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- /*
- * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
- * 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.revwalk;
-
- import java.io.IOException;
-
- import org.eclipse.jgit.errors.IncorrectObjectTypeException;
- import org.eclipse.jgit.errors.MissingObjectException;
-
- /** A queue of commits in FIFO order. */
- public class FIFORevQueue extends BlockRevQueue {
- private Block head;
-
- private Block tail;
-
- /** Create an empty FIFO queue. */
- public FIFORevQueue() {
- super();
- }
-
- FIFORevQueue(final Generator s) throws MissingObjectException,
- IncorrectObjectTypeException, IOException {
- super(s);
- }
-
- public void add(final RevCommit c) {
- Block b = tail;
- if (b == null) {
- b = free.newBlock();
- b.add(c);
- head = b;
- tail = b;
- return;
- } else if (b.isFull()) {
- b = free.newBlock();
- tail.next = b;
- tail = b;
- }
- b.add(c);
- }
-
- /**
- * Insert the commit pointer at the front of the queue.
- *
- * @param c
- * the commit to insert into the queue.
- */
- public void unpop(final RevCommit c) {
- Block b = head;
- if (b == null) {
- b = free.newBlock();
- b.resetToMiddle();
- b.add(c);
- head = b;
- tail = b;
- return;
- } else if (b.canUnpop()) {
- b.unpop(c);
- return;
- }
-
- b = free.newBlock();
- b.resetToEnd();
- b.unpop(c);
- b.next = head;
- head = b;
- }
-
- public RevCommit next() {
- final Block b = head;
- if (b == null)
- return null;
-
- final RevCommit c = b.pop();
- if (b.isEmpty()) {
- head = b.next;
- if (head == null)
- tail = null;
- free.freeBlock(b);
- }
- return c;
- }
-
- public void clear() {
- head = null;
- tail = null;
- free.clear();
- }
-
- boolean everbodyHasFlag(final int f) {
- for (Block b = head; b != null; b = b.next) {
- for (int i = b.headIndex; i < b.tailIndex; i++)
- if ((b.commits[i].flags & f) == 0)
- return false;
- }
- return true;
- }
-
- boolean anybodyHasFlag(final int f) {
- for (Block b = head; b != null; b = b.next) {
- for (int i = b.headIndex; i < b.tailIndex; i++)
- if ((b.commits[i].flags & f) != 0)
- return true;
- }
- return false;
- }
-
- void removeFlag(final int f) {
- final int not_f = ~f;
- for (Block b = head; b != null; b = b.next) {
- for (int i = b.headIndex; i < b.tailIndex; i++)
- b.commits[i].flags &= not_f;
- }
- }
-
- public String toString() {
- final StringBuilder s = new StringBuilder();
- for (Block q = head; q != null; q = q.next) {
- for (int i = q.headIndex; i < q.tailIndex; i++)
- describe(s, q.commits[i]);
- }
- return s.toString();
- }
- }
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