H5S_COMBINE_HYPERSLAB combines a hyperslab selection specified by start , stride , count and block with the current selection for the dataspace space_id , creating a new dataspace to return the generated selection. If the current selection is not a hyperslab, it is freed and the hyperslab parameters passed in are combined with the H5S_SEL_ALL hyperslab (ie. a selection composing the entire current extent). If either stride or block is NULL, then it will be set to 1 .
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