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 Sequence of Component objects. |
31 | */ |
32 | |
33 | #ifndef COMPONENT_SEQUENCE_H |
34 | #define COMPONENT_SEQUENCE_H |
35 | |
36 | #include "Component.h" |
37 | #include "ComponentRepeat.h" // for ComponentRepeat::RepeatType |
38 | #include "ue2common.h" |
39 | |
40 | #include <memory> |
41 | #include <set> |
42 | #include <vector> |
43 | |
44 | namespace ue2 { |
45 | |
46 | class ComponentAlternation; |
47 | class GlushkovBuildState; |
48 | |
49 | // Encapsulates a number of sub expressions to be applied sequentially |
50 | class ComponentSequence : public Component { |
51 | friend class DumpVisitor; |
52 | friend class PrintVisitor; |
53 | friend class SimplifyVisitor; |
54 | public: |
55 | /** \brief capture index representing a sequence that ISN'T capturing */ |
56 | static constexpr unsigned int NOT_CAPTURED = 65536; |
57 | |
58 | ComponentSequence(); |
59 | ~ComponentSequence() override; |
60 | ComponentSequence *clone() const override; |
61 | Component *accept(ComponentVisitor &v) override; |
62 | void accept(ConstComponentVisitor &v) const override; |
63 | |
64 | bool addRepeat(u32 min, u32 max, ComponentRepeat::RepeatType type); |
65 | |
66 | // overridden by ComponentCondReference, which can only have 1 or 2 |
67 | // branches. |
68 | virtual void addAlternation(); |
69 | |
70 | virtual void finalize(); |
71 | |
72 | void addComponent(std::unique_ptr<Component> comp); |
73 | |
74 | std::vector<PositionInfo> first() const override; |
75 | std::vector<PositionInfo> last() const override; |
76 | bool empty(void) const override; |
77 | bool vacuous_everywhere() const override; |
78 | void notePositions(GlushkovBuildState &bs) override; |
79 | void buildFollowSet(GlushkovBuildState &bs, |
80 | const std::vector<PositionInfo> &lastPos) override; |
81 | bool checkEmbeddedStartAnchor(bool at_start) const override; |
82 | bool checkEmbeddedEndAnchor(bool at_end) const override; |
83 | |
84 | void optimise(bool connected_to_sds) override; |
85 | |
86 | void setCaptureIndex(unsigned int idx) { capture_index = idx; } |
87 | unsigned int getCaptureIndex() const { return capture_index; } |
88 | void setCaptureName(const std::string &s) { capture_name = s; } |
89 | const std::string &getCaptureName() const { return capture_name; } |
90 | |
91 | virtual const std::vector<std::unique_ptr<Component>> &getChildren() const { |
92 | return children; |
93 | } |
94 | |
95 | protected: |
96 | ComponentSequence(const ComponentSequence &other); |
97 | |
98 | std::vector<std::unique_ptr<Component>> children; |
99 | std::unique_ptr<ComponentAlternation> alternation; |
100 | |
101 | private: |
102 | unsigned int capture_index; |
103 | std::string capture_name; //!< empty means no name |
104 | }; |
105 | |
106 | } // namespace ue2 |
107 | |
108 | #endif |
109 | |