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Refactored il emitters into methods

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This commit is contained in:
Stefanos A. 2013-11-29 19:24:38 +01:00
parent 78c0c6fd4c
commit 0d9df5ad72
1 changed files with 97 additions and 85 deletions
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118
Source/OpenTK.Rewrite/Program.cs
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@ -212,7 +212,6 @@ namespace OpenTK.Rewrite
static void ProcessMethod(MethodDefinition wrapper, MethodDefinition native, int slot, FieldDefinition entry_points)
{
var nint = wrapper.DeclaringType.Module.Import(mscorlib.MainModule.GetType("System.IntPtr"));
//var nint = new TypeReference("System", "IntPtr", wrapper.DeclaringType.Module, null);
var body = wrapper.Body;
var il = body.GetILProcessor();
var instructions = body.Instructions;
@ -227,48 +226,7 @@ namespace OpenTK.Rewrite
{
int parameter_count = EmitParameters(wrapper, nint, body, il);
int difference = native.Parameters.Count - parameter_count;
if (difference == 2)
{
// Convert sized out-array/reference to return value, for example:
// void GenTextures(int n, int[] textures) -> int GenTexture()
// {
// const int n = 1;
// int buffers;
// calli GenTextures(n, &textures);
// return result;
// }
body.Variables.Add(new VariableDefinition(native.Parameters.Last().ParameterType));
il.Emit(OpCodes.Ldc_I4, 1); // const int n = 1
il.Emit(OpCodes.Ldloca, body.Variables.Count - 1); // &buffers
}
else if (difference == 1 && wrapper.ReturnType.Name != "Void")
{
// Convert unsized out-array/reference to return value, for example:
// void GetBoolean(GetPName pname, out bool data) -> bool GetBoolean(GetPName pname)
// {
// bool result;
// GetBooleanv(pname, &result);
// return result;
// }
body.Variables.Add(new VariableDefinition(wrapper.ReturnType));
il.Emit(OpCodes.Ldloca, body.Variables.Count - 1);
}
else if (difference == 1 && wrapper.ReturnType.Name == "Void")
{
// Convert in-array/reference to single element, for example:
// void DeleteTextures(int n, ref int textures) -> void DeleteTexture(int texture)
// {
// const int n = 1;
// calli DeleteTextures(n, &textures);
// }
il.Emit(OpCodes.Ldc_I4, 1); // const int n = 1
il.Emit(OpCodes.Ldarga, wrapper.Parameters.Last()); // &textures
}
else
{
Console.Error.WriteLine("Unknown wrapper type for ({0})", native.Name);
}
EmitConvenienceWrapper(wrapper, native, difference, body, il);
}
// push the entry point address on the stack
@ -278,6 +236,23 @@ namespace OpenTK.Rewrite
EmitCall(il, native);
if (wrapper.ReturnType.Name != "Void")
{
EmitReturnTypeWrapper(wrapper, native, body, il);
}
// return
il.Emit(OpCodes.Ret);
if (body.Variables.Count > 0)
{
// Required for verifiable executables
// (otherwise peverify complains bitterly)
body.InitLocals = true;
}
body.OptimizeMacros();
}
private static void EmitReturnTypeWrapper(MethodDefinition wrapper, MethodDefinition native, MethodBody body, ILProcessor il)
{
if (wrapper.Parameters.Count < native.Parameters.Count)
{
@ -321,16 +296,50 @@ namespace OpenTK.Rewrite
}
}
// return
il.Emit(OpCodes.Ret);
if (body.Variables.Count > 0)
private static void EmitConvenienceWrapper(MethodDefinition wrapper,
MethodDefinition native, int difference, MethodBody body, ILProcessor il)
{
// Required for verifiable executables
// (otherwise peverify complains bitterly)
body.InitLocals = true;
if (difference == 2)
{
// Convert sized out-array/reference to return value, for example:
// void GenTextures(int n, int[] textures) -> int GenTexture()
// {
// const int n = 1;
// int buffers;
// calli GenTextures(n, &textures);
// return result;
// }
body.Variables.Add(new VariableDefinition(native.Parameters.Last().ParameterType));
il.Emit(OpCodes.Ldc_I4, 1); // const int n = 1
il.Emit(OpCodes.Ldloca, body.Variables.Count - 1); // &buffers
}
else if (difference == 1 && wrapper.ReturnType.Name != "Void")
{
// Convert unsized out-array/reference to return value, for example:
// void GetBoolean(GetPName pname, out bool data) -> bool GetBoolean(GetPName pname)
// {
// bool result;
// GetBooleanv(pname, &result);
// return result;
// }
body.Variables.Add(new VariableDefinition(wrapper.ReturnType));
il.Emit(OpCodes.Ldloca, body.Variables.Count - 1);
}
else if (difference == 1 && wrapper.ReturnType.Name == "Void")
{
// Convert in-array/reference to single element, for example:
// void DeleteTextures(int n, ref int textures) -> void DeleteTexture(int texture)
// {
// const int n = 1;
// calli DeleteTextures(n, &textures);
// }
il.Emit(OpCodes.Ldc_I4, 1); // const int n = 1
il.Emit(OpCodes.Ldarga, wrapper.Parameters.Last()); // &textures
}
else
{
Console.Error.WriteLine("Unknown wrapper type for ({0})", native.Name);
}
body.OptimizeMacros();
}
static int EmitParameters(MethodDefinition method, TypeReference nint, MethodBody body, ILProcessor il)
@ -341,13 +350,16 @@ namespace OpenTK.Rewrite
var p = method.Parameters[i];
il.Emit(OpCodes.Ldarg, i);
if (p.ParameterType.IsArray || p.ParameterType.IsByReference)
if (p.ParameterType.IsGenericInstance)
{
}
else if (p.ParameterType.IsArray || p.ParameterType.IsByReference)
{
body.Variables.Add(new VariableDefinition(new PinnedType(nint)));
var index = body.Variables.Count - 1;
il.Emit(OpCodes.Stloc, index);
il.Emit(OpCodes.Ldloc, index);
//il.Emit(OpCodes.Conv_I);
}
}
return i;