2006-02-15 Martin Baulig <martin@ximian.com>
[mono.git] / mcs / class / corlib / System.Reflection.Emit / MethodBuilder.cs
old mode 100755 (executable)
new mode 100644 (file)
index ac5bc67..ba9574b
@@ -1,4 +1,3 @@
-
 //
 // System.Reflection.Emit/MethodBuilder.cs
 //
@@ -8,6 +7,29 @@
 // (C) 2001 Ximian, Inc.  http://www.ximian.com
 //
 
+//
+// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
 using System;
 using System.Reflection;
 using System.Reflection.Emit;
@@ -16,10 +38,15 @@ using System.Security;
 using System.Security.Permissions;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using System.Diagnostics.SymbolStore;
 
 namespace System.Reflection.Emit {
-
-       public sealed class MethodBuilder : MethodInfo {
+#if NET_2_0
+       [ComVisible (true)]
+       [ComDefaultInterface (typeof (_MethodBuilder))]
+#endif
+       [ClassInterface (ClassInterfaceType.None)]
+       public sealed class MethodBuilder : MethodInfo, _MethodBuilder {
                private RuntimeMethodHandle mhandle;
                private Type rtype;
                private Type[] parameters;
@@ -35,11 +62,17 @@ namespace System.Reflection.Emit {
                private MethodInfo override_method;
                private string pi_dll;
                private string pi_entry;
-               private CharSet ncharset;
+               private CharSet charset;
+               private uint extra_flags; /* this encodes set_last_error etc */
                private CallingConvention native_cc;
                private CallingConventions call_conv;
                private bool init_locals = true;
-               private MonoGenericParam[] generic_params;
+               private IntPtr generic_container;
+#if NET_2_0 || BOOTSTRAP_NET_2_0
+               private GenericTypeParameterBuilder[] generic_params;
+#else
+               private Object generic_params; /* so offsets are the same */
+#endif
                private Type[] returnModReq;
                private Type[] returnModOpt;
                private Type[][] paramModReq;
@@ -60,6 +93,10 @@ namespace System.Reflection.Emit {
                        if ((attributes & MethodAttributes.Static) == 0)
                                this.call_conv |= CallingConventions.HasThis;
                        if (parameterTypes != null) {
+                               for (int i = 0; i < parameterTypes.Length; ++i)
+                                       if (parameterTypes [i] == null)
+                                               throw new ArgumentException ("Elements of the parameterTypes array cannot be null", "parameterTypes");
+
                                this.parameters = new Type [parameterTypes.Length];
                                System.Array.Copy (parameterTypes, this.parameters, parameterTypes.Length);
                        }
@@ -75,7 +112,7 @@ namespace System.Reflection.Emit {
                        pi_dll = dllName;
                        pi_entry = entryName;
                        native_cc = nativeCConv;
-                       ncharset = nativeCharset;
+                       charset = nativeCharset;
                }
 
                public bool InitLocals {
@@ -113,6 +150,34 @@ namespace System.Reflection.Emit {
                        }
                }
 
+               /* Used by mcs */
+               internal bool BestFitMapping {
+                       set {
+                               extra_flags = (uint) ((extra_flags & ~0x30) | (value ? 0x10 : 0x20));
+                       }
+               }
+
+               /* Used by mcs */
+               internal bool ThrowOnUnmappableChar {
+                       set {
+                               extra_flags = (uint) ((extra_flags & ~0x3000) | (value ? 0x1000 : 0x2000));
+                       }
+               }
+
+               /* Used by mcs */
+               internal bool ExactSpelling {
+                       set {
+                               extra_flags = (uint) ((extra_flags & ~0x01) | (value ? 0x01 : 0x00));
+                       }
+               }
+
+               /* Used by mcs */
+               internal bool SetLastError {
+                       set {
+                               extra_flags = (uint) ((extra_flags & ~0x40) | (value ? 0x40 : 0x00));
+                       }
+               }
+
                public MethodToken GetToken() {
                        return new MethodToken(0x06000000 | table_idx);
                }
@@ -124,6 +189,8 @@ namespace System.Reflection.Emit {
                        return iattrs;
                }
                public override ParameterInfo[] GetParameters() {
+                       if (!type.is_created)
+                               throw NotSupported ();
                        if (parameters == null)
                                return null;
 
@@ -148,7 +215,7 @@ namespace System.Reflection.Emit {
 
                public void CreateMethodBody( byte[] il, int count) {
                        if ((il != null) && ((count < 0) || (count > il.Length)))
-                               throw new ArgumentException ("Index was out of range.  Must be non-negative and less than the size of the collection.");
+                               throw new ArgumentOutOfRangeException ("Index was out of range.  Must be non-negative and less than the size of the collection.");
 
                        if ((code != null) || type.is_created)
                                throw new InvalidOperationException ("Type definition of the method is complete.");
@@ -168,11 +235,24 @@ namespace System.Reflection.Emit {
                        throw NotSupported ();
                }
                public override object[] GetCustomAttributes( bool inherit) {
-                       throw NotSupported ();
+                       /*
+                        * On MS.NET, this always returns not_supported, but we can't do this
+                        * since there would be no way to obtain custom attributes of 
+                        * dynamically created ctors.
+                        */
+                       if (type.is_created)
+                               return MonoCustomAttrs.GetCustomAttributes (this, inherit);
+                       else
+                               throw NotSupported ();
                }
+
                public override object[] GetCustomAttributes( Type attributeType, bool inherit) {
-                       throw NotSupported ();
+                       if (type.is_created)
+                               return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
+                       else
+                               throw NotSupported ();
                }
+
                public ILGenerator GetILGenerator () {
                        return GetILGenerator (64);
                }
@@ -191,14 +271,14 @@ namespace System.Reflection.Emit {
                
                public ParameterBuilder DefineParameter (int position, ParameterAttributes attributes, string strParamName)
                {
+                       RejectIfCreated ();
+                       
                        //
                        // Extension: Mono allows position == 0 for the return attribute
                        //
                        if ((position < 0) || (position > parameters.Length))
                                throw new ArgumentOutOfRangeException ("position");
 
-                       RejectIfCreated ();
-
                        ParameterBuilder pb = new ParameterBuilder (this, position, attributes, strParamName);
                        if (pinfo == null)
                                pinfo = new ParameterBuilder [parameters.Length + 1];
@@ -207,9 +287,29 @@ namespace System.Reflection.Emit {
                }
 
                internal void fixup () {
+                       if (((attrs & (MethodAttributes.Abstract | MethodAttributes.PinvokeImpl)) == 0) && ((iattrs & (MethodImplAttributes.Runtime | MethodImplAttributes.InternalCall)) == 0)) {
+#if NET_2_0
+                               // do not allow zero length method body on MS.NET 2.0 (and higher)
+                               if (((ilgen == null) || (ILGenerator.Mono_GetCurrentOffset (ilgen) == 0)) && (code == null || code.Length == 0))
+#else
+                               if (((ilgen == null) || (ILGenerator.Mono_GetCurrentOffset (ilgen) == 0)) && (code == null))
+#endif
+                                       throw new InvalidOperationException ("Method '" + Name + "' does not have a method body.");
+                       }
                        if (ilgen != null)
                                ilgen.label_fixup ();
                }
+               
+               internal void GenerateDebugInfo (ISymbolWriter symbolWriter)
+               {
+                       if (ilgen != null && ilgen.HasDebugInfo) {
+                               SymbolToken token = new SymbolToken (GetToken().Token);
+                               symbolWriter.OpenMethod (token);
+                               symbolWriter.SetSymAttribute (token, "__name", System.Text.Encoding.UTF8.GetBytes (Name));
+                               ilgen.GenerateDebugInfo (symbolWriter);
+                               symbolWriter.CloseMethod ();
+                       }
+               }
 
                public void SetCustomAttribute( CustomAttributeBuilder customBuilder) {
                        if (customBuilder == null)
@@ -223,6 +323,59 @@ namespace System.Reflection.Emit {
                                SetImplementationFlags ((MethodImplAttributes)impla);
                                return;
                        }
+                       if (attrname == "System.Runtime.InteropServices.DllImportAttribute") {
+                               CustomAttributeBuilder.CustomAttributeInfo attr = CustomAttributeBuilder.decode_cattr (customBuilder);
+                               bool preserveSig = true;
+
+                               /*
+                                * It would be easier to construct a DllImportAttribute from
+                                * the custom attribute builder, but the DllImportAttribute 
+                                * does not contain all the information required here, ie.
+                                * - some parameters, like BestFitMapping has three values
+                                *   ("on", "off", "missing"), but DllImportAttribute only
+                                *   contains two (on/off).
+                                * - PreserveSig is true by default, while it is false by
+                                *   default in DllImportAttribute.
+                                */
+
+                               pi_dll = (string)attr.ctorArgs [0];
+                               native_cc = System.Runtime.InteropServices.CallingConvention.Winapi;
+
+                               for (int i = 0; i < attr.namedParamNames.Length; ++i) {
+                                       string name = attr.namedParamNames [i];
+                                       object value = attr.namedParamValues [i];
+
+                                       if (name == "CallingConvention")
+                                               native_cc = (CallingConvention)value;
+                                       else if (name == "CharSet")
+                                               charset = (CharSet)value;
+                                       else if (name == "EntryPoint")
+                                               pi_entry = (string)value;
+                                       else if (name == "ExactSpelling")
+                                               ExactSpelling = (bool)value;
+                                       else if (name == "SetLastError")
+                                               SetLastError = (bool)value;
+                                       else if (name == "PreserveSig")
+                                               preserveSig = (bool)value;
+#if NET_1_1
+                                       else if (name == "BestFitMapping")
+                                               BestFitMapping = (bool)value;
+                                       else if (name == "ThrowOnUnmappableChar")
+                                               ThrowOnUnmappableChar = (bool)value;
+#endif
+                               }
+#if NET_2_0
+                       if (attrname == "System.Runtime.CompilerServices.SpecialNameAttribute") {
+                               attrs |= MethodAttributes.SpecialName;
+                               return;
+                       }
+#endif
+
+                               attrs |= MethodAttributes.PinvokeImpl;
+                               if (preserveSig)
+                                       iattrs |= MethodImplAttributes.PreserveSig;
+                               return;
+                       }
                        if (cattrs != null) {
                                CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
                                cattrs.CopyTo (new_array, 0);
@@ -233,6 +386,10 @@ namespace System.Reflection.Emit {
                                cattrs [0] = customBuilder;
                        }
                }
+
+#if NET_2_0
+               [ComVisible (true)]
+#endif
                public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
                        if (con == null)
                                throw new ArgumentNullException ("con");
@@ -272,7 +429,9 @@ namespace System.Reflection.Emit {
                        attrs |= MethodAttributes.HasSecurity;
                }
 
-               [MonoTODO]
+#if NET_2_0
+               [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
+#endif
                public void SetMarshal (UnmanagedMarshal unmanagedMarshal)
                {
                        RejectIfCreated ();
@@ -286,8 +445,24 @@ namespace System.Reflection.Emit {
                        throw new NotImplementedException ();
                }
 
+               public override string ToString()
+               {
+                       return "MethodBuilder [" + type.Name + "::" + name + "]";
+               }
+
+               [MonoTODO]
+               public override bool Equals (object obj)
+               {
+                       return base.Equals (obj);
+               }
+
+               public override int GetHashCode ()
+               {
+                       return name.GetHashCode ();
+               }
+
                internal override int get_next_table_index (object obj, int table, bool inc) {
-                   return type.get_next_table_index (obj, table, inc);
+                       return type.get_next_table_index (obj, table, inc);
                }
 
                internal void set_override (MethodInfo mdecl) {
@@ -303,47 +478,30 @@ namespace System.Reflection.Emit {
                        return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
                }
 
-#if NET_1_2
+#if NET_2_0 || BOOTSTRAP_NET_2_0
                [MethodImplAttribute(MethodImplOptions.InternalCall)]
-               public override extern MethodInfo BindGenericParameters (Type [] types);
+               public override extern MethodInfo MakeGenericMethod (Type [] types);
 
-               [MethodImplAttribute(MethodImplOptions.InternalCall)]
-               private extern MonoGenericParam define_generic_parameter (string name, int index);
-               
-               public Type DefineGenericParameter (string name)
-               {
-                       int index;
-                       if (generic_params != null) {
-                               MonoGenericParam[] new_generic_params = new MonoGenericParam [generic_params.Length+1];
-                               System.Array.Copy (generic_params, new_generic_params, generic_params.Length);
-                               index = generic_params.Length;
-                               generic_params = new_generic_params;
-                       } else {
-                               generic_params = new MonoGenericParam [1];
-                               index = 0;
-                       }
-
-                       generic_params [index] = define_generic_parameter (name, index);
-                       return generic_params [index];
-               }
-
-               public void SetGenericParameterConstraints (int index, Type[] constraints, bool has_ctor_constraint)
-               {
-                       generic_params [index].SetConstraints (constraints, has_ctor_constraint);
-               }
-
-               public override bool Mono_IsInflatedMethod {
+               public override bool IsGenericMethodDefinition {
                        get {
-                               return false;
+                               return generic_params != null;
                        }
                }
 
-               public override bool HasGenericParameters {
+               public override bool IsGenericMethod {
                        get {
                                return generic_params != null;
                        }
                }
 
+               public override MethodInfo GetGenericMethodDefinition ()
+               {
+                       if (!IsGenericMethodDefinition)
+                               throw new InvalidOperationException ();
+
+                       return this;
+               }
+
                public override Type[] GetGenericArguments ()
                {
                        if (generic_params == null)
@@ -356,6 +514,16 @@ namespace System.Reflection.Emit {
                        return result;
                }
 
+               public GenericTypeParameterBuilder[] DefineGenericParameters (params string[] names)
+               {
+                       generic_params = new GenericTypeParameterBuilder [names.Length];
+                       for (int i = 0; i < names.Length; i++)
+                               generic_params [i] = new GenericTypeParameterBuilder (
+                                       type, this, names [i], i);
+
+                       return generic_params;
+               }
+
                public void SetGenericMethodSignature (MethodAttributes attributes, CallingConventions callingConvention, Type return_type, Type[] parameter_types)
                {
                        RejectIfCreated ();
@@ -363,13 +531,66 @@ namespace System.Reflection.Emit {
                        this.attrs = attributes;
                        this.call_conv = callingConvention;
                        if ((attributes & MethodAttributes.Static) == 0)
-                               this.call_conv |= CallingConventions.HasThis;
+                               this.call_conv |= CallingConventions.HasThis;
 
                        this.rtype = return_type;
                        this.parameters = new Type [parameter_types.Length];
                        System.Array.Copy (parameter_types, this.parameters, parameter_types.Length);
                }
+
+               public void SetReturnType (Type returnType)
+               {
+                       rtype = returnType;
+               }
+
+               public void SetParameters (params Type[] parameterTypes)
+               {
+                       if (parameterTypes != null) {
+                               for (int i = 0; i < parameterTypes.Length; ++i)
+                                       if (parameterTypes [i] == null)
+                                               throw new ArgumentException ("Elements of the parameterTypes array cannot be null", "parameterTypes");
+
+                               this.parameters = new Type [parameterTypes.Length];
+                               System.Array.Copy (parameterTypes, this.parameters, parameterTypes.Length);
+                       }
+               }
+
+               public void SetSignature (Type returnType, Type[] returnTypeRequiredCustomModifiers, Type[] returnTypeOptionalCustomModifiers, Type[] parameterTypes, Type[][] parameterTypeRequiredCustomModifiers, Type[][] parameterTypeOptionalCustomModifiers) {
+                       SetReturnType (returnType);
+                       SetParameters (parameterTypes);
+                       this.returnModReq = returnTypeRequiredCustomModifiers;
+                       this.returnModOpt = returnTypeOptionalCustomModifiers;
+                       this.paramModReq = parameterTypeRequiredCustomModifiers;
+                       this.paramModOpt = parameterTypeOptionalCustomModifiers;
+               }
+
+               public override Module Module {
+                       get {
+                               return base.Module;
+                       }
+               }
 #endif
+
+                void _MethodBuilder.GetIDsOfNames([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
+                {
+                        throw new NotImplementedException ();
+                }
+
+                void _MethodBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
+                {
+                        throw new NotImplementedException ();
+                }
+
+                void _MethodBuilder.GetTypeInfoCount (out uint pcTInfo)
+                {
+                        throw new NotImplementedException ();
+                }
+
+                void _MethodBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
+                {
+                        throw new NotImplementedException ();
+                }
+
        }
 }