diff options
Diffstat (limited to 'src/H5Shyper.c')
| -rw-r--r-- | src/H5Shyper.c | 1570 |
1 files changed, 1510 insertions, 60 deletions
diff --git a/src/H5Shyper.c b/src/H5Shyper.c index 10bcdd6..28cabf0 100644 --- a/src/H5Shyper.c +++ b/src/H5Shyper.c @@ -45,6 +45,10 @@ static herr_t H5S_hyper_generate_spans(H5S_t *space); #ifdef NEW_HYPERSLAB_API static herr_t H5S_select_select (H5S_t *space1, H5S_seloper_t op, H5S_t *space2); #endif /*NEW_HYPERSLAB_API*/ +static void H5S__hyper_get_clip_diminfo(hsize_t start, hsize_t stride, + hsize_t *count, hsize_t *block, hsize_t clip_size); +static hsize_t H5S__hyper_get_clip_extent_real(const H5S_t *clip_space, + hsize_t num_slices, hbool_t incl_trail); /* Selection callbacks */ static herr_t H5S_hyper_copy(H5S_t *dst, const H5S_t *src, hbool_t share_selection); @@ -55,9 +59,13 @@ static herr_t H5S_hyper_release(H5S_t *space); static htri_t H5S_hyper_is_valid(const H5S_t *space); static hssize_t H5S_hyper_serial_size(const H5S_t *space); static herr_t H5S_hyper_serialize(const H5S_t *space, uint8_t **p); -static herr_t H5S_hyper_deserialize(H5S_t *space, const uint8_t **p); +static herr_t H5S_hyper_deserialize(H5S_t *space, uint32_t version, uint8_t flags, + const uint8_t **p); static herr_t H5S_hyper_bounds(const H5S_t *space, hsize_t *start, hsize_t *end); static herr_t H5S_hyper_offset(const H5S_t *space, hsize_t *offset); +static int H5S__hyper_unlim_dim(const H5S_t *space); +static herr_t H5S_hyper_num_elem_non_unlim(const H5S_t *space, + hsize_t *num_elem_non_unlim); static htri_t H5S_hyper_is_contiguous(const H5S_t *space); static htri_t H5S_hyper_is_single(const H5S_t *space); static htri_t H5S_hyper_is_regular(const H5S_t *space); @@ -94,6 +102,8 @@ const H5S_select_class_t H5S_sel_hyper[1] = {{ H5S_hyper_deserialize, H5S_hyper_bounds, H5S_hyper_offset, + H5S__hyper_unlim_dim, + H5S_hyper_num_elem_non_unlim, H5S_hyper_is_contiguous, H5S_hyper_is_single, H5S_hyper_is_regular, @@ -248,6 +258,7 @@ H5S_hyper_iter_init(H5S_sel_iter_t *iter, const H5S_t *space) /* Check args */ HDassert(space && H5S_SEL_HYPERSLABS == H5S_GET_SELECT_TYPE(space)); HDassert(iter); + HDassert(space->select.sel_info.hslab->unlim_dim < 0); /* Initialize the number of points to iterate over */ iter->elmt_left = space->select.num_elem; @@ -1644,6 +1655,8 @@ H5S_hyper_copy (H5S_t *dst, const H5S_t *src, hbool_t share_selection) dst_hslab->app_diminfo[u]=src_hslab->app_diminfo[u]; } /* end for */ } /* end if */ + dst_hslab->unlim_dim = src_hslab->unlim_dim; + dst_hslab->num_elem_non_unlim = src_hslab->num_elem_non_unlim; dst->select.sel_info.hslab->span_lst=src->select.sel_info.hslab->span_lst; /* Check if there is hyperslab span information to copy */ @@ -1759,6 +1772,10 @@ H5S_hyper_is_valid (const H5S_t *space) HDassert(space); + /* Check for unlimited selection */ + if(space->select.sel_info.hslab->unlim_dim >= 0) + HGOTO_DONE(FALSE) + /* Check for a "regular" hyperslab selection */ if(space->select.sel_info.hslab->diminfo_valid) { const H5S_hyper_dim_t *diminfo=space->select.sel_info.hslab->opt_diminfo; /* local alias for diminfo */ @@ -1863,6 +1880,7 @@ H5S_get_select_hyper_nblocks(H5S_t *space) FUNC_ENTER_NOAPI_NOINIT_NOERR HDassert(space); + HDassert(space->select.sel_info.hslab->unlim_dim < 0); /* Check for a "regular" hyperslab selection */ if(space->select.sel_info.hslab->diminfo_valid) { @@ -1910,6 +1928,8 @@ H5Sget_select_hyper_nblocks(hid_t spaceid) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space") if(H5S_GET_SELECT_TYPE(space) != H5S_SEL_HYPERSLABS) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a hyperslab selection") + if(space->select.sel_info.hslab->unlim_dim >= 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "cannot get number of blocks for unlimited selection") ret_value = (hssize_t)H5S_get_select_hyper_nblocks(space); @@ -1948,24 +1968,41 @@ H5S_hyper_serial_size(const H5S_t *space) HDassert(space); - /* Basic number of bytes required to serialize hyperslab selection: - * <type (4 bytes)> + <version (4 bytes)> + <padding (4 bytes)> + - * <length (4 bytes)> + <rank (4 bytes)> + <# of blocks (4 bytes)> = 24 bytes - */ - ret_value = 24; + /* Check for version (right now, an unlimited dimension is the only thing + * that would bump the version) */ + if(space->select.sel_info.hslab->unlim_dim >= 0) + /* Version 2 */ + /* Size required is always: + * <type (4 bytes)> + <version (4 bytes)> + <flags (1 byte)> + + * <length (4 bytes)> + <rank (4 bytes)> + + * (4 (start/stride/count/block) * <rank> * <value (8 bytes)>) = + * 17 + (4 * rank * 8) bytes + */ + ret_value = (hssize_t)17 + ((hssize_t)4 * (hssize_t)space->extent.rank + * (hssize_t)8); + else { + /* Version 1 */ + /* Basic number of bytes required to serialize hyperslab selection: + * <type (4 bytes)> + <version (4 bytes)> + <padding (4 bytes)> + + * <length (4 bytes)> + <rank (4 bytes)> + <# of blocks (4 bytes)> + * = 24 bytes + */ + ret_value = 24; - /* Check for a "regular" hyperslab selection */ - if(space->select.sel_info.hslab->diminfo_valid) { - /* Check each dimension */ - for(block_count = 1, u = 0; u < space->extent.rank; u++) - block_count *= space->select.sel_info.hslab->opt_diminfo[u].count; - } /* end if */ - else - /* Spin through hyperslab spans, adding 8 * rank bytes for each block */ - block_count = H5S_hyper_span_nblocks(space->select.sel_info.hslab->span_lst); + /* Check for a "regular" hyperslab selection */ + if(space->select.sel_info.hslab->diminfo_valid) { + /* Check each dimension */ + for(block_count = 1, u = 0; u < space->extent.rank; u++) + block_count *= space->select.sel_info.hslab->opt_diminfo[u].count; + } /* end if */ + else + /* Spin through hyperslab spans, adding 8 * rank bytes for each + * block */ + block_count = H5S_hyper_span_nblocks(space->select.sel_info.hslab->span_lst); - H5_CHECK_OVERFLOW((8 * space->extent.rank * block_count), hsize_t, hssize_t); - ret_value += (hssize_t)(8 * block_count * space->extent.rank); + H5_CHECK_OVERFLOW((8 * space->extent.rank * block_count), hsize_t, hssize_t); + ret_value += (hssize_t)(8 * block_count * space->extent.rank); + } /* end else */ FUNC_LEAVE_NOAPI(ret_value) } /* end H5S_hyper_serial_size() */ @@ -2020,8 +2057,7 @@ H5S_hyper_serialize_helper(const H5S_hyper_span_info_t *spans, end[rank]=curr->high; /* Recurse down to the next dimension */ - *p = pp; - H5S_hyper_serialize_helper(curr->down, start, end, rank + 1, p); + H5S_hyper_serialize_helper(curr->down, start, end, rank + 1, &pp); } /* end if */ else { /* Encode all the previous dimensions starting & ending points */ @@ -2079,12 +2115,14 @@ H5S_hyper_serialize(const H5S_t *space, uint8_t **p) const H5S_hyper_dim_t *diminfo; /* Alias for dataspace's diminfo information */ uint8_t *pp = (*p); /* Local pointer for decoding */ hsize_t tmp_count[H5O_LAYOUT_NDIMS]; /* Temporary hyperslab counts */ - hsize_t offset[H5O_LAYOUT_NDIMS]; /* Offset of element in dataspace */ + hsize_t offset[H5O_LAYOUT_NDIMS]; /* Offset of element in dataspace */ hsize_t start[H5O_LAYOUT_NDIMS]; /* Location of start of hyperslab */ hsize_t end[H5O_LAYOUT_NDIMS]; /* Location of end of hyperslab */ - hsize_t temp_off; /* Offset in a given dimension */ + hsize_t temp_off; /* Offset in a given dimension */ uint8_t *lenp; /* pointer to length location for later storage */ uint32_t len = 0; /* number of bytes used */ + uint32_t version; /* Version number */ + uint8_t flags = 0; /* Flags for message */ hsize_t block_count; /* block counter for regular hyperslabs */ unsigned fast_dim; /* Rank of the fastest changing dimension for the dataspace */ unsigned ndims; /* Rank of the dataspace */ @@ -2092,15 +2130,25 @@ H5S_hyper_serialize(const H5S_t *space, uint8_t **p) FUNC_ENTER_NOAPI_NOINIT_NOERR - /* Check args */ HDassert(space); HDassert(p); HDassert(pp); + /* Calculate version */ + if(space->select.sel_info.hslab->unlim_dim >= 0) { + version = 2; + flags |= H5S_SELECT_FLAG_UNLIM; + } /* end if */ + else + version = 1; + /* Store the preamble information */ UINT32ENCODE(pp, (uint32_t)H5S_GET_SELECT_TYPE(space)); /* Store the type of selection */ - UINT32ENCODE(pp, (uint32_t)1); /* Store the version number */ - UINT32ENCODE(pp, (uint32_t)0); /* Store the un-used padding */ + UINT32ENCODE(pp, version); /* Store the version number */ + if(version >= 2) + *(pp)++ = flags; /* Store the flags */ + else + UINT32ENCODE(pp, (uint32_t)0); /* Store the un-used padding */ lenp = pp; /* keep the pointer to the length location for later */ pp += 4; /* skip over space for length */ @@ -2108,8 +2156,23 @@ H5S_hyper_serialize(const H5S_t *space, uint8_t **p) UINT32ENCODE(pp, (uint32_t)space->extent.rank); len += 4; + /* If there is an unlimited dimension, only encode opt_unlim_diminfo */ + if(flags & H5S_SELECT_FLAG_UNLIM) { + unsigned i; + + HDassert(H5S_UNLIMITED == HSIZE_UNDEF); + + /* Iterate over dimensions */ + for(i = 0; i < space->extent.rank; i++) { + /* Encode start/stride/block/count */ + UINT64ENCODE(pp, space->select.sel_info.hslab->opt_diminfo[i].start); + UINT64ENCODE(pp, space->select.sel_info.hslab->opt_diminfo[i].stride); + UINT64ENCODE(pp, space->select.sel_info.hslab->opt_diminfo[i].count); + UINT64ENCODE(pp, space->select.sel_info.hslab->opt_diminfo[i].block); + } /* end for */ + } /* end if */ /* Check for a "regular" hyperslab selection */ - if(space->select.sel_info.hslab->diminfo_valid) { + else if(space->select.sel_info.hslab->diminfo_valid) { unsigned u; /* Local counting variable */ /* Set some convienence values */ @@ -2209,8 +2272,7 @@ H5S_hyper_serialize(const H5S_t *space, uint8_t **p) len += (uint32_t)(8 * space->extent.rank * block_count); /* Encode each hyperslab in selection */ - *p = pp; - H5S_hyper_serialize_helper(space->select.sel_info.hslab->span_lst, start, end, (hsize_t)0, p); + H5S_hyper_serialize_helper(space->select.sel_info.hslab->span_lst, start, end, (hsize_t)0, &pp); } /* end else */ /* Encode length */ @@ -2232,6 +2294,8 @@ H5S_hyper_serialize(const H5S_t *space, uint8_t **p) herr_t H5S_hyper_deserialize(space, p) H5S_t *space; IN/OUT: Dataspace pointer to place selection into + uint32_t version IN: Selection version + uint8_t flags IN: Selection flags uint8 **p; OUT: Pointer to buffer holding serialized selection. Will be advanced to end of serialized selection. @@ -2246,10 +2310,11 @@ H5S_hyper_serialize(const H5S_t *space, uint8_t **p) REVISION LOG --------------------------------------------------------------------------*/ static herr_t -H5S_hyper_deserialize(H5S_t *space, const uint8_t **p) +H5S_hyper_deserialize(H5S_t *space, uint32_t H5_ATTR_UNUSED version, uint8_t flags, + const uint8_t **p) { - const uint8_t *pp = (*p); /* Local pointer for decoding */ unsigned rank; /* rank of points */ + const uint8_t *pp = (*p); /* Local pointer for decoding */ size_t num_elem=0; /* number of elements in selection */ hsize_t start[H5O_LAYOUT_NDIMS]; /* hyperslab start information */ hsize_t end[H5O_LAYOUT_NDIMS]; /* hyperslab end information */ @@ -2274,32 +2339,54 @@ H5S_hyper_deserialize(H5S_t *space, const uint8_t **p) /* Deserialize slabs to select */ /* (The header and rank have already beed decoded) */ rank = space->extent.rank; /* Retrieve rank from space */ - UINT32DECODE(pp,num_elem); /* decode the number of points */ - /* Set the count & stride for all blocks */ - for(tcount=count,tstride=stride,j=0; j<rank; j++,tstride++,tcount++) { - *tcount=1; - *tstride=1; - } /* end for */ + /* If there is an unlimited dimension, only encode opt_unlim_diminfo */ + if(flags & H5S_SELECT_FLAG_UNLIM) { + HDassert(H5S_UNLIMITED == HSIZE_UNDEF); + HDassert(version >= 2); + + /* Iterate over dimensions */ + for(i = 0; i < space->extent.rank; i++) { + /* Decode start/stride/block/count */ + UINT64DECODE(pp, start[i]); + UINT64DECODE(pp, stride[i]); + UINT64DECODE(pp, count[i]); + UINT64DECODE(pp, block[i]); + } /* end for */ - /* Retrieve the coordinates from the buffer */ - for(i=0; i<num_elem; i++) { - /* Decode the starting points */ - for(tstart=start,j=0; j<rank; j++,tstart++) - UINT32DECODE(pp, *tstart); + /* Select the hyperslab to the current selection */ + if((ret_value = H5S_select_hyperslab(space, H5S_SELECT_SET, start, stride, count, block)) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection") + } /* end if */ + else { + /* decode the number of points */ + UINT32DECODE(pp,num_elem); - /* Decode the ending points */ - for(tend=end,j=0; j<rank; j++,tend++) - UINT32DECODE(pp, *tend); + /* Set the count & stride for all blocks */ + for(tcount = count, tstride = stride, j = 0; j < rank; j++, tstride++, tcount++) { + *tcount=1; + *tstride=1; + } /* end for */ - /* Change the ending points into blocks */ - for(tblock=block,tstart=start,tend=end,j=0; j<rank; j++,tstart++,tend++,tblock++) - *tblock=(*tend-*tstart)+1; + /* Retrieve the coordinates from the buffer */ + for(i = 0; i < num_elem; i++) { + /* Decode the starting points */ + for(tstart=start,j=0; j<rank; j++,tstart++) + UINT32DECODE(pp, *tstart); - /* Select or add the hyperslab to the current selection */ - if((ret_value=H5S_select_hyperslab(space,(i==0 ? H5S_SELECT_SET : H5S_SELECT_OR),start,stride,count,block))<0) - HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection") - } /* end for */ + /* Decode the ending points */ + for(tend = end, j = 0; j < rank; j++, tend++) + UINT32DECODE(pp, *tend); + + /* Change the ending points into blocks */ + for(tblock=block,tstart=start,tend=end,j=0; j<rank; j++,tstart++,tend++,tblock++) + *tblock=(*tend-*tstart)+1; + + /* Select or add the hyperslab to the current selection */ + if((ret_value=H5S_select_hyperslab(space,(i==0 ? H5S_SELECT_SET : H5S_SELECT_OR),start,stride,count,block))<0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection") + } /* end for */ + } /* end else */ /* Update decoding pointer */ *p = pp; @@ -2452,6 +2539,7 @@ H5S_get_select_hyper_blocklist(H5S_t *space, hbool_t internal, hsize_t startbloc HDassert(space); HDassert(buf); + HDassert(space->select.sel_info.hslab->unlim_dim < 0); /* Check for a "regular" hyperslab selection */ if(space->select.sel_info.hslab->diminfo_valid) { @@ -2475,11 +2563,19 @@ H5S_get_select_hyper_blocklist(H5S_t *space, hbool_t internal, hsize_t startbloc */ diminfo = space->select.sel_info.hslab->opt_diminfo; else - /* - * Use the "application dimension information" to pass back to the user - * the blocks they set, not the optimized, internal information. - */ - diminfo = space->select.sel_info.hslab->app_diminfo; + if(space->select.sel_info.hslab->unlim_dim >= 0) + /* + * There is an unlimited dimension so we must use opt_diminfo as + * it has been "clipped" to the current extent. + */ + diminfo = space->select.sel_info.hslab->opt_diminfo; + else + /* + * Use the "application dimension information" to pass back to + * the user the blocks they set, not the optimized, internal + * information. + */ + diminfo = space->select.sel_info.hslab->app_diminfo; /* Build the tables of count sizes as well as the initial offset */ for(u = 0; u < ndims; u++) { @@ -2616,6 +2712,8 @@ H5Sget_select_hyper_blocklist(hid_t spaceid, hsize_t startblock, HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data space") if(H5S_GET_SELECT_TYPE(space)!=H5S_SEL_HYPERSLABS) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a hyperslab selection") + if(space->select.sel_info.hslab->unlim_dim >= 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "cannot get blocklist for unlimited selection") /* Go get the correct number of blocks */ if(numblocks > 0) @@ -2758,7 +2856,10 @@ H5S_hyper_bounds(const H5S_t *space, hsize_t *start, hsize_t *end) start[i] = diminfo[i].start + (hsize_t)space->select.offset[i]; /* Compute the largest location in this dimension */ - end[i] = diminfo[i].start + diminfo[i].stride * (diminfo[i].count - 1) + (diminfo[i].block - 1) + (hsize_t)space->select.offset[i]; + if((int)i == space->select.sel_info.hslab->unlim_dim) + end[i] = H5S_UNLIMITED; + else + end[i] = diminfo[i].start + diminfo[i].stride * (diminfo[i].count - 1) + (diminfo[i].block - 1) + (hsize_t)space->select.offset[i]; } /* end for */ } /* end if */ else { @@ -2881,6 +2982,75 @@ done: /*-------------------------------------------------------------------------- NAME + H5S__hyper_unlim_dim + PURPOSE + Return unlimited dimension of selection, or -1 if none + USAGE + int H5S__hyper_unlim_dim(space) + H5S_t *space; IN: Dataspace pointer to check + RETURNS + Unlimited dimension of selection, or -1 if none (never fails). + DESCRIPTION + Returns the index of the unlimited dimension of the selection, or -1 + if the selection has no unlimited dimension. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +static int +H5S__hyper_unlim_dim(const H5S_t *space) +{ + FUNC_ENTER_STATIC_NOERR + + FUNC_LEAVE_NOAPI(space->select.sel_info.hslab->unlim_dim); +} /* end H5S__hyper_unlim_dim() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S_hyper_num_elem_non_unlim + PURPOSE + Return number of elements in the non-unlimited dimensions + USAGE + herr_t H5S_hyper_num_elem_non_unlim(space,num_elem_non_unlim) + H5S_t *space; IN: Dataspace pointer to check + hsize_t *num_elem_non_unlim; OUT: Number of elements in the non-unlimited dimensions + RETURNS + Non-negative on success/Negative on failure + DESCRIPTION + Returns the number of elements in a slice through the non-unlimited + dimensions of the selection. Fails if the selection has no unlimited + dimension. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +static herr_t +H5S_hyper_num_elem_non_unlim(const H5S_t *space, hsize_t *num_elem_non_unlim) +{ + herr_t ret_value = SUCCEED; + + FUNC_ENTER_NOAPI(FAIL) + + /* Sanity check */ + HDassert(space); + HDassert(num_elem_non_unlim); + + /* Get number of elements in the non-unlimited dimensions */ + if(space->select.sel_info.hslab->unlim_dim >= 0) + *num_elem_non_unlim = space->select.sel_info.hslab->num_elem_non_unlim; + else + HGOTO_ERROR(H5E_DATASPACE, H5E_BADVALUE, FAIL, "selection has no unlimited dimension") + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S_hyper_num_elem_non_unlim() */ + + +/*-------------------------------------------------------------------------- + NAME H5S_hyper_is_contiguous PURPOSE Check if a hyperslab selection is contiguous within the dataspace extent. @@ -3592,6 +3762,9 @@ H5S_hyper_add_span_element(H5S_t *space, unsigned rank, hsize_t *coords) /* Reset "regular" hyperslab flag */ space->select.sel_info.hslab->diminfo_valid = FALSE; + /* Set unlim_dim */ + space->select.sel_info.hslab->unlim_dim = -1; + /* Set # of elements in selection */ space->select.num_elem = 1; } /* end if */ @@ -4301,6 +4474,9 @@ H5S_hyper_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *off if(NULL == (new_space->select.sel_info.hslab = H5FL_MALLOC(H5S_hyper_sel_t))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate hyperslab info") + /* Set unlim_dim */ + new_space->select.sel_info.hslab->unlim_dim = -1; + /* Check for a "regular" hyperslab selection */ if(base_space->select.sel_info.hslab->diminfo_valid) { unsigned base_space_dim; /* Current dimension in the base dataspace */ @@ -6047,6 +6223,15 @@ H5S_hyper_generate_spans(H5S_t *space) /* Get the diminfo */ for(u=0; u<space->extent.rank; u++) { + /* Check for unlimited dimension and return error */ + /* These should be able to be converted to assertions once everything + * that calls this function checks for unlimited selections first + * (especially the new hyperslab API) -NAF */ + if(space->select.sel_info.hslab->opt_diminfo[u].count == H5S_UNLIMITED) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "can't generate spans with unlimited count") + if(space->select.sel_info.hslab->opt_diminfo[u].block == H5S_UNLIMITED) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "can't generate spans with unlimited block") + tmp_start[u]=space->select.sel_info.hslab->opt_diminfo[u].start; tmp_stride[u]=space->select.sel_info.hslab->opt_diminfo[u].stride; tmp_count[u]=space->select.sel_info.hslab->opt_diminfo[u].count; @@ -6334,6 +6519,7 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, const hsize_t *opt_count; /* Optimized count information */ const hsize_t *opt_block; /* Optimized block information */ unsigned u; /* Counters */ + int unlim_dim = -1; /* Unlimited dimension in selection, of -1 if none */ herr_t ret_value=SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) @@ -6352,6 +6538,18 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, if(block==NULL) block = _ones; + /* Check for unlimited dimension */ + for(u = 0; u<space->extent.rank; u++) + if((count[u] == H5S_UNLIMITED) || (block[u] == H5S_UNLIMITED)) { + if(unlim_dim >= 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "cannot have more than one unlimited dimension in selection") + else { + if(count[u] == block[u] /* == H5S_UNLIMITED */) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "count and block cannot both be unlimited") + unlim_dim = (int)u; + } /* end else */ + } /* end if */ + /* * Check new selection. */ @@ -6400,7 +6598,7 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, opt_block = int_block; for(u=0; u<space->extent.rank; u++) { /* contiguous hyperslabs have the block size equal to the stride */ - if(stride[u]==block[u]) { + if((stride[u] == block[u]) && (count[u] != H5S_UNLIMITED)) { int_count[u]=1; int_stride[u]=1; if(block[u]==1) @@ -6412,7 +6610,8 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, if(count[u]==1) int_stride[u]=1; else { - HDassert(stride[u] > block[u]); + HDassert((stride[u] > block[u]) || ((stride[u] == block[u]) + && (count[u] == H5S_UNLIMITED))); int_stride[u]=stride[u]; } /* end else */ int_count[u]=count[u]; @@ -6421,6 +6620,32 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, } /* end for */ } /* end else */ + /* Check for operating on unlimited selection */ + if((H5S_GET_SELECT_TYPE(space) == H5S_SEL_HYPERSLABS) + && (space->select.sel_info.hslab->unlim_dim >= 0) + && (op != H5S_SELECT_SET)) + { + /* Check for invalid operation */ + if(unlim_dim >= 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "cannot modify unlimited selection with another unlimited selection") + if(!((op == H5S_SELECT_AND) || (op == H5S_SELECT_NOTA))) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "unsupported operation on unlimited selection") + HDassert(space->select.sel_info.hslab->diminfo_valid); + + /* Clip unlimited selection to include new selection */ + if(H5S_hyper_clip_unlim(space, + start[space->select.sel_info.hslab->unlim_dim] + + ((opt_count[space->select.sel_info.hslab->unlim_dim] + - (hsize_t)1) + * opt_stride[space->select.sel_info.hslab->unlim_dim]) + + opt_block[space->select.sel_info.hslab->unlim_dim]) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCLIP, FAIL, "failed to clip unlimited selection") + + /* If an empty space was returned it must be "none" */ + HDassert((space->select.num_elem > (hsize_t)0) + || (space->select.type->type == H5S_SEL_NONE)); + } /* end if */ + /* Fixup operation for non-hyperslab selections */ switch(H5S_GET_SELECT_TYPE(space)) { case H5S_SEL_NONE: /* No elements selected in dataspace */ @@ -6540,16 +6765,64 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, space->select.num_elem *= (opt_count[u] * opt_block[u]); } /* end for */ + /* Save unlim_dim */ + space->select.sel_info.hslab->unlim_dim = unlim_dim; + /* Indicate that the dimension information is valid */ space->select.sel_info.hslab->diminfo_valid = TRUE; /* Indicate that there's no slab information */ space->select.sel_info.hslab->span_lst = NULL; + + /* Handle unlimited selections */ + if(unlim_dim >= 0) { + /* Calculate num_elem_non_unlim */ + space->select.sel_info.hslab->num_elem_non_unlim = (hsize_t)1; + for(u = 0; u < space->extent.rank; u++) + if((int)u != unlim_dim) + space->select.sel_info.hslab->num_elem_non_unlim *= (opt_count[u] * opt_block[u]); + + /* Set num_elem */ + if(space->select.num_elem != (hsize_t)0) + space->select.num_elem = H5S_UNLIMITED; + } /* end if */ } /* end if */ else if(op >= H5S_SELECT_OR && op <= H5S_SELECT_NOTA) { /* Sanity check */ HDassert(H5S_GET_SELECT_TYPE(space) == H5S_SEL_HYPERSLABS); + /* Handle unlimited selections */ + if(unlim_dim >= 0) { + hsize_t bounds_start[H5S_MAX_RANK]; + hsize_t bounds_end[H5S_MAX_RANK]; + hsize_t tmp_count = opt_count[unlim_dim]; + hsize_t tmp_block = opt_block[unlim_dim]; + + /* Check for invalid operation */ + if(space->select.sel_info.hslab->unlim_dim >= 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "cannot modify unlimited selection with another unlimited selection") + if(!((op == H5S_SELECT_AND) || (op == H5S_SELECT_NOTB))) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "unsupported operation with unlimited selection") + + /* Get bounds of existing selection */ + if(H5S_hyper_bounds(space, bounds_start, bounds_end) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "can't get selection bounds") + + /* Patch count and block to remove unlimited and include the + * existing selection */ + H5S__hyper_get_clip_diminfo(start[unlim_dim], opt_stride[unlim_dim], &tmp_count, &tmp_block, bounds_end[unlim_dim] + (hsize_t)1); + HDassert((tmp_count == 1) || (opt_count != _ones)); + HDassert((tmp_block == 1) || (opt_block != _ones)); + if(opt_count != _ones) { + HDassert(opt_count == int_count); + int_count[unlim_dim] = tmp_count; + } /* end if */ + if(opt_block != _ones) { + HDassert(opt_block == int_block); + int_block[unlim_dim] = tmp_block; + } /* end if */ + } /* end if */ + /* Check if there's no hyperslab span information currently */ if(NULL == space->select.sel_info.hslab->span_lst) if(H5S_hyper_generate_spans(space) < 0) @@ -6896,6 +7169,9 @@ H5S_generate_hyperslab (H5S_t *space, H5S_seloper_t op, /* Allocate space for the hyperslab selection information */ if((space->select.sel_info.hslab=H5FL_MALLOC(H5S_hyper_sel_t))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate hyperslab info") + + /* Set unlim_dim */ + space->select.sel_info.hslab->unlim_dim = -1; } /* end if */ /* Combine tmp_space (really space) & new_space, with the result in space */ @@ -6943,6 +7219,7 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, const hsize_t *opt_count; /* Optimized count information */ const hsize_t *opt_block; /* Optimized block information */ unsigned u; /* Counters */ + int unlim_dim = -1; /* Unlimited dimension in selection, of -1 if none */ herr_t ret_value=SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(FAIL) @@ -6961,6 +7238,18 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, if(block==NULL) block = _ones; + /* Check for unlimited dimension */ + for(u = 0; u<space->extent.rank; u++) + if((count[u] == H5S_UNLIMITED) || (block[u] == H5S_UNLIMITED)) { + if(unlim_dim >= 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "cannot have more than one unlimited dimension in selection") + else { + if(count[u] == block[u] /* == H5S_UNLIMITED */) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "count and block cannot both be unlimited") + unlim_dim = (int)u; + } /* end else */ + } /* end if */ + /* * Check new selection. */ @@ -7005,7 +7294,7 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, opt_block = int_block; for(u=0; u<space->extent.rank; u++) { /* contiguous hyperslabs have the block size equal to the stride */ - if(stride[u]==block[u]) { + if((stride[u] == block[u]) && (count[u] != H5S_UNLIMITED)) { int_count[u]=1; int_stride[u]=1; if(block[u]==1) @@ -7017,7 +7306,8 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, if(count[u]==1) int_stride[u]=1; else { - HDassert(stride[u] > block[u]); + HDassert((stride[u] > block[u]) || ((stride[u] == block[u]) + && (count[u] == H5S_UNLIMITED))); int_stride[u]=stride[u]; } /* end else */ int_count[u]=count[u]; @@ -7026,6 +7316,32 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, } /* end for */ } /* end else */ + /* Check for operating on unlimited selection */ + if((H5S_GET_SELECT_TYPE(space) == H5S_SEL_HYPERSLABS) + && (space->select.sel_info.hslab->unlim_dim >= 0) + && (op != H5S_SELECT_SET)) + { + /* Check for invalid operation */ + if(unlim_dim >= 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "cannot modify unlimited selection with another unlimited selection") + if(!((op == H5S_SELECT_AND) || (op == H5S_SELECT_NOTA))) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "unsupported operation on unlimited selection") + HDassert(space->select.sel_info.hslab->diminfo_valid); + + /* Clip unlimited selection to include new selection */ + if(H5S_hyper_clip_unlim(space, + start[space->select.sel_info.hslab->unlim_dim] + + ((opt_count[space->select.sel_info.hslab->unlim_dim] + - (hsize_t)1) + * opt_stride[space->select.sel_info.hslab->unlim_dim]) + + opt_block[space->select.sel_info.hslab->unlim_dim]) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCLIP, FAIL, "failed to clip unlimited selection") + + /* If an empty space was returned it must be "none" */ + HDassert((space->select.num_elem > (hsize_t)0) + || (space->select.type->type == H5S_SEL_NONE)); + } /* end if */ + /* Fixup operation for non-hyperslab selections */ switch(H5S_GET_SELECT_TYPE(space)) { case H5S_SEL_NONE: /* No elements selected in dataspace */ @@ -7136,16 +7452,64 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op, space->select.num_elem*=(opt_count[u]*opt_block[u]); } /* end for */ + /* Save unlim_dim */ + space->select.sel_info.hslab->unlim_dim = unlim_dim; + /* Indicate that the dimension information is valid */ space->select.sel_info.hslab->diminfo_valid = TRUE; /* Indicate that there's no slab information */ space->select.sel_info.hslab->span_lst = NULL; + + /* Handle unlimited selections */ + if(unlim_dim >= 0) { + /* Calculate num_elem_non_unlim */ + space->select.sel_info.hslab->num_elem_non_unlim = (hsize_t)1; + for(u = 0; u < space->extent.rank; u++) + if((int)u != unlim_dim) + space->select.sel_info.hslab->num_elem_non_unlim *= (opt_count[u] * opt_block[u]); + + /* Set num_elem */ + if(space->select.num_elem != (hsize_t)0) + space->select.num_elem = H5S_UNLIMITED; + } /* end if */ } /* end if */ else if(op>=H5S_SELECT_OR && op<=H5S_SELECT_NOTA) { /* Sanity check */ HDassert(H5S_GET_SELECT_TYPE(space) == H5S_SEL_HYPERSLABS); + /* Handle unlimited selections */ + if(unlim_dim >= 0) { + hsize_t bounds_start[H5S_MAX_RANK]; + hsize_t bounds_end[H5S_MAX_RANK]; + hsize_t tmp_count = opt_count[unlim_dim]; + hsize_t tmp_block = opt_block[unlim_dim]; + + /* Check for invalid operation */ + if(space->select.sel_info.hslab->unlim_dim >= 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "cannot modify unlimited selection with another unlimited selection") + if(!((op == H5S_SELECT_AND) || (op == H5S_SELECT_NOTB))) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNSUPPORTED, FAIL, "unsupported operation with unlimited selection") + + /* Get bounds of existing selection */ + if(H5S_hyper_bounds(space, bounds_start, bounds_end) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "can't get selection bounds") + + /* Patch count and block to remove unlimited and include the + * existing selection */ + H5S__hyper_get_clip_diminfo(start[unlim_dim], opt_stride[unlim_dim], &tmp_count, &tmp_block, bounds_end[unlim_dim] + (hsize_t)1); + HDassert((tmp_count == 1) || (opt_count != _ones)); + HDassert((tmp_block == 1) || (opt_block != _ones)); + if(opt_count != _ones) { + HDassert(opt_count == int_count); + int_count[unlim_dim] = tmp_count; + } /* end if */ + if(opt_block != _ones) { + HDassert(opt_block == int_block); + int_block[unlim_dim] = tmp_block; + } /* end if */ + } /* end if */ + /* Check if there's no hyperslab span information currently */ if(NULL == space->select.sel_info.hslab->span_lst) if(H5S_hyper_generate_spans(space) < 0) @@ -7351,6 +7715,9 @@ H5S_combine_select (H5S_t *space1, H5S_seloper_t op, H5S_t *space2) if((new_space->select.sel_info.hslab=H5FL_CALLOC(H5S_hyper_sel_t))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "can't allocate hyperslab info") + /* Set unlim_dim */ + new_space->select.sel_info.hslab->unlim_dim = -1; + /* Combine space1 & space2, with the result in new_space */ if(H5S_operate_hyperslab(new_space,space1->select.sel_info.hslab->span_lst,op,space2->select.sel_info.hslab->span_lst,FALSE,&span2_owned)<0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCLIP, NULL, "can't clip hyperslab information") @@ -7480,6 +7847,9 @@ H5S_select_select (H5S_t *space1, H5S_seloper_t op, H5S_t *space2) if((space1->select.sel_info.hslab=H5FL_CALLOC(H5S_hyper_sel_t))==NULL) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate hyperslab info") + /* Set unlim_dim */ + space1->select.sel_info.hslab->unlim_dim = -1; + /* Combine tmp_spans (from space1) & spans from space2, with the result in space1 */ if(H5S_operate_hyperslab(space1,tmp_spans,op,space2->select.sel_info.hslab->span_lst,FALSE,&span2_owned)<0) HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCLIP, FAIL, "can't clip hyperslab information") @@ -8752,6 +9122,7 @@ H5S_hyper_get_seq_list(const H5S_t *space, unsigned H5_ATTR_UNUSED flags, H5S_se HDassert(nelem); HDassert(off); HDassert(len); + HDassert(space->select.sel_info.hslab->unlim_dim < 0); /* Check for the special case of just one H5Sselect_hyperslab call made */ if(space->select.sel_info.hslab->diminfo_valid) { @@ -8881,6 +9252,1085 @@ H5S_hyper_get_seq_list(const H5S_t *space, unsigned H5_ATTR_UNUSED flags, H5S_se /*-------------------------------------------------------------------------- NAME + H5S__hyper_project_intersection + PURPOSE + Projects the intersection of of the selections of src_space and + src_intersect_space within the selection of src_space as a selection + within the selection of dst_space + USAGE + herr_t H5S__hyper_project_intersection(src_space,dst_space,src_intersect_space,proj_space) + H5S_t *src_space; IN: Selection that is mapped to dst_space, and intersected with src_intersect_space + H5S_t *dst_space; IN: Selection that is mapped to src_space, and which contains the result + H5S_t *src_intersect_space; IN: Selection whose intersection with src_space is projected to dst_space to obtain the result + H5S_t *proj_space; OUT: Will contain the result (intersection of src_intersect_space and src_space projected from src_space to dst_space) after the operation + RETURNS + Non-negative on success/Negative on failure. + DESCRIPTION + Projects the intersection of of the selections of src_space and + src_intersect_space within the selection of src_space as a selection + within the selection of dst_space. The result is placed in the + selection of proj_space. Note src_space, dst_space, and + src_intersect_space do not need to use hyperslab selections, but they + cannot use point selections. The result is always a hyperslab + selection. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +herr_t +H5S__hyper_project_intersection(const H5S_t *src_space, const H5S_t *dst_space, + const H5S_t *src_intersect_space, H5S_t *proj_space) +{ + hsize_t ss_off[H5S_PROJECT_INTERSECT_NSEQS]; /* Offset array for src_space */ + size_t ss_len[H5S_PROJECT_INTERSECT_NSEQS]; /* Length array for src_space */ + size_t ss_nseq; /* Number of sequences for src_space */ + size_t ss_nelem; /* Number of elements for src_space */ + size_t ss_i = (size_t)0; /* Index into offset/length arrays for src_space */ + hbool_t advance_ss = FALSE; /* Whether to advance ss_i on the next iteration */ + H5S_sel_iter_t ss_iter; /* Selection iterator for src_space */ + hbool_t ss_iter_init = FALSE; /* Whether ss_iter is initialized */ + hsize_t ss_sel_off = (hsize_t)0; /* Offset within src_space selection */ + hsize_t ds_off[H5S_PROJECT_INTERSECT_NSEQS]; /* Offset array for dst_space */ + size_t ds_len[H5S_PROJECT_INTERSECT_NSEQS]; /* Length array for dst_space */ + size_t ds_nseq; /* Number of sequences for dst_space */ + size_t ds_nelem; /* Number of elements for dst_space */ + size_t ds_i = (size_t)0; /* Index into offset/length arrays for dst_space */ + H5S_sel_iter_t ds_iter; /* Selection iterator for dst_space */ + hbool_t ds_iter_init = FALSE; /* Whether ds_iter is initialized */ + hsize_t ds_sel_off = (hsize_t)0; /* Offset within dst_space selection */ + hsize_t sis_off[H5S_PROJECT_INTERSECT_NSEQS]; /* Offset array for src_intersect_space */ + size_t sis_len[H5S_PROJECT_INTERSECT_NSEQS]; /* Length array for src_intersect_space */ + size_t sis_nseq; /* Number of sequences for src_intersect_space */ + size_t sis_nelem; /* Number of elements for src_intersect_space */ + size_t sis_i = (size_t)0; /* Index into offset/length arrays for src_intersect_space */ + hbool_t advance_sis = FALSE; /* Whether to advance sis_i on the next iteration */ + H5S_sel_iter_t sis_iter; /* Selection iterator for src_intersect_space */ + hbool_t sis_iter_init = FALSE; /* Whether sis_iter is initialized */ + hsize_t int_sel_off; /* Offset within intersected selections (ss/sis and ds/ps) */ + size_t int_len; /* Length of segment in intersected selections */ + hsize_t proj_off; /* Segment offset in proj_space */ + size_t proj_len; /* Segment length in proj_space */ + size_t proj_len_rem; /* Remaining length in proj_space for segment */ + hsize_t proj_down_dims[H5S_MAX_RANK]; /* "Down" dimensions in proj_space */ + H5S_hyper_span_info_t *curr_span_tree[H5S_MAX_RANK]; /* Current span tree being built (in each dimension) */ + H5S_hyper_span_t *prev_span[H5S_MAX_RANK]; /* Previous span in tree (in each dimension) */ + hsize_t curr_span_up_dim[H5S_MAX_RANK]; /* "Up" dimensions for current span */ + unsigned proj_rank; /* Rank of proj_space */ + hsize_t low; /* Low value of span */ + hsize_t high; /* High value of span */ + size_t span_len; /* Length of span */ + size_t nelem; /* Number of elements returned for get_seq_list op */ + unsigned i; /* Local index variable */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_PACKAGE + + /* Check parameters */ + HDassert(src_space); + HDassert(dst_space); + HDassert(src_intersect_space); + HDassert(proj_space); + + /* Assert that src_space and src_intersect_space have same extent and there + * are no point selections */ + HDassert(H5S_GET_EXTENT_NDIMS(src_space) + == H5S_GET_EXTENT_NDIMS(src_intersect_space)); + HDassert(!HDmemcmp(src_space->extent.size, src_intersect_space->extent.size, + (size_t)H5S_GET_EXTENT_NDIMS(src_space) + * sizeof(src_space->extent.size[0]))); + HDassert(H5S_GET_SELECT_TYPE(src_space) != H5S_SEL_POINTS); + HDassert(H5S_GET_SELECT_TYPE(dst_space) != H5S_SEL_POINTS); + HDassert(H5S_GET_SELECT_TYPE(src_intersect_space) != H5S_SEL_POINTS); + + /* Initialize prev_space, curr_span_tree, and curr_span_up_dim */ + for(i = 0; i < H5S_MAX_RANK; i++) { + curr_span_tree[i] = NULL; + prev_span[i] = NULL; + curr_span_up_dim[i] = (hsize_t)0; + } /* end for */ + + /* Save rank of projected space */ + proj_rank = proj_space->extent.rank; + HDassert(proj_rank > 0); + + /* Get numbers of elements */ + ss_nelem = (size_t)H5S_GET_SELECT_NPOINTS(src_space); + ds_nelem = (size_t)H5S_GET_SELECT_NPOINTS(dst_space); + sis_nelem = (size_t)H5S_GET_SELECT_NPOINTS(src_intersect_space); + HDassert(ss_nelem == ds_nelem); + + /* Calculate proj_down_dims (note loop relies on unsigned i wrapping around) + */ + if(H5VM_array_down(proj_rank, proj_space->extent.size, proj_down_dims) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTSET, FAIL, "can't compute 'down' chunk size value") + + /* Remove current selection from proj_space */ + if(H5S_SELECT_RELEASE(proj_space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't release selection") + + /* If any selections are empty, skip to the end so "none" is selected */ + if((ss_nelem == 0) || (ds_nelem == 0) || (sis_nelem == 0)) + goto loop_end; + + /* Allocate space for the hyperslab selection information (note this sets + * diminfo_valid to FALSE, diminfo arrays to 0, and span list to NULL) */ + if((proj_space->select.sel_info.hslab = H5FL_CALLOC(H5S_hyper_sel_t)) == NULL) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't allocate hyperslab info") + + /* Set selection type */ + proj_space->select.type = H5S_sel_hyper; + + /* Set unlim_dim */ + proj_space->select.sel_info.hslab->unlim_dim = -1; + + /* Initialize source space iterator */ + if(H5S_select_iter_init(&ss_iter, src_space, (size_t)1) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "unable to initialize selection iterator") + ss_iter_init = TRUE; + + /* Get sequence list for source space */ + if(H5S_SELECT_GET_SEQ_LIST(src_space, 0u, &ss_iter, H5S_PROJECT_INTERSECT_NSEQS, ss_nelem, &ss_nseq, &nelem, ss_off, ss_len) < 0) + HGOTO_ERROR(H5E_INTERNAL, H5E_UNSUPPORTED, FAIL, "sequence length generation failed") + ss_nelem -= nelem; + HDassert(ss_nseq > 0); + + /* Initialize destination space iterator */ + if(H5S_select_iter_init(&ds_iter, dst_space, (size_t)1) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "unable to initialize selection iterator") + ds_iter_init = TRUE; + + /* Get sequence list for destination space */ + if(H5S_SELECT_GET_SEQ_LIST(dst_space, 0u, &ds_iter, H5S_PROJECT_INTERSECT_NSEQS, ds_nelem, &ds_nseq, &nelem, ds_off, ds_len) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "unable to initialize selection iterator") + ds_nelem -= nelem; + HDassert(ds_nseq > 0); + + /* Initialize source intersect space iterator */ + if(H5S_select_iter_init(&sis_iter, src_intersect_space, (size_t)1) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "unable to initialize selection iterator") + sis_iter_init = TRUE; + + /* Get sequence list for source intersect space */ + if(H5S_SELECT_GET_SEQ_LIST(src_intersect_space, 0u, &sis_iter, H5S_PROJECT_INTERSECT_NSEQS, sis_nelem, &sis_nseq, &nelem, sis_off, sis_len) < 0) + HGOTO_ERROR(H5E_INTERNAL, H5E_UNSUPPORTED, FAIL, "sequence length generation failed") + sis_nelem -= nelem; + HDassert(sis_nseq > 0); + + /* Loop until we run out of sequences in either the source or source + * intersect space */ + while(1) { + while(advance_ss || (ss_off[ss_i] + ss_len[ss_i] <= sis_off[sis_i])) { + /* Either we finished the current source sequence or the + * sequences do not intersect. Advance source space. */ + ss_sel_off += (hsize_t)ss_len[ss_i]; + if(++ss_i == ss_nseq) { + if(ss_nelem > 0) { + /* Try to grab more sequences from src_space */ + if(H5S_SELECT_GET_SEQ_LIST(src_space, 0u, &ss_iter, H5S_PROJECT_INTERSECT_NSEQS, ss_nelem, &ss_nseq, &nelem, ss_off, ss_len) < 0) + HGOTO_ERROR(H5E_INTERNAL, H5E_UNSUPPORTED, FAIL, "sequence length generation failed") + HDassert(ss_len[0] > 0); + + /* Update ss_nelem */ + HDassert(nelem > 0); + HDassert(nelem <= ss_nelem); + ss_nelem -= nelem; + + /* Reset source space index */ + ss_i = 0; + } /* end if */ + else + /* There are no more sequences in src_space, so we can exit + * the loop. Use goto instead of break so we exit the outer + * loop. */ + goto loop_end; + } /* end if */ + + /* Reset advance_ss */ + advance_ss = FALSE; + } /* end if */ + if(advance_sis + || (sis_off[sis_i] + sis_len[sis_i] <= ss_off[ss_i])) { + do { + /* Either we finished the current source intersect sequence or + * the sequences do not intersect. Advance source intersect + * space. */ + if(++sis_i == sis_nseq) { + if(sis_nelem > 0) { + /* Try to grab more sequences from src_intersect_space + */ + if(H5S_SELECT_GET_SEQ_LIST(src_intersect_space, 0u, &sis_iter, H5S_PROJECT_INTERSECT_NSEQS, sis_nelem, &sis_nseq, &nelem, sis_off, sis_len) < 0) + HGOTO_ERROR(H5E_INTERNAL, H5E_UNSUPPORTED, FAIL, "sequence length generation failed") + HDassert(sis_len[0] > 0); + + /* Update ss_nelem */ + HDassert(nelem > 0); + HDassert(nelem <= sis_nelem); + sis_nelem -= nelem; + + /* Reset source space index */ + sis_i = 0; + } /* end if */ + else + /* There are no more sequences in src_intersect_space, + * so we can exit the loop. Use goto instead of break + * so we exit the outer loop. */ + goto loop_end; + } /* end if */ + } while(sis_off[sis_i] + sis_len[sis_i] <= ss_off[ss_i]); + + /* Reset advance_sis */ + advance_sis = FALSE; + } /* end if */ + else { + /* Sequences intersect, add intersection to projected space */ + /* Calculate intersection sequence in terms of offset within source + * selection and advance any sequences we complete */ + if(ss_off[ss_i] >= sis_off[sis_i]) + int_sel_off = ss_sel_off; + else + int_sel_off = sis_off[sis_i] - ss_off[ss_i] + ss_sel_off; + if((ss_off[ss_i] + (hsize_t)ss_len[ss_i]) <= (sis_off[sis_i] + + (hsize_t)sis_len[sis_i])) { + int_len = (size_t)((hsize_t)ss_len[ss_i] + ss_sel_off - int_sel_off); + advance_ss = TRUE; + } /* end if */ + else + int_len = (size_t)(sis_off[sis_i] + (hsize_t)sis_len[sis_i] - ss_off[ss_i] + ss_sel_off - int_sel_off); + if((ss_off[ss_i] + (hsize_t)ss_len[ss_i]) >= (sis_off[sis_i] + + (hsize_t)sis_len[sis_i])) + advance_sis = TRUE; + + /* Project intersection sequence to destination selection */ + while(int_len > (size_t)0) { + while(ds_sel_off + (hsize_t)ds_len[ds_i] <= int_sel_off) { + /* Intersection is not projected to this destination + * sequence, advance destination space */ + ds_sel_off += (hsize_t)ds_len[ds_i]; + if(++ds_i == ds_nseq) { + HDassert(ds_nelem > 0); + + /* Try to grab more sequences from dst_space */ + if(H5S_SELECT_GET_SEQ_LIST(dst_space, 0u, &ds_iter, H5S_PROJECT_INTERSECT_NSEQS, ds_nelem, &ds_nseq, &nelem, ds_off, ds_len) < 0) + HGOTO_ERROR(H5E_INTERNAL, H5E_UNSUPPORTED, FAIL, "sequence length generation failed") + HDassert(ds_len[0] > 0); + + /* Update ss_nelem */ + HDassert(nelem > 0); + HDassert(nelem <= ds_nelem); + ds_nelem -= nelem; + + /* Reset source space index */ + ds_i = 0; + } /* end if */ + } /* end while */ + + /* Add sequence to projected space */ + HDassert(ds_sel_off <= int_sel_off); + proj_off = ds_off[ds_i] + int_sel_off - ds_sel_off; + proj_len = proj_len_rem = (size_t)MIN(int_len, + (size_t)(ds_sel_off + (hsize_t)ds_len[ds_i] + - int_sel_off)); + + /* Add to span tree */ + while(proj_len_rem > (size_t)0) { + /* Check for more than one full row (in every dim) and + * append multiple spans at once? -NAF */ + /* Append spans in higher dimensions if we're going ouside + * the plane of the span currently being built (i.e. it's + * finished being built) */ + for(i = proj_rank - 1; ((i > 0) + && ((proj_off / proj_down_dims[i - 1]) + != curr_span_up_dim[i - 1])); i--) { + if(curr_span_tree[i]) { + HDassert(prev_span[i]); + + /* Append complete lower dimension span tree to + * current dimension */ + low = curr_span_up_dim[i - 1] % proj_space->extent.size[i - 1]; + if(H5S_hyper_append_span(&prev_span[i - 1], &curr_span_tree[i - 1], low, low, curr_span_tree[i], NULL) < 0) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTAPPEND, FAIL, "can't allocate hyperslab span") + + /* Reset lower dimension's span tree and previous + * span since we just committed it and will start + * over with a new one */ + if(H5S_hyper_free_span_info(curr_span_tree[i]) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTFREE, FAIL, "can't free span info") + curr_span_tree[i] = NULL; + prev_span[i] = NULL; + } /* end if */ + + /* Update curr_span_up_dim */ + curr_span_up_dim[i - 1] = proj_off / proj_down_dims[i - 1]; + } /* end for */ + + /* Compute bounds for new span in lowest dimension */ + low = proj_off % proj_space->extent.size[proj_rank - 1]; + span_len = MIN(proj_len_rem, + (size_t)(proj_space->extent.size[proj_rank - 1] + - low)); + HDassert(proj_len_rem >= span_len); + high = low + (hsize_t)span_len - (hsize_t)1; + + /* Append span in lowest dimension */ + if(H5S_hyper_append_span(&prev_span[proj_rank - 1], &curr_span_tree[proj_rank - 1], low, high, NULL, NULL) < 0) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTAPPEND, FAIL, "can't allocate hyperslab span") + + /* Update remaining offset and length */ + proj_off += (hsize_t)span_len; + proj_len_rem -= span_len; + } /* end while */ + + /* Update intersection sequence */ + int_sel_off += (hsize_t)proj_len; + int_len -= proj_len; + } /* end while */ + } /* end else */ + } /* end while */ + +loop_end: + /* Add remaining spans to span tree */ + for(i = proj_rank - 1; i > 0; i--) + if(curr_span_tree[i]) { + HDassert(prev_span[i]); + + /* Append remaining span tree to higher dimension */ + low = curr_span_up_dim[i - 1] % proj_space->extent.size[i - 1]; + if(H5S_hyper_append_span(&prev_span[i - 1], &curr_span_tree[i - 1], low, low, curr_span_tree[i], NULL) < 0) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTAPPEND, FAIL, "can't allocate hyperslab span") + + /* Reset span tree */ + if(H5S_hyper_free_span_info(curr_span_tree[i]) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTFREE, FAIL, "can't free span info") + curr_span_tree[i] = NULL; + } /* end if */ + + /* Add span tree to proj_space */ + if(curr_span_tree[0]) { + proj_space->select.sel_info.hslab->span_lst = curr_span_tree[0]; + curr_span_tree[0] = NULL; + + /* Set the number of elements in current selection */ + proj_space->select.num_elem = H5S_hyper_spans_nelem(proj_space->select.sel_info.hslab->span_lst); + + /* Attempt to rebuild "optimized" start/stride/count/block information. + * from resulting hyperslab span tree */ + if(H5S_hyper_rebuild(proj_space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOUNT, FAIL, "can't rebuild hyperslab info") + } /* end if */ + else + /* If we did not add anything to proj_space, select none instead */ + if(H5S_select_none(proj_space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't convert selection") + +done: + /* Release source selection iterator */ + if(ss_iter_init) + if(H5S_SELECT_ITER_RELEASE(&ss_iter) < 0) + HDONE_ERROR(H5E_DATASPACE, H5E_CANTRELEASE, FAIL, "unable to release selection iterator") + + /* Release destination selection iterator */ + if(ds_iter_init) + if(H5S_SELECT_ITER_RELEASE(&ds_iter) < 0) + HDONE_ERROR(H5E_DATASPACE, H5E_CANTRELEASE, FAIL, "unable to release selection iterator") + + /* Release source intersect selection iterator */ + if(sis_iter_init) + if(H5S_SELECT_ITER_RELEASE(&sis_iter) < 0) + HDONE_ERROR(H5E_DATASPACE, H5E_CANTRELEASE, FAIL, "unable to release selection iterator") + + /* Cleanup on error */ + if(ret_value < 0) { + /* Remove current selection from proj_space */ + if(H5S_SELECT_RELEASE(proj_space) < 0) + HDONE_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't release selection") + + /* Free span trees */ + for(i = 0; i < proj_rank; i++) + if(curr_span_tree[i]) { + if(H5S_hyper_free_span_info(curr_span_tree[i]) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTFREE, FAIL, "can't free span info") + curr_span_tree[i] = NULL; + } /* end if */ + } /* end if */ + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S__hyper_project_intersection() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S__hyper_subtract + PURPOSE + Subtract one hyperslab selection from another + USAGE + herr_t H5S__hyper_subtract(space,subtract_space) + H5S_t *space; IN/OUT: Selection to be operated on + H5S_t *subtract_space; IN: Selection that will be subtracted from space + RETURNS + Non-negative on success/Negative on failure. + DESCRIPTION + Removes any and all portions of space that are also present in + subtract_space. In essence, performs an A_NOT_B operation with the + two selections. + + Note this function basically duplicates a subset of the functionality + of H5S_select_select(). It should probably be removed when that + function is enabled. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +herr_t +H5S__hyper_subtract(H5S_t *space, H5S_t *subtract_space) +{ + H5S_hyper_span_info_t *a_not_b = NULL; /* Span tree for hyperslab spans in old span tree and not in new span tree */ + H5S_hyper_span_info_t *a_and_b = NULL; /* Span tree for hyperslab spans in both old and new span trees */ + H5S_hyper_span_info_t *b_not_a = NULL; /* Span tree for hyperslab spans in new span tree and not in old span tree */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + /* Check args */ + HDassert(space); + HDassert(subtract_space); + + /* Check that the space selections both have span trees */ + if(space->select.sel_info.hslab->span_lst == NULL) + if(H5S_hyper_generate_spans(space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNINITIALIZED, FAIL, "dataspace does not have span tree") + if(subtract_space->select.sel_info.hslab->span_lst == NULL) + if(H5S_hyper_generate_spans(subtract_space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_UNINITIALIZED, FAIL, "dataspace does not have span tree") + + /* Generate lists of spans which overlap and don't overlap */ + if(H5S_hyper_clip_spans(space->select.sel_info.hslab->span_lst, subtract_space->select.sel_info.hslab->span_lst, &a_not_b, &a_and_b, &b_not_a)<0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCLIP, FAIL, "can't clip hyperslab information") + + /* Reset the other dataspace selection information */ + if(H5S_SELECT_RELEASE(space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't release selection") + + /* Allocate space for the hyperslab selection information */ + if((space->select.sel_info.hslab = H5FL_CALLOC(H5S_hyper_sel_t)) == NULL) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate hyperslab info") + + /* Set unlim_dim */ + space->select.sel_info.hslab->unlim_dim = -1; + + /* Check for anything returned in a_not_b */ + if(a_not_b) { + /* Update spans in space */ + space->select.sel_info.hslab->span_lst = a_not_b; + a_not_b = NULL; + + /* Update number of elements */ + space->select.num_elem = H5S_hyper_spans_nelem(space->select.sel_info.hslab->span_lst); + + /* Attempt to rebuild "optimized" start/stride/count/block information. + * from resulting hyperslab span tree */ + if(H5S_hyper_rebuild(space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOUNT, FAIL, "can't rebuild hyperslab info") + } /* end if */ + else { + H5S_hyper_span_info_t *spans; /* Empty hyperslab span tree */ + + /* Set number of elements */ + space->select.num_elem = 0; + + /* Allocate a span info node */ + if(NULL == (spans = H5FL_MALLOC(H5S_hyper_span_info_t))) + HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't allocate hyperslab span") + + /* Set the reference count */ + spans->count = 1; + + /* Reset the scratch pad space */ + spans->scratch = 0; + + /* Set to empty tree */ + spans->head = NULL; + + /* Set pointer to empty span tree */ + space->select.sel_info.hslab->span_lst = spans; + } /* end if */ + +done: + /* Free span trees */ + if(a_and_b) + H5S_hyper_free_span_info(a_and_b); + if(b_not_a) + H5S_hyper_free_span_info(b_not_a); + if(a_not_b) { + HDassert(ret_value < 0); + H5S_hyper_free_span_info(b_not_a); + } /* end if */ + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S__hyper_subtract() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S__hyper_get_clip_diminfo + PURPOSE + Calculates the count and block required to clip the specified + unlimited dimension to include clip_size. The returned selection may + extent beyond clip_size. + USAGE + void H5S__hyper_get_clip_diminfo(start,stride,count,block,clip_size) + hsize_t start; IN: Start of hyperslab in unlimited dimension + hsize_t stride; IN: Stride of hyperslab in unlimited dimension + hsize_t *count; IN/OUT: Count of hyperslab in unlimited dimension + hsize_t *block; IN/OUT: Block of hyperslab in unlimited dimension + hsize_t clip_size; IN: Extent that hyperslab will be clipped to + RETURNS + Non-negative on success/Negative on failure. + DESCRIPTION + This function recalculates the internal description of the hyperslab + to make the unlimited dimension extend to the specified extent. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +void +H5S__hyper_get_clip_diminfo(hsize_t start, hsize_t stride, hsize_t *count, + hsize_t *block, hsize_t clip_size) +{ + FUNC_ENTER_PACKAGE_NOERR + + /* Check for selection outside clip size */ + if(start >= clip_size) { + if(*block == H5S_UNLIMITED) + *block = 0; + else + *count = 0; + } /* end if */ + /* Check for single block in unlimited dimension */ + else if((*block == H5S_UNLIMITED) || (*block == stride)) { + /* Calculate actual block size for this clip size */ + *block = clip_size - start; + *count = (hsize_t)1; + } /* end if */ + else { + HDassert(*count == H5S_UNLIMITED); + + /* Calculate initial count (last block may be partial) */ + *count = (clip_size - start + stride - (hsize_t)1) / stride; + HDassert(*count > (hsize_t)0); + } /* end else */ + + FUNC_LEAVE_NOAPI_VOID +} /* end H5S_hyper_get_clip_diminfo() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S_hyper_clip_unlim + PURPOSE + Clips the unlimited dimension of the hyperslab selection to the + specified size + USAGE + void H5S_hyper_clip_unlim(space,clip_size) + H5S_t *space, IN/OUT: Unlimited space to clip + hsize_t clip_size; IN: Extent that hyperslab will be clipped to + RETURNS + Non-negative on success/Negative on failure. + DESCRIPTION + This function changes the unlimited selection into a limited selection + with the extent of the formerly unlimited dimension specified by + * clip_size. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + Note this function does not take the offset into account. + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +herr_t +H5S_hyper_clip_unlim(H5S_t *space, hsize_t clip_size) +{ + H5S_hyper_sel_t *hslab; /* Convenience pointer to hyperslab info */ + hsize_t orig_count; /* Original count in unlimited dimension */ + int orig_unlim_dim; /* Original unliminted dimension */ + H5S_hyper_dim_t *diminfo; /* Convenience pointer to opt_diminfo in unlimited dimension */ + herr_t ret_value = SUCCEED; + + FUNC_ENTER_NOAPI(FAIL) + + /* Check parameters */ + HDassert(space); + hslab = space->select.sel_info.hslab; + HDassert(hslab); + HDassert(hslab->unlim_dim >= 0); + HDassert(!hslab->span_lst); + + /* Save original unlimited dimension */ + orig_unlim_dim = hslab->unlim_dim; + + diminfo = &hslab->opt_diminfo[orig_unlim_dim]; + + /* Save original count in unlimited dimension */ + orig_count = diminfo->count; + + /* Get initial diminfo */ + H5S__hyper_get_clip_diminfo(diminfo->start, diminfo->stride, &diminfo->count, &diminfo->block, clip_size); + + /* Selection is no longer unlimited */ + space->select.sel_info.hslab->unlim_dim = -1; + + /* Check for nothing returned */ + if((diminfo->block == 0) || (diminfo->count == 0)) { + /* Convert to "none" selection */ + if(H5S_select_none(space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't convert selection") + } /* end if */ + /* Check for single block in unlimited dimension */ + else if(orig_count == (hsize_t)1) { + /* Calculate number of elements */ + space->select.num_elem = diminfo->block * hslab->num_elem_non_unlim; + + /* Mark that opt_diminfo is valid */ + hslab->diminfo_valid = TRUE; + } /* end if */ + else { + /* Calculate number of elements */ + space->select.num_elem = diminfo->count * diminfo->block + * hslab->num_elem_non_unlim; + + /* Check if last block is partial. If superset is set, just keep the + * last block complete to speed computation. */ + HDassert(clip_size > diminfo->start); + if(((diminfo->stride * (diminfo->count - (hsize_t)1)) + diminfo->block) + > (clip_size - diminfo->start)) { + hsize_t start[H5S_MAX_RANK]; + hsize_t block[H5S_MAX_RANK]; + unsigned i; + + /* Last block is partial, need to construct compound selection */ + /* Fill start with zeros */ + HDmemset(start, 0, sizeof(start)); + + /* Set block to clip_size in unlimited dimension, H5S_MAX_SIZE in + * others so only unlimited dimension is clipped */ + for(i = 0; i < space->extent.rank; i++) + if((int)i == orig_unlim_dim) + block[i] = clip_size; + else + block[i] = H5S_MAX_SIZE; + + /* Generate span tree in selection */ + if(!hslab->span_lst) + if(H5S_hyper_generate_spans(space) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "unable to generate span tree") + + /* Indicate that the regular dimensions are no longer valid */ + hslab->diminfo_valid = FALSE; + + /* "And" selection with calculated block to perform clip operation + */ + if(H5S_generate_hyperslab(space, H5S_SELECT_AND, start, _ones, _ones, block) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINSERT, FAIL, "can't generate hyperslabs") + } /* end if */ + else + /* Last block is complete, simply mark that opt_diminfo is valid */ + hslab->diminfo_valid = TRUE; + } /* end else */ + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S_hyper_clip_unlim() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S__hyper_get_clip_extent_real + PURPOSE + Gets the extent a space should be clipped to in order to contain the + specified number of slices in the unlimited dimension + USAGE + hsize_t H5S__hyper_get_clip_extent_real(clip_space,num_slices,incl_trail) + const H5S_t *clip_space, IN: Space that clip size will be calculated based on + hsize_t num_slizes, IN: Number of slices clip_space should contain when clipped + hbool_t incl_trail; IN: Whether to include trailing unselected space + RETURNS + Clip extent to match num_slices (never fails) + DESCRIPTION + Calculates and returns the extent that clip_space should be clipped to + (via H5S_hyper_clip_unlim) in order for it to contain num_slices + slices in the unlimited dimension. If the clipped selection would end + immediately before a section of unselected space (i.e. at the end of a + block), then if incl_trail is TRUE, the returned clip extent is + selected to include that trailing "blank" space, otherwise it is + selected to end at the end before the blank space. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + Note this assumes the offset has been normalized. + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +static hsize_t +H5S__hyper_get_clip_extent_real(const H5S_t *clip_space, hsize_t num_slices, + hbool_t incl_trail) +{ + const H5S_hyper_dim_t *diminfo; /* Convenience pointer to opt_unlim_diminfo in unlimited dimension */ + hsize_t count; + hsize_t rem_slices; + hsize_t ret_value = 0; /* Return value */ + + FUNC_ENTER_STATIC_NOERR + + /* Check parameters */ + HDassert(clip_space); + HDassert(clip_space->select.sel_info.hslab); + HDassert(clip_space->select.sel_info.hslab->unlim_dim >= 0); + + diminfo = &clip_space->select.sel_info.hslab->opt_diminfo[clip_space->select.sel_info.hslab->unlim_dim]; + + if(num_slices == 0) + ret_value = incl_trail ? diminfo->start : 0; + else if((diminfo->block == H5S_UNLIMITED) + || (diminfo->block == diminfo->stride)) + /* Unlimited block, just set the extent large enough for the block size + * to match num_slices */ + ret_value = diminfo->start + num_slices; + else { + /* Unlimited count, need to match extent so a block (possibly) gets cut + * off so the number of slices matches num_slices */ + HDassert(diminfo->count == H5S_UNLIMITED); + + /* Calculate number of complete blocks in clip_space */ + count = num_slices / diminfo->block; + + /* Calculate slices remaining */ + rem_slices = num_slices - (count * diminfo->block); + + if(rem_slices > 0) + /* Must end extent in middle of partial block (or beginning of empty + * block if include_trailing_space and rem_slices == 0) */ + ret_value = diminfo->start + (count * diminfo->stride) + rem_slices; + else { + if(incl_trail) + /* End extent just before first missing block */ + ret_value = diminfo->start + (count * diminfo->stride); + else + /* End extent at end of last block */ + ret_value = diminfo->start + ((count - (hsize_t)1) + * diminfo->stride) + diminfo->block; + } /* end else */ + } /* end else */ + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S__hyper_get_clip_extent_real() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S_hyper_get_clip_extent + PURPOSE + Gets the extent a space should be clipped to in order to contain the + same number of elements as another space + USAGE + hsize_t H5S__hyper_get_clip_extent(clip_space,match_space,incl_trail) + const H5S_t *clip_space, IN: Space that clip size will be calculated based on + const H5S_t *match_space, IN: Space containing the same number of elements as clip_space should after clipping + hbool_t incl_trail; IN: Whether to include trailing unselected space + RETURNS + Calculated clip extent (never fails) + DESCRIPTION + Calculates and returns the extent that clip_space should be clipped to + (via H5S_hyper_clip_unlim) in order for it to contain the same number + of elements as match_space. If the clipped selection would end + immediately before a section of unselected space (i.e. at the end of a + block), then if incl_trail is TRUE, the returned clip extent is + selected to include that trailing "blank" space, otherwise it is + selected to end at the end before the blank space. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + Note this assumes the offset has been normalized. + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +hsize_t +H5S_hyper_get_clip_extent(const H5S_t *clip_space, const H5S_t *match_space, + hbool_t incl_trail) +{ + hsize_t num_slices; /* Number of slices in unlimited dimension */ + hsize_t ret_value = 0; /* Return value */ + + FUNC_ENTER_NOAPI(0) + + /* Check parameters */ + HDassert(clip_space); + HDassert(match_space); + HDassert(clip_space->select.sel_info.hslab->unlim_dim >= 0); + + /* Check for "none" match space */ + if(match_space->select.type->type == H5S_SEL_NONE) + num_slices = (hsize_t)0; + else { + HDassert(match_space->select.type->type == H5S_SEL_HYPERSLABS); + HDassert(match_space->select.sel_info.hslab); + + /* Calculate number of slices */ + num_slices = match_space->select.num_elem + / clip_space->select.sel_info.hslab->num_elem_non_unlim; + HDassert((match_space->select.num_elem + % clip_space->select.sel_info.hslab->num_elem_non_unlim) == 0); + } /* end else */ + + /* Call "real" get_clip_extent function */ + ret_value = H5S__hyper_get_clip_extent_real(clip_space, num_slices, incl_trail); + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S_hyper_get_clip_extent() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S_hyper_get_clip_extent_match + PURPOSE + Gets the extent a space should be clipped to in order to contain the + same number of elements as another unlimited space that has been + clipped to a different extent + USAGE + hsize_t H5S__hyper_get_clip_extent_match(clip_space,match_space,match_clip_size,incl_trail) + const H5S_t *clip_space, IN: Space that clip size will be calculated based on + const H5S_t *match_space, IN: Space that, after being clipped to match_clip_size, contains the same number of elements as clip_space should after clipping + hsize_t match_clip_size, IN: Extent match_space would be clipped to to match the number of elements in clip_space + hbool_t incl_trail; IN: Whether to include trailing unselected space + RETURNS + Calculated clip extent (never fails) + DESCRIPTION + Calculates and returns the extent that clip_space should be clipped to + (via H5S_hyper_clip_unlim) in order for it to contain the same number + of elements as match_space would have after being clipped to + match_clip_size. If the clipped selection would end immediately + before a section of unselected space (i.e. at the end of a block), + then if incl_trail is TRUE, the returned clip extent is selected to + include that trailing "blank" space, otherwise it is selected to end + at the end before the blank space. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + Note this assumes the offset has been normalized. + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +hsize_t +H5S_hyper_get_clip_extent_match(const H5S_t *clip_space, + const H5S_t *match_space, hsize_t match_clip_size, hbool_t incl_trail) +{ + const H5S_hyper_dim_t *match_diminfo; /* Convenience pointer to opt_unlim_diminfo in unlimited dimension in match_space */ + hsize_t count; /* Temporary count */ + hsize_t block; /* Temporary block */ + hsize_t num_slices; /* Number of slices in unlimited dimension */ + hsize_t ret_value = 0; /* Return value */ + + FUNC_ENTER_NOAPI(0) + + /* Check parameters */ + HDassert(clip_space); + HDassert(match_space); + HDassert(clip_space->select.sel_info.hslab); + HDassert(match_space->select.sel_info.hslab); + HDassert(clip_space->select.sel_info.hslab->unlim_dim >= 0); + HDassert(match_space->select.sel_info.hslab->unlim_dim >= 0); + HDassert(clip_space->select.sel_info.hslab->num_elem_non_unlim + == match_space->select.sel_info.hslab->num_elem_non_unlim); + + match_diminfo = &match_space->select.sel_info.hslab->opt_diminfo[match_space->select.sel_info.hslab->unlim_dim]; + + /* Get initial count and block */ + count = match_diminfo->count; + block = match_diminfo->block; + H5S__hyper_get_clip_diminfo(match_diminfo->start, match_diminfo->stride, &count, &block, match_clip_size); + + /* Calculate number of slices */ + /* Check for nothing returned */ + if((block == 0) || (count == 0)) + num_slices = (hsize_t)0; + /* Check for single block in unlimited dimension */ + else if(count == (hsize_t)1) + num_slices = block; + else { + /* Calculate initial num_slices */ + num_slices = block * count; + + /* Check for partial last block */ + HDassert(match_clip_size >= match_diminfo->start); + if(((match_diminfo->stride * (count - (hsize_t)1)) + block) + > (match_clip_size - match_diminfo->start)) { + /* Subtract slices missing from last block */ + HDassert((((match_diminfo->stride * (count - (hsize_t)1)) + block) + - (match_clip_size - match_diminfo->start)) < num_slices); + num_slices -= ((match_diminfo->stride * (count - (hsize_t)1)) + + block) - (match_clip_size - match_diminfo->start); + } /* end if */ + } /* end else */ + + /* Call "real" get_clip_extent function */ + ret_value = H5S__hyper_get_clip_extent_real(clip_space, num_slices, incl_trail); + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S_hyper_get_clip_extent_match() */ + + +/*-------------------------------------------------------------------------- + NAME + H5S_hyper_get_unlim_block + PURPOSE + Get the nth block in the unlimited dimension + USAGE + H5S_t *H5S_hyper_get_unlim_block(space,block_index) + const H5S_t *space, IN: Space with unlimited selection + hsize_t block_index, IN: Index of block to return in unlimited dimension + hbool_t incl_trail; IN: Whether to include trailing unselected space + RETURNS + New space on success/NULL on failure. + DESCRIPTION + Returns a space containing only the block_indexth block in the + unlimited dimension on space. All blocks in all other dimensions are + preserved. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + Note this assumes the offset has been normalized. + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +H5S_t * +H5S_hyper_get_unlim_block(const H5S_t *space, hsize_t block_index) +{ + H5S_hyper_sel_t *hslab; /* Convenience pointer to hyperslab info */ + H5S_t *space_out = NULL; + hsize_t start[H5S_MAX_RANK]; + hsize_t stride[H5S_MAX_RANK]; + hsize_t count[H5S_MAX_RANK]; + hsize_t block[H5S_MAX_RANK]; + unsigned i; + H5S_t *ret_value = NULL; + + FUNC_ENTER_NOAPI(NULL) + + /* Check parameters */ + HDassert(space); + hslab = space->select.sel_info.hslab; + HDassert(hslab); + HDassert(hslab->unlim_dim >= 0); + HDassert(hslab->opt_diminfo[hslab->unlim_dim].count == H5S_UNLIMITED); + + /* Set start to select block_indexth block in unlimited dimension and set + * count to 1 in that dimension to only select that block. Copy all other + * diminfo parameters. */ + for(i = 0; i < space->extent.rank; i++) { + if((int)i == hslab->unlim_dim){ + start[i] = hslab->opt_diminfo[i].start + (block_index + * hslab->opt_diminfo[i].stride); + count[i] = (hsize_t)1; + } /* end if */ + else { + start[i] = hslab->opt_diminfo[i].start; + count[i] = hslab->opt_diminfo[i].count; + } /* end else */ + stride[i] = hslab->opt_diminfo[i].stride; + block[i] = hslab->opt_diminfo[i].block; + } /* end for */ + + /* Create output space, copy extent */ + if(NULL == (space_out = H5S_create(H5S_SIMPLE))) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCREATE, NULL, "unable to create output dataspace") + if(H5S_extent_copy_real(&space_out->extent, &space->extent, TRUE) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOPY, NULL, "unable to copy destination space extent") + + /* Select block as defined by start/stride/count/block computed above */ + if(H5S_select_hyperslab(space_out, H5S_SELECT_SET, start, stride, count, block) < 0) + HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, NULL, "can't select hyperslab") + + /* Set return value */ + ret_value = space_out; + +done: + /* Free space on error */ + if(!ret_value) + if(space_out && H5S_close(space_out) < 0) + HDONE_ERROR(H5E_DATASPACE, H5E_CANTRELEASE, NULL, "unable to release dataspace") + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S_hyper_get_unlim_block */ + + +/*-------------------------------------------------------------------------- + NAME + H5S_hyper_get_first_inc_block + PURPOSE + Get the index of the first incomplete block in the specified extent + USAGE + hsize_t H5S_hyper_get_first_inc_block(space,clip_size,partial) + const H5S_t *space, IN: Space with unlimited selection + hsize_t clip_size, IN: Extent space would be clipped to + hbool_t *partial; OUT: Whether the ret_valueth block (first incomplete block) is partial + RETURNS + Index of first incomplete block in clip_size (never fails). + DESCRIPTION + Calculates and returns the index (as would be passed to + H5S_hyper_get_unlim_block()) of the first block in the unlimited + dimension of space which would be incomplete or missing when space is + clipped to clip_size. partial is set to TRUE if the first incomplete + block is partial, and FALSE if the first incomplete block is missing. + GLOBAL VARIABLES + COMMENTS, BUGS, ASSUMPTIONS + Note this assumes the offset has been normalized. + EXAMPLES + REVISION LOG +--------------------------------------------------------------------------*/ +hsize_t +H5S_hyper_get_first_inc_block(const H5S_t *space, hsize_t clip_size, + hbool_t *partial) +{ + H5S_hyper_sel_t *hslab; /* Convenience pointer to hyperslab info */ + H5S_hyper_dim_t *diminfo; /* Convenience pointer to opt_diminfo in unlimited dimension */ + hsize_t ret_value = 0; + + FUNC_ENTER_NOAPI(0) + + /* Check parameters */ + HDassert(space); + hslab = space->select.sel_info.hslab; + HDassert(hslab); + HDassert(hslab->unlim_dim >= 0); + HDassert(hslab->opt_diminfo[hslab->unlim_dim].count == H5S_UNLIMITED); + + diminfo = &hslab->opt_diminfo[hslab->unlim_dim]; + + /* Check for selection outside of clip_size */ + if(diminfo->start >= clip_size) { + ret_value = 0; + if(partial) + partial = FALSE; + } /* end if */ + else { + /* Calculate index of first incomplete block */ + ret_value = (clip_size - diminfo->start + diminfo->stride + - diminfo->block) / diminfo->stride; + + if(partial) { + /* Check for partial block */ + if((diminfo->stride * ret_value) < (clip_size - diminfo->start)) + *partial = TRUE; + else + *partial = FALSE; + } /* end if */ + } /* end else */ + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5S_hyper_get_first_inc_block */ + + +/*-------------------------------------------------------------------------- + NAME H5Sis_regular_hyperslab PURPOSE Determine if a hyperslab selection is regular |