has init initSeq initSeq read readAllNames readBufferRowCount readColumnCount readIndex readIndices readInfo readName readRowCount readSegment readSegmentSeq readSegmentSeq readSegmentSeqTo readSegmentSeqTo readSegmentSeqTo readSegmentSeqTo readSegmentTo readSegmentTo readSeq readSeq readSeqTo readSeqTo readSeqTo readSeqTo readTo readTo remove removeSeq rename write writeSegment writeSegmentSeq writeSegmentSeq writeSeq writeSeq

readBufferRowCount() long readBufferRowCount ( ) const Get the number of rows in the internal buffer. CFITSIO internally implements a buffer to read and write data units efficiently. To optimize its usage, columns should be read and written by chunks of the buffer size at most.