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 | #ifndef GOUGHCOMPILE_H |
30 | #define GOUGHCOMPILE_H |
31 | |
32 | #include "mcclellancompile.h" |
33 | #include "nfa_kind.h" |
34 | #include "ue2common.h" |
35 | #include "util/bytecode_ptr.h" |
36 | #include "util/flat_containers.h" |
37 | #include "util/order_check.h" |
38 | |
39 | #include <map> |
40 | #include <memory> |
41 | #include <set> |
42 | #include <vector> |
43 | |
44 | namespace ue2 { |
45 | |
46 | #define CREATE_NEW_SOM (~0U) |
47 | |
48 | /* dest nfa state -> som info for dest state is min of provided loc idx som |
49 | * info */ |
50 | typedef flat_map<u32, std::vector<u32>> som_tran_info; |
51 | |
52 | struct som_report { |
53 | som_report(ReportID r, u32 s) : report(r), slot(s) {} |
54 | |
55 | ReportID report; |
56 | u32 slot; |
57 | |
58 | bool operator<(const som_report &b) const { |
59 | const som_report &a = *this; |
60 | ORDER_CHECK(report); |
61 | ORDER_CHECK(slot); |
62 | return false; |
63 | } |
64 | }; |
65 | |
66 | struct dstate_som { |
67 | std::set<som_report> reports; |
68 | std::set<som_report> reports_eod; |
69 | som_tran_info preds; /* live nfa states mapped back to pred states */ |
70 | }; |
71 | |
72 | struct raw_som_dfa : public raw_dfa { |
73 | raw_som_dfa(nfa_kind k, bool unordered_som_triggers_in, u32 trigger, |
74 | u32 stream_som_loc_width_in) |
75 | : raw_dfa(k), stream_som_loc_width(stream_som_loc_width_in), |
76 | unordered_som_triggers(unordered_som_triggers_in), |
77 | trigger_nfa_state(trigger) { |
78 | assert(!unordered_som_triggers || is_triggered(kind)); |
79 | } |
80 | |
81 | std::vector<dstate_som> state_som; |
82 | u32 stream_som_loc_width; |
83 | bool unordered_som_triggers; |
84 | void (void) override; |
85 | |
86 | std::map<u32, u32> new_som_nfa_states; /* map nfa vertex id -> offset */ |
87 | u32 trigger_nfa_state; /* for triggered cases, slot_id that contains a new |
88 | * som */ |
89 | }; |
90 | |
91 | bytecode_ptr<NFA> goughCompile(raw_som_dfa &raw, u8 somPrecision, |
92 | const CompileContext &cc, |
93 | const ReportManager &rm); |
94 | |
95 | } // namespace ue2 |
96 | |
97 | #endif // GOUGHCOMPILE_H |
98 | |