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826 lines (712 loc) · 39.3 KB
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
#if FEATURE_CTYPES
using System;
using System.Collections.Generic;
using System.Numerics;
using System.Reflection.Emit;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using Microsoft.Scripting;
using Microsoft.Scripting.Runtime;
using IronPython.Runtime;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
namespace IronPython.Modules {
/// <summary>
/// Provides support for interop with native code from Python code.
/// </summary>
public static partial class CTypes {
/// <summary>
/// The meta class for ctypes simple data types. These include primitives like ints,
/// floats, etc... char/wchar pointers, and untyped pointers.
/// </summary>
[PythonType, PythonHidden]
public class SimpleType : PythonType, INativeType {
internal readonly SimpleTypeKind _type;
private readonly char _charType;
private readonly string _format;
private readonly bool _swap;
public SimpleType(CodeContext/*!*/ context, string name, PythonTuple bases, PythonDictionary dict) : base(context, name, bases, dict) {
string sVal;
const string allowedTypes = "?cbBghHiIlLdfuzZqQPXOv";
const string swappedTypes = "fdhHiIlLqQ";
if (!TryGetBoundCustomMember(context, "_type_", out object val) ||
(sVal = StringOps.AsString(val)) == null ||
sVal.Length != 1 ||
allowedTypes.IndexOf(sVal[0]) == -1) {
throw PythonOps.AttributeError("AttributeError: class must define a '_type_' attribute which must be a single character string containing one of '{0}'.", allowedTypes);
}
_charType = sVal[0];
switch (_charType) {
case '?': _type = SimpleTypeKind.Boolean; break;
case 'c': _type = SimpleTypeKind.Char; break;
case 'b': _type = SimpleTypeKind.SignedByte; break;
case 'B': _type = SimpleTypeKind.UnsignedByte; break;
case 'h': _type = SimpleTypeKind.SignedShort; break;
case 'H': _type = SimpleTypeKind.UnsignedShort; break;
case 'i': _type = SimpleTypeKind.SignedInt; break;
case 'I': _type = SimpleTypeKind.UnsignedInt; break;
case 'l': _type = SimpleTypeKind.SignedLong; break;
case 'L': _type = SimpleTypeKind.UnsignedLong; break;
case 'f': _type = SimpleTypeKind.Single; break;
case 'g': // long double, new in 2.6
case 'd': _type = SimpleTypeKind.Double; break;
case 'q': _type = SimpleTypeKind.SignedLongLong; break;
case 'Q': _type = SimpleTypeKind.UnsignedLongLong; break;
case 'O': _type = SimpleTypeKind.Object; break;
case 'P': _type = SimpleTypeKind.Pointer; break;
case 'z': _type = SimpleTypeKind.CharPointer; break;
case 'Z': _type = SimpleTypeKind.WCharPointer; break;
case 'u': _type = SimpleTypeKind.WChar; break;
case 'v': _type = SimpleTypeKind.VariantBool; break;
case 'X': _type = SimpleTypeKind.BStr; break;
default:
throw new NotImplementedException("simple type " + sVal);
}
if (!name.EndsWith("_be") && !name.EndsWith("_le") && swappedTypes.IndexOf(_charType) != -1) {
CreateSwappedType(context, name, bases, dict);
}
_format = (BitConverter.IsLittleEndian ? '<' : '>') + _charType.ToString();
}
private SimpleType(Type underlyingSystemType)
: base(underlyingSystemType) {
}
private SimpleType(CodeContext/*!*/ context, string name, PythonTuple bases, PythonDictionary dict, bool isLittleEndian) : this(context, name, bases, dict) {
_format = (isLittleEndian ? '<' : '>') + _charType.ToString();
_swap = isLittleEndian != BitConverter.IsLittleEndian;
}
private void CreateSwappedType(CodeContext/*!*/ context, string name, PythonTuple bases, PythonDictionary dict) {
SimpleType swapped = new SimpleType(context, name + (BitConverter.IsLittleEndian ? "_be" : "_le"), bases, dict, !BitConverter.IsLittleEndian);
if (BitConverter.IsLittleEndian) {
AddSlot("__ctype_be__", new PythonTypeUserDescriptorSlot(swapped));
AddSlot("__ctype_le__", new PythonTypeUserDescriptorSlot(this));
swapped.AddSlot("__ctype_le__", new PythonTypeUserDescriptorSlot(this));
swapped.AddSlot("__ctype_be__", new PythonTypeUserDescriptorSlot(swapped));
} else {
AddSlot("__ctype_le__", new PythonTypeUserDescriptorSlot(swapped));
AddSlot("__ctype_be__", new PythonTypeUserDescriptorSlot(this));
swapped.AddSlot("__ctype_le__", new PythonTypeUserDescriptorSlot(swapped));
swapped.AddSlot("__ctype_be__", new PythonTypeUserDescriptorSlot(this));
}
}
public static ArrayType/*!*/ operator *(SimpleType type, int count) {
return MakeArrayType(type, count);
}
public static ArrayType/*!*/ operator *(int count, SimpleType type) {
return MakeArrayType(type, count);
}
internal static PythonType MakeSystemType(Type underlyingSystemType) {
return PythonType.SetPythonType(underlyingSystemType, new SimpleType(underlyingSystemType));
}
public SimpleCData from_address(CodeContext/*!*/ context, int address) {
return from_address(context, new IntPtr(address));
}
public SimpleCData from_address(CodeContext/*!*/ context, BigInteger address) {
return from_address(context, new IntPtr((long)address));
}
public SimpleCData from_address(CodeContext/*!*/ context, IntPtr ptr) {
SimpleCData res = (SimpleCData)CreateInstance(context);
res.SetAddress(ptr);
return res;
}
public SimpleCData from_buffer(ArrayModule.array array, [DefaultParameterValue(0)]int offset) {
ValidateArraySizes(array, offset, ((INativeType)this).Size);
SimpleCData res = (SimpleCData)CreateInstance(Context.SharedContext);
IntPtr addr = array.GetArrayAddress();
res._memHolder = new MemoryHolder(addr.Add(offset), ((INativeType)this).Size);
res._memHolder.AddObject("ffffffff", array);
return res;
}
public SimpleCData from_buffer_copy(ArrayModule.array array, [DefaultParameterValue(0)]int offset) {
ValidateArraySizes(array, offset, ((INativeType)this).Size);
SimpleCData res = (SimpleCData)CreateInstance(Context.SharedContext);
res._memHolder = new MemoryHolder(((INativeType)this).Size);
res._memHolder.CopyFrom(array.GetArrayAddress().Add(offset), new IntPtr(((INativeType)this).Size));
GC.KeepAlive(array);
return res;
}
/// <summary>
/// Converts an object into a function call parameter.
/// </summary>
public object from_param(object obj) {
// TODO: This isn't right as we have an obj associated w/ the argument, CPython doesn't.
return new NativeArgument((CData)PythonCalls.Call(this, obj), _charType.ToString());
}
public SimpleCData in_dll(CodeContext/*!*/ context, object library, string name) {
IntPtr handle = GetHandleFromObject(library, "in_dll expected object with _handle attribute");
IntPtr addr = NativeFunctions.LoadFunction(handle, name);
if (addr == IntPtr.Zero) {
throw PythonOps.ValueError("{0} not found when attempting to load {1} from dll", name, Name);
}
SimpleCData res = (SimpleCData)CreateInstance(context);
res.SetAddress(addr);
return res;
}
#region INativeType Members
int INativeType.Size {
get {
switch (_type) {
case SimpleTypeKind.Char:
case SimpleTypeKind.SignedByte:
case SimpleTypeKind.UnsignedByte:
case SimpleTypeKind.Boolean:
return 1;
case SimpleTypeKind.SignedShort:
case SimpleTypeKind.UnsignedShort:
case SimpleTypeKind.WChar:
case SimpleTypeKind.VariantBool:
return 2;
case SimpleTypeKind.SignedInt:
case SimpleTypeKind.UnsignedInt:
case SimpleTypeKind.UnsignedLong:
case SimpleTypeKind.SignedLong:
case SimpleTypeKind.Single:
return 4;
case SimpleTypeKind.Double:
case SimpleTypeKind.UnsignedLongLong:
case SimpleTypeKind.SignedLongLong:
return 8;
case SimpleTypeKind.Object:
case SimpleTypeKind.Pointer:
case SimpleTypeKind.CharPointer:
case SimpleTypeKind.WCharPointer:
case SimpleTypeKind.BStr:
return IntPtr.Size;
}
throw new InvalidOperationException(_type.ToString());
}
}
int INativeType.Alignment {
get {
return ((INativeType)this).Size;
}
}
object INativeType.GetValue(MemoryHolder/*!*/ owner, object readingFrom, int offset, bool raw) {
object res;
switch (_type) {
case SimpleTypeKind.Boolean: res = owner.ReadByte(offset) != 0 ? ScriptingRuntimeHelpers.True : ScriptingRuntimeHelpers.False; break;
case SimpleTypeKind.Char: res = new string((char)owner.ReadByte(offset), 1); break;
case SimpleTypeKind.SignedByte: res = GetIntReturn((int)(sbyte)owner.ReadByte(offset)); break;
case SimpleTypeKind.UnsignedByte: res = GetIntReturn((int)owner.ReadByte(offset)); break;
case SimpleTypeKind.SignedShort: res = GetIntReturn(owner.ReadInt16(offset, _swap)); break;
case SimpleTypeKind.WChar: res = new string((char)owner.ReadInt16(offset), 1); break;
case SimpleTypeKind.UnsignedShort: res = GetIntReturn((ushort)owner.ReadInt16(offset, _swap)); break;
case SimpleTypeKind.VariantBool: res = owner.ReadInt16(offset, _swap) != 0 ? ScriptingRuntimeHelpers.True : ScriptingRuntimeHelpers.False; break;
case SimpleTypeKind.SignedInt: res = GetIntReturn(owner.ReadInt32(offset, _swap)); break;
case SimpleTypeKind.UnsignedInt: res = GetIntReturn((uint)owner.ReadInt32(offset, _swap)); break;
case SimpleTypeKind.UnsignedLong: res = GetIntReturn((uint)owner.ReadInt32(offset, _swap)); break;
case SimpleTypeKind.SignedLong: res = GetIntReturn(owner.ReadInt32(offset, _swap)); break;
case SimpleTypeKind.Single: res = GetSingleReturn(owner.ReadInt32(offset, _swap)); break;
case SimpleTypeKind.Double: res = GetDoubleReturn(owner.ReadInt64(offset, _swap)); break;
case SimpleTypeKind.UnsignedLongLong: res = GetIntReturn((ulong)owner.ReadInt64(offset, _swap)); break;
case SimpleTypeKind.SignedLongLong: res = GetIntReturn(owner.ReadInt64(offset, _swap)); break;
case SimpleTypeKind.Object: res = GetObjectReturn(owner.ReadIntPtr(offset)); break;
case SimpleTypeKind.Pointer: res = owner.ReadIntPtr(offset).ToPython(); break;
case SimpleTypeKind.CharPointer: res = owner.ReadMemoryHolder(offset).ReadAnsiString(0); break;
case SimpleTypeKind.WCharPointer: res = owner.ReadMemoryHolder(offset).ReadUnicodeString(0); break;
case SimpleTypeKind.BStr: res = Marshal.PtrToStringBSTR(owner.ReadIntPtr(offset)); break;
default:
throw new InvalidOperationException();
}
if (!raw && IsSubClass) {
res = PythonCalls.Call(this, res);
}
return res;
}
/// <summary>
/// Helper function for reading char/wchar's. This is used for reading from
/// arrays and pointers to avoid creating lots of 1-char strings.
/// </summary>
internal char ReadChar(MemoryHolder/*!*/ owner, int offset) {
switch (_type) {
case SimpleTypeKind.Char: return (char)owner.ReadByte(offset);
case SimpleTypeKind.WChar: return (char)owner.ReadInt16(offset);
default: throw new InvalidOperationException();
}
}
object INativeType.SetValue(MemoryHolder/*!*/ owner, int offset, object value) {
if (value is SimpleCData data && data.NativeType == this) {
data._memHolder.CopyTo(owner, offset, ((INativeType)this).Size);
return null;
}
switch (_type) {
case SimpleTypeKind.Boolean: owner.WriteByte(offset, ModuleOps.GetBoolean(value, this)); break;
case SimpleTypeKind.Char: owner.WriteByte(offset, ModuleOps.GetChar(value, this)); break;
case SimpleTypeKind.SignedByte: owner.WriteByte(offset, ModuleOps.GetSignedByte(value, this)); break;
case SimpleTypeKind.UnsignedByte: owner.WriteByte(offset, ModuleOps.GetUnsignedByte(value, this)); break;
case SimpleTypeKind.WChar: owner.WriteInt16(offset, (short)ModuleOps.GetWChar(value, this)); break;
case SimpleTypeKind.SignedShort: owner.WriteInt16(offset, ModuleOps.GetSignedShort(value, this), _swap); break;
case SimpleTypeKind.UnsignedShort: owner.WriteInt16(offset, ModuleOps.GetUnsignedShort(value, this), _swap); break;
case SimpleTypeKind.VariantBool: owner.WriteInt16(offset, (short)ModuleOps.GetVariantBool(value, this), _swap); break;
case SimpleTypeKind.SignedInt: owner.WriteInt32(offset, ModuleOps.GetSignedInt(value, this), _swap); break;
case SimpleTypeKind.UnsignedInt: owner.WriteInt32(offset, ModuleOps.GetUnsignedInt(value, this), _swap); break;
case SimpleTypeKind.UnsignedLong: owner.WriteInt32(offset, ModuleOps.GetUnsignedLong(value, this), _swap); break;
case SimpleTypeKind.SignedLong: owner.WriteInt32(offset, ModuleOps.GetSignedLong(value, this), _swap); break;
case SimpleTypeKind.Single: owner.WriteInt32(offset, ModuleOps.GetSingleBits(value), _swap); break;
case SimpleTypeKind.Double: owner.WriteInt64(offset, ModuleOps.GetDoubleBits(value), _swap); break;
case SimpleTypeKind.UnsignedLongLong: owner.WriteInt64(offset, ModuleOps.GetUnsignedLongLong(value, this), _swap); break;
case SimpleTypeKind.SignedLongLong: owner.WriteInt64(offset, ModuleOps.GetSignedLongLong(value, this), _swap); break;
case SimpleTypeKind.Object: owner.WriteIntPtr(offset, ModuleOps.GetObject(value)); break;
case SimpleTypeKind.Pointer: owner.WriteIntPtr(offset, ModuleOps.GetPointer(value)); break;
case SimpleTypeKind.CharPointer:
owner.WriteIntPtr(offset, ModuleOps.GetCharPointer(value));
return value;
case SimpleTypeKind.WCharPointer:
owner.WriteIntPtr(offset, ModuleOps.GetWCharPointer(value));
return value;
case SimpleTypeKind.BStr:
owner.WriteIntPtr(offset, ModuleOps.GetBSTR(value));
return value;
default:
throw new InvalidOperationException();
}
return null;
}
Type/*!*/ INativeType.GetNativeType() {
switch (_type) {
case SimpleTypeKind.Boolean:
return typeof(bool);
case SimpleTypeKind.Char:
return typeof(byte);
case SimpleTypeKind.SignedByte:
return typeof(sbyte);
case SimpleTypeKind.UnsignedByte:
return typeof(byte);
case SimpleTypeKind.SignedShort:
case SimpleTypeKind.VariantBool:
return typeof(short);
case SimpleTypeKind.UnsignedShort:
return typeof(ushort);
case SimpleTypeKind.WChar:
return typeof(char);
case SimpleTypeKind.SignedInt:
case SimpleTypeKind.SignedLong:
return typeof(int);
case SimpleTypeKind.UnsignedInt:
case SimpleTypeKind.UnsignedLong:
return typeof(uint);
case SimpleTypeKind.Single:
return typeof(float);
case SimpleTypeKind.Double:
return typeof(double);
case SimpleTypeKind.UnsignedLongLong:
return typeof(ulong);
case SimpleTypeKind.SignedLongLong:
return typeof(long);
case SimpleTypeKind.Object:
return typeof(IntPtr);
case SimpleTypeKind.Pointer:
case SimpleTypeKind.CharPointer:
case SimpleTypeKind.WCharPointer:
case SimpleTypeKind.BStr:
return typeof(IntPtr);
}
throw new InvalidOperationException();
}
MarshalCleanup INativeType.EmitMarshalling(ILGenerator/*!*/ method, LocalOrArg argIndex, List<object>/*!*/ constantPool, int constantPoolArgument) {
MarshalCleanup cleanup = null;
Label marshalled = method.DefineLabel();
Type argumentType = argIndex.Type;
if (!argumentType.IsValueType && _type != SimpleTypeKind.Object && _type != SimpleTypeKind.Pointer) {
// check if we have an explicit CData instance. If we have a CData but it's the
// wrong type CheckSimpleCDataType will throw.
Label primitive = method.DefineLabel();
argIndex.Emit(method);
constantPool.Add(this);
method.Emit(OpCodes.Ldarg, constantPoolArgument);
method.Emit(OpCodes.Ldc_I4, constantPool.Count - 1);
method.Emit(OpCodes.Ldelem_Ref);
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("CheckSimpleCDataType"));
method.Emit(OpCodes.Brfalse, primitive);
argIndex.Emit(method);
method.Emit(OpCodes.Castclass, typeof(CData));
method.Emit(OpCodes.Call, typeof(CData).GetMethod("get_UnsafeAddress"));
method.Emit(OpCodes.Ldobj, ((INativeType)this).GetNativeType());
method.Emit(OpCodes.Br, marshalled);
method.MarkLabel(primitive);
}
argIndex.Emit(method);
if (argumentType.IsValueType) {
method.Emit(OpCodes.Box, argumentType);
}
switch (_type) {
case SimpleTypeKind.Boolean:
case SimpleTypeKind.Char:
case SimpleTypeKind.SignedByte:
case SimpleTypeKind.UnsignedByte:
case SimpleTypeKind.SignedShort:
case SimpleTypeKind.UnsignedShort:
case SimpleTypeKind.WChar:
case SimpleTypeKind.SignedInt:
case SimpleTypeKind.UnsignedInt:
case SimpleTypeKind.UnsignedLong:
case SimpleTypeKind.SignedLong:
case SimpleTypeKind.Single:
case SimpleTypeKind.Double:
case SimpleTypeKind.UnsignedLongLong:
case SimpleTypeKind.SignedLongLong:
case SimpleTypeKind.VariantBool:
constantPool.Add(this);
method.Emit(OpCodes.Ldarg, constantPoolArgument);
method.Emit(OpCodes.Ldc_I4, constantPool.Count - 1);
method.Emit(OpCodes.Ldelem_Ref);
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("Get" + _type));
break;
case SimpleTypeKind.Pointer:
Label done = method.DefineLabel();
TryBytesConversion(method, done);
Label nextTry = method.DefineLabel();
argIndex.Emit(method);
if (argumentType.IsValueType) {
method.Emit(OpCodes.Box, argumentType);
}
method.Emit(OpCodes.Isinst, typeof(string));
method.Emit(OpCodes.Dup);
method.Emit(OpCodes.Brfalse, nextTry);
LocalBuilder lb = method.DeclareLocal(typeof(string), true);
method.Emit(OpCodes.Stloc, lb);
method.Emit(OpCodes.Ldloc, lb);
method.Emit(OpCodes.Conv_I);
method.Emit(OpCodes.Ldc_I4, RuntimeHelpers.OffsetToStringData);
method.Emit(OpCodes.Add);
method.Emit(OpCodes.Br, done);
method.MarkLabel(nextTry);
method.Emit(OpCodes.Pop);
argIndex.Emit(method);
if (argumentType.IsValueType) {
method.Emit(OpCodes.Box, argumentType);
}
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("GetPointer"));
method.MarkLabel(done);
break;
case SimpleTypeKind.Object:
// TODO: Need cleanup here
method.Emit(OpCodes.Call, typeof(CTypes).GetMethod("PyObj_ToPtr"));
break;
case SimpleTypeKind.CharPointer:
done = method.DefineLabel();
TryToCharPtrConversion(method, argIndex, argumentType, done);
cleanup = MarshalCharPointer(method, argIndex);
method.MarkLabel(done);
break;
case SimpleTypeKind.WCharPointer:
done = method.DefineLabel();
TryArrayToWCharPtrConversion(method, argIndex, argumentType, done);
MarshalWCharPointer(method, argIndex);
method.MarkLabel(done);
break;
case SimpleTypeKind.BStr:
throw new NotImplementedException("BSTR marshalling");
}
method.MarkLabel(marshalled);
return cleanup;
}
private static void TryBytesConversion(ILGenerator method, Label done) {
Label nextTry = method.DefineLabel();
LocalBuilder lb = method.DeclareLocal(typeof(byte).MakeByRefType(), true);
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("TryCheckBytes"));
method.Emit(OpCodes.Dup);
method.Emit(OpCodes.Brfalse, nextTry);
method.Emit(OpCodes.Ldc_I4_0);
method.Emit(OpCodes.Ldelema, typeof(Byte));
method.Emit(OpCodes.Stloc, lb);
method.Emit(OpCodes.Ldloc, lb);
method.Emit(OpCodes.Br, done);
method.MarkLabel(nextTry);
method.Emit(OpCodes.Pop);
}
internal static void TryArrayToWCharPtrConversion(ILGenerator method, LocalOrArg argIndex, Type argumentType, Label done) {
Label nextTry = method.DefineLabel();
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("TryCheckWCharArray"));
method.Emit(OpCodes.Dup);
method.Emit(OpCodes.Brfalse, nextTry);
method.Emit(OpCodes.Call, typeof(CData).GetMethod("get_UnsafeAddress"));
method.Emit(OpCodes.Br, done);
method.MarkLabel(nextTry);
method.Emit(OpCodes.Pop);
argIndex.Emit(method);
if (argumentType.IsValueType) {
method.Emit(OpCodes.Box, argumentType);
}
}
internal static void TryToCharPtrConversion(ILGenerator method, LocalOrArg argIndex, Type argumentType, Label done) {
TryBytesConversion(method, done);
Label nextTry = method.DefineLabel();
argIndex.Emit(method);
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("TryCheckCharArray"));
method.Emit(OpCodes.Dup);
method.Emit(OpCodes.Brfalse, nextTry);
method.Emit(OpCodes.Call, typeof(CData).GetMethod("get_UnsafeAddress"));
method.Emit(OpCodes.Br, done);
method.MarkLabel(nextTry);
method.Emit(OpCodes.Pop);
argIndex.Emit(method);
if (argumentType.IsValueType) {
method.Emit(OpCodes.Box, argumentType);
}
}
internal static void MarshalWCharPointer(ILGenerator method, LocalOrArg argIndex) {
Type argumentType = argIndex.Type;
Label isNull;
Label done;
LocalBuilder lb;
isNull = method.DefineLabel();
done = method.DefineLabel();
method.Emit(OpCodes.Brfalse, isNull);
argIndex.Emit(method);
if (argumentType.IsValueType) {
method.Emit(OpCodes.Box, argumentType);
}
lb = method.DeclareLocal(typeof(string), true);
method.Emit(OpCodes.Stloc, lb);
method.Emit(OpCodes.Ldloc, lb);
method.Emit(OpCodes.Conv_I);
method.Emit(OpCodes.Ldc_I4, RuntimeHelpers.OffsetToStringData);
method.Emit(OpCodes.Add);
method.Emit(OpCodes.Br, done);
method.MarkLabel(isNull);
method.Emit(OpCodes.Ldc_I4_0);
method.Emit(OpCodes.Conv_I);
method.MarkLabel(done);
}
internal static MarshalCleanup MarshalCharPointer(ILGenerator method, LocalOrArg argIndex) {
Type argumentType = argIndex.Type;
Label isNull, done;
LocalBuilder lb;
isNull = method.DefineLabel();
done = method.DefineLabel();
method.Emit(OpCodes.Brfalse, isNull);
argIndex.Emit(method);
if (argumentType.IsValueType) {
method.Emit(OpCodes.Box, argumentType);
}
lb = method.DeclareLocal(typeof(IntPtr));
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("StringToHGlobalAnsi"));
method.Emit(OpCodes.Stloc, lb);
method.Emit(OpCodes.Ldloc, lb);
method.Emit(OpCodes.Br, done);
method.MarkLabel(isNull);
method.Emit(OpCodes.Ldc_I4_0);
method.Emit(OpCodes.Conv_I);
method.MarkLabel(done);
return new StringCleanup(lb);
}
Type/*!*/ INativeType.GetPythonType() {
if (IsSubClass) {
return typeof(object);
}
return GetPythonTypeWorker();
}
private Type GetPythonTypeWorker() {
switch (_type) {
case SimpleTypeKind.Boolean:
return typeof(bool);
case SimpleTypeKind.CharPointer:
case SimpleTypeKind.WCharPointer:
case SimpleTypeKind.WChar:
case SimpleTypeKind.Char:
case SimpleTypeKind.BStr:
return typeof(string);
case SimpleTypeKind.VariantBool:
case SimpleTypeKind.SignedByte:
case SimpleTypeKind.UnsignedByte:
case SimpleTypeKind.SignedShort:
case SimpleTypeKind.UnsignedShort:
case SimpleTypeKind.SignedInt:
case SimpleTypeKind.SignedLong:
return typeof(int);
case SimpleTypeKind.UnsignedInt:
case SimpleTypeKind.UnsignedLong:
case SimpleTypeKind.UnsignedLongLong:
case SimpleTypeKind.SignedLongLong:
case SimpleTypeKind.Pointer:
case SimpleTypeKind.Object:
return typeof(object);
case SimpleTypeKind.Single:
case SimpleTypeKind.Double:
return typeof(double);
default:
throw new InvalidOperationException();
}
}
void INativeType.EmitReverseMarshalling(ILGenerator method, LocalOrArg value, List<object> constantPool, int constantPoolArgument) {
value.Emit(method);
switch (_type) {
case SimpleTypeKind.SignedByte:
case SimpleTypeKind.UnsignedByte:
case SimpleTypeKind.SignedShort:
case SimpleTypeKind.UnsignedShort:
case SimpleTypeKind.VariantBool:
method.Emit(OpCodes.Conv_I4);
break;
case SimpleTypeKind.SignedInt:
case SimpleTypeKind.SignedLong:
case SimpleTypeKind.Boolean:
break;
case SimpleTypeKind.Single:
method.Emit(OpCodes.Conv_R8);
break;
case SimpleTypeKind.Double:
break;
case SimpleTypeKind.UnsignedInt:
case SimpleTypeKind.UnsignedLong:
EmitInt32ToObject(method, value);
break;
case SimpleTypeKind.UnsignedLongLong:
case SimpleTypeKind.SignedLongLong:
EmitInt64ToObject(method, value);
break;
case SimpleTypeKind.Object:
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("IntPtrToObject"));
break;
case SimpleTypeKind.WCharPointer:
method.Emit(OpCodes.Call, typeof(Marshal).GetMethod("PtrToStringUni", new[] { typeof(IntPtr) }));
break;
case SimpleTypeKind.CharPointer:
method.Emit(OpCodes.Call, typeof(Marshal).GetMethod("PtrToStringAnsi", new[] { typeof(IntPtr) }));
break;
case SimpleTypeKind.BStr:
method.Emit(OpCodes.Call, typeof(Marshal).GetMethod("PtrToStringBSTR", new[] { typeof(IntPtr) }));
break;
case SimpleTypeKind.Char:
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("CharToString"));
break;
case SimpleTypeKind.WChar:
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("WCharToString"));
break;
case SimpleTypeKind.Pointer:
Label done, notNull;
done = method.DefineLabel();
notNull = method.DefineLabel();
if (IntPtr.Size == 4) {
LocalBuilder tmpLocal = method.DeclareLocal(typeof(uint));
method.Emit(OpCodes.Conv_U4);
method.Emit(OpCodes.Stloc, tmpLocal);
method.Emit(OpCodes.Ldloc, tmpLocal);
method.Emit(OpCodes.Ldc_I4_0);
method.Emit(OpCodes.Conv_U4);
method.Emit(OpCodes.Bne_Un, notNull);
method.Emit(OpCodes.Ldnull);
method.Emit(OpCodes.Br, done);
method.MarkLabel(notNull);
method.Emit(OpCodes.Ldloc, tmpLocal);
EmitInt32ToObject(method, new Local(tmpLocal));
} else {
LocalBuilder tmpLocal = method.DeclareLocal(typeof(long));
method.Emit(OpCodes.Conv_I8);
method.Emit(OpCodes.Stloc, tmpLocal);
method.Emit(OpCodes.Ldloc, tmpLocal);
method.Emit(OpCodes.Ldc_I4_0);
method.Emit(OpCodes.Conv_U8);
method.Emit(OpCodes.Bne_Un, notNull);
method.Emit(OpCodes.Ldnull);
method.Emit(OpCodes.Br, done);
method.MarkLabel(notNull);
method.Emit(OpCodes.Ldloc, tmpLocal);
EmitInt64ToObject(method, new Local(tmpLocal));
}
method.MarkLabel(done);
break;
}
if (IsSubClass) {
LocalBuilder tmp = method.DeclareLocal(typeof(object));
if (GetPythonTypeWorker().IsValueType) {
method.Emit(OpCodes.Box, GetPythonTypeWorker());
}
method.Emit(OpCodes.Stloc, tmp);
constantPool.Add(this);
method.Emit(OpCodes.Ldarg, constantPoolArgument);
method.Emit(OpCodes.Ldc_I4, constantPool.Count - 1);
method.Emit(OpCodes.Ldelem_Ref);
method.Emit(OpCodes.Ldloc, tmp);
method.Emit(OpCodes.Call, typeof(ModuleOps).GetMethod("CreateSubclassInstance"));
}
}
private static void EmitInt64ToObject(ILGenerator method, LocalOrArg value) {
Label done;
Label bigInt = method.DefineLabel();
done = method.DefineLabel();
method.Emit(OpCodes.Ldc_I4, Int32.MaxValue);
method.Emit(OpCodes.Conv_I8);
method.Emit(OpCodes.Bgt, bigInt);
value.Emit(method);
method.Emit(OpCodes.Ldc_I4, Int32.MinValue);
method.Emit(OpCodes.Conv_I8);
method.Emit(OpCodes.Blt, bigInt);
value.Emit(method);
method.Emit(OpCodes.Conv_I4);
method.Emit(OpCodes.Box, typeof(int));
method.Emit(OpCodes.Br, done);
method.MarkLabel(bigInt);
value.Emit(method);
method.Emit(OpCodes.Call, typeof(BigInteger).GetMethod("op_Implicit", new[] { value.Type }));
method.Emit(OpCodes.Box, typeof(BigInteger));
method.MarkLabel(done);
}
private static void EmitInt32ToObject(ILGenerator method, LocalOrArg value) {
Label intVal, done;
intVal = method.DefineLabel();
done = method.DefineLabel();
method.Emit(OpCodes.Ldc_I4, Int32.MaxValue);
method.Emit(value.Type == typeof(uint) ? OpCodes.Conv_U4 : OpCodes.Conv_U8);
method.Emit(OpCodes.Ble, intVal);
value.Emit(method);
method.Emit(OpCodes.Call, typeof(BigInteger).GetMethod("op_Implicit", new[] { value.Type }));
method.Emit(OpCodes.Box, typeof(BigInteger));
method.Emit(OpCodes.Br, done);
method.MarkLabel(intVal);
value.Emit(method);
method.Emit(OpCodes.Conv_I4);
method.Emit(OpCodes.Box, typeof(int));
method.MarkLabel(done);
}
private bool IsSubClass {
get {
return BaseTypes.Count != 1 || BaseTypes[0] != CTypes._SimpleCData;
}
}
private object GetObjectReturn(IntPtr intPtr) {
GCHandle handle = GCHandle.FromIntPtr(intPtr);
object res = handle.Target;
// TODO: handle lifetime management
return res;
}
private object GetDoubleReturn(long p) {
return BitConverter.ToDouble(BitConverter.GetBytes(p), 0);
}
private object GetSingleReturn(int p) {
return BitConverter.ToSingle(BitConverter.GetBytes(p), 0);
}
private static object GetIntReturn(int value) {
return ScriptingRuntimeHelpers.Int32ToObject((int)value);
}
private static object GetIntReturn(uint value) {
if (value > Int32.MaxValue) {
return (BigInteger)value;
}
return ScriptingRuntimeHelpers.Int32ToObject((int)value);
}
private static object GetIntReturn(long value) {
if (value <= Int32.MaxValue && value >= Int32.MinValue) {
return (int)value;
}
return (BigInteger)value;
}
private static object GetIntReturn(ulong value) {
if (value <= Int32.MaxValue) {
return (int)value;
}
return (BigInteger)value;
}
string INativeType.TypeFormat {
get {
return _format;
}
}
#endregion
}
}
}
#endif