parser.h

linux qt资料

#ifndef PARSER_H
#define PARSER_H

#include <qstring.h>

class ParsedArray
{
public:

    ParsedArray(int numRows, int numCols);
    ~ParsedArray();

    enum Type { Unknown, Error, String, Number };
    Type type( int row, int col );
    
    QString calc( int row, int col, bool *ok=0);
    bool recalc( int row, int col );

    QString stringVal( int row, int col );
    double  doubleVal( int row, int col );
    int  intVal( int row, int col ) { return (int) doubleVal(row,col); }

    
    QString     rawText( int row, int col );
    void        setText( int row, int col, QString ); //shallow copy

private:
    struct Data
    {
	QString text;
	Type   type;
	double val;
    };
    Data *data;
    int numCols;
    int numRows;

    Data *current;
    short index; // opt: later const char *

    char getc();
    void putback();

    Type parseExpr( double & );
    Type parseTerm( double & );
    Type parseFactor( double & );
    Type parseRef( double & );
    Type parseNumber( double & );
    Type parseInt( int & );
    
    int idx( int r, int c ) const { return c+r*numCols; }
    bool isValid( int r, int c ) const 
    { return (uint) r < (uint) numRows && (uint) c < (uint) numCols; } //Ugle
};

#endif