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Filename : descrobject.h
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#ifndef Py_CPYTHON_DESCROBJECT_H
#  error "this header file must not be included directly"
#endif

typedef PyObject *(*wrapperfunc)(PyObject *self, PyObject *args,
                                 void *wrapped);

typedef PyObject *(*wrapperfunc_kwds)(PyObject *self, PyObject *args,
                                      void *wrapped, PyObject *kwds);

struct wrapperbase {
    const char *name;
    int offset;
    void *function;
    wrapperfunc wrapper;
    const char *doc;
    int flags;
    PyObject *name_strobj;
};

/* Flags for above struct */
#define PyWrapperFlag_KEYWORDS 1 /* wrapper function takes keyword args */

/* Various kinds of descriptor objects */

typedef struct {
    PyObject_HEAD
    PyTypeObject *d_type;
    PyObject *d_name;
    PyObject *d_qualname;
} PyDescrObject;

#define PyDescr_COMMON PyDescrObject d_common

#define PyDescr_TYPE(x) (((PyDescrObject *)(x))->d_type)
#define PyDescr_NAME(x) (((PyDescrObject *)(x))->d_name)

typedef struct {
    PyDescr_COMMON;
    PyMethodDef *d_method;
    vectorcallfunc vectorcall;
} PyMethodDescrObject;

typedef struct {
    PyDescr_COMMON;
    PyMemberDef *d_member;
} PyMemberDescrObject;

typedef struct {
    PyDescr_COMMON;
    PyGetSetDef *d_getset;
} PyGetSetDescrObject;

typedef struct {
    PyDescr_COMMON;
    struct wrapperbase *d_base;
    void *d_wrapped; /* This can be any function pointer */
} PyWrapperDescrObject;

PyAPI_DATA(PyTypeObject) _PyMethodWrapper_Type;

PyAPI_FUNC(PyObject *) PyDescr_NewWrapper(PyTypeObject *,
                                                struct wrapperbase *, void *);
PyAPI_FUNC(int) PyDescr_IsData(PyObject *);