/* 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 *(*_PyCFunctionFast) (PyObject *, PyObject *const *, Py_ssize_t);
typedef PyObject *(*PyCFunctionWithKeywords)(PyObject *, PyObject *,
 PyObject *);
typedef PyObject *(*_PyCFunctionFastWithKeywords) (PyObject *,
 PyObject *const *, Py_ssize_t,
 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. */
#ifndef Py_LIMITED_API
#define PyCFunction_GET_FUNCTION(func) \
 (((PyCFunctionObject *)func) -> m_ml -> ml_meth)
#define PyCFunction_GET_SELF(func) \
 (((PyCFunctionObject *)func) -> m_ml -> ml_flags & METH_STATIC ? \
 NULL : ((PyCFunctionObject *)func) -> m_self)
#define PyCFunction_GET_FLAGS(func) \
 (((PyCFunctionObject *)func) -> m_ml -> ml_flags)
#endif
PyAPI_FUNC(PyObject *) PyCFunction_Call(PyObject *, PyObject *, PyObject *);

#ifndef Py_LIMITED_API
PyAPI_FUNC(PyObject *) _PyCFunction_FastCallDict(PyObject *func,
 PyObject *const *args,
 Py_ssize_t nargs,
 PyObject *kwargs);
#endif

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;

#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 -- unsupported now */
#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 even though 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

#ifndef Py_LIMITED_API
#define METH_FASTCALL 0x0080
#endif

/* This bit is preserved for Stackless Python */
#ifdef STACKLESS
#define METH_STACKLESS 0x0100
#else
#define METH_STACKLESS 0x0000
#endif

#ifndef Py_LIMITED_API
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 */
 PyObject *m_weakreflist; /* List of weak references */
 vectorcallfunc vectorcall;
} PyCFunctionObject;

PyAPI_FUNC(PyObject *) _PyMethodDef_RawFastCallDict(
 PyMethodDef *method,
 PyObject *self,
 PyObject *const *args,
 Py_ssize_t nargs,
 PyObject *kwargs);

PyAPI_FUNC(PyObject *) _PyMethodDef_RawFastCallKeywords(
 PyMethodDef *method,
 PyObject *self,
 PyObject *const *args,
 Py_ssize_t nargs,
 PyObject *kwnames);
#endif

PyAPI_FUNC(int) PyCFunction_ClearFreeList(void);

#ifndef Py_LIMITED_API
PyAPI_FUNC(void) _PyCFunction_DebugMallocStats(FILE *out);
PyAPI_FUNC(void) _PyMethod_DebugMallocStats(FILE *out);
#endif

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