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Viewing changes to contrib/NGit/NGit.Revwalk/BoundaryGenerator.cs

  • Committer: Bazaar Package Importer
  • Author(s): Jo Shields
  • Date: 2011-06-27 17:03:13 UTC
  • mto: (1.8.1 upstream)
  • mto: This revision was merged to the branch mainline in revision 54.
  • Revision ID: james.westby@ubuntu.com-20110627170313-6cvz3s19x6e9hqe9
Import upstream version 2.5.92+dfsg

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contrib/NGit/NGit.Revwalk/BoundaryGenerator.cs
 
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/*
 
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This code is derived from jgit (http://eclipse.org/jgit).
 
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Copyright owners are documented in jgit's IP log.
 
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This program and the accompanying materials are made available
 
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under the terms of the Eclipse Distribution License v1.0 which
 
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accompanies this distribution, is reproduced below, and is
 
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available at http://www.eclipse.org/org/documents/edl-v10.php
 
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All rights reserved.
 
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Redistribution and use in source and binary forms, with or
 
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without modification, are permitted provided that the following
 
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conditions are met:
 
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- Redistributions of source code must retain the above copyright
 
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  notice, this list of conditions and the following disclaimer.
 
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- Redistributions in binary form must reproduce the above
 
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  copyright notice, this list of conditions and the following
 
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  disclaimer in the documentation and/or other materials provided
 
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  with the distribution.
 
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- Neither the name of the Eclipse Foundation, Inc. nor the
 
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  names of its contributors may be used to endorse or promote
 
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  products derived from this software without specific prior
 
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  written permission.
 
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
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*/
 
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using NGit.Revwalk;
 
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using Sharpen;
 
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namespace NGit.Revwalk
 
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{
 
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        internal class BoundaryGenerator : Generator
 
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        {
 
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                internal const int UNINTERESTING = RevWalk.UNINTERESTING;
 
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                internal Generator g;
 
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                internal BoundaryGenerator(RevWalk w, Generator s)
 
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                {
 
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                        g = new BoundaryGenerator.InitialGenerator(this, w, s);
 
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                }
 
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                internal override int OutputType()
 
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                {
 
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                        return g.OutputType() | HAS_UNINTERESTING;
 
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                }
 
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                internal override void ShareFreeList(BlockRevQueue q)
 
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                {
 
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                        g.ShareFreeList(q);
 
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                }
 
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                /// <exception cref="NGit.Errors.MissingObjectException"></exception>
 
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                /// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
 
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                /// <exception cref="System.IO.IOException"></exception>
 
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                internal override RevCommit Next()
 
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                {
 
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                        return g.Next();
 
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                }
 
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                private class InitialGenerator : Generator
 
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                {
 
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                        private const int PARSED = RevWalk.PARSED;
 
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                        private const int DUPLICATE = RevWalk.TEMP_MARK;
 
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                        private readonly RevWalk walk;
 
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                        private readonly FIFORevQueue held;
 
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                        private readonly Generator source;
 
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                        internal InitialGenerator(BoundaryGenerator _enclosing, RevWalk w, Generator s)
 
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                        {
 
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                                this._enclosing = _enclosing;
 
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                                this.walk = w;
 
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                                this.held = new FIFORevQueue();
 
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                                this.source = s;
 
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                                this.source.ShareFreeList(this.held);
 
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                        }
 
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                        internal override int OutputType()
 
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                        {
 
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                                return this.source.OutputType();
 
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                        }
 
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                        internal override void ShareFreeList(BlockRevQueue q)
 
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                        {
 
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                                q.ShareFreeList(this.held);
 
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                        }
 
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                        /// <exception cref="NGit.Errors.MissingObjectException"></exception>
 
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                        /// <exception cref="NGit.Errors.IncorrectObjectTypeException"></exception>
 
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                        /// <exception cref="System.IO.IOException"></exception>
 
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                        internal override RevCommit Next()
 
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                        {
 
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                                RevCommit c = this.source.Next();
 
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                                if (c != null)
 
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                                {
 
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                                        foreach (RevCommit p in c.parents)
 
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                                        {
 
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                                                if ((p.flags & BoundaryGenerator.UNINTERESTING) != 0)
 
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                                                {
 
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                                                        this.held.Add(p);
 
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                                                }
 
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                                        }
 
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                                        return c;
 
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                                }
 
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                                FIFORevQueue boundary = new FIFORevQueue();
 
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                                boundary.ShareFreeList(this.held);
 
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                                for (; ; )
 
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                                {
 
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                                        c = this.held.Next();
 
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                                        if (c == null)
 
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                                        {
 
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                                                break;
 
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                                        }
 
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                                        if ((c.flags & BoundaryGenerator.InitialGenerator.DUPLICATE) != 0)
 
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                                        {
 
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                                                continue;
 
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                                        }
 
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                                        if ((c.flags & BoundaryGenerator.InitialGenerator.PARSED) == 0)
 
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                                        {
 
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                                                c.ParseHeaders(this.walk);
 
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                                        }
 
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                                        c.flags |= BoundaryGenerator.InitialGenerator.DUPLICATE;
 
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                                        boundary.Add(c);
 
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                                }
 
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                                boundary.RemoveFlag(BoundaryGenerator.InitialGenerator.DUPLICATE);
 
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                                this._enclosing.g = boundary;
 
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                                return boundary.Next();
 
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                        }
 
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                        private readonly BoundaryGenerator _enclosing;
 
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                }
 
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        }
 
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}