/*-------------------------------------------------------------------------- - NAME - H5S__point_get_seq_list - PURPOSE - Create a list of offsets & lengths for a selection - USAGE - herr_t H5S__point_get_seq_list(space,flags,iter,maxseq,maxelem,nseq,nelem,off,len) - H5S_t *space; IN: Dataspace containing selection to use. - unsigned flags; IN: Flags for extra information about operation - H5S_sel_iter_t *iter; IN/OUT: Selection iterator describing last - position of interest in selection. - size_t maxseq; IN: Maximum number of sequences to generate - size_t maxelem; IN: Maximum number of elements to include in the - generated sequences - size_t *nseq; OUT: Actual number of sequences generated - size_t *nelem; OUT: Actual number of elements in sequences generated - hsize_t *off; OUT: Array of offsets - size_t *len; OUT: Array of lengths - RETURNS - Non-negative on success/Negative on failure. - DESCRIPTION - Use the selection in the dataspace to generate a list of byte offsets and - lengths for the region(s) selected. Start/Restart from the position in the - ITER parameter. The number of sequences generated is limited by the MAXSEQ - parameter and the number of sequences actually generated is stored in the - NSEQ parameter. - GLOBAL VARIABLES - COMMENTS, BUGS, ASSUMPTIONS - EXAMPLES - REVISION LOG ---------------------------------------------------------------------------*/ -static herr_t -H5S__point_get_seq_list(const H5S_t *space, unsigned flags, H5S_sel_iter_t *iter, - size_t maxseq, size_t maxelem, size_t *nseq, size_t *nelem, - hsize_t *off, size_t *len) -{ - size_t io_left; /* The number of bytes left in the selection */ - size_t start_io_left; /* The initial number of bytes left in the selection */ - H5S_pnt_node_t *node; /* Point node */ - hsize_t dims[H5S_MAX_RANK]; /* Total size of memory buf */ - int ndims; /* Dimensionality of space*/ - hsize_t acc; /* Coordinate accumulator */ - hsize_t loc; /* Coordinate offset */ - size_t curr_seq; /* Current sequence being operated on */ - int i; /* Local index variable */ - herr_t ret_value=SUCCEED; /* return value */ - - FUNC_ENTER_STATIC - - /* Check args */ - HDassert(space); - HDassert(iter); - HDassert(maxseq > 0); - HDassert(maxelem > 0); - HDassert(nseq); - HDassert(nelem); - HDassert(off); - HDassert(len); - - /* Choose the minimum number of bytes to sequence through */ - H5_CHECK_OVERFLOW(iter->elmt_left, hsize_t, size_t); - start_io_left = io_left = (size_t)MIN(iter->elmt_left, maxelem); - - /* Get the dataspace dimensions */ - if((ndims = H5S_get_simple_extent_dims (space, dims, NULL)) < 0) - HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "unable to retrieve dataspace dimensions") - - /* Walk through the points in the selection, starting at the current */ - /* location in the iterator */ - node = iter->u.pnt.curr; - curr_seq = 0; - while(NULL != node) { - /* Compute the offset of each selected point in the buffer */ - for(i = ndims - 1, acc = iter->elmt_size, loc = 0; i >= 0; i--) { - loc += (hsize_t)((hssize_t)node->pnt[i] + space->select.offset[i]) * acc; - acc *= dims[i]; - } /* end for */ - - /* Check if this is a later point in the selection */ - if(curr_seq > 0) { - /* If a sorted sequence is requested, make certain we don't go backwards in the offset */ - if((flags & H5S_GET_SEQ_LIST_SORTED) && loc < off[curr_seq-1]) - break; - - /* Check if this point extends the previous sequence */ - /* (Unlikely, but possible) */ - if(loc == (off[curr_seq-1] + len[curr_seq-1])) { - /* Extend the previous sequence */ - len[curr_seq-1] += iter->elmt_size; - } /* end if */ - else { - /* Add a new sequence */ - off[curr_seq] = loc; - len[curr_seq] = iter->elmt_size; - - /* Increment sequence count */ - curr_seq++; - } /* end else */ - } /* end if */ - else { - /* Add a new sequence */ - off[curr_seq] = loc; - len[curr_seq] = iter->elmt_size; - - /* Increment sequence count */ - curr_seq++; - } /* end else */ - - /* Decrement number of elements left to process */ - io_left--; - - /* Move the iterator */ - iter->u.pnt.curr = node->next; - iter->elmt_left--; - - /* Check if we're finished with all sequences */ - if(curr_seq == maxseq) - break; - - /* Check if we're finished with all the elements available */ - if(io_left == 0) - break; - - /* Advance to the next point */ - node = node->next; - } /* end while */ - - /* Set the number of sequences generated */ - *nseq = curr_seq; - - /* Set the number of elements used */ - *nelem = start_io_left-io_left; - -done: - FUNC_LEAVE_NOAPI(ret_value) -} /* end H5S__point_get_seq_list() */ - |