mcs/class/IKVM.Reflection/Emit/SignatureHelper.cs

   1 /*
   2   Copyright (C) 2008-2011 Jeroen Frijters
   3
   4   This software is provided 'as-is', without any express or implied
   5   warranty.  In no event will the authors be held liable for any damages
   6   arising from the use of this software.
   7
   8   Permission is granted to anyone to use this software for any purpose,
   9   including commercial applications, and to alter it and redistribute it
  10   freely, subject to the following restrictions:
  11
  12   1. The origin of this software must not be misrepresented; you must not
  13      claim that you wrote the original software. If you use this software
  14      in a product, an acknowledgment in the product documentation would be
  15      appreciated but is not required.
  16   2. Altered source versions must be plainly marked as such, and must not be
  17      misrepresented as being the original software.
  18   3. This notice may not be removed or altered from any source distribution.
  19
  20   Jeroen Frijters
  21   jeroen@frijters.net
  22
  23 */
  24 using System;
  25 using System.Collections.Generic;
  26 using System.Runtime.InteropServices;
  27 using IKVM.Reflection;
  28 using IKVM.Reflection.Writer;
  29
  30 namespace IKVM.Reflection.Emit
  31 {
  32         public sealed class SignatureHelper
  33         {
  34                 private readonly ModuleBuilder module;
  35                 private readonly byte type;
  36                 private readonly List<Type> args = new List<Type>();
  37                 private readonly List<LocalBuilder> locals = new List<LocalBuilder>();
  38                 private readonly List<CustomModifiers> customModifiers = new List<CustomModifiers>();
  39                 private readonly List<Type> optionalArgs = new List<Type>();
  40                 private Type returnType;
  41                 private CustomModifiers returnTypeCustomModifiers;
  42                 private CallingConventions callingConvention;
  43                 private CallingConvention unmanagedCallConv;
  44                 private bool unmanaged;
  45                 private bool optional;
  46
  47                 private SignatureHelper(ModuleBuilder module, byte type)
  48                 {
  49                         this.module = module;
  50                         this.type = type;
  51                 }
  52
  53                 internal bool HasThis
  54                 {
  55                         get { return (callingConvention & CallingConventions.HasThis) != 0; }
  56                 }
  57
  58                 internal Type ReturnType
  59                 {
  60                         get { return returnType; }
  61                 }
  62
  63                 internal int ParameterCount
  64                 {
  65                         get { return args.Count + optionalArgs.Count; }
  66                 }
  67
  68                 public static SignatureHelper GetFieldSigHelper(Module mod)
  69                 {
  70                         return new SignatureHelper(mod as ModuleBuilder, Signature.FIELD);
  71                 }
  72
  73                 public static SignatureHelper GetLocalVarSigHelper()
  74                 {
  75                         return new SignatureHelper(null, Signature.LOCAL_SIG);
  76                 }
  77
  78                 public static SignatureHelper GetLocalVarSigHelper(Module mod)
  79                 {
  80                         return new SignatureHelper(mod as ModuleBuilder, Signature.LOCAL_SIG);
  81                 }
  82
  83                 public static SignatureHelper GetPropertySigHelper(Module mod, Type returnType, Type[] parameterTypes)
  84                 {
  85                         SignatureHelper sig = new SignatureHelper(mod as ModuleBuilder, Signature.PROPERTY);
  86                         sig.returnType = returnType;
  87                         foreach (Type type in parameterTypes)
  88                         {
  89                                 sig.AddArgument(type);
  90                         }
  91                         return sig;
  92                 }
  93
  94                 public static SignatureHelper GetPropertySigHelper(Module mod, Type returnType, Type[] requiredReturnTypeCustomModifiers, Type[] optionalReturnTypeCustomModifiers, Type[] parameterTypes, Type[][] requiredParameterTypeCustomModifiers, Type[][] optionalParameterTypeCustomModifiers)
  95                 {
  96                         return GetPropertySigHelper(mod, CallingConventions.Standard, returnType, requiredReturnTypeCustomModifiers, optionalReturnTypeCustomModifiers, parameterTypes, requiredParameterTypeCustomModifiers, optionalParameterTypeCustomModifiers);
  97                 }
  98
  99                 public static SignatureHelper GetPropertySigHelper(Module mod, CallingConventions callingConvention, Type returnType, Type[] requiredReturnTypeCustomModifiers, Type[] optionalReturnTypeCustomModifiers, Type[] parameterTypes, Type[][] requiredParameterTypeCustomModifiers, Type[][] optionalParameterTypeCustomModifiers)
 100                 {
 101                         SignatureHelper sig = new SignatureHelper(mod as ModuleBuilder, Signature.PROPERTY);
 102                         sig.callingConvention = callingConvention;
 103                         sig.returnType = returnType;
 104                         sig.returnTypeCustomModifiers = CustomModifiers.FromReqOpt(requiredReturnTypeCustomModifiers, optionalReturnTypeCustomModifiers);
 105                         sig.AddArguments(parameterTypes, requiredParameterTypeCustomModifiers, optionalParameterTypeCustomModifiers);
 106                         return sig;
 107                 }
 108
 109                 public static SignatureHelper GetMethodSigHelper(CallingConvention unmanagedCallingConvention, Type returnType)
 110                 {
 111                         return GetMethodSigHelper(null, unmanagedCallingConvention, returnType);
 112                 }
 113
 114                 public static SignatureHelper GetMethodSigHelper(CallingConventions callingConvention, Type returnType)
 115                 {
 116                         return GetMethodSigHelper(null, callingConvention, returnType);
 117                 }
 118
 119                 public static SignatureHelper GetMethodSigHelper(Module mod, CallingConvention unmanagedCallConv, Type returnType)
 120                 {
 121                         SignatureHelper sig = new SignatureHelper(mod as ModuleBuilder, 0);
 122                         sig.returnType = returnType;
 123                         sig.unmanaged = true;
 124                         sig.unmanagedCallConv = unmanagedCallConv;
 125                         return sig;
 126                 }
 127
 128                 public static SignatureHelper GetMethodSigHelper(Module mod, CallingConventions callingConvention, Type returnType)
 129                 {
 130                         SignatureHelper sig = new SignatureHelper(mod as ModuleBuilder, 0);
 131                         sig.returnType = returnType;
 132                         sig.callingConvention = callingConvention;
 133                         return sig;
 134                 }
 135
 136                 public static SignatureHelper GetMethodSigHelper(Module mod, Type returnType, Type[] parameterTypes)
 137                 {
 138                         SignatureHelper sig = new SignatureHelper(mod as ModuleBuilder, 0);
 139                         sig.returnType = returnType;
 140                         sig.callingConvention = CallingConventions.Standard;
 141                         foreach (Type type in parameterTypes)
 142                         {
 143                                 sig.AddArgument(type);
 144                         }
 145                         return sig;
 146                 }
 147
 148                 public byte[] GetSignature()
 149                 {
 150                         if (module == null)
 151                         {
 152                                 throw new NotSupportedException();
 153                         }
 154                         return GetSignature(module).ToArray();
 155                 }
 156
 157                 internal ByteBuffer GetSignature(ModuleBuilder module)
 158                 {
 159                         ByteBuffer bb = new ByteBuffer(16);
 160                         switch (type)
 161                         {
 162                                 case 0:
 163                                         if (unmanaged)
 164                                         {
 165                                                 Signature.WriteStandAloneMethodSig(module, bb, module.universe.MakeStandAloneMethodSig(unmanagedCallConv, returnType, returnTypeCustomModifiers, args.ToArray(), customModifiers.ToArray()));
 166                                         }
 167                                         else
 168                                         {
 169                                                 Signature.WriteStandAloneMethodSig(module, bb, module.universe.MakeStandAloneMethodSig(callingConvention, returnType, returnTypeCustomModifiers, args.ToArray(), optionalArgs.ToArray(), customModifiers.ToArray()));
 170                                         }
 171                                         break;
 172                                 case Signature.FIELD:
 173                                         FieldSignature.Create(args[0], customModifiers[0]).WriteSig(module, bb);
 174                                         break;
 175                                 case Signature.PROPERTY:
 176                                         Signature.WritePropertySig(module, bb, callingConvention, returnType, returnTypeCustomModifiers, args.ToArray(), customModifiers.ToArray());
 177                                         break;
 178                                 case Signature.LOCAL_SIG:
 179                                         Signature.WriteLocalVarSig(module, bb, locals, customModifiers);
 180                                         break;
 181                                 default:
 182                                         throw new InvalidOperationException();
 183                         }
 184                         return bb;
 185                 }
 186
 187                 public void AddSentinel()
 188                 {
 189                         optional = true;
 190                         callingConvention |= CallingConventions.VarArgs;
 191                 }
 192
 193                 public void AddArgument(Type clsArgument)
 194                 {
 195                         AddArgument(clsArgument, false);
 196                 }
 197
 198                 public void AddArgument(Type argument, bool pinned)
 199                 {
 200                         __AddArgument(argument, pinned, new CustomModifiers());
 201                 }
 202
 203                 public void AddArgument(Type argument, Type[] requiredCustomModifiers, Type[] optionalCustomModifiers)
 204                 {
 205                         __AddArgument(argument, false, CustomModifiers.FromReqOpt(requiredCustomModifiers, optionalCustomModifiers));
 206                 }
 207
 208                 public void __AddArgument(Type argument, bool pinned, CustomModifiers customModifiers)
 209                 {
 210                         if (type == Signature.LOCAL_SIG)
 211                         {
 212                                 locals.Add(new LocalBuilder(argument, 0, pinned));
 213                         }
 214                         else if (optional)
 215                         {
 216                                 this.optionalArgs.Add(argument);
 217                         }
 218                         else
 219                         {
 220                                 this.args.Add(argument);
 221                         }
 222                         this.customModifiers.Add(customModifiers);
 223                 }
 224
 225                 public void AddArguments(Type[] arguments, Type[][] requiredCustomModifiers, Type[][] optionalCustomModifiers)
 226                 {
 227                         for (int i = 0; i < arguments.Length; i++)
 228                         {
 229                                 __AddArgument(arguments[i], false, CustomModifiers.FromReqOpt(requiredCustomModifiers[i], optionalCustomModifiers[i]));
 230                         }
 231                 }
 232         }
 233 }