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409 lines (343 loc) · 15.6 KB
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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* [email protected]. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
#if FEATURE_NATIVE
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Reflection.Emit;
using System.Runtime.InteropServices;
using System.Text;
using Microsoft.Scripting;
using Microsoft.Scripting.Runtime;
using Microsoft.Scripting.Utils;
using IronPython.Runtime;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
#if CLR2
using Microsoft.Scripting.Math;
#else
using System.Numerics;
#endif
namespace IronPython.Modules {
/// <summary>
/// Provides support for interop with native code from Python code.
/// </summary>
public static partial class CTypes {
private static WeakDictionary<PythonType, Dictionary<int, ArrayType>> _arrayTypes = new WeakDictionary<PythonType, Dictionary<int, ArrayType>>();
/// <summary>
/// The meta class for ctypes array instances.
/// </summary>
[PythonType, PythonHidden]
public class ArrayType : PythonType, INativeType {
private int _length;
private INativeType _type;
public ArrayType(CodeContext/*!*/ context, string name, PythonTuple bases, PythonDictionary dict)
: base(context, name, bases, dict) {
object len;
int iLen;
if (!dict.TryGetValue("_length_", out len) || !(len is int) || (iLen = (int)len) < 0) {
throw PythonOps.AttributeError("arrays must have _length_ attribute and it must be a positive integer");
}
object type;
if (!dict.TryGetValue("_type_", out type)) {
throw PythonOps.AttributeError("class must define a '_type_' attribute");
}
_length = iLen;
_type = (INativeType)type;
if (_type is SimpleType) {
SimpleType st = (SimpleType)_type;
if (st._type == SimpleTypeKind.Char) {
// TODO: (c_int * 2).value isn't working
SetCustomMember(context,
"value",
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetCharArrayValue")),
NameType.Property | NameType.Python
)
);
SetCustomMember(context,
"raw",
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayRaw")),
NameType.Property | NameType.Python
)
);
} else if (st._type == SimpleTypeKind.WChar) {
SetCustomMember(context,
"value",
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayValue")),
NameType.Property | NameType.Python
)
);
SetCustomMember(context,
"raw",
new ReflectedExtensionProperty(
new ExtensionPropertyInfo(this, typeof(CTypes).GetMethod("GetWCharArrayRaw")),
NameType.Property | NameType.Python
)
);
}
}
}
private ArrayType(Type underlyingSystemType)
: base(underlyingSystemType) {
}
public _Array from_address(CodeContext/*!*/ context, int ptr) {
_Array res = (_Array)CreateInstance(context);
res.SetAddress(new IntPtr(ptr));
return res;
}
public _Array from_address(CodeContext/*!*/ context, BigInteger ptr) {
_Array res = (_Array)CreateInstance(context);
res.SetAddress(new IntPtr((long)ptr));
return res;
}
public _Array from_buffer(ArrayModule.array array, int offset=0) {
ValidateArraySizes(array, offset, ((INativeType)this).Size);
_Array res = (_Array)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 _Array from_buffer_copy(ArrayModule.array array, int offset=0) {
ValidateArraySizes(array, offset, ((INativeType)this).Size);
_Array res = (_Array)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;
}
public _Array from_buffer_copy(Bytes array, int offset=0) {
ValidateArraySizes(array, offset, ((INativeType)this).Size);
_Array res = (_Array)CreateInstance(Context.SharedContext);
res._memHolder = new MemoryHolder(((INativeType)this).Size);
for (int i = 0; i < ((INativeType)this).Size; i++) {
res._memHolder.WriteByte(i, array._bytes[i]);
}
return res;
}
/// <summary>
/// Converts an object into a function call parameter.
/// </summary>
public object from_param(object obj) {
return null;
}
internal static PythonType MakeSystemType(Type underlyingSystemType) {
return PythonType.SetPythonType(underlyingSystemType, new ArrayType(underlyingSystemType));
}
public static ArrayType/*!*/ operator *(ArrayType type, int count) {
return MakeArrayType(type, count);
}
public static ArrayType/*!*/ operator *(int count, ArrayType type) {
return MakeArrayType(type, count);
}
#region INativeType Members
int INativeType.Size {
get {
return GetSize();
}
}
private int GetSize() {
return _length * _type.Size;
}
int INativeType.Alignment {
get {
return _type.Alignment;
}
}
object INativeType.GetValue(MemoryHolder owner, object readingFrom, int offset, bool raw) {
if (IsStringType) {
SimpleType st = (SimpleType)_type;
string str;
if (st._type == SimpleTypeKind.Char) {
str = owner.ReadAnsiString(offset, _length);
} else {
str = owner.ReadUnicodeString(offset, _length);
}
// remove any trailing nulls
for (int i = 0; i < str.Length; i++) {
if (str[i] == '\x00') {
return str.Substring(0, i);
}
}
return str;
}
_Array arr = (_Array)CreateInstance(Context.SharedContext);
arr._memHolder = new MemoryHolder(owner.UnsafeAddress.Add(offset), ((INativeType)this).Size, owner);
return arr;
}
internal string GetRawValue(MemoryHolder owner, int offset) {
Debug.Assert(IsStringType);
SimpleType st = (SimpleType)_type;
string str;
if (st._type == SimpleTypeKind.Char) {
str = owner.ReadAnsiString(offset, _length);
} else {
str = owner.ReadUnicodeString(offset, _length);
}
return str;
}
private bool IsStringType {
get {
SimpleType st = _type as SimpleType;
if (st != null) {
return st._type == SimpleTypeKind.WChar || st._type == SimpleTypeKind.Char;
}
return false;
}
}
object INativeType.SetValue(MemoryHolder address, int offset, object value) {
string str = value as string;
if (str != null) {
if (!IsStringType) {
throw PythonOps.TypeError("expected {0} instance, got str", Name);
} else if (str.Length > _length) {
throw PythonOps.ValueError("string too long ({0}, maximum length {1})", str.Length, _length);
}
WriteString(address, offset, str);
return null;
} else if (IsStringType) {
IList<object> objList = value as IList<object>;
if (objList != null) {
StringBuilder res = new StringBuilder(objList.Count);
foreach (object o in objList) {
res.Append(Converter.ConvertToChar(o));
}
WriteString(address, offset, res.ToString());
return null;
}
throw PythonOps.TypeError("expected string or Unicode object, {0} found", DynamicHelpers.GetPythonType(value).Name);
}
object[] arrArgs = value as object[];
if (arrArgs == null) {
PythonTuple pt = value as PythonTuple;
if (pt != null) {
arrArgs = pt._data;
}
}
if (arrArgs != null) {
if (arrArgs.Length > _length) {
throw PythonOps.RuntimeError("invalid index");
}
for (int i = 0; i < arrArgs.Length; i++) {
_type.SetValue(address, checked(offset + i * _type.Size), arrArgs[i]);
}
} else {
_Array arr = value as _Array;
if (arr != null && arr.NativeType == this) {
arr._memHolder.CopyTo(address, offset, ((INativeType)this).Size);
return arr._memHolder.EnsureObjects();
}
throw PythonOps.TypeError("unexpected {0} instance, got {1}", Name, DynamicHelpers.GetPythonType(value).Name);
}
return null;
}
private void WriteString(MemoryHolder address, int offset, string str) {
SimpleType st = (SimpleType)_type;
if (str.Length < _length) {
str = str + '\x00';
}
if (st._type == SimpleTypeKind.Char) {
address.WriteAnsiString(offset, str);
} else {
address.WriteUnicodeString(offset, str);
}
}
Type/*!*/ INativeType.GetNativeType() {
return typeof(IntPtr);
}
MarshalCleanup INativeType.EmitMarshalling(ILGenerator/*!*/ method, LocalOrArg argIndex, List<object>/*!*/ constantPool, int constantPoolArgument) {
Type argumentType = argIndex.Type;
Label done = method.DefineLabel();
if (!argumentType.IsValueType) {
Label next = method.DefineLabel();
argIndex.Emit(method);
method.Emit(OpCodes.Ldnull);
method.Emit(OpCodes.Bne_Un, next);
method.Emit(OpCodes.Ldc_I4_0);
method.Emit(OpCodes.Conv_I);
method.Emit(OpCodes.Br, done);
method.MarkLabel(next);
}
argIndex.Emit(method);
if (argumentType.IsValueType) {
method.Emit(OpCodes.Box, argumentType);
}
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("CheckCDataType"));
method.Emit(OpCodes.Call, typeof(CData).GetMethod("get_UnsafeAddress"));
method.MarkLabel(done);
return null;
}
Type/*!*/ INativeType.GetPythonType() {
return ((INativeType)this).GetNativeType();
}
void INativeType.EmitReverseMarshalling(ILGenerator method, LocalOrArg value, List<object> constantPool, int constantPoolArgument) {
// TODO: Implement me
value.Emit(method);
}
#endregion
internal int Length {
get {
return _length;
}
}
internal INativeType ElementType {
get {
return _type;
}
}
string INativeType.TypeFormat {
get {
string size = "(" + Length;
INativeType elemType = ElementType;
while (elemType is ArrayType) {
size += "," + ((ArrayType)elemType).Length;
elemType = ((ArrayType)elemType).ElementType;
}
size += ")";
return size + elemType.TypeFormat;
}
}
}
private static ArrayType/*!*/ MakeArrayType(PythonType type, int count) {
if (count < 0) {
throw PythonOps.ValueError("cannot multiply ctype by negative number");
}
lock (_arrayTypes) {
ArrayType res;
Dictionary<int, ArrayType> countDict;
if (!_arrayTypes.TryGetValue(type, out countDict)) {
_arrayTypes[type] = countDict = new Dictionary<int, ArrayType>();
}
if (!countDict.TryGetValue(count, out res)) {
res = countDict[count] = new ArrayType(type.Context.SharedContext,
type.Name + "_Array_" + count,
PythonTuple.MakeTuple(Array),
PythonOps.MakeDictFromItems(new object[] { type, "_type_", count, "_length_" })
);
}
return res;
}
}
}
}
#endif