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range_search_2d is faster now for counting queries #424

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range_search_2d is faster now for counting queries #424

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7 changes: 7 additions & 0 deletions include/sdsl/wt_int.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -651,6 +651,13 @@ class wt_int
size_type irb = ilb + (1ULL << (m_max_level-level));
size_type mid = (irb + ilb)>>1;

// the current range is [ilb,irb); thus, if it is entirely within the query range
// *and* no reporting is needed, we can simply take all the items and return
if ( not report and (vlb <= ilb and irb-1 <= vrb) ) {
cnt_answers+= (rb-lb+1);
return ;
}

size_type offset = offsets[level];

size_type ones_before_o = m_tree_rank(offset);
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