| /* |
| * Copyright (c) 2005, Joe Desbonnet, (jdesbonnet@gmail.com) |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of the <organization> nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY <copyright holder> ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package ie.wombat.jbdiff; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** |
| * @author Joe Desbonnet, jdesbonnet@gmail.com |
| * |
| */ |
| public class Util { |
| |
| /** |
| * Equiv of C library memcmp(). |
| * |
| * @param s1 |
| * @param s1offset |
| * @param s2 |
| * @param n |
| * @return |
| */ |
| /* |
| public final static int memcmp(byte[] s1, int s1offset, byte[] s2, int s2offset, int n) { |
| |
| if ((s1offset + n) > s1.length) { |
| n = s1.length - s1offset; |
| } |
| if ((s2offset + n) > s2.length) { |
| n = s2.length - s2offset; |
| } |
| for (int i = 0; i < n; i++) { |
| if (s1[i + s1offset] != s2[i + s2offset]) { |
| return s1[i + s1offset] < s2[i + s2offset] ? -1 : 1; |
| } |
| } |
| |
| return 0; |
| } |
| */ |
| |
| /** |
| * Equiv of C library memcmp(). |
| * |
| * @param s1 |
| * @param s1offset |
| * @param s2 |
| * @param n |
| * @return |
| */ |
| public final static int memcmp(byte[] s1, int s1offset, byte[] s2, int s2offset) { |
| |
| int n = s1.length - s1offset; |
| |
| if (n > (s2.length-s2offset)) { |
| n = s2.length-s2offset; |
| } |
| for (int i = 0; i < n; i++) { |
| if (s1[i + s1offset] != s2[i + s2offset]) { |
| return s1[i + s1offset] < s2[i + s2offset] ? -1 : 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| public static final boolean readFromStream (InputStream in, byte[] buf, int offset, int len) |
| throws IOException |
| { |
| |
| int totalBytesRead = 0; |
| int nbytes; |
| |
| while ( totalBytesRead < len) { |
| nbytes = in.read(buf,offset+totalBytesRead,len-totalBytesRead); |
| if (nbytes < 0) { |
| System.err.println ("readFromStream(): returning prematurely. Read " |
| + totalBytesRead + " bytes"); |
| return false; |
| } |
| totalBytesRead+=nbytes; |
| } |
| |
| return true; |
| } |
| |
| } |