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();
}
}
bool lemur::file::SortMergeTextFiles::_readLine(FILE *_in, char*& beginLine, size_t& lineLength, indri::utility::Buffer &_buffer ) {
lineLength = 0;
size_t actual;
// make a buffer of a reasonable size so we're not always allocating
if( _buffer.size() < 1024*1024 )
_buffer.grow( 1024*1024 );
// if we're running out of room, add 25MB
if( (_buffer.size() - _buffer.position()) < 512*1024 ) {
_buffer.grow( _buffer.size() + 1024*1024*25 );
}
if( _buffer.position() ) {
// get rid of null terminator from previous call
_buffer.unwrite(1);
}
size_t readAmount = _buffer.size() - _buffer.position() - 2;
// fetch next document line
char* buffer = _buffer.write( readAmount );
char* result = fgets( buffer, (int)readAmount, _in );
if(!result) {
return false;
}
actual = strlen(buffer);
lineLength += actual;
_buffer.unwrite( readAmount - actual );
// all finished reading
*_buffer.write(1) = 0;
beginLine = _buffer.front() + _buffer.position() - lineLength - 1;
// strip the \n off the end
if (beginLine[lineLength-1]=='\n') {
beginLine[lineLength-1]=0;
}
return true;
}
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;
}
}
}