X-Git-Url: http://git.nguyen.vg/gitweb/?a=blobdiff_plain;f=libcds%2Fsrc%2Fstatic_sequence%2Fwt_node_internal.cpp;h=0232a73e01f6baa08a674c032ac73e7b7956109a;hb=f32808a35be7a1e62830a5972473178014fa44e5;hp=f5312db058ad0e55140b1cfde383e2b2c118e34f;hpb=317fdc10a3d537fd87b855c4b8714b2472cde608;p=SXSI%2FXMLTree.git diff --git a/libcds/src/static_sequence/wt_node_internal.cpp b/libcds/src/static_sequence/wt_node_internal.cpp index f5312db..0232a73 100644 --- a/libcds/src/static_sequence/wt_node_internal.cpp +++ b/libcds/src/static_sequence/wt_node_internal.cpp @@ -70,72 +70,67 @@ wt_node_internal::wt_node_internal(uint * symbols, uint n, uint l, wt_coder * c, delete [] right; } -// Deletes symbols array! -wt_node_internal::wt_node_internal(uchar * symbols, uint n, uint l, wt_coder * c, static_bitsequence_builder * bmb) { +wt_node_internal::wt_node_internal(uchar * symbols, uint n, uint l, wt_coder * c, static_bitsequence_builder * bmb, uint left, uint *done) { uint * ibitmap = new uint[n/W+1]; for(uint i=0;iis_set((uint)symbols[i],l)) + if(c->is_set((uint)symbols[i + left],l)) bitset(ibitmap,i); bitmap = bmb->build(ibitmap, n); - delete [] ibitmap; + delete [] ibitmap; + uint count_right = bitmap->rank1(n-1); - uint count_left = n-count_right+1; - uchar * left = new uchar[count_left+1]; - uchar * right = new uchar[count_right+1]; - count_right = count_left = 0; + uint count_left = n-count_right; + + for (uint i=0;iis_set(swap,l)) + j = bitmap->rank0(k)-1; + else + j = count_left + bitmap->rank1(k)-1; + uchar temp = symbols[j+left]; + symbols[j+left] = swap; + swap = temp; + set_field(done,1,k+left,1); + } + + while (get_field(done,1,i+left)) + ++i; + } + bool match_left = true, match_right = true; - for(uint i=0;iaccess(i)) { - right[count_right++]=symbols[i]; - if(count_right>1) - if(right[count_right-1]!=right[count_right-2]) - match_right = false; - } - else { - left[count_left++]=symbols[i]; - if(count_left>1) - if(left[count_left-1]!=left[count_left-2]) - match_left = false; - } - } + for (uint i=1; i < count_left; i++) + if (symbols[i+left] != symbols[i+left-1]) + match_left = false; + for (uint i=count_left + 1; i < n; i++) + if (symbols[i+left] != symbols[i+left-1]) + match_right = false; - delete [] symbols; - symbols = 0; if(count_left>0) { if(match_left/* && c->done(left[0],l+1)*/) - { - left_child = new wt_node_leaf((uint)left[0], count_left); - delete [] left; - left = 0; - } + left_child = new wt_node_leaf((uint)symbols[left], count_left); else - { - left_child = new wt_node_internal(left, count_left, l+1, c, bmb); - left = 0; // Already deleted - } + left_child = new wt_node_internal(symbols, count_left, l+1, c, bmb, left, done); } else { left_child = NULL; } if(count_right>0) { if(match_right/* && c->done(right[0],l+1)*/) - { - right_child = new wt_node_leaf((uint)right[0], count_right); - delete [] right; - right = 0; - } + right_child = new wt_node_leaf((uint)symbols[left+count_left], count_right); else - { - right_child = new wt_node_internal(right, count_right, l+1, c, bmb); - right = 0; // Already deleted - } + right_child = new wt_node_internal(symbols, count_right, l+1, c, bmb, left+count_left, done); } else { right_child = NULL; } -// delete [] left; // already deleted -// delete [] right; } @@ -159,6 +154,25 @@ uint wt_node_internal::rank(uint symbol, uint pos, uint l, wt_coder * c) { } } +// return value is rank of symbol (less or equal to the given symbol) that has rank > 0, +// the parameter symbol is updated accordinly +uint wt_node_internal::rankLessThan(uint &symbol, uint pos) +{ + uint result = -1; + using std::cout; + using std::endl; +// cout << "pos = " << pos << ", symbol = " << symbol << endl; + + if (pos == (uint)-1) + return (uint)-1; + if(right_child!=NULL) + result = right_child->rankLessThan(symbol, bitmap->rank1(pos)-1); + if(result == (uint)-1 && left_child!=NULL) + return left_child->rankLessThan(symbol, bitmap->rank0(pos)-1); + return result; +} + + uint wt_node_internal::select(uint symbol, uint pos, uint l, wt_coder * c) { bool is_set = c->is_set(symbol, l); uint ret = 0; @@ -190,6 +204,129 @@ uint wt_node_internal::access(uint pos) { } } +// Returns the value at given position and its rank +uint wt_node_internal::access(uint pos, uint &rank) +{ + bool is_set = bitmap->access(pos); + if(!is_set) + { + // recurse left + pos = bitmap->rank0(pos)-1; + return left_child->access(pos, rank); + } + else + { + // recurse right + pos = bitmap->rank1(pos)-1; + return right_child->access(pos, rank); + } +} + + +void wt_node_internal::access(vector &result, uint i, uint j, uint min, uint max, uint l, uint pivot) +{ + uint symbol = pivot | (1 << l); +// std::cout << "At l = " << l << ", [" << i << ", " << j << "], [" << min << ", " << max << "], symbol = " << symbol << std::endl; + + if (j < i || max < min) + return; + + if (min < symbol) + { + // Recurse left + uint newi = 0; + if (i > 0) + newi = bitmap->rank0(i - 1); + uint newj = bitmap->rank0(j); + + uint newmax = max < symbol - 1 ? max : symbol - 1; + if (left_child != NULL && newj > 0) + left_child->access(result, newi, newj-1, min, newmax, l-1, pivot); + } + + if (max >= symbol) + { + // Recurse right + uint newi = 0; + if (i > 0) + newi = bitmap->rank1(i - 1); + uint newj = bitmap->rank1(j); + + uint newmin = min > symbol ? min : symbol; + if (right_child != NULL && newj > 0) + right_child->access(result, newi, newj-1, newmin, max, l-1, symbol); + } +} + +void wt_node_internal::access(vector &result, uint i, uint j) +{ +// std::cout << "At l = " << l << ", [" << i << ", " << j << "], [" << min << ", " << max << "], symbol = " << symbol << std::endl; + + if (j < i) + return; + + { + // Recurse left + uint newi = 0; + if (i > 0) + newi = bitmap->rank0(i - 1); + uint newj = bitmap->rank0(j); + + if (left_child != NULL && newj > 0) + left_child->access(result, newi, newj-1); + } + + { + // Recurse right + uint newi = 0; + if (i > 0) + newi = bitmap->rank1(i - 1); + uint newj = bitmap->rank1(j); + + if (right_child != NULL && newj > 0) + right_child->access(result, newi, newj-1); + } +} + +// Count +uint wt_node_internal::access(uint i, uint j, uint min, uint max, uint l, uint pivot) +{ + uint count = 0; + uint symbol = pivot | (1 << l); +// std::cout << "At l = " << l << ", [" << i << ", " << j << "], [" << min << ", " << max << "], symbol = " << symbol << std::endl; + + if (j < i || max < min) + return 0; + + if (min < symbol) + { + // Recurse left + uint newi = 0; + if (i > 0) + newi = bitmap->rank0(i - 1); + uint newj = bitmap->rank0(j); + + uint newmax = max < symbol - 1 ? max : symbol - 1; + if (left_child != NULL && newj > 0) + count += left_child->access(newi, newj-1, min, newmax, l-1, pivot); + } + + if (max >= symbol) + { + // Recurse right + uint newi = 0; + if (i > 0) + newi = bitmap->rank1(i - 1); + uint newj = bitmap->rank1(j); + + uint newmin = min > symbol ? min : symbol; + if (right_child != NULL && newj > 0) + count += right_child->access(newi, newj-1, newmin, max, l-1, symbol); + } + return count; +} + + uint wt_node_internal::size() { uint s = bitmap->size()+sizeof(wt_node_internal); if(left_child!=NULL)