| /* |
| * Copyright (c) 2001, 2006, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 com.sun.jmx.snmp.internal; |
| |
| import com.sun.jmx.snmp.SnmpDefinitions; |
| /** |
| * Utility class used to deal with various data representations. |
| * <p><b>This API is a Sun Microsystems internal API and is subject |
| * to change without notice.</b></p> |
| * @since 1.5 |
| */ |
| public class SnmpTools implements SnmpDefinitions { |
| |
| /** |
| * Translates a binary representation in an ASCII one. The returned string is an hexadecimal string starting with 0x. |
| * @param data Binary to translate. |
| * @return Translated binary. |
| */ |
| static public String binary2ascii(byte[] data, int length) |
| { |
| if(data == null) return null; |
| final int size = (length * 2) + 2; |
| byte[] asciiData = new byte[size]; |
| asciiData[0] = (byte) '0'; |
| asciiData[1] = (byte) 'x'; |
| for (int i=0; i < length; i++) { |
| int j = i*2; |
| int v = (data[i] & 0xf0); |
| v = v >> 4; |
| if (v < 10) |
| asciiData[j+2] = (byte) ('0' + v); |
| else |
| asciiData[j+2] = (byte) ('A' + (v - 10)); |
| v = ((data[i] & 0xf)); |
| if (v < 10) |
| asciiData[j+1+2] = (byte) ('0' + v); |
| else |
| asciiData[j+1+2] = (byte) ('A' + (v - 10)); |
| } |
| return new String(asciiData); |
| } |
| |
| /** |
| * Translates a binary representation in an ASCII one. The returned string is an hexadecimal string starting with 0x. |
| * @param data Binary to translate. |
| * @return Translated binary. |
| */ |
| static public String binary2ascii(byte[] data) |
| { |
| return binary2ascii(data, data.length); |
| } |
| /** |
| * Translates a stringified representation in a binary one. The passed string is an hexadecimal one starting with 0x. |
| * @param str String to translate. |
| * @return Translated string. |
| */ |
| static public byte[] ascii2binary(String str) { |
| if(str == null) return null; |
| String val = str.substring(2); |
| |
| int size = val.length(); |
| byte []buf = new byte[size/2]; |
| byte []p = val.getBytes(); |
| |
| for(int i = 0; i < (size / 2); i++) |
| { |
| int j = i * 2; |
| byte v = 0; |
| if (p[j] >= '0' && p[j] <= '9') { |
| v = (byte) ((p[j] - '0') << 4); |
| } |
| else if (p[j] >= 'a' && p[j] <= 'f') { |
| v = (byte) ((p[j] - 'a' + 10) << 4); |
| } |
| else if (p[j] >= 'A' && p[j] <= 'F') { |
| v = (byte) ((p[j] - 'A' + 10) << 4); |
| } |
| else |
| throw new Error("BAD format :" + str); |
| |
| if (p[j+1] >= '0' && p[j+1] <= '9') { |
| //System.out.println("ascii : " + p[j+1]); |
| v += (p[j+1] - '0'); |
| //System.out.println("binary : " + v); |
| } |
| else if (p[j+1] >= 'a' && p[j+1] <= 'f') { |
| //System.out.println("ascii : " + p[j+1]); |
| v += (p[j+1] - 'a' + 10); |
| //System.out.println("binary : " + v+1); |
| } |
| else if (p[j+1] >= 'A' && p[j+1] <= 'F') { |
| //System.out.println("ascii : " + p[j+1]); |
| v += (p[j+1] - 'A' + 10); |
| //System.out.println("binary : " + v); |
| } |
| else |
| throw new Error("BAD format :" + str); |
| |
| buf[i] = v; |
| } |
| return buf; |
| } |
| } |