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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtScript module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #ifndef QSCRIPTSYNTAXCHECKER_H |
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43 #define QSCRIPTSYNTAXCHECKER_H |
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44 |
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45 // |
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46 // W A R N I N G |
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47 // ------------- |
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48 // |
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49 // This file is not part of the Qt API. It exists purely as an |
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50 // implementation detail. This header file may change from version to |
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51 // version without notice, or even be removed. |
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52 // |
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53 // We mean it. |
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54 // |
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55 |
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56 #include <QtCore/qstring.h> |
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57 |
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58 #include "qscriptgrammar_p.h" |
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59 |
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60 QT_BEGIN_NAMESPACE |
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61 |
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62 namespace QScript { |
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63 |
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64 class Lexer; |
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65 |
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66 class SyntaxChecker: protected QScriptGrammar |
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67 { |
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68 public: |
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69 enum State { |
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70 Error, |
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71 Intermediate, |
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72 Valid, |
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73 }; |
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74 |
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75 struct Result { |
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76 Result(State s, int ln, int col, const QString &msg) |
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77 : state(s), errorLineNumber(ln), errorColumnNumber(col), |
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78 errorMessage(msg) {} |
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79 State state; |
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80 int errorLineNumber; |
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81 int errorColumnNumber; |
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82 QString errorMessage; |
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83 }; |
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84 |
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85 SyntaxChecker(); |
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86 ~SyntaxChecker(); |
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87 |
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88 Result checkSyntax(const QString &code); |
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89 |
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90 protected: |
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91 bool automatic(QScript::Lexer *lexer, int token) const; |
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92 inline void reallocateStack(); |
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93 |
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94 protected: |
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95 int tos; |
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96 int stack_size; |
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97 int *state_stack; |
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98 }; |
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99 |
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100 inline void SyntaxChecker::reallocateStack() |
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101 { |
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102 if (! stack_size) |
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103 stack_size = 128; |
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104 else |
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105 stack_size <<= 1; |
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106 |
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107 state_stack = reinterpret_cast<int*> (qRealloc(state_stack, stack_size * sizeof(int))); |
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108 } |
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109 |
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110 } // namespace QScript |
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111 |
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112 QT_END_NAMESPACE |
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113 |
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114 #endif |