diff options
Diffstat (limited to 'src/H5Shyper.c')
| -rw-r--r-- | src/H5Shyper.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/H5Shyper.c b/src/H5Shyper.c index 92f4b10..10502e8 100644 --- a/src/H5Shyper.c +++ b/src/H5Shyper.c @@ -70,6 +70,10 @@ static herr_t H5S_hyper_iter_next(H5S_sel_iter_t *sel_iter, size_t nelem); static herr_t H5S_hyper_iter_next_block(H5S_sel_iter_t *sel_iter); static herr_t H5S_hyper_iter_release(H5S_sel_iter_t *sel_iter); +/* Static function for optimizing hyperslab */ +static int H5S_hyper_check_opt(H5S_hyper_span_t *span, H5S_hyper_dim_t span_slab_info[], int rank); +static int compare_regular_info( H5S_hyper_dim_t span_slab_info_1, H5S_hyper_dim_t span_slab_info_2); + /* Selection properties for hyperslab selections */ const H5S_select_class_t H5S_sel_hyper[1] = {{ H5S_SEL_HYPERSLABS, @@ -5331,6 +5335,7 @@ done: } /* H5S_hyper_make_spans() */ +#if 0 /*-------------------------------------------------------------------------- NAME H5S_hyper_can_rebuild @@ -5383,6 +5388,180 @@ done: FUNC_LEAVE_NOAPI(ret_value); } /* H5S_hyper_can_rebuild() */ +#endif +static htri_t +H5S_hyper_can_rebuild (const H5S_t *space) +{ + H5S_hyper_dim_t *top_span_slab_info; + H5S_hyper_dim_t *diminfo; + H5S_hyper_dim_t *app_diminfo; + int rank,curr_dim; + htri_t ret_value=TRUE; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5S_hyper_can_rebuild); + + /* Check args */ + assert (space); + assert (space->select.sel_info.hslab->span_lst); + + rank = space->extent.rank; + top_span_slab_info = calloc(rank,sizeof(H5S_hyper_dim_t)); + if(H5S_hyper_check_opt(space->select.sel_info.hslab->span_lst->head,top_span_slab_info,rank)== -1){ + ret_value = FALSE; + } + else { + + diminfo=space->select.sel_info.hslab->opt_diminfo; + app_diminfo=space->select.sel_info.hslab->app_diminfo; + + for(curr_dim = 0; curr_dim <rank; curr_dim++) { + app_diminfo[rank-curr_dim-1].start = diminfo[rank-curr_dim-1].start = top_span_slab_info[curr_dim].start; + app_diminfo[rank-curr_dim-1].stride = diminfo[rank-curr_dim-1].stride = top_span_slab_info[curr_dim].stride; + app_diminfo[rank-curr_dim-1].count = diminfo[rank-curr_dim-1].count = top_span_slab_info[curr_dim].count; + app_diminfo[rank-curr_dim-1].block = diminfo[rank-curr_dim-1].block = top_span_slab_info[curr_dim].block; + + } + + space->select.sel_info.hslab->diminfo_valid=TRUE; + } + /* For each level of the span tree check that there is only one span at + * that level. + */ + +done: + FUNC_LEAVE_NOAPI(ret_value); +} /* H5S_hyper_can_rebuild() */ + +static int H5S_hyper_check_opt(H5S_hyper_span_t *span, H5S_hyper_dim_t span_slab_info[], int rank) { + + hsize_t curr_stride,next_stride; + hsize_t curr_block,next_block; + hsize_t curr_start; + hsize_t curr_low; + int outcount; + int ret_value; + + H5S_hyper_dim_t next_down_span_slab_info; + H5S_hyper_dim_t curr_down_span_slab_info; + H5S_hyper_span_t *curr_span; + H5S_hyper_span_t *next_span; + H5S_hyper_span_t *orig_span; + H5S_hyper_span_t *next_down_span; + H5S_hyper_span_t *curr_down_span; + + curr_stride = 1; + curr_block = 0; + outcount = 0; + + orig_span = span; + /* calculate the first span */ + if(span) { + /* check the current span, if any "down" span is irregular, return -1. */ + curr_span = span; + if(curr_span->down) { + curr_down_span = curr_span->down->head; + if(curr_down_span) { + ret_value = H5S_hyper_check_opt(curr_down_span,span_slab_info,rank -1); + curr_down_span_slab_info = span_slab_info[rank-2]; + if(ret_value == -1) return -1; + } + else + curr_down_span_slab_info.count = 0; + } + else + curr_down_span_slab_info.count = 0; + + /* check the block of this span,if the adjacent block is not the same, irregular selection, return -1. */ + curr_block = curr_span->high - curr_span->low + 1; + curr_low = curr_span->low; + curr_start = curr_low; + + span = span->next; + outcount ++; + } + + while(span) { + + /* check the next span, if any "down" span is irregular, return -1. */ + next_span = span; + + if(next_span->down) { + next_down_span = next_span->down->head; + if(next_down_span) { + ret_value = H5S_hyper_check_opt(next_down_span,span_slab_info,rank-1); + next_down_span_slab_info = span_slab_info[rank-2]; + if(ret_value == -1) return -1; + } + else + next_down_span_slab_info.count = 0; + } + else + next_down_span_slab_info.count = 0; + + next_stride = next_span->low - curr_low; + next_block = next_span->high - next_span->low+1; + + + /* Compare stride and block in this span*/ + if(outcount!=1 && curr_stride != next_stride) { + + return -1; + } + if(next_block != curr_block) { + + return -1; + } + curr_stride = next_stride; + curr_block = next_block; + curr_low = next_span->low; + + /* compare the slab information of the down span tree of the adjacent spans */ + + + if(!compare_regular_info(curr_down_span_slab_info,next_down_span_slab_info)) { + return -1; + } + + curr_down_span_slab_info = next_down_span_slab_info; + span = span->next; + outcount ++; + } + + if(orig_span) { + span_slab_info[rank-1].start = curr_start; + span_slab_info[rank-1].count = outcount; + span_slab_info[rank-1].block = curr_block; + span_slab_info[rank-1].stride = curr_stride; + } + + return 0; + + } + + /*Compare the slab information of two adjacent down span trees, this function shouldn't + be used as a general approach to compare two regular slabs. + + non-zero(true) should be returned if the two slabs are equal or are both NULL. + zero should be returned for other cases. + */ + + static int compare_regular_info( H5S_hyper_dim_t span_slab_info_1, H5S_hyper_dim_t span_slab_info_2) { + + /* Only when the first span of the current span tree has no "down span tree", + and the second span of the current span tree has no "down span tree", the selection is a regular selection. + Otherwise, for either "no down span tree" case, the selection is irregular.*/ + + if((span_slab_info_1.count == 0) && (span_slab_info_2.count ==0 )) return 1; + if((span_slab_info_1.count) && (span_slab_info_2.count)) + return((span_slab_info_1.start == span_slab_info_2.start) && + (span_slab_info_1.stride == span_slab_info_2.stride) && + (span_slab_info_1.block == span_slab_info_2.block) && + (span_slab_info_1.count == span_slab_info_2.count)); + else + return 0; +} + + /*-------------------------------------------------------------------------- NAME @@ -5437,6 +5616,11 @@ H5S_hyper_rebuild (H5S_t *space) app_diminfo[curr_dim].count = diminfo[curr_dim].count = 1; app_diminfo[curr_dim].block = diminfo[curr_dim].block = (span->high-span->low)+1; + HDfprintf(stdout, "start[%d] = %Hu\n",curr_dim,diminfo[curr_dim].start); + HDfprintf(stdout, "stride[%d] = %Hu\n",curr_dim,diminfo[curr_dim].stride); + + HDfprintf(stdout, "count[%d] = %Hu\n",curr_dim,diminfo[curr_dim].count); + HDfprintf(stdout, "block[%d] = %Hu\n",curr_dim,diminfo[curr_dim].block); /* Walk down the span tree */ if(span->down) { span=span->down->head; @@ -5731,11 +5915,14 @@ H5S_generate_hyperslab (H5S_t *space, H5S_seloper_t op, * "optimized" start/stride/count/block information. */ status=H5S_hyper_can_rebuild(space); +#if 0 if(status<0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOUNT, FAIL, "can't check for rebuilding hyperslab info"); + printf("status = %d\n",status); if(status>0) if(H5S_hyper_rebuild(space)<0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOUNT, FAIL, "can't rebuild hyperslab info"); +#endif } /* end if */ } /* end else */ } /* end else */ @@ -6263,11 +6450,14 @@ H5S_operate_hyperslab (H5S_t *result, H5S_hyper_span_info_t *spans1, H5S_seloper * "optimized" start/stride/count/block information. */ status=H5S_hyper_can_rebuild(result); + #if 0 if(status<0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOUNT, FAIL, "can't check for rebuilding hyperslab info"); + printf("status = %d\n",status); if(status>0) if(H5S_hyper_rebuild(result)<0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOUNT, FAIL, "can't rebuild hyperslab info"); + #endif } /* end if */ } /* end else */ } /* end else */ |