Read compressed files without unzipping them

I have (very large) comma separated files compressed in bz2 format. If I un-compressed them and I read with

    fileID = fopen('file.dat');
    X = textscan(fileID,'%d %d64 %s %f %d %f %f %d', 'delimiter', ',');
    fclose(fileID);

everything is fine. But I would like to read them without uncompressing them, something like

    fileID = fopen('file.bz2');
    X = textscan(fileID,'%d %d64 %s %f %d %f %f %d', 'delimiter', ',');
    fclose(fileID);

which, unfortunatley, returns an empty X. Any suggestions? Do I have to uncompressed them unavoidably?