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# HG changeset patch
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# Parent ff6ad274f8ecb1715d366ddb53ecafd422252660
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do not insert new node if the whole range was shifted
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diff -r ff6ad274f8ec include/mdds/flat_segment_tree_def.inl
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34e3cc2 |
--- misc/mdds_0.3.0/inc/mdds/flat_segment_tree.hpp Thu Mar 24 14:54:16 2011 +0100
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+++ misc/build/mdds_0.3.0/inc/mdds/flat_segment_tree.hpp Thu Mar 24 14:55:26 2011 +0100
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@@ -430,16 +430,25 @@
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if (m_left_leaf->value_leaf.value != m_init_val)
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{
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- // The leftmost leaf node has a non-initial value. We need to
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- // insert a new node to carry that value after the shift.
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- node_ptr new_node(new node(true));
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- new_node->value_leaf.key = pos + size;
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- new_node->value_leaf.value = m_left_leaf->value_leaf.value;
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- m_left_leaf->value_leaf.value = m_init_val;
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- new_node->left = m_left_leaf;
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- new_node->right = m_left_leaf->right;
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- m_left_leaf->right->left = new_node;
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- m_left_leaf->right = new_node;
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+ if (size < m_right_leaf->value_leaf.key - m_left_leaf->value_leaf.key)
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+ {
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+ // The leftmost leaf node has a non-initial value. We need to
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+ // insert a new node to carry that value after the shift.
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+ node_ptr new_node(new node(true));
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+ new_node->value_leaf.key = pos + size;
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+ new_node->value_leaf.value = m_left_leaf->value_leaf.value;
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+ m_left_leaf->value_leaf.value = m_init_val;
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+ new_node->left = m_left_leaf;
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+ new_node->right = m_left_leaf->right;
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+ m_left_leaf->right->left = new_node;
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+ m_left_leaf->right = new_node;
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+ }
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+ else
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+ {
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+ // We shifted out the whole range, so there would be no new
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+ // node inserted. Just set default value.
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+ m_left_leaf->value_leaf.value = m_init_val;
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+ }
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}
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m_valid_tree = false;
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