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/*
* Java Hexdump Library
*
* Copyright (c) Matthew Johnson 2005
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* To Contact the author, please email src@matthew.ath.cx
*
*/
package cx.ath.matthew.utils;
import java.io.PrintStream;
public class Hexdump
{
public static final char[] hexchars = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
public static String toHex(byte[] buf)
{
return toHex(buf, 0, buf.length);
}
public static String toHex(byte[] buf, int ofs, int len)
{
StringBuffer sb = new StringBuffer();
int j = ofs+len;
for (int i = ofs; i < j; i++) {
if (i < buf.length) {
sb.append(hexchars[(buf[i] & 0xF0) >> 4]);
sb.append(hexchars[buf[i] & 0x0F]);
sb.append(' ');
} else {
sb.append(' ');
sb.append(' ');
sb.append(' ');
}
}
return sb.toString();
}
public static String toAscii(byte[] buf)
{
return toAscii(buf, 0, buf.length);
}
public static String toAscii(byte[] buf, int ofs, int len)
{
StringBuffer sb = new StringBuffer();
int j = ofs+len;
for (int i = ofs; i < j ; i++) {
if (i < buf.length) {
if (20 <= buf[i] && 126 >= buf[i])
sb.append((char) buf[i]);
else
sb.append('.');
} else
sb.append(' ');
}
return sb.toString();
}
public static String format(byte[] buf)
{
return format(buf, 80);
}
public static String format(byte[] buf, int width)
{
int bs = (width - 8) / 4;
int i = 0;
StringBuffer sb = new StringBuffer();
do {
for (int j = 0; j < 6; j++) {
sb.append(hexchars[(i << (j*4) & 0xF00000) >> 20]);
}
sb.append('\t');
sb.append(toHex(buf, i, bs));
sb.append(' ');
sb.append(toAscii(buf, i, bs));
sb.append('\n');
i += bs;
} while (i < buf.length);
return sb.toString();
}
public static void print(byte[] buf)
{
print(buf, System.err);
}
public static void print(byte[] buf, int width)
{
print(buf, width, System.err);
}
public static void print(byte[] buf, int width, PrintStream out)
{
out.print(format(buf, width));
}
public static void print(byte[] buf, PrintStream out)
{
out.print(format(buf));
}
/**
* Returns a string which can be written to a Java source file as part
* of a static initializer for a byte array.
* Returns data in the format 0xAB, 0xCD, ....
* use like:
* javafile.print("byte[] data = {")
* javafile.print(Hexdump.toByteArray(data));
* javafile.println("};");
*/
public static String toByteArray(byte[] buf)
{
return toByteArray(buf, 0, buf.length);
}
/**
* Returns a string which can be written to a Java source file as part
* of a static initializer for a byte array.
* Returns data in the format 0xAB, 0xCD, ....
* use like:
* javafile.print("byte[] data = {")
* javafile.print(Hexdump.toByteArray(data));
* javafile.println("};");
*/
public static String toByteArray(byte[] buf, int ofs, int len)
{
StringBuffer sb = new StringBuffer();
for (int i = ofs; i < len && i < buf.length; i++) {
sb.append('0');
sb.append('x');
sb.append(hexchars[(buf[i] & 0xF0) >> 4]);
sb.append(hexchars[buf[i] & 0x0F]);
if ((i+1) < len && (i+1) < buf.length)
sb.append(',');
}
return sb.toString();
}
}
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