3 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
5 // Permission is hereby granted, free of charge, to any person obtaining
6 // a copy of this software and associated documentation files (the
7 // "Software"), to deal in the Software without restriction, including
8 // without limitation the rights to use, copy, modify, merge, publish,
9 // distribute, sublicense, and/or sell copies of the Software, and to
10 // permit persons to whom the Software is furnished to do so, subject to
11 // the following conditions:
13 // The above copyright notice and this permission notice shall be
14 // included in all copies or substantial portions of the Software.
16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 // System.Reflection.Emit/CustomAttributeBuilder.cs
29 // Paolo Molaro (lupus@ximian.com)
31 // (C) 2001 Ximian, Inc. http://www.ximian.com
35 using System.Reflection;
36 using System.Reflection.Emit;
37 using System.Runtime.CompilerServices;
38 using System.Runtime.InteropServices;
40 namespace System.Reflection.Emit {
42 [ComDefaultInterface (typeof (_CustomAttributeBuilder))]
43 [ClassInterface (ClassInterfaceType.None)]
44 public class CustomAttributeBuilder : _CustomAttributeBuilder {
48 internal ConstructorInfo Ctor {
52 internal byte[] Data {
56 [MethodImplAttribute(MethodImplOptions.InternalCall)]
57 static extern byte[] GetBlob(Assembly asmb, ConstructorInfo con, object[] constructorArgs, PropertyInfo[] namedProperties, object[] propertyValues, FieldInfo[] namedFields, object[] fieldValues);
59 internal CustomAttributeBuilder( ConstructorInfo con, byte[] cdata) {
61 data = (byte[])cdata.Clone ();
62 /* should we check that the user supplied data is correct? */
65 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs)
67 Initialize (con, constructorArgs, new PropertyInfo [0], new object [0],
68 new FieldInfo [0], new object [0]);
70 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
71 FieldInfo[] namedFields, object[] fieldValues)
73 Initialize (con, constructorArgs, new PropertyInfo [0], new object [0],
74 namedFields, fieldValues);
76 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
77 PropertyInfo[] namedProperties, object[] propertyValues)
79 Initialize (con, constructorArgs, namedProperties, propertyValues, new FieldInfo [0],
82 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
83 PropertyInfo[] namedProperties, object[] propertyValues,
84 FieldInfo[] namedFields, object[] fieldValues)
86 Initialize (con, constructorArgs, namedProperties, propertyValues, namedFields, fieldValues);
89 private bool IsValidType (Type t)
91 /* FIXME: Add more checks */
92 if (t.IsArray && t.GetArrayRank () > 1)
97 private void Initialize (ConstructorInfo con, object [] constructorArgs,
98 PropertyInfo [] namedProperties, object [] propertyValues,
99 FieldInfo [] namedFields, object [] fieldValues)
103 throw new ArgumentNullException ("con");
104 if (constructorArgs == null)
105 throw new ArgumentNullException ("constructorArgs");
106 if (namedProperties == null)
107 throw new ArgumentNullException ("namedProperties");
108 if (propertyValues == null)
109 throw new ArgumentNullException ("propertyValues");
110 if (namedFields == null)
111 throw new ArgumentNullException ("namedFields");
112 if (fieldValues == null)
113 throw new ArgumentNullException ("fieldValues");
114 if (con.GetParameterCount () != constructorArgs.Length)
115 throw new ArgumentException ("Parameter count does not match " +
116 "passed in argument value count.");
117 if (namedProperties.Length != propertyValues.Length)
118 throw new ArgumentException ("Array lengths must be the same.",
119 "namedProperties, propertyValues");
120 if (namedFields.Length != fieldValues.Length)
121 throw new ArgumentException ("Array lengths must be the same.",
122 "namedFields, fieldValues");
123 if ((con.Attributes & MethodAttributes.Static) == MethodAttributes.Static ||
124 (con.Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private)
125 throw new ArgumentException ("Cannot have private or static constructor.");
127 Type atype = ctor.DeclaringType;
130 foreach (FieldInfo fi in namedFields) {
131 Type t = fi.DeclaringType;
132 if (!IsValidType (t))
133 throw new ArgumentException ("Field '" + fi.Name + "' does not have a valid type.");
134 if ((atype != t) && (!t.IsSubclassOf (atype)) && (!atype.IsSubclassOf (t)))
135 throw new ArgumentException ("Field '" + fi.Name + "' does not belong to the same class as the constructor");
136 // FIXME: Check enums and TypeBuilders as well
137 if (fieldValues [i] != null)
138 // IsEnum does not seem to work on TypeBuilders
139 if (!(fi.FieldType is TypeBuilder) && !fi.FieldType.IsEnum && !fi.FieldType.IsInstanceOfType (fieldValues [i])) {
141 // mcs allways uses object[] for array types and
142 // MS.NET allows this
144 if (!fi.FieldType.IsArray)
145 throw new ArgumentException ("Value of field '" + fi.Name + "' does not match field type: " + fi.FieldType);
151 foreach (PropertyInfo pi in namedProperties) {
153 throw new ArgumentException ("Property '" + pi.Name + "' does not have a setter.");
154 Type t = pi.DeclaringType;
155 if (!IsValidType (t))
156 throw new ArgumentException ("Property '" + pi.Name + "' does not have a valid type.");
157 if ((atype != t) && (!t.IsSubclassOf (atype)) && (!atype.IsSubclassOf (t)))
158 throw new ArgumentException ("Property '" + pi.Name + "' does not belong to the same class as the constructor");
159 if (propertyValues [i] != null) {
160 if (!(pi.PropertyType is TypeBuilder) && !pi.PropertyType.IsEnum && !pi.PropertyType.IsInstanceOfType (propertyValues [i]))
161 if (!pi.PropertyType.IsArray)
162 throw new ArgumentException ("Value of property '" + pi.Name + "' does not match property type: " + pi.PropertyType + " -> " + propertyValues [i]);
168 foreach (ParameterInfo pi in GetParameters (con)) {
170 Type paramType = pi.ParameterType;
171 if (!IsValidType (paramType))
172 throw new ArgumentException ("Argument " + i + " does not have a valid type.");
173 if (constructorArgs [i] != null)
174 if (!(paramType is TypeBuilder) && !paramType.IsEnum && !paramType.IsInstanceOfType (constructorArgs [i]))
175 if (!paramType.IsArray)
176 throw new ArgumentException ("Value of argument " + i + " does not match parameter type: " + paramType + " -> " + constructorArgs [i]);
181 data = GetBlob (atype.Assembly, con, constructorArgs, namedProperties, propertyValues, namedFields, fieldValues);
185 internal static int decode_len (byte[] data, int pos, out int rpos) {
187 if ((data [pos] & 0x80) == 0) {
188 len = (int)(data [pos++] & 0x7f);
189 } else if ((data [pos] & 0x40) == 0) {
190 len = ((data [pos] & 0x3f) << 8) + data [pos + 1];
193 len = ((data [pos] & 0x1f) << 24) + (data [pos + 1] << 16) + (data [pos + 2] << 8) + data [pos + 3];
200 internal static string string_from_bytes (byte[] data, int pos, int len)
202 return System.Text.Encoding.UTF8.GetString(data, pos, len);
205 internal string string_arg ()
208 int len = decode_len (data, pos, out pos);
209 return string_from_bytes (data, pos, len);
212 internal static UnmanagedMarshal get_umarshal (CustomAttributeBuilder customBuilder, bool is_field) {
213 byte[] data = customBuilder.Data;
214 UnmanagedType subtype = (UnmanagedType)0x50; /* NATIVE_MAX */
216 int sizeParamIndex = -1;
217 bool hasSize = false;
219 int utype; /* the (stupid) ctor takes a short or an enum ... */
220 string marshalTypeName = null;
221 Type marshalTypeRef = null;
222 string marshalCookie = String.Empty;
223 utype = (int)data [2];
224 utype |= ((int)data [3]) << 8;
226 string first_type_name = GetParameters (customBuilder.Ctor) [0].ParameterType.FullName;
228 if (first_type_name == "System.Int16")
230 int nnamed = (int)data [pos++];
231 nnamed |= ((int)data [pos++]) << 8;
233 for (int i = 0; i < nnamed; ++i) {
234 int paramType; // What is this ?
236 /* Skip field/property signature */
239 paramType = ((int)data [pos++]);
240 if (paramType == 0x55) {
241 /* enums, the value is preceeded by the type */
242 int len2 = decode_len (data, pos, out pos);
243 string_from_bytes (data, pos, len2);
246 int len = decode_len (data, pos, out pos);
247 string named_name = string_from_bytes (data, pos, len);
250 switch (named_name) {
252 value = (int)data [pos++];
253 value |= ((int)data [pos++]) << 8;
254 value |= ((int)data [pos++]) << 16;
255 value |= ((int)data [pos++]) << 24;
256 subtype = (UnmanagedType)value;
259 value = (int)data [pos++];
260 value |= ((int)data [pos++]) << 8;
261 value |= ((int)data [pos++]) << 16;
262 value |= ((int)data [pos++]) << 24;
266 case "SafeArraySubType":
267 value = (int)data[pos++];
268 value |= ((int)data[pos++]) << 8;
269 value |= ((int)data[pos++]) << 16;
270 value |= ((int)data[pos++]) << 24;
271 subtype = (UnmanagedType)value;
273 case "IidParameterIndex":
276 case "SafeArrayUserDefinedSubType":
277 len = decode_len (data, pos, out pos);
278 string_from_bytes (data, pos, len);
281 case "SizeParamIndex":
282 value = (int)data [pos++];
283 value |= ((int)data [pos++]) << 8;
284 sizeParamIndex = value;
288 len = decode_len (data, pos, out pos);
289 marshalTypeName = string_from_bytes (data, pos, len);
292 case "MarshalTypeRef":
293 len = decode_len (data, pos, out pos);
294 marshalTypeName = string_from_bytes (data, pos, len);
295 marshalTypeRef = Type.GetType (marshalTypeName);
298 case "MarshalCookie":
299 len = decode_len (data, pos, out pos);
300 marshalCookie = string_from_bytes (data, pos, len);
304 throw new Exception ("Unknown MarshalAsAttribute field: " + named_name);
308 switch ((UnmanagedType)utype) {
309 case UnmanagedType.LPArray:
311 return UnmanagedMarshal.DefineLPArrayInternal (subtype, sizeConst, sizeParamIndex);
313 return UnmanagedMarshal.DefineLPArray (subtype);
314 case UnmanagedType.SafeArray:
315 return UnmanagedMarshal.DefineSafeArray (subtype);
316 case UnmanagedType.ByValArray:
318 throw new ArgumentException ("Specified unmanaged type is only valid on fields");
320 return UnmanagedMarshal.DefineByValArray (sizeConst);
321 case UnmanagedType.ByValTStr:
322 return UnmanagedMarshal.DefineByValTStr (sizeConst);
323 case UnmanagedType.CustomMarshaler:
324 return UnmanagedMarshal.DefineCustom (marshalTypeRef, marshalCookie, marshalTypeName, Guid.Empty);
326 return UnmanagedMarshal.DefineUnmanagedMarshal ((UnmanagedType)utype);
330 static Type elementTypeToType (int elementType) {
331 /* Partition II, section 23.1.16 */
332 switch (elementType) {
334 return typeof (bool);
336 return typeof (char);
338 return typeof (sbyte);
340 return typeof (byte);
342 return typeof (short);
344 return typeof (ushort);
348 return typeof (uint);
350 return typeof (long);
352 return typeof (ulong);
354 return typeof (float);
356 return typeof (double);
358 return typeof (string);
360 throw new Exception ("Unknown element type '" + elementType + "'");
364 static object decode_cattr_value (Type t, byte[] data, int pos, out int rpos) {
365 switch (Type.GetTypeCode (t)) {
366 case TypeCode.String:
367 if (data [pos] == 0xff) {
371 int len = decode_len (data, pos, out pos);
373 return string_from_bytes (data, pos, len);
376 return data [pos] + (data [pos + 1] << 8) + (data [pos + 2] << 16) + (data [pos + 3] << 24);
377 case TypeCode.Boolean:
379 return (data [pos] == 0) ? false : true;
380 case TypeCode.Object:
381 int subtype = data [pos];
384 if (subtype >= 0x02 && subtype <= 0x0e)
385 return decode_cattr_value (elementTypeToType (subtype), data, pos, out rpos);
387 throw new Exception ("Subtype '" + subtype + "' of type object not yet handled in decode_cattr_value");
389 throw new Exception ("FIXME: Type " + t + " not yet handled in decode_cattr_value.");
393 internal struct CustomAttributeInfo {
394 public ConstructorInfo ctor;
395 public object[] ctorArgs;
396 public string[] namedParamNames;
397 public object[] namedParamValues;
400 internal static CustomAttributeInfo decode_cattr (CustomAttributeBuilder customBuilder) {
401 byte[] data = customBuilder.Data;
402 ConstructorInfo ctor = customBuilder.Ctor;
405 CustomAttributeInfo info = new CustomAttributeInfo ();
409 throw new Exception ("Custom attr length is only '" + data.Length + "'");
410 if ((data [0] != 0x1) || (data [1] != 0x00))
411 throw new Exception ("Prolog invalid");
414 ParameterInfo [] pi = GetParameters (ctor);
416 info.ctorArgs = new object [pi.Length];
417 for (int i = 0; i < pi.Length; ++i)
418 info.ctorArgs [i] = decode_cattr_value (pi [i].ParameterType, data, pos, out pos);
420 int num_named = data [pos] + (data [pos + 1] * 256);
423 info.namedParamNames = new string [num_named];
424 info.namedParamValues = new object [num_named];
425 for (int i = 0; i < num_named; ++i) {
426 int named_type = data [pos++];
427 int data_type = data [pos++];
428 string enum_type_name = null;
430 if (data_type == 0x55) {
431 int len2 = decode_len (data, pos, out pos);
432 enum_type_name = string_from_bytes (data, pos, len2);
436 int len = decode_len (data, pos, out pos);
437 string name = string_from_bytes (data, pos, len);
438 info.namedParamNames [i] = name;
441 if (named_type == 0x53) {
443 FieldInfo fi = ctor.DeclaringType.GetField (name, BindingFlags.Public|BindingFlags.NonPublic|BindingFlags.Instance);
445 throw new Exception ("Custom attribute type '" + ctor.DeclaringType + "' doesn't contain a field named '" + name + "'");
447 object val = decode_cattr_value (fi.FieldType, data, pos, out pos);
448 if (enum_type_name != null) {
449 Type enumType = Type.GetType (enum_type_name);
450 val = Enum.ToObject (enumType, val);
453 info.namedParamValues [i] = val;
457 throw new Exception ("Unknown named type: " + named_type);
463 void _CustomAttributeBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
465 throw new NotImplementedException ();
468 void _CustomAttributeBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
470 throw new NotImplementedException ();
473 void _CustomAttributeBuilder.GetTypeInfoCount (out uint pcTInfo)
475 throw new NotImplementedException ();
478 void _CustomAttributeBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
480 throw new NotImplementedException ();
483 static ParameterInfo [] GetParameters (ConstructorInfo ctor)
485 ConstructorBuilder cb = ctor as ConstructorBuilder;
487 return cb.GetParametersInternal ();
488 return ctor.GetParameters ();