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 | |
42 | namespace ue2 { |
43 | |
44 | class CharReach; |
45 | struct ue2_literal; |
46 | |
47 | flat_set<NFAVertex> execute_graph(const NGHolder &g, const ue2_literal &input, |
48 | const flat_set<NFAVertex> &initial, |
49 | bool kill_sds = false); |
50 | |
51 | flat_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 | */ |
59 | flat_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 */ |
63 | flat_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 */ |
68 | bool can_die_early(const NGHolder &g, u32 age_limit); |
69 | |
70 | } // namespace ue2 |
71 | |
72 | #endif |
73 | |