109 lines
4.0 KiB
C#
109 lines
4.0 KiB
C#
/*
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* Copyright (C) 2007-2008, Jeff Thompson
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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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 copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Collections;
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using System.Collections.Generic;
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namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog
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{
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/// <summary>
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/// A FindallAnswers holds answers for findall.
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/// </summary>
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public class FindallAnswers
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{
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private object _template;
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private List<object> _bagArray;
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public FindallAnswers(object Template)
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{
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_template = Template;
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_bagArray = new List<object>();
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}
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public void add()
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{
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_bagArray.Add(YP.makeCopy(_template, new Variable.CopyStore()));
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}
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public List<object> resultArray()
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{
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return _bagArray;
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}
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/// <summary>
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/// Unify Bag with the result. This frees the internal answers, so you can only call this once.
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/// </summary>
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/// <param name="Bag"></param>
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/// <returns></returns>
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public IEnumerable<bool> result(object Bag)
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{
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object result = ListPair.make(_bagArray);
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// Try to free the memory.
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_bagArray = null;
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return YP.unify(Bag, result);
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}
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// disable warning on l1, don't see how we can
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// code this differently
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#pragma warning disable 0168
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/// <summary>
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/// This is a simplified findall when the goal is a single call.
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/// </summary>
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/// <param name="Template"></param>
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/// <param name="goal"></param>
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/// <param name="Bag"></param>
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/// <returns></returns>
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public static IEnumerable<bool> findall(object Template, IEnumerable<bool> goal, object Bag)
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{
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FindallAnswers findallAnswers = new FindallAnswers(Template);
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foreach (bool l1 in goal)
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findallAnswers.add();
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return findallAnswers.result(Bag);
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}
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/// <summary>
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/// Like findall, except return an array of the results.
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/// </summary>
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/// <param name="template"></param>
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/// <param name="goal"></param>
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/// <returns></returns>
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public static List<object> findallArray(object Template, IEnumerable<bool> goal)
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{
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FindallAnswers findallAnswers = new FindallAnswers(Template);
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foreach (bool l1 in goal)
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findallAnswers.add();
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return findallAnswers.resultArray();
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}
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#pragma warning restore 0168
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}
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}
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