cpython/Include/classobject.h

#ifndef Py_CLASSOBJECT_H
#define Py_CLASSOBJECT_H
#ifdef __cplusplus
extern "C" {
#endif

/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.

                        All Rights Reserved

Copyright (c) 2000, BeOpen.com.
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
All rights reserved.

See the file "Misc/COPYRIGHT" for information on usage and
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.

******************************************************************/

/* Class object interface */

/* Revealing some structures (not for general use) */

typedef struct {
	PyObject_HEAD
	PyObject	*cl_bases;	/* A tuple of class objects */
	PyObject	*cl_dict;	/* A dictionary */
	PyObject	*cl_name;	/* A string */
	/* The following three are functions or NULL */
	PyObject	*cl_getattr;
	PyObject	*cl_setattr;
	PyObject	*cl_delattr;
} PyClassObject;

typedef struct {
	PyObject_HEAD
	PyClassObject	*in_class;	/* The class object */
	PyObject	*in_dict;	/* A dictionary */
} PyInstanceObject;

typedef struct {
	PyObject_HEAD
	PyObject *im_func;   /* The callable object implementing the method */
	PyObject *im_self;   /* The instance it is bound to, or NULL */
	PyObject *im_class;  /* The class that defined the method */
} PyMethodObject;

extern DL_IMPORT(PyTypeObject) PyClass_Type, PyInstance_Type, PyMethod_Type;

#define PyClass_Check(op) ((op)->ob_type == &PyClass_Type)
#define PyInstance_Check(op) ((op)->ob_type == &PyInstance_Type)
#define PyMethod_Check(op) ((op)->ob_type == &PyMethod_Type)

extern DL_IMPORT(PyObject *) PyClass_New Py_PROTO((PyObject *, PyObject *, PyObject *));
extern DL_IMPORT(PyObject *) PyInstance_New Py_PROTO((PyObject *, PyObject *, PyObject *));
extern DL_IMPORT(PyObject *) PyMethod_New Py_PROTO((PyObject *, PyObject *, PyObject *));

extern DL_IMPORT(PyObject *) PyMethod_Function Py_PROTO((PyObject *));
extern DL_IMPORT(PyObject *) PyMethod_Self Py_PROTO((PyObject *));
extern DL_IMPORT(PyObject *) PyMethod_Class Py_PROTO((PyObject *));

/* Macros for direct access to these values. Type checks are *not*
   done, so use with care. */
#define PyMethod_GET_FUNCTION(meth) \
        (((PyMethodObject *)meth) -> im_func)
#define PyMethod_GET_SELF(meth) \
	(((PyMethodObject *)meth) -> im_self)
#define PyMethod_GET_CLASS(meth) \
	(((PyMethodObject *)meth) -> im_class)

extern DL_IMPORT(int) PyClass_IsSubclass Py_PROTO((PyObject *, PyObject *));

extern DL_IMPORT(PyObject *) PyInstance_DoBinOp
	Py_PROTO((PyObject *, PyObject *,
		  char *, char *,
		  PyObject * (*) Py_PROTO((PyObject *, PyObject *)) ));

#ifdef __cplusplus
}
#endif
#endif /* !Py_CLASSOBJECT_H */