Mantis#1314. Thank you kindly, Kinoc for YieldProlog.

I have added everything *except* the patch to 
.../LSL/Compiler.cs. The Compiler.cs patch has a 
namespace issue. Lets make a second patch to close
the gap.

1 files changed, 103 insertions, 0 deletions

diff --git a/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/FindallAnswers.cs b/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/FindallAnswers.cs
new file mode 100644
index 0000000..2978cee
--- /dev/null
+++ b/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/FindallAnswers.cs
@@ -0,0 +1,103 @@
+/*

+ * Copyright (C) 2007-2008, Jeff Thompson

+ * 

+ * 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 copyright holder 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.

+ */

+

+using System;

+using System.Collections;

+using System.Collections.Generic;

+

+namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog

+{

+    /// <summary>

+    /// A FindallAnswers holds answers for findall.

+    /// </summary>

+    public class FindallAnswers

+    {

+        private object _template;

+        private List<object> _bagArray;

+

+        public FindallAnswers(object Template)

+        {

+            _template = Template;

+            _bagArray = new List<object>();

+        }

+

+        public void add()

+        {

+            _bagArray.Add(YP.makeCopy(_template, new Variable.CopyStore()));

+        }

+

+        public List<object> resultArray()

+        {

+            return _bagArray;

+        }

+

+        /// <summary>

+        /// Unify Bag with the result. This frees the internal answers, so you can only call this once.

+        /// </summary>

+        /// <param name="Bag"></param>

+        /// <returns></returns>

+        public IEnumerable<bool> result(object Bag)

+        {

+            object result = ListPair.make(_bagArray);

+            // Try to free the memory.

+            _bagArray = null;

+            return YP.unify(Bag, result);

+        }

+

+        /// <summary>

+        /// This is a simplified findall when the goal is a single call.

+        /// </summary>

+        /// <param name="Template"></param>

+        /// <param name="goal"></param>

+        /// <param name="Bag"></param>

+        /// <returns></returns>

+        public static IEnumerable<bool> findall(object Template, IEnumerable<bool> goal, object Bag)

+        {

+            FindallAnswers findallAnswers = new FindallAnswers(Template);

+            foreach (bool l1 in goal)

+                findallAnswers.add();

+            return findallAnswers.result(Bag);

+        }

+

+        /// <summary>

+        /// Like findall, except return an array of the results.

+        /// </summary>

+        /// <param name="template"></param>

+        /// <param name="goal"></param>

+        /// <returns></returns>

+        public static List<object> findallArray(object Template, IEnumerable<bool> goal)

+        {

+            FindallAnswers findallAnswers = new FindallAnswers(Template);

+            foreach (bool l1 in goal)

+                findallAnswers.add();

+            return findallAnswers.resultArray();

+        }

+    }

+}