1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/*
Copyright (C) 2008-2012 Jeroen Frijters
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jeroen Frijters
jeroen@frijters.net
*/
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
using IKVM.Reflection.Emit;
using IKVM.Reflection.Reader;
using IKVM.Reflection.Writer;
using IKVM.Reflection.Metadata;
namespace IKVM.Reflection
{
public struct FieldMarshal
{
private const UnmanagedType NATIVE_TYPE_MAX = (UnmanagedType)0x50;
public UnmanagedType UnmanagedType;
public UnmanagedType? ArraySubType;
public short? SizeParamIndex;
public int? SizeConst;
public VarEnum? SafeArraySubType;
public Type SafeArrayUserDefinedSubType;
public int? IidParameterIndex;
public string MarshalType;
public string MarshalCookie;
public Type MarshalTypeRef;
internal static bool ReadFieldMarshal(Module module, int token, out FieldMarshal fm)
{
fm = new FieldMarshal();
foreach (int i in module.FieldMarshal.Filter(token))
{
ByteReader blob = module.GetBlob(module.FieldMarshal.records[i].NativeType);
fm.UnmanagedType = (UnmanagedType)blob.ReadCompressedUInt();
if (fm.UnmanagedType == UnmanagedType.LPArray)
{
fm.ArraySubType = (UnmanagedType)blob.ReadCompressedUInt();
if (fm.ArraySubType == NATIVE_TYPE_MAX)
{
fm.ArraySubType = null;
}
if (blob.Length != 0)
{
fm.SizeParamIndex = (short)blob.ReadCompressedUInt();
if (blob.Length != 0)
{
fm.SizeConst = blob.ReadCompressedUInt();
if (blob.Length != 0 && blob.ReadCompressedUInt() == 0)
{
fm.SizeParamIndex = null;
}
}
}
}
else if (fm.UnmanagedType == UnmanagedType.SafeArray)
{
if (blob.Length != 0)
{
fm.SafeArraySubType = (VarEnum)blob.ReadCompressedUInt();
if (blob.Length != 0)
{
fm.SafeArrayUserDefinedSubType = ReadType(module, blob);
}
}
}
else if (fm.UnmanagedType == UnmanagedType.ByValArray)
{
fm.SizeConst = blob.ReadCompressedUInt();
if (blob.Length != 0)
{
fm.ArraySubType = (UnmanagedType)blob.ReadCompressedUInt();
}
}
else if (fm.UnmanagedType == UnmanagedType.ByValTStr)
{
fm.SizeConst = blob.ReadCompressedUInt();
}
else if (fm.UnmanagedType == UnmanagedType.Interface
|| fm.UnmanagedType == UnmanagedType.IDispatch
|| fm.UnmanagedType == UnmanagedType.IUnknown)
{
if (blob.Length != 0)
{
fm.IidParameterIndex = blob.ReadCompressedUInt();
}
}
else if (fm.UnmanagedType == UnmanagedType.CustomMarshaler)
{
blob.ReadCompressedUInt();
blob.ReadCompressedUInt();
fm.MarshalType = ReadString(blob);
fm.MarshalCookie = ReadString(blob);
TypeNameParser parser = TypeNameParser.Parse(fm.MarshalType, false);
if (!parser.Error)
{
fm.MarshalTypeRef = parser.GetType(module.universe, module, false, fm.MarshalType, false, false);
}
}
return true;
}
return false;
}
internal static void SetMarshalAsAttribute(ModuleBuilder module, int token, CustomAttributeBuilder attribute)
{
attribute = attribute.DecodeBlob(module.Assembly);
FieldMarshalTable.Record rec = new FieldMarshalTable.Record();
rec.Parent = token;
rec.NativeType = WriteMarshallingDescriptor(module, attribute);
module.FieldMarshal.AddRecord(rec);
}
private static int WriteMarshallingDescriptor(ModuleBuilder module, CustomAttributeBuilder attribute)
{
UnmanagedType unmanagedType;
object val = attribute.GetConstructorArgument(0);
if (val is short)
{
unmanagedType = (UnmanagedType)(short)val;
}
else if (val is int)
{
unmanagedType = (UnmanagedType)(int)val;
}
else
{
unmanagedType = (UnmanagedType)val;
}
ByteBuffer bb = new ByteBuffer(5);
bb.WriteCompressedUInt((int)unmanagedType);
if (unmanagedType == UnmanagedType.LPArray)
{
UnmanagedType arraySubType = attribute.GetFieldValue<UnmanagedType>("ArraySubType") ?? NATIVE_TYPE_MAX;
bb.WriteCompressedUInt((int)arraySubType);
int? sizeParamIndex = attribute.GetFieldValue<short>("SizeParamIndex");
int? sizeConst = attribute.GetFieldValue<int>("SizeConst");
if (sizeParamIndex != null)
{
bb.WriteCompressedUInt(sizeParamIndex.Value);
if (sizeConst != null)
{
bb.WriteCompressedUInt(sizeConst.Value);
bb.WriteCompressedUInt(1); // flag that says that SizeParamIndex was specified
}
}
else if (sizeConst != null)
{
bb.WriteCompressedUInt(0); // SizeParamIndex
bb.WriteCompressedUInt(sizeConst.Value);
bb.WriteCompressedUInt(0); // flag that says that SizeParamIndex was not specified
}
}
else if (unmanagedType == UnmanagedType.SafeArray)
{
VarEnum? safeArraySubType = attribute.GetFieldValue<VarEnum>("SafeArraySubType");
if (safeArraySubType != null)
{
bb.WriteCompressedUInt((int)safeArraySubType);
Type safeArrayUserDefinedSubType = (Type)attribute.GetFieldValue("SafeArrayUserDefinedSubType");
if (safeArrayUserDefinedSubType != null)
{
WriteType(module, bb, safeArrayUserDefinedSubType);
}
}
}
else if (unmanagedType == UnmanagedType.ByValArray)
{
bb.WriteCompressedUInt(attribute.GetFieldValue<int>("SizeConst") ?? 1);
UnmanagedType? arraySubType = attribute.GetFieldValue<UnmanagedType>("ArraySubType");
if (arraySubType != null)
{
bb.WriteCompressedUInt((int)arraySubType);
}
}
else if (unmanagedType == UnmanagedType.ByValTStr)
{
bb.WriteCompressedUInt(attribute.GetFieldValue<int>("SizeConst").Value);
}
else if (unmanagedType == UnmanagedType.Interface
|| unmanagedType == UnmanagedType.IDispatch
|| unmanagedType == UnmanagedType.IUnknown)
{
int? iidParameterIndex = attribute.GetFieldValue<int>("IidParameterIndex");
if (iidParameterIndex != null)
{
bb.WriteCompressedUInt(iidParameterIndex.Value);
}
}
else if (unmanagedType == UnmanagedType.CustomMarshaler)
{
bb.WriteCompressedUInt(0);
bb.WriteCompressedUInt(0);
string marshalType = (string)attribute.GetFieldValue("MarshalType");
if (marshalType != null)
{
WriteString(bb, marshalType);
}
else
{
WriteType(module, bb, (Type)attribute.GetFieldValue("MarshalTypeRef"));
}
WriteString(bb, (string)attribute.GetFieldValue("MarshalCookie") ?? "");
}
return module.Blobs.Add(bb);
}
private static Type ReadType(Module module, ByteReader br)
{
string str = ReadString(br);
if (str == "")
{
return null;
}
return module.Assembly.GetType(str) ?? module.universe.GetType(str, true);
}
private static void WriteType(Module module, ByteBuffer bb, Type type)
{
WriteString(bb, type.Assembly == module.Assembly ? type.FullName : type.AssemblyQualifiedName);
}
private static string ReadString(ByteReader br)
{
return Encoding.UTF8.GetString(br.ReadBytes(br.ReadCompressedUInt()));
}
private static void WriteString(ByteBuffer bb, string str)
{
byte[] buf = Encoding.UTF8.GetBytes(str);
bb.WriteCompressedUInt(buf.Length);
bb.Write(buf);
}
}
}
|
