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 | /** |
30 | * \file |
31 | * \brief NFA graph vertex depth calculations. |
32 | */ |
33 | |
34 | #ifndef NG_DEPTH_H |
35 | #define NG_DEPTH_H |
36 | |
37 | #include "ue2common.h" |
38 | #include "nfagraph/ng_holder.h" |
39 | #include "util/depth.h" |
40 | |
41 | #include <vector> |
42 | |
43 | namespace ue2 { |
44 | |
45 | /** |
46 | * \brief Encapsulates min/max depths relative to the start and startDs |
47 | * vertices. |
48 | */ |
49 | struct NFAVertexDepth { |
50 | DepthMinMax fromStart; |
51 | DepthMinMax fromStartDotStar; |
52 | }; |
53 | |
54 | /** |
55 | * \brief Encapsulates min/max depths relative to the accept and acceptEod |
56 | * vertices. |
57 | */ |
58 | struct NFAVertexRevDepth { |
59 | DepthMinMax toAccept; |
60 | DepthMinMax toAcceptEod; |
61 | }; |
62 | |
63 | /** |
64 | * \brief Encapsulates min/max depths relative to all of our special vertices. |
65 | */ |
66 | struct NFAVertexBidiDepth { |
67 | DepthMinMax fromStart; |
68 | DepthMinMax fromStartDotStar; |
69 | DepthMinMax toAccept; |
70 | DepthMinMax toAcceptEod; |
71 | }; |
72 | |
73 | /** |
74 | * \brief Calculate depths from start and startDs. Returns them in a vector, |
75 | * indexed by vertex index. |
76 | */ |
77 | std::vector<NFAVertexDepth> calcDepths(const NGHolder &g); |
78 | |
79 | /** |
80 | * \brief Calculate depths to accept and acceptEod. Returns them in a vector, |
81 | * indexed by vertex index. |
82 | */ |
83 | std::vector<NFAVertexRevDepth> calcRevDepths(const NGHolder &g); |
84 | |
85 | /** |
86 | * \brief Calculate depths to/from all special vertices. Returns them in a |
87 | * vector, indexed by vertex index. |
88 | */ |
89 | std::vector<NFAVertexBidiDepth> calcBidiDepths(const NGHolder &g); |
90 | |
91 | /** |
92 | * \brief Calculate the (min, max) depths from the given \p src to every vertex |
93 | * in the graph and return them in a vector, indexed by \p vertex_index. |
94 | */ |
95 | std::vector<DepthMinMax> calcDepthsFrom(const NGHolder &g, const NFAVertex src); |
96 | |
97 | } // namespace ue2 |
98 | |
99 | #endif // NG_DEPTH_H |
100 | |