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//##########################################################################
//# #
//# CLOUDCOMPARE #
//# #
//# 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; version 2 or later of the License. #
//# #
//# 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. #
//# #
//# COPYRIGHT: EDF R&D / TELECOM ParisTech (ENST-TSI) #
//# #
//##########################################################################
#ifndef PDMS_PARSER_HEADER
#define PDMS_PARSER_HEADER
#include "PdmsTools.h"
//Qt
#include <QString>
#include <QFile>
//system
#include <map>
using namespace PdmsTools;
//! PDMS Lexer
/** PDMS sessions are made to provide an input stream to the parser (file, keyboard, pipe, ...)
**/
class PdmsLexer
{
public:
PdmsLexer();
virtual ~PdmsLexer() = default;
virtual bool initializeSession();
bool gotoNextToken();
void finish() {stop = true;}
virtual void closeSession(bool destroyLoadedObject=false);
PointCoordinateType valueFromBuffer();
const char* nameFromBuffer() const;
virtual void printWarning(const char* str) = 0;
Token getCurrentToken() const {return currentToken;}
PdmsObjects::GenericItem* getLoadedObject() const {return loadedObject;}
const char* getBufferContent() const {return tokenBuffer;}
void setLoadedObject(PdmsObjects::GenericItem *o) {loadedObject = o;}
protected:
/** \warning Never pass a 'constant initializer' by reference
**/
static const int c_max_buff_size = 2048;
PdmsObjects::GenericItem *loadedObject;
Token currentToken;
char tokenBuffer[c_max_buff_size];
char nextBuffer[c_max_buff_size];
std::map<std::string, Token> dictionary;
bool stop;
char metaGroupMask;
void pushIntoDictionary(const char *str, Token token, int minSize=0);
virtual void parseCurrentToken();
virtual void skipComment() = 0;
virtual void skipHandleCommand() = 0;
virtual bool moveForward();
};
//Pdms file session
class PdmsFileSession : public PdmsLexer
{
protected:
QString m_filename;
int m_currentLine;
bool m_eol;
bool m_eof;
QFile m_file;
public:
PdmsFileSession(const QString& filename);
~PdmsFileSession() override { closeSession(); }
bool initializeSession() override;
void closeSession(bool destroyLoadedObject=false) override;
void printWarning(const char* str) override;
protected:
void parseCurrentToken() override;
bool moveForward() override;
void skipComment() override;
void skipHandleCommand() override;
int readChar();
};
//PDMS Parser
/** Use this parser the following way:
1- create any Pdms session
2- link parser with the session
3- parse the current session content. if the session content changes, you can parse it as many
times as you wish (the loaded object is overwritten each time)
4- get the result (either in session or in parser)
**/
class PdmsParser
{
public:
//! Default constructor
PdmsParser();
~PdmsParser();
void reset();
void linkWithSession(PdmsLexer *s);
bool parseSessionContent();
PdmsObjects::GenericItem *getLoadedObject(bool forgetIt = true);
protected:
bool processCurrentToken();
PdmsLexer *session;
PdmsCommands::Command *currentCommand;
PdmsObjects::GenericItem *currentItem;
PdmsObjects::GenericItem *root;
};
#endif //PDMS_PARSER_HEADER
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