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
37namespace ue2 {
38
39u32 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 */
47bool clear_deeper_reports(raw_dfa &raw, u32 max_offset);
48
49std::set<ReportID> all_reports(const raw_dfa &rdfa);
50bool has_eod_accepts(const raw_dfa &rdfa);
51bool 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. */
55size_t hash_dfa_no_reports(const raw_dfa &rdfa);
56
57/** \brief Compute a simple hash of this raw_dfa, including its reports. */
58size_t hash_dfa(const raw_dfa &rdfa);
59
60bool 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 */
66bool is_dead(const raw_dfa &rdfa);
67
68
69} // namespace ue2
70
71#endif
72