1 /* 2 * Copyright (c) 2015-2017, Intel Corporation 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * * Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * * Neither the name of Intel Corporation nor the names of its contributors 13 * may be used to endorse or promote products derived from this software 14 * without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /** \file 30 * \brief State numbering and late graph restructuring code. 31 */ 32 33 #ifndef NG_RESTRUCTURING_H 34 #define NG_RESTRUCTURING_H 35 36 #include "ng_holder.h" 37 #include "ue2common.h" 38 #include "util/flat_containers.h" 39 40 #include <unordered_map> 41 42 namespace ue2 { 43 44 /** 45 * \brief Special state index value meaning that the vertex will not 46 * participate in an (NFA/DFA/etc) implementation. 47 */ 48 static constexpr u32 NO_STATE = ~0; 49 50 /** 51 * \brief Gives each participating vertex in the graph a unique state index. 52 */ 53 std::unordered_map<NFAVertex, u32> 54 numberStates(NGHolder &h, const flat_set<NFAVertex> &tops); 55 56 /** 57 * \brief Counts the number of states (vertices with state indices) in the 58 * graph. 59 */ 60 u32 countStates(const std::unordered_map<NFAVertex, u32> &state_ids); 61 62 } // namespace ue2 63 64 #endif 65