public static void main(String[] args) {
/*System.out.println(modular_exponent_32(2,36,37));
System.out.println(modular_exponent_32(2,18,37));
System.out.println(modular_exponent_32(2,9,37));
int d = Integer.numberOfTrailingZeros(64);
System.out.println(d);
*/
int counter = how_many_primes(1000000);
System.out.println(counter);
try {
RandomAccessFile out = new RandomAccessFile("mrprimes.txt", "rw");
out.writeBytes("2\n");
for (int i = 3; i < 1000000; i += 2) {
if (miller_rabin_32(i)) {
out.writeBytes(Integer.toString(i) + "\n");
}
}
// for (int i=0; i<counter; i++){
// out.seek(i*4);
// System.out.println(","+out.readInt());
// }
out.close();
} catch (IOException e) {
}
System.out.println(miller_rabin_32(1105));
}
/**
* Record a specific string
*
* @param s
*/
public static void record(String s) {
try {
if (!recording) return;
Date now = new Date();
String ts = stamp.format(now);
R.writeBytes(ts);
R.writeBytes(" ");
R.writeBytes(s);
R.writeBytes("\n");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Add the given text string to the end of a given file.
*
* @param inStr The string to be added.
* @param fileStr the name of the file to be added.
*/
public static void addStringToFile(String inStr, String fileStr) throws Exception {
RandomAccessFile raFile = new RandomAccessFile(fileStr, "rw");
raFile.seek(raFile.length());
raFile.writeBytes(inStr);
raFile.close();
}
/**
* Create an index file for the specified column.
*
* @param colname the column's name
* @return the time it took to run this method.
* @throws Exception
*/
public long createIndexFile() throws Exception {
long s = System.currentTimeMillis();
// fill idx file with hashsize empty records/lines (empty means filled with spaces)
int pkindex = def.getColPosition(def.getPK());
if (pkindex == -1) {
throw new Exception("Primary key does not exist");
}
Integer[] size = def.getSizes();
int recordSize = idxFixedRecordLength() + size[pkindex];
StringBuffer temp = new StringBuffer();
for (int i = 0; i < recordSize - 2; i++) {
temp.append(" ");
}
indexFile.seek(0);
for (int i = 0; i < this.hashsize; i++) {
indexFile.writeBytes(temp + "\r\n");
}
int table_pos = 0;
// create an index entry for each row present in the tbl-file (for column=colname)
String line = null;
tableFile.seek(0);
while ((line = tableFile.readLine()) != null) {
// get column value (don't strip the spaces)
String pkvalue = line.split("#")[pkindex];
addIndexEntry(table_pos, pkvalue);
table_pos++;
}
long e = System.currentTimeMillis();
return e - s;
}
public void write(String s) {
try {
seek(index * BLOCKSIZE);
super.writeBytes(s);
} catch (IOException ie) {
}
index++;
}
void doExeCommand() {
JViewport viewport = scrollPane.getViewport();
String strContent = new String();
PSlider slider;
int i;
File fp = new File(dataFile);
RandomAccessFile access = null;
Runtime program = Runtime.getRuntime();
String cmdTrigger = "trigger";
boolean delete = fp.delete();
try {
fp.createNewFile();
} catch (IOException ie) {
System.err.println("Couldn't create the new file " + ie);
// System.exit(-1);;
}
try {
access = new RandomAccessFile(fp, "rw");
} catch (IOException ie) {
System.err.println("Error in accessing the file " + ie);
// System.exit(-1);;
}
for (i = 0; i < COMPONENTS; i++) {
slider = (PSlider) vSlider.elementAt(i);
/* Modified on March 20th to satisfy advisors' new request */
if (slider.isString == true) strContent = strContent + slider.getRealStringValue() + " ";
else strContent = strContent + slider.getValue() + " ";
}
// Get value of the radio button group
if (firstBox.isSelected() == true) strContent = strContent + "1";
else strContent = strContent + "0";
try {
access.writeBytes(strContent);
access.close();
} catch (IOException ie) {
System.err.println("Error in writing to file " + ie);
// System.exit(-1);;
}
// Trigger the OpenGL program to update with new values
try {
Process pid = program.exec(cmdTrigger);
} catch (IOException ie) {
System.err.println("Couldn't run " + ie);
// System.exit(-1);;
}
doSourceFileUpdate();
}
/**
* Create an index entry in the idx file of the specified column.
*
* @param tablePosition position or line nr in table *.tbl
* @param pkValue the value of the primary key to create an index entry for
* @throws Exception
*/
protected void addIndexEntry(int tablePosition, String pkValue) throws Exception {
if (!indexExists(def.getPK())) {
throw new Exception("No index created");
}
int pkindex = def.getColPosition(def.getPK());
if (pkindex == -1) {
throw new Exception("Primary key does not exist");
}
Integer[] size = def.getSizes();
if (pkValue.length() > TableDefinition.INTEGER_SIZE) {
throw new Exception("Supplied pkValue too large");
} else {
// make sure key value has appropriate length
StringBuffer temp = new StringBuffer();
temp.append(pkValue);
for (int i = 0; i < TableDefinition.INTEGER_SIZE - pkValue.length(); i++) {
temp.append(' ');
}
pkValue = temp.toString();
}
// calculate index = hash value
String s_value = pkValue.trim();
int indexPosition = hash(s_value);
int recordSize = idxFixedRecordLength() + size[pkindex];
indexFile.seek(indexPosition * recordSize);
String line = indexFile.readLine();
if (line.substring(0, 1).equals(" ")) {
// empty record, reset file pointer and fill record
indexFile.seek(indexPosition * recordSize);
String indexPositionFormatted = String.format("%-5s", Integer.toString(indexPosition));
String tablePositionFormatted = String.format("%-5s", Integer.toString(tablePosition));
String indexRecord =
indexPositionFormatted
+ "# #"
+ pkValue
+ "#"
+ tablePositionFormatted
+ "#"
+ "null "
+ "\r\n";
indexFile.writeBytes(indexRecord);
} else {
String[] parts = line.split("#");
if (parts[1].equals("D")) {
// Deleted record, reset file pointer, fill record but keep previous link !
indexFile.seek(indexPosition * recordSize);
String indexPositionFormatted = String.format("%-5s", Integer.toString(indexPosition));
String tablePositionFormatted = String.format("%-5s", Integer.toString(tablePosition));
String indexRecord =
indexPositionFormatted + "# #" + pkValue + "#" + tablePositionFormatted;
indexFile.writeBytes(indexRecord);
} else {
// Collision found ! a valid record is found, so add new record at EOF
// Calculate new record number
int newIndexPosition = (int) (indexFile.length() / recordSize);
String newIndexPositionFormatted =
String.format("%-5s", Integer.toString(newIndexPosition));
String tablePositionFormatted = String.format("%-5s", Integer.toString(tablePosition));
// reset file pointer and update the current record
indexFile.seek((indexPosition * recordSize) + (recordSize - 2 - 5));
indexFile.write(newIndexPositionFormatted.toString().getBytes());
// move file pointer to EOF and append new record
indexFile.seek(indexFile.length());
String indexRecord =
newIndexPositionFormatted
+ "# #"
+ pkValue
+ "#"
+ tablePositionFormatted
+ "#"
+ "null "
+ "\r\n";
indexFile.writeBytes(indexRecord);
}
}
}
void doSourceFileUpdate() {
BufferedReader bufferIn = null;
String str1 = new String();
String strContent = new String();
String sliderValue = new String();
String newLine = System.getProperty("line.separator");
StringBuffer strBuf = new StringBuffer();
RandomAccessFile access = null;
String tempFile = "temp" + round + ".html";
File fp = new File(tempFile);
boolean firstChoice = true;
int posFound = 0;
int i = 0;
PSlider slider;
// round += 1;
// Read the original source file to input buffer
try {
bufferIn = new BufferedReader(new FileReader(exampleSource));
} catch (FileNotFoundException fe) {
System.err.println("Example Source File not found " + fe);
// System.exit(-1);;
}
// get the first line of the buffer.
try {
str1 = bufferIn.readLine();
} catch (IOException ie) {
System.err.println("Error reading line from the buffer " + ie);
// System.exit(-1);;
}
// Transfer the whole content of the input buffer to the string
try {
do strContent += str1 + newLine;
while ((str1 = bufferIn.readLine()) != null);
} catch (IOException ie) {
System.err.println("Error readding content of the input buffer " + ie);
// System.exit(-1);;
}
// do the replacement.
// First having to update the code part that is active in this section before
// doing variables updated. Look at the current active radiobutton to make decision
if (secondBox.isSelected() == true) firstChoice = false;
if (firstChoice == true) {
String tempStr = new String();
strBuf = new StringBuffer(strContent);
posFound = strContent.indexOf(textStr2);
tempStr =
"<font color=blue>/***********" + newLine + textStr2 + newLine + "***********/</font>";
strBuf.replace(posFound, posFound + textStr2.length(), tempStr);
strContent = new String(strBuf);
} else {
String tempStr = new String();
strBuf = new StringBuffer(strContent);
posFound = strContent.indexOf(textStr1);
tempStr =
"<font color=blue>/***********" + newLine + textStr1 + newLine + "***********/</font>";
strBuf.replace(posFound, posFound + textStr1.length(), tempStr);
strContent = new String(strBuf);
}
for (i = COMPONENTS; i > 0; i--) {
// get the current value of slider
slider = (PSlider) vSlider.elementAt(i - 1);
sliderValue = slider.getValue();
// construct the search string
str1 = "JPOT$" + i;
// get the position of the search string in the content string.
while ((posFound = strContent.indexOf(str1)) != -1) {
strBuf = new StringBuffer(strContent);
strBuf.replace(posFound, posFound + str1.length(), sliderValue);
strContent = new String(strBuf);
}
}
boolean delete = fp.delete();
try {
fp.createNewFile();
} catch (IOException ie) {
System.err.println("Couldn't create the new file " + ie);
// System.exit(-1);;
}
try {
access = new RandomAccessFile(fp, "rw");
} catch (IOException ie) {
System.err.println("Error in accessing the file " + ie);
// System.exit(-1);;
}
try {
access.writeBytes(strContent);
access.close();
} catch (IOException ie) {
System.err.println("Error in writing to file " + ie);
// System.exit(-1);;
}
try {
textPane.getDocument().putProperty(Document.StreamDescriptionProperty, null);
URL url = new URL("file:" + tempFile + "#gohere");
textPane.setPage(url);
delete = fp.delete();
} catch (IOException ie) {
System.err.println("Can not get the example html file " + ie);
// System.exit(-1);;
}
}