// File: example6.java       I. Henry    February 18 2005
//
// Java translation of example6.c from the WFDB Programmer's Guide
//
// Copyright (C) 2005 Isaac C. Henry (ihenry@physionet.org)

import java.io.*;
import wfdb.*;

public class example6 {

    public static void main(String argv[]) {
	int i, nsig, nsamp = 1000;

	if (argv.length < 1) {
	    System.out.println("usage: example6 record");
	    // Unlike C programs, Java programs do not have any foolproof way
	    // to discover their own names, so the name is given as a constant
	    // above.  The usage statement is correct if this file has been
	    // compiled.  The command needed to run this program within a JVM
	    // is platform-dependent and likely to be more complex.
	    System.exit(1);
	}
	if ((nsig = wfdb.isigopen(argv[0], null, 0)) <= 0) System.exit(2);
	WFDB_SiginfoArray s = new WFDB_SiginfoArray(nsig);
	WFDB_SampleArray vin = new WFDB_SampleArray(nsig);
	WFDB_SampleArray vout = new WFDB_SampleArray(nsig);
	if (wfdb.isigopen(argv[0], s.cast(), nsig) != nsig) System.exit(2);
	if (wfdb.osigopen("8l", s.cast(), nsig) <= 0) System.exit(3);
	while (nsamp-- > 0 && wfdb.getvec(vin.cast()) > 0) {
	    for (i = 0; i < nsig; i++) {
		vout.setitem(i, vout.getitem(i) - vin.getitem(i));
	    }
	    if (wfdb.putvec(vout.cast()) < 0) break;
	    for (i = 0; i < nsig; i++) {
		vout.setitem(i, vin.getitem(i));
	    }
	}
	wfdb.newheader("dif");
	wfdb.wfdbquit();
    }
}