/// <summary>
/// Shutdown Method
/// </summary>
/// <remarks>
/// Shutdown and release resources held by the Python runtime. The
/// Python runtime can no longer be used in the current process
/// after calling the Shutdown method.
/// </remarks>
public static void Shutdown()
{
if (initialized)
{
PyScopeManager.Global.Clear();
// If the shutdown handlers trigger a domain unload,
// don't call shutdown again.
AppDomain.CurrentDomain.DomainUnload -= OnDomainUnload;
ExecuteShutdownHandlers();
PyObjectConversions.Reset();
initialized = false;
}
}
internal static bool ToManagedValue(IntPtr value, Type obType,
out object result, bool setError)
{
if (obType == typeof(PyObject))
{
Runtime.XIncref(value); // PyObject() assumes ownership
result = new PyObject(value);
return(true);
}
// Common case: if the Python value is a wrapped managed object
// instance, just return the wrapped object.
ManagedType mt = ManagedType.GetManagedObject(value);
result = null;
if (mt != null)
{
if (mt is CLRObject)
{
object tmp = ((CLRObject)mt).inst;
if (obType.IsInstanceOfType(tmp))
{
result = tmp;
return(true);
}
Exceptions.SetError(Exceptions.TypeError, $"value cannot be converted to {obType}");
return(false);
}
if (mt is ClassBase)
{
var cb = (ClassBase)mt;
if (!cb.type.Valid)
{
Exceptions.SetError(Exceptions.TypeError, cb.type.DeletedMessage);
return(false);
}
result = cb.type.Value;
return(true);
}
// shouldn't happen
return(false);
}
if (value == Runtime.PyNone && !obType.IsValueType)
{
result = null;
return(true);
}
if (obType.IsGenericType && obType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
if (value == Runtime.PyNone)
{
result = null;
return(true);
}
// Set type to underlying type
obType = obType.GetGenericArguments()[0];
}
if (obType.IsArray)
{
return(ToArray(value, obType, out result, setError));
}
if (obType.IsEnum)
{
return(ToEnum(value, obType, out result, setError));
}
// Conversion to 'Object' is done based on some reasonable default
// conversions (Python string -> managed string, Python int -> Int32 etc.).
if (obType == objectType)
{
if (Runtime.IsStringType(value))
{
return(ToPrimitive(value, stringType, out result, setError));
}
if (Runtime.PyBool_Check(value))
{
return(ToPrimitive(value, boolType, out result, setError));
}
if (Runtime.PyInt_Check(value))
{
return(ToPrimitive(value, int32Type, out result, setError));
}
if (Runtime.PyLong_Check(value))
{
return(ToPrimitive(value, int64Type, out result, setError));
}
if (Runtime.PyFloat_Check(value))
{
return(ToPrimitive(value, doubleType, out result, setError));
}
// give custom codecs a chance to take over conversion of sequences
IntPtr pyType = Runtime.PyObject_TYPE(value);
if (PyObjectConversions.TryDecode(value, pyType, obType, out result))
{
return(true);
}
if (Runtime.PySequence_Check(value))
{
return(ToArray(value, typeof(object[]), out result, setError));
}
Runtime.XIncref(value); // PyObject() assumes ownership
result = new PyObject(value);
return(true);
}
// Conversion to 'Type' is done using the same mappings as above for objects.
if (obType == typeType)
{
if (value == Runtime.PyStringType)
{
result = stringType;
return(true);
}
if (value == Runtime.PyBoolType)
{
result = boolType;
return(true);
}
if (value == Runtime.PyIntType)
{
result = int32Type;
return(true);
}
if (value == Runtime.PyLongType)
{
result = int64Type;
return(true);
}
if (value == Runtime.PyFloatType)
{
result = doubleType;
return(true);
}
if (value == Runtime.PyListType || value == Runtime.PyTupleType)
{
result = typeof(object[]);
return(true);
}
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, "value cannot be converted to Type");
}
return(false);
}
TypeCode typeCode = Type.GetTypeCode(obType);
if (typeCode == TypeCode.Object)
{
IntPtr pyType = Runtime.PyObject_TYPE(value);
if (PyObjectConversions.TryDecode(value, pyType, obType, out result))
{
return(true);
}
}
return(ToPrimitive(value, obType, out result, setError));
}
internal static IntPtr ToPython(object value, Type type)
{
if (value is PyObject)
{
IntPtr handle = ((PyObject)value).Handle;
Runtime.XIncref(handle);
return(handle);
}
IntPtr result = IntPtr.Zero;
// Null always converts to None in Python.
if (value == null)
{
result = Runtime.PyNone;
Runtime.XIncref(result);
return(result);
}
if (Type.GetTypeCode(type) == TypeCode.Object && value.GetType() != typeof(object))
{
var encoded = PyObjectConversions.TryEncode(value, type);
if (encoded != null)
{
result = encoded.Handle;
Runtime.XIncref(result);
return(result);
}
}
if (value is IList && !(value is INotifyPropertyChanged) && value.GetType().IsGenericType)
{
using (var resultlist = new PyList())
{
foreach (object o in (IEnumerable)value)
{
using (var p = new PyObject(ToPython(o, o?.GetType())))
{
resultlist.Append(p);
}
}
Runtime.XIncref(resultlist.Handle);
return(resultlist.Handle);
}
}
if (type.IsInterface)
{
var ifaceObj = (InterfaceObject)ClassManager.GetClass(type);
return(ifaceObj.WrapObject(value));
}
// We need to special case interface array handling to ensure we
// produce the correct type. Value may be an array of some concrete
// type (FooImpl[]), but we want access to go via the interface type
// (IFoo[]).
if (type.IsArray && type.GetElementType().IsInterface)
{
return(CLRObject.GetInstHandle(value, type));
}
// it the type is a python subclass of a managed type then return the
// underlying python object rather than construct a new wrapper object.
var pyderived = value as IPythonDerivedType;
if (null != pyderived)
{
if (!IsTransparentProxy(pyderived))
{
return(ClassDerivedObject.ToPython(pyderived));
}
}
// hmm - from Python, we almost never care what the declared
// type is. we'd rather have the object bound to the actual
// implementing class.
type = value.GetType();
TypeCode tc = Type.GetTypeCode(type);
switch (tc)
{
case TypeCode.Object:
return(CLRObject.GetInstHandle(value, type));
case TypeCode.String:
return(Runtime.PyUnicode_FromString((string)value));
case TypeCode.Int32:
return(Runtime.PyInt_FromInt32((int)value));
case TypeCode.Boolean:
if ((bool)value)
{
Runtime.XIncref(Runtime.PyTrue);
return(Runtime.PyTrue);
}
Runtime.XIncref(Runtime.PyFalse);
return(Runtime.PyFalse);
case TypeCode.Byte:
return(Runtime.PyInt_FromInt32((int)((byte)value)));
case TypeCode.Char:
return(Runtime.PyUnicode_FromOrdinal((int)((char)value)));
case TypeCode.Int16:
return(Runtime.PyInt_FromInt32((int)((short)value)));
case TypeCode.Int64:
return(Runtime.PyLong_FromLongLong((long)value));
case TypeCode.Single:
// return Runtime.PyFloat_FromDouble((double)((float)value));
string ss = ((float)value).ToString(nfi);
IntPtr ps = Runtime.PyString_FromString(ss);
IntPtr op = Runtime.PyFloat_FromString(ps, IntPtr.Zero);
Runtime.XDecref(ps);
return(op);
case TypeCode.Double:
return(Runtime.PyFloat_FromDouble((double)value));
case TypeCode.SByte:
return(Runtime.PyInt_FromInt32((int)((sbyte)value)));
case TypeCode.UInt16:
return(Runtime.PyInt_FromInt32((int)((ushort)value)));
case TypeCode.UInt32:
return(Runtime.PyLong_FromUnsignedLong((uint)value));
case TypeCode.UInt64:
return(Runtime.PyLong_FromUnsignedLongLong((ulong)value));
default:
if (value is IEnumerable)
{
using (var resultlist = new PyList())
{
foreach (object o in (IEnumerable)value)
{
using (var p = new PyObject(ToPython(o, o?.GetType())))
{
resultlist.Append(p);
}
}
Runtime.XIncref(resultlist.Handle);
return(resultlist.Handle);
}
}
result = CLRObject.GetInstHandle(value, type);
return(result);
}
}
internal static IntPtr ToPython(object value, Type type)
{
if (value is PyObject)
{
IntPtr handle = ((PyObject)value).Handle;
Runtime.XIncref(handle);
return(handle);
}
IntPtr result = IntPtr.Zero;
// Null always converts to None in Python.
if (value == null)
{
result = Runtime.PyNone;
Runtime.XIncref(result);
return(result);
}
if (Type.GetTypeCode(type) == TypeCode.Object && value.GetType() != typeof(object))
{
var encoded = PyObjectConversions.TryEncode(value, type);
if (encoded != null)
{
result = encoded.Handle;
Runtime.XIncref(result);
return(result);
}
}
if (value is IList && !(value is INotifyPropertyChanged) && value.GetType().IsGenericType)
{
using (var resultlist = new PyList())
{
foreach (object o in (IEnumerable)value)
{
using (var p = new PyObject(ToPython(o, o?.GetType())))
{
resultlist.Append(p);
}
}
Runtime.XIncref(resultlist.Handle);
return(resultlist.Handle);
}
}
// it the type is a python subclass of a managed type then return the
// underlying python object rather than construct a new wrapper object.
var pyderived = value as IPythonDerivedType;
if (null != pyderived)
{
#if NETSTANDARD
return(ClassDerivedObject.ToPython(pyderived));
#else
// if object is remote don't do this
if (!System.Runtime.Remoting.RemotingServices.IsTransparentProxy(pyderived))
{
return(ClassDerivedObject.ToPython(pyderived));
}
#endif
}
// hmm - from Python, we almost never care what the declared
// type is. we'd rather have the object bound to the actual
// implementing class.
type = value.GetType();
TypeCode tc = Type.GetTypeCode(type);
switch (tc)
{
case TypeCode.Object:
return(CLRObject.GetInstHandle(value, type));
case TypeCode.String:
return(Runtime.PyUnicode_FromString((string)value));
case TypeCode.Int32:
return(Runtime.PyInt_FromInt32((int)value));
case TypeCode.Boolean:
if ((bool)value)
{
Runtime.XIncref(Runtime.PyTrue);
return(Runtime.PyTrue);
}
Runtime.XIncref(Runtime.PyFalse);
return(Runtime.PyFalse);
case TypeCode.Byte:
return(Runtime.PyInt_FromInt32((int)((byte)value)));
case TypeCode.Char:
return(Runtime.PyUnicode_FromOrdinal((int)((char)value)));
case TypeCode.Int16:
return(Runtime.PyInt_FromInt32((int)((short)value)));
case TypeCode.Int64:
return(Runtime.PyLong_FromLongLong((long)value));
case TypeCode.Single:
// return Runtime.PyFloat_FromDouble((double)((float)value));
string ss = ((float)value).ToString(nfi);
IntPtr ps = Runtime.PyString_FromString(ss);
IntPtr op = Runtime.PyFloat_FromString(ps, IntPtr.Zero);
Runtime.XDecref(ps);
return(op);
case TypeCode.Double:
return(Runtime.PyFloat_FromDouble((double)value));
case TypeCode.SByte:
return(Runtime.PyInt_FromInt32((int)((sbyte)value)));
case TypeCode.UInt16:
return(Runtime.PyInt_FromInt32((int)((ushort)value)));
case TypeCode.UInt32:
return(Runtime.PyLong_FromUnsignedLong((uint)value));
case TypeCode.UInt64:
return(Runtime.PyLong_FromUnsignedLongLong((ulong)value));
default:
if (value is IEnumerable)
{
using (var resultlist = new PyList())
{
foreach (object o in (IEnumerable)value)
{
using (var p = new PyObject(ToPython(o, o?.GetType())))
{
resultlist.Append(p);
}
}
Runtime.XIncref(resultlist.Handle);
return(resultlist.Handle);
}
}
result = CLRObject.GetInstHandle(value, type);
return(result);
}
}
internal static bool ToManagedValue(IntPtr value, Type obType,
out object result, bool setError, out bool usedImplicit)
{
usedImplicit = false;
if (obType == typeof(PyObject))
{
Runtime.XIncref(value); // PyObject() assumes ownership
result = new PyObject(value);
return(true);
}
if (obType.IsGenericType && Runtime.PyObject_TYPE(value) == Runtime.PyListType)
{
var typeDefinition = obType.GetGenericTypeDefinition();
if (typeDefinition == typeof(List <>))
{
return(ToList(value, obType, out result, setError));
}
}
// Common case: if the Python value is a wrapped managed object
// instance, just return the wrapped object.
ManagedType mt = ManagedType.GetManagedObject(value);
result = null;
if (mt != null)
{
if (mt is CLRObject co)
{
object tmp = co.inst;
if (obType.IsInstanceOfType(tmp))
{
result = tmp;
return(true);
}
else
{
var type = tmp.GetType();
// check implicit conversions that receive tmp type and return obType
var conversionMethod = type.GetMethod("op_Implicit", new[] { type });
if (conversionMethod != null && conversionMethod.ReturnType == obType)
{
result = conversionMethod.Invoke(null, new[] { tmp });
usedImplicit = true;
return(true);
}
}
if (setError)
{
string typeString = tmp is null ? "null" : tmp.GetType().ToString();
Exceptions.SetError(Exceptions.TypeError, $"{typeString} value cannot be converted to {obType}");
}
return(false);
}
if (mt is ClassBase cb)
{
if (!cb.type.Valid)
{
Exceptions.SetError(Exceptions.TypeError, cb.type.DeletedMessage);
return(false);
}
result = cb.type.Value;
return(true);
}
// shouldn't happen
return(false);
}
if (value == Runtime.PyNone && !obType.IsValueType)
{
result = null;
return(true);
}
if (obType.IsGenericType && obType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
if (value == Runtime.PyNone)
{
result = null;
return(true);
}
// Set type to underlying type
obType = obType.GetGenericArguments()[0];
}
if (obType.ContainsGenericParameters)
{
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, $"Cannot create an instance of the open generic type {obType}");
}
return(false);
}
if (obType.IsArray)
{
return(ToArray(value, obType, out result, setError));
}
if (obType.IsEnum)
{
return(ToEnum(value, obType, out result, setError));
}
// Conversion to 'Object' is done based on some reasonable default
// conversions (Python string -> managed string, Python int -> Int32 etc.).
if (obType == objectType)
{
if (Runtime.IsStringType(value))
{
return(ToPrimitive(value, stringType, out result, setError));
}
if (Runtime.PyBool_Check(value))
{
return(ToPrimitive(value, boolType, out result, setError));
}
if (Runtime.PyInt_Check(value))
{
return(ToPrimitive(value, int32Type, out result, setError));
}
if (Runtime.PyLong_Check(value))
{
return(ToPrimitive(value, int64Type, out result, setError));
}
if (Runtime.PyFloat_Check(value))
{
return(ToPrimitive(value, doubleType, out result, setError));
}
// give custom codecs a chance to take over conversion of sequences
IntPtr pyType = Runtime.PyObject_TYPE(value);
if (PyObjectConversions.TryDecode(value, pyType, obType, out result))
{
return(true);
}
if (Runtime.PySequence_Check(value))
{
return(ToArray(value, typeof(object[]), out result, setError));
}
Runtime.XIncref(value); // PyObject() assumes ownership
result = new PyObject(value);
return(true);
}
// Conversion to 'Type' is done using the same mappings as above for objects.
if (obType == typeType)
{
if (value == Runtime.PyStringType)
{
result = stringType;
return(true);
}
if (value == Runtime.PyBoolType)
{
result = boolType;
return(true);
}
if (value == Runtime.PyIntType)
{
result = int32Type;
return(true);
}
if (value == Runtime.PyLongType)
{
result = int64Type;
return(true);
}
if (value == Runtime.PyFloatType)
{
result = doubleType;
return(true);
}
if (value == Runtime.PyListType || value == Runtime.PyTupleType)
{
result = typeof(object[]);
return(true);
}
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, "value cannot be converted to Type");
}
return(false);
}
var underlyingType = Nullable.GetUnderlyingType(obType);
if (underlyingType != null)
{
return(ToManagedValue(value, underlyingType, out result, setError, out usedImplicit));
}
TypeCode typeCode = Type.GetTypeCode(obType);
if (typeCode == TypeCode.Object)
{
IntPtr pyType = Runtime.PyObject_TYPE(value);
if (PyObjectConversions.TryDecode(value, pyType, obType, out result))
{
return(true);
}
}
var opImplicit = obType.GetMethod("op_Implicit", new[] { obType });
if (opImplicit != null)
{
if (ToManagedValue(value, opImplicit.ReturnType, out result, setError, out usedImplicit))
{
opImplicit = obType.GetMethod("op_Implicit", new[] { result.GetType() });
if (opImplicit != null)
{
result = opImplicit.Invoke(null, new[] { result });
}
return(opImplicit != null);
}
}
return(ToPrimitive(value, obType, out result, setError));
}
internal static IntPtr ToPython(object value, Type type)
{
if (value is PyObject)
{
IntPtr handle = ((PyObject)value).Handle;
Runtime.XIncref(handle);
return(handle);
}
IntPtr result = IntPtr.Zero;
// Null always converts to None in Python.
if (value == null)
{
result = Runtime.PyNone;
Runtime.XIncref(result);
return(result);
}
if (Type.GetTypeCode(type) == TypeCode.Object && value.GetType() != typeof(object))
{
var encoded = PyObjectConversions.TryEncode(value, type);
if (encoded != null)
{
result = encoded.Handle;
Runtime.XIncref(result);
return(result);
}
}
if (value is IList && !(value is INotifyPropertyChanged) && value.GetType().IsGenericType)
{
using (var resultlist = new PyList())
{
foreach (object o in (IEnumerable)value)
{
using (var p = new PyObject(ToPython(o, o?.GetType())))
{
resultlist.Append(p);
}
}
Runtime.XIncref(resultlist.Handle);
return(resultlist.Handle);
}
}
// it the type is a python subclass of a managed type then return the
// underlying python object rather than construct a new wrapper object.
var pyderived = value as IPythonDerivedType;
if (null != pyderived)
{
if (!IsTransparentProxy(pyderived))
{
return(ClassDerivedObject.ToPython(pyderived));
}
}
// hmm - from Python, we almost never care what the declared
// type is. we'd rather have the object bound to the actual
// implementing class.
type = value.GetType();
TypeCode tc = Type.GetTypeCode(type);
switch (tc)
{
case TypeCode.Object:
if (value is TimeSpan)
{
var timespan = (TimeSpan)value;
IntPtr timeSpanArgs = Runtime.PyTuple_New(1);
Runtime.PyTuple_SetItem(timeSpanArgs, 0, Runtime.PyFloat_FromDouble(timespan.TotalDays));
var returnTimeSpan = Runtime.PyObject_CallObject(timeSpanCtor, timeSpanArgs);
// clean up
Runtime.XDecref(timeSpanArgs);
return(returnTimeSpan);
}
return(CLRObject.GetInstHandle(value, type));
case TypeCode.String:
return(Runtime.PyUnicode_FromString((string)value));
case TypeCode.Int32:
return(Runtime.PyInt_FromInt32((int)value));
case TypeCode.Boolean:
if ((bool)value)
{
Runtime.XIncref(Runtime.PyTrue);
return(Runtime.PyTrue);
}
Runtime.XIncref(Runtime.PyFalse);
return(Runtime.PyFalse);
case TypeCode.Byte:
return(Runtime.PyInt_FromInt32((int)((byte)value)));
case TypeCode.Char:
return(Runtime.PyUnicode_FromOrdinal((int)((char)value)));
case TypeCode.Int16:
return(Runtime.PyInt_FromInt32((int)((short)value)));
case TypeCode.Int64:
return(Runtime.PyLong_FromLongLong((long)value));
case TypeCode.Single:
// return Runtime.PyFloat_FromDouble((double)((float)value));
string ss = ((float)value).ToString(nfi);
IntPtr ps = Runtime.PyString_FromString(ss);
NewReference op = Runtime.PyFloat_FromString(new BorrowedReference(ps));;
Runtime.XDecref(ps);
return(op.DangerousMoveToPointerOrNull());
case TypeCode.Double:
return(Runtime.PyFloat_FromDouble((double)value));
case TypeCode.SByte:
return(Runtime.PyInt_FromInt32((int)((sbyte)value)));
case TypeCode.UInt16:
return(Runtime.PyInt_FromInt32((int)((ushort)value)));
case TypeCode.UInt32:
return(Runtime.PyLong_FromUnsignedLong((uint)value));
case TypeCode.UInt64:
return(Runtime.PyLong_FromUnsignedLongLong((ulong)value));
case TypeCode.Decimal:
// C# decimal to python decimal has a big impact on performance
// so we will use C# double and python float
return(Runtime.PyFloat_FromDouble(decimal.ToDouble((decimal)value)));
case TypeCode.DateTime:
var datetime = (DateTime)value;
var size = datetime.Kind == DateTimeKind.Unspecified ? 7 : 8;
IntPtr dateTimeArgs = Runtime.PyTuple_New(size);
Runtime.PyTuple_SetItem(dateTimeArgs, 0, Runtime.PyInt_FromInt32(datetime.Year));
Runtime.PyTuple_SetItem(dateTimeArgs, 1, Runtime.PyInt_FromInt32(datetime.Month));
Runtime.PyTuple_SetItem(dateTimeArgs, 2, Runtime.PyInt_FromInt32(datetime.Day));
Runtime.PyTuple_SetItem(dateTimeArgs, 3, Runtime.PyInt_FromInt32(datetime.Hour));
Runtime.PyTuple_SetItem(dateTimeArgs, 4, Runtime.PyInt_FromInt32(datetime.Minute));
Runtime.PyTuple_SetItem(dateTimeArgs, 5, Runtime.PyInt_FromInt32(datetime.Second));
// datetime.datetime 6th argument represents micro seconds
var totalSeconds = datetime.TimeOfDay.TotalSeconds;
var microSeconds = Convert.ToInt32((totalSeconds - Math.Truncate(totalSeconds)) * 1000000);
if (microSeconds == 1000000)
{
microSeconds = 999999;
}
Runtime.PyTuple_SetItem(dateTimeArgs, 6, Runtime.PyInt_FromInt32(microSeconds));
if (size == 8)
{
Runtime.PyTuple_SetItem(dateTimeArgs, 7, TzInfo(datetime.Kind));
}
var returnDateTime = Runtime.PyObject_CallObject(dateTimeCtor, dateTimeArgs);
// clean up
Runtime.XDecref(dateTimeArgs);
return(returnDateTime);
default:
if (value is IEnumerable)
{
using (var resultlist = new PyList())
{
foreach (object o in (IEnumerable)value)
{
using (var p = new PyObject(ToPython(o, o?.GetType())))
{
resultlist.Append(p);
}
}
Runtime.XIncref(resultlist.Handle);
return(resultlist.Handle);
}
}
result = CLRObject.GetInstHandle(value, type);
return(result);
}
}
internal static bool ToManagedValue(BorrowedReference value, Type obType,
out object?result, bool setError)
{
if (obType == typeof(PyObject))
{
result = new PyObject(value);
return(true);
}
if (obType.IsSubclassOf(typeof(PyObject)) &&
!obType.IsAbstract &&
obType.GetConstructor(new[] { typeof(PyObject) }) is { } ctor)
{
var untyped = new PyObject(value);
result = ToPyObjectSubclass(ctor, untyped, setError);
return(result is not null);
}
// Common case: if the Python value is a wrapped managed object
// instance, just return the wrapped object.
result = null;
switch (ManagedType.GetManagedObject(value))
{
case CLRObject co:
object tmp = co.inst;
if (obType.IsInstanceOfType(tmp))
{
result = tmp;
return(true);
}
if (setError)
{
string typeString = tmp is null ? "null" : tmp.GetType().ToString();
Exceptions.SetError(Exceptions.TypeError, $"{typeString} value cannot be converted to {obType}");
}
return(false);
case ClassBase cb:
if (!cb.type.Valid)
{
Exceptions.SetError(Exceptions.TypeError, cb.type.DeletedMessage);
return(false);
}
result = cb.type.Value;
return(true);
case null:
break;
default:
throw new ArgumentException("We should never receive instances of other managed types");
}
if (value == Runtime.PyNone && !obType.IsValueType)
{
result = null;
return(true);
}
if (obType.IsGenericType && obType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
if (value == Runtime.PyNone)
{
result = null;
return(true);
}
// Set type to underlying type
obType = obType.GetGenericArguments()[0];
}
if (obType.ContainsGenericParameters)
{
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, $"Cannot create an instance of the open generic type {obType}");
}
return(false);
}
if (obType.IsArray)
{
return(ToArray(value, obType, out result, setError));
}
// Conversion to 'Object' is done based on some reasonable default
// conversions (Python string -> managed string).
if (obType == objectType)
{
if (Runtime.IsStringType(value))
{
return(ToPrimitive(value, stringType, out result, setError));
}
if (Runtime.PyBool_Check(value))
{
return(ToPrimitive(value, boolType, out result, setError));
}
if (Runtime.PyFloat_Check(value))
{
return(ToPrimitive(value, doubleType, out result, setError));
}
// give custom codecs a chance to take over conversion of ints and sequences
BorrowedReference pyType = Runtime.PyObject_TYPE(value);
if (PyObjectConversions.TryDecode(value, pyType, obType, out result))
{
return(true);
}
if (Runtime.PyInt_Check(value))
{
result = new PyInt(value);
return(true);
}
if (Runtime.PySequence_Check(value))
{
return(ToArray(value, typeof(object[]), out result, setError));
}
result = new PyObject(value);
return(true);
}
// Conversion to 'Type' is done using the same mappings as above for objects.
if (obType == typeType)
{
if (value == Runtime.PyStringType)
{
result = stringType;
return(true);
}
if (value == Runtime.PyBoolType)
{
result = boolType;
return(true);
}
if (value == Runtime.PyLongType)
{
result = typeof(PyInt);
return(true);
}
if (value == Runtime.PyFloatType)
{
result = doubleType;
return(true);
}
if (value == Runtime.PyListType)
{
result = typeof(PyList);
return(true);
}
if (value == Runtime.PyTupleType)
{
result = typeof(PyTuple);
return(true);
}
if (setError)
{
Exceptions.SetError(Exceptions.TypeError, "value cannot be converted to Type");
}
return(false);
}
if (DecodableByUser(obType))
{
BorrowedReference pyType = Runtime.PyObject_TYPE(value);
if (PyObjectConversions.TryDecode(value, pyType, obType, out result))
{
return(true);
}
}
return(ToPrimitive(value, obType, out result, setError));
}
internal static NewReference ToPython(object?value, Type type)
{
if (value is PyObject pyObj)
{
return(new NewReference(pyObj));
}
// Null always converts to None in Python.
if (value == null)
{
return(new NewReference(Runtime.PyNone));
}
if (EncodableByUser(type, value))
{
var encoded = PyObjectConversions.TryEncode(value, type);
if (encoded != null)
{
return(new NewReference(encoded));
}
}
if (type.IsInterface)
{
var ifaceObj = (InterfaceObject)ClassManager.GetClassImpl(type);
return(ifaceObj.TryWrapObject(value));
}
if (type.IsArray || type.IsEnum)
{
return(CLRObject.GetReference(value, type));
}
// it the type is a python subclass of a managed type then return the
// underlying python object rather than construct a new wrapper object.
var pyderived = value as IPythonDerivedType;
if (null != pyderived)
{
if (!IsTransparentProxy(pyderived))
{
return(ClassDerivedObject.ToPython(pyderived));
}
}
// ModuleObjects are created in a way that their wrapping them as
// a CLRObject fails, the ClassObject has no tpHandle. Return the
// pyHandle as is, do not convert.
if (value is ModuleObject modobj)
{
throw new NotImplementedException();
}
// hmm - from Python, we almost never care what the declared
// type is. we'd rather have the object bound to the actual
// implementing class.
type = value.GetType();
if (type.IsEnum)
{
return(CLRObject.GetReference(value, type));
}
TypeCode tc = Type.GetTypeCode(type);
switch (tc)
{
case TypeCode.Object:
return(CLRObject.GetReference(value, type));
case TypeCode.String:
return(Runtime.PyString_FromString((string)value));
case TypeCode.Int32:
return(Runtime.PyInt_FromInt32((int)value));
case TypeCode.Boolean:
if ((bool)value)
{
return(new NewReference(Runtime.PyTrue));
}
return(new NewReference(Runtime.PyFalse));
case TypeCode.Byte:
return(Runtime.PyInt_FromInt32((byte)value));
case TypeCode.Char:
return(Runtime.PyUnicode_FromOrdinal((int)((char)value)));
case TypeCode.Int16:
return(Runtime.PyInt_FromInt32((short)value));
case TypeCode.Int64:
return(Runtime.PyLong_FromLongLong((long)value));
case TypeCode.Single:
return(Runtime.PyFloat_FromDouble((float)value));
case TypeCode.Double:
return(Runtime.PyFloat_FromDouble((double)value));
case TypeCode.SByte:
return(Runtime.PyInt_FromInt32((sbyte)value));
case TypeCode.UInt16:
return(Runtime.PyInt_FromInt32((ushort)value));
case TypeCode.UInt32:
return(Runtime.PyLong_FromUnsignedLongLong((uint)value));
case TypeCode.UInt64:
return(Runtime.PyLong_FromUnsignedLongLong((ulong)value));
default:
return(CLRObject.GetReference(value, type));
}
}
