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/*
**************************************************************************
description
--------------------
copyright : (C) 2000-2001 by Andreas Zehender
email : [email protected]
**************************************************************************
**************************************************************************
* *
* 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. *
* *
**************************************************************************/
#ifndef PMSCANNER_H
#define PMSCANNER_H
#include <tqiodevice.h>
#include <tqstring.h>
#include <tqasciidict.h>
/**
* Dictionary of reserved words for fast lookup
*
* The class @ref PMScanner has two static dictionaries: one for reserved
* words and one for directives. The constructor will insert the items.
*/
class PMReservedWordDict : protected TQAsciiDict<int>
{
public:
/**
* Mode for constructor.
*/
enum PMDictMode { PMDReservedWords, PMDDirectives };
/**
* Creates a dictionary for povray reserved words or directives.
*/
PMReservedWordDict( PMDictMode mode );
/**
* Deletes the dictionary
*/
~PMReservedWordDict( );
/**
* Returns the token constant for the key if found, otherwise -1
*/
int operator[] ( const char* key ) const { return find( key ); }
/**
* Returns the token constant for the key if found, otherwise -1
*/
int find( const char* key ) const
{
int* result = TQAsciiDict<int>::find( key );
if( result )
return *result;
return -1;
}
};
/**
* Scanner that scans povray tokens out of a TQIODevice
*/
class PMScanner
{
public:
/**
* Creates a scanner that scans the TQIODevice device
*/
PMScanner( TQIODevice* device );
/**
* Deletes the scanner
*/
~PMScanner( );
/**
* Scans the device for the next token. Returns a value of @ref PMToken
* ( > 0xFF ) or a single character
*/
int nextToken( );
/**
* Returns the current token
*/
int currentToken( ) const { return m_token; }
/**
* Returns the integer value of the current token if currentToken
* is INTEGER_TOK
*/
int iValue( ) const { return m_ivalue; }
/**
* Returns the double value of the current token if currentToken
* is FLOAT_TOK
*/
double fValue( ) const { return m_fvalue; }
/**
* Returns the string value of the current token if currentToken
* is ID_TOK, COMMENT_TOK, STRING_TOK
*/
const char* sValue( ) const { return m_svalue; }
/**
* Returns the current line number
*/
int currentLine( ) const { return m_line; }
/**
* Returns the error string if current token is SCANNER_ERROR_TOK
*/
TQString error( ) const { return m_error; }
/**
* Special parse method for a function statement
*/
void scanFunction( );
/**
* Returns a pointer to a dictionary with reserved words
*/
static PMReservedWordDict* reservedWords( ) { return &m_reservedWords; }
/**
* Returns a pointer to a dictionary with directives
*/
static PMReservedWordDict* directives( ) { return &m_directives; }
private:
/**
* returns true if c is one of the following characters:
* space, tab, newline, '{', '}', '<', '>', '+', '-', '*', '/', ',',
* '(', ')', '=', '[', ']', ';'
*/
inline bool isseparation( int c );
/**
* Called on unexpected character
*/
void scanError( int c );
/**
* Reads the next character out of the device
*/
inline void nextChar( );
/**
* Adds the char to m_svalue
*/
inline void addChar( char c );
/**
* Clears m_svalue
*/
inline void clearSValue( );
static PMReservedWordDict m_reservedWords;
static PMReservedWordDict m_directives;
/**
* States for the state machine of the scanner
*/
enum PMScanStates
{
START_ST = 0, ID_ENDST, INTEGER_ENDST,
FLOAT1_ST, FLOAT_ENDST, FLOAT_EXP1_ST, FLOAT_EXP2_ST, FLOAT_EXP_ENDST,
POINT_ST,
DIRECTIVE1_ST, DIRECTIVE_ENDST,
STRING1_ST, STRINGBS_ST,
SLASH_ST, LINE_COMMENT_FIRST_ST, LINE_COMMENT_ST,
C_COMMENT_ST, COMMENT_ST_ST, COMMENT_SL_ST, COMMENT_NEW_LINE_ST,
PMNAME_ST,
RAW_POVRAY_FIRST_ST, RAW_POVRAY_LB_ST, RAW_POVRAY_ST, RAW_POVRAY_END_ST,
RAW_POVRAY_END_END_ST,
TOKEN_END_ST
};
TQIODevice* m_pDevice;
int m_char;
int m_token;
int m_ivalue;
double m_fvalue;
char* m_svalue;
char* m_lastChar;
char* m_lastAlloc;
unsigned int m_svalueAlloc;
int m_indentation;
int m_rawIndentation;
int m_rawPovrayEnd;
bool m_bFunctionMode;
int m_line;
TQString m_error;
};
#endif
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