Function UnwrapTile 

pub unsafe extern "C" fn UnwrapTile(
    infiles: *mut infileT,
    outfiles: *mut outfileT,
    params: *mut paramT,
    tileparams: *mut tileparamT,
    nlines: c_long,
    linelen: c_long,
) -> c_int

This is the main phase unwrapping function for a single tile.