| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtScript module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
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| ** accordance with the commercial license agreement provided with the |
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| ** GNU Lesser General Public License Usage |
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| ** packaging of this file. Please review the following information to |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| #ifndef QSCRIPTLEXER_P_H |
| #define QSCRIPTLEXER_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtCore/qstring.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QScriptEnginePrivate; |
| class QScriptNameIdImpl; |
| |
| namespace QScript { |
| |
| class Lexer |
| { |
| public: |
| Lexer(QScriptEnginePrivate *eng); |
| ~Lexer(); |
| |
| void setCode(const QString &c, int lineno); |
| int lex(); |
| |
| int currentLineNo() const { return yylineno; } |
| int currentColumnNo() const { return yycolumn; } |
| |
| int startLineNo() const { return startlineno; } |
| int startColumnNo() const { return startcolumn; } |
| |
| int endLineNo() const { return currentLineNo(); } |
| int endColumnNo() const |
| { int col = currentColumnNo(); return (col > 0) ? col - 1 : col; } |
| |
| bool prevTerminator() const { return terminator; } |
| |
| enum State { Start, |
| Identifier, |
| InIdentifier, |
| InSingleLineComment, |
| InMultiLineComment, |
| InNum, |
| InNum0, |
| InHex, |
| InOctal, |
| InDecimal, |
| InExponentIndicator, |
| InExponent, |
| Hex, |
| Octal, |
| Number, |
| String, |
| Eof, |
| InString, |
| InEscapeSequence, |
| InHexEscape, |
| InUnicodeEscape, |
| Other, |
| Bad }; |
| |
| enum Error { |
| NoError, |
| IllegalCharacter, |
| UnclosedStringLiteral, |
| IllegalEscapeSequence, |
| IllegalUnicodeEscapeSequence, |
| UnclosedComment, |
| IllegalExponentIndicator, |
| IllegalIdentifier |
| }; |
| |
| enum ParenthesesState { |
| IgnoreParentheses, |
| CountParentheses, |
| BalancedParentheses |
| }; |
| |
| enum RegExpBodyPrefix { |
| NoPrefix, |
| EqualPrefix |
| }; |
| |
| bool scanRegExp(RegExpBodyPrefix prefix = NoPrefix); |
| |
| QScriptNameIdImpl *pattern; |
| int flags; |
| |
| State lexerState() const |
| { return state; } |
| |
| QString errorMessage() const |
| { return errmsg; } |
| void setErrorMessage(const QString &err) |
| { errmsg = err; } |
| void setErrorMessage(const char *err) |
| { setErrorMessage(QString::fromLatin1(err)); } |
| |
| Error error() const |
| { return err; } |
| void clearError() |
| { err = NoError; } |
| |
| private: |
| QScriptEnginePrivate *driver; |
| int yylineno; |
| bool done; |
| char *buffer8; |
| QChar *buffer16; |
| uint size8, size16; |
| uint pos8, pos16; |
| bool terminator; |
| bool restrKeyword; |
| // encountered delimiter like "'" and "}" on last run |
| bool delimited; |
| int stackToken; |
| |
| State state; |
| void setDone(State s); |
| uint pos; |
| void shift(uint p); |
| int lookupKeyword(const char *); |
| |
| bool isWhiteSpace() const; |
| bool isLineTerminator() const; |
| bool isHexDigit(ushort c) const; |
| bool isOctalDigit(ushort c) const; |
| |
| int matchPunctuator(ushort c1, ushort c2, |
| ushort c3, ushort c4); |
| ushort singleEscape(ushort c) const; |
| ushort convertOctal(ushort c1, ushort c2, |
| ushort c3) const; |
| public: |
| static unsigned char convertHex(ushort c1); |
| static unsigned char convertHex(ushort c1, ushort c2); |
| static QChar convertUnicode(ushort c1, ushort c2, |
| ushort c3, ushort c4); |
| static bool isIdentLetter(ushort c); |
| static bool isDecimalDigit(ushort c); |
| |
| inline int ival() const { return qsyylval.ival; } |
| inline double dval() const { return qsyylval.dval; } |
| inline QScriptNameIdImpl *ustr() const { return qsyylval.ustr; } |
| |
| const QChar *characterBuffer() const { return buffer16; } |
| int characterCount() const { return pos16; } |
| |
| private: |
| void record8(ushort c); |
| void record16(QChar c); |
| void recordStartPos(); |
| |
| int findReservedWord(const QChar *buffer, int size) const; |
| |
| void syncProhibitAutomaticSemicolon(); |
| |
| const QChar *code; |
| uint length; |
| int yycolumn; |
| int startlineno; |
| int startcolumn; |
| int bol; // begin of line |
| |
| union { |
| int ival; |
| double dval; |
| QScriptNameIdImpl *ustr; |
| } qsyylval; |
| |
| // current and following unicode characters |
| ushort current, next1, next2, next3; |
| |
| struct keyword { |
| const char *name; |
| int token; |
| }; |
| |
| QString errmsg; |
| Error err; |
| |
| bool wantRx; |
| bool check_reserved; |
| |
| ParenthesesState parenthesesState; |
| int parenthesesCount; |
| bool prohibitAutomaticSemicolon; |
| }; |
| |
| } // namespace QScript |
| |
| QT_END_NAMESPACE |
| |
| #endif |