/* Method object interface */

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

/* This is about the type 'builtin_function_or_method',
 not Python methods in user-defined classes. See classobject.h
 for the latter. */

PyAPI_DATA(PyTypeObject) PyCFunction_Type;

#define PyCFunction_Check(op) (Py_TYPE(op) == &PyCFunction_Type)

typedef PyObject *(*PyCFunction)(PyObject *, PyObject *);
typedef PyObject *(*PyCFunctionWithKeywords)(PyObject *, PyObject *,
					 PyObject *);
typedef PyObject *(*PyNoArgsFunction)(PyObject *);

PyAPI_FUNC(PyCFunction) PyCFunction_GetFunction(PyObject *);
PyAPI_FUNC(PyObject *) PyCFunction_GetSelf(PyObject *);
PyAPI_FUNC(int) PyCFunction_GetFlags(PyObject *);

/* Macros for direct access to these values. Type checks are *not*
 done, so use with care. */
#define PyCFunction_GET_FUNCTION(func) \
 (((PyCFunctionObject *)func) -> m_ml -> ml_meth)
#define PyCFunction_GET_SELF(func) \
	(((PyCFunctionObject *)func) -> m_self)
#define PyCFunction_GET_FLAGS(func) \
	(((PyCFunctionObject *)func) -> m_ml -> ml_flags)
PyAPI_FUNC(PyObject *) PyCFunction_Call(PyObject *, PyObject *, PyObject *);

struct PyMethodDef {
 const char	*ml_name;	/* The name of the built-in function/method */
 PyCFunction ml_meth;	/* The C function that implements it */
 int		 ml_flags;	/* Combination of METH_xxx flags, which mostly
				 describe the args expected by the C func */
 const char	*ml_doc;	/* The __doc__ attribute, or NULL */
};
typedef struct PyMethodDef PyMethodDef;

PyAPI_FUNC(PyObject *) Py_FindMethod(PyMethodDef[], PyObject *, const char *);

#define PyCFunction_New(ML, SELF) PyCFunction_NewEx((ML), (SELF), NULL)
PyAPI_FUNC(PyObject *) PyCFunction_NewEx(PyMethodDef *, PyObject *, 
					 PyObject *);

/* Flag passed to newmethodobject */
#define METH_OLDARGS 0x0000
#define METH_VARARGS 0x0001
#define METH_KEYWORDS 0x0002
/* METH_NOARGS and METH_O must not be combined with the flags above. */
#define METH_NOARGS 0x0004
#define METH_O 0x0008

/* METH_CLASS and METH_STATIC are a little different; these control
 the construction of methods for a class. These cannot be used for
 functions in modules. */
#define METH_CLASS 0x0010
#define METH_STATIC 0x0020

/* METH_COEXIST allows a method to be entered eventhough a slot has
 already filled the entry. When defined, the flag allows a separate
 method, "__contains__" for example, to coexist with a defined 
 slot like sq_contains. */

#define METH_COEXIST 0x0040

typedef struct PyMethodChain {
 PyMethodDef *methods;		/* Methods of this type */
 struct PyMethodChain *link;	/* NULL or base type */
} PyMethodChain;

PyAPI_FUNC(PyObject *) Py_FindMethodInChain(PyMethodChain *, PyObject *,
 const char *);

typedef struct {
 PyObject_HEAD
 PyMethodDef *m_ml; /* Description of the C function to call */
 PyObject *m_self; /* Passed as 'self' arg to the C func, can be NULL */
 PyObject *m_module; /* The __module__ attribute, can be anything */
} PyCFunctionObject;

PyAPI_FUNC(int) PyCFunction_ClearFreeList(void);

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