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      <dt style="clear: both; float: left; font-weight: bold; width: 8em">Author</dt>
      <dd style="margin-left: 8.5em">susumu.yata &lt;susum****@gmail*****&gt;</dd>
      <dt style="clear: both; float: left; font-weight: bold; width: 8em">Date</dt>
      <dd style="margin-left: 8.5em">2013-06-25 12:46:38 +0900 (Tue, 25 Jun 2013)</dd>
      <dt style="clear: both; float: left; font-weight: bold; width: 8em">New Revision</dt>
      <dd style="margin-left: 8.5em"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18">251b43b12b1c9df0468ce6eb5f91f3f3373aba18</a></dd>
      <dt style="clear: both; float: left; font-weight: bold; width: 8em">Message</dt>
      <dd style="margin-left: 8.5em"><pre style="border: 1px solid #aaa; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; padding: 0.5em; width: auto">Improve grnxx::map::Patricia::add().</pre></dd>
      <dt style="clear: both; float: left; font-weight: bold; width: 8em">Modified files</dt>
      <dd style="margin-left: 8.5em">
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          <li><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#diff-0">lib/grnxx/map/patricia.cpp</a></li>
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<pre style="border: 0; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">  Modified: lib/grnxx/map/patricia.cpp (+35 -62)</span>
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<pre style="border: 0; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-line-number-hunk-header" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L213">...</a></span>
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<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L282">282</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L283">283</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L284">284</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L285">285</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L286">286</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L287">287</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L288">288</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L289">289</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L290">290</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L291">291</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L292">292</a></span>
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<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L294">294</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L295">295</a></span>
<span class="diff-line-number-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L296">296</a></span>
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<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L298">298</a></span>
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<span class="diff-line-number-hunk-header" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L300">...</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L301">301</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L302">302</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L303">303</a></span>
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<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L305">305</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L306">306</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0L307">307</a></span>
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<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0R214">214</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0R215">215</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0R216">216</a></span>
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<span class="diff-line-number-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0R217">217</a></span>
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<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0R279">279</a></span>
<span class="diff-line-number-not-changed" style="display: block; white-space: pre"><a href="https://github.com/groonga/grnxx/commit/251b43b12b1c9df0468ce6eb5f91f3f3373aba18#L0R280">280</a></span>
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            <td class="diff-content" style="border: 1px solid #aaa">
<pre style="border: 0; font-family: Consolas, Menlo, &quot;Liberation Mono&quot;, Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -214,35 +214,37 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">template &lt;typename T&gt;</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> bool Patricia&lt;T&gt;::add(KeyArg key, int64_t *key_id) {</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   const Key normalized_key = Helper&lt;T&gt;::normalize(key);</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   uint64_t node_id = ROOT_NODE_ID;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  Node * node;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  for (node = nodes_-&gt;get_pointer(node_id);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-       node &amp;&amp; (node-&gt;status() != NODE_LEAF);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-       node = nodes_-&gt;get_pointer(node_id)) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-    switch (node-&gt;status()) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-      case NODE_DEAD: {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        // The patricia is empty.</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        int64_t next_key_id;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        if (!keys_-&gt;add(normalized_key, &amp;next_key_id)) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          // Error.</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          return false;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        *node = Node::leaf_node(next_key_id);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        if (key_id) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          *key_id = next_key_id;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        return true;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-      }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-      case NODE_BRANCH: {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        node_id = node-&gt;offset() + get_ith_bit(normalized_key, node-&gt;bit_pos());</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        break;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-      }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-    }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  Node *node = nodes_-&gt;get_pointer(node_id);</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   if (!node) {</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     // Error.</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     return false;</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  // &quot;node&quot; points to a leaf node.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  if (node-&gt;status() == NODE_DEAD) {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    // The patricia is empty.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    int64_t next_key_id;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    if (!keys_-&gt;add(normalized_key, &amp;next_key_id)) {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+      // Error.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+      return false;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    *node = Node::leaf_node(next_key_id);</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    if (key_id) {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+      *key_id = next_key_id;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    return true;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  Node *history[(sizeof(Key) * 8) + 1];</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  int depth = 0;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  history[0] = node;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  while (node-&gt;status() != NODE_LEAF) {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    node_id = node-&gt;offset() + get_ith_bit(normalized_key, node-&gt;bit_pos());</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    node = nodes_-&gt;get_pointer(node_id);</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    if (!node) {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+      // Error.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+      return false;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    history[++depth] = node;</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  // Count the number of the common prefix bits.</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   Key stored_key;</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   if (!keys_-&gt;get_key(node-&gt;key_id(), &amp;stored_key)) {</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     // Error.</span>
<span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -256,44 +258,16 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">bool Patricia&lt;T&gt;::add(KeyArg key, int64_t *key_id) {</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre">     }</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     return false;</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  Node * const next_nodes = nodes_-&gt;get_pointer(header_-&gt;next_node_id);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  node_id = ROOT_NODE_ID;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  for (node = nodes_-&gt;get_pointer(node_id);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-       node &amp;&amp; (node-&gt;status() != NODE_LEAF);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-       node = nodes_-&gt;get_pointer(node_id)) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-    switch (node-&gt;status()) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-      case NODE_BRANCH: {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        if (count &lt;= node-&gt;bit_pos()) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          int64_t next_key_id;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          if (!keys_-&gt;add(normalized_key, &amp;next_key_id)) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-            // Error.</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-            return false;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          // Create a branch node.</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          if (get_ith_bit(normalized_key, count)) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-            next_nodes[0] = *node;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-            next_nodes[1] = Node::leaf_node(next_key_id);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          } else {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-            next_nodes[0] = Node::leaf_node(next_key_id);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-            next_nodes[1] = *node;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          *node = Node::branch_node(count, header_-&gt;next_node_id);</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          header_-&gt;next_node_id += 2;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          if (key_id) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-            *key_id = next_key_id;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          return true;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        node_id = node-&gt;offset();</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        if (node-&gt;bit_pos() &lt; count) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-          node_id += get_ith_bit(normalized_key, node-&gt;bit_pos());</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-        break;</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-      }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  // Find the branching point in &quot;history&quot;.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  while (depth &gt; 0) {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    if (history[depth - 1]-&gt;bit_pos() &lt; count) {</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+      break;</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+    --depth;</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  if (!node) {</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-    // Error.</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  node = history[depth];</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  Node * const next_nodes = nodes_-&gt;get_pointer(header_-&gt;next_node_id);</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+  if (!next_nodes) {</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     return false;</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   }</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   int64_t next_key_id;</span>
<span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -301,7 +275,6 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">bool Patricia&lt;T&gt;::add(KeyArg key, int64_t *key_id) {</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre">     // Error.</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     return false;</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   }</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">-  // Create a branch node.</span>
<span class="diff-not-changed" style="display: block; white-space: pre">   if (get_ith_bit(normalized_key, count)) {</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     next_nodes[0] = *node;</span>
<span class="diff-not-changed" style="display: block; white-space: pre">     next_nodes[1] = Node::leaf_node(next_key_id);</span>
</pre>
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