@@ -0,0 +1,30 | |||||
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1 | using System; | |||
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2 | using System.IO; | |||
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3 | ||||
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4 | namespace Implab.Formats { | |||
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5 | public class ReaderScanner: TextScanner { | |||
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6 | const int CHUNK_SIZE = 1024; | |||
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7 | const int BUFFER_MAX = CHUNK_SIZE*1024; | |||
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8 | ||||
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9 | readonly TextReader m_reader; | |||
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10 | ||||
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11 | public ReaderScanner(TextReader reader, int limit, int chunk) : base(limit, chunk) { | |||
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12 | Safe.ArgumentNotNull(reader, "reader"); | |||
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13 | m_reader = reader; | |||
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14 | } | |||
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15 | ||||
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16 | public ReaderScanner(TextReader reader) : this(reader, BUFFER_MAX, CHUNK_SIZE) { | |||
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17 | } | |||
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18 | ||||
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19 | protected override int Read(char[] buffer, int offset, int size) { | |||
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20 | return m_reader.Read(buffer, offset, size); | |||
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21 | } | |||
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22 | ||||
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23 | protected override void Dispose(bool disposing) { | |||
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24 | if (disposing) | |||
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25 | Safe.Dispose(m_reader); | |||
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26 | base.Dispose(disposing); | |||
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27 | } | |||
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28 | } | |||
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29 | } | |||
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30 |
@@ -0,0 +1,24 | |||||
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1 | using System; | |||
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2 | ||||
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3 | namespace Implab.Formats { | |||
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4 | public class ScannerContext<TTag> { | |||
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5 | public int[,] Dfa { get; private set; } | |||
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6 | public bool[] Final { get; private set; } | |||
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7 | public TTag[][] Tags { get; private set; } | |||
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8 | public int State { get; private set; } | |||
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9 | public int[] Alphabet { get; private set; } | |||
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10 | ||||
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11 | public ScannerContext(int[,] dfa, bool[] final, TTag[][] tags, int state, int[] alphabet) { | |||
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12 | Dfa = dfa; | |||
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13 | Final = final; | |||
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14 | Tags = tags; | |||
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15 | State = state; | |||
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16 | Alphabet = alphabet; | |||
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17 | } | |||
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18 | ||||
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19 | public bool Execute(TextScanner scanner, out TTag[] tag) { | |||
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20 | return scanner.ReadToken(Dfa, Final, Tags, State, Alphabet, out tag); | |||
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21 | } | |||
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22 | } | |||
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23 | } | |||
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24 |
@@ -0,0 +1,26 | |||||
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1 | using System; | |||
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2 | ||||
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3 | namespace Implab.Formats { | |||
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4 | public class StringScanner: TextScanner { | |||
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5 | const int CHUNK_SIZE = 1024; | |||
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6 | ||||
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7 | readonly string m_text; | |||
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8 | int m_pos; | |||
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9 | ||||
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10 | public StringScanner(string text) : base(text.Length, text.Length < CHUNK_SIZE ? text.Length : CHUNK_SIZE) { | |||
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11 | m_text = text; | |||
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12 | Feed(); | |||
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13 | } | |||
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14 | ||||
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15 | protected override int Read(char[] buffer, int offset, int size) { | |||
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16 | var actual = size + m_pos > m_text.Length ? m_text.Length - m_pos : size; | |||
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17 | ||||
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18 | m_text.CopyTo(m_pos,buffer,offset, actual); | |||
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19 | ||||
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20 | m_pos += actual; | |||
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21 | ||||
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22 | return actual; | |||
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23 | } | |||
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24 | } | |||
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25 | } | |||
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26 |
This diff has been collapsed as it changes many lines, (618 lines changed) Show them Hide them | |||||
@@ -1,305 +1,313 | |||||
1 | using Implab; |
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1 | using Implab; | |
2 | using System; |
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2 | using System; | |
3 | using System.Collections.Generic; |
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3 | using System.Collections.Generic; | |
4 | using System.Linq; |
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4 | using System.Linq; | |
5 |
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5 | |||
6 | namespace Implab.Automaton { |
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6 | namespace Implab.Automaton { | |
7 | public class DFATable : IDFATableBuilder { |
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7 | public class DFATable : IDFATableBuilder { | |
8 | int m_stateCount; |
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8 | int m_stateCount; | |
9 | int m_symbolCount; |
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9 | int m_symbolCount; | |
10 | int m_initialState; |
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10 | int m_initialState; | |
11 |
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11 | |||
12 | readonly HashSet<int> m_finalStates = new HashSet<int>(); |
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12 | readonly HashSet<int> m_finalStates = new HashSet<int>(); | |
13 | readonly HashSet<AutomatonTransition> m_transitions = new HashSet<AutomatonTransition>(); |
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13 | readonly HashSet<AutomatonTransition> m_transitions = new HashSet<AutomatonTransition>(); | |
14 |
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14 | |||
15 |
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15 | |||
16 | #region IDFADefinition implementation |
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16 | #region IDFADefinition implementation | |
17 |
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17 | |||
18 | public bool IsFinalState(int s) { |
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18 | public bool IsFinalState(int s) { | |
19 | Safe.ArgumentInRange(s, 0, m_stateCount, "s"); |
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19 | Safe.ArgumentInRange(s, 0, m_stateCount, "s"); | |
20 |
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20 | |||
21 | return m_finalStates.Contains(s); |
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21 | return m_finalStates.Contains(s); | |
22 | } |
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22 | } | |
23 |
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23 | |||
24 | public IEnumerable<int> FinalStates { |
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24 | public IEnumerable<int> FinalStates { | |
25 | get { |
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25 | get { | |
26 | return m_finalStates; |
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26 | return m_finalStates; | |
27 | } |
|
27 | } | |
28 | } |
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28 | } | |
29 |
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29 | |||
30 | public int StateCount { |
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30 | public int StateCount { | |
31 | get { return m_stateCount; } |
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31 | get { return m_stateCount; } | |
32 | } |
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32 | } | |
33 |
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33 | |||
34 | public int AlphabetSize { |
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34 | public int AlphabetSize { | |
35 | get { return m_symbolCount; } |
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35 | get { return m_symbolCount; } | |
36 | } |
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36 | } | |
37 |
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37 | |||
38 | public int InitialState { |
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38 | public int InitialState { | |
39 | get { return m_initialState; } |
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39 | get { return m_initialState; } | |
40 | } |
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40 | } | |
41 |
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41 | |||
42 | #endregion |
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42 | #endregion | |
43 |
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43 | |||
44 | public void SetInitialState(int s) { |
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44 | public void SetInitialState(int s) { | |
45 | Safe.ArgumentAssert(s >= 0, "s"); |
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45 | Safe.ArgumentAssert(s >= 0, "s"); | |
46 | m_initialState = s; |
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46 | m_initialState = s; | |
47 | } |
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47 | } | |
48 |
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48 | |||
49 | public void MarkFinalState(int state) { |
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49 | public void MarkFinalState(int state) { | |
50 | m_finalStates.Add(state); |
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50 | m_finalStates.Add(state); | |
51 | } |
|
51 | } | |
52 |
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52 | |||
53 | public void Add(AutomatonTransition item) { |
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53 | public void Add(AutomatonTransition item) { | |
54 | Safe.ArgumentAssert(item.s1 >= 0, "item"); |
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54 | Safe.ArgumentAssert(item.s1 >= 0, "item"); | |
55 | Safe.ArgumentAssert(item.s2 >= 0, "item"); |
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55 | Safe.ArgumentAssert(item.s2 >= 0, "item"); | |
56 | Safe.ArgumentAssert(item.edge >= 0, "item"); |
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56 | Safe.ArgumentAssert(item.edge >= 0, "item"); | |
57 |
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57 | |||
58 | m_stateCount = Math.Max(m_stateCount, Math.Max(item.s1, item.s2) + 1); |
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58 | m_stateCount = Math.Max(m_stateCount, Math.Max(item.s1, item.s2) + 1); | |
59 | m_symbolCount = Math.Max(m_symbolCount, item.edge); |
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59 | m_symbolCount = Math.Max(m_symbolCount, item.edge); | |
60 |
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60 | |||
61 | m_transitions.Add(item); |
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61 | m_transitions.Add(item); | |
62 | } |
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62 | } | |
63 |
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63 | |||
64 | public void Clear() { |
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64 | public void Clear() { | |
65 | m_stateCount = 0; |
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65 | m_stateCount = 0; | |
66 | m_symbolCount = 0; |
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66 | m_symbolCount = 0; | |
67 | m_finalStates.Clear(); |
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67 | m_finalStates.Clear(); | |
68 | m_transitions.Clear(); |
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68 | m_transitions.Clear(); | |
69 | } |
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69 | } | |
70 |
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70 | |||
71 | public bool Contains(AutomatonTransition item) { |
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71 | public bool Contains(AutomatonTransition item) { | |
72 | return m_transitions.Contains(item); |
|
72 | return m_transitions.Contains(item); | |
73 | } |
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73 | } | |
74 |
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74 | |||
75 | public void CopyTo(AutomatonTransition[] array, int arrayIndex) { |
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75 | public void CopyTo(AutomatonTransition[] array, int arrayIndex) { | |
76 | m_transitions.CopyTo(array, arrayIndex); |
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76 | m_transitions.CopyTo(array, arrayIndex); | |
77 | } |
|
77 | } | |
78 |
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78 | |||
79 | public bool Remove(AutomatonTransition item) { |
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79 | public bool Remove(AutomatonTransition item) { | |
80 | m_transitions.Remove(item); |
|
80 | m_transitions.Remove(item); | |
81 | } |
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81 | } | |
82 |
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82 | |||
83 | public int Count { |
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83 | public int Count { | |
84 | get { |
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84 | get { | |
85 | return m_transitions.Count; |
|
85 | return m_transitions.Count; | |
86 | } |
|
86 | } | |
87 | } |
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87 | } | |
88 |
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88 | |||
89 | public bool IsReadOnly { |
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89 | public bool IsReadOnly { | |
90 | get { |
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90 | get { | |
91 | return false; |
|
91 | return false; | |
92 | } |
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92 | } | |
93 | } |
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93 | } | |
94 |
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94 | |||
95 | public IEnumerator<AutomatonTransition> GetEnumerator() { |
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95 | public IEnumerator<AutomatonTransition> GetEnumerator() { | |
96 | return m_transitions.GetEnumerator(); |
|
96 | return m_transitions.GetEnumerator(); | |
97 | } |
|
97 | } | |
98 |
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98 | |||
99 | System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { |
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99 | System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { | |
100 | return GetEnumerator(); |
|
100 | return GetEnumerator(); | |
101 | } |
|
101 | } | |
102 |
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102 | |||
103 |
public |
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103 | public int[,] CreateTransitionTable() { | |
104 |
var table = new |
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104 | var table = new int[StateCount,AlphabetSize]; | |
105 |
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105 | |||
106 | foreach (var t in this) { |
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106 | for (int i = 0; i < StateCount; i++) | |
107 | if (table[t.s1].transitions == null) |
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107 | for (int j = 0; i < AlphabetSize; j++) | |
108 | table[t.s1] = new DFAStateDescriptor(AlphabetSize, IsFinalState(t.s1)); |
|
108 | table[i, j] = DFAConst.UNREACHABLE_STATE; | |
109 | if (table[t.s2].transitions == null) |
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109 | ||
110 | table[t.s2] = new DFAStateDescriptor(AlphabetSize, IsFinalState(t.s2)); |
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110 | foreach (var t in this) | |
111 |
table[t.s1 |
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111 | table[t.s1,t.edge] = t.s2; | |
112 | } |
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112 | ||
113 |
|
113 | return table; | ||
114 | return table; |
|
114 | } | |
115 | } |
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115 | ||
116 |
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116 | public bool[] CreateFinalStateTable() { | ||
117 | /// <summary>Формирует множества конечных состояний перед началом работы алгоритма минимизации.</summary> |
|
117 | var table = new bool[StateCount]; | |
118 | /// <remarks> |
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118 | ||
119 | /// В процессе построения минимального автомата требуется разделить множество состояний, |
|
119 | foreach (var s in FinalStates) | |
120 | /// на два подмножества - конечные состояния и все остальные, после чего эти подмножества |
|
120 | table[s] = true; | |
121 | /// будут резделены на более мелкие. Иногда требуется гарантировать различия конечных сосотяний, |
|
121 | ||
122 | /// для этого необходимо переопределить даннцю фукнцию, для получения множеств конечных состояний. |
|
122 | return table; | |
123 | /// </remarks> |
|
123 | } | |
124 | /// <returns>The final states.</returns> |
|
124 | ||
125 | protected virtual IEnumerable<HashSet<int>> GroupFinalStates() { |
|
125 | /// <summary>Формирует множества конечных состояний перед началом работы алгоритма минимизации.</summary> | |
126 | return new HashSet<int>[] { m_finalStates }; |
|
126 | /// <remarks> | |
127 | } |
|
127 | /// В процессе построения минимального автомата требуется разделить множество состояний, | |
128 |
|
128 | /// на два подмножества - конечные состояния и все остальные, после чего эти подмножества | ||
129 | protected void Optimize( |
|
129 | /// будут резделены на более мелкие. Иногда требуется гарантировать различия конечных сосотяний, | |
130 | IDFATableBuilder optimalDFA, |
|
130 | /// для этого необходимо переопределить даннцю фукнцию, для получения множеств конечных состояний. | |
131 | IDictionary<int,int> alphabetMap, |
|
131 | /// </remarks> | |
132 | IDictionary<int,int> stateMap |
|
132 | /// <returns>The final states.</returns> | |
133 | ) { |
|
133 | protected virtual IEnumerable<HashSet<int>> GroupFinalStates() { | |
134 | Safe.ArgumentNotNull(optimalDFA, "dfa"); |
|
134 | return new HashSet<int>[] { m_finalStates }; | |
135 | Safe.ArgumentNotNull(alphabetMap, "alphabetMap"); |
|
135 | } | |
136 | Safe.ArgumentNotNull(stateMap, "stateMap"); |
|
136 | ||
137 |
|
137 | protected void Optimize( | ||
138 |
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138 | IDFATableBuilder optimalDFA, | ||
139 | var setComparer = new CustomEqualityComparer<HashSet<int>>( |
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139 | IDictionary<int,int> alphabetMap, | |
140 | (x, y) => x.SetEquals(y), |
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140 | IDictionary<int,int> stateMap | |
141 | s => s.Sum(x => x.GetHashCode()) |
|
141 | ) { | |
142 | ); |
|
142 | Safe.ArgumentNotNull(optimalDFA, "dfa"); | |
143 |
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143 | Safe.ArgumentNotNull(alphabetMap, "alphabetMap"); | ||
144 | var optimalStates = new HashSet<HashSet<int>>(setComparer); |
|
144 | Safe.ArgumentNotNull(stateMap, "stateMap"); | |
145 | var queue = new HashSet<HashSet<int>>(setComparer); |
|
145 | ||
146 |
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146 | |||
147 | // получаем конечные состояния, сгруппированные по маркерам |
|
147 | var setComparer = new CustomEqualityComparer<HashSet<int>>( | |
148 | optimalStates.UnionWith( |
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148 | (x, y) => x.SetEquals(y), | |
149 | GroupFinalStates() |
|
149 | s => s.Sum(x => x.GetHashCode()) | |
150 | ); |
|
150 | ); | |
151 |
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151 | |||
152 |
var |
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152 | var optimalStates = new HashSet<HashSet<int>>(setComparer); | |
153 | Enumerable |
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153 | var queue = new HashSet<HashSet<int>>(setComparer); | |
154 | .Range(0, m_stateCount - 1) |
|
154 | ||
155 | .Where(i => !m_finalStates.Contains(i)) |
|
155 | // получаем конечные состояния, сгруппированные по маркерам | |
156 | ); |
|
156 | optimalStates.UnionWith( | |
157 |
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157 | GroupFinalStates() | ||
158 | optimalStates.Add(state); |
|
158 | ); | |
159 | queue.Add(state); |
|
159 | ||
160 |
|
160 | var state = new HashSet<int>( | ||
161 | var rmap = m_transitions |
|
161 | Enumerable | |
162 | .GroupBy(t => t.s2) |
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162 | .Range(0, m_stateCount - 1) | |
163 | .ToLookup( |
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163 | .Where(i => !m_finalStates.Contains(i)) | |
164 | g => g.Key, // s2 |
|
164 | ); | |
165 | g => g.ToLookup(t => t.edge, t => t.s1) |
|
165 | ||
166 | ); |
|
166 | optimalStates.Add(state); | |
167 |
|
167 | queue.Add(state); | ||
168 | while (queue.Count > 0) { |
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168 | ||
169 | var stateA = queue.First(); |
|
169 | var rmap = m_transitions | |
170 | queue.Remove(stateA); |
|
170 | .GroupBy(t => t.s2) | |
171 |
|
171 | .ToLookup( | ||
172 | for (int c = 0; c < m_symbolCount; c++) { |
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172 | g => g.Key, // s2 | |
173 | var stateX = new HashSet<int>(); |
|
173 | g => g.ToLookup(t => t.edge, t => t.s1) | |
174 | foreach(var a in stateA) |
|
174 | ); | |
175 | stateX.UnionWith(rmap[a][c]); // all states from wich 'c' leads to 'a' |
|
175 | ||
176 |
|
176 | while (queue.Count > 0) { | ||
177 | foreach (var stateY in optimalStates.ToArray()) { |
|
177 | var stateA = queue.First(); | |
178 | if (stateX.Overlaps(stateY) && !stateY.IsSubsetOf(stateX)) { |
|
178 | queue.Remove(stateA); | |
179 | var stateR1 = new HashSet<int>(stateY); |
|
179 | ||
180 | var stateR2 = new HashSet<int>(stateY); |
|
180 | for (int c = 0; c < m_symbolCount; c++) { | |
181 |
|
181 | var stateX = new HashSet<int>(); | ||
182 | stateR1.IntersectWith(stateX); |
|
182 | foreach(var a in stateA) | |
183 | stateR2.ExceptWith(stateX); |
|
183 | stateX.UnionWith(rmap[a][c]); // all states from wich 'c' leads to 'a' | |
184 |
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184 | |||
185 |
|
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185 | foreach (var stateY in optimalStates.ToArray()) { | |
186 | optimalStates.Add(stateR1); |
|
186 | if (stateX.Overlaps(stateY) && !stateY.IsSubsetOf(stateX)) { | |
187 |
|
|
187 | var stateR1 = new HashSet<int>(stateY); | |
188 |
|
188 | var stateR2 = new HashSet<int>(stateY); | ||
189 | if (queue.Contains(stateY)) { |
|
189 | ||
190 |
|
|
190 | stateR1.IntersectWith(stateX); | |
191 |
|
|
191 | stateR2.ExceptWith(stateX); | |
192 | queue.Add(stateR2); |
|
192 | ||
193 |
|
|
193 | optimalStates.Remove(stateY); | |
194 | queue.Add(stateR1.Count <= stateR2.Count ? stateR1 : stateR2); |
|
194 | optimalStates.Add(stateR1); | |
195 |
|
|
195 | optimalStates.Add(stateR2); | |
196 | } |
|
196 | ||
197 | } |
|
197 | if (queue.Contains(stateY)) { | |
198 | } |
|
198 | queue.Remove(stateY); | |
199 | } |
|
199 | queue.Add(stateR1); | |
200 |
|
200 | queue.Add(stateR2); | ||
201 | // карта получения оптимального состояния по соотвествующему ему простому состоянию |
|
201 | } else { | |
202 | var nextState = 0; |
|
202 | queue.Add(stateR1.Count <= stateR2.Count ? stateR1 : stateR2); | |
203 | foreach (var item in optimalStates) { |
|
203 | } | |
204 |
|
|
204 | } | |
205 |
|
|
205 | } | |
206 | stateMap[s] = id; |
|
206 | } | |
207 | } |
|
207 | } | |
208 |
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208 | |||
209 | // получаем минимальный алфавит |
|
209 | // карта получения оптимального состояния по соотвествующему ему простому состоянию | |
210 | // входные символы не различимы, если Move(s,a1) == Move(s,a2), для любого s |
|
210 | var nextState = 0; | |
211 | // для этого используем алгоритм кластеризации, сначала |
|
211 | foreach (var item in optimalStates) { | |
212 | // считаем, что все символы не различимы |
|
212 | var id = nextState++; | |
213 |
|
213 | foreach (var s in item) | ||
214 | var minClasses = new HashSet<HashSet<int>>(setComparer); |
|
214 | stateMap[s] = id; | |
215 | var alphaQueue = new Queue<HashSet<int>>(); |
|
215 | } | |
216 | alphaQueue.Enqueue(new HashSet<int>(Enumerable.Range(0,AlphabetSize))); |
|
216 | ||
217 |
|
217 | // получаем минимальный алфавит | ||
218 | // для всех состояний, будем проверять каждый класс на различимость, |
|
218 | // входные символы не различимы, если Move(s,a1) == Move(s,a2), для любого s | |
219 | // т.е. символы различимы, если они приводят к разным состояниям |
|
219 | // для этого используем алгоритм кластеризации, сначала | |
220 | for (int s = 0 ; s < optimalStates.Count; s++) { |
|
220 | // считаем, что все символы не различимы | |
221 | var newQueue = new Queue<HashSet<int>>(); |
|
221 | ||
222 |
|
222 | var minClasses = new HashSet<HashSet<int>>(setComparer); | ||
223 | foreach (var A in alphaQueue) { |
|
223 | var alphaQueue = new Queue<HashSet<int>>(); | |
224 | // классы из одного символа делить бесполезно, переводим их сразу в |
|
224 | alphaQueue.Enqueue(new HashSet<int>(Enumerable.Range(0,AlphabetSize))); | |
225 | // результирующий алфавит |
|
225 | ||
226 | if (A.Count == 1) { |
|
226 | // для всех состояний, будем проверять каждый класс на различимость, | |
227 | minClasses.Add(A); |
|
227 | // т.е. символы различимы, если они приводят к разным состояниям | |
228 | continue; |
|
228 | for (int s = 0 ; s < optimalStates.Count; s++) { | |
229 | } |
|
229 | var newQueue = new Queue<HashSet<int>>(); | |
230 |
|
230 | |||
231 | // различаем классы символов, которые переводят в различные оптимальные состояния |
|
231 | foreach (var A in alphaQueue) { | |
232 | // optimalState -> alphaClass |
|
232 | // классы из одного символа делить бесполезно, переводим их сразу в | |
233 | var classes = new Dictionary<int, HashSet<int>>(); |
|
233 | // результирующий алфавит | |
234 |
|
234 | if (A.Count == 1) { | ||
235 |
|
|
235 | minClasses.Add(A); | |
236 | // ищем все переходы класса по символу term |
|
236 | continue; | |
237 | var res = m_transitions.Where(t => stateMap[t.s1] == s && t.edge == term).Select(t => stateMap[t.s2]).ToArray(); |
|
237 | } | |
238 |
|
238 | |||
239 | var s2 = res.Length > 0 ? res[0] : -1; |
|
239 | // различаем классы символов, которые переводят в различные оптимальные состояния | |
240 |
|
240 | // optimalState -> alphaClass | ||
241 |
HashSet<int> |
|
241 | var classes = new Dictionary<int, HashSet<int>>(); | |
242 | if (!classes.TryGetValue(s2, out a2)) { |
|
242 | ||
243 | a2 = new HashSet<int>(); |
|
243 | foreach (var term in A) { | |
244 | newQueue.Enqueue(a2); |
|
244 | // ищем все переходы класса по символу term | |
245 | classes[s2] = a2; |
|
245 | var res = m_transitions.Where(t => stateMap[t.s1] == s && t.edge == term).Select(t => stateMap[t.s2]).ToArray(); | |
246 | } |
|
246 | ||
247 |
a2. |
|
247 | var s2 = res.Length > 0 ? res[0] : -1; | |
248 |
|
|
248 | ||
249 | } |
|
249 | HashSet<int> a2; | |
250 |
|
250 | if (!classes.TryGetValue(s2, out a2)) { | ||
251 | if (newQueue.Count == 0) |
|
251 | a2 = new HashSet<int>(); | |
252 |
|
|
252 | newQueue.Enqueue(a2); | |
253 | alphaQueue = newQueue; |
|
253 | classes[s2] = a2; | |
254 | } |
|
254 | } | |
255 |
|
255 | a2.Add(term); | ||
256 | // после окончания работы алгоритма в очереди останутся минимальные различимые классы |
|
256 | } | |
257 | // входных символов |
|
257 | } | |
258 | foreach (var A in alphaQueue) |
|
258 | ||
259 | minClasses.Add(A); |
|
259 | if (newQueue.Count == 0) | |
260 |
|
260 | break; | ||
261 | // построение отображения алфавитов входных символов. |
|
261 | alphaQueue = newQueue; | |
262 | // поскольку символ DFAConst.UNCLASSIFIED_INPUT может иметь |
|
262 | } | |
263 | // специальное значение, тогда сохраним минимальный класс, |
|
263 | ||
264 | // содержащий этот символ на томже месте. |
|
264 | // после окончания работы алгоритма в очереди останутся минимальные различимые классы | |
265 |
|
265 | // входных символов | ||
266 | var nextCls = 0; |
|
266 | foreach (var A in alphaQueue) | |
267 |
|
|
267 | minClasses.Add(A); | |
268 | if (nextCls == DFAConst.UNCLASSIFIED_INPUT) |
|
268 | ||
269 | nextCls++; |
|
269 | // построение отображения алфавитов входных символов. | |
270 |
|
270 | // поскольку символ DFAConst.UNCLASSIFIED_INPUT может иметь | ||
271 | // сохраняем DFAConst.UNCLASSIFIED_INPUT |
|
271 | // специальное значение, тогда сохраним минимальный класс, | |
272 | var cls = item.Contains(DFAConst.UNCLASSIFIED_INPUT) ? DFAConst.UNCLASSIFIED_INPUT : nextCls; |
|
272 | // содержащий этот символ на томже месте. | |
273 |
|
273 | |||
274 | foreach (var a in item) |
|
274 | var nextCls = 0; | |
275 | alphabetMap[a] = cls; |
|
275 | foreach (var item in minClasses) { | |
276 |
|
276 | if (nextCls == DFAConst.UNCLASSIFIED_INPUT) | ||
277 | nextCls++; |
|
277 | nextCls++; | |
278 | } |
|
278 | ||
279 |
|
279 | // сохраняем DFAConst.UNCLASSIFIED_INPUT | ||
280 | // построение автомата |
|
280 | var cls = item.Contains(DFAConst.UNCLASSIFIED_INPUT) ? DFAConst.UNCLASSIFIED_INPUT : nextCls; | |
281 | optimalDFA.SetInitialState(stateMap[m_initialState]); |
|
281 | ||
282 |
|
282 | foreach (var a in item) | ||
283 | foreach (var sf in m_finalStates.Select(s => stateMap[s]).Distinct()) |
|
283 | alphabetMap[a] = cls; | |
284 | optimalDFA.MarkFinalState(sf); |
|
284 | ||
285 |
|
285 | nextCls++; | ||
286 | foreach (var t in m_transitions.Select(t => new AutomatonTransition(stateMap[t.s1],stateMap[t.s2],alphabetMap[t.edge])).Distinct()) |
|
286 | } | |
287 | optimalDFA.Add(t); |
|
287 | ||
288 | } |
|
288 | // построение автомата | |
289 |
|
289 | optimalDFA.SetInitialState(stateMap[m_initialState]); | ||
290 | protected void PrintDFA<TInput, TState>(IAlphabet<TInput> inputAlphabet, IAlphabet<TState> stateAlphabet) { |
|
290 | ||
291 | Safe.ArgumentNotNull(inputAlphabet, "inputAlphabet"); |
|
291 | foreach (var sf in m_finalStates.Select(s => stateMap[s]).Distinct()) | |
292 | Safe.ArgumentNotNull(stateAlphabet, "stateAlphabet"); |
|
292 | optimalDFA.MarkFinalState(sf); | |
293 |
|
293 | |||
294 | foreach(var t in m_transitions) |
|
294 | foreach (var t in m_transitions.Select(t => new AutomatonTransition(stateMap[t.s1],stateMap[t.s2],alphabetMap[t.edge])).Distinct()) | |
295 | Console.WriteLine( |
|
295 | optimalDFA.Add(t); | |
296 | "[{0}] -{{{1}}}-> [{2}]{3}", |
|
296 | } | |
297 | String.Join(",", stateAlphabet.GetSymbols(t.s1)), |
|
297 | ||
298 | String.Join("", inputAlphabet.GetSymbols(t.edge)), |
|
298 | protected void PrintDFA<TInput, TState>(IAlphabet<TInput> inputAlphabet, IAlphabet<TState> stateAlphabet) { | |
299 | String.Join(",", stateAlphabet.GetSymbols(t.s2)), |
|
299 | Safe.ArgumentNotNull(inputAlphabet, "inputAlphabet"); | |
300 | m_finalStates.Contains(t.s2) ? "$" : "" |
|
300 | Safe.ArgumentNotNull(stateAlphabet, "stateAlphabet"); | |
301 | ); |
|
301 | ||
302 | } |
|
302 | foreach(var t in m_transitions) | |
303 |
|
303 | Console.WriteLine( | ||
304 | } |
|
304 | "[{0}] -{{{1}}}-> [{2}]{3}", | |
305 | } |
|
305 | String.Join(",", stateAlphabet.GetSymbols(t.s1)), | |
|
306 | String.Join("", inputAlphabet.GetSymbols(t.edge)), | |||
|
307 | String.Join(",", stateAlphabet.GetSymbols(t.s2)), | |||
|
308 | m_finalStates.Contains(t.s2) ? "$" : "" | |||
|
309 | ); | |||
|
310 | } | |||
|
311 | ||||
|
312 | } | |||
|
313 | } |
@@ -13,82 +13,38 namespace Implab.Automaton { | |||||
13 | /// to the input alphabet of the automaton. It's assumed that the index to the symbol match |
|
13 | /// to the input alphabet of the automaton. It's assumed that the index to the symbol match | |
14 | /// is well known and documented. |
|
14 | /// is well known and documented. | |
15 | /// </remarks> |
|
15 | /// </remarks> | |
16 |
public abstract class IndexedAlphabetBase<T> : |
|
16 | public abstract class IndexedAlphabetBase<T> : MapAlphabet<T> { | |
17 | int m_nextId = 1; |
|
|||
18 | readonly int[] m_map; |
|
|||
19 |
|
||||
20 | protected IndexedAlphabetBase(int mapSize) { |
|
|||
21 | m_map = new int[mapSize]; |
|
|||
22 | } |
|
|||
23 |
|
||||
24 | protected IndexedAlphabetBase(int[] map) { |
|
|||
25 | Debug.Assert(map != null && map.Length > 0); |
|
|||
26 | Debug.Assert(map.All(x => x >= 0)); |
|
|||
27 |
|
||||
28 | m_map = map; |
|
|||
29 | m_nextId = map.Max() + 1; |
|
|||
30 | } |
|
|||
31 |
|
||||
32 | public int DefineSymbol(T symbol) { |
|
|||
33 | var index = GetSymbolIndex(symbol); |
|
|||
34 | if (m_map[index] == DFAConst.UNCLASSIFIED_INPUT) |
|
|||
35 | m_map[index] = m_nextId++; |
|
|||
36 | return m_map[index]; |
|
|||
37 | } |
|
|||
38 |
|
||||
39 | public int DefineSymbol(T symbol, int cls) { |
|
|||
40 | var index = GetSymbolIndex(symbol); |
|
|||
41 | m_map[index] = cls; |
|
|||
42 | m_nextId = Math.Max(cls + 1, m_nextId); |
|
|||
43 | return cls; |
|
|||
44 | } |
|
|||
45 |
|
17 | |||
46 | public int DefineClass(IEnumerable<T> symbols) { |
|
18 | protected IndexedAlphabetBase() :base(true, null) { | |
47 | return DefineClass(symbols, m_nextId); |
|
|||
48 | } |
|
|||
49 |
|
||||
50 | public int DefineClass(IEnumerable<T> symbols, int cls) { |
|
|||
51 | Safe.ArgumentNotNull(symbols, "symbols"); |
|
|||
52 | symbols = symbols.Distinct(); |
|
|||
53 |
|
||||
54 | foreach (var symbol in symbols) |
|
|||
55 | m_map[GetSymbolIndex(symbol)] = cls; |
|
|||
56 |
|
||||
57 | m_nextId = Math.Max(cls + 1, m_nextId); |
|
|||
58 |
|
||||
59 | return cls; |
|
|||
60 | } |
|
|||
61 |
|
||||
62 | public virtual int Translate(T symbol) { |
|
|||
63 | return m_map[GetSymbolIndex(symbol)]; |
|
|||
64 | } |
|
|||
65 |
|
||||
66 | public int Count { |
|
|||
67 | get { return m_nextId; } |
|
|||
68 | } |
|
|||
69 |
|
||||
70 | public bool Contains(T symbol) { |
|
|||
71 | return true; |
|
|||
72 | } |
|
|||
73 |
|
||||
74 | public IEnumerable<T> GetSymbols(int cls) { |
|
|||
75 | for (var i = 0; i < m_map.Length; i++) |
|
|||
76 | if (m_map[i] == cls) |
|
|||
77 | yield return GetSymbolByIndex(i); |
|
|||
78 | } |
|
19 | } | |
79 |
|
20 | |||
80 | public abstract int GetSymbolIndex(T symbol); |
|
21 | public abstract int GetSymbolIndex(T symbol); | |
81 |
|
22 | |||
82 | public abstract T GetSymbolByIndex(int index); |
|
|||
83 |
|
||||
84 | public abstract IEnumerable<T> InputSymbols { get; } |
|
|||
85 |
|
||||
86 | /// <summary> |
|
23 | /// <summary> | |
87 | /// Gets the translation map from the index of the symbol to it's class this is usefull for the optimized input symbols transtaion. |
|
24 | /// Gets the translation map from the index of the symbol to it's class this is usefull for the optimized input symbols transtaion. | |
88 | /// </summary> |
|
25 | /// </summary> | |
|
26 | /// <remarks> | |||
|
27 | /// The map is continous and start from the symbol with zero code. The last symbol | |||
|
28 | /// in the map is the last classified symbol in the alphabet, i.e. the map can be | |||
|
29 | /// shorter then the whole alphabet. | |||
|
30 | /// </remarks> | |||
89 | /// <returns>The translation map.</returns> |
|
31 | /// <returns>The translation map.</returns> | |
90 | public int[] GetTranslationMap() { |
|
32 | public int[] GetTranslationMap() { | |
91 | return m_map; |
|
33 | Dictionary<int,int> map = new Dictionary<int, int>(); | |
|
34 | ||||
|
35 | int max; | |||
|
36 | foreach (var p in Mappings) { | |||
|
37 | var index = GetSymbolIndex(p.Key); | |||
|
38 | max = Math.Max(max, index); | |||
|
39 | map[index] = p.Value; | |||
|
40 | } | |||
|
41 | ||||
|
42 | var result = new int[max + 1]; | |||
|
43 | ||||
|
44 | for (int i = 0; i < result.Length; i++) | |||
|
45 | map.TryGetValue(i, out result[i]); | |||
|
46 | ||||
|
47 | return result; | |||
92 | } |
|
48 | } | |
93 | } |
|
49 | } | |
94 | } |
|
50 | } |
@@ -69,9 +69,16 namespace Implab.Automaton { | |||||
69 |
|
69 | |||
70 |
|
70 | |||
71 | public IEnumerable<T> GetSymbols(int cls) { |
|
71 | public IEnumerable<T> GetSymbols(int cls) { | |
|
72 | Safe.ArgumentAssert(cls > 0, "cls"); | |||
72 | return m_map.Where(p => p.Value == cls).Select(p => p.Key); |
|
73 | return m_map.Where(p => p.Value == cls).Select(p => p.Key); | |
73 | } |
|
74 | } | |
74 | #endregion |
|
75 | #endregion | |
|
76 | ||||
|
77 | public IEnumerable<KeyValuePair<T,int>> Mappings { | |||
|
78 | get { | |||
|
79 | return m_map; | |||
|
80 | } | |||
|
81 | } | |||
75 | } |
|
82 | } | |
76 | } |
|
83 | } | |
77 |
|
84 |
@@ -66,9 +66,9 namespace Implab.Automaton.RegularExpres | |||||
66 | return Token<TTag>.New( Enumerable.Range(0, AlphabetBuilder.Count).Except(TranslateOrDie(symbols)).ToArray() ); |
|
66 | return Token<TTag>.New( Enumerable.Range(0, AlphabetBuilder.Count).Except(TranslateOrDie(symbols)).ToArray() ); | |
67 | } |
|
67 | } | |
68 |
|
68 | |||
69 |
protected abstract IAlphabetB |
|
69 | protected abstract IndexedAlphabetBase<TSymbol> CreateAlphabet(); | |
70 |
|
70 | |||
71 |
protected |
|
71 | protected ScannerContext<TTag> BuildScannerContext(Token<TTag> regexp) { | |
72 |
|
72 | |||
73 | var dfa = new RegularDFA<TSymbol, TTag>(AlphabetBuilder); |
|
73 | var dfa = new RegularDFA<TSymbol, TTag>(AlphabetBuilder); | |
74 |
|
74 | |||
@@ -80,7 +80,16 namespace Implab.Automaton.RegularExpres | |||||
80 | if (dfa.IsFinalState(dfa.InitialState)) |
|
80 | if (dfa.IsFinalState(dfa.InitialState)) | |
81 | throw new ApplicationException("The specified language contains empty token"); |
|
81 | throw new ApplicationException("The specified language contains empty token"); | |
82 |
|
82 | |||
83 |
r |
|
83 | var ab = CreateAlphabet(); | |
|
84 | var optimal = dfa.Optimize(ab); | |||
|
85 | ||||
|
86 | return new ScannerContext<TTag>( | |||
|
87 | optimal.CreateTransitionTable(), | |||
|
88 | optimal.CreateFinalStateTable(), | |||
|
89 | optimal.CreateTagTable(), | |||
|
90 | optimal.InitialState, | |||
|
91 | ab.GetTranslationMap() | |||
|
92 | ); | |||
84 | } |
|
93 | } | |
85 |
|
94 | |||
86 | } |
|
95 | } |
@@ -36,16 +36,11 namespace Implab.Automaton.RegularExpres | |||||
36 | return m_tags.TryGetValue(s, out tags) ? tags : new TTag[0]; |
|
36 | return m_tags.TryGetValue(s, out tags) ? tags : new TTag[0]; | |
37 | } |
|
37 | } | |
38 |
|
38 | |||
39 |
public |
|
39 | public TTag[][] CreateTagTable() { | |
40 |
var table = new |
|
40 | var table = new TTag[StateCount][]; | |
41 |
|
41 | |||
42 |
foreach (var |
|
42 | foreach (var pair in m_tags) | |
43 | if (table[t.s1].transitions == null) |
|
43 | table[pair.Key] = pair.Value; | |
44 | table[t.s1] = new DFAStateDescriptor<TTag>(AlphabetSize, IsFinalState(t.s1), GetStateTag(t.s1)); |
|
|||
45 | if (table[t.s2].transitions == null) |
|
|||
46 | table[t.s2] = new DFAStateDescriptor<TTag>(AlphabetSize, IsFinalState(t.s2), GetStateTag(t.s2)); |
|
|||
47 | table[t.s1].transitions[t.edge] = t.s2; |
|
|||
48 | } |
|
|||
49 |
|
44 | |||
50 | return table; |
|
45 | return table; | |
51 | } |
|
46 | } |
@@ -4,7 +4,7 using Implab.Automaton; | |||||
4 |
|
4 | |||
5 | namespace Implab.Formats { |
|
5 | namespace Implab.Formats { | |
6 | public class ByteAlphabet : IndexedAlphabetBase<byte> { |
|
6 | public class ByteAlphabet : IndexedAlphabetBase<byte> { | |
7 |
public ByteAlphabet() |
|
7 | public ByteAlphabet() { | |
8 | } |
|
8 | } | |
9 |
|
9 | |||
10 | #region implemented abstract members of IndexedAlphabetBase |
|
10 | #region implemented abstract members of IndexedAlphabetBase | |
@@ -13,10 +13,6 namespace Implab.Formats { | |||||
13 | return (int)symbol; |
|
13 | return (int)symbol; | |
14 | } |
|
14 | } | |
15 |
|
15 | |||
16 | public override byte GetSymbolByIndex(int index) { |
|
|||
17 | return (byte)index; |
|
|||
18 | } |
|
|||
19 |
|
||||
20 | public IEnumerable<byte> InputSymbols { |
|
16 | public IEnumerable<byte> InputSymbols { | |
21 | get { |
|
17 | get { | |
22 | return Enumerable.Range(byte.MinValue, byte.MaxValue).Cast<byte>(); |
|
18 | return Enumerable.Range(byte.MinValue, byte.MaxValue).Cast<byte>(); |
@@ -5,19 +5,14 using Implab.Automaton; | |||||
5 | namespace Implab.Formats { |
|
5 | namespace Implab.Formats { | |
6 | public class CharAlphabet: IndexedAlphabetBase<char> { |
|
6 | public class CharAlphabet: IndexedAlphabetBase<char> { | |
7 |
|
7 | |||
8 | public CharAlphabet() |
|
8 | public CharAlphabet() { | |
9 | : base(char.MaxValue + 1) { |
|
|||
10 | } |
|
9 | } | |
11 |
|
10 | |||
12 | public override int GetSymbolIndex(char symbol) { |
|
11 | public override int GetSymbolIndex(char symbol) { | |
13 | return symbol; |
|
12 | return symbol; | |
14 | } |
|
13 | } | |
15 |
|
14 | |||
16 |
public |
|
15 | public IEnumerable<char> InputSymbols { | |
17 | return (char)index; |
|
|||
18 | } |
|
|||
19 |
|
||||
20 | public override IEnumerable<char> InputSymbols { |
|
|||
21 | get { return Enumerable.Range(char.MinValue, char.MaxValue).Cast<char>(); } |
|
16 | get { return Enumerable.Range(char.MinValue, char.MaxValue).Cast<char>(); } | |
22 | } |
|
17 | } | |
23 | } |
|
18 | } |
@@ -20,14 +20,7 namespace Implab.Formats.JSON { | |||||
20 | StringBound, |
|
20 | StringBound, | |
21 | EscapedChar, |
|
21 | EscapedChar, | |
22 | UnescapedChar, |
|
22 | UnescapedChar, | |
23 |
EscapedUnicode |
|
23 | EscapedUnicode | |
24 |
|
||||
25 | Minus, |
|
|||
26 | Plus, |
|
|||
27 | Sign, |
|
|||
28 | Integer, |
|
|||
29 | Dot, |
|
|||
30 | Exp |
|
|||
31 | } |
|
24 | } | |
32 |
|
25 | |||
33 | static Lazy<JSONGrammar> _instance = new Lazy<JSONGrammar>(); |
|
26 | static Lazy<JSONGrammar> _instance = new Lazy<JSONGrammar>(); | |
@@ -36,8 +29,8 namespace Implab.Formats.JSON { | |||||
36 | get { return _instance.Value; } |
|
29 | get { return _instance.Value; } | |
37 | } |
|
30 | } | |
38 |
|
31 | |||
39 |
readonly |
|
32 | readonly ScannerContext<TokenType> m_jsonDFA; | |
40 |
readonly |
|
33 | readonly ScannerContext<TokenType> m_stringDFA; | |
41 |
|
34 | |||
42 | public JSONGrammar() { |
|
35 | public JSONGrammar() { | |
43 | DefineAlphabet(Enumerable.Range(0, 0x20).Select(x => (char)x)); |
|
36 | DefineAlphabet(Enumerable.Range(0, 0x20).Select(x => (char)x)); | |
@@ -88,17 +81,17 namespace Implab.Formats.JSON { | |||||
88 | .Or(unescaped.Closure().Tag(TokenType.UnescapedChar)); |
|
81 | .Or(unescaped.Closure().Tag(TokenType.UnescapedChar)); | |
89 |
|
82 | |||
90 |
|
83 | |||
91 |
m_jsonDFA = Build |
|
84 | m_jsonDFA = BuildScannerContext(jsonExpression); | |
92 |
m_stringDFA = Build |
|
85 | m_stringDFA = BuildScannerContext(jsonStringExpression); | |
93 | } |
|
86 | } | |
94 |
|
87 | |||
95 |
public |
|
88 | public ScannerContext<TokenType> JsonDFA { | |
96 | get { |
|
89 | get { | |
97 | return m_jsonDFA; |
|
90 | return m_jsonDFA; | |
98 | } |
|
91 | } | |
99 | } |
|
92 | } | |
100 |
|
93 | |||
101 |
public |
|
94 | public ScannerContext<TokenType> JsonStringDFA { | |
102 | get { |
|
95 | get { | |
103 | return m_stringDFA; |
|
96 | return m_stringDFA; | |
104 | } |
|
97 | } |
@@ -1,25 +1,37 | |||||
1 | using System; |
|
1 | using System; | |
2 | using System.Globalization; |
|
2 | using System.Globalization; | |
3 | using Implab.Automaton; |
|
3 | using Implab.Automaton; | |
|
4 | using System.Text; | |||
|
5 | using Implab.Components; | |||
|
6 | using System.IO; | |||
|
7 | using Implab.Automaton.RegularExpressions; | |||
4 |
|
8 | |||
5 | namespace Implab.Formats.JSON { |
|
9 | namespace Implab.Formats.JSON { | |
6 | /// <summary> |
|
10 | /// <summary> | |
7 | /// Сканнер (лексер), разбивающий поток символов на токены JSON. |
|
11 | /// Сканнер (лексер), разбивающий поток символов на токены JSON. | |
8 | /// </summary> |
|
12 | /// </summary> | |
9 |
public class JSONScanner : |
|
13 | public class JSONScanner : Disposable { | |
10 | char[] m_stringBuffer; |
|
14 | readonly StringBuilder m_builder = new StringBuilder(); | |
11 | DFAStateDescriptior<>[] m_stringDFA; |
|
15 | ||
12 | int[] m_stringAlphabet; |
|
16 | readonly ScannerContext<JSONGrammar.TokenType> m_jsonScanner = JSONGrammar.Instance.JsonDFA; | |
|
17 | readonly ScannerContext<JSONGrammar.TokenType> m_stringScanner = JSONGrammar.Instance.JsonStringDFA; | |||
|
18 | ||||
|
19 | ||||
|
20 | readonly TextScanner m_scanner; | |||
13 |
|
21 | |||
14 | /// <summary> |
|
22 | /// <summary> | |
15 | /// Создает новый экземпляр сканнера |
|
23 | /// Создает новый экземпляр сканнера | |
16 | /// </summary> |
|
24 | /// </summary> | |
17 | public JSONScanner() |
|
25 | public JSONScanner(string text) { | |
18 | : base(JSONGrammar.Instance.JsonDFA.GetTransitionTable(), JSONGrammar.Instance.JsonDFA.Alphabet.GetTranslationMap()) { |
|
26 | Safe.ArgumentNotEmpty(text, "text"); | |
19 | m_stringBuffer = new char[1024]; |
|
27 | ||
20 | var dfa = JSONGrammar.Instance.JsonStringDFA; |
|
28 | m_scanner = new StringScanner(text); | |
21 | m_stringAlphabet = dfa.Alphabet.GetTranslationMap(); |
|
29 | } | |
22 | m_stringDFA = dfa.States; |
|
30 | ||
|
31 | public JSONScanner(TextReader reader, int bufferMax, int chunkSize) { | |||
|
32 | Safe.ArgumentNotNull(reader, "reader"); | |||
|
33 | ||||
|
34 | m_scanner = new ReaderScanner(reader); | |||
23 | } |
|
35 | } | |
24 |
|
36 | |||
25 | /// <summary> |
|
37 | /// <summary> | |
@@ -31,19 +43,20 namespace Implab.Formats.JSON { | |||||
31 | /// <remarks>В случе если токен не распознается, возникает исключение. Значения токенов обрабатываются, т.е. |
|
43 | /// <remarks>В случе если токен не распознается, возникает исключение. Значения токенов обрабатываются, т.е. | |
32 | /// в строках обрабатываются экранированные символы, числа становтся типа double.</remarks> |
|
44 | /// в строках обрабатываются экранированные символы, числа становтся типа double.</remarks> | |
33 | public bool ReadToken(out object tokenValue, out JsonTokenType tokenType) { |
|
45 | public bool ReadToken(out object tokenValue, out JsonTokenType tokenType) { | |
34 | if (ReadTokenInternal()) { |
|
46 | JSONGrammar.TokenType[] tag; | |
35 | switch ((JSONGrammar.TokenType)m_currentState.tag[0]) { |
|
47 | if (m_jsonScanner.Execute(m_scanner, out tag)) { | |
|
48 | switch (tag[0]) { | |||
36 | case JSONGrammar.TokenType.StringBound: |
|
49 | case JSONGrammar.TokenType.StringBound: | |
37 | tokenValue = ReadString(); |
|
50 | tokenValue = ReadString(); | |
38 | tokenType = JsonTokenType.String; |
|
51 | tokenType = JsonTokenType.String; | |
39 | break; |
|
52 | break; | |
40 | case JSONGrammar.TokenType.Number: |
|
53 | case JSONGrammar.TokenType.Number: | |
41 |
tokenValue = Double.Parse( |
|
54 | tokenValue = Double.Parse(m_scanner.GetTokenValue(), CultureInfo.InvariantCulture); | |
42 | tokenType = JsonTokenType.Number; |
|
55 | tokenType = JsonTokenType.Number; | |
43 | break; |
|
56 | break; | |
44 | default: |
|
57 | default: | |
45 |
tokenType = (JsonTokenType) |
|
58 | tokenType = (JsonTokenType)tag[0]; | |
46 |
tokenValue = |
|
59 | tokenValue = m_scanner.GetTokenValue(); | |
47 | break; |
|
60 | break; | |
48 | } |
|
61 | } | |
49 | return true; |
|
62 | return true; | |
@@ -55,26 +68,26 namespace Implab.Formats.JSON { | |||||
55 |
|
68 | |||
56 | string ReadString() { |
|
69 | string ReadString() { | |
57 | int pos = 0; |
|
70 | int pos = 0; | |
58 | Switch(m_stringDFA, m_stringAlphabet); |
|
71 | char[] buf = new char[6]; // the buffer for unescaping chars | |
59 | while (ReadTokenInternal()) { |
|
72 | ||
60 |
|
|
73 | JSONGrammar.TokenType[] tag; | |
|
74 | m_builder.Clear(); | |||
|
75 | ||||
|
76 | while (m_stringScanner.Execute(m_scanner, out tag)) { | |||
|
77 | switch (tag[0]) { | |||
61 | case JSONGrammar.TokenType.StringBound: |
|
78 | case JSONGrammar.TokenType.StringBound: | |
62 |
|
|
79 | return m_builder.ToString(); | |
63 | return new String(m_stringBuffer, 0, pos); |
|
|||
64 | case JSONGrammar.TokenType.UnescapedChar: |
|
80 | case JSONGrammar.TokenType.UnescapedChar: | |
65 | EnsureStringBufferSize(pos + m_tokenLen); |
|
81 | m_scanner.CopyTokenTo(m_builder); | |
66 | Array.Copy(m_buffer, m_tokenOffset, m_stringBuffer, pos, m_tokenLen); |
|
|||
67 | pos += m_tokenLen; |
|
|||
68 | break; |
|
82 | break; | |
69 | case JSONGrammar.TokenType.EscapedUnicode: |
|
83 | case JSONGrammar.TokenType.EscapedUnicode: // \xXXXX - unicode escape sequence | |
70 | EnsureStringBufferSize(pos + 1); |
|
84 | m_scanner.CopyTokenTo(buf, 0); | |
71 |
m_ |
|
85 | m_builder.Append(StringTranslator.TranslateHexUnicode(buf, 2)); | |
72 | pos++; |
|
86 | pos++; | |
73 | break; |
|
87 | break; | |
74 | case JSONGrammar.TokenType.EscapedChar: |
|
88 | case JSONGrammar.TokenType.EscapedChar: // \t - escape sequence | |
75 |
|
|
89 | m_scanner.CopyTokenTo(buf, 0); | |
76 |
m_ |
|
90 | m_builder.Append(StringTranslator.TranslateEscapedChar(buf[1])); | |
77 | pos++; |
|
|||
78 | break; |
|
91 | break; | |
79 | default: |
|
92 | default: | |
80 | break; |
|
93 | break; | |
@@ -84,13 +97,5 namespace Implab.Formats.JSON { | |||||
84 |
|
97 | |||
85 | throw new ParserException("Unexpected end of data"); |
|
98 | throw new ParserException("Unexpected end of data"); | |
86 | } |
|
99 | } | |
87 |
|
||||
88 | void EnsureStringBufferSize(int size) { |
|
|||
89 | if (size > m_stringBuffer.Length) { |
|
|||
90 | var newBuffer = new char[size]; |
|
|||
91 | m_stringBuffer.CopyTo(newBuffer, 0); |
|
|||
92 | m_stringBuffer = newBuffer; |
|
|||
93 | } |
|
|||
94 | } |
|
|||
95 | } |
|
100 | } | |
96 | } |
|
101 | } |
@@ -1,5 +1,5 | |||||
1 | using Implab; |
|
1 | using Implab; | |
2 |
using Implab. |
|
2 | using Implab.Formats; | |
3 | using System; |
|
3 | using System; | |
4 | using System.Collections.Generic; |
|
4 | using System.Collections.Generic; | |
5 | using System.Diagnostics; |
|
5 | using System.Diagnostics; | |
@@ -7,11 +7,11 using System.Linq; | |||||
7 | using System.Text; |
|
7 | using System.Text; | |
8 | using System.Threading.Tasks; |
|
8 | using System.Threading.Tasks; | |
9 |
|
9 | |||
10 | namespace Implab.JSON { |
|
10 | namespace Implab.Formats.JSON { | |
11 | /// <summary> |
|
11 | /// <summary> | |
12 | /// Класс для преобразования экранированной строки JSON |
|
12 | /// Класс для преобразования экранированной строки JSON | |
13 | /// </summary> |
|
13 | /// </summary> | |
14 | public class StringTranslator : Scanner { |
|
14 | public class StringTranslator : TextScanner<JSONGrammar.TokenType> { | |
15 | static readonly char[] _escMap; |
|
15 | static readonly char[] _escMap; | |
16 | static readonly int[] _hexMap; |
|
16 | static readonly int[] _hexMap; | |
17 |
|
17 | |||
@@ -34,8 +34,7 namespace Implab.JSON { | |||||
34 |
|
34 | |||
35 | } |
|
35 | } | |
36 |
|
36 | |||
37 | public StringTranslator() |
|
37 | public StringTranslator() { | |
38 | : base(JSONGrammar.Instance.JsonStringDFA.States, JSONGrammar.Instance.JsonStringDFA.Alphabet.GetTranslationMap()) { |
|
|||
39 | } |
|
38 | } | |
40 |
|
39 | |||
41 | public string Translate(string data) { |
|
40 | public string Translate(string data) { | |
@@ -59,7 +58,7 namespace Implab.JSON { | |||||
59 | int pos = 0; |
|
58 | int pos = 0; | |
60 |
|
59 | |||
61 | while (ReadTokenInternal()) { |
|
60 | while (ReadTokenInternal()) { | |
62 |
switch ((JSONGrammar.TokenType) |
|
61 | switch ((JSONGrammar.TokenType)Tags[0]) { | |
63 | case JSONGrammar.TokenType.UnescapedChar: |
|
62 | case JSONGrammar.TokenType.UnescapedChar: | |
64 | Array.Copy(m_buffer,m_tokenOffset,translated,pos,m_tokenLen); |
|
63 | Array.Copy(m_buffer,m_tokenOffset,translated,pos,m_tokenLen); | |
65 | pos += m_tokenLen; |
|
64 | pos += m_tokenLen; |
@@ -3,50 +3,146 using Implab.Components; | |||||
3 | using Implab.Automaton.RegularExpressions; |
|
3 | using Implab.Automaton.RegularExpressions; | |
4 | using System.Diagnostics; |
|
4 | using System.Diagnostics; | |
5 | using Implab.Automaton; |
|
5 | using Implab.Automaton; | |
|
6 | using System.IO; | |||
|
7 | using System.Text; | |||
6 |
|
8 | |||
7 | namespace Implab.Formats { |
|
9 | namespace Implab.Formats { | |
8 |
public abstract class TextScanner |
|
10 | public abstract class TextScanner : Disposable { | |
|
11 | readonly int m_bufferMax; | |||
|
12 | readonly int m_chunkSize; | |||
9 |
|
13 | |||
10 | int m_maxSymbol; |
|
14 | char[] m_buffer; | |
11 | int[] m_symbolMap; |
|
|||
12 |
|
||||
13 | readonly char[] m_buffer; |
|
|||
14 | int m_bufferOffset; |
|
15 | int m_bufferOffset; | |
15 | int m_bufferSize; |
|
16 | int m_bufferSize; | |
|
17 | int m_tokenOffset; | |||
16 | int m_tokenLength; |
|
18 | int m_tokenLength; | |
17 |
|
19 | |||
18 | TTag[] m_tags; |
|
20 | /// <summary> | |
|
21 | /// Initializes a new instance of the <see cref="Implab.Formats.TextScanner`1"/> class. | |||
|
22 | /// </summary> | |||
|
23 | /// <param name="bufferMax">Buffer max.</param> | |||
|
24 | /// <param name="chunkSize">Chunk size.</param> | |||
|
25 | protected TextScanner(int bufferMax, int chunkSize) { | |||
|
26 | Debug.Assert(m_chunkSize <= m_bufferMax); | |||
|
27 | ||||
|
28 | m_bufferMax = bufferMax; | |||
|
29 | m_chunkSize = chunkSize; | |||
|
30 | } | |||
19 |
|
31 | |||
20 | protected bool ReadTokenInternal(DFAStateDescriptor<TTag>[] dfa, int state) { |
|
32 | /// <summary> | |
21 | Debug.Assert(dfa != null); |
|
33 | /// Initializes a new instance of the <see cref="Implab.Formats.TextScanner`1"/> class. | |
|
34 | /// </summary> | |||
|
35 | /// <param name="buffer">Buffer.</param> | |||
|
36 | protected TextScanner(char[] buffer) { | |||
|
37 | if (buffer != null) { | |||
|
38 | m_buffer = buffer; | |||
|
39 | m_bufferSize = buffer.Length; | |||
|
40 | } | |||
|
41 | } | |||
|
42 | ||||
|
43 | /// <summary> | |||
|
44 | /// (hungry) Reads the next token. | |||
|
45 | /// </summary> | |||
|
46 | /// <returns><c>true</c>, if token internal was read, <c>false</c> if there is no more tokens in the stream.</returns> | |||
|
47 | /// <param name="dfa">The transition map for the automaton</param> | |||
|
48 | /// <param name="final">Final states of the automaton.</param> | |||
|
49 | /// <param name="tags">Tags.</param> | |||
|
50 | /// <param name="state">The initial state for the automaton.</param> | |||
|
51 | internal bool ReadToken<TTag>(int[,] dfa, int[] final, TTag[][] tags, int state, int[] alphabet, out TTag[] tag) { | |||
|
52 | Safe.ArgumentNotNull(); | |||
|
53 | m_tokenLength = 0; | |||
|
54 | ||||
|
55 | var maxSymbol = alphabet.Length - 1; | |||
22 |
|
56 | |||
23 | do { |
|
57 | do { | |
24 | for (var pos = m_bufferOffset; pos < m_bufferSize; pos++) { |
|
58 | // after the next chunk is read the offset in the buffer may change | |
|
59 | int pos = m_bufferOffset + m_tokenLength; | |||
|
60 | ||||
|
61 | while(pos < m_bufferSize) { | |||
25 | var ch = m_buffer[pos]; |
|
62 | var ch = m_buffer[pos]; | |
26 | state = dfa[state].transitions[m_symbolMap[ch > m_maxSymbol ? m_maxSymbol : ch]]; |
|
63 | ||
|
64 | state = dfa[state,ch > maxSymbol ? DFAConst.UNCLASSIFIED_INPUT : alphabet[ch]]; | |||
27 | if (state == DFAConst.UNREACHABLE_STATE) |
|
65 | if (state == DFAConst.UNREACHABLE_STATE) | |
28 | break; |
|
66 | break; | |
|
67 | ||||
|
68 | pos++; | |||
29 | } |
|
69 | } | |
30 | } while (Feed()); |
|
70 | ||
|
71 | m_tokenLength = pos - m_bufferOffset; | |||
|
72 | } while (state != DFAConst.UNREACHABLE_STATE && Feed()); | |||
|
73 | ||||
|
74 | m_tokenOffset = m_bufferOffset; | |||
|
75 | m_bufferOffset += m_tokenLength; | |||
31 |
|
76 | |||
32 |
if ( |
|
77 | if (final[state]) { | |
|
78 | tag = tags[state]; | |||
|
79 | return true; | |||
|
80 | } else { | |||
|
81 | if (m_bufferOffset == m_bufferSize) { | |||
|
82 | if (m_tokenLength == 0) //EOF | |||
|
83 | return false; | |||
|
84 | ||||
|
85 | throw new ParserException(); | |||
|
86 | } | |||
|
87 | throw new ParserException(String.Format("Unexpected symbol '{0}'", m_buffer[m_bufferOffset])); | |||
|
88 | ||||
|
89 | } | |||
|
90 | } | |||
33 |
|
91 | |||
34 | } |
|
92 | protected void Feed(char[] buffer, int offset, int length) { | |
35 |
|
93 | m_buffer = buffer; | ||
|
94 | m_bufferOffset = offset; | |||
|
95 | m_bufferSize = offset + length; | |||
36 | } |
|
96 | } | |
37 |
|
97 | |||
38 | bool Feed() { |
|
98 | protected bool Feed() { | |
|
99 | if (m_chunkSize <= 0) | |||
|
100 | return false; | |||
|
101 | ||||
|
102 | if (m_buffer != null) { | |||
|
103 | var free = m_buffer.Length - m_bufferSize; | |||
|
104 | ||||
|
105 | if (free < m_chunkSize) { | |||
|
106 | free += m_chunkSize; | |||
|
107 | var used = m_bufferSize - m_bufferOffset; | |||
|
108 | var size = used + free; | |||
|
109 | ||||
|
110 | if (size > m_bufferMax) | |||
|
111 | throw new ParserException(String.Format("The buffer limit ({0} Kb) is reached"), m_bufferMax/1024); | |||
|
112 | ||||
|
113 | var temp = new char[size]; | |||
39 |
|
114 | |||
|
115 | var read = Read(temp, used, m_chunkSize); | |||
|
116 | if (read == 0) | |||
|
117 | return false; | |||
|
118 | ||||
|
119 | Array.Copy(m_buffer, m_bufferOffset, temp, 0, used); | |||
|
120 | ||||
|
121 | m_bufferOffset = 0; | |||
|
122 | m_bufferSize = used + read; | |||
|
123 | m_buffer = temp; | |||
|
124 | } | |||
|
125 | } else { | |||
|
126 | Debug.Assert(m_bufferOffset == 0); | |||
|
127 | m_buffer = new char[m_chunkSize]; | |||
|
128 | m_bufferSize = Read(m_buffer, 0, m_chunkSize); | |||
|
129 | return (m_bufferSize != 0); | |||
|
130 | } | |||
40 | } |
|
131 | } | |
41 |
|
132 | |||
42 | protected abstract int Read(char[] buffer, int offset, int size); |
|
133 | protected abstract int Read(char[] buffer, int offset, int size); | |
43 |
|
134 | |||
44 | protected TTag[] Tags { |
|
135 | public string GetTokenValue() { | |
45 | get { |
|
136 | return new String(m_buffer, m_tokenOffset, m_tokenLength); | |
46 | return m_tags; |
|
|||
47 | } |
|
|||
48 | } |
|
137 | } | |
49 |
|
138 | |||
|
139 | public void CopyTokenTo(char[] buffer, int offset) { | |||
|
140 | m_buffer.CopyTo(buffer, offset); | |||
|
141 | } | |||
|
142 | ||||
|
143 | public void CopyTokenTo(StringBuilder sb) { | |||
|
144 | sb.Append(m_buffer, m_tokenOffset, m_tokenLength); | |||
|
145 | } | |||
50 |
|
146 | |||
51 | } |
|
147 | } | |
52 | } |
|
148 | } |
@@ -151,11 +151,9 | |||||
151 | <Compile Include="Components\ExecutionState.cs" /> |
|
151 | <Compile Include="Components\ExecutionState.cs" /> | |
152 | <Compile Include="Components\RunnableComponent.cs" /> |
|
152 | <Compile Include="Components\RunnableComponent.cs" /> | |
153 | <Compile Include="Components\IFactory.cs" /> |
|
153 | <Compile Include="Components\IFactory.cs" /> | |
154 | <Compile Include="Automaton\DFAStateDescriptor.cs" /> |
|
|||
155 | <Compile Include="Automaton\EnumAlphabet.cs" /> |
|
154 | <Compile Include="Automaton\EnumAlphabet.cs" /> | |
156 | <Compile Include="Automaton\IAlphabet.cs" /> |
|
155 | <Compile Include="Automaton\IAlphabet.cs" /> | |
157 | <Compile Include="Automaton\ParserException.cs" /> |
|
156 | <Compile Include="Automaton\ParserException.cs" /> | |
158 | <Compile Include="Automaton\Scanner.cs" /> |
|
|||
159 | <Compile Include="Automaton\IndexedAlphabetBase.cs" /> |
|
157 | <Compile Include="Automaton\IndexedAlphabetBase.cs" /> | |
160 | <Compile Include="Automaton\IAlphabetBuilder.cs" /> |
|
158 | <Compile Include="Automaton\IAlphabetBuilder.cs" /> | |
161 | <Compile Include="Automaton\RegularExpressions\AltToken.cs" /> |
|
159 | <Compile Include="Automaton\RegularExpressions\AltToken.cs" /> | |
@@ -190,9 +188,10 | |||||
190 | <Compile Include="Automaton\RegularExpressions\RegularDFA.cs" /> |
|
188 | <Compile Include="Automaton\RegularExpressions\RegularDFA.cs" /> | |
191 | <Compile Include="Automaton\RegularExpressions\RegularExpressionVisitor.cs" /> |
|
189 | <Compile Include="Automaton\RegularExpressions\RegularExpressionVisitor.cs" /> | |
192 | <Compile Include="Automaton\RegularExpressions\ITaggedDFABuilder.cs" /> |
|
190 | <Compile Include="Automaton\RegularExpressions\ITaggedDFABuilder.cs" /> | |
193 | <Compile Include="Automaton\RegularExpressions\DFAStateDescriptorT.cs" /> |
|
|||
194 | <Compile Include="Formats\BufferScanner.cs" /> |
|
|||
195 | <Compile Include="Formats\TextScanner.cs" /> |
|
191 | <Compile Include="Formats\TextScanner.cs" /> | |
|
192 | <Compile Include="Formats\StringScanner.cs" /> | |||
|
193 | <Compile Include="Formats\ReaderScanner.cs" /> | |||
|
194 | <Compile Include="Formats\ScannerContext.cs" /> | |||
196 | </ItemGroup> |
|
195 | </ItemGroup> | |
197 | <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" /> |
|
196 | <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" /> | |
198 | <ItemGroup /> |
|
197 | <ItemGroup /> |
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