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 | |
42 | namespace ue2 { |
43 | |
44 | class CharReach; |
45 | class depth; |
46 | |
47 | /** |
48 | * \brief Structure representing the various state requirements for a given |
49 | * bounded repeat. |
50 | */ |
51 | struct 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 | */ |
70 | enum RepeatType chooseRepeatType(const depth &repeatMin, const depth &repeatMax, |
71 | u32 minPeriod, bool is_reset, |
72 | bool has_external_guard = false); |
73 | |
74 | u32 calcPackedBytes(u64a val); |
75 | |
76 | bool 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 | |
81 | std::vector<size_t> |
82 | minResetDistToEnd(const std::vector<std::vector<CharReach>> &triggers, |
83 | const CharReach &cr); |
84 | |
85 | u32 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 | |