de.intarsys.tools.hex.HexTools Maven / Gradle / Ivy
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The basic runtime tools and interfaces for intarsys components.
/*
* Copyright (c) 2007, intarsys consulting GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of intarsys nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package de.intarsys.tools.hex;
import java.util.Arrays;
/**
* Helper class for faster mapping of bytes to their hex equivalent
*/
public class HexTools {
/** ASCII byte values for the hex strings. */
public static final byte[][] ByteToHex = { "00".getBytes(),
"01".getBytes(), "02".getBytes(), "03".getBytes(), "04".getBytes(),
"05".getBytes(), "06".getBytes(), "07".getBytes(), "08".getBytes(),
"09".getBytes(), "0A".getBytes(), "0B".getBytes(), "0C".getBytes(),
"0D".getBytes(), "0E".getBytes(), "0F".getBytes(), "10".getBytes(),
"11".getBytes(), "12".getBytes(), "13".getBytes(), "14".getBytes(),
"15".getBytes(), "16".getBytes(), "17".getBytes(), "18".getBytes(),
"19".getBytes(), "1A".getBytes(), "1B".getBytes(), "1C".getBytes(),
"1D".getBytes(), "1E".getBytes(), "1F".getBytes(), "20".getBytes(),
"21".getBytes(), "22".getBytes(), "23".getBytes(), "24".getBytes(),
"25".getBytes(), "26".getBytes(), "27".getBytes(), "28".getBytes(),
"29".getBytes(), "2A".getBytes(), "2B".getBytes(), "2C".getBytes(),
"2D".getBytes(), "2E".getBytes(), "2F".getBytes(), "30".getBytes(),
"31".getBytes(), "32".getBytes(), "33".getBytes(), "34".getBytes(),
"35".getBytes(), "36".getBytes(), "37".getBytes(), "38".getBytes(),
"39".getBytes(), "3A".getBytes(), "3B".getBytes(), "3C".getBytes(),
"3D".getBytes(), "3E".getBytes(), "3F".getBytes(), "40".getBytes(),
"41".getBytes(), "42".getBytes(), "43".getBytes(), "44".getBytes(),
"45".getBytes(), "46".getBytes(), "47".getBytes(), "48".getBytes(),
"49".getBytes(), "4A".getBytes(), "4B".getBytes(), "4C".getBytes(),
"4D".getBytes(), "4E".getBytes(), "4F".getBytes(), "50".getBytes(),
"51".getBytes(), "52".getBytes(), "53".getBytes(), "54".getBytes(),
"55".getBytes(), "56".getBytes(), "57".getBytes(), "58".getBytes(),
"59".getBytes(), "5A".getBytes(), "5B".getBytes(), "5C".getBytes(),
"5D".getBytes(), "5E".getBytes(), "5F".getBytes(), "60".getBytes(),
"61".getBytes(), "62".getBytes(), "63".getBytes(), "64".getBytes(),
"65".getBytes(), "66".getBytes(), "67".getBytes(), "68".getBytes(),
"69".getBytes(), "6A".getBytes(), "6B".getBytes(), "6C".getBytes(),
"6D".getBytes(), "6E".getBytes(), "6F".getBytes(), "70".getBytes(),
"71".getBytes(), "72".getBytes(), "73".getBytes(), "74".getBytes(),
"75".getBytes(), "76".getBytes(), "77".getBytes(), "78".getBytes(),
"79".getBytes(), "7A".getBytes(), "7B".getBytes(), "7C".getBytes(),
"7D".getBytes(), "7E".getBytes(), "7F".getBytes(), "80".getBytes(),
"81".getBytes(), "82".getBytes(), "83".getBytes(), "84".getBytes(),
"85".getBytes(), "86".getBytes(), "87".getBytes(), "88".getBytes(),
"89".getBytes(), "8A".getBytes(), "8B".getBytes(), "8C".getBytes(),
"8D".getBytes(), "8E".getBytes(), "8F".getBytes(), "90".getBytes(),
"91".getBytes(), "92".getBytes(), "93".getBytes(), "94".getBytes(),
"95".getBytes(), "96".getBytes(), "97".getBytes(), "98".getBytes(),
"99".getBytes(), "9A".getBytes(), "9B".getBytes(), "9C".getBytes(),
"9D".getBytes(), "9E".getBytes(), "9F".getBytes(), "A0".getBytes(),
"A1".getBytes(), "A2".getBytes(), "A3".getBytes(), "A4".getBytes(),
"A5".getBytes(), "A6".getBytes(), "A7".getBytes(), "A8".getBytes(),
"A9".getBytes(), "AA".getBytes(), "AB".getBytes(), "AC".getBytes(),
"AD".getBytes(), "AE".getBytes(), "AF".getBytes(), "B0".getBytes(),
"B1".getBytes(), "B2".getBytes(), "B3".getBytes(), "B4".getBytes(),
"B5".getBytes(), "B6".getBytes(), "B7".getBytes(), "B8".getBytes(),
"B9".getBytes(), "BA".getBytes(), "BB".getBytes(), "BC".getBytes(),
"BD".getBytes(), "BE".getBytes(), "BF".getBytes(), "C0".getBytes(),
"C1".getBytes(), "C2".getBytes(), "C3".getBytes(), "C4".getBytes(),
"C5".getBytes(), "C6".getBytes(), "C7".getBytes(), "C8".getBytes(),
"C9".getBytes(), "CA".getBytes(), "CB".getBytes(), "CC".getBytes(),
"CD".getBytes(), "CE".getBytes(), "CF".getBytes(), "D0".getBytes(),
"D1".getBytes(), "D2".getBytes(), "D3".getBytes(), "D4".getBytes(),
"D5".getBytes(), "D6".getBytes(), "D7".getBytes(), "D8".getBytes(),
"D9".getBytes(), "DA".getBytes(), "DB".getBytes(), "DC".getBytes(),
"DD".getBytes(), "DE".getBytes(), "DF".getBytes(), "E0".getBytes(),
"E1".getBytes(), "E2".getBytes(), "E3".getBytes(), "E4".getBytes(),
"E5".getBytes(), "E6".getBytes(), "E7".getBytes(), "E8".getBytes(),
"E9".getBytes(), "EA".getBytes(), "EB".getBytes(), "EC".getBytes(),
"ED".getBytes(), "EE".getBytes(), "EF".getBytes(), "F0".getBytes(),
"F1".getBytes(), "F2".getBytes(), "F3".getBytes(), "F4".getBytes(),
"F5".getBytes(), "F6".getBytes(), "F7".getBytes(), "F8".getBytes(),
"F9".getBytes(), "FA".getBytes(), "FB".getBytes(), "FC".getBytes(),
"FD".getBytes(), "FE".getBytes(), "FF".getBytes(), };
/**
* ASCII byte values for the hex strings.
*/
public static final byte[][] byteToHexLower = { "00".getBytes(),
"01".getBytes(), "02".getBytes(), "03".getBytes(), "04".getBytes(),
"05".getBytes(), "06".getBytes(), "07".getBytes(), "08".getBytes(),
"09".getBytes(), "0a".getBytes(), "0b".getBytes(), "0c".getBytes(),
"0d".getBytes(), "0e".getBytes(), "0f".getBytes(), "10".getBytes(),
"11".getBytes(), "12".getBytes(), "13".getBytes(), "14".getBytes(),
"15".getBytes(), "16".getBytes(), "17".getBytes(), "18".getBytes(),
"19".getBytes(), "1a".getBytes(), "1b".getBytes(), "1c".getBytes(),
"1d".getBytes(), "1e".getBytes(), "1f".getBytes(), "20".getBytes(),
"21".getBytes(), "22".getBytes(), "23".getBytes(), "24".getBytes(),
"25".getBytes(), "26".getBytes(), "27".getBytes(), "28".getBytes(),
"29".getBytes(), "2a".getBytes(), "2b".getBytes(), "2c".getBytes(),
"2d".getBytes(), "2e".getBytes(), "2f".getBytes(), "30".getBytes(),
"31".getBytes(), "32".getBytes(), "33".getBytes(), "34".getBytes(),
"35".getBytes(), "36".getBytes(), "37".getBytes(), "38".getBytes(),
"39".getBytes(), "3a".getBytes(), "3b".getBytes(), "3c".getBytes(),
"3d".getBytes(), "3e".getBytes(), "3f".getBytes(), "40".getBytes(),
"41".getBytes(), "42".getBytes(), "43".getBytes(), "44".getBytes(),
"45".getBytes(), "46".getBytes(), "47".getBytes(), "48".getBytes(),
"49".getBytes(), "4a".getBytes(), "4b".getBytes(), "4c".getBytes(),
"4d".getBytes(), "4e".getBytes(), "4f".getBytes(), "50".getBytes(),
"51".getBytes(), "52".getBytes(), "53".getBytes(), "54".getBytes(),
"55".getBytes(), "56".getBytes(), "57".getBytes(), "58".getBytes(),
"59".getBytes(), "5a".getBytes(), "5b".getBytes(), "5c".getBytes(),
"5d".getBytes(), "5e".getBytes(), "5f".getBytes(), "60".getBytes(),
"61".getBytes(), "62".getBytes(), "63".getBytes(), "64".getBytes(),
"65".getBytes(), "66".getBytes(), "67".getBytes(), "68".getBytes(),
"69".getBytes(), "6a".getBytes(), "6b".getBytes(), "6c".getBytes(),
"6d".getBytes(), "6e".getBytes(), "6f".getBytes(), "70".getBytes(),
"71".getBytes(), "72".getBytes(), "73".getBytes(), "74".getBytes(),
"75".getBytes(), "76".getBytes(), "77".getBytes(), "78".getBytes(),
"79".getBytes(), "7a".getBytes(), "7b".getBytes(), "7c".getBytes(),
"7d".getBytes(), "7e".getBytes(), "7f".getBytes(), "80".getBytes(),
"81".getBytes(), "82".getBytes(), "83".getBytes(), "84".getBytes(),
"85".getBytes(), "86".getBytes(), "87".getBytes(), "88".getBytes(),
"89".getBytes(), "8a".getBytes(), "8b".getBytes(), "8c".getBytes(),
"8d".getBytes(), "8e".getBytes(), "8f".getBytes(), "90".getBytes(),
"91".getBytes(), "92".getBytes(), "93".getBytes(), "94".getBytes(),
"95".getBytes(), "96".getBytes(), "97".getBytes(), "98".getBytes(),
"99".getBytes(), "9a".getBytes(), "9b".getBytes(), "9c".getBytes(),
"9d".getBytes(), "9e".getBytes(), "9f".getBytes(), "a0".getBytes(),
"a1".getBytes(), "a2".getBytes(), "a3".getBytes(), "a4".getBytes(),
"a5".getBytes(), "a6".getBytes(), "a7".getBytes(), "a8".getBytes(),
"a9".getBytes(), "aa".getBytes(), "ab".getBytes(), "ac".getBytes(),
"ad".getBytes(), "ae".getBytes(), "af".getBytes(), "b0".getBytes(),
"b1".getBytes(), "b2".getBytes(), "b3".getBytes(), "b4".getBytes(),
"b5".getBytes(), "b6".getBytes(), "b7".getBytes(), "b8".getBytes(),
"b9".getBytes(), "ba".getBytes(), "bb".getBytes(), "bc".getBytes(),
"bd".getBytes(), "be".getBytes(), "bf".getBytes(), "c0".getBytes(),
"c1".getBytes(), "c2".getBytes(), "c3".getBytes(), "c4".getBytes(),
"c5".getBytes(), "c6".getBytes(), "c7".getBytes(), "c8".getBytes(),
"c9".getBytes(), "ca".getBytes(), "cb".getBytes(), "cc".getBytes(),
"cd".getBytes(), "ce".getBytes(), "cf".getBytes(), "d0".getBytes(),
"d1".getBytes(), "d2".getBytes(), "d3".getBytes(), "d4".getBytes(),
"d5".getBytes(), "d6".getBytes(), "d7".getBytes(), "d8".getBytes(),
"d9".getBytes(), "da".getBytes(), "db".getBytes(), "dc".getBytes(),
"dd".getBytes(), "de".getBytes(), "df".getBytes(), "e0".getBytes(),
"e1".getBytes(), "e2".getBytes(), "e3".getBytes(), "e4".getBytes(),
"e5".getBytes(), "e6".getBytes(), "e7".getBytes(), "e8".getBytes(),
"e9".getBytes(), "ea".getBytes(), "eb".getBytes(), "ec".getBytes(),
"ed".getBytes(), "ee".getBytes(), "ef".getBytes(), "f0".getBytes(),
"f1".getBytes(), "f2".getBytes(), "f3".getBytes(), "f4".getBytes(),
"f5".getBytes(), "f6".getBytes(), "f7".getBytes(), "f8".getBytes(),
"f9".getBytes(), "fa".getBytes(), "fb".getBytes(), "fc".getBytes(),
"fd".getBytes(), "fe".getBytes(), "ff".getBytes() };
public static String bytesToHexDump(byte[] data, int offset, int length,
int groupSize, int groups, boolean space) {
length = data.length - offset < length ? data.length - offset : length;
StringBuilder buffer = new StringBuilder();
int byteCounter = 0;
int groupCounter = 0;
for (int i = 0; i < length; i++) {
byte[] bytes = HexTools.ByteToHex[data[offset + i] & 0xFF];
buffer.append((char) bytes[0]);
buffer.append((char) bytes[1]);
if (space) {
buffer.append(" ");
}
byteCounter++;
if (byteCounter >= groupSize) {
byteCounter = 0;
groupCounter++;
buffer.append(" ");
}
if (groupCounter >= groups) {
buffer.append("\n");
groupCounter = 0;
}
}
return buffer.toString();
}
public static String bytesToHexString(byte[] data) {
return bytesToHexString(data, 0, data.length);
}
public static String bytesToHexString(byte[] data, int offset, int length) {
return bytesToHexString(data, offset, length, false);
}
public static String bytesToHexString(byte[] data, int offset, int length,
boolean space) {
length = data.length - offset < length ? data.length - offset : length;
StringBuilder buffer = new StringBuilder();
for (int i = 0; i < length; i++) {
byte[] bytes = HexTools.ByteToHex[data[offset + i] & 0xFF];
buffer.append((char) bytes[0]);
buffer.append((char) bytes[1]);
if (space) {
buffer.append(" ");
}
}
return buffer.toString();
}
/**
* The numeric value for the hex digit, return -1 if not valid digit
*
* @param c
* A char representing a hex digit.
*
* @return The numeric value of the hex digit
*/
public static int hexDigitToInt(char c) {
switch (c) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return c - '0';
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
return (10 + c) - 'a';
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
return (10 + c) - 'A';
default:
return -1;
}
}
public static byte[] hexStringToBytes(String hexString) {
byte[] data = new byte[hexString.length() + 1 / 2];
int index = 0;
char[] chars = hexString.toCharArray();
int i = 0;
int c;
while (i < chars.length) {
int b = 0;
c = -1;
while (i < chars.length && (c = hexDigitToInt(chars[i++])) == -1) {
}
if (c != -1) {
b = c;
c = -1;
while (i < chars.length
&& (c = hexDigitToInt(chars[i++])) == -1) {
}
if (c != -1) {
b = ((b << 4) + c);
}
data[index++] = (byte) (b & 0xFF);
}
}
return Arrays.copyOfRange(data, 0, index);
}
public static int hexStringToInt(String hexString) {
int result = 0;
for (int i = 0; i < hexString.length(); i++) {
result = (result << 4) + hexDigitToInt(hexString.charAt(i));
}
return result;
}
/**
* Evaluate to true if i is a valid hex digit
*
* @param i
* A char representing a hex digit.
*
* @return true if i is a valid hex digit.
*/
public static boolean isHexDigit(char i) {
return ((i >= '0') && (i <= '9')) || ((i >= 'a') && (i <= 'f'))
|| ((i >= 'A') && (i <= 'F'));
}
}
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