1/*
2 * Copyright (c) 2015, 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 Bounded repeat compile-time code.
31 */
32
33#ifndef REPEATCOMPILE_H
34#define REPEATCOMPILE_H
35
36#include "repeat_internal.h"
37
38#include <cstdint>
39#include <utility>
40#include <vector>
41
42namespace ue2 {
43
44class CharReach;
45class depth;
46
47/**
48 * \brief Structure representing the various state requirements for a given
49 * bounded repeat.
50 */
51struct RepeatStateInfo {
52 RepeatStateInfo(enum RepeatType type, const depth &repeatMin,
53 const depth &repeatMax, u32 minPeriod);
54
55 u32 stateSize;
56 u32 packedCtrlSize;
57 u32 horizon;
58 u32 patchCount;
59 u32 patchSize;
60 u32 encodingSize;
61 u32 patchesOffset;
62 std::vector<u32> packedFieldSizes;
63 std::vector<uint64_t> table; // not u64a, for boost/gcc-4.9
64};
65
66/**
67 * \brief Given the parameters of a repeat, choose a repeat implementation
68 * type.
69 */
70enum RepeatType chooseRepeatType(const depth &repeatMin, const depth &repeatMax,
71 u32 minPeriod, bool is_reset,
72 bool has_external_guard = false);
73
74u32 calcPackedBytes(u64a val);
75
76bool matches(std::vector<CharReach>::const_iterator a_it,
77 std::vector<CharReach>::const_iterator a_ite,
78 std::vector<CharReach>::const_iterator b_it,
79 std::vector<CharReach>::const_iterator b_ite);
80
81std::vector<size_t>
82minResetDistToEnd(const std::vector<std::vector<CharReach>> &triggers,
83 const CharReach &cr);
84
85u32 minPeriod(const std::vector<std::vector<CharReach>> &triggers,
86 const CharReach &cr, bool *can_reset);
87
88} // namespace ue2
89
90#endif // REPEATCOMPILE_H
91