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Added getHexDump.

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This commit is contained in:
Robert Greene 2003-12-11 05:35:09 +00:00
parent 7c2e60ea89
commit c8d49b4c56
1 changed files with 63 additions and 0 deletions
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63
src/com/webcodepro/applecommander/util/AppleUtil.java
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@ -21,6 +21,7 @@ package com.webcodepro.applecommander.util;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import java.util.GregorianCalendar;
@ -31,6 +32,17 @@ import java.util.GregorianCalendar;
* @author Rob Greene
*/
public class AppleUtil {
/**
* This is the number of bytes to display per line.
*/
private static final int BYTES_PER_LINE = 16;
/**
* This is the ASCII space character as used by the Apple ][.
* The high bit is off.
*/
private static final int APPLE_SPACE = 0x20;
/**
* Bit masks used for the bit shifting or testing operations.
*/
@ -502,4 +514,55 @@ public class AppleUtil {
(byte) ((result & byte5Mask) >> 24 & 0xff)
};
}
/**
* Generate a simple hex dump from the given byte array.
* <p>
* This is in the general form of:<br>
* MMMMMM: HH HH HH HH HH HH HH HH HH HH HH HH HH HH HH HH AAAAAAAA AAAAAAAA<br>
* Where MMMMMM = memory address, HH = hex byte, and
* A = ASCII character.
*/
public static String getHexDump(byte[] bytes) {
ByteArrayOutputStream output = new ByteArrayOutputStream();
PrintWriter printer = new PrintWriter(output);
printer.print(" Offset ");
printer.print("Hex Data ");
printer.println("Characters");
printer.print("======= ");
printer.print("================================================ ");
printer.println("=================");
for (int offset=0; offset<bytes.length; offset+= BYTES_PER_LINE) {
printer.print("$");
printer.print(AppleUtil.getFormatted3ByteAddress(offset));
printer.print(" ");
for (int b=0; b<BYTES_PER_LINE; b++) {
if (b == BYTES_PER_LINE / 2) printer.print(' ');
int index = offset+b;
printer.print( (index < bytes.length) ?
AppleUtil.getFormattedByte(bytes[index]) : "..");
printer.print(' ');
}
printer.print(' ');
for (int a=0; a<BYTES_PER_LINE; a++) {
if (a == BYTES_PER_LINE / 2) printer.print(' ');
int index = offset+a;
if (index < bytes.length) {
char ch = (char) (bytes[index] & 0x7f);
if ((byte)ch >= (byte)APPLE_SPACE) {
printer.print(ch);
} else {
printer.print('.');
}
} else {
printer.print(' ');
}
}
printer.println();
}
printer.println("** END **");
printer.flush();
printer.close();
return output.toString();
}
}