71 lines
1.6 KiB
Java
71 lines
1.6 KiB
Java
package org.hwo;
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import static org.hwo.logging.Logging.log;
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import static org.hwo.logging.LogLevel.*;
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public class ByteArrayHexlifier {
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protected static char[] hexDigits = "0123456789ABCDEF".toCharArray();
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public static String hexlify(String source){
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String hex = byteArrayToString(source.getBytes());
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log(DEBUG,"hexlify: %s -> %s",source,hex);
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return hex;
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}
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public static String unhexlify(String source){
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String unhex = new String( stringToByteArray(source) );
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log(DEBUG,"unhexlify: %s -> %s",source,unhex);
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return unhex;
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}
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public static String byteArrayToString(byte[] bytes)
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{
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char[] target = new char[bytes.length * 2];
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for (int i=0;i<bytes.length;i++)
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{
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target[2*i+1] = hexDigits[bytes[i] & 0x0f];
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target[(2*i)] = hexDigits[(bytes[i]>>4) & 0x0f];
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}
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return new String(target);
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}
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public static byte[] stringToByteArray(String hexstring)
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{
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byte[] buffer;
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int len = hexstring.length();
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if ((len % 2)!=0)
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len--;
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buffer = new byte[ len / 2];
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char[] source = hexstring.toCharArray();
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for (int i=0;i< buffer.length;i++)
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{
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if ((source[2*i] >= 'A')&&(source[2*i] <= 'F'))
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{
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buffer[i] = (byte)((source[2*i] - 'A' + 10)<<4);
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} else if ((source[2*i] >= '0')&&(source[2*i] <= '9'))
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{
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buffer[i] = (byte)((source[2*i] - '0')<<4);
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}
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if ((source[(2*i)+1] >= 'A')&&(source[(2*i)+1] <= 'F'))
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{
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buffer[i] |= (byte)((source[(2*i)+1] - 'A' + 10));
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} else if ((source[(2*i)+1] >= '0')&&(source[(2*i)+1] <= '9'))
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{
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buffer[i] |= (byte)((source[(2*i)+1] - '0'));
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}
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log(DEBUG,"buffer[%d] = %d",i,buffer[i]);
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}
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return buffer;
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}
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}
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