/*
* Copyright 2012-2015 org.opencloudb.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.opencloudb.util;
/**
* @author mycat
*/
public final class HexFormatUtil {
public static byte[] fromHex(String src) {
String[] hex = src.split(" ");
byte[] b = new byte[hex.length];
for (int i = 0; i < hex.length; i++) {
b[i] = (byte) (Integer.parseInt(hex[i], 16) & 0xff);
}
return b;
}
public static String fromHex(String hexString, String charset) {
try {
byte[] b = fromHex(hexString);
if (charset == null) {
return new String(b);
}
return new String(b, charset);
} catch (Exception e) {
return null;
}
}
public static int fromHex2B(String src) {
byte[] b = fromHex(src);
int position = 0;
int i = (b[position++] & 0xff);
i |= (b[position++] & 0xff) << 8;
return i;
}
public static int fromHex4B(String src) {
byte[] b = fromHex(src);
int position = 0;
int i = (b[position++] & 0xff);
i |= (b[position++] & 0xff) << 8;
i |= (b[position++] & 0xff) << 16;
i |= (b[position++] & 0xff) << 24;
return i;
}
public static long fromHex8B(String src) {
byte[] b = fromHex(src);
int position = 0;
long l = (b[position++] & 0xff);
l |= (long) (b[position++] & 0xff) << 8;
l |= (long) (b[position++] & 0xff) << 16;
l |= (long) (b[position++] & 0xff) << 24;
l |= (long) (b[position++] & 0xff) << 32;
l |= (long) (b[position++] & 0xff) << 40;
l |= (long) (b[position++] & 0xff) << 48;
l |= (long) (b[position++] & 0xff) << 56;
return l;
}
}