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1 | using Implab; | |
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2 | using System; | |
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3 | using System.Collections.Generic; | |
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4 | using System.IO; | |
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5 | using Implab.Components; | |
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6 | using Implab.Automaton.RegularExpressions; | |
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7 | ||
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8 | namespace Implab.Automaton { | |
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9 | /// <summary> | |
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10 | /// ΠΠ°Π·ΠΎΠ²ΡΠΉ ΠΊΠ»Π°ΡΡ Π΄Π»Ρ ΡΠ°Π·Π±ΠΎΡΠ° ΠΏΠΎΡΠΎΠΊΠ° Π²Ρ ΠΎΠ΄Π½ΡΡ ΡΠΈΠΌΠ²ΠΎΠ»ΠΎΠ² Π½Π° ΡΠΎΠΊΠ΅Π½Ρ. | |
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11 | /// </summary> | |
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12 | /// <remarks> | |
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13 | /// Π‘ΠΊΠ°Π½Π½Π΅Ρ ΠΈΠΌΠ΅Π΅Ρ Π²Π½ΡΡΡΠΈ Π±ΡΡΡΠ΅Ρ Ρ ΡΠΈΠΌΠΎΠ»Π°ΠΌΠΈ Π²Ρ ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΠ΅ΠΊΡΡΠ°, ΠΏΠΎ ΠΊΠΎΡΠΎΡΠΎΠΌΡ ΠΏΠ΅ΡΠ΅ΠΌΠ΅ΡΠ°ΡΡΡΡ Π΄Π²Π° | |
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14 | /// ΡΠΊΠ°Π·Π°ΡΠ΅Π»Ρ, Π½Π°ΡΠ°Π»Π° ΠΈ ΠΊΠΎΠ½ΡΠ° ΡΠΎΠΊΠ΅Π½Π°, ΠΏΡΠΈ ΠΏΠ΅ΡΠ΅ΠΌΠ΅ΡΠ΅Π½ΠΈΠΈ ΠΈΡΠΊΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΠΠΠ Π΄Π»Ρ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ | |
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15 | /// ΠΊΠΎΠ½ΡΠ° ΡΠΎΠΊΠ΅Π½Π° ΠΈ Π΄ΠΎΠΏΡΡΡΠΈΠΌΠΎΡΡΠΈ ΡΠ΅ΠΊΡΡΠ΅Π³ΠΎ ΡΠΈΠΌΠ²ΠΎΠ»Π°. | |
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16 | /// </remarks> | |
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17 | public abstract class Scanner<TTag> : Disposable { | |
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18 | protected struct ScannerConfig { | |
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19 | public readonly DFAStateDescriptor<TTag>[] states; | |
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20 | public readonly int[] alphabet; | |
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21 | public readonly int initialState; | |
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22 | ||
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23 | public ScannerConfig(DFAStateDescriptor<TTag>[] states, int[] alphabet, int initialState) { | |
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24 | this.initialState = initialState; | |
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25 | this.alphabet = alphabet; | |
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26 | this.states = states; | |
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27 | } | |
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28 | } | |
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29 | ||
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30 | Stack<ScannerConfig> m_defs = new Stack<ScannerConfig>(); | |
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31 | ||
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32 | ScannerConfig m_config; | |
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33 | ||
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34 | protected DFAStateDescriptor<TTag> m_currentState; | |
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35 | int m_previewCode; | |
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36 | ||
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37 | protected int m_tokenLen; | |
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38 | protected int m_tokenOffset; | |
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39 | ||
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40 | protected char[] m_buffer; | |
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41 | protected int m_bufferSize; | |
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42 | protected int m_pointer; | |
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43 | ||
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44 | TextReader m_reader; | |
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45 | bool m_disposeReader; | |
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46 | int m_chunkSize = 1024; // 1k | |
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47 | int m_limit = 10 * 1024 * 1024; // 10Mb | |
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48 | ||
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49 | protected Scanner(ScannerConfig config) { | |
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50 | Safe.ArgumentNotEmpty(config.states, "config.states"); | |
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51 | Safe.ArgumentNotNull(config.alphabet, "config.alphabet"); | |
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52 | ||
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53 | m_config = config; | |
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54 | } | |
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55 | ||
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56 | /// <summary> | |
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57 | /// ΠΠ°ΠΏΠΎΠ»Π½ΡΠ΅Ρ Π²Ρ ΠΎΠ΄Π½ΡΠΌΠΈ Π΄Π°Π½Π½ΡΠΌΠΈ Π±ΡΡΡΠ΅Ρ. | |
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58 | /// </summary> | |
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59 | /// <param name="data">ΠΠ°Π½Π½ΡΠ΅ Π΄Π»Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ.</param> | |
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60 | /// <remarks>ΠΠΎΠΏΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π΄Π°Π½Π½ΡΡ Π½Π΅ ΠΏΡΠΎΠΈΡΡ ΠΎΠ΄ΠΈΡ, ΠΏΠ΅ΡΠ΅Π΄Π°Π½Π½ΡΠΉ ΠΌΠ°ΡΡΠΈΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ Π² | |
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61 | /// ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π²Ρ ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π±ΡΡΡΠ΅ΡΠ°.</remarks> | |
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62 | public void Feed(char[] data) { | |
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63 | Safe.ArgumentNotNull(data, "data"); | |
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64 | ||
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65 | Feed(data, data.Length); | |
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66 | } | |
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67 | ||
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68 | /// <summary> | |
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69 | /// ΠΠ°ΠΏΠΎΠ»Π½ΡΠ΅Ρ Π±ΡΡΡΡΡ ΡΡΠ΅Π½ΠΈΡ Π²Ρ ΠΎΠ΄Π½ΡΠΌΠΈ Π΄Π°Π½Π½ΡΠΌΠΈ. | |
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70 | /// </summary> | |
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71 | /// <param name="data">ΠΠ°Π½Π½ΡΠ΅ Π΄Π»Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ.</param> | |
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72 | /// <param name="length">ΠΠ»ΠΈΠ½Π° Π΄Π°Π½Π½ΡΡ Π΄Π»Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ.</param> | |
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73 | /// <remarks>ΠΠΎΠΏΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π΄Π°Π½Π½ΡΡ Π½Π΅ ΠΏΡΠΎΠΈΡΡ ΠΎΠ΄ΠΈΡ, ΠΏΠ΅ΡΠ΅Π΄Π°Π½Π½ΡΠΉ ΠΌΠ°ΡΡΠΈΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ Π² | |
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74 | /// ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π²Ρ ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π±ΡΡΡΠ΅ΡΠ°.</remarks> | |
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75 | public void Feed(char[] data, int length) { | |
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76 | Safe.ArgumentNotNull(data, "data"); | |
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77 | Safe.ArgumentInRange(length, 0, data.Length, "length"); | |
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78 | AssertNotDisposed(); | |
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79 | ||
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80 | m_pointer = -1; | |
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81 | m_buffer = data; | |
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82 | m_bufferSize = length; | |
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83 | Shift(); | |
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84 | } | |
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85 | ||
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86 | public void Feed(TextReader reader, bool dispose) { | |
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87 | Safe.ArgumentNotNull(reader, "reader"); | |
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88 | AssertNotDisposed(); | |
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89 | ||
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90 | if (m_reader != null && m_disposeReader) | |
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91 | m_reader.Dispose(); | |
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92 | ||
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93 | m_reader = reader; | |
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94 | m_disposeReader = dispose; | |
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95 | m_pointer = -1; | |
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96 | m_buffer = new char[m_chunkSize]; | |
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97 | m_bufferSize = 0; | |
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98 | Shift(); | |
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99 | } | |
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100 | ||
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101 | /// <summary> | |
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102 | /// ΠΠΎΠ»ΡΡΠ°Π΅Ρ ΡΠ΅ΠΊΡΡΠΈΠΉ ΡΠΎΠΊΠ΅Π½ Π² Π²ΠΈΠ΄Π΅ ΡΡΡΠΎΠΊΠΈ. | |
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103 | /// </summary> | |
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104 | /// <returns></returns> | |
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105 | protected string GetTokenValue() { | |
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106 | return new String(m_buffer, m_tokenOffset, m_tokenLen); | |
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107 | } | |
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108 | ||
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109 | /// <summary> | |
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110 | /// ΠΠ΅ΡΠΊΠΈ ΡΠ΅ΠΊΡΡΠ΅Π³ΠΎ ΡΠΎΠΊΠ΅Π½Π°, ΠΊΠΎΡΠΎΡΡΠ΅ Π±ΡΠ»ΠΈ Π½Π°Π·Π½Π°ΡΠ΅Π½Ρ Π² ΡΠ΅Π³ΡΠ»ΡΡΠ½ΠΎΠΌ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΠΈ. | |
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111 | /// </summary> | |
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112 | protected TTag[] TokenTags { | |
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113 | get { | |
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114 | return m_currentState.tags; | |
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115 | } | |
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116 | } | |
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117 | ||
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118 | /// <summary> | |
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119 | /// ΠΡΠΈΠ·Π½Π°ΠΊ ΠΊΠΎΠ½ΡΠ° Π΄Π°Π½Π½ΡΡ | |
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120 | /// </summary> | |
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121 | public bool EOF { | |
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122 | get { | |
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123 | return m_pointer >= m_bufferSize; | |
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124 | } | |
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125 | } | |
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126 | ||
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127 | /// <summary> | |
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128 | /// Π§ΠΈΡΠ°Π΅Ρ ΡΠ»Π΅Π΄ΡΡΡΠΈΠΉ ΡΠΎΠΊΠ΅Π½, ΠΏΡΠΈ ΡΡΠΎΠΌ <see cref="m_tokenOffset"/> ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° Π½Π°ΡΠ°Π»ΠΎ ΡΠΎΠΊΠ΅Π½Π°, | |
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129 | /// <see cref="m_tokenLen"/> Π½Π° Π΄Π»ΠΈΠ½Ρ ΡΠΎΠΊΠ΅Π½Π°, <see cref="m_buffer"/> - ΠΌΠ°ΡΡΠΈΠ² ΡΠΈΠΌΠ²ΠΎΠ»ΠΎΠ², Π² | |
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130 | /// ΠΊΠΎΡΠΎΡΠΎΠΌ Π½Π°Ρ ΠΎΠ΄ΠΈΡΡΡ ΡΠΎΠΊΠ΅Π½. | |
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131 | /// </summary> | |
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132 | /// <returns><c>false</c> - Π΄ΠΎΡΡΠΈΠ³Π½ΡΡ ΠΊΠΎΠ½Π΅Ρ Π΄Π°Π½Π½ΡΡ , ΡΠΎΠΊΠ΅Π½ Π½Π΅ ΠΏΡΠΎΡΠΈΡΠ°Π½.</returns> | |
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133 | protected bool ReadTokenInternal() { | |
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134 | if (m_pointer >= m_bufferSize) | |
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135 | return false; | |
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136 | ||
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137 | m_currentState = m_config.states[m_config.initialState]; | |
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138 | m_tokenLen = 0; | |
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139 | m_tokenOffset = m_pointer; | |
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140 | int nextState; | |
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141 | do { | |
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142 | nextState = m_currentState.transitions[m_previewCode]; | |
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143 | if (nextState == DFAConst.UNREACHABLE_STATE) { | |
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144 | if (m_currentState.final) | |
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145 | return true; | |
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146 | ||
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147 | throw new ParserException( | |
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148 | String.Format( | |
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149 | "Unexpected symbol '{0}', at pos {1}", | |
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150 | m_buffer[m_pointer], | |
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151 | Position | |
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152 | ) | |
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153 | ); | |
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154 | } | |
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155 | m_currentState = m_config.states[nextState]; | |
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156 | m_tokenLen++; | |
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157 | ||
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158 | } while (Shift()); | |
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159 | ||
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160 | // END OF DATA | |
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161 | if (!m_currentState.final) | |
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162 | throw new ParserException("Unexpected end of data"); | |
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163 | ||
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164 | return true; | |
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165 | } | |
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166 | ||
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167 | ||
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168 | bool Shift() { | |
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169 | m_pointer++; | |
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170 | ||
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171 | if (m_pointer >= m_bufferSize) { | |
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172 | if (!ReadNextChunk()) | |
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173 | return false; | |
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174 | } | |
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175 | ||
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176 | m_previewCode = m_config.alphabet[m_buffer[m_pointer]]; | |
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177 | ||
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178 | return true; | |
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179 | } | |
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180 | ||
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181 | bool ReadNextChunk() { | |
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182 | if (m_reader == null) | |
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183 | return false; | |
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184 | ||
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185 | // extend buffer if nesessary | |
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186 | if (m_pointer + m_chunkSize > m_buffer.Length) { | |
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187 | // trim unused buffer head | |
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188 | var size = m_tokenLen + m_chunkSize; | |
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189 | if (size >= m_limit) | |
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190 | throw new ParserException(String.Format("Input buffer {0} bytes limit exceeded", m_limit)); | |
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191 | var temp = new char[size]; | |
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192 | Array.Copy(m_buffer, m_tokenOffset, temp, 0, m_tokenLen); | |
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193 | m_pointer -= m_tokenOffset; | |
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194 | m_bufferSize -= m_tokenOffset; | |
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195 | m_tokenOffset = 0; | |
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196 | m_buffer = temp; | |
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197 | } | |
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198 | ||
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199 | var read = m_reader.Read(m_buffer, m_tokenLen, m_chunkSize); | |
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200 | if (read == 0) | |
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201 | return false; | |
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202 | ||
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203 | m_bufferSize += read; | |
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204 | ||
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205 | return true; | |
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206 | } | |
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207 | ||
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208 | /// <summary> | |
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209 | /// ΠΠΎΠ·ΠΈΡΠΈΡ ΡΠΊΠ°Π½Π½Π΅ΡΠ° Π²ΠΎ Π²Ρ ΠΎΠ΄Π½ΠΎΠΌ Π±ΡΡΠ΅ΡΠ΅ | |
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210 | /// </summary> | |
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211 | public int Position { | |
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212 | get { | |
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213 | return m_pointer + 1; | |
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214 | } | |
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215 | } | |
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216 | ||
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217 | /// <summary> | |
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218 | /// ΠΡΠ΅ΠΊΠ»ΡΡΠ°Π΅Ρ Π²Π½ΡΡΡΠ΅Π½Π½ΠΈΠΉ ΠΠΠ Π½Π° ΡΠΊΠ°Π·Π°Π½Π½ΡΠΉ, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²Π°ΡΡ ΠΏΠΎΠ΄ΠΎΠ±ΠΈΠ΅ Π·Π°Ρ Π²Π°ΡΡΠ²Π°ΡΡΠ΅ΠΉ | |
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219 | /// Π³ΡΡΠΏΠΏΠΈΡΠΎΠ²ΠΊΠΈ. | |
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220 | /// </summary> | |
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221 | /// <param name = "config"></param> | |
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222 | protected void Switch(ScannerConfig config) { | |
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223 | Safe.ArgumentNotNull(config.states, "config.states"); | |
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224 | ||
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225 | m_defs.Push(m_config); | |
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226 | m_config = config; | |
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227 | ||
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228 | m_previewCode = m_config.alphabet[m_buffer[m_pointer]]; | |
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229 | } | |
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230 | ||
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231 | /// <summary> | |
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232 | /// ΠΠΎΡΡΡΠ°Π½Π°Π²Π»ΠΈΠ²Π°Π΅Ρ ΠΏΡΠ΅Π΄ΡΠ΄ΡΡΠ΅ΠΉ ΠΠΠ ΡΠΊΠ°Π½Π½Π΅ΡΠ°. | |
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233 | /// </summary> | |
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234 | protected void Restore() { | |
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235 | if (m_defs.Count == 0) | |
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236 | throw new InvalidOperationException(); | |
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237 | m_config = m_defs.Pop(); | |
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238 | ||
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239 | m_previewCode = m_config.alphabet[m_buffer[m_pointer]]; | |
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240 | } | |
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241 | ||
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242 | protected override void Dispose(bool disposing) { | |
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243 | if (disposing) { | |
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244 | if (m_reader != null && m_disposeReader) | |
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245 | m_reader.Dispose(); | |
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246 | m_buffer = null; | |
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247 | m_bufferSize = 0; | |
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248 | m_pointer = 0; | |
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249 | m_tokenLen = 0; | |
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250 | m_tokenOffset = 0; | |
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251 | } | |
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252 | base.Dispose(disposing); | |
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253 | } | |
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254 | } | |
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255 | } | |
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1 | using Implab; | |
|
2 | using System; | |
|
3 | using System.Collections.Generic; | |
|
4 | using System.IO; | |
|
5 | using Implab.Components; | |
|
6 | using Implab.Automaton.RegularExpressions; | |
|
7 | ||
|
8 | namespace Implab.Automaton { | |
|
9 | /// <summary> | |
|
10 | /// ΠΠ°Π·ΠΎΠ²ΡΠΉ ΠΊΠ»Π°ΡΡ Π΄Π»Ρ ΡΠ°Π·Π±ΠΎΡΠ° ΠΏΠΎΡΠΎΠΊΠ° Π²Ρ ΠΎΠ΄Π½ΡΡ ΡΠΈΠΌΠ²ΠΎΠ»ΠΎΠ² Π½Π° ΡΠΎΠΊΠ΅Π½Ρ. | |
|
11 | /// </summary> | |
|
12 | /// <remarks> | |
|
13 | /// Π‘ΠΊΠ°Π½Π½Π΅Ρ ΠΈΠΌΠ΅Π΅Ρ Π²Π½ΡΡΡΠΈ Π±ΡΡΡΠ΅Ρ Ρ ΡΠΈΠΌΠΎΠ»Π°ΠΌΠΈ Π²Ρ ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΠ΅ΠΊΡΡΠ°, ΠΏΠΎ ΠΊΠΎΡΠΎΡΠΎΠΌΡ ΠΏΠ΅ΡΠ΅ΠΌΠ΅ΡΠ°ΡΡΡΡ Π΄Π²Π° | |
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14 | /// ΡΠΊΠ°Π·Π°ΡΠ΅Π»Ρ, Π½Π°ΡΠ°Π»Π° ΠΈ ΠΊΠΎΠ½ΡΠ° ΡΠΎΠΊΠ΅Π½Π°, ΠΏΡΠΈ ΠΏΠ΅ΡΠ΅ΠΌΠ΅ΡΠ΅Π½ΠΈΠΈ ΠΈΡΠΊΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΠΠΠ Π΄Π»Ρ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ | |
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15 | /// ΠΊΠΎΠ½ΡΠ° ΡΠΎΠΊΠ΅Π½Π° ΠΈ Π΄ΠΎΠΏΡΡΡΠΈΠΌΠΎΡΡΠΈ ΡΠ΅ΠΊΡΡΠ΅Π³ΠΎ ΡΠΈΠΌΠ²ΠΎΠ»Π°. | |
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16 | /// </remarks> | |
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17 | public abstract class Scanner<TTag> : Disposable { | |
|
18 | protected struct ScannerConfig { | |
|
19 | public readonly DFAStateDescriptor<TTag>[] states; | |
|
20 | public readonly int[] alphabet; | |
|
21 | public readonly int initialState; | |
|
22 | ||
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23 | public ScannerConfig(DFAStateDescriptor<TTag>[] states, int[] alphabet, int initialState) { | |
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24 | this.initialState = initialState; | |
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25 | this.alphabet = alphabet; | |
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26 | this.states = states; | |
|
27 | } | |
|
28 | } | |
|
29 | ||
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30 | Stack<ScannerConfig> m_defs = new Stack<ScannerConfig>(); | |
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31 | ||
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32 | ScannerConfig m_config; | |
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33 | ||
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34 | protected DFAStateDescriptor<TTag> m_currentState; | |
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35 | int m_previewCode; | |
|
36 | ||
|
37 | protected int m_tokenLen; | |
|
38 | protected int m_tokenOffset; | |
|
39 | ||
|
40 | protected char[] m_buffer; | |
|
41 | protected int m_bufferSize; | |
|
42 | protected int m_pointer; | |
|
43 | ||
|
44 | TextReader m_reader; | |
|
45 | bool m_disposeReader; | |
|
46 | int m_chunkSize = 1024; // 1k | |
|
47 | int m_limit = 10 * 1024 * 1024; // 10Mb | |
|
48 | ||
|
49 | protected Scanner(ScannerConfig config) { | |
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50 | Safe.ArgumentNotEmpty(config.states, "config.states"); | |
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51 | Safe.ArgumentNotNull(config.alphabet, "config.alphabet"); | |
|
52 | ||
|
53 | m_config = config; | |
|
54 | } | |
|
55 | ||
|
56 | /// <summary> | |
|
57 | /// ΠΠ°ΠΏΠΎΠ»Π½ΡΠ΅Ρ Π²Ρ ΠΎΠ΄Π½ΡΠΌΠΈ Π΄Π°Π½Π½ΡΠΌΠΈ Π±ΡΡΡΠ΅Ρ. | |
|
58 | /// </summary> | |
|
59 | /// <param name="data">ΠΠ°Π½Π½ΡΠ΅ Π΄Π»Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ.</param> | |
|
60 | /// <remarks>ΠΠΎΠΏΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π΄Π°Π½Π½ΡΡ Π½Π΅ ΠΏΡΠΎΠΈΡΡ ΠΎΠ΄ΠΈΡ, ΠΏΠ΅ΡΠ΅Π΄Π°Π½Π½ΡΠΉ ΠΌΠ°ΡΡΠΈΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ Π² | |
|
61 | /// ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π²Ρ ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π±ΡΡΡΠ΅ΡΠ°.</remarks> | |
|
62 | public void Feed(char[] data) { | |
|
63 | Safe.ArgumentNotNull(data, "data"); | |
|
64 | ||
|
65 | Feed(data, data.Length); | |
|
66 | } | |
|
67 | ||
|
68 | /// <summary> | |
|
69 | /// ΠΠ°ΠΏΠΎΠ»Π½ΡΠ΅Ρ Π±ΡΡΡΡΡ ΡΡΠ΅Π½ΠΈΡ Π²Ρ ΠΎΠ΄Π½ΡΠΌΠΈ Π΄Π°Π½Π½ΡΠΌΠΈ. | |
|
70 | /// </summary> | |
|
71 | /// <param name="data">ΠΠ°Π½Π½ΡΠ΅ Π΄Π»Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ.</param> | |
|
72 | /// <param name="length">ΠΠ»ΠΈΠ½Π° Π΄Π°Π½Π½ΡΡ Π΄Π»Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ.</param> | |
|
73 | /// <remarks>ΠΠΎΠΏΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π΄Π°Π½Π½ΡΡ Π½Π΅ ΠΏΡΠΎΠΈΡΡ ΠΎΠ΄ΠΈΡ, ΠΏΠ΅ΡΠ΅Π΄Π°Π½Π½ΡΠΉ ΠΌΠ°ΡΡΠΈΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ Π² | |
|
74 | /// ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π²Ρ ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π±ΡΡΡΠ΅ΡΠ°.</remarks> | |
|
75 | public void Feed(char[] data, int length) { | |
|
76 | Safe.ArgumentNotNull(data, "data"); | |
|
77 | Safe.ArgumentInRange(length, 0, data.Length, "length"); | |
|
78 | AssertNotDisposed(); | |
|
79 | ||
|
80 | m_pointer = -1; | |
|
81 | m_buffer = data; | |
|
82 | m_bufferSize = length; | |
|
83 | Shift(); | |
|
84 | } | |
|
85 | ||
|
86 | public void Feed(TextReader reader, bool dispose) { | |
|
87 | Safe.ArgumentNotNull(reader, "reader"); | |
|
88 | AssertNotDisposed(); | |
|
89 | ||
|
90 | if (m_reader != null && m_disposeReader) | |
|
91 | m_reader.Dispose(); | |
|
92 | ||
|
93 | m_reader = reader; | |
|
94 | m_disposeReader = dispose; | |
|
95 | m_pointer = -1; | |
|
96 | m_buffer = new char[m_chunkSize]; | |
|
97 | m_bufferSize = 0; | |
|
98 | Shift(); | |
|
99 | } | |
|
100 | ||
|
101 | /// <summary> | |
|
102 | /// ΠΠΎΠ»ΡΡΠ°Π΅Ρ ΡΠ΅ΠΊΡΡΠΈΠΉ ΡΠΎΠΊΠ΅Π½ Π² Π²ΠΈΠ΄Π΅ ΡΡΡΠΎΠΊΠΈ. | |
|
103 | /// </summary> | |
|
104 | /// <returns></returns> | |
|
105 | protected string GetTokenValue() { | |
|
106 | return new String(m_buffer, m_tokenOffset, m_tokenLen); | |
|
107 | } | |
|
108 | ||
|
109 | /// <summary> | |
|
110 | /// ΠΠ΅ΡΠΊΠΈ ΡΠ΅ΠΊΡΡΠ΅Π³ΠΎ ΡΠΎΠΊΠ΅Π½Π°, ΠΊΠΎΡΠΎΡΡΠ΅ Π±ΡΠ»ΠΈ Π½Π°Π·Π½Π°ΡΠ΅Π½Ρ Π² ΡΠ΅Π³ΡΠ»ΡΡΠ½ΠΎΠΌ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΠΈ. | |
|
111 | /// </summary> | |
|
112 | protected TTag[] TokenTags { | |
|
113 | get { | |
|
114 | return m_currentState.tags; | |
|
115 | } | |
|
116 | } | |
|
117 | ||
|
118 | /// <summary> | |
|
119 | /// ΠΡΠΈΠ·Π½Π°ΠΊ ΠΊΠΎΠ½ΡΠ° Π΄Π°Π½Π½ΡΡ | |
|
120 | /// </summary> | |
|
121 | public bool EOF { | |
|
122 | get { | |
|
123 | return m_pointer >= m_bufferSize; | |
|
124 | } | |
|
125 | } | |
|
126 | ||
|
127 | /// <summary> | |
|
128 | /// Π§ΠΈΡΠ°Π΅Ρ ΡΠ»Π΅Π΄ΡΡΡΠΈΠΉ ΡΠΎΠΊΠ΅Π½, ΠΏΡΠΈ ΡΡΠΎΠΌ <see cref="m_tokenOffset"/> ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° Π½Π°ΡΠ°Π»ΠΎ ΡΠΎΠΊΠ΅Π½Π°, | |
|
129 | /// <see cref="m_tokenLen"/> Π½Π° Π΄Π»ΠΈΠ½Ρ ΡΠΎΠΊΠ΅Π½Π°, <see cref="m_buffer"/> - ΠΌΠ°ΡΡΠΈΠ² ΡΠΈΠΌΠ²ΠΎΠ»ΠΎΠ², Π² | |
|
130 | /// ΠΊΠΎΡΠΎΡΠΎΠΌ Π½Π°Ρ ΠΎΠ΄ΠΈΡΡΡ ΡΠΎΠΊΠ΅Π½. | |
|
131 | /// </summary> | |
|
132 | /// <returns><c>false</c> - Π΄ΠΎΡΡΠΈΠ³Π½ΡΡ ΠΊΠΎΠ½Π΅Ρ Π΄Π°Π½Π½ΡΡ , ΡΠΎΠΊΠ΅Π½ Π½Π΅ ΠΏΡΠΎΡΠΈΡΠ°Π½.</returns> | |
|
133 | protected bool ReadTokenInternal() { | |
|
134 | if (m_pointer >= m_bufferSize) | |
|
135 | return false; | |
|
136 | ||
|
137 | m_currentState = m_config.states[m_config.initialState]; | |
|
138 | m_tokenLen = 0; | |
|
139 | m_tokenOffset = m_pointer; | |
|
140 | int nextState; | |
|
141 | do { | |
|
142 | nextState = m_currentState.transitions[m_previewCode]; | |
|
143 | if (nextState == DFAConst.UNREACHABLE_STATE) { | |
|
144 | if (m_currentState.final) | |
|
145 | return true; | |
|
146 | ||
|
147 | throw new ParserException( | |
|
148 | String.Format( | |
|
149 | "Unexpected symbol '{0}', at pos {1}", | |
|
150 | m_buffer[m_pointer], | |
|
151 | Position | |
|
152 | ) | |
|
153 | ); | |
|
154 | } | |
|
155 | m_currentState = m_config.states[nextState]; | |
|
156 | m_tokenLen++; | |
|
157 | ||
|
158 | } while (Shift()); | |
|
159 | ||
|
160 | // END OF DATA | |
|
161 | if (!m_currentState.final) | |
|
162 | throw new ParserException("Unexpected end of data"); | |
|
163 | ||
|
164 | return true; | |
|
165 | } | |
|
166 | ||
|
167 | ||
|
168 | bool Shift() { | |
|
169 | m_pointer++; | |
|
170 | ||
|
171 | if (m_pointer >= m_bufferSize) { | |
|
172 | if (!ReadNextChunk()) | |
|
173 | return false; | |
|
174 | } | |
|
175 | ||
|
176 | m_previewCode = m_config.alphabet[m_buffer[m_pointer]]; | |
|
177 | ||
|
178 | return true; | |
|
179 | } | |
|
180 | ||
|
181 | bool ReadNextChunk() { | |
|
182 | if (m_reader == null) | |
|
183 | return false; | |
|
184 | ||
|
185 | // extend buffer if nesessary | |
|
186 | if (m_pointer + m_chunkSize > m_buffer.Length) { | |
|
187 | // trim unused buffer head | |
|
188 | var size = m_tokenLen + m_chunkSize; | |
|
189 | if (size >= m_limit) | |
|
190 | throw new ParserException(String.Format("Input buffer {0} bytes limit exceeded", m_limit)); | |
|
191 | var temp = new char[size]; | |
|
192 | Array.Copy(m_buffer, m_tokenOffset, temp, 0, m_tokenLen); | |
|
193 | m_pointer -= m_tokenOffset; | |
|
194 | m_bufferSize -= m_tokenOffset; | |
|
195 | m_tokenOffset = 0; | |
|
196 | m_buffer = temp; | |
|
197 | } | |
|
198 | ||
|
199 | var read = m_reader.Read(m_buffer, m_tokenLen, m_chunkSize); | |
|
200 | if (read == 0) | |
|
201 | return false; | |
|
202 | ||
|
203 | m_bufferSize += read; | |
|
204 | ||
|
205 | return true; | |
|
206 | } | |
|
207 | ||
|
208 | /// <summary> | |
|
209 | /// ΠΠΎΠ·ΠΈΡΠΈΡ ΡΠΊΠ°Π½Π½Π΅ΡΠ° Π²ΠΎ Π²Ρ ΠΎΠ΄Π½ΠΎΠΌ Π±ΡΡΠ΅ΡΠ΅ | |
|
210 | /// </summary> | |
|
211 | public int Position { | |
|
212 | get { | |
|
213 | return m_pointer + 1; | |
|
214 | } | |
|
215 | } | |
|
216 | ||
|
217 | /// <summary> | |
|
218 | /// ΠΡΠ΅ΠΊΠ»ΡΡΠ°Π΅Ρ Π²Π½ΡΡΡΠ΅Π½Π½ΠΈΠΉ ΠΠΠ Π½Π° ΡΠΊΠ°Π·Π°Π½Π½ΡΠΉ, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΡΠ΅Π°Π»ΠΈΠ·ΠΎΠ²Π°ΡΡ ΠΏΠΎΠ΄ΠΎΠ±ΠΈΠ΅ Π·Π°Ρ Π²Π°ΡΡΠ²Π°ΡΡΠ΅ΠΉ | |
|
219 | /// Π³ΡΡΠΏΠΏΠΈΡΠΎΠ²ΠΊΠΈ. | |
|
220 | /// </summary> | |
|
221 | /// <param name = "config"></param> | |
|
222 | protected void Switch(ScannerConfig config) { | |
|
223 | Safe.ArgumentNotNull(config.states, "config.states"); | |
|
224 | ||
|
225 | m_defs.Push(m_config); | |
|
226 | m_config = config; | |
|
227 | ||
|
228 | m_previewCode = m_config.alphabet[m_buffer[m_pointer]]; | |
|
229 | } | |
|
230 | ||
|
231 | /// <summary> | |
|
232 | /// ΠΠΎΡΡΡΠ°Π½Π°Π²Π»ΠΈΠ²Π°Π΅Ρ ΠΏΡΠ΅Π΄ΡΠ΄ΡΡΠ΅ΠΉ ΠΠΠ ΡΠΊΠ°Π½Π½Π΅ΡΠ°. | |
|
233 | /// </summary> | |
|
234 | protected void Restore() { | |
|
235 | if (m_defs.Count == 0) | |
|
236 | throw new InvalidOperationException(); | |
|
237 | m_config = m_defs.Pop(); | |
|
238 | ||
|
239 | m_previewCode = m_config.alphabet[m_buffer[m_pointer]]; | |
|
240 | } | |
|
241 | ||
|
242 | protected override void Dispose(bool disposing) { | |
|
243 | if (disposing) { | |
|
244 | if (m_reader != null && m_disposeReader) | |
|
245 | m_reader.Dispose(); | |
|
246 | m_buffer = null; | |
|
247 | m_bufferSize = 0; | |
|
248 | m_pointer = 0; | |
|
249 | m_tokenLen = 0; | |
|
250 | m_tokenOffset = 0; | |
|
251 | } | |
|
252 | base.Dispose(disposing); | |
|
253 | } | |
|
254 | } | |
|
255 | } |
@@ -1,143 +1,62 | |||
|
1 | 1 | using System; |
|
2 | 2 | using Implab.Automaton.RegularExpressions; |
|
3 | 3 | using Implab.Automaton; |
|
4 | using System.Diagnostics; | |
|
4 | 5 | |
|
5 | 6 | namespace Implab.Formats { |
|
6 | 7 | public struct BufferScanner<TTag> { |
|
7 | char[] m_buffer; | |
|
8 | int m_offset; | |
|
9 | int m_position; | |
|
10 | int m_hi; | |
|
11 | ||
|
12 | readonly int m_chunk; | |
|
13 | readonly int m_limit; | |
|
14 | ||
|
15 | 8 | readonly DFAStateDescriptor<TTag>[] m_dfa; |
|
16 | 9 | int m_state; |
|
10 | int m_pos; | |
|
17 | 11 | |
|
18 |
public BufferScanner(DFAStateDescriptor<TTag>[] dfa, int initialState |
|
|
12 | public BufferScanner(DFAStateDescriptor<TTag>[] dfa, int initialState) { | |
|
19 | 13 | m_dfa = dfa; |
|
20 | 14 | m_state = initialState; |
|
21 | m_chunk = chunk; | |
|
22 | m_limit = limit; | |
|
23 | m_buffer = null; | |
|
24 | m_offset = 0; | |
|
25 | m_position = 0; | |
|
26 | m_hi = 0; | |
|
27 | } | |
|
28 | ||
|
29 | public char[] Buffer { | |
|
30 | get { | |
|
31 | return m_buffer; | |
|
32 | } | |
|
33 | } | |
|
34 | ||
|
35 | public int HiMark { | |
|
36 | get { | |
|
37 | return m_hi; | |
|
38 | } | |
|
39 | 15 | } |
|
40 | 16 | |
|
41 | 17 | public int Position { |
|
42 | get { | |
|
43 | return m_position; | |
|
44 | } | |
|
45 | } | |
|
46 | ||
|
47 | public int Length { | |
|
48 | get { | |
|
49 | return m_hi - m_position; | |
|
50 | } | |
|
51 | } | |
|
52 | ||
|
53 | public int TokenOffset { | |
|
54 | get { | |
|
55 | return m_offset; | |
|
56 | } | |
|
57 | } | |
|
58 | ||
|
59 | public int TokenLength { | |
|
60 | get { | |
|
61 | return m_position - m_offset; | |
|
62 | } | |
|
63 | } | |
|
64 | ||
|
65 | public void Init(char[] buffer, int position, int length) { | |
|
66 | m_buffer = buffer; | |
|
67 | m_position = position; | |
|
68 | m_offset = position; | |
|
69 | m_hi = position + length; | |
|
70 | } | |
|
71 | ||
|
72 | public int Extend() { | |
|
73 | // free space | |
|
74 | var free = m_buffer.Length - m_hi; | |
|
75 | ||
|
76 | // if the buffer have enough free space | |
|
77 | if (free > 0) | |
|
78 | return free; | |
|
79 | ||
|
80 | // effective size of the buffer | |
|
81 | var size = m_buffer.Length - m_offset; | |
|
82 | ||
|
83 | // calculate the new size | |
|
84 | int grow = Math.Min(m_limit - size, m_chunk); | |
|
85 | if (grow <= 0) | |
|
86 | throw new ParserException(String.Format("Input buffer {0} bytes limit exceeded", m_limit)); | |
|
87 | ||
|
88 | var temp = new char[size + grow]; | |
|
89 | Array.Copy(m_buffer, m_offset, temp, 0, m_hi - m_offset); | |
|
90 | m_position -= m_offset; | |
|
91 | m_hi -= m_offset; | |
|
92 | m_offset = 0; | |
|
93 | m_buffer = temp; | |
|
94 | ||
|
95 | return free + grow; | |
|
96 | } | |
|
97 | ||
|
98 | public void RaiseMark(int size) { | |
|
99 | m_hi += size; | |
|
18 | get { return m_pos; } | |
|
100 | 19 | } |
|
101 | 20 | |
|
102 | 21 | /// <summary> |
|
103 | 22 | /// Scan this instance. |
|
104 | 23 | /// </summary> |
|
105 | 24 | /// <returns><c>true</c> - additional data required</returns> |
|
106 | public bool Scan() { | |
|
107 |
|
|
|
108 |
|
|
|
109 | var next = m_dfa[m_state].transitions[(int)ch]; | |
|
25 | public bool Scan(int[] buffer, int position, int length) { | |
|
26 | var hi = position + length; | |
|
27 | m_pos = position; | |
|
28 | ||
|
29 | while (position < hi) { | |
|
30 | var next = m_dfa[m_state].transitions[buffer[position]]; | |
|
110 | 31 | if (next == DFAConst.UNREACHABLE_STATE) { |
|
111 | 32 | if (m_dfa[m_state].final) |
|
112 | 33 | return false; |
|
113 | 34 | |
|
114 | 35 | throw new ParserException( |
|
115 | 36 | String.Format( |
|
116 |
"Unexpected |
|
|
117 | new string(m_buffer, m_offset, m_position - m_offset) | |
|
37 | "Unexpected symbol" | |
|
118 | 38 | ) |
|
119 | 39 | ); |
|
120 | 40 | } |
|
41 | m_pos++; | |
|
121 | 42 | m_state = next; |
|
122 | m_position++; | |
|
123 | 43 | } |
|
124 | 44 | |
|
125 | 45 | return true; |
|
126 | 46 | } |
|
127 | 47 | |
|
128 | 48 | public void Eof() { |
|
129 | 49 | if (!m_dfa[m_state].final) |
|
130 | 50 | throw new ParserException( |
|
131 | 51 | String.Format( |
|
132 |
"Unexpected |
|
|
133 | new string(m_buffer, m_offset, m_position - m_offset) | |
|
52 | "Unexpected EOF" | |
|
134 | 53 | ) |
|
135 | 54 | ); |
|
136 | 55 | } |
|
137 | 56 | |
|
138 | 57 | public TTag[] GetTokenTags() { |
|
139 | 58 | return m_dfa[m_state].tags; |
|
140 | 59 | } |
|
141 | 60 | } |
|
142 | 61 | } |
|
143 | 62 |
@@ -1,72 +1,61 | |||
|
1 | 1 | using System; |
|
2 | 2 | using Implab.Components; |
|
3 | 3 | |
|
4 | 4 | namespace Implab.Formats { |
|
5 | 5 | public abstract class TextScanner<TTag> : Disposable { |
|
6 | 6 | |
|
7 |
|
|
|
8 |
int m_ |
|
|
9 |
int m_ |
|
|
10 | int m_tokenOffset; | |
|
7 | readonly int[] m_buffer; | |
|
8 | int m_bufferOffset; | |
|
9 | int m_dataLength; | |
|
11 | 10 | int m_tokenLength; |
|
11 | ||
|
12 | 12 | TTag[] m_tags; |
|
13 | 13 | |
|
14 | 14 | BufferScanner<TTag> m_scanner; |
|
15 | 15 | |
|
16 | 16 | protected bool ReadTokenInternal() { |
|
17 | 17 | if (EOF) |
|
18 | 18 | return false; |
|
19 | 19 | |
|
20 |
// create a new scanner from template (scanners are |
|
|
20 | // create a new scanner from template (scanners are value types) | |
|
21 | 21 | var inst = m_scanner; |
|
22 | 22 | |
|
23 | // initialize the scanner | |
|
24 | inst.Init(m_buffer, m_offset, m_length); | |
|
23 | m_tokenLength = 0; | |
|
24 | ||
|
25 | while (inst.Scan(m_buffer, m_bufferOffset, m_dataLength)) { | |
|
26 | m_tokenLength += m_dataLength; | |
|
27 | ||
|
28 | var actual = Read(m_buffer, 0, m_buffer.Length); | |
|
29 | ||
|
30 | m_bufferOffset = 0; | |
|
31 | m_dataLength = actual; | |
|
25 | 32 | |
|
26 | // do work | |
|
27 |
|
|
|
28 |
|
|
|
33 | if (actual == 0) { | |
|
34 | inst.Eof(); | |
|
35 | break; | |
|
36 | } | |
|
37 | } | |
|
38 | ||
|
39 | var len = inst.Position - m_bufferOffset; | |
|
40 | m_tokenLength += len; | |
|
41 | m_dataLength -= len; | |
|
42 | m_bufferOffset = inst.Position; | |
|
29 | 43 | |
|
30 | 44 | // save result; |
|
31 | m_buffer = inst.Buffer; | |
|
32 | m_length = inst.Length; | |
|
33 | m_offset = inst.Position; | |
|
34 | m_tokenOffset = inst.TokenOffset; | |
|
35 | m_tokenLength = inst.TokenLength; | |
|
36 | ||
|
45 | ||
|
37 | 46 | m_tags = inst.GetTokenTags(); |
|
38 | 47 | } |
|
39 | 48 | |
|
40 | protected string GetToken() { | |
|
41 | return new String(m_buffer, m_tokenOffset, m_tokenLength); | |
|
42 | } | |
|
49 | protected abstract int Read(int[] buffer, int offset, int size); | |
|
43 | 50 | |
|
44 | 51 | protected TTag[] Tags { |
|
45 | 52 | get { |
|
46 | 53 | return m_tags; |
|
47 | 54 | } |
|
48 | 55 | } |
|
49 | 56 | |
|
50 | /// <summary> | |
|
51 | /// Feed the specified scanner. | |
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52 | /// </summary> | |
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53 | /// <param name="scanner">Scanner.</param> | |
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54 | /// <example> | |
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55 | /// protected override void Feed(ref BufferScanner<TTag> scanner) { | |
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56 | /// var size = scanner.Extend(); | |
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57 | /// var actual = m_reader.Read(scanner.Buffer, scanner.HiMark, size); | |
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58 | /// if (actual == 0) { | |
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59 | /// m_eof = true; | |
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60 | /// scanner.Eof(); | |
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61 | /// } else { | |
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62 | /// scanner.RaiseHiMark(actual); | |
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63 | /// } | |
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64 | /// } | |
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65 | /// </example> | |
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66 | protected abstract void Feed(ref BufferScanner<TTag> scanner); | |
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67 | ||
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68 | 57 | public abstract bool EOF { get; } |
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69 | ||
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58 | ||
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70 | 59 | } |
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71 | 60 | } |
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72 | 61 |
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