void open( const std::string& anchorFile ) {
   _in.close();
   _in.clear();
   _in.open( anchorFile.c_str() );
   _buffer.clear();
   _readDocumentHeader();
 }
Esempio n. 2
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  void _mergeData() {
    // fill in tags from the document vector fields
    // unnecessary to filter out any fields to remove, as they will
    // be ignored when indexing.
    indri::utility::greedy_vector<indri::index::FieldExtent>& fields = _docIter->currentEntry()->fields() ;
    tl.clear();
    for (size_t i = 0; i < fields.size(); i++) {
      const indri::index::FieldExtent& field = fields[i];
      std::string fieldName = _index->field(fields[i].id);;
    
      tl.addTag(fieldName.c_str(), fieldName.c_str(), field.begin);
      tl.endTag(fieldName.c_str(), fieldName.c_str(), field.end);
    }
    //stuff it into the parsed doc
    tl.writeTagList(parsed->tags);

    // fill in terms from the document text so that they will stop/stem
    // correctly when added to the new repository.
    // Potentially issues with url injection here...
    // probably best not to do this with trecweb/html docs....
    // TODO: test this
    termBuffer.clear();
    termBuffer.grow( parsed->textLength * 2 );

    for (size_t i = 0; i < parsed->positions.size(); i++ ) {
      int start = parsed->positions[i].begin;
      int end = parsed->positions[i].end;
      int token_len = end - start;
      const char *token = parsed->text + start;
      char* write_loc = termBuffer.write( token_len + 1 );
      strncpy( write_loc, token, token_len );
      write_loc[token_len] = '\0';
      parsed->terms.push_back( write_loc );
    }
  }
Esempio n. 3
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void IndexWriter::_writeBatch( indri::file::SequentialWriteBuffer* buffer, int document, int length, indri::utility::Buffer& data ) {
  assert( length < 100*1000*1000 );
  _writeSkip( buffer, document, length );
  if( data.position() != 0 ) {
    buffer->write( data.front(), data.position() );
    data.clear();
  }
}
Esempio n. 4
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      indri::api::ParsedDocument* transform( indri::api::ParsedDocument* document ) {
        // find the url metadata pair
        indri::utility::greedy_vector<indri::parse::MetadataPair>::iterator iter;
       
        iter = std::find_if( document->metadata.begin(),
                             document->metadata.end(),
                             indri::parse::MetadataPair::key_equal( "url" ) );   
       
        // no need to stick around if there is no url                     
        if( iter == document->metadata.end() )
          return document;                          
        
        // need to copy this into the buffer and parse it:
        _buffer.clear();                                   
        _buffer.grow( iter->valueLength + 1 );
        char* urlText = _buffer.write( iter->valueLength );                  
	// pushes the buffer pointer, trash in urlText
	//        memcpy( _buffer.write( iter->valueLength ), iter->value, iter->valueLength );
        memcpy( urlText, iter->value, iter->valueLength );
        *_buffer.write(1) = '\0';
        
        // now we're pointing to the copied urlText, so we can start parsing
        int urlStart = (int)document->terms.size();
        char* c = urlText;    
        bool lastSkipped = true; 
        bool foundSlash = false;
        int remainingStart = -1;
        
        // skip the beginning stuff (http://)
        for( c = urlText; *c; c++ ) {
          if( *c == '/' && c[1] && c[1] == '/' ) {
            urlText = c + 2;                            
          }
        }
        int cnt = 0;
        
        // now, try to find the 
        for( c = urlText; *c; c++ ) {
          if( (*c >= 'A' && *c <= 'Z') ||
              (*c >= 'a' && *c <= 'z') ||
              (*c >= '0' && *c <= '9') ) 
          {
            if( lastSkipped ) {
	      lastSkipped = false;
              document->terms.push_back( c );
              cnt++;
            }
          } else if( *c == '/' && remainingStart < 0 ) {
            *c = 0;
	    lastSkipped = true;
            remainingStart = document->terms.size();
          } else {
	    lastSkipped = true;
            *c = 0;
          }            
        }

        // put in phony positions entries
        int tokEnd = document->positions.size() ? document->positions[document->positions.size()-1].end : 0;
        for (size_t n = document->terms.size()-cnt; n < document->terms.size(); n++) {
          TermExtent extent;
          extent.begin = tokEnd++; // hope this doesn't run off the end
          extent.end = tokEnd;
          document->positions.push_back( extent );
        }

        // the URL text is now parsed and stored in the document
        // all we need to do now is put some tags around the text.
        TagExtent *url = new TagExtent;
        url->begin = urlStart;
        url->end = document->terms.size();
        url->name = "url";
        url->number = 0;
        document->tags.push_back(url);
                        
        TagExtent *domain = new TagExtent;
        domain->begin = urlStart;
        domain->end = (remainingStart >= 0) ? remainingStart : document->terms.size();
        domain->name = "urldomain";      
        domain->number = 0;
        document->tags.push_back(domain);
        
        if( remainingStart > 0 ) {
          indri::parse::TagExtent *urlpath = new TagExtent;
          urlpath->begin = remainingStart;
          urlpath->end = document->terms.size();
          urlpath->name = "urlpath";
          urlpath->number = 0;
          document->tags.push_back(urlpath);
        }
  
        return document;
      }
      void _fetchText( indri::utility::greedy_vector<TagExtent *>& tags, indri::utility::greedy_vector<char*>& terms ) {
        // now, fetch the additional terms
        char line[65536];
        _buffer.clear();

        for( int i=0; i<_count; i++ ) {
          // LINK
          _in.getline( line, sizeof line-1 );

          // LINKDOCNO 
          _in.getline( line, sizeof line-1 );
          
          // TEXT=
          _in.getline( line, sizeof line-1 );
          int textLen = strlen(line+6);
          strcpy( _buffer.write(textLen+1), line+6 );
          _buffer.unwrite(1);
          
          assert( *(_buffer.front()+_buffer.position()-1) == '\"' && "Last character should be a quote" );
        }
        *(_buffer.write(1)) = 0;

        // now there's a bunch of text in _buffer, space separated, with each
        // link separated by a " symbol

        char* beginWord = 0;
        int beginIndex = 0;
        char* buffer = _buffer.front();

        for( unsigned int i=0; i<_buffer.position(); i++ ) {
          if( isalnum(buffer[i]) && !beginWord ) {
            beginWord = buffer+i;

            if(!beginIndex)
              beginIndex = terms.size();
          } else if( isspace(buffer[i]) ) {
            buffer[i] = 0;
            if( beginWord )
              terms.push_back( beginWord );
            beginWord = 0;
          } else if( buffer[i] == '\"' ) {
            buffer[i] = 0;
            if( beginWord )
              terms.push_back( beginWord );
            beginWord = 0;
        
            TagExtent * extent = new TagExtent;
            extent->name = "inlink";
            extent->begin = beginIndex;
            extent->end = terms.size();
            extent->number = 0;
            extent->parent = 0;

            assert( extent->begin <= extent->end );

            if( beginIndex ) {
              tags.push_back(extent);
              if( terms.size() > 125000 )
                break;
            }


            beginIndex = 0;
          }

        }

      }