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/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef LiteralParser_h
#define LiteralParser_h
#include "JSGlobalObjectFunctions.h"
#include "JSValue.h"
#include "UString.h"
namespace JSC {
class LiteralParser {
public:
typedef enum { StrictJSON, NonStrictJSON } ParserMode;
LiteralParser(ExecState* exec, const UString& s, ParserMode mode)
: m_exec(exec)
, m_lexer(s, mode)
, m_mode(mode)
{
}
JSValue tryLiteralParse()
{
m_lexer.next();
JSValue result = parse(m_mode == StrictJSON ? StartParseExpression : StartParseStatement);
if (m_lexer.currentToken().type != TokEnd)
return JSValue();
return result;
}
private:
enum ParserState { StartParseObject, StartParseArray, StartParseExpression,
StartParseStatement, StartParseStatementEndStatement,
DoParseObjectStartExpression, DoParseObjectEndExpression,
DoParseArrayStartExpression, DoParseArrayEndExpression };
enum TokenType { TokLBracket, TokRBracket, TokLBrace, TokRBrace,
TokString, TokIdentifier, TokNumber, TokColon,
TokLParen, TokRParen, TokComma, TokTrue, TokFalse,
TokNull, TokEnd, TokError };
class Lexer {
public:
struct LiteralParserToken {
TokenType type;
const UChar* start;
const UChar* end;
UString stringToken;
double numberToken;
};
Lexer(const UString& s, ParserMode mode)
: m_string(s)
, m_mode(mode)
, m_ptr(s.data())
, m_end(s.data() + s.size())
{
}
TokenType next()
{
return lex(m_currentToken);
}
const LiteralParserToken& currentToken()
{
return m_currentToken;
}
private:
TokenType lex(LiteralParserToken&);
template <ParserMode mode> TokenType lexString(LiteralParserToken&);
TokenType lexNumber(LiteralParserToken&);
LiteralParserToken m_currentToken;
UString m_string;
ParserMode m_mode;
const UChar* m_ptr;
const UChar* m_end;
};
class StackGuard;
JSValue parse(ParserState);
ExecState* m_exec;
LiteralParser::Lexer m_lexer;
ParserMode m_mode;
};
}
#endif
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