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ref:cde9a383711a11544ce7e107a78147fb96cc4029

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diff --git a/contrib/libs/hyperscan/src/nfagraph/ng_split.h b/contrib/libs/hyperscan/src/nfagraph/ng_split.h
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+/*
+ * Copyright (c) 2015-2017, 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 Functions for splitting NFAGraphs into LHS and RHS.
+ */
+
+#ifndef NG_SPLIT_H
+#define NG_SPLIT_H
+
+#include "ng_holder.h"
+
+#include <unordered_map>
+#include <vector>
+
+namespace ue2 {
+
+class NGHolder;
+
+/** Note: pivot should be a vertex that dominates acceptEod. Treating 'in'
+ * allocated to rhs if they are reachable from the pivot. Conversely, a vertex
+ * is in the lhs if it is reachable from start without going through the
+ * pivot. The pivot ends up in the LHS and any adjacent vertices in the RHS.
+ *
+ * Note: The RHS is setup to be triggered by TOP 0
+ *
+ * When multiple split vertices are provided:
+ * - RHS contains all vertices reachable from every pivot
+ * - LHS contains all vertices which are reachable from start ignoring any
+ *   vertices which have an edge to every pivot
+ */
+void splitGraph(const NGHolder &base, NFAVertex pivot, NGHolder *lhs,
+                std::unordered_map<NFAVertex, NFAVertex> *lhs_map,
+                NGHolder *rhs,
+                std::unordered_map<NFAVertex, NFAVertex> *rhs_map);
+
+void splitGraph(const NGHolder &base, const std::vector<NFAVertex> &pivots,
+                NGHolder *lhs,
+                std::unordered_map<NFAVertex, NFAVertex> *lhs_map,
+                NGHolder *rhs,
+                std::unordered_map<NFAVertex, NFAVertex> *rhs_map);
+
+void splitLHS(const NGHolder &base, NFAVertex pivot, NGHolder *lhs,
+              std::unordered_map<NFAVertex, NFAVertex> *lhs_map);
+
+void splitRHS(const NGHolder &base, const std::vector<NFAVertex> &pivots,
+              NGHolder *rhs, std::unordered_map<NFAVertex, NFAVertex> *rhs_map);
+
+} // namespace ue2
+
+#endif // NG_SPLIT_H