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
44namespace 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 */
50typedef flat_map<u32, std::vector<u32>> som_tran_info;
51
52struct 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
66struct 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
72struct 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 stripExtraEodReports(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
91bytecode_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