1 | /* |
2 | * Copyright (c) 2015-2018, 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 NG declaration. |
31 | */ |
32 | |
33 | #ifndef NG_H |
34 | #define NG_H |
35 | |
36 | #include "ng_holder.h" |
37 | #include "ue2common.h" |
38 | #include "parser/position.h" |
39 | #include "som/slot_manager.h" |
40 | #include "som/som.h" |
41 | #include "util/boundary_reports.h" |
42 | #include "util/compile_context.h" |
43 | #include "util/depth.h" |
44 | #include "util/graph.h" |
45 | #include "util/noncopyable.h" |
46 | #include "util/report_manager.h" |
47 | |
48 | #include <deque> |
49 | #include <map> |
50 | #include <memory> |
51 | #include <utility> |
52 | #include <vector> |
53 | |
54 | namespace ue2 { |
55 | |
56 | struct CompileContext; |
57 | struct ue2_literal; |
58 | |
59 | class ExpressionInfo; |
60 | class RoseBuild; |
61 | class SmallWriteBuild; |
62 | |
63 | class NG : noncopyable { |
64 | public: |
65 | NG(const CompileContext &in_cc, size_t num_patterns, |
66 | unsigned in_somPrecision); |
67 | ~NG(); |
68 | |
69 | /** \brief Consumes a pattern, returns false or throws a CompileError |
70 | * exception if the graph cannot be consumed. */ |
71 | bool addGraph(ExpressionInfo &expr, std::unique_ptr<NGHolder> g_ptr); |
72 | |
73 | /** \brief Consumes a graph, cut-down version of addGraph for use by SOM |
74 | * processing. */ |
75 | bool addHolder(NGHolder &h); |
76 | |
77 | /** \brief Adds a literal to Rose, used by literal shortcut passes (instead |
78 | * of using \ref addGraph) */ |
79 | bool addLiteral(const ue2_literal &lit, u32 expr_index, u32 external_report, |
80 | bool highlander, som_type som, bool quiet); |
81 | |
82 | /** \brief Maximum history in bytes available for use by SOM reverse NFAs, |
83 | * a hack for pattern support (see UE-1903). This is always set to the max |
84 | * "lookbehind" length. */ |
85 | const u32 maxSomRevHistoryAvailable; |
86 | |
87 | /** \brief The length of the shortest corpus which can match a pattern |
88 | * contained in the NG (excluding the boundary reports used by vacuous |
89 | * patterns, which give an effective minWidth of zero). */ |
90 | depth minWidth; |
91 | |
92 | ReportManager rm; |
93 | SomSlotManager ssm; |
94 | BoundaryReports boundary; |
95 | const CompileContext cc; |
96 | |
97 | const std::unique_ptr<SmallWriteBuild> smwr; //!< SmallWrite builder. |
98 | const std::unique_ptr<RoseBuild> rose; //!< Rose builder. |
99 | }; |
100 | |
101 | /** \brief Run graph reduction passes. |
102 | * |
103 | * Shared with the small write compiler. |
104 | */ |
105 | void reduceGraph(NGHolder &g, som_type som, bool utf8, |
106 | const CompileContext &cc); |
107 | |
108 | } // namespace ue2 |
109 | |
110 | #endif |
111 | |