pythonnet-rawsvnmig/pythonnet/src/runtime/classbase.cs at master · pythonnet/pythonnet-rawsvnmig · GitHub

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// ==========================================================================

// This software is subject to the provisions of the Zope Public License,

// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.

// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

// FOR A PARTICULAR PURPOSE.

// ==========================================================================

using System;

using System.Collections;

using System.Reflection;

using System.Security;

using System.Runtime.InteropServices;

namespace Python.Runtime {

/// <summary>

/// Base class for Python types that reflect managed types / classes.

/// Concrete subclasses include ClassObject and DelegateObject. This

/// class provides common attributes and common machinery for doing

/// class initialization (initialization of the class __dict__). The

/// concrete subclasses provide slot implementations appropriate for

/// each variety of reflected type.

/// </summary>

internal class ClassBase : ManagedType {

internal Indexer indexer;

internal Type type;

internal ClassBase(Type tp) : base() {

indexer = null;

type = tp;

}

internal virtual bool CanSubclass() {

return (!this.type.IsEnum);

}

//====================================================================

// Implements __init__ for reflected classes and value types.

//====================================================================

public static int tp_init(IntPtr ob, IntPtr args, IntPtr kw) {

return 0;

}

//====================================================================

// Default implementation of [] semantics for reflected types.

//====================================================================

public virtual IntPtr type_subscript(IntPtr idx) {

return Exceptions.RaiseTypeError("unsubscriptable object");

}

//====================================================================

// Standard comparison implementation for instances of reflected types.

//====================================================================

public static int tp_compare(IntPtr ob, IntPtr other) {

if (ob == other) {

return 0;

}

CLRObject co1 = GetManagedObject(ob) as CLRObject;

CLRObject co2 = GetManagedObject(other) as CLRObject;

Object o1 = co1.inst;

Object o2 = co2.inst;

if (Object.Equals(o1, o2)) {

return 0;

}

return -1;

}

//====================================================================

// Standard iteration support for instances of reflected types. This

// allows natural iteration over objects that either are IEnumerable

// or themselves support IEnumerator directly.

//====================================================================

public static IntPtr tp_iter(IntPtr ob) {

CLRObject co = GetManagedObject(ob) as CLRObject;

if (co == null) {

return Exceptions.RaiseTypeError("invalid object");

}

IEnumerable e = co.inst as IEnumerable;

IEnumerator o;

if (e != null) {

o = e.GetEnumerator();

}

else {

o = co.inst as IEnumerator;

if (o == null) {

string message = "iteration over non-sequence";

return Exceptions.RaiseTypeError(message);

}

return new Iterator(o).pyHandle;

}

//====================================================================

// Standard __hash__ implementation for instances of reflected types.

//====================================================================

public static IntPtr tp_hash(IntPtr ob) {

CLRObject co = GetManagedObject(ob) as CLRObject;

if (co == null) {

return Exceptions.RaiseTypeError("unhashable type");

}

return new IntPtr(co.inst.GetHashCode());

}

//====================================================================

// Standard __str__ implementation for instances of reflected types.

//====================================================================

public static IntPtr tp_str(IntPtr ob) {

CLRObject co = GetManagedObject(ob) as CLRObject;

if (co == null) {

return Exceptions.RaiseTypeError("invalid object");

}

return Runtime.PyString_FromString(co.inst.ToString());

}

//====================================================================

// Default implementations for required Python GC support.

//====================================================================

public static int tp_traverse(IntPtr ob, IntPtr func, IntPtr args) {

return 0;

}

public static int tp_clear(IntPtr ob) {

return 0;

}

public static int tp_is_gc(IntPtr type) {

return 1;

}

//====================================================================

// Standard dealloc implementation for instances of reflected types.

//====================================================================

public static void tp_dealloc(IntPtr ob) {

ManagedType self = GetManagedObject(ob);

IntPtr dict = Marshal.ReadIntPtr(ob, ObjectOffset.ob_dict);

if (dict != IntPtr.Zero) {

Runtime.Decref(dict);

}

Runtime.PyObject_GC_UnTrack(self.pyHandle);

Runtime.PyObject_GC_Del(self.pyHandle);

Runtime.Decref(self.tpHandle);

self.gcHandle.Free();

}

pythonnet-rawsvnmig/pythonnet/src/runtime/classbase.cs at master · pythonnet/pythonnet-rawsvnmig · GitHub

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