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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.Diagnostics;
using System.Numerics;
using System.Runtime.InteropServices;
using Microsoft.Scripting;
using Microsoft.Scripting.Utils;
using IronPython.Runtime;
using IronPython.Runtime.Exceptions;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
namespace IronPython.Modules {
/// <summary>
/// Provides helper functions which need to be called from generated code to implement various
/// portions of modules.
/// </summary>
public static partial class ModuleOps {
public static IntPtr StringToHGlobalAnsi(string str) {
if (str == null) {
return IntPtr.Zero;
}
return Marshal.StringToHGlobalAnsi(str);
}
public static IntPtr StringToHGlobalUni(string str) {
if (str == null) {
return IntPtr.Zero;
}
return Marshal.StringToHGlobalUni(str);
}
public static object DoErrorCheck(object errCheckFunc, object result, object func, object[] arguments) {
return PythonCalls.Call(errCheckFunc, result, func, PythonTuple.Make(arguments));
}
public static object CreateMemoryHolder(IntPtr data, int size) {
var res = new MemoryHolder(size);
res.CopyFrom(data, new IntPtr(size));
return res;
}
public static object CreateNativeWrapper(PythonType type, object holder) {
Debug.Assert(holder is MemoryHolder);
CTypes.CData data = (CTypes.CData)type.CreateInstance(type.Context.SharedContext);
data.MemHolder = (MemoryHolder)holder;
return data;
}
public static object CreateCData(IntPtr dataAddress, PythonType type) {
CTypes.INativeType nativeType = (CTypes.INativeType)type;
CTypes.CData data = (CTypes.CData)type.CreateInstance(type.Context.SharedContext);
data.MemHolder = new MemoryHolder(nativeType.Size);
data.MemHolder.CopyFrom(dataAddress, new IntPtr(nativeType.Size));
return data;
}
public static object CreateCFunction(IntPtr address, PythonType type) {
return type.CreateInstance(type.Context.SharedContext, address);
}
public static CTypes.CData CheckSimpleCDataType(object o, object type) {
CTypes.SimpleCData res = o as CTypes.SimpleCData;
if (res == null && PythonOps.TryGetBoundAttr(o, "_as_parameter_", out object asParam)) {
res = asParam as CTypes.SimpleCData;
}
if (res != null && res.NativeType != type) {
throw PythonOps.TypeErrorForTypeMismatch(((PythonType)type).Name, o);
}
return res;
}
public static CTypes.CData/*!*/ CheckCDataType(object o, object type) {
CTypes.CData res = o as CTypes.CData;
if (res == null && PythonOps.TryGetBoundAttr(o, "_as_parameter_", out object asParam)) {
res = asParam as CTypes.CData;
}
bool valid = true;
// if we have an array, we can also send a pointer as long as the element types
// for the pointer and array are the same
if(res != null && res.NativeType is CTypes.ArrayType at) {
valid = ((type is CTypes.ArrayType t) && (t.ElementType == at.ElementType)) ||
((type is CTypes.PointerType p) && (p._type == at.ElementType));
}
if (res == null || !valid) {
throw ArgumentError(type, ((PythonType)type).Name, o);
}
return res;
}
public static IntPtr/*!*/ GetFunctionPointerValue(object o, object type) {
CTypes._CFuncPtr res = o as CTypes._CFuncPtr;
if (res == null && PythonOps.TryGetBoundAttr(o, "_as_parameter_", out object asParam)) {
res = asParam as CTypes._CFuncPtr;
}
if (res == null || res.NativeType != type) {
throw ArgumentError(type, ((PythonType)type).Name, o);
}
return res.addr;
}
public static CTypes.CData TryCheckCDataPointerType(object o, object type) {
CTypes.CData res = o as CTypes.CData;
if (res == null && PythonOps.TryGetBoundAttr(o, "_as_parameter_", out object asParam)) {
res = asParam as CTypes.CData;
}
bool valid = true;
// if we have an array, we can also send a pointer as long as the element types
// for the pointer and array are the same
if (res != null && res.NativeType is CTypes.ArrayType at) {
valid = ((type is CTypes.ArrayType t) && (t.ElementType == at.ElementType)) ||
((type is CTypes.PointerType p) && (p._type == at.ElementType));
}
if (res != null && !valid) {
throw ArgumentError(type, ((PythonType)((CTypes.PointerType)type)._type).Name, o);
}
return res;
}
public static CTypes._Array TryCheckCharArray(object o) {
if (o is CTypes._Array array) {
if (((CTypes.ArrayType)array.NativeType).ElementType is CTypes.SimpleType elemType && elemType._type == CTypes.SimpleTypeKind.Char) {
return array;
}
}
return null;
}
private static readonly byte[] FakeZeroLength = { 42 };
public static byte[] TryCheckBytes(object o) {
if (o is Bytes bytes) {
if (bytes.Count == 0) {
// OpCodes.Ldelema refuses to get address of empty array
// So we feed it with a fake one (cp34892)
return FakeZeroLength;
}
return bytes.UnsafeByteArray;
}
return null;
}
public static byte[] GetBytes(Bytes bytes) {
return bytes.UnsafeByteArray;
}
public static CTypes._Array TryCheckWCharArray(object o) {
if (o is CTypes._Array array) {
if (((CTypes.ArrayType)array.NativeType).ElementType is CTypes.SimpleType elemType && elemType._type == CTypes.SimpleTypeKind.WChar) {
return array;
}
}
return null;
}
public static object CreateSubclassInstance(object type, object instance) {
return PythonCalls.Call(type, instance);
}
public static void CallbackException(Exception e, CodeContext/*!*/ context) {
PythonContext pc = context.LanguageContext;
object stderr = pc.SystemStandardError;
PythonOps.PrintWithDest(context, stderr, pc.FormatException(e));
}
private static Exception ArgumentError(object type, string expected, object got) {
PythonContext pc = ((PythonType)type).Context;
return PythonExceptions.CreateThrowable(
(PythonType)pc.GetModuleState("ArgumentError"),
string.Format("expected {0}, got {1}", expected, PythonOps.GetPythonTypeName(got))
);
}
public static CTypes.CData CheckNativeArgument(object o, object type) {
if (o is CTypes.NativeArgument arg) {
if (((CTypes.PointerType)type)._type != DynamicHelpers.GetPythonType(arg._obj)) {
throw ArgumentError(type, ((PythonType)type).Name, o);
}
return arg._obj;
}
return null;
}
public static Bytes CharToBytes(byte c) {
return Bytes.FromByte(c);
}
public static string WCharToString(char c) {
return new string(c, 1);
}
public static char StringToChar(string s) {
return s[0];
}
public static string EnsureString(object o) {
if (!(o is string res)) {
throw PythonOps.TypeErrorForTypeMismatch("str", o);
}
return res;
}
public static bool CheckFunctionId(CTypes._CFuncPtr func, int id) {
return func.Id == id;
}
public static IntPtr GetWCharPointer(object value) {
if (value is string strVal) {
return Marshal.StringToCoTaskMemUni(strVal);
}
if (value == null) {
return IntPtr.Zero;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetWCharPointer(asParam);
}
throw PythonOps.TypeErrorForTypeMismatch("wchar pointer", value);
}
public static IntPtr GetBSTR(object value) {
if (value is string strVal) {
return Marshal.StringToBSTR(strVal);
}
if (value == null) {
return IntPtr.Zero;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetBSTR(asParam);
}
throw PythonOps.TypeErrorForTypeMismatch("BSTR", value);
}
public static IntPtr GetCharPointer(object value) {
if (value is Bytes bytes) {
var data = bytes.UnsafeByteArray;
var ptr = Marshal.AllocCoTaskMem(data.Length + 1);
Marshal.Copy(data, 0, ptr, data.Length);
Marshal.WriteByte(ptr, data.Length, 0);
return ptr;
}
if (value == null) {
return IntPtr.Zero;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetCharPointer(asParam);
}
throw PythonOps.TypeErrorForTypeMismatch("char pointer", value);
}
public static Bytes IntPtrToBytes(IntPtr ptr) {
// TODO: optimize this?
var str = Marshal.PtrToStringAnsi(ptr);
if (str is null) return null;
return Bytes.Make(str.MakeByteArray());
}
public static IntPtr GetPointer(object value) {
if (value == null) {
return IntPtr.Zero;
}
if (value is int iVal) {
if(iVal > int.MaxValue) {
iVal = -1;
}
return new IntPtr(iVal);
}
if (value is BigInteger bigVal) {
if(bigVal > long.MaxValue) {
bigVal = -1;
}
return new IntPtr((long)bigVal);
}
if (value is long lVal) {
return new IntPtr(lVal);
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetPointer(asParam);
}
if (value is CTypes.SimpleCData sd) {
CTypes.SimpleType simpType = (CTypes.SimpleType)sd.NativeType;
if (simpType._type == CTypes.SimpleTypeKind.WCharPointer ||
simpType._type == CTypes.SimpleTypeKind.CharPointer) {
return sd.UnsafeAddress;
} else if (simpType._type == CTypes.SimpleTypeKind.Pointer) {
return sd.MemHolder.ReadIntPtr(0);
}
}
if (value is CTypes._Array arr) {
return arr.UnsafeAddress;
}
if (value is CTypes._CFuncPtr func) {
return func.UnsafeAddress;
}
if (value is CTypes.Pointer pointer) {
return pointer.UnsafeAddress;
}
throw PythonOps.TypeErrorForTypeMismatch("pointer", value);
}
public static IntPtr GetInterfacePointer(IntPtr self, int offset) {
var vtable = Marshal.ReadIntPtr(self);
return Marshal.ReadIntPtr(vtable, offset * IntPtr.Size);
}
public static IntPtr GetObject(object value) {
GCHandle handle = GCHandle.Alloc(value);
// TODO: Need to free the handle at some point
return GCHandle.ToIntPtr(handle);
}
public static long GetSignedLongLong(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null) {
return res.Value;
}
if (value is BigInteger) {
return (long)(BigInteger)value;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetSignedLongLong(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("signed long long ", value);
}
public static long GetUnsignedLongLong(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null && res.Value >= 0) {
return res.Value;
}
if (value is BigInteger) {
return (long)(ulong)(BigInteger)value;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetUnsignedLongLong(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("unsigned long long", value);
}
public static double GetDouble(object value, object type) {
if (value is double) {
return (double)value;
} else if (value is float) {
return (float)value;
} else if (value is int) {
return (double)(int)value;
} else if (value is BigInteger) {
return (double)((BigInteger)value).ToFloat64();
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetDouble(asParam, type);
}
return Converter.ConvertToDouble(value);
}
public static float GetSingle(object value, object type) {
if (value is double) {
return (float)(double)value;
} else if (value is float) {
return (float)value;
} else if (value is int) {
return (float)(int)value;
} else if (value is BigInteger) {
return (float)((BigInteger)value).ToFloat64();
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetSingle(asParam, type);
}
return (float)Converter.ConvertToDouble(value);
}
public static long GetDoubleBits(object value) {
if (value is double) {
return BitConverter.ToInt64(BitConverter.GetBytes((double)value), 0);
} else if (value is float) {
return BitConverter.ToInt64(BitConverter.GetBytes((float)value), 0);
} else if (value is int) {
return BitConverter.ToInt64(BitConverter.GetBytes((double)(int)value), 0);
} else if (value is BigInteger) {
return BitConverter.ToInt64(BitConverter.GetBytes((double)((BigInteger)value).ToFloat64()), 0);
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetDoubleBits(asParam);
}
return BitConverter.ToInt64(BitConverter.GetBytes(Converter.ConvertToDouble(value)), 0);
}
public static int GetSingleBits(object value) {
if (value is double) {
return BitConverter.ToInt32(BitConverter.GetBytes((float)(double)value), 0);
} else if (value is float) {
return BitConverter.ToInt32(BitConverter.GetBytes((float)value), 0);
} else if (value is int) {
return BitConverter.ToInt32(BitConverter.GetBytes((float)(int)value), 0);
} else if (value is BigInteger) {
return BitConverter.ToInt32(BitConverter.GetBytes((float)((BigInteger)value).ToFloat64()), 0);
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetSingleBits(asParam);
}
return BitConverter.ToInt32(BitConverter.GetBytes((float)Converter.ConvertToDouble(value)), 0);
}
public static int GetSignedLong(object value, object type) {
if (value is int) {
return (int)value;
}
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null) {
return res.Value;
}
if (value is BigInteger && ((BigInteger)value).AsUInt32(out uint unsigned)) {
return (int)unsigned;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetSignedLong(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("signed long", value);
}
public static int GetUnsignedLong(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null) {
return res.Value;
}
if (value is BigInteger) {
if (((BigInteger)value).AsUInt32(out uint ures)) {
return (int)ures;
}
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetUnsignedLong(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("unsigned long", value);
}
public static int GetUnsignedInt(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null && res.Value >= 0) {
return res.Value;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetUnsignedInt(type, asParam);
}
throw PythonOps.TypeErrorForTypeMismatch("unsigned int", value);
}
public static int GetSignedInt(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null) {
return res.Value;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetSignedInt(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("signed int", value);
}
public static short GetUnsignedShort(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null) {
int iVal = res.Value;
if (iVal >= ushort.MinValue && iVal <= ushort.MaxValue) {
return (short)(ushort)iVal;
}
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetUnsignedShort(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("unsigned short", value);
}
public static short GetSignedShort(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null) {
int iVal = res.Value;
return (short)iVal;
} else if (value is BigInteger bigInt) {
return (short)(int)(bigInt & 0xffff);
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetSignedShort(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("signed short", value);
}
public static int GetVariantBool(object value, object type) {
return Converter.ConvertToBoolean(value) ? 1 : 0;
}
public static byte GetUnsignedByte(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null) {
return (byte)res.Value;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetUnsignedByte(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("unsigned byte", value);
}
public static byte GetSignedByte(object value, object type) {
int? res = Converter.ImplicitConvertToInt32(value);
if (res != null) {
int iVal = res.Value;
if (iVal >= sbyte.MinValue && iVal <= sbyte.MaxValue) {
return (byte)(sbyte)iVal;
}
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetSignedByte(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("signed byte", value);
}
public static byte GetBoolean(object value, object type) {
if (value is bool) {
return ((bool)value) ? (byte)1 : (byte)0;
} else if (value is int) {
return ((int)value) != 0 ? (byte)1 : (byte)0;
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetBoolean(asParam, type);
}
throw PythonOps.TypeErrorForTypeMismatch("bool", value);
}
public static byte GetChar(object value, object type) {
// TODO: .NET interop?
if (value is Bytes bytes && bytes.Count == 1) {
return ((IList<byte>)bytes)[0];
}
if (value is ByteArray bytearray && bytearray.Count == 1) {
return ((IList<byte>)bytearray)[0];
}
if (value is int i) {
try {
return checked((byte)i);
} catch (OverflowException) {
throw PythonOps.TypeError("one character bytes, bytearray or integer expected");
}
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetChar(asParam, type);
}
throw PythonOps.TypeError("one character bytes, bytearray or integer expected");
}
public static char GetWChar(object value, object type) {
if (value is string strVal) {
if (strVal.Length != 1) throw PythonOps.TypeError("one character unicode string expected");
return strVal[0];
}
if (PythonOps.TryGetBoundAttr(value, "_as_parameter_", out object asParam)) {
return GetWChar(asParam, type);
}
throw PythonOps.TypeError("unicode string expected instead of {0} instance", PythonOps.GetPythonTypeName(value));
}
public static object IntPtrToObject(IntPtr address) {
GCHandle handle = GCHandle.FromIntPtr(address);
object res = handle.Target;
handle.Free();
return res;
}
}
}
#endif