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/*
* Copyright (c) 2009 Samit Basu
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __Scanner_hpp__
#define __Scanner_hpp__
#include "Token.hpp"
#include <QString>
#include <QStack>
class Scanner {
QString m_filename;
QString m_text;
int m_ptr;
int m_strlen;
int m_linenumber;
QStack<bool> m_ignorews;
Token m_tok;
bool m_tokValid;
bool m_debugFlag;
bool m_inContinuationState;
int m_bracketDepth;
bool m_blobFlag;
TokenValueType current();
TokenValueType previous();
TokenValueType ahead(int n);
void fetch();
void fetchWhitespace();
void fetchIdentifier();
void fetchComment();
void fetchContinuation();
void fetchNumber();
void fetchString();
void fetchBlob();
void fetchOther();
bool tryFetchBinary(const char* op, TokenValueType tok);
void setToken(TokenValueType tok, QString text = QString());
bool isBreakpointLine(int num);
void deleteBreakpoint(int num);
public:
Scanner(QString buf, QString fname);
// Methods accessed by the parser
const Token& next();
void consume();
bool match(TokenValueType tok);
void setDebug(bool debugFlag) {m_debugFlag = debugFlag;}
// Warning: Ugly Hack. When in Special Call mode, the
// rules for what constitutes a string change completely.
void setBlobMode(bool blobFlag) {m_blobFlag = blobFlag;}
void pushWSFlag(bool ignoreWS);
void popWSFlag();
bool done();
bool peek(int chars, TokenValueType tok);
unsigned position() {return m_ptr;}
unsigned contextNum();
QString context(unsigned pos);
QString context();
QString snippet(unsigned pos1, unsigned pos2);
bool inContinuationState();
bool inBracket();
};
#endif
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