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 MCCLELLAN_COMPILE_UTIL_H |
30 | #define MCCLELLAN_COMPILE_UTIL_H |
31 | |
32 | #include "rdfa.h" |
33 | #include "ue2common.h" |
34 | |
35 | #include <set> |
36 | |
37 | namespace ue2 { |
38 | |
39 | u32 remove_leading_dots(raw_dfa &raw); |
40 | |
41 | /** |
42 | * \brief Clear reports on any states that are deeper than \a max_offset from |
43 | * start of stream. |
44 | * |
45 | * Returns false if no changes are made to the DFA. |
46 | */ |
47 | bool clear_deeper_reports(raw_dfa &raw, u32 max_offset); |
48 | |
49 | std::set<ReportID> all_reports(const raw_dfa &rdfa); |
50 | bool has_eod_accepts(const raw_dfa &rdfa); |
51 | bool has_non_eod_accepts(const raw_dfa &rdfa); |
52 | |
53 | /** \brief Compute a simple hash of this raw_dfa. Does not include report |
54 | * information. */ |
55 | size_t hash_dfa_no_reports(const raw_dfa &rdfa); |
56 | |
57 | /** \brief Compute a simple hash of this raw_dfa, including its reports. */ |
58 | size_t hash_dfa(const raw_dfa &rdfa); |
59 | |
60 | bool can_die_early(const raw_dfa &raw, u32 age_limit); |
61 | |
62 | /** |
63 | * \brief Returns true if this DFA cannot match, i.e. its start state is |
64 | * DEAD_STATE. |
65 | */ |
66 | bool is_dead(const raw_dfa &rdfa); |
67 | |
68 | |
69 | } // namespace ue2 |
70 | |
71 | #endif |
72 | |