filteringdatasource.h

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/* This software and supporting documentation are distributed by
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#ifndef SOMAIO_DATASOURCE_FILTERINGDATASOURCE_H
#define SOMAIO_DATASOURCE_FILTERINGDATASOURCE_H
//--- somaio -----------------------------------------------------------------
#include <soma-io/config/soma_config.h>
#include <soma-io/datasource/chaindatasource.h>                  // base class
//--- system -----------------------------------------------------------------
#include <string>
//----------------------------------------------------------------------------
 
namespace soma
{

  class FilteringDataSource : public ChainDataSource
  {
  public:
    FilteringDataSource( carto::rc_ptr<DataSource> in, int line_num = 1 );
    virtual ~FilteringDataSource();
 
    virtual DataSource* clone() const;
    virtual int iterateMode() const;
    virtual offset_t size() const;
    virtual offset_t at() const;
    virtual bool at( offset_t pos );
    virtual long readBlock( char* data, unsigned long maxlen );
    virtual long writeBlock( const char* data, unsigned long len );
    virtual int getch();
    virtual int putch( int ch );
    virtual bool ungetch( int ch );
    virtual bool allowsMemoryMapping() const;
 
    bool filtersComments() const;
    bool countsLines() const;
    void setFiltersComments( bool );
    void setCountsLines( bool );
    int lineNumber() const;
    void setLineNumber( int );
    std::string commentTag() const;
    void setCommentTag( const std::string & );
 
  protected:
    bool        _filtercomments;
    bool        _countlines;
    int         _line;
    std::string _commenttag;
  };
 
}
 
#endif