90 lines
2.9 KiB
Java
90 lines
2.9 KiB
Java
/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.*;
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class Utils {
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static final String BASE = System.getProperty("test.src", ".");
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private final static char[] hexDigits = "0123456789abcdef".toCharArray();
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public static String toString(byte[] b) {
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if (b == null) {
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return "(null)";
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}
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StringBuffer sb = new StringBuffer(b.length * 3);
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for (int i = 0; i < b.length; i++) {
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int k = b[i] & 0xff;
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if (i != 0) {
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sb.append(':');
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}
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sb.append(hexDigits[k >>> 4]);
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sb.append(hexDigits[k & 0xf]);
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}
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return sb.toString();
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}
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public static byte[] parse(String s) {
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if (s.equals("(null)")) {
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return null;
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}
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try {
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int n = s.length();
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ByteArrayOutputStream out = new ByteArrayOutputStream(n / 3);
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StringReader r = new StringReader(s);
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while (true) {
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int b1 = nextNibble(r);
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if (b1 < 0) {
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break;
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}
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int b2 = nextNibble(r);
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if (b2 < 0) {
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throw new RuntimeException("Invalid string " + s);
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}
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int b = (b1 << 4) | b2;
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out.write(b);
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}
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return out.toByteArray();
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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private static int nextNibble(StringReader r) throws IOException {
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while (true) {
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int ch = r.read();
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if (ch == -1) {
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return -1;
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} else if ((ch >= '0') && (ch <= '9')) {
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return ch - '0';
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} else if ((ch >= 'a') && (ch <= 'f')) {
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return ch - 'a' + 10;
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} else if ((ch >= 'A') && (ch <= 'F')) {
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return ch - 'A' + 10;
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}
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}
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}
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}
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