import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import java.util.function.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import javax.imageio.*;
import java.math.*;
import static x30_pkg.x30_util.DynamicObject;
import java.awt.geom.*;
class main {
static void test_BresenhamLineDrawer() {
assertEqualsVerbose(llPts(1, 1, 2, 1, 3, 1, 4, 2, 5, 2, 6, 2),
asList(enableScaffolding(new BresenhamLineDrawer(1, 1, 6, 2))));
assertEqualsVerbose(llPts(1, 3, 2, 3, 3, 3, 4, 2, 5, 2, 6, 2),
asList(enableScaffolding(new BresenhamLineDrawer(1, 3, 6, 2))));
assertEqualsVerbose(llPts(10, 10, 10, 9),
asList(enableScaffolding(new BresenhamLineDrawer(10, 10, 10, 9))));
}
static A assertEqualsVerbose(Object x, A y) {
assertEqualsVerbose((String) null, x, y);
return y;
}
// x = expected, y = actual
static A assertEqualsVerbose(String msg, Object x, A y) {
if (!eq(x, y)) {
throw fail((nempty(msg) ? msg + ": " : "") + "expected: "+ x + ", got: " + y);
} else
print("OK" + (empty(msg) ? "" : " " + msg) + ": " + /*sfu*/(x));
return y;
}
static PtBuffer llPts(int... coordinates) {
return litpts(coordinates);
}
// unclear semantics as to whether return null on null
static ArrayList asList(A[] a) {
return a == null ? new ArrayList() : new ArrayList(Arrays.asList(a));
}
static ArrayList asList(int[] a) {
if (a == null) return null;
ArrayList l = emptyList(a.length);
for (int i : a) l.add(i);
return l;
}
static ArrayList asList(long[] a) {
if (a == null) return null;
ArrayList l = emptyList(a.length);
for (long i : a) l.add(i);
return l;
}
static ArrayList asList(float[] a) {
if (a == null) return null;
ArrayList l = emptyList(a.length);
for (float i : a) l.add(i);
return l;
}
static ArrayList asList(double[] a) {
if (a == null) return null;
ArrayList l = emptyList(a.length);
for (double i : a) l.add(i);
return l;
}
static ArrayList asList(short[] a) {
if (a == null) return null;
ArrayList l = emptyList(a.length);
for (short i : a) l.add(i);
return l;
}
static ArrayList asList(Iterator it) {
ArrayList l = new ArrayList();
if (it != null)
while (it.hasNext())
l.add(it.next());
return l;
}
// disambiguation
static ArrayList asList(IterableIterator s) {
return asList((Iterator) s);
}
static ArrayList asList(Iterable s) {
if (s instanceof ArrayList) return (ArrayList) s;
ArrayList l = new ArrayList();
if (s != null)
for (A a : s)
l.add(a);
return l;
}
static ArrayList asList(Enumeration e) {
ArrayList l = new ArrayList();
if (e != null)
while (e.hasMoreElements())
l.add(e.nextElement());
return l;
}
static List asList(Pair p) {
return p == null ? null : ll(p.a, p.b);
}
static A enableScaffolding(A o) {
if (o instanceof IMeta) ((IMeta) o).metaPut("scaffolding", true);
return o;
}
static boolean eq(Object a, Object b) {
return a == b || a != null && b != null && a.equals(b);
}
// a little kludge for stuff like eq(symbol, "$X")
static boolean eq(Symbol a, String b) {
return eq(str(a), b);
}
static RuntimeException fail() { throw new RuntimeException("fail"); }
static RuntimeException fail(Throwable e) { throw asRuntimeException(e); }
static RuntimeException fail(Object msg) { throw new RuntimeException(String.valueOf(msg)); }
static RuntimeException fail(Object... objects) { throw new Fail(objects); }
static RuntimeException fail(String msg) { throw new RuntimeException(msg == null ? "" : msg); }
static RuntimeException fail(String msg, Throwable innerException) { throw new RuntimeException(msg, innerException); }
static boolean nempty(Collection c) {
return !empty(c);
}
static boolean nempty(CharSequence s) {
return !empty(s);
}
static boolean nempty(Object[] o) { return !empty(o); }
static boolean nempty(byte[] o) { return !empty(o); }
static boolean nempty(int[] o) { return !empty(o); }
static boolean nempty(BitSet bs) { return !empty(bs); }
static boolean nempty(Map m) {
return !empty(m);
}
static boolean nempty(Iterator i) {
return i != null && i.hasNext();
}
static boolean nempty(MultiMap mm) { return mm != null && !mm.isEmpty(); }
static boolean nempty(Object o) { return !empty(o); }
static boolean nempty(LongBuffer b) { return b != null && !b.isEmpty(); }
static boolean nempty(Rect r) { return r != null && r.w != 0 && r.h != 0; }
static volatile StringBuffer local_log = new StringBuffer(); // not redirected
static boolean printAlsoToSystemOut = true;
static volatile Appendable print_log = local_log; // might be redirected, e.g. to main bot
// in bytes - will cut to half that
static volatile int print_log_max = 1024*1024;
static volatile int local_log_max = 100*1024;
static boolean print_silent = false; // total mute if set
static Object print_byThread_lock = new Object();
static volatile ThreadLocal