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1 using System;
2
3 namespace Implab.Automaton.RegularExpressions {
4 public interface ITaggedDFABuilder<TTag> : IDFATableBuilder {
5 void SetStateTag(int s, TTag[] tags);
6 }
7 }
8
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@@ -0,0 +1,89
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4
5 namespace Implab.Automaton.RegularExpressions {
6 public class RegularDFA<TInput, TTag> : DFATable, ITaggedDFABuilder<TTag> {
7
8 readonly Dictionary<int,TTag[]> m_tags = new Dictionary<int, TTag[]>();
9 readonly IAlphabet<TInput> m_alphabet;
10
11 public RegularDFA(IAlphabet<TInput> alphabet) {
12 Safe.ArgumentNotNull(alphabet, "aplhabet");
13
14 m_alphabet = alphabet;
15 }
16
17
18 public IAlphabet<TInput> InputAlphabet {
19 get {
20 return m_alphabet;
21 }
22 }
23
24 public void MarkFinalState(int s, TTag[] tags) {
25 MarkFinalState(s);
26 SetStateTag(s, tags);
27 }
28
29 public void SetStateTag(int s, TTag[] tags) {
30 Safe.ArgumentNotNull(tags, "tags");
31 m_tags[s] = tags;
32 }
33
34 public TTag[] GetStateTag(int s) {
35 TTag[] tags;
36 return m_tags.TryGetValue(s, out tags) ? tags : new TTag[0];
37 }
38
39 public new DFAStateDescriptor<TTag>[] CreateTransitionTable() {
40 var table = new DFAStateDescriptor<TTag>[StateCount];
41
42 foreach (var t in this) {
43 if (table[t.s1].transitions == null)
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
50 return table;
51 }
52
53 /// <summary>
54 /// Optimize the specified alphabet.
55 /// </summary>
56 /// <param name="alphabet">Пустой алфавит, который будет зполнен в процессе оптимизации.</param>
57 public RegularDFA<TInput,TTag> Optimize(IAlphabetBuilder<TInput> alphabet) {
58 Safe.ArgumentNotNull(alphabet, "alphabet");
59
60 var dfa = new RegularDFA<TInput, TTag>(alphabet);
61
62 var states = new DummyAlphabet(StateCount);
63 var alphaMap = new Dictionary<int,int>();
64 var stateMap = new Dictionary<int,int>();
65
66 Optimize(dfa, alphaMap, stateMap);
67
68 // mark tags in the new DFA
69 foreach (var g in m_tags.Where(x => x.Key < StateCount).GroupBy(x => stateMap[x.Key], x => x.Value ))
70 dfa.SetStateTag(g.Key, g.SelectMany(x => x).ToArray());
71
72 // make the alphabet for the new DFA
73 foreach (var pair in alphaMap)
74 alphabet.DefineClass(m_alphabet.GetSymbols(pair.Key), pair.Value);
75
76 return dfa;
77 }
78
79 protected override IEnumerable<HashSet<int>> GroupFinalStates() {
80 var arrayComparer = new CustomEqualityComparer<TTag[]>(
81 (x,y) => x.Length == y.Length && x.All(it => y.Contains(it)),
82 x => x.Sum(it => x.GetHashCode())
83 );
84 return FinalStates.GroupBy(x => m_tags[x], arrayComparer).Select(g => new HashSet<int>(g));
85 }
86
87 }
88 }
89
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@@ -0,0 +1,184
1 using Implab;
2 using System;
3 using System.Collections.Generic;
4 using System.Diagnostics;
5 using System.Linq;
6
7 namespace Implab.Automaton.RegularExpressions {
8 /// <summary>
9 /// Используется для построения ДКА по регулярному выражению, сначала обходит
10 /// регулярное выражение и вычисляет followpos, затем используется метод
11 /// <see cref="BuildDFA(IDFADefinition)"/> для построения автомата.
12 /// </summary>
13 public class RegularExpressionVisitor<TTag> : IVisitor<TTag> {
14 int m_idx;
15 Token<TTag> m_root;
16 HashSet<int> m_firstpos;
17 HashSet<int> m_lastpos;
18
19 readonly Dictionary<int, HashSet<int>> m_followpos = new Dictionary<int, HashSet<int>>();
20 readonly Dictionary<int, int> m_indexes = new Dictionary<int, int>();
21 readonly Dictionary<int, TTag> m_ends = new Dictionary<int, TTag>();
22
23 public Dictionary<int, HashSet<int>> FollowposMap {
24 get { return m_followpos; }
25 }
26
27 public HashSet<int> Followpos(int pos) {
28 HashSet<int> set;
29 return m_followpos.TryGetValue(pos, out set) ? set : m_followpos[pos] = new HashSet<int>();
30 }
31
32 bool Nullable(object n) {
33 if (n is EmptyToken<TTag> || n is StarToken<TTag>)
34 return true;
35 var altToken = n as AltToken<TTag>;
36 if (altToken != null)
37 return Nullable(altToken.Left) || Nullable(altToken.Right);
38 var catToken = n as CatToken<TTag>;
39 if (catToken != null)
40 return Nullable(catToken.Left) && Nullable(catToken.Right);
41 return false;
42 }
43
44
45 public void Visit(AltToken<TTag> token) {
46 if (m_root == null)
47 m_root = token;
48 var firtspos = new HashSet<int>();
49 var lastpos = new HashSet<int>();
50
51 token.Left.Accept(this);
52 firtspos.UnionWith(m_firstpos);
53 lastpos.UnionWith(m_lastpos);
54
55 token.Right.Accept(this);
56 firtspos.UnionWith(m_firstpos);
57 lastpos.UnionWith(m_lastpos);
58
59 m_firstpos = firtspos;
60 m_lastpos = lastpos;
61 }
62
63 public void Visit(StarToken<TTag> token) {
64 if (m_root == null)
65 m_root = token;
66 token.Token.Accept(this);
67
68 foreach (var i in m_lastpos)
69 Followpos(i).UnionWith(m_firstpos);
70 }
71
72 public void Visit(CatToken<TTag> token) {
73 if (m_root == null)
74 m_root = token;
75
76 var firtspos = new HashSet<int>();
77 var lastpos = new HashSet<int>();
78 token.Left.Accept(this);
79 firtspos.UnionWith(m_firstpos);
80 var leftLastpos = m_lastpos;
81
82 token.Right.Accept(this);
83 lastpos.UnionWith(m_lastpos);
84 var rightFirstpos = m_firstpos;
85
86 if (Nullable(token.Left))
87 firtspos.UnionWith(rightFirstpos);
88
89 if (Nullable(token.Right))
90 lastpos.UnionWith(leftLastpos);
91
92 m_firstpos = firtspos;
93 m_lastpos = lastpos;
94
95 foreach (var i in leftLastpos)
96 Followpos(i).UnionWith(rightFirstpos);
97
98 }
99
100 public void Visit(EmptyToken<TTag> token) {
101 if (m_root == null)
102 m_root = token;
103 }
104
105 public void Visit(SymbolToken<TTag> token) {
106 if (m_root == null)
107 m_root = token;
108 m_idx++;
109 m_indexes[m_idx] = token.Value;
110 m_firstpos = new HashSet<int>(new[] { m_idx });
111 m_lastpos = new HashSet<int>(new[] { m_idx });
112 }
113
114 public void Visit(EndToken<TTag> token) {
115 if (m_root == null)
116 m_root = token;
117 m_idx++;
118 m_indexes[m_idx] = DFAConst.UNCLASSIFIED_INPUT;
119 m_firstpos = new HashSet<int>(new[] { m_idx });
120 m_lastpos = new HashSet<int>(new[] { m_idx });
121 Followpos(m_idx);
122 m_ends.Add(m_idx, token.Tag);
123 }
124
125 public void BuildDFA(ITaggedDFABuilder<TTag> dfa) {
126 Safe.ArgumentNotNull(dfa,"dfa");
127
128 var states = new MapAlphabet<HashSet<int>>(
129 false,
130 new CustomEqualityComparer<HashSet<int>>(
131 (x, y) => x.SetEquals(y),
132 x => x.Sum(n => n.GetHashCode())
133 ));
134
135 var initialState = states.DefineSymbol(m_firstpos);
136 dfa.SetInitialState(initialState);
137
138 var tags = GetStateTags(m_firstpos);
139 if (tags != null && tags.Length > 0)
140 dfa.MarkFinalState(initialState, tags);
141
142 var inputMax = m_indexes.Values.Max();
143 var queue = new Queue<HashSet<int>>();
144
145 queue.Enqueue(m_firstpos);
146
147 while (queue.Count > 0) {
148 var state = queue.Dequeue();
149 var s1 = states.Translate(state);
150 Debug.Assert(s1 != DFAConst.UNCLASSIFIED_INPUT);
151
152 for (int a = 0; a <= inputMax; a++) {
153 var next = new HashSet<int>();
154 foreach (var p in state) {
155 if (m_indexes[p] == a) {
156 next.UnionWith(Followpos(p));
157 }
158 }
159 if (next.Count > 0) {
160 int s2 = states.Translate(next);
161 if (s2 == DFAConst.UNCLASSIFIED_INPUT) {
162 s2 = states.DefineSymbol(next);
163
164 tags = GetStateTags(next);
165 if (tags != null && tags.Length > 0) {
166 dfa.MarkFinalState(s2);
167 dfa.SetStateTag(s2, tags);
168 }
169
170 queue.Enqueue(next);
171 }
172 dfa.Add(new AutomatonTransition(s1, s2, a));
173 }
174 }
175 }
176 }
177
178 TTag[] GetStateTags(IEnumerable<int> state) {
179 Debug.Assert(state != null);
180 return state.Where(m_ends.ContainsKey).Select(pos => m_ends[pos]).ToArray();
181 }
182
183 }
184 }
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@@ -1,18 +1,18
1 namespace Implab.Automaton {
1 namespace Implab.Automaton {
2 public struct DFAStateDescriptior {
2 public struct DFAStateDescriptor {
3 public readonly bool final;
3 public readonly bool final;
4 public readonly int[] transitions;
4 public readonly int[] transitions;
5
5
6
6
7 public DFAStateDescriptior(int[] transitions, bool final) {
7 public DFAStateDescriptor(int[] transitions, bool final) {
8 this.transitions = transitions;
8 this.transitions = transitions;
9 this.final = final;
9 this.final = final;
10 }
10 }
11
11
12 public DFAStateDescriptior(int[] transitions) : this(transitions, false) {
12 public DFAStateDescriptor(int[] transitions) : this(transitions, false) {
13 }
13 }
14
14
15 public DFAStateDescriptior(int size, bool final) {
15 public DFAStateDescriptor(int size, bool final) {
16 Safe.ArgumentInRange(size, 0, int.MaxValue, "size");
16 Safe.ArgumentInRange(size, 0, int.MaxValue, "size");
17
17
18 this.final = final;
18 this.final = final;
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@@ -100,6 +100,20 namespace Implab.Automaton {
100 return GetEnumerator();
100 return GetEnumerator();
101 }
101 }
102
102
103 public DFAStateDescriptor[] CreateTransitionTable() {
104 var table = new DFAStateDescriptor[StateCount];
105
106 foreach (var t in this) {
107 if (table[t.s1].transitions == null)
108 table[t.s1] = new DFAStateDescriptor(AlphabetSize, IsFinalState(t.s1));
109 if (table[t.s2].transitions == null)
110 table[t.s2] = new DFAStateDescriptor(AlphabetSize, IsFinalState(t.s2));
111 table[t.s1].transitions[t.edge] = t.s2;
112 }
113
114 return table;
115 }
116
103 /// <summary>Формирует множества конечных состояний перед началом работы алгоритма минимизации.</summary>
117 /// <summary>Формирует множества конечных состояний перед началом работы алгоритма минимизации.</summary>
104 /// <remarks>
118 /// <remarks>
105 /// В процессе построения минимального автомата требуется разделить множество состояний,
119 /// В процессе построения минимального автомата требуется разделить множество состояний,
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@@ -71,8 +71,16 namespace Implab.Automaton {
71 return true;
71 return true;
72 }
72 }
73
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 }
79
74 public abstract int GetSymbolIndex(T symbol);
80 public abstract int GetSymbolIndex(T symbol);
75
81
82 public abstract T GetSymbolByIndex(int index);
83
76 public abstract IEnumerable<T> InputSymbols { get; }
84 public abstract IEnumerable<T> InputSymbols { get; }
77
85
78 /// <summary>
86 /// <summary>
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@@ -38,7 +38,6 namespace Implab.Automaton {
38 Safe.ArgumentNotNull(symbols, "symbols");
38 Safe.ArgumentNotNull(symbols, "symbols");
39
39
40 m_nextCls = Math.Max(cls + 1, m_nextCls);
40 m_nextCls = Math.Max(cls + 1, m_nextCls);
41 symbols = symbols.Distinct();
42
41
43 foreach (var symbol in symbols)
42 foreach (var symbol in symbols)
44 m_map[symbol] = cls;
43 m_map[symbol] = cls;
@@ -68,6 +67,10 namespace Implab.Automaton {
68 return m_supportUnclassified || m_map.ContainsKey(symbol);
67 return m_supportUnclassified || m_map.ContainsKey(symbol);
69 }
68 }
70
69
70
71 public IEnumerable<T> GetSymbols(int cls) {
72 return m_map.Where(p => p.Value == cls).Select(p => p.Key);
73 }
71 #endregion
74 #endregion
72 }
75 }
73 }
76 }
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@@ -1,14 +1,14
1 using System;
1 using System;
2
2
3 namespace Implab.Automaton.RegularExpressions {
3 namespace Implab.Automaton.RegularExpressions {
4 public struct DFAStateDescriptorT<T> {
4 public struct DFAStateDescriptor<T> {
5 public readonly bool final;
5 public readonly bool final;
6
6
7 public readonly int[] transitions;
7 public readonly int[] transitions;
8
8
9 public readonly T[] tags;
9 public readonly T[] tags;
10
10
11 public DFAStateDescriptorT(int size, bool final, T[] tags) {
11 public DFAStateDescriptor(int size, bool final, T[] tags) {
12 Safe.ArgumentAssert(size >= 0, "size");
12 Safe.ArgumentAssert(size >= 0, "size");
13 this.final = final;
13 this.final = final;
14 this.tags = tags;
14 this.tags = tags;
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@@ -66,23 +66,21 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 void BuildDFA(Token<TTag> lang, IDFATableBuilder<TTag> dfaTable, IAlphabetBuilder<TSymbol> dfaAlphabet) {
69 protected abstract IAlphabetBuilder<TSymbol> CreateAlphabet();
70 Safe.ArgumentNotNull(lang, "lang");
71 Safe.ArgumentNotNull(dfaAlphabet, "dfaAlphabet");
72
73 var dfa = new RegularDFADefinition<TSymbol, TTag>(AlphabetBuilder);
74
70
75 var builder = new RegularDFABuilder<TTag>();
71 protected RegularDFA<TSymbol, TTag> BuildDFA(Token<TTag> regexp) {
72
73 var dfa = new RegularDFA<TSymbol, TTag>(AlphabetBuilder);
76
74
77 lang.Accept( builder );
75 var visitor = new RegularExpressionVisitor<TTag>();
76 regexp.Accept( visitor );
78
77
79 builder.BuildDFA(dfa);
78 visitor.BuildDFA(dfa);
80
79
81 if (dfa.IsFinalState(dfa.InitialState))
80 if (dfa.IsFinalState(dfa.InitialState))
82 throw new ApplicationException("The specified language contains empty token");
81 throw new ApplicationException("The specified language contains empty token");
83
82
84 dfa.Optimize(dfaTable, dfaAlphabet);
83 return dfa.Optimize(CreateAlphabet());
85
86 }
84 }
87
85
88 }
86 }
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@@ -3,6 +3,7 using System;
3 using System.Collections.Generic;
3 using System.Collections.Generic;
4 using System.IO;
4 using System.IO;
5 using Implab.Components;
5 using Implab.Components;
6 using Implab.Automaton.RegularExpressions;
6
7
7 namespace Implab.Automaton {
8 namespace Implab.Automaton {
8 /// <summary>
9 /// <summary>
@@ -14,19 +15,23 namespace Implab.Automaton {
14 /// конца токена и допустимости текущего символа.
15 /// конца токена и допустимости текущего символа.
15 /// </remarks>
16 /// </remarks>
16 public abstract class Scanner<TTag> : Disposable {
17 public abstract class Scanner<TTag> : Disposable {
17 struct ScannerConfig {
18 protected struct ScannerConfig {
18 public DFAStateDescriptior<TTag>[] states;
19 public readonly DFAStateDescriptor<TTag>[] states;
19 public int[] alphabetMap;
20 public readonly int[] alphabet;
20 public int initialState;
21 public readonly int initialState;
22
23 public ScannerConfig(DFAStateDescriptor<TTag>[] states, int[] alphabet, int initialState) {
24 this.initialState = initialState;
25 this.alphabet = alphabet;
26 this.states = states;
27 }
21 }
28 }
22
29
23 Stack<ScannerConfig> m_defs = new Stack<ScannerConfig>();
30 Stack<ScannerConfig> m_defs = new Stack<ScannerConfig>();
24
31
25 DFAStateDescriptior<TTag>[] m_states;
32 ScannerConfig m_config;
26 int[] m_alphabetMap;
27 int m_initialState;
28
33
29 protected DFAStateDescriptior<TTag> m_currentState;
34 protected DFAStateDescriptor<TTag> m_currentState;
30 int m_previewCode;
35 int m_previewCode;
31
36
32 protected int m_tokenLen;
37 protected int m_tokenLen;
@@ -41,15 +46,11 namespace Implab.Automaton {
41 int m_chunkSize = 1024; // 1k
46 int m_chunkSize = 1024; // 1k
42 int m_limit = 10 * 1024 * 1024; // 10Mb
47 int m_limit = 10 * 1024 * 1024; // 10Mb
43
48
44 protected Scanner(DFAStateDescriptior<TTag>[] states, int[] alphabet, int initialState) {
49 protected Scanner(ScannerConfig config) {
45 Safe.ArgumentNotEmpty(states, "states");
50 Safe.ArgumentNotEmpty(config.states, "config.states");
46 Safe.ArgumentNotNull(alphabet, "alphabet");
51 Safe.ArgumentNotNull(config.alphabet, "config.alphabet");
47
52
48 m_states = states;
53 m_config = config;
49 m_alphabetMap = alphabet;
50 m_initialState = initialState;
51
52 Feed(new char[0]);
53 }
54 }
54
55
55 /// <summary>
56 /// <summary>
@@ -110,7 +111,7 namespace Implab.Automaton {
110 /// </summary>
111 /// </summary>
111 protected TTag[] TokenTags {
112 protected TTag[] TokenTags {
112 get {
113 get {
113 return m_currentState.tag;
114 return m_currentState.tags;
114 }
115 }
115 }
116 }
116
117
@@ -133,7 +134,7 namespace Implab.Automaton {
133 if (m_pointer >= m_bufferSize)
134 if (m_pointer >= m_bufferSize)
134 return false;
135 return false;
135
136
136 m_currentState = m_states[m_initialState];
137 m_currentState = m_config.states[m_config.initialState];
137 m_tokenLen = 0;
138 m_tokenLen = 0;
138 m_tokenOffset = m_pointer;
139 m_tokenOffset = m_pointer;
139 int nextState;
140 int nextState;
@@ -151,7 +152,7 namespace Implab.Automaton {
151 )
152 )
152 );
153 );
153 }
154 }
154 m_currentState = m_states[nextState];
155 m_currentState = m_config.states[nextState];
155 m_tokenLen++;
156 m_tokenLen++;
156
157
157 } while (Shift());
158 } while (Shift());
@@ -172,7 +173,7 namespace Implab.Automaton {
172 return false;
173 return false;
173 }
174 }
174
175
175 m_previewCode = m_alphabetMap[m_buffer[m_pointer]];
176 m_previewCode = m_config.alphabet[m_buffer[m_pointer]];
176
177
177 return true;
178 return true;
178 }
179 }
@@ -217,23 +218,14 namespace Implab.Automaton {
217 /// Преключает внутренний ДКА на указанный, позволяет реализовать подобие захватывающей
218 /// Преключает внутренний ДКА на указанный, позволяет реализовать подобие захватывающей
218 /// группировки.
219 /// группировки.
219 /// </summary>
220 /// </summary>
220 /// <param name="states">Таблица состояний нового ДКА</param>
221 /// <param name = "config"></param>
221 /// <param name="alphabet">Таблица входных символов для нового ДКА</param>
222 protected void Switch(ScannerConfig config) {
222 /// <param name = "initialState"></param>
223 Safe.ArgumentNotNull(config.states, "config.states");
223 protected void Switch(DFAStateDescriptior<TTag>[] states, int[] alphabet, int initialState) {
224 Safe.ArgumentNotNull(states, "dfa");
225
224
226 m_defs.Push(new ScannerConfig {
225 m_defs.Push(m_config);
227 states = m_states,
226 m_config = config;
228 alphabetMap = m_alphabetMap,
229 initialState = m_initialState
230 });
231
227
232 m_states = states;
228 m_previewCode = m_config.alphabet[m_buffer[m_pointer]];
233 m_alphabetMap = alphabet;
234 m_initialState = initialState;
235
236 m_previewCode = m_alphabetMap[m_buffer[m_pointer]];
237 }
229 }
238
230
239 /// <summary>
231 /// <summary>
@@ -242,11 +234,9 namespace Implab.Automaton {
242 protected void Restore() {
234 protected void Restore() {
243 if (m_defs.Count == 0)
235 if (m_defs.Count == 0)
244 throw new InvalidOperationException();
236 throw new InvalidOperationException();
245 var prev = m_defs.Pop();
237 m_config = m_defs.Pop();
246 m_states = prev.states;
238
247 m_alphabetMap = prev.alphabetMap;
239 m_previewCode = m_config.alphabet[m_buffer[m_pointer]];
248 m_initialState = prev.initialState;
249 m_previewCode = m_alphabetMap[m_buffer[m_pointer]];
250 }
240 }
251
241
252 protected override void Dispose(bool disposing) {
242 protected override void Dispose(bool disposing) {
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@@ -13,6 +13,10 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
16 public IEnumerable<byte> InputSymbols {
20 public IEnumerable<byte> InputSymbols {
17 get {
21 get {
18 return Enumerable.Range(byte.MinValue, byte.MaxValue).Cast<byte>();
22 return Enumerable.Range(byte.MinValue, byte.MaxValue).Cast<byte>();
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@@ -13,6 +13,10 namespace Implab.Formats {
13 return symbol;
13 return symbol;
14 }
14 }
15
15
16 public override char GetSymbolByIndex(int index) {
17 return (char)index;
18 }
19
16 public override IEnumerable<char> InputSymbols {
20 public override IEnumerable<char> InputSymbols {
17 get { return Enumerable.Range(char.MinValue, char.MaxValue).Cast<char>(); }
21 get { return Enumerable.Range(char.MinValue, char.MaxValue).Cast<char>(); }
18 }
22 }
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@@ -1,6 +1,7
1 using System.Linq;
1 using System.Linq;
2 using Implab.Automaton.RegularExpressions;
2 using Implab.Automaton.RegularExpressions;
3 using System;
3 using System;
4 using Implab.Automaton;
4
5
5 namespace Implab.Formats.JSON {
6 namespace Implab.Formats.JSON {
6 class JSONGrammar : Grammar<char,JSONGrammar.TokenType> {
7 class JSONGrammar : Grammar<char,JSONGrammar.TokenType> {
@@ -35,8 +36,8 namespace Implab.Formats.JSON {
35 get { return _instance.Value; }
36 get { return _instance.Value; }
36 }
37 }
37
38
38 readonly RegularCharDFADefinition<TokenType> m_jsonDFA;
39 readonly RegularDFA<char, TokenType> m_jsonDFA;
39 readonly RegularCharDFADefinition<TokenType> m_stringDFA;
40 readonly RegularDFA<char, TokenType> m_stringDFA;
40
41
41 public JSONGrammar() {
42 public JSONGrammar() {
42 DefineAlphabet(Enumerable.Range(0, 0x20).Select(x => (char)x));
43 DefineAlphabet(Enumerable.Range(0, 0x20).Select(x => (char)x));
@@ -87,21 +88,17 namespace Implab.Formats.JSON {
87 .Or(unescaped.Closure().Tag(TokenType.UnescapedChar));
88 .Or(unescaped.Closure().Tag(TokenType.UnescapedChar));
88
89
89
90
90 m_jsonDFA = new RegularCharDFADefinition<TokenType>(new CharAlphabet());
91 m_jsonDFA = BuildDFA(jsonExpression);
91 BuildDFA(jsonExpression, m_jsonDFA, m_jsonDFA.InputAlphabet);
92 m_stringDFA = BuildDFA(jsonStringExpression);
92
93
94 m_stringDFA = new RegularCharDFADefinition<TokenType>(new CharAlphabet());
95 BuildDFA(jsonStringExpression, m_jsonDFA, m_jsonDFA.InputAlphabet);
96 }
93 }
97
94
98 public RegularCharDFADefinition<TokenType> JsonDFA {
95 public RegularDFA<char, TokenType> JsonDFA {
99 get {
96 get {
100 return m_jsonDFA;
97 return m_jsonDFA;
101 }
98 }
102 }
99 }
103
100
104 public RegularDFADefinition<char,TokenType> JsonStringDFA {
101 public RegularDFA<char,TokenType> JsonStringDFA {
105 get {
102 get {
106 return m_stringDFA;
103 return m_stringDFA;
107 }
104 }
@@ -110,6 +107,10 namespace Implab.Formats.JSON {
110 Token<TokenType> SymbolRangeToken(char start, char stop) {
107 Token<TokenType> SymbolRangeToken(char start, char stop) {
111 return SymbolToken(Enumerable.Range(start,stop - start).Cast<char>());
108 return SymbolToken(Enumerable.Range(start,stop - start).Cast<char>());
112 }
109 }
110
111 protected override IAlphabetBuilder<char> CreateAlphabet() {
112 return new CharAlphabet();
113 }
113
114
114 }
115 }
115 }
116 }
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@@ -86,9 +86,9 namespace Implab.Formats.JSON {
86 return Token<object>.New(input.Select(t => _alphabet.Translate(t)).ToArray());
86 return Token<object>.New(input.Select(t => _alphabet.Translate(t)).ToArray());
87 }
87 }
88
88
89 static RegularDFADefinition<JsonTokenType,object> CreateDFA(Token<object> expr) {
89 static RegularDFA<JsonTokenType,object> CreateDFA(Token<object> expr) {
90 var builder = new RegularDFABuilder<object>();
90 var builder = new RegularExpressionVisitor<object>();
91 var dfa = new RegularDFADefinition<JsonTokenType,object>(_alphabet);
91 var dfa = new RegularDFA<JsonTokenType,object>(_alphabet);
92
92
93 expr.Accept(builder);
93 expr.Accept(builder);
94
94
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@@ -170,7 +170,6
170 <Compile Include="Automaton\RegularExpressions\Token.cs" />
170 <Compile Include="Automaton\RegularExpressions\Token.cs" />
171 <Compile Include="Automaton\RegularExpressions\IVisitor.cs" />
171 <Compile Include="Automaton\RegularExpressions\IVisitor.cs" />
172 <Compile Include="Automaton\AutomatonTransition.cs" />
172 <Compile Include="Automaton\AutomatonTransition.cs" />
173 <Compile Include="Automaton\RegularExpressions\RegularDFABuilder.cs" />
174 <Compile Include="Formats\JSON\JSONElementContext.cs" />
173 <Compile Include="Formats\JSON\JSONElementContext.cs" />
175 <Compile Include="Formats\JSON\JSONElementType.cs" />
174 <Compile Include="Formats\JSON\JSONElementType.cs" />
176 <Compile Include="Formats\JSON\JSONGrammar.cs" />
175 <Compile Include="Formats\JSON\JSONGrammar.cs" />
@@ -183,13 +182,14
183 <Compile Include="Formats\JSON\StringTranslator.cs" />
182 <Compile Include="Formats\JSON\StringTranslator.cs" />
184 <Compile Include="Automaton\MapAlphabet.cs" />
183 <Compile Include="Automaton\MapAlphabet.cs" />
185 <Compile Include="Automaton\DummyAlphabet.cs" />
184 <Compile Include="Automaton\DummyAlphabet.cs" />
186 <Compile Include="Automaton\RegularExpressions\RegularDFADefinition.cs" />
187 <Compile Include="Formats\CharAlphabet.cs" />
185 <Compile Include="Formats\CharAlphabet.cs" />
188 <Compile Include="Formats\ByteAlphabet.cs" />
186 <Compile Include="Formats\ByteAlphabet.cs" />
189 <Compile Include="Formats\RegularCharDFADefinition.cs" />
190 <Compile Include="Automaton\IDFATable.cs" />
187 <Compile Include="Automaton\IDFATable.cs" />
191 <Compile Include="Automaton\IDFATableBuilder.cs" />
188 <Compile Include="Automaton\IDFATableBuilder.cs" />
192 <Compile Include="Automaton\DFATable.cs" />
189 <Compile Include="Automaton\DFATable.cs" />
190 <Compile Include="Automaton\RegularExpressions\RegularDFA.cs" />
191 <Compile Include="Automaton\RegularExpressions\RegularExpressionVisitor.cs" />
192 <Compile Include="Automaton\RegularExpressions\ITaggedDFABuilder.cs" />
193 <Compile Include="Automaton\RegularExpressions\DFAStateDescriptorT.cs" />
193 <Compile Include="Automaton\RegularExpressions\DFAStateDescriptorT.cs" />
194 </ItemGroup>
194 </ItemGroup>
195 <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
195 <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
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