diff options
Diffstat (limited to 'src/H5Spoint.c')
| -rw-r--r-- | src/H5Spoint.c | 279 |
1 files changed, 140 insertions, 139 deletions
diff --git a/src/H5Spoint.c b/src/H5Spoint.c index 11cf448..6411b94 100644 --- a/src/H5Spoint.c +++ b/src/H5Spoint.c @@ -371,6 +371,144 @@ H5S__point_iter_next_block(H5S_sel_iter_t *iter) /*-------------------------------------------------------------------------- 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 (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_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() */ + + +/*-------------------------------------------------------------------------- + NAME H5S__point_iter_release PURPOSE Release point selection iterator information for a dataspace @@ -525,7 +663,7 @@ H5S__point_release(H5S_t *space) { H5S_pnt_node_t *curr, *next; /* Point selection nodes */ - FUNC_ENTER_NOAPI_NOINIT_NOERR + FUNC_ENTER_STATIC_NOERR /* Check args */ HDassert(space); @@ -640,6 +778,7 @@ H5S__point_copy(H5S_t *dst, const H5S_t *src, hbool_t H5_ATTR_UNUSED share_selec FUNC_ENTER_STATIC + /* Sanity checks */ HDassert(src); HDassert(dst); @@ -1651,141 +1790,3 @@ 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() */ - |