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 Per-position flags used during Glushkov construction, PositionInfo class.
31 */
32
33#ifndef PARSER_POSITION_H
34#define PARSER_POSITION_H
35
36#include "ue2common.h"
37
38#include <set>
39
40namespace ue2 {
41
42#define POS_FLAG_NOFLOAT (1 << 0) //!< don't wire to start-dotstar
43#define POS_FLAG_MUST_FLOAT (1 << 1) //!< don't wire solely to start
44#define POS_FLAG_FIDDLE_ACCEPT (1 << 2) //!< add a dot with an offset adjustment when wiring to accept
45#define POS_FLAG_ASSERT_WORD_TO_NONWORD (1 << 3) //!< epsilon for word to nonword transition
46#define POS_FLAG_ASSERT_NONWORD_TO_WORD (1 << 4) //!< epsilon for nonword to word transition
47#define POS_FLAG_ASSERT_WORD_TO_WORD (1 << 5) //!< epsilon for word to word transition
48#define POS_FLAG_ASSERT_NONWORD_TO_NONWORD (1 << 6) //!< epsilon for nonword to nonword transition
49
50/** vertex created by cloning startDs, not considered part of the match.
51 * mirrors POS_FLAG_FIDDLE_ACCEPT */
52#define POS_FLAG_VIRTUAL_START (1 << 7)
53
54/** multi-line ^ does not match \\n at end of buffer. As a result, we must never
55 * wire the \\n from ^ to eod */
56#define POS_FLAG_MULTILINE_START (1 << 8)
57
58#define POS_FLAG_ASSERT_WORD_TO_NONWORD_UCP (1 << 9)
59#define POS_FLAG_ASSERT_NONWORD_TO_WORD_UCP (1 << 10)
60#define POS_FLAG_ASSERT_WORD_TO_WORD_UCP (1 << 11)
61#define POS_FLAG_ASSERT_NONWORD_TO_NONWORD_UCP (1 << 12)
62
63#define POS_FLAG_ASSERT_NONWORD_TO_ANY (POS_FLAG_ASSERT_NONWORD_TO_NONWORD \
64 | POS_FLAG_ASSERT_NONWORD_TO_WORD)
65#define POS_FLAG_ASSERT_WORD_TO_ANY (POS_FLAG_ASSERT_WORD_TO_NONWORD \
66 | POS_FLAG_ASSERT_WORD_TO_WORD)
67
68#define POS_FLAG_ASSERT_ANY_TO_NONWORD (POS_FLAG_ASSERT_NONWORD_TO_NONWORD \
69 | POS_FLAG_ASSERT_WORD_TO_NONWORD)
70#define POS_FLAG_ASSERT_ANY_TO_WORD (POS_FLAG_ASSERT_NONWORD_TO_WORD \
71 | POS_FLAG_ASSERT_WORD_TO_WORD)
72
73#define POS_FLAG_ASSERT_NONWORD_TO_ANY_UCP \
74 (POS_FLAG_ASSERT_NONWORD_TO_NONWORD_UCP \
75 | POS_FLAG_ASSERT_NONWORD_TO_WORD_UCP)
76#define POS_FLAG_ASSERT_WORD_TO_ANY_UCP (POS_FLAG_ASSERT_WORD_TO_NONWORD_UCP \
77 | POS_FLAG_ASSERT_WORD_TO_WORD_UCP)
78
79#define POS_FLAG_ASSERT_ANY_TO_NONWORD_UCP \
80 (POS_FLAG_ASSERT_NONWORD_TO_NONWORD_UCP \
81 | POS_FLAG_ASSERT_WORD_TO_NONWORD_UCP)
82#define POS_FLAG_ASSERT_ANY_TO_WORD_UCP (POS_FLAG_ASSERT_WORD_TO_WORD_UCP \
83 | POS_FLAG_ASSERT_NONWORD_TO_WORD_UCP)
84
85#define UCP_ASSERT_FLAGS (POS_FLAG_ASSERT_WORD_TO_ANY_UCP \
86 | POS_FLAG_ASSERT_NONWORD_TO_ANY_UCP)
87
88#define NON_UCP_ASSERT_FLAGS (POS_FLAG_ASSERT_WORD_TO_ANY \
89 | POS_FLAG_ASSERT_NONWORD_TO_ANY)
90
91/** do not wire to accept or other pos; may still wire to eod, etc if
92 * instructed */
93#define POS_FLAG_ONLY_ENDS (1 << 23)
94
95#define POS_FLAG_WIRE_EOD (1 << 24) /**< wire to accept eod */
96#define POS_FLAG_WIRE_NL_EOD (1 << 25) /**< wire to nl before accept eod */
97#define POS_FLAG_WIRE_NL_ACCEPT (1 << 26) /**< wire to nl before accept */
98#define POS_FLAG_NO_NL_EOD (1 << 27) /**< disallow nl before accept eod */
99#define POS_FLAG_NO_NL_ACCEPT (1 << 28) /**< disallow nl before accept */
100
101/** \brief Parse and Glushkov construction use only. State number within the
102 * NFA as it is being constructed. */
103typedef u32 Position;
104
105} // namespace ue2
106
107#endif // PARSER_POSITION_H
108