package tools;
import java.io.ByteArrayOutputStream;
import org.apache.mina.common.ByteBuffer;
/**
* Provides a class for manipulating hexadecimal numbers.
*
* @author Frz
* @since Revision 206
* @version 1.0
*/
public class HexTool {
private static final char[] HEX = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
/**
* Turns a byte into a hexadecimal string.
*
* @param byteValue The byte to convert.
* @return The hexadecimal representation of <code>byteValue</code>
*/
public static String toString(final byte byteValue) {
final int tmp = byteValue << 8;
char[] retstr = new char[]{HEX[(tmp >> 12) & 0x0F], HEX[(tmp >> 8) & 0x0F]};
return String.valueOf(retstr);
}
/**
* Turns a <code>org.apache.mina.common.ByteBuffer</code> into a hexadecimal
* string.
*
* @param buf The <code>org.apache.mina.common.ByteBuffer</code> to convert.
* @return The hexadecimal representation of <code>buf</code>
*/
public static String toString(final ByteBuffer buf) {
buf.flip();
final byte arr[] = new byte[buf.remaining()];
buf.get(arr);
String ret = toString(arr);
buf.flip();
buf.put(arr);
return ret;
}
/**
* Turns an integer into a hexadecimal string.
*
* @param intValue The integer to transform.
* @return The hexadecimal representation of <code>intValue</code>.
*/
public static String toString(final int intValue) {
return Integer.toHexString(intValue);
}
/**
* Turns an array of bytes into a hexadecimal string.
*
* @param bytes The bytes to convert.
* @return The hexadecimal representation of <code>bytes</code>
*/
public static String toString(final byte[] bytes) {
StringBuilder hexed = new StringBuilder();
for (int i = 0; i < bytes.length; i++) {
hexed.append(toString(bytes[i]));
hexed.append(' ');
}
return hexed.substring(0, hexed.length() - 1);
}
/**
* Turns an array of bytes into a ASCII string. Any non-printable characters
* are replaced by a period (<code>.</code>)
*
* @param bytes The bytes to convert.
* @return The ASCII hexadecimal representation of <code>bytes</code>
*/
public static String toStringFromAscii(final byte[] bytes) {
char[] ret = new char[bytes.length];
for (int x = 0; x < bytes.length; x++) {
if (bytes[x] < 32 && bytes[x] >= 0) {
ret[x] = '.';
} else {
int chr = ((short) bytes[x]) & 0xFF;
ret[x] = (char) chr;
}
}
return String.valueOf(ret);
}
public static String toPaddedStringFromAscii(final byte[] bytes) {
final String str = toStringFromAscii(bytes);
StringBuilder ret = new StringBuilder(str.length() * 3);
for (int i = 0; i < str.length(); i++) {
ret.append(str.charAt(i));
ret.append(" ");
}
return ret.toString();
}
/**
* Turns an hexadecimal string into a byte array.
*
* @param hex The string to convert.
* @return The byte array representation of <code>hex</code>
*/
public static byte[] getByteArrayFromHexString(final String hex) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int nexti = 0;
int nextb = 0;
boolean highoc = true;
outer:
for (;;) {
int number = -1;
while (number == -1) {
if (nexti == hex.length()) {
break outer;
}
char chr = hex.charAt(nexti);
if (chr >= '0' && chr <= '9') {
number = chr - '0';
} else if (chr >= 'a' && chr <= 'f') {
number = chr - 'a' + 10;
} else if (chr >= 'A' && chr <= 'F') {
number = chr - 'A' + 10;
} else {
number = -1;
}
nexti++;
}
if (highoc) {
nextb = number << 4;
highoc = false;
} else {
nextb |= number;
highoc = true;
baos.write(nextb);
}
}
return baos.toByteArray();
}
public static byte[] hex(String hex) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int nexti = 0;
int nextb = 0;
boolean highoc = true;
outer:
while (true) {
int number = -1;
while (number == -1) {
if (nexti == hex.length()) {
break outer;
}
char chr = hex.charAt(nexti);
if ((chr >= '0') && (chr <= '9')) {
number = chr - '0';
} else if ((chr >= 'a') && (chr <= 'f')) {
number = chr - 'a' + 10;
} else if ((chr >= 'A') && (chr <= 'F')) {
number = chr - 'A' + 10;
} else {
number = -1;
}
nexti++;
}
if (highoc) {
nextb = number << 4;
highoc = false;
} else {
nextb |= number;
highoc = true;
baos.write(nextb);
}
}
label161:
return baos.toByteArray();
}
public static String getOpcodeToString(final int op) {
return "0x" + StringUtil.getLeftPaddedStr(Integer.toHexString(op).toUpperCase(), '0', 4);
}
}