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39 | |
40 | #ifndef QSCRIPTSYNTAXCHECKER_H |
41 | #define QSCRIPTSYNTAXCHECKER_H |
42 | |
43 | // |
44 | // W A R N I N G |
45 | // ------------- |
46 | // |
47 | // This file is not part of the Qt API. It exists purely as an |
48 | // implementation detail. This header file may change from version to |
49 | // version without notice, or even be removed. |
50 | // |
51 | // We mean it. |
52 | // |
53 | |
54 | #include <QtCore/qstring.h> |
55 | |
56 | #include "qscriptgrammar_p.h" |
57 | |
58 | #include <stdlib.h> |
59 | |
60 | QT_BEGIN_NAMESPACE |
61 | |
62 | namespace QScript { |
63 | |
64 | class Lexer; |
65 | |
66 | class SyntaxChecker: protected QScriptGrammar |
67 | { |
68 | public: |
69 | enum State { |
70 | Error, |
71 | Intermediate, |
72 | Valid, |
73 | }; |
74 | |
75 | struct Result { |
76 | Result(State s, int ln, int col, const QString &msg) |
77 | : state(s), errorLineNumber(ln), errorColumnNumber(col), |
78 | errorMessage(msg) {} |
79 | State state; |
80 | int errorLineNumber; |
81 | int errorColumnNumber; |
82 | QString errorMessage; |
83 | }; |
84 | |
85 | SyntaxChecker(); |
86 | ~SyntaxChecker(); |
87 | |
88 | Result checkSyntax(const QString &code); |
89 | |
90 | protected: |
91 | bool automatic(QScript::Lexer *lexer, int token) const; |
92 | inline void reallocateStack(); |
93 | |
94 | protected: |
95 | int tos; |
96 | int stack_size; |
97 | int *state_stack; |
98 | }; |
99 | |
100 | inline void SyntaxChecker::reallocateStack() |
101 | { |
102 | if (! stack_size) |
103 | stack_size = 128; |
104 | else |
105 | stack_size <<= 1; |
106 | |
107 | state_stack = reinterpret_cast<int*> (realloc(ptr: state_stack, size: stack_size * sizeof(int))); |
108 | } |
109 | |
110 | } // namespace QScript |
111 | |
112 | QT_END_NAMESPACE |
113 | |
114 | #endif |
115 | |