Initial commit of Hyperscan

src/nfa/goughcompile.h

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+/*
+ * Copyright (c) 2015, 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.
+ */
+
+#ifndef GOUGHCOMPILE_H
+#define GOUGHCOMPILE_H
+
+#include "mcclellancompile.h"
+#include "nfa_kind.h"
+#include "ue2common.h"
+#include "util/alloc.h"
+#include "util/ue2_containers.h"
+#include "util/order_check.h"
+
+#include <map>
+#include <memory>
+#include <set>
+#include <vector>
+
+namespace ue2 {
+
+#define CREATE_NEW_SOM (~0U)
+
+/* dest nfa state -> som info for dest state is min of provided loc idx som
+ * info */
+typedef flat_map<u32, std::vector<u32>> som_tran_info;
+
+struct som_report {
+    som_report(ReportID r, u32 s) : report(r), slot(s) {}
+
+    ReportID report;
+    u32 slot;
+
+    bool operator<(const som_report &b) const {
+        const som_report &a = *this;
+        ORDER_CHECK(report);
+        ORDER_CHECK(slot);
+        return false;
+    }
+};
+
+struct dstate_som {
+    std::set<som_report> reports;
+    std::set<som_report> reports_eod;
+    som_tran_info preds; /* live nfa states mapped back to pred states */
+};
+
+struct raw_som_dfa : public raw_dfa {
+    raw_som_dfa(nfa_kind k, bool unordered_som_triggers_in)
+        : raw_dfa(k), unordered_som_triggers(unordered_som_triggers_in) {
+        assert(!unordered_som_triggers || is_triggered(kind));
+    }
+
+    std::vector<dstate_som> state_som;
+    u32 stream_som_loc_width;
+    bool unordered_som_triggers;
+    void stripExtraEodReports(void) override;
+
+    std::map<u32, u32> new_som_nfa_states; /* map nfa vertex id -> offset */
+    u32 trigger_nfa_state; /* for triggered cases, slot_id that contains a new
+                            * som */
+};
+
+aligned_unique_ptr<NFA> goughCompile(raw_som_dfa &raw, u8 somPrecision,
+                                     const CompileContext &cc);
+
+} // namespace ue2
+
+#endif