PROMS

On Sat, 26 Nov 2011 17:09:18 +0100 "nierveze" <nierveze at radio-astronomie.com> wrote: It would be helpfull to know the OS on which you have to do this. On somthing unixish I would write a piece of C, about: open( input); fstat( input, &stat); input_buf = mmap( input); close( input); open( out_put_even); lseek( output_even, stat.size / 2 - 1); write( output_even, "", 1); output_even_buf = mmap( output_even); close( output_even); open( out_put_odd); lseek( output_odd, stat.size / 2 - 1); write( output_,odd "", 1); output_odd_buf = mmap( output_odd); close( output_odd); for (size_t i = 0; i < stat.size; i += 2) { output_even_buf[i / 2] = input_buf[i]; output_odd_buf[i / 2] = input_buf[i + 1]; } munmap( output_even); munmap( output_odd); -- \end{Jochen} \ref{http://www.unixag-kl.fh-kl.de/~jkunz/}