TagParser.h

Go to the documentation of this file.

/*---------------------------------------------------------------------\
|                          ____ _   __ __ ___                          |
|                         |__  / \ / / . \ . \                         |
|                           / / \ V /|  _/  _/                         |
|                          / /__ | | | | | |                           |
|                         /_____||_| |_| |_|                           |
|                                                                      |
\---------------------------------------------------------------------*/
#ifndef ZYPP_PARSER_TAGPARSER_H
#define ZYPP_PARSER_TAGPARSER_H

#include <iosfwd>
#include <string>
#include <list>

#include "zypp/base/PtrTypes.h"
#include "zypp/base/NonCopyable.h"
#include "zypp/base/InputStream.h"

#include "zypp/ProgressData.h"

namespace zypp
{ 

  namespace parser
  { 

    //
    //  CLASS NAME : TagParser
    //
    class TagParser : private base::NonCopyable
    {
    public:

      struct Tag
      {
        Tag( unsigned lineNo_r = 0, std::streamoff tagStart_r = -1 )
          : lineNo( lineNo_r ), tagStart( tagStart_r ), dataStart( -1 ), dataLength( 0 )
        {}
        std::string asString() const;

        unsigned       lineNo;
        std::streamoff tagStart;
        std::streamoff dataStart;
        std::streamoff dataLength;

        std::string    name;
        std::string    modifier;
      };

      struct SingleTag : Tag
      {
        SingleTag( unsigned lineNo_r = 0, std::streamoff tagStart_r = -1 )
          : Tag( lineNo_r, tagStart_r )
        {}
        std::string value;
      };

      struct MultiTag : Tag
      {
        MultiTag( unsigned lineNo_r = 0, std::streamoff tagStart_r = -1 )
          : Tag( lineNo_r, tagStart_r )
        {}
        std::list<std::string> value;
      };

      typedef shared_ptr<SingleTag> SingleTagPtr;
      typedef shared_ptr<MultiTag> MultiTagPtr;

    public:
      TagParser();
      virtual ~TagParser();
      virtual void parse( const InputStream & input_r,
                          const ProgressData::ReceiverFnc & fnc_r = ProgressData::ReceiverFnc() );

    protected:
      virtual void beginParse();
      virtual void consume( const SingleTagPtr & tag_r );
      virtual void consume( const MultiTagPtr & tag_r );
      virtual void endParse();

    protected:
      virtual void userRequestedAbort( unsigned lineNo_r );

    protected:
      std::string errPrefix( unsigned lineNo_r,
                             const std::string & msg_r = std::string() ) const;
      std::string errPrefix( const SingleTagPtr & tag_r,
                             const std::string & msg_r = std::string() ) const;
      std::string errPrefix( const MultiTagPtr & tag_r,
                             const std::string & msg_r = std::string() ) const;
      const std::string & inputname() const
      { return _inputname; }

    private:
      std::string _inputname;
    };

    std::ostream & operator<<( std::ostream & str, const TagParser::Tag & obj );

    std::ostream & operator<<( std::ostream & str, const TagParser::SingleTag & obj );

    std::ostream & operator<<( std::ostream & str, const TagParser::MultiTag & obj );

  } // namespace parser
} // namespace zypp
#endif // ZYPP_PARSER_TAGPARSER_H

---