intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 74 insertions, 0 deletions

diff --git a/contrib/libs/hyperscan/src/nfagraph/ng_uncalc_components.h b/contrib/libs/hyperscan/src/nfagraph/ng_uncalc_components.h
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+++ b/contrib/libs/hyperscan/src/nfagraph/ng_uncalc_components.h
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+/*
+ * Copyright (c) 2015-2016, 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 NFA graph merging ("uncalc")
+ */
+
+#ifndef NG_UNCALC_COMPONENTS_H
+#define NG_UNCALC_COMPONENTS_H
+
+#include <map>
+#include <vector>
+
+namespace ue2 {
+
+struct CompileContext;
+struct Grey;
+class NGHolder;
+class ReportManager;
+
+/**
+ * \brief Returns the common prefix length for a pair of graphs.
+ *
+ * The CPL is calculated based the topological ordering given by the state
+ * indices for each graph.
+ */
+u32 commonPrefixLength(const NGHolder &ga, const NGHolder &gb);
+
+/**
+ * \brief Merge the group of graphs in \p cluster where possible.
+ *
+ * The (from, to) mapping of merged graphs is returned.
+ */
+std::map<NGHolder *, NGHolder *>
+mergeNfaCluster(const std::vector<NGHolder *> &cluster, const ReportManager *rm,
+                const CompileContext &cc);
+
+/**
+ * \brief Merge graph \p ga into graph \p gb.
+ *
+ * Returns false on failure. On success, \p gb is reduced via \ref
+ * reduceImplementableGraph and renumbered.
+ */
+bool mergeNfaPair(const NGHolder &ga, NGHolder &gb, const ReportManager *rm,
+                  const CompileContext &cc);
+
+} // namespace ue2
+
+#endif