lexer.h
// -*- c-basic-offset: 2 -*-
/*
* This file is part of the KDE libraries
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef _KJSLEXER_H_
#define _KJSLEXER_H_
#include "ustring.h"
namespace KJS {
class Identifier;
class RegExp;
class Lexer {
public:
Lexer();
~Lexer();
static Lexer *curr();
void setCode(const UChar *c, unsigned int len);
int lex();
int lineNo() const { return yylineno + 1; }
bool prevTerminator() const { return terminator; }
enum State { Start,
IdentifierOrKeyword,
Identifier,
InIdentifierOrKeyword,
InIdentifier,
InIdentifierUnicodeEscapeStart,
InIdentifierUnicodeEscape,
InSingleLineComment,
InMultiLineComment,
InNum,
InNum0,
InHex,
InOctal,
InDecimal,
InExponentIndicator,
InExponent,
Hex,
Octal,
Number,
String,
Eof,
InString,
InEscapeSequence,
InHexEscape,
InUnicodeEscape,
Other,
Bad };
bool scanRegExp();
UString pattern, flags;
bool hadError() const { return foundBad; }
static bool isWhiteSpace(unsigned short c);
static bool isIdentLetter(unsigned short c);
static bool isDecimalDigit(unsigned short c);
static bool isHexDigit(unsigned short c);
static bool isOctalDigit(unsigned short c);
private:
int yylineno;
bool done;
char *buffer8;
UChar *buffer16;
unsigned int size8, size16;
unsigned int pos8, pos16;
bool terminator;
bool restrKeyword;
// encountered delimiter like "'" and "}" on last run
bool delimited;
bool skipLF;
bool skipCR;
bool convertNextIdentifier;
int stackToken;
int lastToken;
bool foundBad;
State state;
void setDone(State s);
unsigned int pos;
void shift(unsigned int p);
void nextLine();
int lookupKeyword(const char *);
int matchPunctuator(unsigned short c1, unsigned short c2,
unsigned short c3, unsigned short c4);
unsigned short singleEscape(unsigned short c) const;
unsigned short convertOctal(unsigned short c1, unsigned short c2,
unsigned short c3) const;
public:
static unsigned char convertHex(unsigned short c1);
static unsigned char convertHex(unsigned short c1, unsigned short c2);
static UChar convertUnicode(unsigned short c1, unsigned short c2,
unsigned short c3, unsigned short c4);
#ifdef KJS_DEBUG_MEM
static void globalClear();
#endif
void doneParsing();
private:
void record8(unsigned short c);
void record16(int c);
void record16(UChar c);
KJS::Identifier *makeIdentifier(UChar *buffer, unsigned int pos);
UString *makeUString(UChar *buffer, unsigned int pos);
const UChar *code;
unsigned int length;
int yycolumn;
#ifndef KJS_PURE_ECMA
int bol; // begin of line
#endif
// current and following unicode characters (int to allow for -1 for end-of-file marker)
int current, next1, next2, next3;
UString **strings;
unsigned int numStrings;
unsigned int stringsCapacity;
KJS::Identifier **identifiers;
unsigned int numIdentifiers;
unsigned int identifiersCapacity;
// for future extensions
class LexerPrivate;
LexerPrivate *priv;
};
} // namespace
#endif
KJS::Identifier
Represents an Identifier for a Javascript object.
Definition: identifier.h:32

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