| /* |
| * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.test.lib; |
| |
| import java.math.BigInteger; |
| |
| /** |
| * Utility class containing conversions between strings, arrays, and numeric |
| * values. |
| */ |
| |
| public class Convert { |
| |
| // Convert from a byte array to a hexadecimal representation as a string. |
| public static String byteArrayToHexString(byte[] arr) { |
| StringBuilder result = new StringBuilder(); |
| for (int i = 0; i < arr.length; ++i) { |
| byte curVal = arr[i]; |
| result.append(Character.forDigit(curVal >> 4 & 0xF, 16)); |
| result.append(Character.forDigit(curVal & 0xF, 16)); |
| } |
| return result.toString(); |
| } |
| |
| // Expand a single byte to a byte array |
| public static byte[] byteToByteArray(byte v, int length) { |
| byte[] result = new byte[length]; |
| result[0] = v; |
| return result; |
| } |
| |
| // Convert a hexadecimal string to a byte array |
| public static byte[] hexStringToByteArray(String str) { |
| byte[] result = new byte[str.length() / 2]; |
| for (int i = 0; i < result.length; i++) { |
| result[i] = (byte) Character.digit(str.charAt(2 * i), 16); |
| result[i] <<= 4; |
| result[i] += Character.digit(str.charAt(2 * i + 1), 16); |
| } |
| return result; |
| } |
| |
| /* |
| * Convert a hexadecimal string to the corresponding little-ending number |
| * as a BigInteger. The clearHighBit argument determines whether the most |
| * significant bit of the highest byte should be set to 0 in the result. |
| */ |
| public static |
| BigInteger hexStringToBigInteger(boolean clearHighBit, String str) { |
| BigInteger result = BigInteger.ZERO; |
| for (int i = 0; i < str.length() / 2; i++) { |
| int curVal = Character.digit(str.charAt(2 * i), 16); |
| curVal <<= 4; |
| curVal += Character.digit(str.charAt(2 * i + 1), 16); |
| if (clearHighBit && i == str.length() / 2 - 1) { |
| curVal &= 0x7F; |
| } |
| result = result.add(BigInteger.valueOf(curVal).shiftLeft(8 * i)); |
| } |
| return result; |
| } |
| } |
| |
| |