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Viewing changes to Mono.Addins.CecilReflector/Mono.Cecil/Mono.Cecil/MetadataResolver.cs

  • Committer: Bazaar Package Importer
  • Author(s): Jo Shields
  • Date: 2011-04-25 11:11:33 UTC
  • mfrom: (4.1.5 sid)
  • Revision ID: james.westby@ubuntu.com-20110425111133-t05u5p7o5fxx70fu
Tags: 0.6-2
Upload to Unstable

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Mono.Addins.CecilReflector/Mono.Cecil/Mono.Cecil/MetadataResolver.cs
 
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//
 
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// MetadataResolver.cs
 
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//
 
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// Author:
 
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//   Jb Evain (jbevain@gmail.com)
 
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//
 
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// Copyright (c) 2008 - 2010 Jb Evain
 
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//
 
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// Permission is hereby granted, free of charge, to any person obtaining
 
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// a copy of this software and associated documentation files (the
 
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// "Software"), to deal in the Software without restriction, including
 
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// without limitation the rights to use, copy, modify, merge, publish,
 
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// distribute, sublicense, and/or sell copies of the Software, and to
 
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// permit persons to whom the Software is furnished to do so, subject to
 
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// the following conditions:
 
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//
 
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// The above copyright notice and this permission notice shall be
 
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// included in all copies or substantial portions of the Software.
 
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//
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
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//
 
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using System;
 
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using System.Collections.Generic;
 
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using Mono.Collections.Generic;
 
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namespace Mono.Cecil {
 
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        public interface IAssemblyResolver {
 
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                AssemblyDefinition Resolve (AssemblyNameReference name);
 
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                AssemblyDefinition Resolve (AssemblyNameReference name, ReaderParameters parameters);
 
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                AssemblyDefinition Resolve (string fullName);
 
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                AssemblyDefinition Resolve (string fullName, ReaderParameters parameters);
 
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        }
 
43
 
 
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        static class MetadataResolver {
 
45
 
 
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                public static TypeDefinition Resolve (IAssemblyResolver resolver, TypeReference type)
 
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                {
 
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                        type = type.GetElementType ();
 
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                        var scope = type.Scope;
 
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                        switch (scope.MetadataScopeType) {
 
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                        case MetadataScopeType.AssemblyNameReference:
 
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                                var assembly = resolver.Resolve ((AssemblyNameReference) scope);
 
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                                if (assembly == null)
 
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                                        return null;
 
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                                return GetType (assembly.MainModule, type);
 
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                        case MetadataScopeType.ModuleDefinition:
 
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                                return GetType ((ModuleDefinition) scope, type);
 
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                        case MetadataScopeType.ModuleReference:
 
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                                var modules = type.Module.Assembly.Modules;
 
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                                var module_ref = (ModuleReference) scope;
 
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                                for (int i = 0; i < modules.Count; i++) {
 
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                                        var netmodule = modules [i];
 
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                                        if (netmodule.Name == module_ref.Name)
 
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                                                return GetType (netmodule, type);
 
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                                }
 
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                                break;
 
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                        }
 
70
 
 
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                        throw new NotSupportedException ();
 
72
                }
 
73
 
 
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                static TypeDefinition GetType (ModuleDefinition module, TypeReference type)
 
75
                {
 
76
                        if (!type.IsNested)
 
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                                return module.GetType (type.Namespace, type.Name);
 
78
 
 
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                        var declaring_type = type.DeclaringType.Resolve ();
 
80
                        if (declaring_type == null)
 
81
                                return null;
 
82
 
 
83
                        return declaring_type.GetNestedType (type.Name);
 
84
                }
 
85
 
 
86
                public static FieldDefinition Resolve (IAssemblyResolver resolver, FieldReference field)
 
87
                {
 
88
                        var type = Resolve (resolver, field.DeclaringType);
 
89
                        if (type == null)
 
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                                return null;
 
91
 
 
92
                        if (!type.HasFields)
 
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                                return null;
 
94
 
 
95
                        return GetField (resolver, type, field);
 
96
                }
 
97
 
 
98
                static FieldDefinition GetField (IAssemblyResolver resolver, TypeDefinition type, FieldReference reference)
 
99
                {
 
100
                        while (type != null) {
 
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                                var field = GetField (type.Fields, reference);
 
102
                                if (field != null)
 
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                                        return field;
 
104
 
 
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                                if (type.BaseType == null)
 
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                                        return null;
 
107
 
 
108
                                type = Resolve (resolver, type.BaseType);
 
109
                        }
 
110
 
 
111
                        return null;
 
112
                }
 
113
 
 
114
                static FieldDefinition GetField (IList<FieldDefinition> fields, FieldReference reference)
 
115
                {
 
116
                        for (int i = 0; i < fields.Count; i++) {
 
117
                                var field = fields [i];
 
118
 
 
119
                                if (field.Name != reference.Name)
 
120
                                        continue;
 
121
 
 
122
                                if (!AreSame (field.FieldType, reference.FieldType))
 
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                                        continue;
 
124
 
 
125
                                return field;
 
126
                        }
 
127
 
 
128
                        return null;
 
129
                }
 
130
 
 
131
                public static MethodDefinition Resolve (IAssemblyResolver resolver, MethodReference method)
 
132
                {
 
133
                        var type = Resolve (resolver, method.DeclaringType);
 
134
                        if (type == null)
 
135
                                return null;
 
136
 
 
137
                        method = method.GetElementMethod ();
 
138
 
 
139
                        if (!type.HasMethods)
 
140
                                return null;
 
141
 
 
142
                        return GetMethod (resolver, type, method);
 
143
                }
 
144
 
 
145
                static MethodDefinition GetMethod (IAssemblyResolver resolver, TypeDefinition type, MethodReference reference)
 
146
                {
 
147
                        while (type != null) {
 
148
                                var method = GetMethod (type.Methods, reference);
 
149
                                if (method != null)
 
150
                                        return method;
 
151
 
 
152
                                if (type.BaseType == null)
 
153
                                        return null;
 
154
 
 
155
                                type = Resolve (resolver, type.BaseType);
 
156
                        }
 
157
 
 
158
                        return null;
 
159
                }
 
160
 
 
161
                public static MethodDefinition GetMethod (IList<MethodDefinition> methods, MethodReference reference)
 
162
                {
 
163
                        for (int i = 0; i < methods.Count; i++) {
 
164
                                var method = methods [i];
 
165
 
 
166
                                if (method.Name != reference.Name)
 
167
                                        continue;
 
168
 
 
169
                                if (!AreSame (method.ReturnType, reference.ReturnType))
 
170
                                        continue;
 
171
 
 
172
                                if (method.HasParameters != reference.HasParameters)
 
173
                                        continue;
 
174
 
 
175
                                if (!method.HasParameters && !reference.HasParameters)
 
176
                                        return method;
 
177
 
 
178
                                if (!AreSame (method.Parameters, reference.Parameters))
 
179
                                        continue;
 
180
 
 
181
                                return method;
 
182
                        }
 
183
 
 
184
                        return null;
 
185
                }
 
186
 
 
187
                static bool AreSame (Collection<ParameterDefinition> a, Collection<ParameterDefinition> b)
 
188
                {
 
189
                        var count = a.Count;
 
190
 
 
191
                        if (count != b.Count)
 
192
                                return false;
 
193
 
 
194
                        if (count == 0)
 
195
                                return true;
 
196
 
 
197
                        for (int i = 0; i < count; i++)
 
198
                                if (!AreSame (a [i].ParameterType, b [i].ParameterType))
 
199
                                        return false;
 
200
 
 
201
                        return true;
 
202
                }
 
203
 
 
204
                static bool AreSame (TypeSpecification a, TypeSpecification b)
 
205
                {
 
206
                        if (!AreSame (a.ElementType, b.ElementType))
 
207
                                return false;
 
208
 
 
209
                        if (a.IsGenericInstance)
 
210
                                return AreSame ((GenericInstanceType) a, (GenericInstanceType) b);
 
211
 
 
212
                        if (a.IsRequiredModifier || a.IsOptionalModifier)
 
213
                                return AreSame ((IModifierType) a, (IModifierType) b);
 
214
 
 
215
                        if (a.IsArray)
 
216
                                return AreSame ((ArrayType) a, (ArrayType) b);
 
217
 
 
218
                        return true;
 
219
                }
 
220
 
 
221
                static bool AreSame (ArrayType a, ArrayType b)
 
222
                {
 
223
                        if (a.Rank != b.Rank)
 
224
                                return false;
 
225
 
 
226
                        // TODO: dimensions
 
227
 
 
228
                        return true;
 
229
                }
 
230
 
 
231
                static bool AreSame (IModifierType a, IModifierType b)
 
232
                {
 
233
                        return AreSame (a.ModifierType, b.ModifierType);
 
234
                }
 
235
 
 
236
                static bool AreSame (GenericInstanceType a, GenericInstanceType b)
 
237
                {
 
238
                        if (!a.HasGenericArguments)
 
239
                                return !b.HasGenericArguments;
 
240
 
 
241
                        if (!b.HasGenericArguments)
 
242
                                return false;
 
243
 
 
244
                        if (a.GenericArguments.Count != b.GenericArguments.Count)
 
245
                                return false;
 
246
 
 
247
                        for (int i = 0; i < a.GenericArguments.Count; i++)
 
248
                                if (!AreSame (a.GenericArguments [i], b.GenericArguments [i]))
 
249
                                        return false;
 
250
 
 
251
                        return true;
 
252
                }
 
253
 
 
254
                static bool AreSame (GenericParameter a, GenericParameter b)
 
255
                {
 
256
                        return a.Position == b.Position;
 
257
                }
 
258
 
 
259
                static bool AreSame (TypeReference a, TypeReference b)
 
260
                {
 
261
                        if (a.etype != b.etype)
 
262
                                return false;
 
263
 
 
264
                        if (a.IsGenericParameter)
 
265
                                return AreSame ((GenericParameter) a, (GenericParameter) b);
 
266
 
 
267
                        if (a.IsTypeSpecification ())
 
268
                                return AreSame ((TypeSpecification) a, (TypeSpecification) b);
 
269
 
 
270
                        return a.FullName == b.FullName;
 
271
                }
 
272
        }
 
273
}