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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/ImmortableNumberSearch.java
0,0 → 1,370
package de.viathinksoft.immortable.genX;
 
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.math.BigInteger;
 
/**
* Immortable Iterator
*
* @author Daniel Marschall, Big thanks to the users of MatheBoard.de
* @see http://www.matheboard.de/archive/435725/thread.html
*/
public class ImmortableNumberSearch {
 
private static final String SIGNATURE = "Immortable Number Report File Version 2.01";
private static final String SIGNATURE_MINOR = "Iterator GenX Java (100k save-interval, load-integrity-check, int32-r, array-object) r29";
private static final String END_SIG = "END OF REPORT";
private static final int SOFTBREAK = 76;
 
private ByteArray a;
private String filename;
private int saveInterval = 100000;
private int u = -1;
private int r = -1; // FUTURE: r als BigInteger
private String creation_time;
private String backupDir = "backup";
 
private static final int INITIAL_SIZE = 1000000;
private static final int EXPANSION_SIZE = 1000000;
 
private boolean do_integrity_test = false;
private boolean verbose = false;
 
public boolean isDo_integrity_test() {
return do_integrity_test;
}
 
public void setDo_integrity_test(boolean doIntegrityTest) {
do_integrity_test = doIntegrityTest;
}
 
public boolean isVerbose() {
return verbose;
}
 
public void setVerbose(boolean verbose) {
this.verbose = verbose;
}
 
protected void log(String s) {
if (verbose) {
String timestamp = DateUtils.now("EEE, d MMM yyyy HH:mm:ss Z");
System.out.println(timestamp + " - " + s); // FURUE: In eine
// Log-Datei schreiben
}
}
 
public ImmortableNumberSearch(String filename) throws LoadException {
this.filename = filename;
load();
}
 
public String getBackupDir() {
return backupDir;
}
 
public void setBackupDir(String backupDir) {
this.backupDir = backupDir;
}
 
public int getSaveInterval() {
return this.saveInterval;
}
 
public ByteArray getA() {
return a;
}
 
public int getU() {
return u;
}
 
public int getR() {
return r;
}
 
public String getFilename() {
return filename;
}
 
public void setSaveInterval(int saveInterval) {
this.saveInterval = saveInterval;
}
 
private boolean savePointExists() {
return new File(filename).exists();
}
 
private void load() throws LoadException {
if (!savePointExists()) {
this.a = new ByteArray(INITIAL_SIZE, EXPANSION_SIZE);
return;
}
 
BufferedReader f;
try {
f = new BufferedReader(new FileReader(filename));
} catch (FileNotFoundException e) {
// Will not happen because of savePointExists().
return;
}
 
u = -1;
r = -1;
 
try {
try {
String s = f.readLine();
if (!s.equals(SIGNATURE)) {
throw new LoadException("Corrupt: Wrong signature");
}
 
f.readLine(); // Minor. signature
f.readLine(); // ""
 
f.readLine(); // "(Starting time)"
creation_time = f.readLine();
f.readLine(); // ""
 
f.readLine(); // "(Save timestamp)"
f.readLine(); // Timestamp
f.readLine(); // ""
 
f.readLine(); // "(Digits)"
s = f.readLine();
u = Integer.parseInt(s) - 1;
f.readLine(); // ""
 
f.readLine(); // "(r)"
s = f.readLine();
r = Integer.parseInt(s); // FUTURE: (1) Multi-Line-Support?
f.readLine(); // ""
 
this.a = new ByteArray(u + 1 + EXPANSION_SIZE, EXPANSION_SIZE);
 
f.readLine(); // "(M5 reversed)"
do {
s = f.readLine();
for (int i = 0; i < s.length(); i++) {
a.add(Byte.parseByte(s.substring(i, i + 1)));
}
} while (!s.equals(""));
 
if (u + 1 != a.count()) {
throw new LoadException(
"Corrupt: Formal and actual length mismatch!");
}
 
s = f.readLine();
if (!s.equals(END_SIG)) {
throw new LoadException("Corrupt: End-signature mismatch.");
}
} finally {
f.close();
}
} catch (IOException e) {
throw new LoadException(e);
}
}
 
private void save(boolean integrityTest) throws SaveException {
if ((integrityTest) && (do_integrity_test)) {
log("Beginne Selbsttest vor erster Speicherung...");
 
if (!integryTest()) {
throw new SaveException(
"Integrity test failed. (Loaded file broken?) Will not save.");
}
}
 
log("Speichere bei u=" + (u + 1));
 
String timestamp = DateUtils.now("EEE, d MMM yyyy HH:mm:ss Z");
String timestamp_filename = DateUtils.now("dd-MM-yyyy_HH-mm-ss");
 
try {
BufferedWriter f = new BufferedWriter(new FileWriter(filename));
 
try {
f.write(SIGNATURE + "\r\n");
 
f.write(SIGNATURE_MINOR + "\r\n");
f.write("\r\n");
 
f.write("(Starting time)\r\n");
f.write(creation_time + "\r\n");
f.write("\r\n");
 
f.write("(Save timestamp)\r\n");
f.write(timestamp + "\r\n");
f.write("\r\n");
 
f.write("(Digits)\r\n");
f.write((u + 1) + "\r\n");
f.write("\r\n");
 
f.write("(r)\r\n");
f.write(r + "\r\n"); // FUTURE: (1) Multi-Line-Support?
f.write("\r\n");
 
f.write("(M5 reversed)\r\n");
int i;
for (i = 0; i < a.count(); i++) {
byte xa = a.get(i);
f.write("" + xa);
if ((i + 1) % SOFTBREAK == 0) {
f.write("\r\n");
}
}
if ((i + 1) % SOFTBREAK != 0) {
f.write("\r\n");
}
f.write("\r\n");
 
f.write(END_SIG);
} finally {
f.close();
}
} catch (IOException e) {
throw new SaveException("Could not save master file.", e);
}
 
// Make backup
 
new File(backupDir).mkdir();
String bak_filename = backupDir + "/immortal_" + timestamp_filename
+ "_" + (u + 1) + ".txt";
try {
FileUtils.copyFile(new File(filename), new File(bak_filename));
} catch (IOException e) {
throw new SaveException("Could not make backup", e);
}
 
if ((integrityTest) && (do_integrity_test)) {
log("Erste Speicherung absolviert. Stabile Phase hat begonnen.");
}
}
 
public void calcIterate(int amount) throws SaveException {
log("Beginn der Rechenarbeit...");
 
int cnt = 0;
 
// Wir führen beim ersten Speichern einen weiteren
// integrity-Test durch. Grund: Wäre bei einer Fortsetzung einer
// Datei das "r" falsch (der Datenteil aber korrekt), dann würde
// diese Datei beim Speichern ungültige Daten enthalten (Zahl
// nicht immortabel).
boolean firstSave = true;
 
if (a.isEmpty()) {
creation_time = DateUtils.now("EEE, d MMM yyyy HH:mm:ss Z");
a.add((byte) 5);
a.add((byte) 2);
u = 1;
r = 2;
cnt += 2;
}
 
int s, m, k;
 
do {
r = (r /* - a.get(u) */) / 10 + a.get(u);
s = 0;
for (m = 1, k = u; m < k; m++, k--) {
s += a.get(m) * a.get(k);
}
r += 2 * s;
if (m == k) {
r += a.get(m) * a.get(m);
}
u++;
a.add((byte) (r % 10));
 
cnt++;
if (cnt % saveInterval == 0) {
save(firstSave);
firstSave = false;
}
} while (cnt != amount);
 
// Wir brauchen nicht zwei Mal zu speichern
if (cnt - 1 % saveInterval != 0) {
log("Letzte Speicherung vor Ende...");
save(firstSave);
// firstSave = false;
}
 
log("Ende der Rechenarbeit...");
}
 
public byte getDigitReverse(int u) {
return a.get(u);
}
 
public StringBuilder M5_StringBuilder(int u) {
StringBuilder s = new StringBuilder();
for (int i = 0; i < a.count(); i++) {
byte xa = a.get(i);
s.append("" + xa);
}
s.reverse();
return s;
}
 
public String M5_String(int u) {
return M5_StringBuilder(u).toString();
}
 
public BigInteger M5_BigInteger(int u) {
return new BigInteger(M5_String(u));
}
 
public StringBuilder M6_StringBuilder(int u) {
StringBuilder s = new StringBuilder();
for (int i = 0; i < a.count(); i++) {
byte xa = a.get(i);
if (i > 0) {
s.append("" + (9 - xa));
} else {
s.append("" + (11 - xa));
}
}
s.reverse();
return s;
}
 
public String M6_String(int u) {
return M6_StringBuilder(u).toString();
}
 
public BigInteger M6_BigInteger(int u) {
return new BigInteger(M6_String(u));
}
 
protected static boolean isImmortable(BigInteger num, int m) {
// Alternativ
// return num.pow(2).toString().endsWith(num.toString());
 
// n² === n (mod 10^m) <===> n²%10^m == n%10^m == n
 
BigInteger m_pow = BigInteger.TEN.pow(m);
return num.pow(2).mod(m_pow).equals(num);
}
 
protected static boolean isImmortable(BigInteger num) {
int m = num.toString().length();
return isImmortable(num, m);
}
 
public boolean integryTest() {
// return isImmortable(M5_BigInteger(u), a.count());
return isImmortable(M6_BigInteger(u), a.count());
}
}
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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/DateUtils.java
0,0 → 1,20
package de.viathinksoft.immortable.genX;
 
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;
 
/**
* @see http://www.rgagnon.com/javadetails/java-0106.html (modified)
*/
public class DateUtils {
public static String now(String format) {
Calendar cal = Calendar.getInstance();
Locale lok = Locale.ENGLISH;
SimpleDateFormat sdf = new SimpleDateFormat(format, lok);
return sdf.format(cal.getTime());
}
 
private DateUtils() {
}
}
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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/ByteArray.java
0,0 → 1,74
package de.viathinksoft.immortable.genX;
 
/**
*
* @author Daniel Marschall
*
*/
public class ByteArray {
 
private int expansionSize;
private byte[] a;
private int top = -1;
 
public ByteArray() {
this(100, 1000);
}
 
public ByteArray(int initialSize, int expansionSize) {
this.a = new byte[initialSize];
this.expansionSize = expansionSize;
}
 
private void expand() {
byte[] b = a;
 
a = new byte[b.length + expansionSize];
 
for (int i = 0; i < b.length; i++) {
a[i] = b[i];
}
}
 
public void add(byte x) {
top++;
if (top >= a.length) {
expand();
}
a[top] = x;
}
 
public byte remove() {
return a[top--];
}
 
public byte get(int i) {
return a[i];
}
 
public void set(int i, byte x) {
a[i] = x;
}
 
public int count() {
return top + 1;
}
 
public void clear() {
top = -1;
}
 
public boolean isEmpty() {
return top == -1;
}
 
@Override
public String toString() {
StringBuilder x = new StringBuilder();
for (int i = 0; i <= top; i++) {
x.append("" + a[i]);
}
return x.toString();
}
 
}
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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/MainUnit.java
0,0 → 1,11
package de.viathinksoft.immortable.genX;
 
public class MainUnit {
 
public static void main(String[] args) throws ImmortableException {
ImmortableNumberSearch x = new ImmortableNumberSearch("data.txt");
x.calcIterate(-1);
// x.calcIterate(10);
}
 
}
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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/FileUtils.java
0,0 → 1,30
package de.viathinksoft.immortable.genX;
 
import java.io.*;
import java.nio.channels.*;
 
/**
*
* @see http://www.rgagnon.com/javadetails/java-0064.html
*
*/
public class FileUtils {
public static void copyFile(File in, File out) throws IOException {
FileChannel inChannel = new FileInputStream(in).getChannel();
FileChannel outChannel = new FileOutputStream(out).getChannel();
try {
inChannel.transferTo(0, inChannel.size(), outChannel);
} catch (IOException e) {
throw e;
} finally {
if (inChannel != null)
inChannel.close();
if (outChannel != null)
outChannel.close();
}
}
 
public static void main(String args[]) throws IOException {
FileUtils.copyFile(new File(args[0]), new File(args[1]));
}
}
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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/ImmortableException.java
0,0 → 1,23
package de.viathinksoft.immortable.genX;
 
public class ImmortableException extends Exception {
 
private static final long serialVersionUID = -2350754871091479027L;
public ImmortableException() {
super();
}
 
public ImmortableException(Throwable cause) {
super(cause);
}
 
public ImmortableException(String message) {
super(message);
}
 
public ImmortableException(String message, Throwable cause) {
super(message, cause);
}
 
}
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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/SaveException.java
0,0 → 1,23
package de.viathinksoft.immortable.genX;
 
public class SaveException extends ImmortableException {
 
private static final long serialVersionUID = 6676069625825930604L;
 
public SaveException() {
super();
}
 
public SaveException(Throwable cause) {
super(cause);
}
 
public SaveException(String message) {
super(message);
}
 
public SaveException(String message, Throwable cause) {
super(message, cause);
}
 
}
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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/LoadException.java
0,0 → 1,23
package de.viathinksoft.immortable.genX;
 
public class LoadException extends ImmortableException {
 
private static final long serialVersionUID = 5556229109549989469L;
 
public LoadException() {
super();
}
 
public LoadException(Throwable cause) {
super(cause);
}
 
public LoadException(String message) {
super(message);
}
 
public LoadException(String message, Throwable cause) {
super(message, cause);
}
 
}
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/ViaThinkSoft Distributed/src/de/viathinksoft/immortable/genX/original.txt
0,0 → 1,23
/* Berechnet a[0]..a[n-1], also bis einschliesslich M_5(n) . */
/* Es wird vorausgesetzt, dass das Feld a auf einen genuegend grossen Platz fuer n Bytes zeigt! */
void BerechneUnsterblich (unsigned char *a, int n)
{
int r,s,u,m,k;
if (n <= 0) return;
a[0] = 5;
if (n <= 1) return;
a[1] = 2;
r = 2;
u = 1;
while (u < n-1)
{
r = (r-a[u])/10 + a[u];
s = 0;
for (m = 1, k = u; m < k; m++,k--) s += a[m]*a[k];
r += 2*s;
if (m == k) r += a[m]*a[m];
a[++u] = r % 10;
}
}
 
"5 Mal editiert"
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