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 Boundary assertions (^, $, \\A, \\Z, \\z) |
31 | */ |
32 | |
33 | #ifndef _RE_COMPONENTBOUNDARY_H_ |
34 | #define _RE_COMPONENTBOUNDARY_H_ |
35 | |
36 | #include "Component.h" |
37 | #include "position.h" |
38 | |
39 | namespace ue2 { |
40 | |
41 | /** \brief Encapsulates a line/string boundary assertion. */ |
42 | class ComponentBoundary : public Component { |
43 | friend class DumpVisitor; |
44 | friend class PrintVisitor; |
45 | friend class UnsafeBoundsVisitor; |
46 | friend class MultilineVisitor; |
47 | public: |
48 | enum Boundary { |
49 | BEGIN_STRING, //!< beginning of data stream |
50 | END_STRING, //!< end of data stream |
51 | END_STRING_OPTIONAL_LF, //!< end of data stream with an optional |
52 | // linefeed |
53 | BEGIN_LINE, //!< '(^|\\n)' |
54 | END_LINE //!< '($|\\n)' |
55 | }; |
56 | |
57 | explicit ComponentBoundary(enum Boundary bound); |
58 | ~ComponentBoundary() override; |
59 | ComponentBoundary *clone() const override; |
60 | |
61 | Component *accept(ComponentVisitor &v) override { |
62 | Component *c = v.visit(this); |
63 | v.post(this); |
64 | return c; |
65 | } |
66 | |
67 | void accept(ConstComponentVisitor &v) const override { |
68 | v.pre(*this); |
69 | v.during(*this); |
70 | v.post(*this); |
71 | } |
72 | |
73 | std::vector<PositionInfo> first() const override; |
74 | std::vector<PositionInfo> last() const override; |
75 | bool empty() const override; |
76 | bool repeatable() const override; |
77 | void notePositions(GlushkovBuildState &bs) override; |
78 | void buildFollowSet(GlushkovBuildState &bs, |
79 | const std::vector<PositionInfo> &lastPos) override; |
80 | bool checkEmbeddedStartAnchor(bool at_start) const override; |
81 | bool checkEmbeddedEndAnchor(bool at_end) const override; |
82 | |
83 | private: |
84 | enum Boundary m_bound; //!< \brief which assertion is that? |
85 | Position m_newline; //!< \brief special newline state |
86 | std::vector<PositionInfo> m_first; //!< \brief positions returned for first() |
87 | std::vector<PositionInfo> m_last; //!< \brief positions returned for last() |
88 | |
89 | ComponentBoundary(const ComponentBoundary &other); |
90 | }; |
91 | |
92 | } // namespace ue2 |
93 | |
94 | #endif |
95 | |