mcs/class/corlib/System.Reflection.Emit/MethodBuilder.cs

   1
   2 //
   3 // System.Reflection.Emit/MethodBuilder.cs
   4 //
   5 // Author:
   6 //   Paolo Molaro (lupus@ximian.com)
   7 //
   8 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   9 //
  10
  11 using System;
  12 using System.Reflection;
  13 using System.Reflection.Emit;
  14 using System.Globalization;
  15 using System.Runtime.CompilerServices;
  16 using System.Runtime.InteropServices;
  17
  18 namespace System.Reflection.Emit {
  19         public sealed class MethodBuilder : MethodInfo {
  20                 private RuntimeMethodHandle mhandle;
  21                 private Type rtype;
  22                 private Type[] parameters;
  23                 private MethodAttributes attrs;
  24                 private MethodImplAttributes iattrs;
  25                 private string name;
  26                 private int table_idx;
  27                 private byte[] code;
  28                 private ILGenerator ilgen;
  29                 private TypeBuilder type;
  30                 private ParameterBuilder[] pinfo;
  31                 private CustomAttributeBuilder[] cattrs;
  32                 private MethodInfo override_method;
  33                 private string pi_dll;
  34                 private string pi_entry;
  35                 private CharSet ncharset;
  36                 private CallingConvention native_cc;
  37                 private CallingConventions call_conv;
  38                 private bool init_locals = true;
  39
  40                 internal MethodBuilder (TypeBuilder tb, string name, MethodAttributes attributes, CallingConventions callingConvention, Type returnType, Type[] parameterTypes) {
  41                         this.name = name;
  42                         this.attrs = attributes;
  43                         this.call_conv = callingConvention;
  44                         this.rtype = returnType;
  45                         if (parameterTypes != null) {
  46                                 this.parameters = new Type [parameterTypes.Length];
  47                                 System.Array.Copy (parameterTypes, this.parameters, parameterTypes.Length);
  48                         }
  49                         type = tb;
  50                         table_idx = get_next_table_index (this, 0x06, true);
  51                         //Console.WriteLine ("index for "+name+" set to "+table_idx.ToString());
  52                 }
  53
  54                 internal MethodBuilder (TypeBuilder tb, string name, MethodAttributes attributes,
  55                         CallingConventions callingConvention, Type returnType, Type[] parameterTypes,
  56                         String dllName, String entryName, CallingConvention nativeCConv, CharSet nativeCharset)
  57                         : this (tb, name, attributes, callingConvention, returnType, parameterTypes) {
  58                         pi_dll = dllName;
  59                         pi_entry = entryName;
  60                         native_cc = nativeCConv;
  61                         ncharset = nativeCharset;
  62                 }
  63
  64                 public bool InitLocals {
  65                         get {return init_locals;}
  66                         set {init_locals = value;}
  67                 }
  68
  69                 internal TypeBuilder TypeBuilder {
  70                         get {return type;}
  71                 }
  72
  73                 public override Type ReturnType {get {return rtype;}}
  74                 public override Type ReflectedType {get {return type;}}
  75                 public override Type DeclaringType {get {return type;}}
  76                 public override string Name {get {return name;}}
  77                 public override RuntimeMethodHandle MethodHandle {get {return mhandle;}}
  78                 public override MethodAttributes Attributes {get {return attrs;}}
  79                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
  80                         get {return null;}
  81                 }
  82                 public MethodToken GetToken() {
  83                         return new MethodToken(0x06000000 | table_idx);
  84                 }
  85
  86                 public override MethodInfo GetBaseDefinition() {
  87                         return null;
  88                 }
  89                 public override MethodImplAttributes GetMethodImplementationFlags() {
  90                         return iattrs;
  91                 }
  92                 public override ParameterInfo[] GetParameters() {
  93                         if (parameters == null)
  94                                 return null;
  95
  96                         ParameterInfo[] retval = new ParameterInfo [parameters.Length];
  97                         for (int i = 0; i < parameters.Length; i++) {
  98                                 retval [i] = new ParameterInfo (pinfo == null ? null : pinfo [i + 1], parameters [i], this, i + 1);
  99                         }
 100                         return retval;
 101                 }
 102
 103                 public void CreateMethodBody( byte[] il, int count) {
 104                         code = new byte [count];
 105                         System.Array.Copy(il, code, count);
 106                 }
 107                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) {
 108                         return null;
 109                 }
 110                 public override bool IsDefined (Type attribute_type, bool inherit) {
 111                         return false;
 112                 }
 113                 public override object[] GetCustomAttributes( bool inherit) {
 114                         return null;
 115                 }
 116                 public override object[] GetCustomAttributes( Type attributeType, bool inherit) {
 117                         return null;
 118                 }
 119                 public ILGenerator GetILGenerator () {
 120                         return GetILGenerator (64);
 121                 }
 122                 public ILGenerator GetILGenerator (int size) {
 123                         ilgen = new ILGenerator (this, size);
 124                         return ilgen;
 125                 }
 126
 127                 [MonoTODO]
 128                 public ParameterBuilder DefineParameter (int position, ParameterAttributes attributes, string strParamName)
 129                 {
 130                         ParameterBuilder pb = new ParameterBuilder (this, position, attributes, strParamName);
 131                         // check position
 132                         if (pinfo == null)
 133                                 pinfo = new ParameterBuilder [parameters.Length + 1];
 134                         pinfo [position] = pb;
 135                         return pb;
 136                 }
 137
 138                 internal void fixup () {
 139                         if (ilgen != null)
 140                                 ilgen.label_fixup ();
 141                 }
 142
 143                 public void SetCustomAttribute( CustomAttributeBuilder customBuilder) {
 144                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 145                         if (attrname == "System.Runtime.CompilerServices.MethodImplAttribute") {
 146                                 byte[] data = customBuilder.Data;
 147                                 int impla; // the (stupid) ctor takes a short or an int ...
 148                                 impla = (int)data [2];
 149                                 impla |= ((int)data [3]) << 8;
 150                                 SetImplementationFlags ((MethodImplAttributes)impla);
 151                                 return;
 152                         }
 153                         if (cattrs != null) {
 154                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 155                                 cattrs.CopyTo (new_array, 0);
 156                                 new_array [cattrs.Length] = customBuilder;
 157                                 cattrs = new_array;
 158                         } else {
 159                                 cattrs = new CustomAttributeBuilder [1];
 160                                 cattrs [0] = customBuilder;
 161                         }
 162                 }
 163                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 164                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 165                 }
 166                 public void SetImplementationFlags( MethodImplAttributes attributes) {
 167                         iattrs = attributes;
 168                 }
 169                 internal override int get_next_table_index (object obj, int table, bool inc) {
 170                         return type.get_next_table_index (obj, table, inc);
 171                 }
 172
 173                 internal void set_override (MethodInfo mdecl) {
 174                         override_method = mdecl;
 175                 }
 176         }
 177 }
 178