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- /*
- * Copyright (C) 2009-2010, Google Inc.
- * Copyright (C) 2008-2009, Johannes E. Schindelin <johannes.schindelin@gmx.de>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * 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 Eclipse Foundation, Inc. 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 THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "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 THE COPYRIGHT OWNER OR
- * CONTRIBUTORS 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 org.eclipse.jgit.diff;
-
- import static org.eclipse.jgit.util.RawCharUtil.trimTrailingWhitespace;
-
- /**
- * A version of {@link RawText} that ignores trailing whitespace.
- */
- public class RawTextIgnoreTrailingWhitespace extends RawText {
- /** Creates RawText that ignores only trailing whitespace. */
- @SuppressWarnings("hiding")
- public static final Factory FACTORY = new Factory() {
- public RawText create(byte[] input) {
- return new RawTextIgnoreTrailingWhitespace(input);
- }
- };
-
- /**
- * Create a new sequence from an existing content byte array.
- * <p>
- * The entire array (indexes 0 through length-1) is used as the content.
- *
- * @param input
- * the content array. The array is never modified, so passing
- * through cached arrays is safe.
- */
- public RawTextIgnoreTrailingWhitespace(byte[] input) {
- super(input);
- }
-
- @Override
- public boolean equals(final int i, final Sequence other, final int j) {
- return equals(this, i + 1, (RawText) other, j + 1);
- }
-
- private static boolean equals(final RawText a, final int ai,
- final RawText b, final int bi) {
- if (a.hashes[ai] != b.hashes[bi])
- return false;
-
- int as = a.lines.get(ai);
- int bs = b.lines.get(bi);
- int ae = a.lines.get(ai + 1);
- int be = b.lines.get(bi + 1);
-
- ae = trimTrailingWhitespace(a.content, as, ae);
- be = trimTrailingWhitespace(b.content, bs, be);
-
- if (ae - as != be - bs)
- return false;
-
- while (as < ae) {
- if (a.content[as++] != b.content[bs++])
- return false;
- }
- return true;
- }
-
- @Override
- protected int hashLine(final byte[] raw, int ptr, int end) {
- int hash = 5381;
- end = trimTrailingWhitespace(raw, ptr, end);
- for (; ptr < end; ptr++) {
- hash = (hash << 5) ^ (raw[ptr] & 0xff);
- }
- return hash;
- }
- }
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