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author | Melanie Thielker | 2008-09-26 16:11:53 +0000 |
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committer | Melanie Thielker | 2008-09-26 16:11:53 +0000 |
commit | d8c470343e50b342024491219bd43678a24b4a03 (patch) | |
tree | 2ee37a53c9d976e4b88706a1634c5ffdb69b0aae /OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/Atom.cs | |
parent | After the last commit, the old Common assembly was still being loaded. (diff) | |
download | opensim-SC-d8c470343e50b342024491219bd43678a24b4a03.zip opensim-SC-d8c470343e50b342024491219bd43678a24b4a03.tar.gz opensim-SC-d8c470343e50b342024491219bd43678a24b4a03.tar.bz2 opensim-SC-d8c470343e50b342024491219bd43678a24b4a03.tar.xz |
Compiler Connection! One world, one compiler!
Diffstat (limited to 'OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/Atom.cs')
-rw-r--r-- | OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/Atom.cs | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/Atom.cs b/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/Atom.cs deleted file mode 100644 index 0537f7d..0000000 --- a/OpenSim/Region/ScriptEngine/DotNetEngine/Compiler/YieldProlog/Atom.cs +++ /dev/null | |||
@@ -1,218 +0,0 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2007-2008, Jeff Thompson | ||
3 | * | ||
4 | * All rights reserved. | ||
5 | * | ||
6 | * Redistribution and use in source and binary forms, with or without | ||
7 | * modification, are permitted provided that the following conditions are met: | ||
8 | * | ||
9 | * * Redistributions of source code must retain the above copyright | ||
10 | * notice, this list of conditions and the following disclaimer. | ||
11 | * * Redistributions in binary form must reproduce the above copyright | ||
12 | * notice, this list of conditions and the following disclaimer in the | ||
13 | * documentation and/or other materials provided with the distribution. | ||
14 | * * Neither the name of the copyright holder nor the names of its contributors | ||
15 | * may be used to endorse or promote products derived from this software | ||
16 | * without specific prior written permission. | ||
17 | * | ||
18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
21 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | ||
22 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
23 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
24 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
25 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
26 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
27 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
28 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
29 | */ | ||
30 | |||
31 | using System; | ||
32 | using System.Collections.Generic; | ||
33 | using System.Text; | ||
34 | |||
35 | namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.YieldProlog | ||
36 | { | ||
37 | public class Atom : IUnifiable | ||
38 | { | ||
39 | private static Dictionary<string, Atom> _atomStore = new Dictionary<string, Atom>(); | ||
40 | public readonly string _name; | ||
41 | public readonly Atom _module; | ||
42 | |||
43 | /// <summary> | ||
44 | /// You should not call this constructor, but use Atom.a instead. | ||
45 | /// </summary> | ||
46 | /// <param name="name"></param> | ||
47 | /// <param name="module"></param> | ||
48 | private Atom(string name, Atom module) | ||
49 | { | ||
50 | _name = name; | ||
51 | _module = module; | ||
52 | } | ||
53 | |||
54 | /// <summary> | ||
55 | /// Return the unique Atom object for name where module is null. You should use this to create | ||
56 | /// an Atom instead of calling the Atom constructor. | ||
57 | /// </summary> | ||
58 | /// <param name="name"></param> | ||
59 | /// <returns></returns> | ||
60 | public static Atom a(string name) | ||
61 | { | ||
62 | Atom atom; | ||
63 | if (!_atomStore.TryGetValue(name, out atom)) | ||
64 | { | ||
65 | atom = new Atom(name, null); | ||
66 | _atomStore[name] = atom; | ||
67 | } | ||
68 | return atom; | ||
69 | } | ||
70 | |||
71 | /// <summary> | ||
72 | /// Return an Atom object with the name and module. If module is null or Atom.NIL, | ||
73 | /// this behaves like Atom.a(name) and returns the unique object where the module is null. | ||
74 | /// If module is not null or Atom.NIL, this may or may not be the same object as another Atom | ||
75 | /// with the same name and module. | ||
76 | /// </summary> | ||
77 | /// <param name="name"></param> | ||
78 | /// <param name="module"></param> | ||
79 | /// <returns></returns> | ||
80 | public static Atom a(string name, Atom module) | ||
81 | { | ||
82 | if (module == null || module == Atom.NIL) | ||
83 | return a(name); | ||
84 | return new Atom(name, module); | ||
85 | } | ||
86 | |||
87 | /// <summary> | ||
88 | /// If Obj is an Atom unify its _module with Module. If the Atom's _module is null, use Atom.NIL. | ||
89 | /// </summary> | ||
90 | /// <param name="Atom"></param> | ||
91 | /// <param name="Module"></param> | ||
92 | /// <returns></returns> | ||
93 | public static IEnumerable<bool> module(object Obj, object Module) | ||
94 | { | ||
95 | Obj = YP.getValue(Obj); | ||
96 | if (Obj is Atom) | ||
97 | { | ||
98 | if (((Atom)Obj)._module == null) | ||
99 | return YP.unify(Module, Atom.NIL); | ||
100 | else | ||
101 | return YP.unify(Module, ((Atom)Obj)._module); | ||
102 | } | ||
103 | return YP.fail(); | ||
104 | } | ||
105 | |||
106 | public static readonly Atom NIL = Atom.a("[]"); | ||
107 | public static readonly Atom DOT = Atom.a("."); | ||
108 | public static readonly Atom F = Atom.a("f"); | ||
109 | public static readonly Atom SLASH = Atom.a("/"); | ||
110 | public static readonly Atom HAT = Atom.a("^"); | ||
111 | public static readonly Atom RULE = Atom.a(":-"); | ||
112 | |||
113 | public IEnumerable<bool> unify(object arg) | ||
114 | { | ||
115 | arg = YP.getValue(arg); | ||
116 | if (arg is Atom) | ||
117 | return Equals(arg) ? YP.succeed() : YP.fail(); | ||
118 | else if (arg is Variable) | ||
119 | return ((Variable)arg).unify(this); | ||
120 | else | ||
121 | return YP.fail(); | ||
122 | } | ||
123 | |||
124 | public void addUniqueVariables(List<Variable> variableSet) | ||
125 | { | ||
126 | // Atom does not contain variables. | ||
127 | } | ||
128 | |||
129 | public object makeCopy(Variable.CopyStore copyStore) | ||
130 | { | ||
131 | // Atom does not contain variables that need to be copied. | ||
132 | return this; | ||
133 | } | ||
134 | |||
135 | public bool termEqual(object term) | ||
136 | { | ||
137 | return Equals(YP.getValue(term)); | ||
138 | } | ||
139 | |||
140 | public bool ground() | ||
141 | { | ||
142 | // Atom is always ground. | ||
143 | return true; | ||
144 | } | ||
145 | |||
146 | public override bool Equals(object obj) | ||
147 | { | ||
148 | if (obj is Atom) | ||
149 | { | ||
150 | if (_module == null && ((Atom)obj)._module == null) | ||
151 | // When _declaringClass is null, we always use an identical object from _atomStore. | ||
152 | return this == obj; | ||
153 | // Otherwise, ignore _declaringClass and do a normal string compare on the _name. | ||
154 | return _name == ((Atom)obj)._name; | ||
155 | } | ||
156 | return false; | ||
157 | } | ||
158 | |||
159 | public override string ToString() | ||
160 | { | ||
161 | return _name; | ||
162 | } | ||
163 | |||
164 | public override int GetHashCode() | ||
165 | { | ||
166 | // Debug: need to check _declaringClass. | ||
167 | return _name.GetHashCode(); | ||
168 | } | ||
169 | |||
170 | public string toQuotedString() | ||
171 | { | ||
172 | if (_name.Length == 0) | ||
173 | return "''"; | ||
174 | else if (this == Atom.NIL) | ||
175 | return "[]"; | ||
176 | |||
177 | StringBuilder result = new StringBuilder(_name.Length); | ||
178 | bool useQuotes = false; | ||
179 | foreach (char c in _name) | ||
180 | { | ||
181 | int cInt = (int)c; | ||
182 | if (c == '\'') | ||
183 | { | ||
184 | result.Append("''"); | ||
185 | useQuotes = true; | ||
186 | } | ||
187 | else if (c == '_' || cInt >= (int)'a' && cInt <= (int)'z' || | ||
188 | cInt >= (int)'A' && cInt <= (int)'Z' || cInt >= (int)'0' && cInt <= (int)'9') | ||
189 | result.Append(c); | ||
190 | else | ||
191 | { | ||
192 | // Debug: Need to handle non-printable chars. | ||
193 | result.Append(c); | ||
194 | useQuotes = true; | ||
195 | } | ||
196 | } | ||
197 | |||
198 | if (!useQuotes && (int)_name[0] >= (int)'a' && (int)_name[0] <= (int)'z') | ||
199 | return result.ToString(); | ||
200 | else | ||
201 | { | ||
202 | // Surround in single quotes. | ||
203 | result.Append('\''); | ||
204 | return "'" + result; | ||
205 | } | ||
206 | } | ||
207 | |||
208 | /// <summary> | ||
209 | /// Return true if _name is lexicographically less than atom._name. | ||
210 | /// </summary> | ||
211 | /// <param name="atom"></param> | ||
212 | /// <returns></returns> | ||
213 | public bool lessThan(Atom atom) | ||
214 | { | ||
215 | return _name.CompareTo(atom._name) < 0; | ||
216 | } | ||
217 | } | ||
218 | } | ||