mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-07 13:54:33 +00:00
59 lines
1.6 KiB
Java
59 lines
1.6 KiB
Java
class utilTest {
|
|
|
|
public static void main(String[] argv) throws Throwable {
|
|
byte[] b = new byte[] {
|
|
0x01, 0x23, 0x45, 0x67, (byte) 0x89, (byte) 0xab,
|
|
(byte) 0xcd, (byte) 0xef
|
|
};
|
|
String s = "0123456789ABCDEF";
|
|
System.out.println(toString(b));
|
|
System.out.println(s);
|
|
System.out.println(toString(toBytesFromString(s)));
|
|
}
|
|
|
|
// The following comes from the GNU Crypto project gnu.crypto.util.Util
|
|
|
|
private static final char[] HEX_DIGITS = {
|
|
'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
|
|
};
|
|
|
|
public static byte[] toBytesFromString(String s) {
|
|
int limit = s.length();
|
|
byte[] result = new byte[((limit + 1) / 2)];
|
|
int i = 0, j = 0;
|
|
if ((limit % 2) == 1) {
|
|
result[j++] = (byte) fromDigit(s.charAt(i++));
|
|
}
|
|
while (i < limit) {
|
|
result[j++] =
|
|
(byte)((fromDigit(s.charAt(i++)) << 4) | fromDigit(s.charAt(i++)));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
public static int fromDigit(char c) {
|
|
if (c >= '0' && c <= '9') {
|
|
return c - '0';
|
|
} else if (c >= 'A' && c <= 'F') {
|
|
return c - 'A' + 10;
|
|
} else if (c >= 'a' && c <= 'f') {
|
|
return c - 'a' + 10;
|
|
} else
|
|
throw new IllegalArgumentException("Invalid hexadecimal digit: " + c);
|
|
}
|
|
|
|
public static String toString(byte[] ba) {
|
|
return toString(ba, 0, ba.length);
|
|
}
|
|
|
|
public static final String toString(byte[] ba, int offset, int length) {
|
|
char[] buf = new char[length * 2];
|
|
for (int i = 0, j = 0, k; i < length; ) {
|
|
k = ba[offset + i++];
|
|
buf[j++] = HEX_DIGITS[(k >>> 4) & 0x0F];
|
|
buf[j++] = HEX_DIGITS[ k & 0x0F];
|
|
}
|
|
return new String(buf);
|
|
}
|
|
}
|