tamarama: add container engine for exclusive nfas

Add the new Tamarama engine that acts as a container for infix/suffix
engines that can be proven to run exclusively of one another.

This reduces stream state for pattern sets with many exclusive engines.

src/util/clique.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2016, Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  * Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** \file
+ * \brief An algorithm to find cliques.
+ */
+
+#ifndef CLIQUE_H
+#define CLIQUE_H
+
+#include "ue2common.h"
+
+#include <vector>
+
+#include <boost/graph/adjacency_list.hpp>
+
+namespace ue2 {
+
+struct CliqueVertexProps {
+    CliqueVertexProps() {}
+    explicit CliqueVertexProps(u32 state_in) : stateId(state_in) {}
+
+    u32 stateId = ~0U;
+};
+
+typedef boost::adjacency_list<boost::listS, boost::listS, boost::undirectedS,
+                              CliqueVertexProps> CliqueGraph;
+typedef CliqueGraph::vertex_descriptor CliqueVertex;
+
+/** \brief Returns a vector of cliques found in a graph. */
+std::vector<std::vector<u32>> removeClique(CliqueGraph &cg);
+
+} // namespace ue2
+
+#endif