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 Execute an NFA over a given input, returning the set of states that
31 * are active afterwards.
32 */
33
34#ifndef NG_EXECUTE_H
35#define NG_EXECUTE_H
36
37#include "ng_holder.h"
38#include "util/flat_containers.h"
39
40#include <vector>
41
42namespace ue2 {
43
44class CharReach;
45struct ue2_literal;
46
47flat_set<NFAVertex> execute_graph(const NGHolder &g, const ue2_literal &input,
48 const flat_set<NFAVertex> &initial,
49 bool kill_sds = false);
50
51flat_set<NFAVertex> execute_graph(const NGHolder &g,
52 const std::vector<CharReach> &input,
53 const flat_set<NFAVertex> &initial);
54
55/** on exit, states contains any state which may still be enabled after
56 * receiving an input which corresponds to some path through the input_dag from
57 * start or startDs to accept. input_dag MUST be acyclic aside from self-loops.
58 */
59flat_set<NFAVertex> execute_graph(const NGHolder &g, const NGHolder &input_dag,
60 const flat_set<NFAVertex> &initial);
61
62/* as above, but able to specify the source states for the input graph */
63flat_set<NFAVertex> execute_graph(const NGHolder &g, const NGHolder &input_dag,
64 const flat_set<NFAVertex> &input_start_states,
65 const flat_set<NFAVertex> &initial);
66
67/* returns true if it is possible for the nfa to die within age_limit bytes */
68bool can_die_early(const NGHolder &g, u32 age_limit);
69
70} // namespace ue2
71
72#endif
73