clockwerk-opensim-stable – Blame information for rev 1
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1 | vero | 1 | /* |
2 | * Copyright (C) 2007-2008, Jeff Thompson |
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3 | * |
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4 | * All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * * Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * * Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * * Neither the name of the copyright holder nor the names of its contributors |
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15 | * may be used to endorse or promote products derived from this software |
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16 | * without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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21 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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22 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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23 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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24 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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25 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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26 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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27 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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28 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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29 | */ |
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30 | |||
31 | using System; |
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32 | using System.Collections.Generic; |
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33 | |||
34 | namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog |
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35 | { |
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36 | public class Functor1 : IUnifiable |
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37 | { |
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38 | public readonly Atom _name; |
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39 | public readonly object _arg1; |
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40 | |||
41 | public Functor1(Atom name, object arg1) |
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42 | { |
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43 | _name = name; |
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44 | _arg1 = arg1; |
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45 | } |
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46 | |||
47 | public Functor1(string name, object arg1) |
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48 | : this(Atom.a(name), arg1) |
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49 | { |
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50 | } |
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51 | |||
52 | // disable warning on l1, don't see how we can |
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53 | // code this differently |
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54 | #pragma warning disable 0168, 0219 |
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55 | /// <summary> |
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56 | /// If arg is another Functor1, then succeed (yield once) if this and arg have the |
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57 | /// same name and the functor args unify, otherwise fail (don't yield). |
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58 | /// If arg is a Variable, then call its unify to unify with this. |
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59 | /// Otherwise fail (don't yield). |
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60 | /// </summary> |
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61 | /// <param name="arg"></param> |
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62 | /// <returns></returns> |
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63 | public IEnumerable<bool> unify(object arg) |
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64 | { |
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65 | arg = YP.getValue(arg); |
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66 | if (arg is Functor1) |
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67 | { |
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68 | Functor1 argFunctor = (Functor1)arg; |
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69 | if (_name.Equals(argFunctor._name)) |
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70 | { |
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71 | foreach (bool l1 in YP.unify(_arg1, argFunctor._arg1)) |
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72 | yield return false; |
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73 | } |
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74 | } |
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75 | else if (arg is Variable) |
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76 | { |
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77 | foreach (bool l1 in ((Variable)arg).unify(this)) |
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78 | yield return false; |
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79 | } |
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80 | } |
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81 | #pragma warning restore 0168, 0219 |
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82 | |||
83 | |||
84 | public override string ToString() |
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85 | { |
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86 | return _name + "(" + YP.getValue(_arg1) + ")"; |
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87 | } |
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88 | |||
89 | public bool termEqual(object term) |
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90 | { |
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91 | term = YP.getValue(term); |
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92 | if (term is Functor1) |
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93 | { |
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94 | Functor1 termFunctor = (Functor1)term; |
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95 | return _name.Equals(termFunctor._name) && YP.termEqual(_arg1, termFunctor._arg1); |
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96 | } |
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97 | return false; |
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98 | } |
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99 | |||
100 | public bool lessThan(Functor1 functor) |
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101 | { |
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102 | // Do the equal check first since it is faster. |
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103 | if (!_name.Equals(functor._name)) |
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104 | return _name.lessThan(functor._name); |
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105 | |||
106 | return YP.termLessThan(_arg1, functor._arg1); |
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107 | } |
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108 | |||
109 | public bool ground() |
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110 | { |
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111 | return YP.ground(_arg1); |
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112 | } |
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113 | |||
114 | public void addUniqueVariables(List<Variable> variableSet) |
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115 | { |
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116 | YP.addUniqueVariables(_arg1, variableSet); |
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117 | } |
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118 | |||
119 | public object makeCopy(Variable.CopyStore copyStore) |
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120 | { |
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121 | return new Functor1(_name, YP.makeCopy(_arg1, copyStore)); |
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122 | } |
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123 | } |
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124 | } |