|
static private ToManaged ( |
||
| value | ||
| type | ||
| result | object | |
| setError | bool | |
| return | bool | |
static bool TryConvertArgument(IntPtr op, Type parameterType, bool needsResolution,
out object arg, out bool isOut)
{
arg = null;
isOut = false;
var clrtype = TryComputeClrArgumentType(parameterType, op, needsResolution: needsResolution);
if (clrtype == null)
{
return(false);
}
if (!Converter.ToManaged(op, clrtype, out arg, false))
{
// Arturo Rodriguez -- Start
// Needed to allow Python objects to be passed from python code to CLR functions.
var pyobj = new PyObject(op);
var ptype = pyobj.GetPythonType();
arg = pyobj;
clrtype = arg.GetType();
isOut = clrtype.IsByRef;
return(true);
// Arturo Rodriguez -- End
// Repo code
// Exceptions.Clear();
// return false;
}
isOut = clrtype.IsByRef;
return(true);
}
/// <summary>
/// Descriptor __set__ implementation. This method sets the value of
/// a field based on the given Python value. The Python value must be
/// convertible to the type of the field.
/// </summary>
public new static int tp_descr_set(IntPtr ds, IntPtr ob, IntPtr val)
{
var self = (FieldObject)GetManagedObject(ds);
object newval;
if (self == null)
{
return(-1);
}
if (val == IntPtr.Zero)
{
Exceptions.SetError(Exceptions.TypeError, "cannot delete field");
return(-1);
}
FieldInfo info = self.info;
if (info.IsLiteral || info.IsInitOnly)
{
Exceptions.SetError(Exceptions.TypeError, "field is read-only");
return(-1);
}
bool is_static = info.IsStatic;
if (ob == IntPtr.Zero || ob == Runtime.PyNone)
{
if (!is_static)
{
Exceptions.SetError(Exceptions.TypeError, "instance attribute must be set through a class instance");
return(-1);
}
}
if (!Converter.ToManaged(val, info.FieldType, out newval, true))
{
return(-1);
}
try
{
if (!is_static)
{
var co = (CLRObject)GetManagedObject(ob);
info.SetValue(co.inst, newval);
}
else
{
info.SetValue(null, newval);
}
return(0);
}
catch (Exception e)
{
Exceptions.SetError(Exceptions.TypeError, e.Message);
return(-1);
}
}
/// <summary>
/// Implements __new__ for reflected classes and value types.
/// </summary>
public static IntPtr tp_new(IntPtr tp, IntPtr args, IntPtr kw)
{
var self = GetManagedObject(tp) as ClassObject;
// Sanity check: this ensures a graceful error if someone does
// something intentially wrong like use the managed metatype for
// a class that is not really derived from a managed class.
if (self == null)
{
return(Exceptions.RaiseTypeError("invalid object"));
}
Type type = self.type;
// Primitive types do not have constructors, but they look like
// they do from Python. If the ClassObject represents one of the
// convertible primitive types, just convert the arg directly.
if (type.IsPrimitive || type == typeof(string))
{
if (Runtime.PyTuple_Size(args) != 1)
{
Exceptions.SetError(Exceptions.TypeError, "no constructors match given arguments");
return(IntPtr.Zero);
}
IntPtr op = Runtime.PyTuple_GetItem(args, 0);
object result;
if (!Converter.ToManaged(op, type, out result, true))
{
return(IntPtr.Zero);
}
return(CLRObject.GetInstHandle(result, tp));
}
if (type.IsAbstract)
{
Exceptions.SetError(Exceptions.TypeError, "cannot instantiate abstract class");
return(IntPtr.Zero);
}
if (type.IsEnum)
{
Exceptions.SetError(Exceptions.TypeError, "cannot instantiate enumeration");
return(IntPtr.Zero);
}
object obj = self.binder.InvokeRaw(IntPtr.Zero, args, kw);
if (obj == null)
{
return(IntPtr.Zero);
}
return(CLRObject.GetInstHandle(obj, tp));
}
public static IntPtr tp_new(IntPtr tpRaw, IntPtr args, IntPtr kw)
{
if (kw != IntPtr.Zero)
{
return(Exceptions.RaiseTypeError("array constructor takes no keyword arguments"));
}
var tp = new BorrowedReference(tpRaw);
var self = GetManagedObject(tp) as ArrayObject;
if (!self.type.Valid)
{
return(Exceptions.RaiseTypeError(self.type.DeletedMessage));
}
Type arrType = self.type.Value;
long[] dimensions = new long[Runtime.PyTuple_Size(args)];
if (dimensions.Length == 0)
{
return(Exceptions.RaiseTypeError("array constructor requires at least one integer argument or an object convertible to array"));
}
if (dimensions.Length != 1)
{
return(CreateMultidimensional(arrType.GetElementType(), dimensions,
shapeTuple: new BorrowedReference(args),
pyType: tp)
.DangerousMoveToPointerOrNull());
}
IntPtr op = Runtime.PyTuple_GetItem(args, 0);
// create single dimensional array
if (Runtime.PyInt_Check(op))
{
dimensions[0] = Runtime.PyLong_AsSignedSize_t(op);
if (dimensions[0] == -1 && Exceptions.ErrorOccurred())
{
Exceptions.Clear();
}
else
{
return(NewInstance(arrType.GetElementType(), tp, dimensions)
.DangerousMoveToPointerOrNull());
}
}
object result;
// this implements casting to Array[T]
if (!Converter.ToManaged(op, arrType, out result, true))
{
return(IntPtr.Zero);
}
return(CLRObject.GetInstHandle(result, tp)
.DangerousGetAddress());
}
/// <summary>
/// AsManagedObject Method
/// </summary>
/// <remarks>
/// Return a managed object of the given type, based on the
/// value of the Python object.
/// </remarks>
public object AsManagedObject(Type t)
{
object result;
if (!Converter.ToManaged(obj, t, out result, false))
{
throw new InvalidCastException("cannot convert object to target type");
}
return(result);
}
/// <summary>
/// Helper function for ToArray and ToList that creates a IList out of iterable objects
/// </summary>
/// <param name="value"></param>
/// <param name="IterObject"></param>
/// <param name="obType"></param>
/// <param name="elementType"></param>
/// <param name="setError"></param>
/// <returns></returns>
private static IList MakeList(IntPtr value, IntPtr IterObject, Type obType, Type elementType, bool setError)
{
IList list;
try
{
// MakeGenericType can throw because elementType may not be a valid generic argument even though elementType[] is a valid array type.
// For example, if elementType is a pointer type.
// See https://docs.microsoft.com/en-us/dotnet/api/system.type.makegenerictype#System_Type_MakeGenericType_System_Type
var constructedListType = typeof(List <>).MakeGenericType(elementType);
bool IsSeqObj = Runtime.PySequence_Check(value);
if (IsSeqObj)
{
var len = Runtime.PySequence_Size(value);
list = (IList)Activator.CreateInstance(constructedListType, new Object[] { (int)len });
}
else
{
// CreateInstance can throw even if MakeGenericType succeeded.
// See https://docs.microsoft.com/en-us/dotnet/api/system.activator.createinstance#System_Activator_CreateInstance_System_Type_
list = (IList)Activator.CreateInstance(constructedListType);
}
}
catch (Exception e)
{
if (setError)
{
Exceptions.SetError(e);
SetConversionError(value, obType);
}
return(null);
}
IntPtr item;
var usedImplicit = false;
while ((item = Runtime.PyIter_Next(IterObject)) != IntPtr.Zero)
{
object obj;
if (!Converter.ToManaged(item, elementType, out obj, setError, out usedImplicit))
{
Runtime.XDecref(item);
return(null);
}
list.Add(obj);
Runtime.XDecref(item);
}
Runtime.XDecref(IterObject);
return(list);
}
private static NewReference NewEnum(Type type, BorrowedReference args, BorrowedReference tp)
{
nint argCount = Runtime.PyTuple_Size(args);
bool allowUnchecked = false;
if (argCount == 2)
{
var allow = Runtime.PyTuple_GetItem(args, 1);
if (!Converter.ToManaged(allow, typeof(bool), out var allowObj, true) || allowObj is null)
{
Exceptions.RaiseTypeError("second argument to enum constructor must be a boolean");
return(default);
public static NewReference tp_new(BorrowedReference tp, BorrowedReference args, BorrowedReference kw)
{
if (kw != null)
{
return(Exceptions.RaiseTypeError("array constructor takes no keyword arguments"));
}
var self = (ArrayObject)GetManagedObject(tp) !;
if (!self.type.Valid)
{
return(Exceptions.RaiseTypeError(self.type.DeletedMessage));
}
Type arrType = self.type.Value;
long[] dimensions = new long[Runtime.PyTuple_Size(args)];
if (dimensions.Length == 0)
{
return(Exceptions.RaiseTypeError("array constructor requires at least one integer argument or an object convertible to array"));
}
if (dimensions.Length != 1)
{
return(CreateMultidimensional(arrType.GetElementType(), dimensions,
shapeTuple: args,
pyType: tp));
}
BorrowedReference op = Runtime.PyTuple_GetItem(args, 0);
// create single dimensional array
if (Runtime.PyInt_Check(op))
{
dimensions[0] = Runtime.PyLong_AsSignedSize_t(op);
if (dimensions[0] == -1 && Exceptions.ErrorOccurred())
{
Exceptions.Clear();
}
else
{
return(NewInstance(arrType.GetElementType(), tp, dimensions));
}
}
// this implements casting to Array[T]
if (Converter.ToManaged(op, arrType, out object?result, true))
{
return(CLRObject.GetReference(result !, tp));
}
else
{
return(default);
/// <summary>
/// As Method
/// </summary>
/// <remarks>
/// Return a managed object of the given type, based on the
/// value of the Python object.
/// </remarks>
public T As <T>()
{
if (typeof(T) == typeof(PyObject) || typeof(T) == typeof(object))
{
return((T)(this as object));
}
object result;
if (!Converter.ToManaged(obj, typeof(T), out result, false))
{
throw new InvalidCastException("cannot convert object to target type");
}
return((T)result);
}
/// <summary>
/// Convert a Python value to a correctly typed managed array instance.
/// The Python value must support the Python iterator protocol or and the
/// items in the sequence must be convertible to the target array type.
/// </summary>
private static bool ToArray(IntPtr value, Type obType, out object result, bool setError)
{
Type elementType = obType.GetElementType();
result = null;
bool IsSeqObj = Runtime.PySequence_Check(value);
var len = IsSeqObj ? Runtime.PySequence_Size(value) : -1;
IntPtr IterObject = Runtime.PyObject_GetIter(value);
if (IterObject == IntPtr.Zero)
{
if (setError)
{
SetConversionError(value, obType);
}
return(false);
}
Array items;
var listType = typeof(List <>);
var constructedListType = listType.MakeGenericType(elementType);
IList list = IsSeqObj ? (IList)Activator.CreateInstance(constructedListType, new Object[] { (int)len }) :
(IList)Activator.CreateInstance(constructedListType);
IntPtr item;
while ((item = Runtime.PyIter_Next(IterObject)) != IntPtr.Zero)
{
object obj = null;
if (!Converter.ToManaged(item, elementType, out obj, true))
{
Runtime.XDecref(item);
return(false);
}
list.Add(obj);
Runtime.XDecref(item);
}
Runtime.XDecref(IterObject);
items = Array.CreateInstance(elementType, list.Count);
list.CopyTo(items, 0);
result = items;
return(true);
}
//====================================================================
// Convert a Python value to a correctly typed managed array instance.
// The Python value must support the Python sequence protocol and the
// items in the sequence must be convertible to the target array type.
//====================================================================
static bool ToArray(IntPtr value, Type obType, out Object result,
bool setError)
{
Type elementType = obType.GetElementType();
int size = Runtime.PySequence_Size(value);
result = null;
if (size < 0)
{
if (setError)
{
SetConversionError(value, obType);
}
return(false);
}
Array items = Array.CreateInstance(elementType, size);
// XXX - is there a better way to unwrap this if it is a real
// array?
for (int i = 0; i < size; i++)
{
Object obj = null;
IntPtr item = Runtime.PySequence_GetItem(value, i);
if (item == IntPtr.Zero)
{
if (setError)
{
SetConversionError(value, obType);
return(false);
}
}
if (!Converter.ToManaged(item, elementType, out obj, true))
{
Runtime.Decref(item);
return(false);
}
items.SetValue(obj, i);
Runtime.Decref(item);
}
result = items;
return(true);
}
public static IntPtr tp_new(IntPtr tp, IntPtr args, IntPtr kw)
{
var self = GetManagedObject(tp) as ArrayObject;
if (Runtime.Interop.PyTuple_Size(args) != 1)
{
return(Exceptions.RaiseTypeError("array expects 1 argument"));
}
IntPtr op = Runtime.Interop.PyTuple_GetItem(args, 0);
object result;
if (!Converter.ToManaged(op, self.type, out result, true))
{
return(IntPtr.Zero);
}
return(CLRObject.GetInstHandle(result, tp));
}
public object TrueDispatch(ArrayList args)
{
MethodInfo method = dtype.GetMethod("Invoke");
ParameterInfo[] pi = method.GetParameters();
IntPtr pyargs = Runtime.PyTuple_New(pi.Length);
Type rtype = method.ReturnType;
for (int i = 0; i < pi.Length; i++)
{
// Here we own the reference to the Python value, and we
// give the ownership to the arg tuple.
IntPtr arg = Converter.ToPython(args[i], pi[i].ParameterType);
Runtime.PyTuple_SetItem(pyargs, i, arg);
}
IntPtr op = Runtime.PyObject_Call(target, pyargs, IntPtr.Zero);
Runtime.Decref(pyargs);
if (op == IntPtr.Zero)
{
PythonException e = new PythonException();
throw e;
}
if (rtype == typeof(void))
{
return(null);
}
Object result = null;
if (!Converter.ToManaged(op, rtype, out result, false))
{
string s = "could not convert Python result to " +
rtype.ToString();
Runtime.Decref(op);
throw new ConversionException(s);
}
Runtime.Decref(op);
return(result);
}
/// <summary>
/// Implements __contains__ for dictionary types.
/// </summary>
public static int sq_contains(BorrowedReference ob, BorrowedReference v)
{
var obj = (CLRObject)GetManagedObject(ob);
var self = obj.inst;
var key = Tuple.Create(self.GetType(), "ContainsKey");
var methodInfo = methodsByType[key];
var parameters = methodInfo.GetParameters();
object arg;
if (!Converter.ToManaged(v, parameters[0].ParameterType, out arg, false))
{
Exceptions.SetError(Exceptions.TypeError,
$"invalid parameter type for sq_contains: should be {Converter.GetTypeByAlias(v)}, found {parameters[0].ParameterType}");
}
return((bool)methodInfo.Invoke(self, new[] { arg }) ? 1 : 0);
}
/// <summary>
/// Implements __contains__ for array types.
/// </summary>
public static int sq_contains(IntPtr ob, IntPtr v)
{
var obj = (CLRObject)GetManagedObject(ob);
Type itemType = obj.inst.GetType().GetElementType();
var items = obj.inst as IList;
object value;
if (!Converter.ToManaged(v, itemType, out value, false))
{
return(0);
}
if (items.Contains(value))
{
return(1);
}
return(0);
}
/// <summary>
/// Try to convert a Python argument object to a managed CLR type.
/// If unsuccessful, may set a Python error.
/// </summary>
/// <param name="op">Pointer to the Python argument object.</param>
/// <param name="parameterType">That parameter's managed type.</param>
/// <param name="arg">Converted argument.</param>
/// <param name="isOut">Whether the CLR type is passed by reference.</param>
/// <returns>true on success</returns>
static bool TryConvertArgument(IntPtr op, Type parameterType,
out object arg, out bool isOut)
{
arg = null;
isOut = false;
var clrtype = TryComputeClrArgumentType(parameterType, op);
if (clrtype == null)
{
return(false);
}
if (!Converter.ToManaged(op, clrtype, out arg, true))
{
return(false);
}
isOut = clrtype.IsByRef;
return(true);
}
/// <summary>
/// Helper method that will enumerate a Python sequence convert its values to the given
/// type and send them to the provided action
/// </summary>
private static bool ApplyActionToPySequence(IntPtr value,
Type obType,
bool setError,
int size,
Type elementType,
Action <object> action)
{
if (size < 0)
{
if (setError)
{
SetConversionError(value, obType);
}
return(false);
}
for (var i = 0; i < size; i++)
{
object obj = null;
IntPtr item = Runtime.PySequence_GetItem(value, i);
if (item == IntPtr.Zero)
{
if (setError)
{
SetConversionError(value, obType);
return(false);
}
}
if (!Converter.ToManaged(item, elementType, out obj, true))
{
Runtime.XDecref(item);
return(false);
}
action(obj);
Runtime.XDecref(item);
}
return(true);
}
static bool TryConvertArgument(IntPtr op, Type parameterType, bool needsResolution,
out object arg, out bool isOut)
{
arg = null;
isOut = false;
var clrtype = TryComputeClrArgumentType(parameterType, op, needsResolution: needsResolution);
if (clrtype == null)
{
return(false);
}
if (!Converter.ToManaged(op, clrtype, out arg, false))
{
Exceptions.Clear();
return(false);
}
isOut = clrtype.IsByRef;
return(true);
}
//====================================================================
// Implements __new__ for reflected classes and value types.
//====================================================================
public static IntPtr tp_new(IntPtr tp, IntPtr args, IntPtr kw)
{
ClassObject self = GetManagedObject(tp) as ClassObject;
// Sanity check: this ensures a graceful error if someone does
// something intentially wrong like use the managed metatype for
// a class that is not really derived from a managed class.
if (self == null)
{
return(Exceptions.RaiseTypeError("invalid object"));
}
Type type = self.type;
// Primitive types do not have constructors, but they look like
// they do from Python. If the ClassObject represents one of the
// convertible primitive types, just convert the arg directly.
if (type.IsPrimitive || type == typeof(String))
{
if (Runtime.PyTuple_Size(args) != 1)
{
Exceptions.SetError(Exceptions.TypeError,
"no constructors match given arguments"
);
return(IntPtr.Zero);
}
IntPtr op = Runtime.PyTuple_GetItem(args, 0);
Object result;
if (!Converter.ToManaged(op, type, out result, true))
{
return(IntPtr.Zero);
}
return(CLRObject.GetInstHandle(result, tp));
}
if (type.IsAbstract)
{
Exceptions.SetError(Exceptions.TypeError,
"cannot instantiate abstract class"
);
return(IntPtr.Zero);
}
if (type.IsEnum)
{
Exceptions.SetError(Exceptions.TypeError,
"cannot instantiate enumeration"
);
return(IntPtr.Zero);
}
Object obj = self.binder.InvokeRaw(IntPtr.Zero, args, kw);
if (obj == null)
{
// It is possible for __new__ to be invoked on construction
// of a Python subclass of a managed class, so args may
// reflect more args than are required to instantiate the
// class. So if we cant find a ctor that matches, we'll see
// if there is a default constructor and, if so, assume that
// any extra args are intended for the subclass' __init__.
IntPtr eargs = Runtime.PyTuple_New(0);
obj = self.binder.InvokeRaw(IntPtr.Zero, eargs, kw);
Runtime.Decref(eargs);
if (obj == null)
{
return(IntPtr.Zero);
}
}
return(CLRObject.GetInstHandle(obj, tp));
}
internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw,
MethodBase info, MethodInfo[] methodinfo)
{
// loop to find match, return invoker w/ or /wo error
MethodBase[] _methods = null;
int pynargs = Runtime.PyTuple_Size(args);
object arg;
bool isGeneric = false;
if (info != null)
{
_methods = (MethodBase[])Array.CreateInstance(
typeof(MethodBase), 1
);
_methods.SetValue(info, 0);
}
else
{
_methods = GetMethods();
}
for (int i = 0; i < _methods.Length; i++)
{
MethodBase mi = _methods[i];
if (mi.IsGenericMethod)
{
isGeneric = true;
}
ParameterInfo[] pi = mi.GetParameters();
int clrnargs = pi.Length;
bool match = false;
int arrayStart = -1;
int outs = 0;
if (pynargs == clrnargs)
{
match = true;
}
else if ((pynargs > clrnargs) && (clrnargs > 0) &&
(pi[clrnargs - 1].ParameterType.IsArray))
{
// The last argument of the mananged functions seems to
// accept multiple arguments as a array. Hopefully it's a
// spam(params object[] egg) style method
match = true;
arrayStart = clrnargs - 1;
}
if (match)
{
Object[] margs = new Object[clrnargs];
for (int n = 0; n < clrnargs; n++)
{
IntPtr op;
if (arrayStart == n)
{
// map remaining Python arguments to a tuple since
// the managed function accepts it - hopefully :]
op = Runtime.PyTuple_GetSlice(args, arrayStart, pynargs);
}
else
{
op = Runtime.PyTuple_GetItem(args, n);
}
Type type = pi[n].ParameterType;
if (pi[n].IsOut || type.IsByRef)
{
outs++;
}
if (!Converter.ToManaged(op, type, out arg, false))
{
Exceptions.Clear();
margs = null;
break;
}
if (arrayStart == n)
{
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.Decref(op);
}
margs[n] = arg;
}
if (margs == null)
{
continue;
}
Object target = null;
if ((!mi.IsStatic) && (inst != IntPtr.Zero))
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
CLRObject co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
return(new Binding(mi, target, margs, outs));
}
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && (info == null) && (methodinfo != null))
{
Type[] types = Runtime.PythonArgsToTypeArray(args, true);
MethodInfo mi = MethodBinder.MatchParameters(methodinfo, types);
return(Bind(inst, args, kw, mi, null));
}
return(null);
}
private object?TrueDispatch(object?[] args)
{
MethodInfo method = dtype.GetMethod("Invoke");
ParameterInfo[] pi = method.GetParameters();
Type rtype = method.ReturnType;
NewReference callResult;
using (var pyargs = Runtime.PyTuple_New(pi.Length))
{
for (var i = 0; i < pi.Length; i++)
{
// Here we own the reference to the Python value, and we
// give the ownership to the arg tuple.
using var arg = Converter.ToPython(args[i], pi[i].ParameterType);
int res = Runtime.PyTuple_SetItem(pyargs.Borrow(), i, arg.StealOrThrow());
if (res != 0)
{
throw PythonException.ThrowLastAsClrException();
}
}
callResult = Runtime.PyObject_Call(target, pyargs.Borrow(), null);
}
if (callResult.IsNull())
{
throw PythonException.ThrowLastAsClrException();
}
using (callResult)
{
BorrowedReference op = callResult.Borrow();
int byRefCount = pi.Count(parameterInfo => parameterInfo.ParameterType.IsByRef);
if (byRefCount > 0)
{
// By symmetry with MethodBinder.Invoke, when there are out
// parameters we expect to receive a tuple containing
// the result, if any, followed by the out parameters. If there is only
// one out parameter and the return type of the method is void,
// we instead receive the out parameter as the result from Python.
bool isVoid = rtype == typeof(void);
int tupleSize = byRefCount + (isVoid ? 0 : 1);
if (isVoid && byRefCount == 1)
{
// The return type is void and there is a single out parameter.
for (int i = 0; i < pi.Length; i++)
{
Type t = pi[i].ParameterType;
if (t.IsByRef)
{
if (!Converter.ToManaged(op, t, out args[i], true))
{
Exceptions.RaiseTypeError($"The Python function did not return {t.GetElementType()} (the out parameter type)");
throw PythonException.ThrowLastAsClrException();
}
break;
}
}
return(null);
}
else if (Runtime.PyTuple_Check(op) && Runtime.PyTuple_Size(op) == tupleSize)
{
int index = isVoid ? 0 : 1;
for (int i = 0; i < pi.Length; i++)
{
Type t = pi[i].ParameterType;
if (t.IsByRef)
{
BorrowedReference item = Runtime.PyTuple_GetItem(op, index++);
if (!Converter.ToManaged(item, t, out args[i], true))
{
Exceptions.RaiseTypeError($"The Python function returned a tuple where element {i} was not {t.GetElementType()} (the out parameter type)");
throw PythonException.ThrowLastAsClrException();
}
}
}
if (isVoid)
{
return(null);
}
BorrowedReference item0 = Runtime.PyTuple_GetItem(op, 0);
if (!Converter.ToManaged(item0, rtype, out object?result0, true))
{
Exceptions.RaiseTypeError($"The Python function returned a tuple where element 0 was not {rtype} (the return type)");
throw PythonException.ThrowLastAsClrException();
}
return(result0);
}
else
{
string tpName = Runtime.PyObject_GetTypeName(op);
if (Runtime.PyTuple_Check(op))
{
tpName += $" of size {Runtime.PyTuple_Size(op)}";
}
StringBuilder sb = new StringBuilder();
if (!isVoid)
{
sb.Append(rtype.FullName);
}
for (int i = 0; i < pi.Length; i++)
{
Type t = pi[i].ParameterType;
if (t.IsByRef)
{
if (sb.Length > 0)
{
sb.Append(",");
}
sb.Append(t.GetElementType().FullName);
}
}
string returnValueString = isVoid ? "" : "the return value and ";
Exceptions.RaiseTypeError($"Expected a tuple ({sb}) of {returnValueString}the values for out and ref parameters, got {tpName}.");
throw PythonException.ThrowLastAsClrException();
}
}
if (rtype == typeof(void))
{
return(null);
}
if (!Converter.ToManaged(op, rtype, out object?result, true))
{
throw PythonException.ThrowLastAsClrException();
}
return(result);
}
}
/// <summary>
/// Convert a Python value to a correctly typed managed array instance.
/// The Python value must support the Python iterator protocol or and the
/// items in the sequence must be convertible to the target array type.
/// </summary>
private static bool ToArray(BorrowedReference value, Type obType, out object?result, bool setError)
{
Type elementType = obType.GetElementType();
result = null;
using var IterObject = Runtime.PyObject_GetIter(value);
if (IterObject.IsNull())
{
if (setError)
{
SetConversionError(value, obType);
}
else
{
// PyObject_GetIter will have set an error
Exceptions.Clear();
}
return(false);
}
IList list;
try
{
// MakeGenericType can throw because elementType may not be a valid generic argument even though elementType[] is a valid array type.
// For example, if elementType is a pointer type.
// See https://docs.microsoft.com/en-us/dotnet/api/system.type.makegenerictype#System_Type_MakeGenericType_System_Type
var constructedListType = typeof(List <>).MakeGenericType(elementType);
bool IsSeqObj = Runtime.PySequence_Check(value);
object[] constructorArgs = Array.Empty <object>();
if (IsSeqObj)
{
var len = Runtime.PySequence_Size(value);
if (len >= 0)
{
if (len <= int.MaxValue)
{
constructorArgs = new object[] { (int)len };
}
}
else
{
// for the sequences, that explicitly deny calling __len__()
Exceptions.Clear();
}
}
// CreateInstance can throw even if MakeGenericType succeeded.
// See https://docs.microsoft.com/en-us/dotnet/api/system.activator.createinstance#System_Activator_CreateInstance_System_Type_
list = (IList)Activator.CreateInstance(constructedListType, args: constructorArgs);
}
catch (Exception e)
{
if (setError)
{
Exceptions.SetError(e);
SetConversionError(value, obType);
}
return(false);
}
while (true)
{
using var item = Runtime.PyIter_Next(IterObject.Borrow());
if (item.IsNull())
{
break;
}
if (!Converter.ToManaged(item.Borrow(), elementType, out var obj, setError))
{
return(false);
}
list.Add(obj);
}
if (Exceptions.ErrorOccurred())
{
if (!setError)
{
Exceptions.Clear();
}
return(false);
}
Array items = Array.CreateInstance(elementType, list.Count);
list.CopyTo(items, 0);
result = items;
return(true);
}
internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo)
{
// Relevant function variables used post conversion
var isGeneric = false;
Binding bindingUsingImplicitConversion = null;
// If we have KWArgs create dictionary and collect them
Dictionary <string, IntPtr> kwArgDict = null;
if (kw != IntPtr.Zero)
{
var pyKwArgsCount = (int)Runtime.PyDict_Size(kw);
kwArgDict = new Dictionary <string, IntPtr>(pyKwArgsCount);
IntPtr keylist = Runtime.PyDict_Keys(kw);
IntPtr valueList = Runtime.PyDict_Values(kw);
for (int i = 0; i < pyKwArgsCount; ++i)
{
var keyStr = Runtime.GetManagedString(Runtime.PyList_GetItem(new BorrowedReference(keylist), i));
kwArgDict[keyStr] = Runtime.PyList_GetItem(new BorrowedReference(valueList), i).DangerousGetAddress();
}
Runtime.XDecref(keylist);
Runtime.XDecref(valueList);
}
// Fetch our methods we are going to attempt to match and bind too.
var methods = info == null?GetMethods()
: new List <MethodInformation>(1)
{
new MethodInformation(info, info.GetParameters())
};
foreach (var methodInformation in methods)
{
// Relevant method variables
var mi = methodInformation.MethodBase;
var pi = methodInformation.ParameterInfo;
isGeneric = mi.IsGenericMethod;
int pyArgCount = (int)Runtime.PyTuple_Size(args);
// Special case for operators
bool isOperator = OperatorMethod.IsOperatorMethod(mi);
// Binary operator methods will have 2 CLR args but only one Python arg
// (unary operators will have 1 less each), since Python operator methods are bound.
isOperator = isOperator && pyArgCount == pi.Length - 1;
bool isReverse = isOperator && OperatorMethod.IsReverse((MethodInfo)mi); // Only cast if isOperator.
if (isReverse && OperatorMethod.IsComparisonOp((MethodInfo)mi))
{
continue; // Comparison operators in Python have no reverse mode.
}
// Preprocessing pi to remove either the first or second argument.
if (isOperator && !isReverse)
{
// The first Python arg is the right operand, while the bound instance is the left.
// We need to skip the first (left operand) CLR argument.
pi = pi.Skip(1).ToArray();
}
else if (isOperator && isReverse)
{
// The first Python arg is the left operand.
// We need to take the first CLR argument.
pi = pi.Take(1).ToArray();
}
// Must be done after IsOperator section
int clrArgCount = pi.Length;
if (CheckMethodArgumentsMatch(clrArgCount,
pyArgCount,
kwArgDict,
pi,
out bool paramsArray,
out ArrayList defaultArgList))
{
var outs = 0;
var margs = new object[clrArgCount];
int paramsArrayIndex = paramsArray ? pi.Length - 1 : -1; // -1 indicates no paramsArray
var usedImplicitConversion = false;
// Conversion loop for each parameter
for (int paramIndex = 0; paramIndex < clrArgCount; paramIndex++)
{
IntPtr op = IntPtr.Zero; // Python object to be converted; not yet set
var parameter = pi[paramIndex]; // Clr parameter we are targeting
object arg; // Python -> Clr argument
// Check our KWargs for this parameter
bool hasNamedParam = kwArgDict == null ? false : kwArgDict.TryGetValue(parameter.Name, out op);
bool isNewReference = false;
// Check if we are going to use default
if (paramIndex >= pyArgCount && !(hasNamedParam || (paramsArray && paramIndex == paramsArrayIndex)))
{
if (defaultArgList != null)
{
margs[paramIndex] = defaultArgList[paramIndex - pyArgCount];
}
continue;
}
// At this point, if op is IntPtr.Zero we don't have a KWArg and are not using default
if (op == IntPtr.Zero)
{
// If we have reached the paramIndex
if (paramsArrayIndex == paramIndex)
{
op = HandleParamsArray(args, paramsArrayIndex, pyArgCount, out isNewReference);
}
else
{
op = Runtime.PyTuple_GetItem(args, paramIndex);
}
}
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
Type clrtype = null;
IntPtr pyoptype;
if (methods.Count > 1)
{
pyoptype = IntPtr.Zero;
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
clrtype = Converter.GetTypeByAlias(pyoptype);
}
Runtime.XDecref(pyoptype);
}
if (clrtype != null)
{
var typematch = false;
if ((parameter.ParameterType != typeof(object)) && (parameter.ParameterType != clrtype))
{
IntPtr pytype = Converter.GetPythonTypeByAlias(parameter.ParameterType);
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
if (pytype != pyoptype)
{
typematch = false;
}
else
{
typematch = true;
clrtype = parameter.ParameterType;
}
}
if (!typematch)
{
// this takes care of nullables
var underlyingType = Nullable.GetUnderlyingType(parameter.ParameterType);
if (underlyingType == null)
{
underlyingType = parameter.ParameterType;
}
// this takes care of enum values
TypeCode argtypecode = Type.GetTypeCode(underlyingType);
TypeCode paramtypecode = Type.GetTypeCode(clrtype);
if (argtypecode == paramtypecode)
{
typematch = true;
clrtype = parameter.ParameterType;
}
// accepts non-decimal numbers in decimal parameters
if (underlyingType == typeof(decimal))
{
clrtype = parameter.ParameterType;
typematch = Converter.ToManaged(op, clrtype, out arg, false);
}
// this takes care of implicit conversions
var opImplicit = parameter.ParameterType.GetMethod("op_Implicit", new[] { clrtype });
if (opImplicit != null)
{
usedImplicitConversion = typematch = opImplicit.ReturnType == parameter.ParameterType;
clrtype = parameter.ParameterType;
}
}
Runtime.XDecref(pyoptype);
if (!typematch)
{
margs = null;
break;
}
}
else
{
clrtype = parameter.ParameterType;
}
}
else
{
clrtype = parameter.ParameterType;
}
if (parameter.IsOut || clrtype.IsByRef)
{
outs++;
}
if (!Converter.ToManaged(op, clrtype, out arg, false))
{
Exceptions.Clear();
margs = null;
break;
}
if (isNewReference)
{
// TODO: is this a bug? Should this happen even if the conversion fails?
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.XDecref(op);
}
margs[paramIndex] = arg;
}
if (margs == null)
{
continue;
}
if (isOperator)
{
if (inst != IntPtr.Zero)
{
if (ManagedType.GetManagedObject(inst) is CLRObject co)
{
bool isUnary = pyArgCount == 0;
// Postprocessing to extend margs.
var margsTemp = isUnary ? new object[1] : new object[2];
// If reverse, the bound instance is the right operand.
int boundOperandIndex = isReverse ? 1 : 0;
// If reverse, the passed instance is the left operand.
int passedOperandIndex = isReverse ? 0 : 1;
margsTemp[boundOperandIndex] = co.inst;
if (!isUnary)
{
margsTemp[passedOperandIndex] = margs[0];
}
margs = margsTemp;
}
else
{
continue;
}
}
}
object target = null;
if (!mi.IsStatic && inst != IntPtr.Zero)
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
var co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
var binding = new Binding(mi, target, margs, outs);
if (usedImplicitConversion)
{
// lets just keep the first binding using implicit conversion
// this is to respect method order/precedence
if (bindingUsingImplicitConversion == null)
{
// in this case we will not return the binding yet in case there is a match
// which does not use implicit conversions, which will return directly
bindingUsingImplicitConversion = binding;
}
}
else
{
return(binding);
}
}
}
// if we generated a binding using implicit conversion return it
if (bindingUsingImplicitConversion != null)
{
return(bindingUsingImplicitConversion);
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && info == null && methodinfo != null)
{
Type[] types = Runtime.PythonArgsToTypeArray(args, true);
MethodInfo mi = MatchParameters(methodinfo, types);
return(Bind(inst, args, kw, mi, null));
}
return(null);
}
internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo)
{
// loop to find match, return invoker w/ or /wo error
int pynargs = Runtime.PyTuple_Size(args);
object arg;
var isGeneric = false;
ArrayList defaultArgList;
Type clrtype;
Binding bindingUsingImplicitConversion = null;
var methods = info == null?GetMethods()
: new List <MethodInformation>(1)
{
new MethodInformation(info, info.GetParameters())
};
// TODO: Clean up
foreach (var methodInformation in methods)
{
var mi = methodInformation.MethodBase;
var pi = methodInformation.ParameterInfo;
if (mi.IsGenericMethod)
{
isGeneric = true;
}
int clrnargs = pi.Length;
int arrayStart;
if (CheckMethodArgumentsMatch(clrnargs,
pynargs,
pi,
out arrayStart,
out defaultArgList))
{
var outs = 0;
var margs = new object[clrnargs];
var usedImplicitConversion = false;
for (var n = 0; n < clrnargs; n++)
{
IntPtr op;
if (n < pynargs)
{
if (arrayStart == n)
{
// map remaining Python arguments to a tuple since
// the managed function accepts it - hopefully :]
op = Runtime.PyTuple_GetSlice(args, arrayStart, pynargs);
}
else
{
op = Runtime.PyTuple_GetItem(args, n);
}
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
clrtype = null;
IntPtr pyoptype;
if (methods.Count > 1)
{
pyoptype = IntPtr.Zero;
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
clrtype = Converter.GetTypeByAlias(pyoptype);
}
Runtime.XDecref(pyoptype);
}
if (clrtype != null)
{
var typematch = false;
if ((pi[n].ParameterType != typeof(object)) && (pi[n].ParameterType != clrtype))
{
IntPtr pytype = Converter.GetPythonTypeByAlias(pi[n].ParameterType);
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
if (pytype != pyoptype)
{
typematch = false;
}
else
{
typematch = true;
clrtype = pi[n].ParameterType;
}
}
if (!typematch)
{
// this takes care of nullables
var underlyingType = Nullable.GetUnderlyingType(pi[n].ParameterType);
if (underlyingType == null)
{
underlyingType = pi[n].ParameterType;
}
// this takes care of enum values
TypeCode argtypecode = Type.GetTypeCode(underlyingType);
TypeCode paramtypecode = Type.GetTypeCode(clrtype);
if (argtypecode == paramtypecode)
{
typematch = true;
clrtype = pi[n].ParameterType;
}
// accepts non-decimal numbers in decimal parameters
if (underlyingType == typeof(decimal))
{
clrtype = pi[n].ParameterType;
typematch = Converter.ToManaged(op, clrtype, out arg, false);
}
// this takes care of implicit conversions
var opImplicit = pi[n].ParameterType.GetMethod("op_Implicit", new[] { clrtype });
if (opImplicit != null)
{
usedImplicitConversion = typematch = opImplicit.ReturnType == pi[n].ParameterType;
clrtype = pi[n].ParameterType;
}
}
Runtime.XDecref(pyoptype);
if (!typematch)
{
margs = null;
break;
}
}
else
{
typematch = true;
clrtype = pi[n].ParameterType;
}
}
else
{
clrtype = pi[n].ParameterType;
}
if (pi[n].IsOut || clrtype.IsByRef)
{
outs++;
}
if (!Converter.ToManaged(op, clrtype, out arg, false))
{
Exceptions.Clear();
margs = null;
break;
}
if (arrayStart == n)
{
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.XDecref(op);
}
margs[n] = arg;
}
else
{
if (defaultArgList != null)
{
margs[n] = defaultArgList[n - pynargs];
}
}
}
if (margs == null)
{
continue;
}
object target = null;
if (!mi.IsStatic && inst != IntPtr.Zero)
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
var co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
var binding = new Binding(mi, target, margs, outs);
if (usedImplicitConversion)
{
// lets just keep the first binding using implicit conversion
// this is to respect method order/precedence
if (bindingUsingImplicitConversion == null)
{
// in this case we will not return the binding yet in case there is a match
// which does not use implicit conversions, which will return directly
bindingUsingImplicitConversion = binding;
}
}
else
{
return(binding);
}
}
}
// if we generated a binding using implicit conversion return it
if (bindingUsingImplicitConversion != null)
{
return(bindingUsingImplicitConversion);
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && info == null && methodinfo != null)
{
Type[] types = Runtime.PythonArgsToTypeArray(args, true);
MethodInfo mi = MatchParameters(methodinfo, types);
return(Bind(inst, args, kw, mi, null));
}
return(null);
}
internal Binding Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo)
{
// loop to find match, return invoker w/ or /wo error
MethodBase[] _methods = null;
int pynargs = Runtime.PyTuple_Size(args);
object arg;
var isGeneric = false;
ArrayList defaultArgList = null;
if (info != null)
{
_methods = new MethodBase[1];
_methods.SetValue(info, 0);
}
else
{
_methods = GetMethods();
}
Type clrtype;
// TODO: Clean up
foreach (MethodBase mi in _methods)
{
if (mi.IsGenericMethod)
{
isGeneric = true;
}
ParameterInfo[] pi = mi.GetParameters();
int clrnargs = pi.Length;
var match = false;
int arrayStart = -1;
var outs = 0;
if (pynargs == clrnargs)
{
match = true;
}
else if (pynargs < clrnargs)
{
match = true;
defaultArgList = new ArrayList();
for (int v = pynargs; v < clrnargs; v++)
{
if (pi[v].DefaultValue == DBNull.Value)
{
match = false;
}
else
{
defaultArgList.Add(pi[v].DefaultValue);
}
}
}
else if (pynargs > clrnargs && clrnargs > 0 &&
Attribute.IsDefined(pi[clrnargs - 1], typeof(ParamArrayAttribute)))
{
// This is a `foo(params object[] bar)` style method
match = true;
arrayStart = clrnargs - 1;
}
if (match)
{
var margs = new object[clrnargs];
for (var n = 0; n < clrnargs; n++)
{
IntPtr op;
if (n < pynargs)
{
if (arrayStart == n)
{
// map remaining Python arguments to a tuple since
// the managed function accepts it - hopefully :]
op = Runtime.PyTuple_GetSlice(args, arrayStart, pynargs);
}
else
{
op = Runtime.PyTuple_GetItem(args, n);
}
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
clrtype = null;
IntPtr pyoptype;
if (_methods.Length > 1)
{
pyoptype = IntPtr.Zero;
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
clrtype = Converter.GetTypeByAlias(pyoptype);
}
Runtime.XDecref(pyoptype);
}
if (clrtype != null)
{
var typematch = false;
if ((pi[n].ParameterType != typeof(object)) && (pi[n].ParameterType != clrtype))
{
IntPtr pytype = Converter.GetPythonTypeByAlias(pi[n].ParameterType);
pyoptype = Runtime.PyObject_Type(op);
Exceptions.Clear();
if (pyoptype != IntPtr.Zero)
{
if (pytype != pyoptype)
{
typematch = false;
}
else
{
typematch = true;
clrtype = pi[n].ParameterType;
}
}
if (!typematch)
{
// this takes care of nullables
var underlyingType = Nullable.GetUnderlyingType(pi[n].ParameterType);
if (underlyingType == null)
{
underlyingType = pi[n].ParameterType;
}
// this takes care of enum values
TypeCode argtypecode = Type.GetTypeCode(underlyingType);
TypeCode paramtypecode = Type.GetTypeCode(clrtype);
if (argtypecode == paramtypecode)
{
typematch = true;
clrtype = pi[n].ParameterType;
}
// this takes care of implicit conversions
var opImplicit = pi[n].ParameterType.GetMethod("op_Implicit", new[] { clrtype });
if (opImplicit != null)
{
typematch = opImplicit.ReturnType == pi[n].ParameterType;
clrtype = pi[n].ParameterType;
}
}
Runtime.XDecref(pyoptype);
if (!typematch)
{
margs = null;
break;
}
}
else
{
typematch = true;
clrtype = pi[n].ParameterType;
}
}
else
{
clrtype = pi[n].ParameterType;
}
if (pi[n].IsOut || clrtype.IsByRef)
{
outs++;
}
if (!Converter.ToManaged(op, clrtype, out arg, false))
{
Exceptions.Clear();
margs = null;
break;
}
if (arrayStart == n)
{
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.XDecref(op);
}
margs[n] = arg;
}
else
{
if (defaultArgList != null)
{
margs[n] = defaultArgList[n - pynargs];
}
}
}
if (margs == null)
{
continue;
}
object target = null;
if (!mi.IsStatic && inst != IntPtr.Zero)
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
var co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
return(new Binding(mi, target, margs, outs));
}
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && info == null && methodinfo != null)
{
Type[] types = Runtime.PythonArgsToTypeArray(args, true);
MethodInfo mi = MatchParameters(methodinfo, types);
return(Bind(inst, args, kw, mi, null));
}
return(null);
}
internal Binding Bind(IntPtr inst, IntPtr pythonParametersPtr, IntPtr kw, MethodBase info, MethodInfo[] methodInfoArray)
{
// loop to find match, return invoker w/ or /wo error
MethodBase[] _methods = null;
// NOTE: return the size of the args pointer (the number of parameter from the python call)
int pythonParameterCount = Runtime.PyTuple_Size(pythonParametersPtr);
//WHY: Why is that so widely scoped ?
object pythonManagedParameterPtr;
var isGeneric = false;
ArrayList defaultParameterList = null;
if (info != null)
{
// NOTE: If a MethodBase object has been provided, create an array with only it.
// WHY a method base is provided some times and not other ? (ex: when call a genric with a type in [])
_methods = new MethodBase[1];
_methods.SetValue(info, 0);
}
else
{
// NOTE: Create an array of MethodBase from teh called method/constructor
// WHY not use the methodinfo provided?
_methods = GetMethods();
}
//WHY is it so widely scoped
Type clrConvertedParameterType;
// TODO: Clean up
foreach (MethodBase methodInfo in _methods)
{
//WHY not just do isGeneric = mi.IsGenericMethod or use it directly ?
if (methodInfo.IsGenericMethod)
{
isGeneric = true;
}
//NOTE: Get the parameter from the current MethodBase
//NOTE: MethodInfo Ok
ParameterInfo[] clrParameterInfoArray = methodInfo.GetParameters();
//NOTE: Get the number of clr parameters
int clrParameterCount = clrParameterInfoArray.Length;
var paramCountMatch = false;
//REFACTOR: Use var like the other local variables
var clrHasParamArray = false;
var clrParamsArrayStart = -1;
var byRefCount = 0;
if (pythonParameterCount == clrParameterCount)
{
paramCountMatch = true;
}
else if (pythonParameterCount < clrParameterCount)
{
paramCountMatch = true;
defaultParameterList = new ArrayList();
for (int v = pythonParameterCount; v < clrParameterCount; v++)
{
if (clrParameterInfoArray[v].DefaultValue == DBNull.Value)
{
paramCountMatch = false;
}
else
{
defaultParameterList.Add(clrParameterInfoArray[v].DefaultValue);
}
}
}
else if (pythonParameterCount > clrParameterCount && clrParameterCount > 0 &&
Attribute.IsDefined(clrParameterInfoArray[clrParameterCount - 1], typeof(ParamArrayAttribute)))
{
// This is a `foo({...}, params object[] bar)` style method
paramCountMatch = true;
clrHasParamArray = true;
clrParamsArrayStart = clrParameterCount - 1;
}
if (paramCountMatch)
{
var methodParametersPtrArray = new object[clrParameterCount];
for (var n = 0; n < clrParameterCount; n++)
{
IntPtr pythonParameterPtr;
if (n < pythonParameterCount)
{
if (clrParamsArrayStart == n)
{
// map remaining Python arguments to a tuple since
// the managed function accepts it - hopefully :]
//WHY: Hmmm it returns a lot of python paramter as one. isn't there a problem later ?
pythonParameterPtr = Runtime.PyTuple_GetSlice(pythonParametersPtr, clrParamsArrayStart, pythonParameterCount);
}
else
{
pythonParameterPtr = Runtime.PyTuple_GetItem(pythonParametersPtr, n);
}
// this logic below handles cases when multiple overloading methods
// are ambiguous, hence comparison between Python and CLR types
// is necessary
clrConvertedParameterType = null;
IntPtr pythonParameterPtrType = IntPtr.Zero;
if (_methods.Length > 1)
{
pythonParameterPtrType = Runtime.PyObject_Type(pythonParameterPtr);
Exceptions.Clear();
if (pythonParameterPtrType != IntPtr.Zero)
{
clrConvertedParameterType = Converter.GetTypeByAlias(pythonParameterPtrType);
}
Runtime.XDecref(pythonParameterPtrType);
}
if (clrConvertedParameterType != null)
{
var parameterTypeMatch = false;
if ((clrParameterInfoArray[n].ParameterType != typeof(object)) && (clrParameterInfoArray[n].ParameterType != clrConvertedParameterType))
{
IntPtr pythonConvertedParameterPtrType = Converter.GetPythonTypeByAlias(clrParameterInfoArray[n].ParameterType);
pythonParameterPtrType = Runtime.PyObject_Type(pythonParameterPtr);
Exceptions.Clear();
if (pythonParameterPtrType != IntPtr.Zero)
{
if (pythonConvertedParameterPtrType != pythonParameterPtrType)
{
parameterTypeMatch = false;
}
else
{
parameterTypeMatch = true;
clrConvertedParameterType = clrParameterInfoArray[n].ParameterType;
}
}
if (!parameterTypeMatch)
{
// this takes care of enum values
TypeCode clrParameterTypeCode = Type.GetTypeCode(clrParameterInfoArray[n].ParameterType);
TypeCode clrConvertedParameterTypeCode = Type.GetTypeCode(clrConvertedParameterType);
if (clrParameterTypeCode == clrConvertedParameterTypeCode)
{
parameterTypeMatch = true;
clrConvertedParameterType = clrParameterInfoArray[n].ParameterType;
}
}
Runtime.XDecref(pythonParameterPtrType);
if (!parameterTypeMatch)
{
methodParametersPtrArray = null;
break;
}
}
else
{
parameterTypeMatch = true;
clrConvertedParameterType = clrParameterInfoArray[n].ParameterType;
}
}
else
{
clrConvertedParameterType = clrParameterInfoArray[n].ParameterType;
}
if (clrParameterInfoArray[n].IsOut || clrConvertedParameterType.IsByRef)
{
byRefCount++;
}
if (!Converter.ToManaged(pythonParameterPtr, clrConvertedParameterType, out pythonManagedParameterPtr, false))
{
Exceptions.Clear();
methodParametersPtrArray = null;
break;
}
if (clrParamsArrayStart == n)
{
// GetSlice() creates a new reference but GetItem()
// returns only a borrow reference.
Runtime.XDecref(pythonParameterPtr);
}
methodParametersPtrArray[n] = pythonParameterPtr;
}
else
{
if (defaultParameterList != null)
{
methodParametersPtrArray[n] = defaultParameterList[n - pythonParameterCount];
}
}
}
if (methodParametersPtrArray == null)
{
continue;
}
object target = null;
if (!methodInfo.IsStatic && inst != IntPtr.Zero)
{
//CLRObject co = (CLRObject)ManagedType.GetManagedObject(inst);
// InvalidCastException: Unable to cast object of type
// 'Python.Runtime.ClassObject' to type 'Python.Runtime.CLRObject'
var co = ManagedType.GetManagedObject(inst) as CLRObject;
// Sanity check: this ensures a graceful exit if someone does
// something intentionally wrong like call a non-static method
// on the class rather than on an instance of the class.
// XXX maybe better to do this before all the other rigmarole.
if (co == null)
{
return(null);
}
target = co.inst;
}
return(new Binding(methodInfo, target, methodParametersPtrArray, byRefCount));
}
}
// We weren't able to find a matching method but at least one
// is a generic method and info is null. That happens when a generic
// method was not called using the [] syntax. Let's introspect the
// type of the arguments and use it to construct the correct method.
if (isGeneric && info == null && methodInfoArray != null)
{
Type[] types = Runtime.PythonArgsToTypeArray(pythonParametersPtr, true);
MethodInfo mi = MatchParameters(methodInfoArray, types);
return(Bind(inst, pythonParametersPtr, kw, mi, null));
}
return(null);
}
public override bool TryConvert(ConvertBinder binder, out object result)
{
return(Converter.ToManaged(this.obj, binder.Type, out result, false));
}
/// <summary>
/// Descriptor __set__ implementation. This method sets the value of
/// a property based on the given Python value. The Python value must
/// be convertible to the type of the property.
/// </summary>
public new static int tp_descr_set(IntPtr ds, IntPtr ob, IntPtr val)
{
var self = (PropertyObject)GetManagedObject(ds);
MethodInfo setter = self.setter;
object newval;
if (val == IntPtr.Zero)
{
Exceptions.RaiseTypeError("cannot delete property");
return(-1);
}
if (setter == null)
{
Exceptions.RaiseTypeError("property is read-only");
return(-1);
}
if (!Converter.ToManaged(val, self.info.PropertyType, out newval, true))
{
return(-1);
}
bool is_static = setter.IsStatic;
if (ob == IntPtr.Zero || ob == Runtime.PyNone)
{
if (!is_static)
{
Exceptions.RaiseTypeError("instance property must be set on an instance");
return(-1);
}
}
try
{
if (!is_static)
{
var co = GetManagedObject(ob) as CLRObject;
if (co == null)
{
Exceptions.RaiseTypeError("invalid target");
return(-1);
}
self.info.SetValue(co.inst, newval, null);
}
else
{
self.info.SetValue(null, newval, null);
}
return(0);
}
catch (Exception e)
{
if (e.InnerException != null)
{
e = e.InnerException;
}
Exceptions.SetError(e);
return(-1);
}
}
/// <summary>
/// Implements __setitem__ for array types.
/// </summary>
public static int mp_ass_subscript(IntPtr ob, IntPtr idx, IntPtr v)
{
var obj = (CLRObject)GetManagedObject(ob);
var items = obj.inst as Array;
Type itemType = obj.inst.GetType().GetElementType();
int rank = items.Rank;
int index;
object value;
if (items.IsReadOnly)
{
Exceptions.RaiseTypeError("array is read-only");
return(-1);
}
if (!Converter.ToManaged(v, itemType, out value, true))
{
return(-1);
}
if (rank == 1)
{
index = Runtime.Interop.PyInt_AsLong(idx);
if (Exceptions.ErrorOccurred())
{
Exceptions.RaiseTypeError("invalid index value");
return(-1);
}
if (index < 0)
{
index = items.Length + index;
}
try
{
items.SetValue(value, index);
}
catch (IndexOutOfRangeException)
{
Exceptions.SetError(Exceptions.IndexError, "array index out of range");
return(-1);
}
return(0);
}
if (!Runtime.PyTuple_Check(idx))
{
Exceptions.RaiseTypeError("invalid index value");
return(-1);
}
int count = Runtime.Interop.PyTuple_Size(idx);
var args = new int[count];
for (var i = 0; i < count; i++)
{
IntPtr op = Runtime.Interop.PyTuple_GetItem(idx, i);
index = Runtime.Interop.PyInt_AsLong(op);
if (Exceptions.ErrorOccurred())
{
Exceptions.RaiseTypeError("invalid index value");
return(-1);
}
if (index < 0)
{
index = items.GetLength(i) + index;
}
args.SetValue(index, i);
}
try
{
items.SetValue(value, args);
}
catch (IndexOutOfRangeException)
{
Exceptions.SetError(Exceptions.IndexError, "array index out of range");
return(-1);
}
return(0);
}
/// <summary>
/// Descriptor __set__ implementation. This method sets the value of
/// a property based on the given Python value. The Python value must
/// be convertible to the type of the property.
/// </summary>
public new static int tp_descr_set(IntPtr ds, IntPtr ob, IntPtr val)
{
var self = (PropertyObject)GetManagedObject(ds);
MethodInfo setter = self.setter;
object newval;
if (val == IntPtr.Zero)
{
Exceptions.RaiseTypeError("cannot delete property");
return(-1);
}
if (setter == null)
{
Exceptions.RaiseTypeError("property is read-only");
return(-1);
}
if (!Converter.ToManaged(val, self.info.PropertyType, out newval, true))
{
return(-1);
}
bool is_static = setter.IsStatic;
if (ob == IntPtr.Zero || ob == Runtime.PyNone)
{
if (!is_static)
{
Exceptions.RaiseTypeError("instance property must be set on an instance");
return(-1);
}
}
try
{
if (!is_static)
{
var co = GetManagedObject(ob) as CLRObject;
if (co == null)
{
Exceptions.RaiseTypeError("invalid target");
return(-1);
}
if (self.setterCache == null && !self.setterCacheFailed)
{
// if the setter is not public 'GetSetMethod' will not find it
// but calling 'SetValue' will work, so for backwards compatibility
// we will use it instead
self.setterCache = BuildSetter(self.info);
if (self.setterCache == null)
{
self.setterCacheFailed = true;
}
}
if (self.setterCacheFailed)
{
self.info.SetValue(co.inst, newval, null);
}
else
{
self.setterCache(co.inst, newval);
}
}
else
{
self.info.SetValue(null, newval, null);
}
return(0);
}
catch (Exception e)
{
if (e.InnerException != null)
{
e = e.InnerException;
}
Exceptions.SetError(e);
return(-1);
}
}