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) || (pinfo == null))
  94                                 return null;
  95
  96                         ParameterInfo[] retval = new ParameterInfo [parameters.Length];
  97                         for (int i = 1; i < parameters.Length + 1; i++) {
  98                                 if (pinfo [i] == null)
  99                                         return null;
 100
 101                                 retval [i - 1] = new ParameterInfo (pinfo [i], parameters [i - 1], this);
 102                         }
 103
 104                         return retval;
 105                 }
 106
 107                 public void CreateMethodBody( byte[] il, int count) {
 108                         code = new byte [count];
 109                         System.Array.Copy(il, code, count);
 110                 }
 111                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) {
 112                         return null;
 113                 }
 114                 public override bool IsDefined (Type attribute_type, bool inherit) {
 115                         return false;
 116                 }
 117                 public override object[] GetCustomAttributes( bool inherit) {
 118                         return null;
 119                 }
 120                 public override object[] GetCustomAttributes( Type attributeType, bool inherit) {
 121                         return null;
 122                 }
 123                 public ILGenerator GetILGenerator () {
 124                         return GetILGenerator (256);
 125                 }
 126                 public ILGenerator GetILGenerator (int size) {
 127                         ilgen = new ILGenerator (this, size);
 128                         return ilgen;
 129                 }
 130
 131                 [MonoTODO]
 132                 public ParameterBuilder DefineParameter (int position, ParameterAttributes attributes, string strParamName)
 133                 {
 134                         ParameterBuilder pb = new ParameterBuilder (this, position, attributes, strParamName);
 135                         // check position
 136                         if (pinfo == null)
 137                                 pinfo = new ParameterBuilder [parameters.Length + 1];
 138                         pinfo [position] = pb;
 139                         return pb;
 140                 }
 141
 142                 internal void fixup () {
 143                         if (ilgen != null)
 144                                 ilgen.label_fixup ();
 145                 }
 146
 147                 public void SetCustomAttribute( CustomAttributeBuilder customBuilder) {
 148                         if (cattrs != null) {
 149                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 150                                 cattrs.CopyTo (new_array, 0);
 151                                 new_array [cattrs.Length] = customBuilder;
 152                                 cattrs = new_array;
 153                         } else {
 154                                 cattrs = new CustomAttributeBuilder [1];
 155                                 cattrs [0] = customBuilder;
 156                         }
 157                 }
 158                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 159                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 160                 }
 161                 public void SetImplementationFlags( MethodImplAttributes attributes) {
 162                         iattrs = attributes;
 163                 }
 164                 internal override int get_next_table_index (object obj, int table, bool inc) {
 165                         return type.get_next_table_index (obj, table, inc);
 166                 }
 167
 168                 internal void set_override (MethodInfo mdecl) {
 169                         override_method = mdecl;
 170                 }
 171         }
 172 }
 173