/* Tuple object interface */

#ifndef Py_TUPLEOBJECT_H

#define Py_TUPLEOBJECT_H

#ifdef __cplusplus

extern "C" {

#endif

/*

Another generally useful object type is a tuple of object pointers.

For Python, this is an immutable type.  C code can change the tuple items

(but not their number), and even use tuples are general-purpose arrays of

object references, but in general only brand new tuples should be mutated,

not ones that might already have been exposed to Python code.

*** WARNING *** PyTuple_SetItem does not increment the new item's reference

count, but does decrement the reference count of the item it replaces,

if not nil.  It does *decrement* the reference count if it is *not*

inserted in the tuple.  Similarly, PyTuple_GetItem does not increment the

returned item's reference count.

*/

typedef struct {

    PyObject_VAR_HEAD

    PyObject *ob_item[1];

    /* ob_item contains space for 'ob_size' elements.

     * Items must normally not be NULL, except during construction when

     * the tuple is not yet visible outside the function that builds it.

     */

} PyTupleObject;

PyAPI_DATA(PyTypeObject) PyTuple_Type;

#define PyTuple_Check(op) \

                 PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_TUPLE_SUBCLASS)

#define PyTuple_CheckExact(op) (Py_TYPE(op) == &PyTuple_Type)

PyAPI_FUNC(PyObject *) PyTuple_New(Py_ssize_t size);

PyAPI_FUNC(Py_ssize_t) PyTuple_Size(PyObject *);

PyAPI_FUNC(PyObject *) PyTuple_GetItem(PyObject *, Py_ssize_t);

PyAPI_FUNC(int) PyTuple_SetItem(PyObject *, Py_ssize_t, PyObject *);

PyAPI_FUNC(PyObject *) PyTuple_GetSlice(PyObject *, Py_ssize_t, Py_ssize_t);

PyAPI_FUNC(int) _PyTuple_Resize(PyObject **, Py_ssize_t);

PyAPI_FUNC(PyObject *) PyTuple_Pack(Py_ssize_t, ...);

/* Macro, trading safety for speed */

#define PyTuple_GET_ITEM(op, i) (((PyTupleObject *)(op))->ob_item[i])

#define PyTuple_GET_SIZE(op)    Py_SIZE(op)

/* Macro, *only* to be used to fill in brand new tuples */

#define PyTuple_SET_ITEM(op, i, v) (((PyTupleObject *)(op))->ob_item[i] = v)

PyAPI_FUNC(int) PyTuple_ClearFreeList(void);

#ifdef __cplusplus

}

#endif

#endif /* !Py_TUPLEOBJECT_H */